熔融态钒渣氧化钙化后酸浸研究  

Vanadium Extraction by Acid Leaching after Calcification of Molten Vanadium Slag

作　　者：李昆[1,2] 宋文臣[1,2] 郑权[1,2] 李宏[1,2] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁钒钛》2013年第5期15-18,22,共5页Iron Steel Vanadium Titanium

摘　　要：把钒渣加热到熔融态直接加入CaO并吹氧,将渣中钒氧化为四价或五价与CaO形成钒酸钙,然后酸浸其中的钒,研究了钙钒比、硫酸浓度和固液比对浸出率的影响。结果表明:生成以CaV2O5为主的钒酸钙盐,在70%钒渣粒度小于0.074 mm、钙钒比0.5~0.9、浸出温度90℃、反应时间120 min、固液比1∶5、硫酸浓度20%的条件下,钒浸出率可以达到88%以上。The process of extracting vanadium from molten vanadium slag was simulated. After vanadium slag was heated to the molten state,CaO was charged and oxygen was blown into the slag,by which vanadium in the slag was oxidized into quadrivalent or pentavalent state and calcium vanadate was obtained.Then acid leaching was employed to extract vanadium. The influence of calcium to vanadium ratio,sulfuric acid concentration and solid- liquid ratio on leaching ratio was investigated. The experiment results show that the calcium vanadate is mainly CaV2O5,and with 70% of the slag's particle size smaller than0. 074mm,calcium to vanadium ratio of 0. 5 ~ 0.9,leaching temperature of 90 ℃,reaction time of 120min,solid to liquid ratio of 1∶5,and sulphuric acid concentration of 20%,vanadium leaching ratio can reach 88% or above.

关 键 词：熔融态钒渣 钙化焙烧 吹氧 钒酸钙 酸浸 

分 类 号：TF841.3[冶金工程—有色金属冶金]