摘要
为了降低钒钛磁铁矿的还原和熔分温度,提高钛与钒的回收率,采取碳热钠化还原法处理钒钛磁铁矿,研究了钠化剂对钒钛磁铁矿还原以及熔分后钛、钒分布的影响。结果表明,钠化剂能显著改善钒钛磁铁矿的还原性以及磁选和熔分效果,钠化比为1.2时,1 100℃还原60 min即可达到90%以上的金属化率,磁选后铁的收得率达到92%以上,铁品位接近80%。1 450℃以上的温度熔分后,铁的收得率高于95%,钒在铁水中的分配比为91%,熔分渣水洗后w(TiO_2)达到56%。
In order to reduce the reduction and smelting-separation temperatures of vanadium-bearing titanomagnetite, and improve the recovery rate of Ti and V, the carbothermic reduction in combination with sodium-treatment was studied, and the effects of sodium agent on reduction as well as the distribution of Ti and V after smelting-separation were discussed. The sodium agent significantly improves the reducibility, the magnetic separation as well as the smelting-separation performance of vanadium-bearing titanomagnetite, the metallization ratio reached 90% at 1 100 ℃ for 60 min when the sodium ratio was 1.2, and the fine iron concentrate with a iron grade of 80% as well as iron yield of 92% was obtained after magnetic separation. The iron yield was higher than 95%, and the distribution ratio of V reached 91% when the sample was smelting-separated at 1 450 ℃. Moreover, w（TiO2） in slag reached 56% when the smelting-separation slag was washed in water.
出处
《钢铁》
CAS
CSCD
北大核心
2016年第10期6-9,共4页
Iron and Steel
基金
国家自然科学基金资助项目(51404075)
关键词
钒钛磁铁矿
碳热钠化还原
磁选
熔分
vanadium-bearing titanomagnetite
carbothermic sodium-treatment reduction
magnetic separation
smelting-separation
