某锰银矿富银浸出渣的硫脲浸出研究  

Thiourea Leaching of Silver-rich Leach Residue of Some Manganese-silver Ore

作　　者：徐本军[1] 丁先胜[1] 黄彩娟[1] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550003

出　　处：《矿冶工程》2013年第4期88-90,共3页Mining and Metallurgical Engineering

摘　　要：对云南某锰银矿采用生物质还原剂-硫酸介质下预处理,得到的富银渣采用硫脲法进行银的富集试验研究。得出最佳试验条件为:矿样的粒度为-0.074 mm粒级占75%左右,浸出pH值为1.5,硫脲用量10 kg/t,浸出温度35℃,浸出时间3 h,浸出液固比4∶1。在最佳试验条件下银的回收率达到78%以上。硫脲法具有选择性好、无毒性等优点。Pretreatment of Yunnan manganese-silver ore was carried out with biomass as reduetant in sulfuric acid. The enrichment experiment was made on the obtained silver-rich residues using thiourea method. The optimum experimental conditions are as follows ： size fraction of ore sample of 75 % - 0. 074 mm, leaching pH value of 1.5, thiourea dosage of 10 kg/t, leaching temperature of 35 ~C, leaching time of 3 hours and leaching liquid-solid ratio of 4： 1. Under the optimal conditions, the recovery of silver reached to more than 78%. The thiourea method has the advantages of good selectivity and non-toxicity.

关 键 词：锰银矿 富银渣 硫脲 浸出 

分 类 号：TF111[冶金工程—冶金物理化学]