Effect of Aluminum Purity on Vanadium Loss in Slag and Alloy Composition of Ferrovanadium Smelting Process

Influence factors of low grade industrial aluminum for ferrovanadium preparation by aluminothermic reduction process were analyzed.Main components of different grades of reducing agent and its effects on vanadium loss and composition of alloy with different grades were investigated. The analysis shows that the reduction of industrial aluminum purity has little effect on the TV content in slag during the preparation of different grades of ferrovanadium.The content range of TV in three stages slag is 0.35% ~0.37%,0.67% ~0.71%,1.15% ~1.20% for FeV50 smelting and 0.20% ~0.25%,0.55% ~0.59%,0.99% ~1.07% for FeV80 smelting,when the purity of reducing agent is 99.8%,99.5% and 99%,respectively.The content of C,Si,P and Mn in alloy increases with decrease of the reducing agent grade.When the purity of industrial aluminum decreases from 99.8% to 99%,A-grade rate of FeV50 and FeV80 alloy decreases from 100% and 95% to 95% and 60%,respectively.