Research on preparation of metal vanadium by carbothermal reduction
High-purity V2O5 powder was used as raw material and carbon powder was used as reducing agent.The process of preparing metals by carbothermal reduction was studied,and the effects of the amount of carbon,temperature,vacuum degree and reduction time on the products were discussed.The results show that V2O5 is a stepwise reduction with direct and indirect reduction.With a carbon ratio of 32％,the reduction temperature at 1 350 ℃,and the reduction time of 120 min,the obtained crude vana-dium solid solution phase is mainly<VO,V2C>,and the V content is about 84％.For refining condi-tions,when the temperature is controlled at 1 680 ℃,the carbon-oxygen ratio is 1.02,and the vacuum degree is below 0.1 Pa,the ductile metal vanadium product can be obtained,and the purity of vanadium reaches 99.04％.
metal vanadiumV2O5carbothermal reductioncrude vanadiumpurification
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