高温素材プロセッシング

[2501-10-10] アルミナの熱炭素還元プロセスにおけるアルミナカーバイドの添加効果

○Chahtou Amina¹、Benioub Rabie¹、Zeng Lihaowen¹、小畠 秀和¹、伊髙 健治¹ (1. 弘前大学)

司会：安田 幸司（京都大学）

キーワード：熱炭素還元、アルミナ、シリコン、熱力学相図

In terms of electricity consumption, the carbothermal reduction process of alumina (Al₂O₃) represents one of the promising candidates to overcome the current industrial Hall-Héroult process for the production of aluminum (Al) from Al₂O₃. The yield of the carbothermal reduction process of Al₂O₃, however, is not high enough to be considered as a substitute for the present industrial process. The calculation of the gas phase diagram of Al-O-C system suggests the possibility of the enhancement of the Al product yield by the increase of the ratio of the partial pressure Al₂O/CO. An increase in the ratio of the partial pressure Al₂O/CO can be expected by the reaction of aluminum carbide (Al₄C₃) and Al₂O₃. We investigated the effect of adding Al₄C₃ on the enhancement of the final Al yield in the production process