Reduction and melting behavior of carbon composite lateritic bauxite pellets

作     者：Ying-yi Zhang Jie Zhao Yuan-hong Qi Xiang-li Cheng Zong-shu Zou 

作者机构：State Key Laboratory of Advance Steel Processes and Products Central Iron and Steel Research Institute School of Material and Metallurgy Northeast University 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2015年第22卷第4期

页      面：381-388页

核心收录：

学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：financially supported by the International Scientific and Technological Cooperation and Exchange Projects of China (No. 2013DFG50640) 

主　　题：bauxite ore pellets direct reduction process melting behavior metallization 

摘      要：Direct reduction of low-grade lateritic bauxite was studied at high temperature to recover Fe and beneficiate AlzO3 slag. The re- sults show that a metallization rate of 97.9% and a nugget recovery rate of 85.1% can be achieved when the reducing and melting tempera- tures are 1350 and 1480℃, respectively. Moreover, a higher-grade calcium aluminate slag （A1203 = 50.52wt%） can also be obtained, which is mainly composed of ct-A1203, hercynite （FeAI：O4）, and gehlenite （Ca2A12SiO7）. 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）.