Carbothermic reduction of vanadium titanomagnetite with the assistance of sodium carbonate  

作　　者：Luming Chen Yulan Zhen Guohua Zhang Desheng Chen Lina Wang Hongxin Zhao Fancheng Meng Tao Qi 

机构地区：[1]National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,Institute of Process Engineering,Beijing 100190,China [2]School of Chemical Engineering,University of Chinese Academy of Sciences,Beijing 100190,China [3]State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2022年第2期239-247,共9页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Key R&D Program of China(No.2018YFC1900500);the National Natural Science Foundation of China(Nos.21908231,51774260,51804289,and 51904286);the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(No.QYZDJ-SSW-JSC021);the CAS Interdisciplinary Innovation Team;the Special Project for Transformation of Major Technological Achievements in Hebei Province,China(No.19044012Z)。

摘　　要：The carbothermic reduction of vanadium titanomagnetite concentrate(VTC)with the assistance of Na_(2)CO_(3)was conducted in an argon atmosphere between 1073 and 1473 K.X-ray diffraction and scanning electron microscopy were used to investigate the phase transformations during the reaction.By investigating the reaction between VTC and Na_(2)CO_(3),it was concluded that molten Na_(2)CO_(3)broke the structure of titanomagnetite by combining with the acidic oxides(Fe_(2)O_(3),TiO_(2),Al_(2)O_(3),and SiO_(2))to form a Na-rich melt and release FeO and MgO.Therefore,Na_(2)CO_(3)accelerated the reduction rate.In addition,adding Na_(2)CO_(3)also benefited the agglomeration of iron particles and the slag–metal separation by decreasing the viscosity of the slag.Thus,Na_(2)CO_(3)assisted carbothermic reduction is a promising method for treating VTC at low temperatures.

关 键 词：vanadium titanomagnetite sodium carbonate phase transformation carbothermic reduction slag–metal separation 

分 类 号：TF55[冶金工程—钢铁冶金]