低品位多金属矿石焙砂浸出铜锌工艺研究  

Leaching of Cu and Zn From Low-grade Polymetallic Ore Calcine

作　　者：崔涛[1] 赖浚[1] 袁野[1] 彭建蓉[1] 和晓才[1] 谢刚[1] 

机构地区：[1]昆明冶金研究院,云南昆明650031

出　　处：《湿法冶金》2015年第5期369-372,共4页Hydrometallurgy of China

摘　　要：研究了采用一次浸出—焙烧—二次浸出工艺从低品位多金属矿石焙砂中浸出铜和锌。结果表明：一次浸出的最佳条件为浸出温度60℃、初始硫酸质量浓度60g/L、浸出时间2.0h、液固体积质量比2.5∶1,最佳条件下,铜浸出率为92.65%,锌浸出率为88.74%,铁浸出率为20.83%,浸出渣率为42.73%,渣中铜和锌主要以硫化铜和硫化锌形式存在;一次浸出渣在900℃下焙烧60min,然后再进行二次浸出,铜、锌浸出率提高到98%左右,而铁浸出率保持在22%~23%。The leaching of Cu and Zn from a low-grade polymetallic ore calcine was researched by the process of leaching-roasting-leaching. The results indicate that the leaching rates of Cu, Zn and Fe are 92.65%, 88. 74% and 20. 83%, respectively, under the following optimum conditions of leaching temperature of 60 ℃ ,initial sulfuric acid concentration of 60 g/L,leaching time of 2 h and the ratio of liquid-to-solid of 2.5. The main compositions of Cu and Zn in the first leaching residue are CuS and ZnS. The leaching residue is roasted at a temperature of 900 ℃ for 60 rain then is second leached,the leaching rates of Cu and Zn can increase to about 98 %,and the leaching rate of Fe keeps at the range of 22%-23%.

关 键 词：低品位多金属矿石 焙砂 两次浸出 铜 锌 

分 类 号：TF811[冶金工程—有色金属冶金] TF813