为了实现钒钛磁铁精矿的低温综合利用,采取碳热钠化工艺降低还原和熔分温度,考察了铁、钒、钛的富集回收情况.结果表明,钠化剂显著改善了钒钛磁铁精矿的还原及熔分效果,当钠化比为1.2时,1100℃还原60rmin即可达到90％以上的金属化率,1 250℃以上的温度下熔分后,铁的收得率达到96％,钒在铁水中的富集率为75％.熔分渣在无酸环境下经湿法处理后TiO2含量达到77％,经还原熔分去除铁后品位可进一步提升.
In order to realize the comprehensive utilization of vanadium-titanium magnetite concentrate at lower temperature,carbothermal sodium-treatment was adopted to reduce the reduction and smelting-separation temperatures,and the enrichment recycling of iron,vanadium as well as titanium was investigated.The sodium agent improves the reducibility and smelting-separation performance of the vanadium titanium mag netite concentrate significantly.The metallization ratio of the sample reduced at 1 100 ℃ for 60 min with a sodium ratio of 1.2 was higher than 90％,and the iron yield reached 96％ with smelting-separation at 1 250 ℃ or higher and the enrichment ratio of vanadium in iron was 75％.Moreover,TiO2 content in the slag reached 77％ when the smelting-separated slag was treated by wet-process in acid free envimument,which could be further enhanced when the iron is removed via the reduction and smelting-separation process.
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