Influence and mechanism of Indonesia vanadium titano-magnetite on metallurgical properties of iron ore sinter  

作　　者：GAO Qiang-jian WEI Guo SHEN Yan-song JIANG Xin ZHENG Hai-yan SHEN Feng-man LIU Chang-sheng 高强健;魏国;沈岩松;姜鑫;郑海燕;沈峰满;刘常升

机构地区：[1]School of Metallurgy, Northeastern University, Shenyang 110819, China [2]School of Chemical Engineering, University of New South Wales, Sydney 2052, Australia

出　　处：《Journal of Central South University》2017年第12期2805-2812,共8页中南大学学报（英文版）

基　　金：Projects(51604069,51604049,U1508213) supported by the National Natural Science Foundation of China;Project(N162504004) supported by the Fundamental Research Funds for the Central Universities,China;Projects(2017YFB0603800,2017YFB0603801) supported by the National Key R&D Program of China

摘　　要：In order to provide a reliable reference for utilizing Indonesia vanadium titano-magnetite(VTM) in blast furnace(BF) economically, metallurgical properties of iron ore sinter with addition of Indonesia VTM in mixed sintering materials were investigated, including low-temperature reduction degradation index(RDI), reducibility index(RI), and softening/melting properties. Additionally, influenced mechanism of Indonesia VTM on metallurgical properties of sinter was studied. It is found that adding Indonesia VTM in sintering process quickly increases the RDI of sinters, and decreases the RI from 78.02% to 68.43%. Moreover, both beginning temperature(T_4) and final temperature(TD) of softening/melting increase gradually, and cohesive zone temperature range(T_D–T_4) enlarges from 219 oC to 315 oC. As a result, the permeability of cohesive zone gets worse, which is proven by the higher maximum pressure drop(δPmax) in softening/melting experiments. It is concluded that, after comprehensively considering all metallurgical properties mentioned above, the proper proportion of Indonesia VTM in sintering process is proposed in the new raw materials conditions.In order to provide a reliable reference for utilizing Indonesia vanadium titano-magnetite(VTM) in blast furnace(BF) economically, metallurgical properties of iron ore sinter with addition of Indonesia VTM in mixed sintering materials were investigated, including low-temperature reduction degradation index(RDI), reducibility index(RI), and softening/melting properties. Additionally, influenced mechanism of Indonesia VTM on metallurgical properties of sinter was studied. It is found that adding Indonesia VTM in sintering process quickly increases the RDI of sinters, and decreases the RI from 78.02% to 68.43%. Moreover, both beginning temperature(T_4) and final temperature(TD) of softening/melting increase gradually, and cohesive zone temperature range(T_D–T_4) enlarges from 219 oC to 315 oC. As a result, the permeability of cohesive zone gets worse, which is proven by the higher maximum pressure drop(δPmax) in softening/melting experiments. It is concluded that, after comprehensively considering all metallurgical properties mentioned above, the proper proportion of Indonesia VTM in sintering process is proposed in the new raw materials conditions.

关 键 词：Indonesia VANADIUM titano-magnetite SINTER reduction degradation INDEX REDUCIBILITY INDEX SOFTENING and MELTING properties 

分 类 号：TF046.4[冶金工程—冶金物理化学]