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Добірка наукової літератури з теми "Production scrap"

Автор: Grafiati

Опубліковано: 7 грудня 2024

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Статті в журналах з теми "Production scrap"

Xiao, Pengcheng, Chao Wang, Liguang Zhu, Wenguang Xu, Yuxin Jin, and Rong Zhu. "An Efficient and Accurate Quality Inspection Model for Steel Scraps Based on Dense Small-Target Detection." Processes 12, no. 8 (August 14, 2024): 1700. http://dx.doi.org/10.3390/pr12081700.

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Анотація:

Scrap steel serves as the primary alternative raw material to iron ore, exerting a significant impact on production costs for steel enterprises. With the annual growth in scrap resources, concerns regarding traditional manual inspection methods, including issues of fairness and safety, gain increasing prominence. Enhancing scrap inspection processes through digital technology is imperative. In response to these concerns, we developed CNIL-Net, a scrap-quality inspection network model based on object detection, and trained and validated it using images obtained during the scrap inspection process. Initially, we deployed a multi-camera integrated system at a steel plant for acquiring scrap images of diverse types, which were subsequently annotated and employed for constructing an enhanced scrap dataset. Then, we enhanced the YOLOv5 model to improve the detection of small-target scraps in inspection scenarios. This was achieved by adding a small-object detection layer (P2) and streamlining the model through the removal of detection layer P5, resulting in the development of a novel three-layer detection network structure termed the Improved Layer (IL) model. A Coordinate Attention mechanism was incorporated into the network to dynamically learn feature weights from various positions, thereby improving the discernment of scrap features. Substituting the traditional non-maximum suppression algorithm (NMS) with Soft-NMS enhanced detection accuracy in dense and overlapping scrap scenarios, thereby mitigating instances of missed detections. Finally, the model underwent training and validation utilizing the augmented dataset of scraps. Throughout this phase, assessments encompassed metrics like mAP, number of network layers, parameters, and inference duration. Experimental findings illustrate that the developed CNIL-Net scrap-quality inspection network model boosted the average precision across all categories from 88.8% to 96.5%. Compared to manual inspection, it demonstrates notable advantages in accuracy and detection speed, rendering it well suited for real-world deployment and addressing issues in scrap inspection like real-time processing and fairness.

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Baah, Owusu Panin Kwame. "Innovative Use of the Pointillism Technique for the Production of Scrap Metal Mural Art of Kofi Annan for Environmental Sustainability." Journal of Innovations in Science and Technology 1, no. 1 (April 27, 2023): 60–78. http://dx.doi.org/10.60129/jinces.v1i1.00523.

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Scrap metals have been an environmental nuisance blocking the pathways of water and leading to various forms of environmental pollution at Anloga in the Kumasi Metropolis of Ghana. This scrap metal art project was aimed at creatively reusing and re-purposing scrap metals from various construction, dump sites and households for the creation of a metal artwork as a step in reviving scrap metal art for environmental sustainability. Over the years, murals have been made using various techniques in painting and sculpture. The studio-based research design that employs the qualitative descriptive method was used for this project. The project adopted the concept of pointillism whereby tiny dots in various pure colours are used in creating an artwork that is appreciated when viewed from a distance. We replicated this concept by representing the dots with metal domes from scrap metals in producing an innovative commemorative metal mural of the former UN General Secretary, Kofi Annan. The researchers employed participant observation and used photographs to collect the data by carefully studying the various scrap metals that were available for the project and by utilizing most metal working techniques. It was very necessary to carry on this project to revive scrap metal art in Ghana which is gradually dying out. The study revealed that recycling and melting of metal scraps should be done in kilns and furnaces rather than in open hearth processes for best results. The study recommends the exploration of other methods of doming in the future for much efficiency. Also, the study recommends the exploration of other fine art techniques and media using various scrap metals for artistic production.

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Cui, Ji Rang, Wei Guo, Hans Jørgen Roven, Qu Dong Wang, Yong Jun Chen, and Tao Peng. "Recycling of Aluminum Scrap by Severe Plastic Deformation." Materials Science Forum 667-669 (December 2010): 1177–82. http://dx.doi.org/10.4028/www.scientific.net/msf.667-669.1177.

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The production of primary aluminum is an energy costly process. With the global warming being of concern, the secondary aluminum stream is becoming an even more important component of aluminum production and is attractive due to its economic and environmental benefits. Recycling of aluminum by new solid state recycling techniques instead of conventional remelting and subsequent refining processing can result in significant energy savings. Severe Plastic Deformation (SPD) techniques have been applied for consolidating nano particles into fully dense materials with good mechanical properties. However, solid state recycling of scraps by SPD is only in the beginning. In the present study, degreasing of aluminum chips from the machine workshop was investigated by a thermal method and chemical treatment. Thereafter, the decoated chips were recycled by Cyclic Extrusion Compression (CEC) at deformation temperatures between 400 and 500 °C. The microstructure and mechanical properties of the recycled aluminum scrap processed by SPD were subsequently investigated. The results show that SPD technology provides a promising alternative for recycling of aluminum scrap. Thermal degreasing of aluminum scrap resulted in more oxidization of aluminum scrap particles. Visible interfaces between chips were observed even at a low magnification.

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Ah-lung, Guillaume, Ayyoube Barchid, Brahim Boubeker, Youssef Samih, Jones Alami, Sanae Baki Senhaji, and Johan Jacquemin. "Effects of Melting/Casting and Thermal Treatment Surrounding Gas Phase Composition on the Properties of a Low-Alloyed Steel." Metals 14, no. 12 (November 21, 2024): 1317. http://dx.doi.org/10.3390/met14121317.

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This study aims to provide insights into the experimental conditions used during the melting/casting process and subsequent thermal treatments of low-alloy steels, particularly regarding recycled scrap metals. As sustainable practices in metallurgy gain importance, optimizing scrap metal recycling is crucial for producing steel grades with desired chemical compositions, microstructures, and physical properties. Understanding these conditions is vital for enhancing the efficiency and quality of steel production from recycled materials. This study emphasizes the critical role of specific experimental conditions in the steelmaking process, especially with recycled scrap metals. It closely examines the atmosphere during melting/casting to identify key parameters that must be rigorously controlled in lab-scale steel production using a vacuum induction furnace. The findings indicate that both the chemical composition and recyclability of low-alloyed steels are significantly influenced by the surrounding atmosphere during melting and casting. Inert environments, such as vacuum or argon, are shown to be ideal for steelmaking with induction technology, particularly when recycling scrap metals. Additionally, this study highlights the importance of precise heat treatments, including homogenization and normalization, by controlling both thermal conditions and the atmosphere to produce high-quality steel from recycled scraps.

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Parvez, Dr Y. Aboobucker, and S. Harsavardini. "TYPES OF MANUFACTURING OF BIOGAS - With design thinking approach." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 07, no. 09 (September 1, 2023): 1–11. http://dx.doi.org/10.55041/ijsrem25733.

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This article examines the reputation of biogas education in different ways. It can be made from scrap paper and its mixture with cow dung. It can be made from food scraps. It can also be made from natural waste streams or industrial methods. The ability to grow sweet sorghum with unique row spacing (20, 50, 75 cm) in small-scale plots with three varieties is also used for biogas production. exclusive types of small-scale and large-scale production are mentioned. Keywords- Cow dung, Food scraps, Natural waste stream,Small-scale production,Large-scale production

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Dini, Wahyuni, Budiman Irwan, and Tambunan Mangara. "Alternative Selection in Reducing Wood Scrap with Green Productivity Approach." E3S Web of Conferences 73 (2018): 07023. http://dx.doi.org/10.1051/e3sconf/20187307023.

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This research was conducted in companies engaged in the production of furniture in North Sumatra. From observations made, seen piles of scrap pieces of wood from the rest of the production. This study was conducted to select the best alternative to reduce scrap wood with green productivity approach so that productions are going to more economical and productive. Green productivity approach to the reduction of scrap is performed by calculating Green Productivity Index. There are 3 alternative wood scrap reduction, which is: (1) Do not perform any conversion actions; (2) Wood scrap smoothed and pressed into the pressed wood as the “content” of the door, wood scrap that is usually used as a fuel in the boiler is replaced with oil palm pulp; and (3) Purchase the woods with appropriate size and produces scrap as minimum as possible. Alternative 2 was selected as the best alternative to the Green Productivity Index (GPI) Human amounted to 1, GPI Material 1.13, GPICapital1.06, GPI Energy at 1.16, and GPI Waste of 0.

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Chiu, Yuan-Shyi P., Zhong-Yun Zhao, Fan-Yun Pai, and Tiffany Chiu. "Investigating the collective impact of postponement, scrap, and external suppliers on multiproduct replenishing decision." International Journal of Industrial Engineering Computations 14, no. 1 (2023): 147–56. http://dx.doi.org/10.5267/j.ijiec.2022.9.001.

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This study examines the collective impact of postponement, scrap, and subcontracting standard components on the multiproduct replenishing decisions. Rapid response, desirable quality, and various goods guide the client’s demands in today’s competitive market. Therefore, many manufacturing firms search for alternative fabrication and outsourcing strategies during the production planning stage to satisfy the client’s expectations, minimize fabrication-inventory costs, and smoothen machine utilization. To effectively help producers meet today's client's needs and enhance their competitive advantage, we develop a two-stage multiproduct replenishing system incorporating scraps, standard parts subcontracting, commonality, and delayed differentiation. To reduce the production uptime, stage one has a hybrid fabrication process for the common components (i.e., a partial outsourcing strategy), and stage two manufactures the finished multiproduct. In-house fabrication processes in both stages are imperfect; a screening process detects and removes scraps to maintain the finished batch quality. We determine the cost-minimized operating cycle. The findings reveal the collective impact of postponement, scrap, and external suppliers on this multi-product replenishment problem and can be used to facilitate production planning and decision-making.

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Mirgorodskaya, A. G., M. V. Shkidyuk, N. N. Matyukhina, and T. A. Don. "Modern technologies for utilizing tobacco wastes." Proceedings of the Voronezh State University of Engineering Technologies 80, no. 3 (December 17, 2018): 259–64. http://dx.doi.org/10.20914/2310-1202-2018-3-259-264.

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The problem of utilization or recycling industrial tobacco wastes is an important problem for tobacco industry. Economically preferable way for utilizing industrial tobacco wastes (tobacco scrap) is production smokeless products and hookah blends as wastes are utilized without special treatment. Monitoring of humidity and fractional composition of cut tobacco taken from tobacco rod/cigarette spoilage (tobacco scrap) is carried. Its long-term storage leads to increasing scrap and dust quantity. Researches on utilizing tobacco scrap for sniff and hookah blend production, which are considered to be less harmful compared to cigarettes, were carried. Chemical composition of American type tobacco and scrap was defined. Nicotine content varies from 0.9 to 2.4% and carbohydrates content – from 5.6 to 9.6%. Experimental samples of hookah blend were produced and their organoleptic and taste evaluation were carried. It was found that utilization of tobacco scrap is economically efficient for hookah blend production, as quality of final product made of leaf tobacco and tobacco scrap is similar. Experimental samples of sniff tobacco were produced in order to discover possibility of utilization industrial tobacco scrap for manufacturing this product. Consumer’s properties of sniff tobacco were evaluated by 100 points tasting protocol. This technology for sniff tobacco production from tobacco scrap allows manufacturing product of good quality, decreasing technological operations, rejecting stages of tobacco selection and its cutting and as the result decreasing cost of final product. The results of the research on utilizing tobacco scrap for hookah blend and sniff tobacco production proves optimality of recycling the tobacco wastes.

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Chuchot, Natthawat, and Purit Thanakijkasem. "Production Optimization of Premium Food Can with Distortion Printing under Waving Requirement." Applied Sciences 14, no. 16 (August 22, 2024): 7399. http://dx.doi.org/10.3390/app14167399.

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Анотація:

This research aims to propose a novel approach for evaluating and minimizing scraps in an industrial production of premium food cans with distortion printing. Beyond conventional formability criteria, a waving requirement is introduced to ensure aesthetic quality of the printed graphics. The research focuses on real production conditions, specifically involving double-cold-reduced (DR) low-carbon steel sheets and chromium-coated tin-free steel with a thickness of 0.16 mm. The sheets are laminated on both sides with a plastic film prior to undergoing distortion printing on the exterior. Subsequently, a blank is subjected to a drawing-redrawing process to form a food can. To address challenges associated with characterizing these thin sheets, a material parameter identification method is proposed and demonstrated. The thickness profile and flange length are identified as key criteria for this identification process. Measurements of thickness distribution and flange length are obtained using digital image correlation (DIC) and microscopy techniques. Within the manufacturing system, uncertainties related to material properties and forming processes can result in scraps or defects. To analyze these processes, finite element analysis (FEA) is employed and validated through experiments. For the evaluation of scrap rates, uncertainty propagation is conducted using a metamodeling technique, specifically employing radial basis function (RBF) neural networks. The study concludes by offering process optimization recommendations aimed at reducing the scrap rate.

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Puspita Sari, Diana, Sela Tri Parwati, Dyah Ika Rinawati, and Purnawan A. Wicaksono. "Analysis of Scraps Cause of Noodle Production in PT. Indofood CBP Success Makmur Tbk. using Fault Tree Analysis Methods." SHS Web of Conferences 49 (2018): 02012. http://dx.doi.org/10.1051/shsconf/20184902012.

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Анотація:

Food industry can survive when they can improve the productivity to meets the customer needs. PT Indofood CBP Sukses Makmur Noodle Division is one of food industry in Indonesia. Based on the production data of PT Indofood CBP Sukses Makmur Noodle Division Cibitung plant 3, found that the number of scrap noodles is almost always above the company minimum limit. This condition causes the company losing a profit of about 1.3 million per day per line. Based on these problems, this study aims to find the root causes of scraps of noodles production, then provide the advice on prevention of high amount of scrap of noodle production. The method used in this research is Fault Tree Analysis (FTA) and Five Step Plan analysis. The result of FTA analysis shows the cause of the high scrap of noodle production is the number of blocks noodles that fall as it passes through the conveyor in the frying and packing process, and because the operator less observant in connects the spice etiquette, less thorough to set the speed of the autoloader engine, less careful in case of handling the noodles. Suggested solutions include the implementation of 'seiri' by sorting reject spice oil and spices; 'seiton' by placing rolls of etiquette in easily reach place by the operator; 'seiko' by discarding etiquette, spices, and spiced oils into their respective containers; 'seiketsu' which is the division of responsibility for cleanliness of each operator; and 'shitsuke' ie routine briefing based on schedule.

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Більше джерел

Дисертації з теми "Production scrap"

Herraiz, Lalana Enrique. "Production of sintered NdFeB magnets from scrap alloy powders." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7609/.

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Анотація:

Rare earth metals are at highest supply risk of all metals for clean technologies due to supply restrictions. Rare earth elements are essential for the highest energy permanent magnets which are used in high-tech green applications such as wind turbines and electric motors. This rare earth 'crisis' has been addressed by many authors by reducing or substituting the rare earths for less critical elements. The focus of this thesis, however, is on recycling of rare earth magnetic materials. Previous work has been focused on recycling NdFeB by re-sintering and blending alloying elements to improve the final magnetic properties. However, none of these studies have addressed the systematic addition of alloying elements or the particle size effect on the final magnetic performance of the recycled magnet. The work in this thesis is aimed at maximising the magnetic performance of recycled NdFeB magnets by investigating the effect of the manufacturing route and the influence of adding alloying elements. Uncoated end-of-life sintered NdFeB were exposed to hydrogen at room temperature to break them down into a friable powder; which was then milled, sieved, aligned, pressed and sintered into recycled magnets. The resulting magnets were tested on a permeameter at room temperature, 75 and 150oc to measure the magnetic properties. Scanning electron microscopy was used to assess the microstructures. Mechanical properties such as Vickers hardness and fracture toughness were also studied.

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Seyedali, Seyed Mohamad. "Getting a Grip on Scrap : Applying Probability and Statistics in Analyzing Scrap and Steel Composition Data from Electrical Steel Production." Thesis, KTH, Materialvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-165413.

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This study intends to better control the final composition of steel by trying to have a better knowledge of elements including copper, nickel, molybdenum, manganese, tin and chromium in the scrap. This objective was approached by applying probability and statistical concepts such as normal distribution, multiple linear regression and least square and non-negative least square concepts. The study was performed on the raw materials’ information of Ovako Smedjebacken and Ovako Hofors, two steel production plants in Sweden. The information included but were not limited to the amount of the different scrap types used in the charge, total weight of the charge and the final composition of the produced steel. First, the concept of normal distribution was used as to consider the variations of the alloying elements between the estimated and measured alloy contents. The data were then used to consider a model for distribution factor of the studied elements. Also, an estimation of the alloy contents in the scrap type given the final steel composition was carried out using the concept of probability and statistics. At the end, a comparison of the results from the different concepts was done.

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Owais, Ashour A. [Verfasser]. "Packed Bed Electrolysis for Production of Electrolytic Copper Powder from Electronic Scrap / Ashour A Owais." Aachen : Shaker, 2003. http://d-nb.info/1181600782/34.

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Owais, Ashour [Verfasser]. "Packed Bed Electrolysis for Production of Electrolytic Copper Powder from Electronic Scrap / Ashour A Owais." Aachen : Shaker, 2003. http://d-nb.info/1181600782/34.

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Tavera, Ruiz Claudia Patricia. "Experimental study of the aromatics production from the pyrolysis of scrap tire rubber using heteropolyacids-based catalysts." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10075/document.

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Les pneus de caoutchouc usagés sont l'une des plus grandes productions annuelles de déchets dans le monde entier. Ceci est dû à leur composition non biodégradable, leur durée de vie et leur traitement difficile, ce qui provoque des problèmes environnementaux et de santé publique, en raison de son accumulation et de la mise en œuvre de techniques de traitement inappropriées. En tenant compte de ce problème, il est envisageable de chercher à valoriser ces déchets grâce à des procédés comme la pyrolyse. L'objectif principal de ce travail était d'évaluer expérimentalement la pyrolyse de pneus du caoutchouc (STR) dans le but de produire des composés aromatiques monocycliques. Pour cela, une étude expérimentale de pyrolyse de STR sans catalyseur a été réalisée et les conditions les plus favorables de température et de débit d'azote ont été déterminées. La transformation du D,L limonène présent dans l’huile en aromatiques en utilisant différentes combinaisons hétéropolyacide/support ont été évaluées, afin de sélectionner les plus sélectives vers les aromatiques. Les résultats ont montré une conversion du limonène en p-cymène, monoterpènes et menthènes, et on a constaté que la production de p-cymène est promu par l'acidité de Lewis. Depuis, les catalyseurs étant plus sélectifs dans la transformation du limonène, ont été validés dans la pyrolyse de STR. Les résultats montrent que le rendement en aromatiques a augmenté (de 8,05%) à un maximum de 15,06 %p et la concentration a abouti environ 37%, en utilisant un catalyseur à base de molybdène dans lequel les sites d'acide de Lewis sont les prédominants
Scrap tire are waste that produces one of the largest annual production all over the world. Because its non-biodegradable composition, its end of life and treatment is difficult, causing environmental and public health problems, due to the accumulation and implementation of inappropriate treatment techniques. Based on this problem it is conceivable to seek to valorise these wastes through processes such as pyrolysis. The main objective of this work was to evaluate experimentally the pyrolysis of scrap tire rubber (STR) in order to improve single ring aromatic compounds, which have a higher industrial value in the oil of STR pyrolysis. To this end, an experimental study of pyrolysis of STR without catalyst was carried out and the most favorable temperature and nitrogen conditions were determined. The transformation of D, L limonene present in the oil into aromatics using different heteropolyacid / carrier combinations was evaluated, in order to select the most selective towards the aromatics. The results showed a conversion of limonene to p-cymene, monoterpenes and menthenes, and it was found that the production of p-cymene was promoted by Lewis acidity. Since the catalysts are more selective in the transformation of limonene, have been validated in the pyrolysis of STR. The results show that the yield of aromatics has increased (from 8.05%) to a maximum of 15.06% p and the concentration about 37%p, using a molybdenum catalyst in which the acid sites of Lewis are the predominant

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Mesones-Guillén, Axel, Lizeth Palacios-Jesús, Edgardo Carvallo-Munar, Rosa Salas-Castro, and Luis Cardenas-Rengifo. "Lean Manufacturing Model Adapted for Waste Reduction in Peruvian Condiment Production Agri-Businesses." Repositorio Academico - UPC, 2021. http://hdl.handle.net/10757/653813.

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Анотація:

El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.
The Peruvian export supply is primarily based on the segment of dressings and condiments. This paper seeks to adapt lean manufacturing tools using Poka-Yoke techniques and process standardization, which may align with existing processes to prevent production errors. This combination of tools is expected to reduce the percentage of waste generated throughout the condiment production process. Subsequent to an initial evaluation of the current method combined with the application of both the tools, 11.4% waste reduction was ultimately reported.
Revisión por pares

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Steinkeller, John. "Efficient Information Flow in a Supply Chain of Raw Materials." Thesis, KTH, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-220398.

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The Study aims to evaluate what kind of systems buyers of raw materials use for handling the flow of information in their supply chain of raw materials. Due to the complexity of the topic, the Study is only examining the continuous exchange of information between suppliers and buyers of raw materials. The purpose of the Study is to provide recommendations to Boliden on which system is suitable for implementation at the company. The Study’s results were achieved by collecting both primary and secondary data. The primary data was collected through interviews with raw materials buyers and trade organisations. A total of fifteen interviews were conducted in the Study. The secondary data was collected through a literature study. The results of the Study indicate that there exists four different solutions for managing the flow of information in a supply chain of raw materials. The most common solution among buyers of raw materials is to use the so-called “traditional” systems, i.e. e-mail, telephone and physical meetings. The second most common solution is to use an external information handling system provided by a trade organisation. The third most common solution is to use a commercial information handling system, i.e. a system provided by a commercial provider. Lastly, the least common solution is to develop an information handling system on its own, i.e. a proprietary information handling system. The conclusion of the Study is that Boliden should use two information handling system simultaneously, i.e. an external information handling system and the traditional information handling systems. However, Boliden should also look into the option of developing a proprietary information handling system.

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Hayagan, Neil. "Li-ion battery (LIB) direct recycling using pressurized CO2-based technology." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0239.

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Анотація:

Les batteries lithium-ion (LIB) ont révolutionné l'électronique portable et se sont étendues au secteur de la mobilité grâce aux progrès des matériaux d'électrodes, des électrolytes et des processus de production. Cependant, la demande croissante de LIB pose des défis mondiaux en matière de gestion des déchets. En tant que ressources critiques, les matériaux LIB nécessitent un recyclage efficace dans le contexte de l'économie circulaire tout en répondant aux objectifs de durabilité et de neutralité carbone. Les méthodes de recyclage conventionnelles, telles que la pyrométallurgie et l'hydrométallurgie, ne parviennent pas à récupérer entièrement les composants LIB, en particulier lorsque des déchets de production - un nouveau flux de déchets vierges - apparaissent. Le recyclage direct, une stratégie nouvelle et efficace, préserve les propriétés des matériaux telles que la composition, la structure et les propriétés, améliorant ainsi les taux de récupération. Cette thèse explore le recyclage direct des déchets de production et évalue le potentiel de recyclage des cellules 18650 usagées à différents niveaux de dégradation. Un nouveau procédé à base de CO2 a été développé pour le recyclage direct des déchets de production d'électrodes LIB. En utilisant un mélange de solvants de phosphate de triéthyle, d'acétone et de CO2, la dissolution du liant a été améliorée et la délamination des matériaux d'électrode positive a été accélérée, séparant efficacement LiNi0,6Mn0,2Co0,2O2 (NMC622) du collecteur de courant. L'étude explore également la dégradation dans les cellules 18650 avec cathode NMC622, anode en graphite et électrolyte à base d'EC sous divers protocoles de vieillissement, révélant des changements de matériaux importants, notamment la perte de Li, la décomposition de l'électrolyte et la migration du Mn. Le CO2 liquide et l'acétonitrile ont été utilisés pour extraire les carbonates et les produits de dégradation liquides, tandis que le carbonate de diméthyle comme cosolvant avec le CO2 liquide a permis une récupération élevée du lithium. Ces résultats fournissent des informations précieuses sur le vieillissement des batteries et mettent en évidence les défis d'un recyclage direct efficace, soulignant la nécessité de stratégies innovantes pour faire face à ces processus de dégradation complexes
Lithium-ion batteries (LIBs) have revolutionized portable electronics and expanded into the mobility sector through advancements in electrode materials, electrolytes, and production processes. However, the growing LIB demand poses global waste management challenges. As critical resources, LIB materials require efficient recycling within the context of circular economy while meeting sustainability and carbon-neutrality goals. Conventional recycling methods, such as pyrometallurgy and hydrometallurgy, fall short in fully recovering LIB components, particularly as production scraps—a new, pristine waste stream—emerge. Direct recycling, a novel and efficient strategy, preserves material properties such as composition, structure, and properties, improving the recovery rates. This dissertation explores direct recycling of production scraps and evaluate spent 18650 cells their recycling potential across varying levels of degradation. A novel CO2-based process was developed for the direct recycling of LIB electrode production scrap. Using a solvent mixture of triethyl phosphate, acetone, and CO2, binder dissolution was enhanced and the delamination of positive electrode materials was accelerated, efficiently separating LiNi0.6Mn0.2Co0.2O2 (NMC622) from the current collector. The study also explores the degradation in 18650 cells with NMC622 cathode, graphite anode, and EC-based electrolyte under various ageing protocols, revealing significant material changes, including Li loss, electrolyte decomposition, and Mn migration. Liquid CO2 and acetonitrile were used to extract carbonates and liquid degradation products, while dimethyl carbonate as a cosolvent with liquid CO2 allowed high lithium recovery. These findings provide valuable insights into battery aging and highlight challenges for effective direct recycling, emphasizing the need for innovative strategies to address this complex degradation processes

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Rojas, Pulgar Javier Ignacio. "Propuesta de mejora para reducir el Scrap generado en planta productiva Goodyear Chile utilizando metodología de gestión de calidad." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/170022.

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Salazar, Araya Alex Rodrigo. "Evaluación de la Línea de Producto Scrape – Pet Derivados de los Desechos de Salmón." Tesis, Universidad de Chile, 2011. http://www.repositorio.uchile.cl/handle/2250/102623.

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Книги з теми "Production scrap"

David J. Joseph Company (Cincinnati, Ohio), ed. The Relationships between scrap prices, steel production, purchased scrap receipts, and scrap exports, 1954-1985. [Cincinnati, Ohio] (P.O. Box 1078, Cincinnati 45201-1078): The Company, 1986.

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Khan, M. Ahmad. Crops' economics of production and cropping patterns in Swabi SCARP area. Peshawar: Institute of Development Studies, N.W.F.P. Agricultural University, 1998.

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Wassmer, Robert W. Contracted report to the Board: An analysis of subsidies and other options to expand the productive end use of scrap tires in California. Sacramento: California Environmental Protection Agency, Integrated Waste Management Board, 2002.

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Waste Production and Utilization in the Metal Extraction Industry. Taylor & Francis Group, 2017.

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Ndlovu, Sehliselo, Geoffrey S. Simate, and Elias Matinde. Waste Production and Utilization in the Metal Extraction Industry. Taylor & Francis Group, 2017.

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Ndlovu, Sehliselo, Geoffrey S. Simate, and Elias Matinde. Waste Production and Utilization in the Metal Extraction Industry. Taylor & Francis Group, 2020.

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Ndlovu, Sehliselo, Geoffrey S. Simate, and Elias Matinde. Waste Production and Utilization in the Metal Extraction Industry. Taylor & Francis Group, 2017.

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Ndlovu, Sehliselo, Geoffrey S. Simate, and Elias Matinde. Waste Production and Utilization in the Metal Extraction Industry. Taylor & Francis Group, 2017.

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Ndlovu, Sehliselo, Geoffrey S. Simate, and Elias Matinde. Waste Production and Utilization in the Metal Extraction Industry. Taylor & Francis Group, 2017.

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Trotter, Henry, Catherine Kell, Michelle Willmers, Eve Gray, and Thomas K. C. King. Seeking Impact and Visibility: Scholarly Communication in Southern Africa. African Minds, 2014. http://dx.doi.org/10.47622/978-1-920677-51-0.

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African scholarly research is relatively invisible globally because even though research production on the continent is growing in absolute terms, it is falling in comparative terms. In addition, traditional metrics of visibility, such as the Impact Factor, fail to make legible all African scholarly production. Many African universities also do not take a strategic approach to scholarly communication to broaden the reach of their scholars'work. To address this challenge, the Scholarly Communication in Africa Programme (SCAP) was established to help raise the visibility of African scholarship by mapping current research and communication practices in Southern African universities and by recommending and piloting technical and administrative innovations based on open access dissemination principles. To do this, SCAP conducted extensive research in four faculties at the Universities of Botswana, Cape Town, Mauritius and Namibia.

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Частини книг з теми "Production scrap"

Pantke, K., V. Güley, D. Biermann, and A. E. Tekkaya. "Aluminum Scrap Recycling Without Melting." In Future Trends in Production Engineering, 373–77. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-24491-9_37.

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Rosenthal, S., T. S. Hainmann, M. Heuse, H. Sulaiman, and A. E. Tekkaya. "Potential for Stamping Scrap Reduction in Progressive Processes." In Lecture Notes in Production Engineering, 810–20. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-18318-8_80.

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Toulouevski, Yuri N., and Ilyaz Y. Zinurov. "EAF in Global Steel Production; Energy and Productivity Problems." In Fuel Arc Furnace (FAF) for Effective Scrap Melting, 1–6. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5885-1_1.

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Bhoopathi, R., K. Karthikeyan, J. Balamurugan, S. Krishnakanth, and T. Dharan Raj. "Fabrication of Automated Scrap Collector Cum Scrubber for Production Industries." In Lecture Notes in Mechanical Engineering, 149–57. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6374-0_18.

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Ferron, C. J., J. Peer, J. Andrews, and C. A. Fleming. "Hydrometallurgical Production of High-Purity Ammonium Perrhenate from Superalloy Scrap." In Proceedings of the 63rd Conference of Metallurgists, COM 2024, 1217–23. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-67398-6_206.

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Böhm, J., M. Liewald, and P. Clauß. "Study on Scrap Reduction in Cold Forging During Ramp-Up Phases Through Actuator Control." In Lecture Notes in Production Engineering, 326–34. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-47394-4_32.

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Luhovskyi, Oleksandr, Andrii Zilinskyi, Alina Shulha, Ihor Gryshko, Ihor Nochnichenko, and Dmytro Kostiuk. "Technology of Hydrogen Production from Aluminum Scrap by Using Ultrasonic Cavitation." In Lecture Notes in Mechanical Engineering, 291–301. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-43002-2_27.

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Gesing, Adam J., Subodh K. Das, and Raouf O. Loutfy. "Production of Magnesium and Aluminum-Magnesium Alloys from Recycled Secondary Aluminum Scrap Melts." In REWAS 2016, 253–54. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48768-7_38.

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J.Gesing, Adam, Subodh K. Das, and Raouf O.Loutfy. "Production of Magnesium and Aluminum-Magnesium Alloys from Recycled Secondary Aluminum Scrap Melts." In Rewas 2016: Towards Materials Resource Sustainability, 253–54. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119275039.ch38.

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Kevorkijan, Varuzan M., and Sandi Žist. "The Low-Carbon Production of Wrought Aluminum Alloys Based on Post-consumer Scrap." In The Minerals, Metals & Materials Series, 309–14. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-22532-1_42.

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Тези доповідей конференцій з теми "Production scrap"

Lua, Jim, Jinhui Yan, Joshua Piccoli, Kalyan Shrestha, Anand Karuppiah, and Nam Phan. "Multi-Physics Modeling and Optimization Towards a Digital Twin of Quenching Processes of Large-Scale Metallic Structures." In Vertical Flight Society 80th Annual Forum & Technology Display, 1–9. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0080-2024-1399.

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Quenching is a heat treatment process for the rapid cooling of a metallic workpiece in water, oil, or air to obtain certain desired material properties. It is the most critical step in the sequence of heat-treating operations to preserve the solid solution formed at the solution heat-treating temperature by rapidly cooling to near room temperature. Because of the complex interaction between temperature, phase-transformation, and stress/strain relation that depends on the temperature distribution and the microstructure of the workpiece, there is no performance-informed quenching process that can be applied reliably to reduce the high scrap rate of airframe aluminum forging parts with a significant amount of residual stress and distortion. Since large aluminum forging parts are increasingly used in aerospace structures to enable structural unitization, it is important to construct a digital twin modeling approach to mirror the physical quenching process for minimizing scrap rate, increasing production efficiency, and engineers and machine operators' handling of variances in forging operations. A high-fidelity modeling of the coupling of thermal, metallurgical, and mechanical interactions is a key component to creating a digital twin of the physical quenching process. A high-fidelity thermal multi-phase computational fluid dynamics (CFD) model is applied to simulate fluid dynamics and temperature fields in the quenchant tank. The developed immersogeometric modeling approach is used next for an efficient model generation of a 3D workpiece with various dipping orientations. Given the temperature and pressure profiles predicted from the CFD-based heat transfer module, residual stress and distortion prediction modules are developed by including temperature and pressure fields mapping and temperature and strain rate dependent property evolution via Abaqus' user-defined subroutines. Verification and demonstration studies are performed using aluminum coupons dipped into a quenching tank with different orientations. Time histories of the temperature and residual stress fields were predicted to explore the relationship between the process and performance.

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Decker, Ryan, Andrew Baines, Dave Carlson, James Kooiman, Keith Stanney, and Doug Wolfe. "Affordable Design and Manufacturing of the V-280 Wing." In Vertical Flight Society 73rd Annual Forum & Technology Display, 1–7. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12100.

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The development of Bell's third-generation tiltrotor, the V-280, places great focus on achieving low cost and robust design simplicity and is demonstrated on the Joint Multi-Role (JMR) Air Vehicle Concept Demonstrator (AVCD). The design and manufacture of the V-280 AVCD wing structure is an example that achieves significant recurring and development cost savings through the infusion of Design for Manufacturing (DFM) principles, advanced materials, robust manufacturing processes, and low-cost developmental tooling. To drive simplicity through all aspects of the design, the V-280 AVCD wing employs a straight, constant section profile with no forward sweep or upward dihedral. Wing skins, spars, and ribs utilize a broad goods layup technique that favors large fabric ply shapes over highly tailored tape plies. This approach has yielded significant reduction in fabrication labor hours (via increased composite material application rates) and has resulted in reduced scrap material. Mechanical assembly hours are also reduced through use of room-temperature paste bonded structure as well as large scale use of determinant assembly methods. Multiple risk reduction test articles, produced concurrently with the design effort, helped to inform and validate the producibility and structural integrity of the final design configuration. New production methods applied to the V-280 demonstrator wing have yielded a projected 57% reduction in total labor hours and a 50% reduction in development tool costs. At the same time, a minimal capital investment profile is supporting the potential production rates necessary for a Future Vertical Lift (FVL) program of record.

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Gu¨mu¨s¸, Beril, and Bu¨lent Ekici. "A New Sheet Die Design Methodology to Eliminate Scrap Shedding Problems During Mass Production." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-25024.

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Manufacturing companies need to improve their production technology with improved dimensional accuracy at lower cost in order to manufacture sheet metal based products. Scrap shedding is an issue that should be examined at the cutting and sheet metal forming operations. In order to extend the life cycle of the cutting moulds, scrap shedding should be identified. When scrap shedding has not been taken into consideration, scraps have accumulated in the moulds reducing the production quality and causing deformation of the mould, increasing the production cost by obligating to perform extra transactions. This study becomes more focused upon the analysis of scrap shedding. In order to simulate the scrap shedding LS-Dyna and Pam Stamp software have been used. For examining of the scrap shedding an automotive part was chosen. In order to realize scrap shedding having any problems, new improvements have been suggested. Design of Experiments techniques which provide important advantages to engineering studies have been examined. By means of experimental design techniques the scrap shedding design process was also added to the classical mold design approach via a less quantities of simulations.

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Mitchell, VeRonica, and Matt Carroll. "From Painted “Scrap” to Painted Production Parts." In SAE 2000 World Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-0024.

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Pijuan, J., H. Maicas, S. A. Cegarra, R. Hernández, T. Baldi, S. Font, and J. Nin. "Metal Powder Production From Machining Metal Scrap Using Centrifugal Atomization." In Euro Powder Metallurgy 2024 Congress & Exhibition. EPMA, 2024. http://dx.doi.org/10.59499/ep246278293.

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In this study it is proposed to use machining metal chips with a pre-established and controlled chemical composition as raw material for metal powder production. The centrifugal atomization technology is used to produce this metal powder, bridging the gap between collecting recyclable metal scraps and obtaining the final powder, therefore enhancing the overall sustainability of the process. This study involves the collection of metal chips, their treatment for the removal of cooling liquids and other residues, and their subsequent use as raw material for metal powder manufacturing. Three different case studies are presented, including AlSi7Mg aluminium alloy, a Sn-based alloy also called White Metal alloy or Babbitt alloy, and a Ti6Al4V titanium alloy, illustrating the versatility and applicability of the proposed approach.

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Wang, Rongsheng, Bo Zhou, Yirong Liu, Fang Fang, Zeqing Chang, and Yuyao Sun. "Automatic steel grabbing robot system for scrap steel processing production line." In 2021 IEEE International Conference on Robotics and Biomimetics (ROBIO). IEEE, 2021. http://dx.doi.org/10.1109/robio54168.2021.9739582.

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Bouzouni, Marianthi, and Spyros Papaefthymiou. "How to Design the Utilization of Larger Scrap Share in Aluminum Production." In RawMat 2021. Basel Switzerland: MDPI, 2021. http://dx.doi.org/10.3390/materproc2021005043.

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MIKOLAJČÍK, M. "Impact of Increased Iron Content and Manganese Addition on Intermetallic Phases and Fatigue Resistance of AlSi7Mg0.6 Secondary Alloy." In Quality Production Improvement and System Safety. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902691-5.

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Abstract. One of the most often utilized metals in a variety of industries is aluminium alloy. Secondary aluminium alloys have drawn a lot of interest in recent years. Scrap aluminium may be recycled, which is good for the environment. In addition, compared to primary aluminium, it produces at a lower cost due to its lower energy requirement. Because it adversely affects their characteristics, secondary aluminium alloys' higher iron concentration presents the most frequent challenge. Manganese can be added to reduce its impact to some level. The objective of this research is to improve our knowledge of how iron and manganese affect the fatigue resistance of secondary aluminium alloys. Four alloys with various iron and manganese concentrations were tested to determine this impact.

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Fu, Hao. "Improvement on the Manufacture of UO2 Pellet." In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60089.

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Recently, the ratio of the UO2 powder made from dry process has increased obviously comparing those produced by wet process since the wet process has been gradually eliminated. Furthermore, the yield of the pellet is less than 85% during the UO2 pellet production process. This causes the increasing tendency of scrap stocked and production cost. It is because the wet process method cannot adapt to the dry process powder. In this article, improvement on the manufacture of UO2 pellet is researched. Firstly, To achieve the minimum defection of the pellet and residual volume of the grinding scrap, several variable processes such as the improving density of the green pellet, the redesigning cavity block size and the modified pressure maintain method were investigated. The optimum process is shown to be a much superior approach to improving the yield of the pellet, decreasing the amount of the scrap, the cost of production and contributing to further developing of pellet manufacturing technology.

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Delpla, Victor, Jean-Pierre Kenne, Ameth Maloum, Mahan Balalpour, and Lucas A. Hof. "Metal Scrap Recycling 4.0: Towards Smart Operation And Production Of High-Quality Alloys." In Canadian Society for Mechanical Engineering International Congress (2021 : Charlottetown, PE). Charlottetown, P.E.I.: University of Prince Edward Island. Robertson Library, 2021. http://dx.doi.org/10.32393/csme.2021.140.

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Звіти організацій з теми "Production scrap"

A temporary production worker died when he was caught in a tread scrap machine. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, June 2005. http://dx.doi.org/10.26616/nioshsface05ok024.

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