Dissertations / Theses on the topic 'Steelwork'
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Mahfouz, S. Y. "Design optimization of structural steelwork." Thesis, University of Bradford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.534650.
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Horkeby, Filip, and Melanie Larsson. "Quality Assurance of Pressure Equipment Materials and Steelwork." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-127336.
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Kvalitetskraven i samhället blir allt högre och det blir allt tuffare för producenterna att hålla de kvalitetskrav som krävs av kund, men också att uppnå de kvalitetsdirektiv som finns i EU idag. Det finns idag en mängd olika definitioner på vad kvalitet är och hur kvaliteten ska uppnås. EU kräver att alla produkter ska ha CE-märkning, vilket är en försäkring om att produkterna håller den kvalitet som definierad av EUs lagstiftning. För att möta de krav som finns på kvalitet idag undersöker Siemens Industrial Turbomachinery AB om deras leverantörer följer de direktiv som krävs för tryckbärande anordningar. För att materialen i de tryckbärande anordningarna ska vara godkända krävs det att ståltillverkaren är godkänd för tillverkningen. Ståltillverkaren ska kunna bekräfta godkännandet genom att uppvisa ett så kallat PED certifikat (Pressure Equipment Directive, 97/23/EC).
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Hindi, Waleed A. "Behaviour and design of stiffened compression flanges of steel box girder bridges." Thesis, University of Surrey, 1991. http://epubs.surrey.ac.uk/843763/.
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The objective of the work reported in this thesis is to study the behaviour of stiffened compression flanges of steel box girder bridges. Various collapse modes and many different parameters that effect the behaviour of the stiffened panels which make up the flanges have been considered. In order to achieve this, a series of three parametric studies have been carried out using a finite element package (LUSAS), which allows for both material and geometric non-linearities. The aim of the work was, in the main, to provide a datum for assessing design recommendations being prepared for the ECCS (European Convention for Constructional Steelwork), and to help in their development. The recommendations were developed as part of this research programme. The first parametric study looked at a range of isolated stiffened panels subjected to uniform uniaxial compression, representing the compression flange of a box girder subjected to pure moment. This validated the basic requirements within the recommendations for the strength of longitudinally stiffened flange panels. The second study was aimed at examining the effect of the shear flexibility of the flange of a girder loaded by vertical shear. In order to study the influence of this flexibility which results in a lag in stresses across the box width relative to the edges (shear lag), finite element results were generated for panels loaded along their longitudinal edges by in-plane uniform shear stress. A new model has been established from these results to predict the effect of shear lag. The model consists of two equations. The first is concerned with the prediction of the elastic shear lag effective breadth ratio while the second is concerned with the effect of shear lag at collapse. The latter is substantially different because of the ability for plastic redistribution of direct stress to occur across the flange prior to collapse. Finally, a third study looked at the forces on, and the behaviour of the cross-frames in orthogonally stiffened flanges. The results of the study showed that the flange applied a more complex lateral load distribution to these stiffeners than currently considered in design practice with, for some parameters, substantially higher load levels than required in the strength requirement of the British code for the design of bridges. A modification is proposed to the rules to provide transverse stiffeners which satisfy both stiffness and strength considerations.
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劉光磊 and Guanglei Liu. "Modelling of cold rolling textures in mild steel." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31237435.
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Liu, Guanglei. "Modelling of cold rolling textures in mild steel /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19712790.
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Bahrami, Mohammad. "Behaviour of beam-to-column end plate connections in structural steelwork." Thesis, University of Abertay Dundee, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304312.
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Zhou, Li. "Machining chip breaking prediction with grooved inserts in steel turning." Link to electronic thesis, 2001. http://www.wpi.edu/Pubs/ETD/Available/etd-0109102-140803.
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Butterworth, James William. "Bolt Force Distribution In Structural Steelwork Extended End Plate Beam-To-Column Connections." Thesis, Teesside University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518724.
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Wang, Zhi Min. "Behaviour of unstiffened flush end plate beam-to-column connections in structural steelwork." Thesis, Abertay University, 1996. https://rke.abertay.ac.uk/en/studentTheses/a829d377-ad70-47d0-b94e-17da407ea3ae.
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End plate connections are extensively used as moment resistant connections between members in steel frame. Surveys of the English and Scottish Steelwork Industry clearly indicate that the flush end plate connection is the most popular type of beam-to-column connection in steel-framed structures. The popularity of this connection can be attributed to the simplicity of the connection detail and economy associated with their fabrication and erection. Flush end plate connection is less rigid and has a lower moment capacity than that of an extended end plate connection. If a rigid joint is aimed extended end plate connection should be used, whereas if a semi-rigid joint is needed flush end plate can be employed. The main objectives of this project were to carry out in-depth investigation of the behaviour of this type of connection by applying finite element technique and experimental means. A three dimensional finite element prediction model of the unstiffened flush end plate beam-to-column connection was developed. Six full scale tests were conducted and the results were analysed. Comparison between analytical and experimental results was made. The analytical investigation into the contribution of the various connection components toward the moment rotation characteristics was carried out. The investigation of bolt force and prying force were also carried out. Comparison between analytical, experimental results and the results obtained by applying the design rules of Eurocode 3 was made. By comparing the experimental results with the analytical results using finite element method, it was found that the finite element method was quite capable of tackling the complex problem of flush end plate connections. Finite element computer models can be used to simulate structural behaviour of the connections, which can be useful to the design of the connections. By comparing the results of the tests, finite element analyses and the design rules of Eurocode 3, it was found that the Annex J of Eurocode 3 significantly underestimated the moment resistance capacity of many joints and appear to predict the failure type incorrectly. Recommendations on future work on column web buckling, the effect of bolt heads and nuts, the sectional fillets and the effect of welding are also made which should be carried out before a comprehensive design procedure could be developed.
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Kadhim, Majid. "Dynamic response of structural steel elements post-strengthened with CFRP." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/dynamic-response-of-structural-steel-elements-poststrengthened-with-cfrp(6e71c4d5-0bc5-4274-bd84-f99b0c966bb1).html.
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Structural elements in buildings and civil engineering infrastructure can often be vulnerable to various kinds of impact actions during their service life. These actions could result from various sources e.g. collision of vehicles, ships and vessels or falling masses in industrial buildings. Since, for various reasons, such accidental actions have not always been considered in the existing engineering design of buildings and civil engineering structures such as bridges etc., investigation of effective structural strengthening techniques is justified. As fibre reinforced polymer (FRP) composites have commonly been employed efficiently to strengthen steel members against static and fatigue loads, examining the FRP strengthening technique to enhance structural steelwork in impact situations is the main focus of this study. The research aims to experimentally investigate the dynamic behavioural response of axially loaded steel columns and steel beams strengthened with various carbon fibre reinforced polymer (CFRP) configurations. To achieve this goal, a series of experimental tests was implemented including testing a number of CFRP strengthened and unstrengthened steel beams and columns under static and impact loads. The experimental results show that CFRP can improve the global and local behaviour of steel members subjected to impact loads. This improvement varied depending on the CFRP configuration, the amount of CFRP and the pre-existing axial load value in the member. In order to examine all the parameters that can affect the dynamic behaviour of CFRP strengthened steel members in addition to those not included in the experimental programme, a comprehensive numerical simulation of the experimental work was carried out using a validated finite element model. Afterwards, an extensive parametric study was conducted to provide a comprehensive understanding of the behaviour of CFRP strengthened steel members subjected to impact load. The simulation results illustrate that the effectiveness of CFRP increases with high impact energies. The parametric study results have also revealed that the configurations and distributions of CFRP have a major influence on the effectiveness of the reinforcement. A detailed numerical assessment has also been performed to find the CFRP effectiveness when applied to full-scale steel columns. It has been found that strengthening with CFRP in practical quantities and configurations could prevent steel columns from failure under transverse impact loading. The strengthening effectiveness was found to be dependent on boundary conditions, impact velocity, impact mass, impact location, preloading level, impact direction, CFRP configuration, and the length and thickness of the CFRP. Based on the results obtained from the full-scale simulation, it has been found that the CFRP strengthening technique can be used efficiently and effectively at the scale of elements common in everyday building and infrastructure. This study also provides a useful database for different kinds of strengthening configurations, impact velocities and masses, boundary conditions, etc.
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Munyebvu, T. "Sustainability in the built environment : the embodied carbon of steelwork in non-residential building structures." Thesis, University of Salford, 2016. http://usir.salford.ac.uk/39101/.
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This thesis describes a doctoral research undertaken on the embodied carbon of steelwork used in non-residential buildings. The broad area of sustainable development in the built environment is reviewed first and a reasoned rationale for the narrowing of the research topic to structural steelwork provided. The research then concentrated on steel, from the energy-intensive steelmaking process to the 100% recyclability of steel components at the end of a building life. Carbon emissions and energy consumption at various stages of steel production, manufacture, construction, maintenance and end-of-life are reviewed in detail. It has been established that a significant amount of research and energy saving initiatives are underway in the steelmaking industry. However, although research is taking place in the downstream processes, the effort is not well co-ordinated, resulting in numerous gaps in existing environmental data. In an attempt to close some of these gaps, a case study has been carried out on the fabrication and erection phases of a real steel building structure. The various activities, from procurement of materials to the erection of the steel frame on site, are described in detail. Furthermore, steel quantities of the fabricated frame were recorded during the case study, from which the carbon emission of the building was calculated using the British Constructional Steelwork Association (BCSA) Carbon Footprint Tool. This carbon footprint was estimated to be 12498 tCO2 from the 4747 tonnes of steel, giving an average emission figure of 2.63 kgCO2/kg for the cradle to end-of-erection boundary case. The building had internal plan dimensions of 94m by 57m, which gave a carbon footprint of 2.3 tCO2/m2 of floor area.
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Li, Hongchun. "A study on wear and surface roughness of work roll in cold rolling." School of Mechanical, Materials and Mechatronic Engineering - Faculty of Engineering, 2008. http://ro.uow.edu.au/theses/125.
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The objective of this study is to improve our understanding of the evolution and tribological behaviour of work roll surfaces in cold rolling because surface deterioration affects the quality of products and the efficiency of production. The cost of rolls is almost 25% of the cost of cold steel production. An experimental Lateral Set-testing (LST) mini-mill was developed to make use of the Gleeble 3500 thermo-mechanical simulator functions to evaluate, for the first time, the roll material surface features, surface roughness, fast Fourier transform (FFT) and Power Spectral Density (PSD) of frequency distribution, after single and multi-pass rolling. A low carbon-steel was prepared for the paired disc and then experiments on disc-to-disc wear were carried out to test surface deterioration and friction. In the laboratory, material imitating an industrial roll was manufactured. One batch contained 4%Cr and another contained 4%Cr plus approximately 0.1% Ti. These materials were compared against each other in the LST and disc-to-disc experiments. Experiments considered a series of parameters, including strip reduction, speed, and lubrication, while the disc-to-disc experiments considered duration of wear, forward and backward slip and load amplitude. The surfaces of the LST roller and disc were evaluated by surface technologies such as Atomic Force Microscope (AFM), Scanning Electron Microscope (SEM), and surface profile-meters. Transmission Electron Microscope (TEM) and X-ray diffraction wear properties. Test results from the mini-mill reveal that dominant waviness of the surface roughness still exists on the surface after a single pass of rolling and a 30.5% reduction is a critical reduction level that has a significant influence on the density of power spectrum. A rougher work piece results in a larger power spectrum of the surface profile. It has found that the PSD altitude of the roller surface is significantly affected axially but is more sensitive to its original surface roughness circumferentially. It is distributed in an inverse order to the surface roughness in a high frequency domain. The addition of Ti alters surface deterioration. Lubrication has a significant effect on surfaces containing either 4Cr% or 4%Cr+Ti, affecting surface roughness of rollers containing 4%Cr more significantly. In the disc-to-disc tests, more material was removed in the first 60 minutes from the disc containing Ti than the disc containing only 4%Cr. In general, roll material with 4%Cr+Ti reveals to have better anti-abrasive properties than the roll with only 4%Cr, while lubrication significantly reduced the wear rate and amount of material removed from both materials. The speed of the disc influences the weight loss, ie, the higher the speed the greater the amount of material removed. The slip rate also affects roll wear and weight loss because as the speed increases, so do the slip and loss of weight. The coefficients of friction are between 0.35~0.75 when the contact was dry and 0.06~0.11 when lubrication was applied. Adhesive friction dominated the dry contact while a mixed lubrication regime features friction behaviour when emulsion lubrication was applied. A backward slip of 2% and a forward slip of 1.5% resulted in a different coefficient of friction in dry contact mode although the corresponding torques were similar. The torque and coefficient of friction are found to increase with disc speed in dry contact condition. Lubrication alters the friction of both materials. The coefficient of friction decreases with speed on the disc with added Ti but the effect of load is in the opposite trend, while the disc with 4%Cr was less influenced by speed. The coefficient of friction is more sensitive to load at higher speeds on the disc with 4%Cr than at slower speeds on the disc with Ti added. This indicates that the addition of Ti enhances the tribological behaviour of rollers because the disc with Ti additive is characterised by carbonitrades precipitated in a refined tempered martensitic matrix. Coarse carbides characterise the 4%Cr disc materials. Surface defects of the work rolls, including banding, spalling, marking and welding in a cold strip plant, were investigated. It was found that early failures principally resulted from operational factors and roll material off-specification micro-structure defects rather than wear. It is recommended that different grades materials of the roll and strip with different roughness and hardness to be tested and studied on the evolution and tribological behaviour of roll surfaces in the future.
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Spanka, Marina [Verfasser], Tim [Gutachter] Mansfeldt, and Georg [Gutachter] Bareth. "Minimizing the release of Chromium, Molybdenum, Vanadium, and Fluoride from Steelwork Slags / Marina Spanka ; Gutachter: Tim Mansfeldt, Georg Bareth." Köln : Universitäts- und Stadtbibliothek Köln, 2018. http://d-nb.info/1168380014/34.
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Freyer, Burkhard Heinrich. "Gauge and tension control during the acceleration phase of a steckel hot rolling mill." Diss., University of Pretoria, 2002. http://hdl.handle.net/2263/24580.
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Please read the abstract in the section, 00front of this documentDissertation (M Eng (Electronic Engineering))--University of Pretoria, 2002.
Electrical, Electronic and Computer Engineering
MEng
unrestricted
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Zhou, Li. "Machining chip-breaking prediction with grooved inserts in steel turning." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0109102-140803.
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Pugh, Daniel. "Combustion characterisation of compositionally dynamic steelworks gases." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/58006/.
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This thesis investigates the combustion of fuel compositions representative of those produced by the integrated steelmaking process. As organisations strive for improvements in utilisation efficiency with increasingly complex technologies, more detailed understanding is required to accurately simulate combustion of the potentially weak and dilute fuels, and thereby aid design processes. Dynamic fuel properties have been characterised through experimentation, in addition to a comparison of numerically simulated results obtained from chemical kinetics. The parameters identified to investigate fuel behaviour were laminar burning velocity and Markstein Length, and characterised with regard to operational instability in practical combustion systems. The design and construction of a suitable experimental rig is detailed, as required to facilitate the accurate determination of burning velocities by quantifying the outward propagation of spherical flames. A regressive analytical technique was developed based on previous studies, nonlinearly relating propagation to change in stretch rate. The developed solution was benchmarked against analogous studies in literature, and ensured experimental performance was accurate and repeatable for the well documented combustion of methane. Steelworks gases were tested to attain representative burning velocities, with significant attention paid to the change resulting from fluctuation in blast furnace gas H2 fraction. The study characterised the observed sensitivity to change in flame speed and discussed the implications with regard to practical combustion systems. Several methods of reducing the measured fluctuation are subsequently quantified, including change in ambient condition, and relative humidity. Non-monotonic behaviour was observed for the latter effect, with a suggested trade-off between a chemically catalytic influence on intermediate species, and lowering of flame temperature. Consequently this suggested water addition could be an effective mechanism for the reduction of H2 induced flame speed variation for blast furnace gas, and influence other synthesised fuels comprising large quantities of CO, including BOS gas. Additional steelworks gases were blended in different ratios to assess dynamic combustive properties relating to fuel flexibility, and the effectiveness of minimising fluctuation in combustion behaviour.
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Williams, Christopher Lloyd. "A waste heat recovery strategy for an integrated steelworks." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/87146/.
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UK energy prices have doubled over the last decade, which has driven the UK Iron and Steel Industry to invest in energy efficient technologies. However, even with these relatively high prices the industry still finds it difficult to build a business case to justify waste heat recovery projects. The Steel Industry has large quantities of waste heat and there are technologies readily available for its capture, but often the issue has been finding a cost effective ‘end use’. Individual schemes incorporating both capturing and an ‘end use’ for the waste heat often incur high capital costs with resulting long payback times. This thesis defines the development and modelling of a strategy and methodology for the utilisation of waste heat recovery in a UK based Steelworks. The methodology involves the utilisation of the existing steam distribution circuit to link the possible waste heat schemes together with a single ‘end user’ thus limiting the capital requirement for each subsequent project. The thesis defines the development of a numerical model that is initially verified through extensive comparison to actual plant data from a series of pre-defined operational scenarios. The model is used to predict the pressure and temperature effects on the steam distribution system as the waste heat recovery boilers from various areas of the case study steelworks are connected up to it. The developed strategy stimulated significant capital investment for the CSSW and has generated over 100,000 MWh and is therefore saving over £7m and 50,000 tonnes of indirect CO2 emissions per annum. The thesis discusses and recommends further research and modelling for low, medium and high grade waste heat as well as the potential of a partial de-centralisation of the steam system. The output of the thesis is referenced by the DECC as an example of waste heat recovery in UK industry.
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Houecande, Orianne. "Chimie de l'eau et transport particulaire dans un crassier sidérurgique : de la zone non saturée à la zone saturée." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEM022/document.
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Les particules mobiles du sol peuvent transporter des polluants vers la nappe phréatique. Dans les crassiers sidérurgiques, les éléments métalliques lixiviés contribuent à une contamination rapide des eaux du sol. L’objectif de ce travail est de comprendre les mécanismes qui interviennent dans le transport en solution et sous forme particulaire dans des déchets sidérurgiques stockés sur le long terme. Pour ce faire, une caractérisation complète des compositions minéralogiques et chimiques a été effectuée. Elle révèle que ces déchets sont constitués de minéraux de haute température typiques des laitiers et de minéraux d’altération météorique. Les eaux de percolation montrent des pH élevés, dus à des teneurs élevées en calcium, et des teneurs importantes en aluminium et silicium. Les teneurs en chrome et molybdène, et ponctuellement en vanadium sont élevées dans les lixiviats des laitiers de fusion. L’analyse granulométrique des particules mobilisées, pour des pluies simulées en colonne, indique que leur taille moyenne est de 200 µm, ce qui laisse prévoir une faible mobilité dans les formations sous-jacentes moins perméables. Les calculs de spéciation montrent que les lixiviats sont saturés ou proches de l'équilibre vis-à-vis des silicates calciques hydratés et souvent saturés en molybdate de calciumMobile soil particles can transport pollutants to groundwater. In slag heaps, leached metallic elements contribute to soil water contamination. The aim of this work is to identify the role of slag particles in contaminant transport under unsaturated and saturated conditions. Mineralogical compositions and physicochemical properties of slags are first determined. The analysis show high temperature slag phases and weathering phases. Percolation tests are also carried out in repacked waste columns under infiltration/drying cycles to find out the effects of dry periods on in situ particle mobilization. Preferential flows lead to rapid transport of solute through the repacked column in vadose zone. Leachates are characterized by high pH and high concentrations of calcium, aluminum and silicon, molybdenum, chromium in the fusion slags. Speciation calculations showed that the leachates are saturated in calcium silicate hydrates. Laser size analyzer shows that the slag particles mobilized during the simulated rain events are around 200 µm, which suggests low mobility in the less permeable underlying formations
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Suvio, Piia. "From threat to an asset : water in steelworks : how modern steelworks can improve water related performance via benchmarking and development of High Density Sludge (HDS) Process." Thesis, Cardiff University, 2011. http://orca.cf.ac.uk/26204/.
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The Water Framework Directive (WFD) 2000/60/EC is set to overhaul the management of the water environment within the EU. Following its enforcement in 2015, changes are expected to the current water related regulations and water intensive industries, including steelworks, ought to prepare themselves for changes. In 2007 Corus Group was taken over by Tata Steel, now one of the World’s top 10 steel producers with its production of 31 MTPA (million tonnes per annum of crude steel). Tata Steel Port Talbot Integrated Steelworks is one of Tata Steel’s main sites, currently producing some 4.33 MTPA (in 2007) of crude steel (slab) and is a major user of water with its 8 production facilities and supporting functions. From 2007 to 2011 the author worked as a core member of the World Steel Association Water Management Project. The project included development of a survey to gather water-related data from the World’s steelworks. 29 steelworks took part in the survey and using the data, an extensive assessment of water related performance in steelworks around the World has been carried out. The findings show that water performance related figures, including water use and effluent generation, vary from under 1 to near 150 m3/ts. The average consumption figure being 28.4 m3/ts with once-through cooling using an average 82% of this water. The average effluent discharge figure is 25.4 m3/ts. For Port Talbot Steelworks these figures are 33.8 m3/ts and 28.8 m3/ts respectively. An investigation into effluent treatment technologies and efficiencies included carrying out chemical precipitation and co-precipitation titration experiments, especially looking at zinc, in order to better understand the behaviour of relevant metals during hydroxide precipitation reactions. The experimental results were compared against PHREEQCi theoretical geomodelling precipitation prediction data and PHREEQCi 2 indicated minimum zinc solubility is received at pH 9.5. Laboratory experiments support this. Iron enhances zinc precipitation strongly via co-precipitation. A similar effect, although to a lesser extent, is achieved for zinc co-precipitation with nickel and lead. The author’s study of the Port Talbot water systems established that the chemical precipitation processes in operation leads to the generation of voluminious sludge that is hard to dewater further. This prompted the initiation of an investigation into the suitability of the High Density Sludge (HDS) process in treating high volume, non-acidic low metal concentration effluents, such as steelworks final effluent. Prior to this research the HDS process has been used mainly for the treatment of mine effluents and its suitability in treating non-acidic, low metal concentration effluent has not been fully explored. During the trial, a 10 L/h influent feed rate was aimed for with a half hour retention time at the first two reactors. The flocculant feed rate was around 2.5-3 mg/l of treated effluent throughout the trial. At the end of the trial the sludge concentrations exceeded 17% (w/w), while the treatment efficiencies of zinc and other metals stabilised and improved. Furthermore, the sludge was behaving as HDS sludge achieving high settling rates in excess of 22 m/h at 5% (w/v). Solids concentrations and sludge filterability had improved with the specific cake resistance reducing from the ‘single pass’ precipitation sludge near 35,000 Gm/kg to the 777 Gm/kg after 2 weeks of trial to a mere 169 Gm/kg at the end of the HDS trial.
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Whant, Louis Mathew. "Stormwater impacts on disharge water quality in licensed drains at the Port Kembla Steelworks." Access electronically, 2005. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20060712.144710/index.html.
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Raghuyal, Syrish. "Characterisation and waste management of the CCA treated wood arising from an integrated steelworks." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/60040/.
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This thesis is concerned with the management of wood waste generated after demolition of a typical 33 year old coke quenching tower from an integrated steelworks. Wood in the coke quenching tower was treated with traditional waterborne preservative, Copper-Chromium-Arsenic (CCA). Due to the growing environmental concern, changes were introduced in the legislation governing the disposal of waste. Hence, the aim of the thesis was to perform a waste management study by investigating CCA treated wood waste and to develop a waste disposal technique. During the characterisation of the wood waste, elemental analysis was performed to confirm CCA concentration remaining in the treated wood waste. Concentration of CCA elements ranged from 300mg/kg to 10,000mg/kg. The concentration reduced with increase in the years of service life of the treated wood. Leaching tests according to British Standards were performed for different durations from 1 hour to 1 month to determine the leaching behaviour exhibited by the wood. Standard and customised sampling procedures were carried out for leaching tests to study and simulate the loss of CCA from the treated wood during a quenching process. These tests provided a leaching pattern that the loss of CCA follows a trend of As > Cu > Cr which was in agreement with the final concentrations of the quenching tower wood, such that chromium was most resistant to leaching and arsenic was most susceptible to leach. Correlations and linear equations were established between the arsenic-chromium and arsenic-copper leach concentrations. Equations were developed to help in predicting the ratio of leach ability of the CCA elements with respect to each other. It was also found that the wood from the tower contained a substantial amount of iron which was further investigated. The growth ring analysis showed that iron was mainly deposited on the wood surface. The prime sources of iron were identified to be kish, an air borne particulate matter found in steelworks environment as well as coke and coke ash. Leaching studies performed to determine the leachability of iron showed that there was a potential for iron to restrict the mobility of CCA elements in soil. A novel three-step chemical extraction method was developed after analysing the sequential analysis performed with different chemical reagents and leaching behaviour of the CCA wood waste. Step one used sodium hydroxide (NaOH) to break down the wood structure by lignin depolymerisation. The use of NaOH provided alkaline conditions and facilitated the process of lignin depolymerisation mainly to release arsenic as water soluble compounds. This was followed by ammonium chloride (NH4Cl) for release of copper, due to the high affinity of ammonium group to form complexes with copper. Hydrogen peroxide (H2O2) was used as a strong oxidising agent and primarily to release the chromium by forming chromium complexes which are readily soluble in water. The effect of the pH, temperature, concentration and order of the reagent to be used were studied. Therefore, CCA wood was subjected to the three-step process, where the order was designed as NaOH followed by NH4Cl and then H2O2 for 1 hour at 100oC with 1 M, 2 M and 2 M concentration respectively. 98 %, 89 % and 96 % for arsenic, chromium and copper respectively was the extraction percentage achieved by the three step process. The three elements were obtained in a water solution and a dry wood residue. The process showed the potential in an alkaline extraction method with high extraction levels in three hours. The process also provided wood residue with possible uses in paper and pulp industry. In order to complete the treatment method the CCA elements present in water solution obtained after the three-step extraction process were required to be precipitated. The CCA elements present in water soluble state were precipitated by using an electrocoagulation process. Various parameters were analysed including type of electrodes, a suitable pH range, current, and concentration of the solution to optimise the whole process. The pH of the solution played a vital role in the precipitation of the elements. The pH value was adjusted to 4 in order to achieve the maximum removal potential. The mild steel electrodes were selected over the aluminium. The iron ions released from the mild steel electrodes formed insoluble complexes with the CCA elements in the solution as compared to the soluble aluminium ions. The final process was optimised to 15 minutes of duration using mild steel electrodes and 0.8 A current at room temperature. The solution used for the electrocoagulation was diluted to the factor of 1:5. The full process precipitated about 99 % of CCA elements from water which was filtered and analysed. Overall, the thesis provided in-depth characterisation of the CCA treated wood waste arising from a steelworks environment. The leaching behaviour and the presence of iron were studied to provide a better understanding for the disposal of such wastes. A chemical extraction method followed by the electrocoagulation for the disposal of CCA treated wood waste provided a foundation for a scaled up treatment method and final disposal of such wastes.
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Dal, Molin Franck Louis Georges. "Characterisation of radioactivity arising from the integrated steelworks in the UK and assessment of occupational exposure situations." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/845761/.
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Most of the materials found on the Earth’s surface, such as iron ores and all other materials entering the integrated steel-making process, contain measurable amounts of natural radioactivity mainly due to the presence of uranium-238 (238U), thorium-232 (232Th) and their respective daughter decay products. Some materials after being processed can present a relatively high concentration of natural radionuclides. These materials are defined as Naturally Occurring Radioactive Materials (NORM). Since 2010, in the United Kingdom, industries producing NORM are subject to a new permitting regime. The current regime is named Environmental Permitting Regulations 2010 (EPR 2010), recently amended and replaced by EPR2016 and is directly derived from the European Directive EURATOM 1996, itself reviewed in 2013 and replaces the previous exemption limits defined in the previous regime Radioactive Substances Act 1993 (RSA93). As a result, the steel industry is now potentially producing materials above the new exemption levels to dispose of and therefore has a new environmental duty to accurately determine the radioactivity content of a wide range of iron- and steel-making materials used on site within the processes and/or sold off to third parties. In the steel industry, the main isotopes of concern are polonium-210 (210Po) and lead-210 (210Pb), which concentrate in the waste off-gas dusts from the iron ore sintering and blast furnaces processes, and radium-226 (226Ra) which can be found in slag materials from the blast furnace process. NORM can also result in potential exposure of the workforce to radioactive substances, mainly in workplaces where NORM are handled, stockpiled or processed. The UK steel industry has a duty of care to protect the workers and assess the potential occupational exposure to natural radioactivity in its workplaces in accordance with the Ionising Radiations Regulations 1999 (IRR99), recently replaced by IRR17 since 1st January 2018.
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Matuš, Ondřej. "Pavilon P brněnského výstaviště - vybrané části stavebně technologického projektu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226103.
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I deal with the constructive technological project about building of pavilion P on the technology side in my masters thesis. The aim is to solve the structure from the aspect of time and financial requirements. I deal in more detail with the project of site equipment, with description the execution of foundation constructions and with construction steelwork.
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Denk, Michael [Verfasser]. "Qualitative and quantitative spectral characterisation of iron- and steelworks by-products : combining information from the visible light to the longwave infrared / Michael Denk." Halle, 2018. http://d-nb.info/116249669X/34.
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Chaudhry, Tariq M., University of Western Sydney, and of Informatics Science and Technology Faculty. "Biogeochemical characterization of metalliferous wastes and potential role of arbuscular mycorrhizae in their phytoremediation." THESIS_FIST_XXX_Chaudhry_T.xml, 1999. http://handle.uws.edu.au:8081/1959.7/442.
Full textAbstract:
Phytoremediation is an innovative technology employing plants for reclamation of soils that have been polluted by industrial contaminants. While it is frequently slower than traditional physicochemical remediation techniques, there are, however, many significant advantages including simplicity, low cost, improvement of soil structure and microbiological fertility. While various hyperaccumulators have been reported from Europe and the USA, there is a need to identify Australian species. This study reports a number of metal accumulators following a soil and vegetation survey of two metal contaminated sites in New South Wales, the spoil (filtercake) heaps of the BHP (Broken Hill Propriety ) steelworks at Port Kembla and the abandoned mine at Sunny Corner. BHP is the largest manufacturer of steel in Australia. The Port Kembla is the largest single steel manufacturing site. Solid by-products from this site totalled 3.1 million tons in 1988. The Sunny Corner mine site was mainly a silver mine which operated over approximately 100 hectares 1184 to 1922 and produced over 100 tonnes of silver during that period. The soil and water in and around the site is heavily contaminated with metals and is distinctly acidic. It was concluded that Ricinus communis, Sonchus oleraceus, baeckea utilis, Poa labillardieri and Pinus radiata are options for heavy metal phytoremediation of contaminated Australian soils. Arbuscular Mycorrhizal infection (particular with Glomus and Gigaspora strains) should be promoted for optimum growth.Doctor of Philosophy (PhD)
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Barreto, José Carlos Nunes. "Caracterização de toxicidade de efluentes de usina siderúrgica mediante bioensaios com microorganismos." Universidade de São Paulo, 1995. http://www.teses.usp.br/teses/disponiveis/6/6134/tde-09022011-122620/.
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Cubatão, na Baixada Santista ficou caracterizada na década de 70 pelo caos ambiental propiciado pela instalação de dezenas de indústrias de base, sem planejamento territorial urbano adequado, sem estudo de impacto ambiental e com poucos equipamentos de controle de poluição do ar, solo e água. Dentre as indústrias sediadas no pólo industrial de Cubatão, a siderúrgica é responsável pela poluição das águas do estuário santista com a maior carga tóxica e 60por cento de Fenol e 70por cento de Metal Pesado, do total lançado por todas as indústrias do Polo. Este trabalho faz levantamento bibliográfico nacional e internacional sobre poluição hídrica de Siderúrgicas notadamente coquerias e mostra pesquisa de campo realizada em 13 campanhas, com amostragens junto a saída de efluentes no porto da empresa no estuário santista. Os resultados das amostras no ponto responsável pelos efluentes das fábricas de coqueria, laminação, aciaria e altos fornos, indicam toxicidade em 80por cento das campanhas e mutagenicidade de moderada a alta em 75por cento das amostras pesquisadas. Os resultados dos bioensaios utilizados, Microtox e Ames, respectivamente para toxicidade aguda e mutagenicidade, foram comparados aos dos últimos trabalhos realizados na COSIPA em 1986 e 1993, e aos relatórios do órgão controlador, CETESB de 1992 e 1994. Abrem - se discussões sobre os resultados que apontam o particulado presente na amostra como tóxico e mutagênico e induzem à proposta de recirculação e reaproveitamento total à jusante da empresa, de todas águas servidas descartadas no processo, a exemplo de países do 1º Mundo que convivem com a produção do açoCubatão, situated in the low lying basin behind the porto f Santos on the coast of the state of São Paulo, Brazil, was notorious during the seventies for the environmental chaos produced by the dozens of basic industries and the lack of adequate urban planning, of studies of the environmental impact caused and with negligible resources for the control of pollution, whether of the air, soil or water. Among the factories located in the industrial park of Cubatão, the steelworks is responsible for the largest toxic contribution as also for 60per cent of the fenol and 70per cent of the heavy metals of the overall total of these substances expelled by the factories of the industrial park. A survey of the literature, both national and international, dealing with the associated coke producing plants, was undertaken and presents field research carried out in the course of 13 campaigns giving the results of samples colleted close to the effluents in the company´s port in the Santos estuay. The results of the bioassays used to assess acute toxicity and mutagenicity, Microtox and Ames respectively, were compared with those found in the last researths undertaken by COSIPA in 1986 and 1993 and with those given in the reports of CETESB, the organ responsible for pollution control, in 1992 and 1994. The results which show that the particles presents in the samples were toxic and mutagenic are discussed and lay the foundation for the proposal that the totality of the water used shoud be returned to above the plant in such away as to permit its constant re use, in accordance with the example given by countries of the first world which have learnt to live with the nead for the production of steel
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R?go, Vilson Ribamar. "Estudo do efeito da adi??o da esc?ria de aciaria no processamento e propriedades finais de telhas cer?micas." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/12772.
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Previous issue date: 2010-09-21This research presents an overview of the addition steelwork dust of ceramic shingles in order to contribute to the utilization use of such residue. The ceramic industry perspective in the Brazilian State of Piau? is quite promising. Unlike other productive sectors, the ceramic industry uses basically natural raw materials. Its final products are, in short, the result of transforming clay compounds. These raw materials are composed primarily of aluminum oxide, silicon, iron, sodium, magnesium, end calcium, among others. It was verified that steelwork dust is composed primarily of these same oxides, so that its incorporation in to structural ceramics is a very reasonable idea. Both clay and steelwork powder were characterized by AG, XRF, XRD, TGA and DTA. In addition, steelwork dust samples containing (0%, 5%, 10%, 15%, 20% and 25%) were extruded and burned at 800?C, 850?C, 900?C and 950?C. Then t echnological tests of linear shrinkage, water uptake, apparent porosity, apparent density and flexural strengthwere carried at. The results showed the possibility of using steelwork powder in ceramic shingles until 15% significant improvement in physical and mechanical properties. This behavior shows the possibility of burning at temperatures lower than 850?C, thus promoting a product final cost reduction
Neste trabalho ? estudado o efeito da adi??o da esc?ria de aciaria em massas cer?micas para ind?strias de cer?mica vermelha, visando contribuir com o aproveitamento desses rejeitos. Foi feito uma avalia??o da sua adi??o ? massa cer?mica para produ??o de telhas. O panorama da ind?stria cer?mica no estado do Piau? ? bastante promissor. Diferente de outros setores produtivos, o setor cer?mico utiliza, basicamente, mat?rias-primas naturais. O seu produto final ?, em suma, o resultado da transforma??o de compostos argilominerais. Essas mat?rias-primas s?o compostas, basicamente, de ?xidos de alum?nio, sil?cio, ferro, s?dio, magn?sio, c?lcio, dentre outros. Verificou-se que a esc?ria de aciaria ? composta principalmente por esses mesmos ?xidos, de forma que sua incorpora??o ? massa de cer?mica estrutural ? uma ideia absolutamente razo?vel. Foram caracterizadas as mat?rias-primas argila e esc?ria de aciaria por AG, FRX, DRX, TGA e DTA. Tamb?m foram conformados por extrus?o e queimados nas temperaturas de 800?C, 850 ?C, 900?C e 950?C corpos-deprova com 0%, 5%, 10%, 15%, 20% e 25% de teor de esc?ria de aciaria. Em seguida, foram realizados ensaios tecnol?gicos de retra??o linear, absor??o de ?gua, porosidade aparente, massa espec?fica aparente e resist?ncia mec?nica ? flex?o. Os resultados mostraram a possibilidade de se utilizar at? 15% de esc?ria de aciaria na massa cer?mica para telhas. At? essa dosagem, melhorias consider?veis nas caracter?sticas f?sicas e mec?nicas avaliadas foram observadas. O estudo tamb?m mostrou a possibilidade de queima em temperaturas mais baixas que 850?C, promovendo, assim, uma redu??o dos custos finais do produto
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Belfort, Gilson dos Santos. "A dinâmica socioespacial recente do município de Açailândia-MA." Universidade Federal do Maranhão, 2016. http://tedebc.ufma.br:8080/jspui/handle/tede/1489.
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GilsonSantosBelfort.pdf: 3480064 bytes, checksum: bc02e50ed9344a4c0797917758fe305a (MD5)Made available in DSpace on 2017-05-24T18:30:55Z (GMT). No. of bitstreams: 1 GilsonSantosBelfort.pdf: 3480064 bytes, checksum: bc02e50ed9344a4c0797917758fe305a (MD5) Previous issue date: 2016-06-14
This dissertational work is to analyze the recent socio-spatial dynamics of the municipality of Açailândia (MA), which was separated from the city of Imperatriz in 1981, and that in a short time of political emancipation, became one of the largest economic centers of the State of Maranhão, highlighting mainly in agriculture, with the highlight the cattle and the steel industry. In the construction of the dissertation, he tried to structure the same, taking into account the theoretical study of the categories territory and territoriality on the perspective of Economic Geography, from there we tried to understand the process of formation of the space of the city of Açailândia, then leaving for an analysis of the economic dynamics of the city, from the 1990s, when large enterprises were already actively working. Wanted also observe and analyze the impact of steel enterprises in the economic of the municipality and at the last moment to turn the attention to the study and analysis of the recent socio-spatial dynamics Açailândia.
O presente trabalho dissertativo tem por objetivo analisar a Dinâmica Socioespacial recente do município de Açailândia (MA), que foi desmembrado da cidade de Imperatriz no ano de 1981, e que em pouco tempo de emancipação politica, tornou-se um dos maiores polos econômicos do Estado do Maranhão, destacando-se principalmente no setor siderúrgico e na agropecuária, tendo como ênfase a bovinocultura. Na construção da dissertação, procurou-se estruturar a mesma, levando em consideração o estudo teórico das categorias território e territorialidade sobre a perspectiva da Geografia Econômica, onde se buscou entender o processo de formação do espaço geográfico do município de Açailândia, partindo então para uma análise da dinâmica socioeconômica do município, a partir da década de 1990, quando os empreendimentos siderúrgicos já estavam funcionando ativamente, e a agropecuária estava em evidencia nessa porção territorial do oeste maranhense. Procura-se ainda nesta pesquisa observar e analisar os impactos dos empreendimentos siderúrgicos na econômica do município, e no último momento a atenção volta-se para o estudo e análises da recente dinâmica socioespacial de Açailândia.
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Reichenwallner, Christopher, and Erik Tegevall. "Skivbytesrobotik i tuff miljö : Utvärdering och förslag på förbättringsåtgärder." Thesis, Uppsala universitet, Industriell teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-325064.
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Examensarbetet har utförts under 10 veckor i uppdrag av Outokumpu Stainless AB via Uppsala universitet. Outokumpus produktion i Avesta tillverkar rostfritt stål, där en del av det producerade stålet slipas för att få en finare yta och minska defekter. I sliphallen finns 8st slipmaskiner som alla måste servas med nya slipskivor när de gamla är nedslipade. Detta utförs av två robotar som automatiskt ska åka ut i sliphallen och byta ut de gamla slipskivorna. Problematiken ligger i dessa robotar, vars automation endast fungerar fullt ut ett fåtal av gångerna. Examensarbetet gick således ut på att utvärdera dessa robotar samt generera förslag på förbättringsåtgärder. En stor del av arbetet fokuserades på analys av den befintliga skivbytesprocessen. Efter att förståelse erhållits för dagens process utfördes undersökningar i syfte att finna de faktorer som orsakar stopp i automationen samt dess konsekvenser. Till sist genererades lösningsförslag vars syften är att öka andelen automatiska byten. De huvudsakliga orsakerna till stoppen i automationen grundar sig i processens utformning, dess krav på precision och att ett flertal komponenter måste harmoniera för att byten ska fungera automatiskt. Bortsett från processens utformning är smuts, slitage, ej anpassad reglering och bristande rutiner faktorer som sätter stopp för automationen. Konsekvenser av problemet är säkerhetsrisker, frustration, tidsförluster för operatörer och ekonomiska förluster. Den instabila skivbytesprocessen påverkar i dagsläget inte nödvändigtvis ledtider på produkterna, men tvingar operatörer att byta slipskivor för tidigt vilket resulterar i outnyttjade slipskivor. Att öka andel automatiska byten är möjligt men kräver mycket arbete. Rutiner är viktigt, särskilt angående linjering av slipmaskinerna, vilket är en förutsättning för att det ska fungera. Även utbyte av slitna komponenter, optimering av reglertekniken och mindre programändringar är lösningar till en ökad andel automatiska byten. För att minska kostnaden för outnyttjade slipskivor krävs det att processen kan utföras snabbare och utan att påverka produktionen. Om företaget ska implementera en alternativ lösning är det viktigt att denna lösning inte kräver att operatörer behöver befinna sig i sliphallen. Detta grundar sig i säkerhetsrisker och minskad produktionskapacitet. Lösningen bör vara adaptiv för att ej behöva förlita sig på linjerade maskiner eller snäva toleranser.This thesis in Mechanical engineering has been performed at the stainless steel manufacturer Outokumpu Stainless AB, through Uppsala University. At the company's production site some of the produced steel slabs are going through hot grinding in order to get the required surface finish, depending on the customer's demand on quality. There are 8 grinding machines in the grinding station, each of those needs to be provided with new abrasives when the old ones get to worn out. Two robots are installed to execute the abrasives change operation automatically, where each robot maintains 4 grinding machines, two coarse and two fine. This changing process is currently working fully automatically around one percent of the times which constitutes a problem. The thesis is about evaluation and improvement suggestions of this process, where the proportion of succeeded automatically replaced abrasives is in focus. A big part of the work has been based on analysing the existing process in purpose of understanding it fully. After enough knowledge about the process was achieved, investigations about the deficiencies of the process were conducted. Finally improvement suggestions were generated. The main cause of the automation failure is based on the process design and its precision requirements. The environment is tough and the forces are big which affects the process negatively. In addition there are a several components that need to harmonize in order for the abrasives replacement to work properly. Aside from the design of the process other critical factors are dust, component wear, deficient adapted regulation and lacking of alignment routines. Consequences of the failed automatically abrasive replaces are reduced safety, frustration among operators, time loss and economical losses. When the automation stops, the operators have to manually correct the errors alongside the grinding machines in the grinding area. The unstable processes does not necessarily affect the value-adding lead time but forces operators to change the abrasives too early which results in losses in form of non-fully utilized abrasives. Increasing the proportion of automatically fulfilled replaced abrasives is possible but requires much work. Routines are important, especially with alignment of the grinding machines which is a prerequisite for the process to succeed. Replacing of wear damaged components, optimizing the regulation and smaller programming changes are also solutions that contribute to an increasing proportion. To minimize the cost of unutilized abrasives the process is required to perform faster and without interfering with the production. If the company wants to implement a different solution in form of an investment it is important that the solution does not require operators to be inside the grinding area. This is based on safety issues, also the risk of interrupting the production and creating a bottleneck, which can be crucial under more demanding periods. The solution should be a faster, more adaptive system and should not have to rely on alignment and narrow tolerances.
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Chaudhry, Tariq M. "Biogeochemical characterization of metalliferous wastes and potential role of arbuscular mycorrhizae in their phytoremediation." Thesis, Campbelltown, N.S.W. : University of Western Sydney, Macarthur, Faculty of Informatics, Science and Technology, 1999. http://handle.uws.edu.au:8081/1959.7/442.
Full textAbstract:
Phytoremediation is an innovative technology employing plants for reclamation of soils that have been polluted by industrial contaminants. While it is frequently slower than traditional physicochemical remediation techniques, there are, however, many significant advantages including simplicity, low cost, improvement of soil structure and microbiological fertility. While various hyperaccumulators have been reported from Europe and the USA, there is a need to identify Australian species. This study reports a number of metal accumulators following a soil and vegetation survey of two metal contaminated sites in New South Wales, the spoil (filtercake) heaps of the BHP (Broken Hill Propriety ) steelworks at Port Kembla and the abandoned mine at Sunny Corner. BHP is the largest manufacturer of steel in Australia. The Port Kembla is the largest single steel manufacturing site. Solid by-products from this site totalled 3.1 million tons in 1988. The Sunny Corner mine site was mainly a silver mine which operated over approximately 100 hectares 1184 to 1922 and produced over 100 tonnes of silver during that period. The soil and water in and around the site is heavily contaminated with metals and is distinctly acidic. It was concluded that Ricinus communis, Sonchus oleraceus, baeckea utilis, Poa labillardieri and Pinus radiata are options for heavy metal phytoremediation of contaminated Australian soils. Arbuscular Mycorrhizal infection (particular with Glomus and Gigaspora strains) should be promoted for optimum growth.
31
Lam, Dennis, T. C. Ang, and S. Chiew. "Structural Steelwork: Design to Limit State Theory." 2009. http://hdl.handle.net/10454/5624.
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Lam, Dennis, T. C. Ang, and S. P. Chiew. "Structural Steelwork: Design to Limit State Theory." 2003. http://hdl.handle.net/10454/5618.
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This classic textbook is a comprehensive introduction to structural steelwork design. It describes the design theory and code requirements for common structures, connections, elements and frames.
The book is structured to meet the needs of courses in structural steelwork, introducing and explaining each concept before allowing the student to test the knowledge with practical examples. Each section is illustrated with exercises for the student to reinforce their learning. It continues to be an indispensable introduction to structural steelwork design for students of structural and civil engineering.
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Lam, Dennis, T. C. Ang, and S. P. Chiew. "Structural Steelwork: Design to Limit State Theory." 2014. http://hdl.handle.net/10454/10720.
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NoThe fourth edition of Structural Steelwork: Design to Limit State Theory describes the design theory and code requirements for common structures, connections, elements, and frames. It provides a comprehensive introduction to structural steelwork design with detailed explanations of the principles underlying steel design.
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Krige, Geoffrey Jack. "The Behaviour And Design Of Mineshaft Steelwork And Conveyances." Thesis, 2015. http://hdl.handle.net/10539/17835.
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An investigation into the dynamic forces between shaft
steelwork and conveyance is described. The investigation
involves both a computer model, which differs from other
models in incorporating some flexibility into the conveyance,
and field measurements. It is the first time
to our knowledge that measurements of conveyance wheel
loads and accelerations have been made in a wide range
of different shafts. The results of the computer model
and the measurements are analysed to give an assessment
of the magnitude of the forces and of those variables
which have a major influence on the forces.
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Lam, Dennis, K. S. Elliott, and D. A. Nethercot. "Interaction between hollow cored floor slabs and structural steelwork." 1995. http://hdl.handle.net/10454/5534.
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Lam, Dennis, T. C. Ang, and S. P. Chiew. "Structural Steelwork: Design to Limit State Theory, Turkish translation = Çelik Yap¿lar: S¿n¿r De¿er Teorisine Dönük Tasar¿m." 2005. http://hdl.handle.net/10454/5617.
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Lam, Dennis. "Steel Concrete Composite and Hybrid Structures." 2009. http://hdl.handle.net/10454/5623.
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Fotopoulos, Mihail. "An experimental study of the dynamic loading on mineshaft steelwork with particular reference to fatigue loading." Thesis, 2015. http://hdl.handle.net/10539/17267.
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Tsai, Po–Wen, and 蔡博文. "Petrifies the factory to steelwork structural,the examination, the fire protection safety importance and the countermeasure." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/37563157007150386574.
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碩士國立高雄應用科技大學
機械與精密工程研究所
102
This article is expands take Miaoli County share town China photochemistry industrial exploitation limited liability company CPL produces in the special case the pipe support addition and old has the pipe support to make up as the main research, by namely has the pipe support load bearing weight to make up strongly, increases the pipe support whether or not to set up in the existing land, has the question and the personnel in the scene practice operation the anxiety which executes does produces, is having the pipe support to propose old the improvement plan, with subscribes decides the standard work flow, the purchase standard, the inspection standards, the fire safe protection and so on, and actual putting to application. Statistics the question and the personnel which produces in the scene practice operation the anxiety which executes does produces may divide into roughly: 1. Scenes supervise work and engineer are not understood very much to the steel structure that, is at condition which smatters. 2. Because is petrifying the factory, is mostly the operator and chemistry background personnel, as soon as also is in to the steel structure knows half solution, easy to let the scene worker have misleading. 3. Had the pipe support not to use for many years old and makes up strongly, whether had does not compare the load use phenomenon. In view of this condition proposed some have the pipe support to make up the strong plan old, promotes the service life; And to increases the steel structure to the earthquake, the wind power and the service life biggest limit passes in review as follows: 1. Increases has the pipe support to support the strength and the intensity old. 2. Prevented has the pipe support, the additional pipe support corrosion, the fire injury, the artificial destruction old. 3. Subscribes decides the standard work flow, the purchase standard, the inspection standards, the fire safe protection standard. 4. Pair of factories the personnel makes the education and training, enable to have certain understanding to the steel structure. This research effect is to the steelwork structural, the examination, the fire protection obtains outside safely the biggest protection, also can has a standard to the personnel service and the application method to be possible to follow, because in addition subscribes decides the standard work flow, the purchase standard, the inspection standards, the fire safe protection may cause the company overall transport business achievements to produce greatest being of help.WR DO
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Hsieh, Chung-Ming, and 謝宗敏. "A System Dynamics Approach To The Study of Performance Conflict between Production and Sale --A Steelwork Factory Case Study." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/75156693613948394192.
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碩士國立高雄第一科技大學
營建工程所
92
ABSTRACT Within a company individual department always struggle to achieve its own goal. However it is not unusual that the independent efforts from different departments are likely to form conflicts and endanger the success of the company. This research collected two years’ data regarding the production and sales departments of a steelwork factory in Taiwan, and studied the interactions among the departments and factory by System Dynamics (SD). A system dynamics model was successfully constructed to represent the real world situations. Based the real-data-based scenario, the simulated results shows that when each department strives to achieve its own goal, the overall profit decreased. It is shown that the developed SD model can effectively represent the implicit structure of the business flow and help manager understand the hidden problem as well as improve the quality of decision making.
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Lin, Yu-Chieh, and 林猷傑. "The Precise Alignment of Large Structure －Using the Precise Alignment of Tandem Cold Rolling Mill in Steelwork as an Example." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/41788909753435533228.
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碩士國立成功大學
測量工程學系
85
Owing to much public or private economical andengineering activities in Taiwan, there should be many needs on precise alignment and installation for large construction objects. But professional surveyors in Taiwan seem to participate in these project very rarely. The reason may be that people in the field of machinery and civil engineering don't know what surveying can do for their works. Furthermore, surveyors in Taiwan seem to pay less attentions on their needs. Therefore, the real application aspects are less understood.The alignment of TCM (=tandem cold rolling mill) in steelwork is an application case for large mechanisms. The related works are done in a larger area and need high accuracy. From the surveying point of view, there exists something to be considered or improved, e.g. about operational approaches and methods of layout design and alignment as well as successive monitoring, which are controlled or executed by professional mechanist at present.In this thesis, the operational procedures for the TCM-alignment are examined exactly. The principle of network design in engineering survey, data processing methods and quality estimation techniques are used in the network design and analysis for the TCM-alignment. Comparing with surveying methodology adopted in some precise alignment of large mechanical constructions and considering the available instruments at present, some improvement plans are proposed. Applying statistical tests to the deformation analysis of monitoring network, a rigorous way is applicable for the installation and monitoring of TCM.On the other hand, some suggestions are offered for a good cooperation between mechanical engineering and surveying. It is expected that the concerned surveys about the precise alignment of large mechanical equipment will be done more efficiently.
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Zhang, Kun. "Modeling and control of mechanical impact on the spindles of hot steel rolling mill." 2002. http://arrow.unisa.edu.au:8081/1959.8/45757.
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Spindle failure during fast steel rolling is one of the major equipment failures encountered at Onesteel Whyalla Steelworks (WS). Spindle failure whilst infrequent has been occurring over a long period of time and is a significant cost impost in terms of replacement parts, repair and lost production. Previous attempts at mechanical analysis and spindle redesign have not rectified the problem. This thesis presents an in-depth investigation of the problem and uses a completely new approach, modeling and control, to obtain a solution to the problem.
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朱霏淩. "A Case Study of Steelworks Firm in Perspective of Intrapreneurship." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/27283841426362181307.
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