Study on Carbothermal Sodium Reduction Process of Vanadium-titanium Magnetite Concentrate

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 magnetite 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 environment,which could be further enhanced when the iron is removed via the reduction and smelting-separation process.