Reduction and melting behavior of carbon composite lateritic bauxite pellets
来源期刊：International Journal of Minerals Metallurgy and Materials2015年第4期
论文作者：Ying-yi Zhang Jie Zhao Yuan-hong Qi Xiang-li Cheng Zong-shu Zou
文章页码：381 - 388
摘 要：Direct reduction of low-grade lateritic bauxite was studied at high temperature to recover Fe and beneficiate Al2O3 slag. The results show that a metallization rate of 97.9% and a nugget recovery rate of 85.1% can be achieved when the reducing and melting temperatures are 1350 and 1480°C, respectively. Moreover, a higher-grade calcium aluminate slag（Al2O3 = 50.52wt%） can also be obtained, which is mainly composed of α-Al2O3, hercynite（Fe Al2O4）, and gehlenite（Ca2Al2SiO7）. In addition, high-quality iron nuggets have been produced from low-grade lateritic bauxite. The nugget is mainly composed of iron（93.82wt%） and carbon（3.86wt%）, with almost no gangue（slag）.
Ying-yi Zhang1,2，Jie Zhao1，Yuan-hong Qi1，Xiang-li Cheng1，Zong-shu Zou2
1. State Key Laboratory of Advance Steel Processes and Products, Central Iron and Steel Research Institute2. School of Material and Metallurgy, Northeast University
摘 要：Direct reduction of low-grade lateritic bauxite was studied at high temperature to recover Fe and beneficiate Al2O3 slag. The results show that a metallization rate of 97.9% and a nugget recovery rate of 85.1% can be achieved when the reducing and melting temperatures are 1350 and 1480°C, respectively. Moreover, a higher-grade calcium aluminate slag（Al2O3 = 50.52wt%） can also be obtained, which is mainly composed of α-Al2O3, hercynite（Fe Al2O4）, and gehlenite（Ca2Al2SiO7）. In addition, high-quality iron nuggets have been produced from low-grade lateritic bauxite. The nugget is mainly composed of iron（93.82wt%） and carbon（3.86wt%）, with almost no gangue（slag）.
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