Study on the production of Fe-V alloy by the reduction of vanadium-enriched slag using aluminum dross
In order to solve the problems of low valuable metal yield and high production cost in the process of ferrovanadium production,this paper proposed the use of aluminum ash as a reductant to dir-ectly reduce the vanadium-rich slag for the preparation of ferrovanadium alloys.The effect of different reduction conditions on the yield of valuable metal in the process of aluminum-ash reduction of vana-dium-riched slag was studied.The results show that with the reduction temperature increasing from 1 773 K to 1 873 K,the yield of Fe increases from 51.8％to 95.6％,the yield of Mn increases from 16.7％to 84.2％,the yield of Cr increased from 2.5％to 87.9％,the yield of V increased from 0.5％to 91.8％.With the basicity increasing from 1.0 to 1.5,the yield of Fe,Cr,Mn and V increases from 72.5％,51.7％,35.8％and 11.4％to 95.6％,84.2％,87.9％and 91.8％,respectively.Under the optimal reduction conditions(the temperature of 1873 K,the basicity of 1.5,the reduction time of 30 min),the metal grades of Fe and V in the prepared vanadium ferroalloy are 28.18％and 35.01％,respectively,and the mass ratio of V/Fe in the alloy product is 1.24.
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