Dissertations / Theses on the topic 'Metallurgical coke'
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Moreland, Angela. "The structure and strength of metallurgical coke." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/13759.
Full textWalker, Alan. "The carbon texture of metallurgical coke and its bearing on coke quality prediction." Thesis, Loughborough University, 1988. https://dspace.lboro.ac.uk/2134/10950.
Full textSato, Hiroshi. "Strength of metallurgical coke in relation to fissure formation." Thesis, Loughborough University, 1999. https://dspace.lboro.ac.uk/2134/8350.
Full textIsmail, Mohamed. "An investigation into the use of petroleum coke as a substitute for metallurgical coke." Thesis, University of Nottingham, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.663253.
Full textGIGLIO, ANDRE MALICIA. "QUALITY PREVISION MODEL OF METALLURGICAL COKE TO BE USED ON BLAST FURNACES USING A COKE TEST FACILITY." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=29703@1.
Full textCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
É bem conhecido o alto peso que o coque representa no custo final do ferro-gusa, além do que, as suas propriedades estão intimamente ligadas à performance dos altos-fornos. Portanto, buscar uma qualidade do coque compatível com as necessidades do alto-forno e com o menor custo possível, se transforma em uma tarefa difícil senão se dispuser de ferramentas que permitam uma correta seleção de carvões e testes prévios em fornos pilotos. Dentre as propriedades utilizadas pelos altofornistas para qualificar o coque, se destacam a CSR - resistência mecânica após reação com CO2, e a CRI - índice de reatividade, por serem, respectivamente, uma medida direta da reação de Boudouard - solution loss, e da associação desta com a resistência do coque. Com isso se torna possível prever o consumo desta matéria prima nos altos fornos e, devido a sua grande influência nos custos da operação, mensurar seu impacto na economicidade do processo. A unidade de coqueificação do processo heat recovery da ThyssenKrupp Companhia Siderúrgica do Atlântico - TKCSA, possuindo uma concepção diferente do tradicional by product coking process, utiliza um forno piloto próprio, especificamente projetado pela empresa, com o qual se procura simular as condições operacionais das unidades de coqueificação. Entretanto, essa unidade de coqueificação ainda carecia de um estudo experimental especifico capaz de permitir uma análise comparativa confiável entre o coque produzido e o das baterias industriais. O objetivo principal desta dissertação foi desenvolver um modelo de previsão da CSR -resistência mecânica do coque após reação com CO2, e do CRI através da coqueificação de misturas de carvões, obtidas por diferentes metodologias, em no forno escala piloto e sua comparação estatística com os dados obtidos em escala industrial na ThyssenKrupp Companhia Siderúrgica do Atlântico - TKCSA. O modelo de previsão para o CSR quando obtido através de escala piloto se mostrou bastante aderente aos dados obtidos em escala industrial. Portanto, os procedimentos utilizados e este modelo desenvolvido mostraram-se adequados, e podendo assim ser usados como ferramenta para auxiliar na seleção e compra de carvões.
It is well known that coke has a major importance on the final cost of the Hot Metal and besides this fact its properties are closely connected with the performance of blast furnaces. Therefore, seeking a type of coke compatible with the blast furnace technical requirements and at the lowest possible price may become a hard challenge if neither a prediction tool is available to accomplish a correct selection of coals nor previous test were made on coke test facility. Among the properties used by the Blast Furnace specialists to qualify the coke, it can be highlighted CRI - Coke Reaction Index and CSR - Coke Strength after Reaction with CO2, because they represent a direct measure of the Boudouard reaction – solution loss, and its association with the coke strength, respectively. Based on them it is possible to predict the consumption of this raw material in the Blast Furnaces and, due to its high influence on the operational costs, measure its impact on the overall process economy. The Coke Plant unit at thyssenkrupp Companhia Siderurgica do Atlantico - TKCSA follows the coking process known as heat recovery and its concepts differ from the traditional one, by product. This unit uses its own coke test facility, specifically designed by the company s experts to simulate the operational conditions at the coke plant industrial furnaces. However, the coke test facility still required further specific experimental study capable of making a reliable comparison analysis between the cokes produced in it with the one from the industrial coke batteries. The main goal of this dissertation is to develop model to predict the CRI - Coke Reaction Index and CSR - Coke Strength after Reaction with CO2, through the coking process of coal blends, generated by different methodologies, charged on the coke test facility statistically compared with the ones from the industrial Coke plant at thyssenkrupp Companhia Siderúrgica do Atlântico - TKCSA. The prediction of CSR represented when generated through the coke test facility showed good adherence with the values obtained with the industrial scale. Therefore, the current procedures used on the developed model has proved to be adequate and may be used as a predicting tool to help the purchase of coals.
Daw, E. R. "A study of some structural features relevant to the degradation of metallurgical coke." Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/12641.
Full textAhmad, Yousef. "Oxidation of Graphite and Metallurgical Coke : A Numerical Study with an Experimental Approach." Thesis, KTH, Materialvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-193604.
Full textChapman, Michael Wallace. "Insoluble oxide product formation and its effect on coke dissolution in liquid iron." School of Mechanical, Materials and Mechatronic Engineering - Faculty of Engineering, 2009. http://ro.uow.edu.au/theses/3039.
Full textGoncalves, e. Oliveira Fernando Lucas. "Étude des Matériaux carbonés utilisés comme réducteurs pour la production des alliages de manganèse dans le four électrique." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2010. http://www.theses.fr/2010ECAP0008/document.
Full textThe main aims of our work have been to establish criteria useful for reductant selection, using coke reactivity to CO2 as the main parameter for reductant quality assessment and, from a fundamental point of view, to develop a better understanding of carbon reactions inside the industrial reactor. Therefore, Boudouard reaction has been studied on three increasing scales: intrinsic chemical reaction, coke lump, and coke bed scales. Several different types of carbonaceous materials have been studied. They represent the variety of reductants commonly used in the production of manganese ferroalloys in the electric furnace. It has been shown that this extended range of reductants introduces large differences between their characteristics, mainly between their reactivity to CO2. Regarding the coke lump gasification kinetics, the Langmuir-Hinshelwood model has been used to represent the intrinsic rate of the Boudouard reaction. A good correlation has been found between the initial gasification rates of the coke beds and the single coke lumps. The difference between these rates increases with increasing reductant reactivity. It is possible to determine coke gasification regime inside the industrial electric arc furnace using single particle and coke bed gasification models. The overall rate at which coke reacts with CO2 inside the industrial reactor is probably limited by the intrinsic chemical reaction. Therefore, a reactivity index, based on the initial gasification rate of the reductant, measured in the chemical-kinetics controlled regime, seems to be adapted to the reductant quality assessment. An additional technique could be the microtextural analysis
Han, Bing. "Studies of metallurgical coke behaviour and properties under conditions relevant to the bosh and deadman regions of a blast furnace." Thesis, Loughborough University, 1993. https://dspace.lboro.ac.uk/2134/28134.
Full textDong, Shanning. "Development of analytical methods for characterizing metallurgical coke and the injectant coal chars, tars and soots formed during blast furnace operation." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/1329.
Full textOrellana, Daniel Rigon. "Incorporação de moinha de carvão vegetal na produção de coques em forno piloto." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/158269.
Full textThe reuse of waste materials and its destination are challenges continuously faced for industry. For being far-flung and apply a huge variety of process, raw materials and inputs, the steel supply chain benefits from having a high flexibility and many possibilities of reintroducing compounds in its manufacturing route. For example, carbonaceous materials can be used partially in coal blends for cokemaking process depending on particle size and chemical composition. The current work aimed to evaluate the influence of adding fine charcoal to a coal blend for coke production in a pilot oven and to determine the maximum content tolerated for the blend, assessing coke quality parameters. For this, a eucalyptus charcoal residue was introduced in two different size distributions, one composed of coarser particles (fraction G) and another of finer (fraction F), and characterized together with the coal blend used. Afterwards, the cokes produced in pilot oven were also characterized through several analyzes: proximate, ultimate, surface area, porosity, optical texture, reactivity on thermobalance, CRI/CSR e DI150/15. The results achieved showed that the insertion of charcoal on fraction G compromised less the quality parameters of cokes with charcoal. Contents up to 3% of charcoal were tolerated for this particle size distribution while for fraction F, only 1%. Another point noticed was that the coke produced with charcoal addition had no significant drop on sulfur content, with the exception of the coke sample with 10% of charcoal and fraction G. In all samples with charcoal it was also possible to see an increase on surface area in relation to the reference coke. The dynamic thermogravimetric tests also provided relevant information regarding to the temperatures and apparent reaction rates of cokes made with charcoal.
Hanson, Svenja. "Interfaces between the textural components in metallurgical cokes." Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/28121.
Full textYu, Xin. "Thermodynamics and kinetics of gasification reactions of metallurgical cokes." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47320.
Full textGrigore, Mihaela Materials Science & Engineering Faculty of Science UNSW. "Factors influencing coke gasification with carbon dioxide." 2007. http://handle.unsw.edu.au/1959.4/40623.
Full textMkhatshwa, Sindile Francisca. "Assessment of the mineralogical variability of the A1, UE1A, and A5-reefs at Cooke Section, Rand Uranium, using MLA-based automated mineralogy." Thesis, 2012. http://hdl.handle.net/10210/6347.
Full textThis study focuses on the mineralogical variability of the A1, A5 and UE1A Elsburg reefs, obtained at Rand Uranium’s underground mining areas. A total of 133 reef samples, consisting of the Elsburg UE1A, A1 and A5-reefs have been obtained from Cooke 2 and 3 (two of the three Rand Uranium Mines) using the conventional chip sampling method. One of the challenges faced by Rand Uranium Gold Mines in the Cooke section area is the difficulty in differentiating between the various reef types by means of their macroscopic characteristics (colour, pebble types/sizes/shapes, sorting, matrix type, visible sulphide mineralization etc.). This difficulty led to this study which is aimed at utilizing mineral liberation analyzer (MLA)-based automated mineralogy to distinguish between the various reefs and to assess the mineralogical variation within the A1, A5 and UE1A-reefs. The mineralization in this area is hosted by the upper Central Rand Group of the Witwatersrand Supergroup. The main orebodies that are exploited at the mines occur within the Gemsbokfontein Member of the Elsburg Formation. These orebodies have been deformed into an east-west trending anticline at Cooke 3. The present study also attempts to prove or disprove the equivalence of the UE1A-reef on the western limb of the anticline to the A1 or A5-reefs on the eastern limb of the anticline on the basis of mineralogy. Representative splits of the samples were subjected to mineralogical abundance quantification as possible through quantitative MLA-based modal abundance protocols such as XMOD. A standard file on the various mineralogical phases encountered, was created on the 600F MLA and complemented by quantitative XRD (X-ray diffraction) data. Mineral abundances were quantified by MLA, based on integrated backscatter electron (BSE) images and energy dispersive spectrometry (EDS) analyses. Thirty one minerals have been detected using the MLA and they include phases such as quartz, pyrophyllite, chlorite, brannerite, gold, monazite and pyrite as well as minor unknown minerals. Only a few of the minerals are relatively more abundant within the reefs while the majority occurs in very low abundance. Albite, chlorite, muscovite, pyrite, pyrophyllite, quartz, uraninite and zircon are relatively more abundant than the rest of the minerals.