钒钛铁精矿盐酸浸出渣碳热还原法制备碳氮化钛复合粉末工艺研究  

Study on preparation of TiCN composite powder using hydrochloric acid leaching residue of titanomagnetite concentrate by carbothermal reduction method

作　　者：吴恩辉 侯静 李军 赖奇 杨绍利 柴航 黄平 徐众 

机构地区：[1]攀枝花学院攀西科技创新中心,四川攀枝花617000

出　　处：《中国有色冶金》2018年第1期68-73,共6页China Nonferrous Metallurgy

基　　金：国家级大学生创新实验项目资助(2015cxcy078)

摘　　要：对Fe-Ti-N-C-O系热力学计算和分析表明,钒钛铁精矿盐酸浸出渣采用碳热还原工艺制备TiCN在热力学上是可行的。通过XRD对还原产物进行物相分析和计算,探索了配碳量、还原温度和还原时间对还原过程和还原产物TiC_(1-x)N_x碳氮比的影响,实验结果表明:随着还原温度的升高、还原时间的延长和配碳量的增加,还原产物TiC_(1-x)N_x碳氮比有下降的趋势。在配碳量为1.6、还原温度1 500℃、还原时间30 min时,还原产物TiC_(1-x)N_x的x值为0.775,C/N=0.29。The thermodynamic calculation and analysis of Fe-Ti-N-C-O system show that the preparation process of TiCN composite powder using hydrochloric acid leaching residue of titanomagnetite concentrate by carbothermal reduction method is feasible in thermodynamic. The influences of reduction temperature, reduction time and carbon content on the reaction process and C/N ratio of reduction product TiC 1 -xNx during carbothermal reduction is mainly investigated using X-ray diffraction（XRD）. The results show that, with the increasing of reduction temperature, reduction time and carbon content, the C/N ratio of TiC1-xNx is gradually decreased. At reduction temperature of 1 500℃ for 30 min with 1.6 carbon content, the reduction product TiC1-xNx can be obtained with 0.29 of C/N ratio and x = 0. 775.

关 键 词：钒钛铁精矿 盐酸浸出渣 碳氮化钛 碳热还原 

分 类 号：TF823[冶金工程—有色金属冶金]