直接还原处理低品位钒钛磁铁精矿  

Treatment of Low Grade Vanadium-Bearing Titanomagnetite Concentrates by Direct Reduction

作　　者：白云[1,2,3] 陈德胜[2,3] 马文会[1] 王丽娜[2,3] 赵宏欣[2,3] 甄玉兰[2,3] 于宏东[2,3] 齐涛[1,2,3] 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650000 [2]中国科学院过程工程研究所绿色过程与工程重点实验室,北京100190 [3]中国科学院过程工程研究所湿法冶金与清洁生产国家工程实验室,北京100190

出　　处：《有色金属（冶炼部分）》2017年第9期48-53,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51374191;21506233);中国科学院科技服务网络计划(STS计划)项目(KFJ-SW-STS-148)

摘　　要：在1 000~1 300℃添加少量Na_2CO_3+NaCl复配添加剂,以无烟煤做还原剂等温还原低品位钒钛磁铁精矿,再通过磁选分离获得铁精粉和钒钛渣。考察了C/Fe摩尔比、还原温度和还原时间对铁的还原、钒钛迁移富集行为以及物相转化规律的影响。结果表明,C/Fe摩尔比和反应温度对直接还原过程中有价组分迁移富集的影响很大,当C/Fe摩尔比为1.2时,在1 200℃还原2h,钒钛磁铁矿精矿的金属化率可达到92.8%,还原后钒主要富集在钛渣相中,有效实现了铁与钒/钛的分离。Low grade vanadium-bearing titanomagnetite concentrates were reduced isothermally with addition of a small amount of Na2 CO3 ＋NaCl at 1 000-1 300 ℃and anthracite as reductant. Iron concentrates and vanadiumbearing titanium slag were obtained by magnetic separation. The effects of C/Fe molar ratio, reduction temperature, and reduction time on metallization degree of iron, content of V/Ti in samples, and phase transformation were investigated. The results show that C/Fe molar ratio and reduction temperature have great impacts on direct reduction process. Metallization degree is 92.8% under the conditions including C/Fe molar ratio of 1.2, reduction temperature of 1 200 ℃, and reduction time of 2 h. Vanadium is enriched in titanium slag after reduction. Efficient separation between Fe and V/Ti is achieved.

关 键 词：低品位钒钛磁铁精矿 直接还原 金属化率 分离 

分 类 号：TL212.12[核科学技术—核燃料循环与材料]