Experiment on Direct Reduction of Iron from Vanadium Extraction Tailings by Adding Carbon

The process of direct reduction of iron from vanadium extraction tailings by directly adding carbon was investigated. The effect of C/O ratio and reduction temperature and time on direct reduction of iron was analyzed by X-ray diffraction and scanning electron microscopy etc. The result shows that with the reduction temperature and time of 1200℃ and 30 min respectively,and C/O ratio of 2.5,the metallization ratio of iron can reach about 85%; the metallization ratio increases with the increase of temperature and reduction time; during the reduction,the element Fe varies following Fe₂O₃→Fe₃O₄→FeO→Fe; the quality of the iron is affected with the extension of reduction time.