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Solid State Carbothermal Reduction of Alumina

Chapter


Abstract


  • The Hall-Heroult process, the only commercial technology for aluminum production requires high energy and is a major origin of perfluorocarbons and green house gases. A promising alternative process, carbothermal reduction of alumina to metallic aluminum has advantages of lower capital cost, less energy consumption, and lower emission of green house gases. Carbothermal reduction processes under development are based on formation of aluminum carbide-alumina melts at high temperatures. Solid state carbothermal reduction of alumina is possible at reduced CO partial pressure. This paper presents results of experimental study of carbothermal reduction of alumina into aluminum carbide in Ar, He and H2 atmospheres at 1500-1700°C. The reduction rate of alumina increases with increasing temperature, and is significantly faster in He and H2 than in Ar. Increasing gas flow rate and decreasing pressure favors the reduction. © 2013 The Minerals, Metals & Materials Society.

Publication Date


  • 2013

Citation


  • Liu, D., Zhang, G., Li, J., & Ostrovski, O. (2013). Solid State Carbothermal Reduction of Alumina. In Essential Readings in Light Metals (Vol. 2, pp. 1076-1081). doi:10.1002/9781118647851.ch157

International Standard Book Number (isbn) 13


  • 9781118635742

Scopus Eid


  • 2-s2.0-84887086491

Web Of Science Accession Number


Book Title


  • Essential Readings in Light Metals

Start Page


  • 1076

End Page


  • 1081

Abstract


  • The Hall-Heroult process, the only commercial technology for aluminum production requires high energy and is a major origin of perfluorocarbons and green house gases. A promising alternative process, carbothermal reduction of alumina to metallic aluminum has advantages of lower capital cost, less energy consumption, and lower emission of green house gases. Carbothermal reduction processes under development are based on formation of aluminum carbide-alumina melts at high temperatures. Solid state carbothermal reduction of alumina is possible at reduced CO partial pressure. This paper presents results of experimental study of carbothermal reduction of alumina into aluminum carbide in Ar, He and H2 atmospheres at 1500-1700°C. The reduction rate of alumina increases with increasing temperature, and is significantly faster in He and H2 than in Ar. Increasing gas flow rate and decreasing pressure favors the reduction. © 2013 The Minerals, Metals & Materials Society.

Publication Date


  • 2013

Citation


  • Liu, D., Zhang, G., Li, J., & Ostrovski, O. (2013). Solid State Carbothermal Reduction of Alumina. In Essential Readings in Light Metals (Vol. 2, pp. 1076-1081). doi:10.1002/9781118647851.ch157

International Standard Book Number (isbn) 13


  • 9781118635742

Scopus Eid


  • 2-s2.0-84887086491

Web Of Science Accession Number


Book Title


  • Essential Readings in Light Metals

Start Page


  • 1076

End Page


  • 1081