2011•Journal of Central South University(Science and Technology)Requires access
Extracting vanadium from high-carbon stone coal by oxidizing roasting-acid leaching method
Xinwei Liu
Open publisher page 1 citations
Abstract
Based on refractory high-carbon stone coal of Guangxi,the leaching rate of vanadium of static roasting and fluidized roasting in the same roasting and acid leaching condition was compared.The results show that the leaching rate of vanadium of fluidized roasting-acid leaching method is averagely 24% higher than that of static roasting-acid leaching method.Therefore,fluidized roasting is more favorable to leach vanadium.The optimal acid leaching condition for vanadium extraction is as follows: acid-mine ratio 0.4:1.0,leaching temperature 150 ℃,leaching time 6 h at liquid-solid mass ratio 0.8:1.0,addition of manganese dioxide 3% and addition of hydrofluoric acid 2%.Under the optimal acid leaching conditions,the rate of leaching vanadium can reach 88.26%.