Carbothermic Reduction Mechanism of Vanadium-titanium Magnetite

作     者：Shuang-yin CHEN Xiao-jiao FU Man-sheng CHU Xi-zhe LI Zheng-gen LIU Jue TANG 

作者机构：School of MetallurgyNortheastern University 

出 版 物：《Journal of Iron and Steel Research International》 (Journal of Iron and Steel Research, International)

年 卷 期：2016年第23卷第5期

页      面：409-414页

核心收录：

学科分类：080602[工学-钢铁冶金] 081902[工学-矿物加工工程] 0819[工学-矿业工程] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Item Sponsored by National High-tech Research and Development Project of China(2012AA062302) Major Program of National Natural Science Foundation of China(51090384) Fundamental Research Funds for the Central Universities of China(N130602003) 

主　　题：vanadium titanium magnetite carbothermic reduction mechanism phase transformation kinetics 

摘      要：To achieve the high-efficiency utilization of vanadium-titanium magnetite（ VTM）,reduction experiments were conducted to determine the carbothermic reduction mechanism of VTM. Effects of volatile matter,temperature,time,and carbon ratio（ molar ratio of fixed carbon in coal to oxygen in iron oxides of VTM） on reduction degree were *** show that reduction degree increases with increasing volatile matter in coal,temperature,time,and carbon *** transformation,microstructure,and reduction path were analyzed by X-ray diffraction,scanning electron microscopy,energy-dispersive X-ray spectroscopy,and Fact Sage 6. 0. The thermoravimetry-differential scanning calorimetry-quadrupole mass spectrometer method was used for kinetic analysis of the main reduction process. Results indicate that the kinetic mechanism follows the principle of random nucleation and growth（ n = 4）,and the activation energy values at 600-900 and 900-1 350 ℃ are 88. 7 and 295. 5 kJ / mol,respectively.