The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Shuming Ma - One of the best experts on this subject based on the ideXlab platform.
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Application of cleaner production in a Chinese magnesia Refractory Material plant
Journal of Cleaner Production, 2016Co-Authors: Jin-hua Li, Shushen Zhang, Shuai Shao, Yun Zhang, Shuming MaAbstract:The rapid development of the magnesia Refractory industry has caused serious problems of resource and energy waste and environmental pollution. Cleaner Production and Cleaner Production Audit are considered effective tools for energy conservation and emission reduction in the industry. This study presents an application of cleaner production and cleaner production audit in a typical large-scale magnesia raw Material production plant in Liaoning, China and the results of their implementation. Through the 7 steps of a cleaner production audit (planning and organization, pre-assessment, assessment, option generation and screening, feasibility analysis, implementation, and maintenance of cleaner production), the resource and energy consumption and environmental emissions of the enterprise are investigated, the key auditing procedures are identified, and the cleaner production opportunities are analyzed. 28 cleaner production options, including raw Material and energy substitution, technology improvement, facility maintenance and updates, process optimization and control, waste reutilization, management, and staff training and motivation, have been developed and implemented in a feasible way. After complete implementation of these options, great environmental and economic benefits are expected to be achieved: increased utilization of magnesite tailing powder by 281,000 t per year; annual savings of 25,000 t of magnesite ore; savings of 384,000 kW h of electricity; a 21.7% reduction in magnesite consumption per ton of FM product; improvement of the wastewater utilization rate from 70% to 100%; the removal of dust, SO2and NOxemissions produced by burning coal or producer gas; savings of 1.066 million USD per year. The results demonstrate that implementing cleaner production can not only bring huge environmental benefits, but also significant economic gains. Moreover, factory staff have recognized the benefits that cleaner production can bring to the plant, and plan to continue the process. Since there are few studies on the application of cleaner production in the magnesia Refractory industry, this paper provides scientific guidelines for its implementation in other similar enterprises, and a theoretical and practical basis for promoting the sustainable development of the industry.
David Franco - One of the best experts on this subject based on the ideXlab platform.
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tribological performance at high temperatures of alumina coatings applied by plasma spraying process onto a Refractory Material
Surface & Coatings Technology, 2019Co-Authors: David Franco, Helene Ageorges, Esperanza Lopez, Fabio VargasAbstract:Abstract Two different Al2O3 coatings manufactured by plasma spraying process were tested under dry sliding contact conditions at high temperatures in order to determine their tribological behavior. At higher temperature than 800 °C, wear rate and mechanisms for Al2O3 coatings have not yet been reported. The results obtained were compared with those from both: an electro-melted Al2O3 Refractory used as reference and a pressed & sintered silico-aluminous Refractory used as substrate, which were tested under the same conditions. The reference was chosen due to the high performance against wear that this Material shows, and the substrate was chosen due to the high potential that this Material with low properties against wear shows when it is coated. Crystallographic phases, micro-hardness, Young's modulus and fracture toughness were measured before and after the wear tests, obtaining as results that both Al2O3 coatings showed better wear performance than the pressed & sintered silico-aluminous Refractory used as substrate, and even than the electro-melted Al2O3 Refractory used as reference. Additionally, in the plasma sprayed coatings, as well as, in the electro-melted Al2O3 Refractory, the wear mechanism was controlled by a transformation produced by the increasing in temperature from ductile deformation to brittle deformation, for finally returning to ductile deformation again. The high performance of plasma sprayed coatings was mainly due to the high values of toughness, as well as due to the increasing of the α-Al2O3 levels and therefore, the hardness during the wear tests because of the high temperature, allowing to these ceramic coatings to be a possible way to protect the conventional pressed & sintered silico-aluminous refractories to replace the expensive non-structural electro-melted ones currently exposed to abrasive wear in glass, cement and other primary industries.
Christos G Aneziris - One of the best experts on this subject based on the ideXlab platform.
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Investigation on pressure slip casting of carbon bonded alumina
InterCeram: International Ceramic Review, 2018Co-Authors: C. Jahn, N. Gerlach, K. Moritz, A. Weber, Christos G AnezirisAbstract:© 2018, Springer Fachmedien Wiesbaden. Carbon bonded alumina is an important Refractory Material for example in the steel industry. The production of these shaped Materials is currently press forming. Pressure slip casting could be a new approach for manufacturing such products with new potential in the batch composition. In this study the first carbon containing, coarse grained alumina tiles could be casted and showed promising thermomechanical properties. The development from the slurry to the casted plate is shown within this work.
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functional Refractory Material design for advanced thermal shock performance due to titania additions
International Journal of Applied Ceramic Technology, 2007Co-Authors: Christos G Aneziris, U Klippel, Wolfgang Dipl Ing Scharfl, V Stein, Yawei LiAbstract:One of the biggest challenges of Refractory Materials during metallurgical applications is the thermal shock performance. In terms of this work, different ways of improving the thermal shock resistance in carbon-bonded as well as in oxide-based Materials by adding reactive titania powders are explored with the aid of thermal shock tests and followed by microstructure evaluation. The laboratory results obtained lead to microstructures with superior thermal shock properties and open the horizon of development of functional components such as slide gates or nozzles for clean steel technology.
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magnesia carbon bricks a high duty Refractory Material
Interceram, 2003Co-Authors: Christos G Aneziris, D Borzov, J UlbrichtAbstract:This paper gives a short summary of the stage of development in the production of magnesia-carbon bricks, focusin especially on the binders used (tar pitch, synthetic resin and Carbores).
Jin-hua Li - One of the best experts on this subject based on the ideXlab platform.
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Application of cleaner production in a Chinese magnesia Refractory Material plant
Journal of Cleaner Production, 2016Co-Authors: Jin-hua Li, Shushen Zhang, Shuai Shao, Yun Zhang, Shuming MaAbstract:The rapid development of the magnesia Refractory industry has caused serious problems of resource and energy waste and environmental pollution. Cleaner Production and Cleaner Production Audit are considered effective tools for energy conservation and emission reduction in the industry. This study presents an application of cleaner production and cleaner production audit in a typical large-scale magnesia raw Material production plant in Liaoning, China and the results of their implementation. Through the 7 steps of a cleaner production audit (planning and organization, pre-assessment, assessment, option generation and screening, feasibility analysis, implementation, and maintenance of cleaner production), the resource and energy consumption and environmental emissions of the enterprise are investigated, the key auditing procedures are identified, and the cleaner production opportunities are analyzed. 28 cleaner production options, including raw Material and energy substitution, technology improvement, facility maintenance and updates, process optimization and control, waste reutilization, management, and staff training and motivation, have been developed and implemented in a feasible way. After complete implementation of these options, great environmental and economic benefits are expected to be achieved: increased utilization of magnesite tailing powder by 281,000 t per year; annual savings of 25,000 t of magnesite ore; savings of 384,000 kW h of electricity; a 21.7% reduction in magnesite consumption per ton of FM product; improvement of the wastewater utilization rate from 70% to 100%; the removal of dust, SO2and NOxemissions produced by burning coal or producer gas; savings of 1.066 million USD per year. The results demonstrate that implementing cleaner production can not only bring huge environmental benefits, but also significant economic gains. Moreover, factory staff have recognized the benefits that cleaner production can bring to the plant, and plan to continue the process. Since there are few studies on the application of cleaner production in the magnesia Refractory industry, this paper provides scientific guidelines for its implementation in other similar enterprises, and a theoretical and practical basis for promoting the sustainable development of the industry.
Fabio Vargas - One of the best experts on this subject based on the ideXlab platform.
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tribological performance at high temperatures of alumina coatings applied by plasma spraying process onto a Refractory Material
Surface & Coatings Technology, 2019Co-Authors: David Franco, Helene Ageorges, Esperanza Lopez, Fabio VargasAbstract:Abstract Two different Al2O3 coatings manufactured by plasma spraying process were tested under dry sliding contact conditions at high temperatures in order to determine their tribological behavior. At higher temperature than 800 °C, wear rate and mechanisms for Al2O3 coatings have not yet been reported. The results obtained were compared with those from both: an electro-melted Al2O3 Refractory used as reference and a pressed & sintered silico-aluminous Refractory used as substrate, which were tested under the same conditions. The reference was chosen due to the high performance against wear that this Material shows, and the substrate was chosen due to the high potential that this Material with low properties against wear shows when it is coated. Crystallographic phases, micro-hardness, Young's modulus and fracture toughness were measured before and after the wear tests, obtaining as results that both Al2O3 coatings showed better wear performance than the pressed & sintered silico-aluminous Refractory used as substrate, and even than the electro-melted Al2O3 Refractory used as reference. Additionally, in the plasma sprayed coatings, as well as, in the electro-melted Al2O3 Refractory, the wear mechanism was controlled by a transformation produced by the increasing in temperature from ductile deformation to brittle deformation, for finally returning to ductile deformation again. The high performance of plasma sprayed coatings was mainly due to the high values of toughness, as well as due to the increasing of the α-Al2O3 levels and therefore, the hardness during the wear tests because of the high temperature, allowing to these ceramic coatings to be a possible way to protect the conventional pressed & sintered silico-aluminous refractories to replace the expensive non-structural electro-melted ones currently exposed to abrasive wear in glass, cement and other primary industries.