汤丹氧化铜矿石尾矿在氨水-碳酸铵溶液中的浸出试验研究  

Leaching of Copper From Tailing in Tangdan in NH_3·H_2O-(NH_4)_2CO_3 System

作　　者：马建业[1] 刘云清[1] 胡惠萍[1] 陈启元[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《湿法冶金》2012年第1期20-24,共5页Hydrometallurgy of China

基　　金：国家重点基础研究发展计划资助项目(2007CB613600-1)

摘　　要：研究了云南汤丹高碱性低品位氧化铜矿尾矿在NH3.H2O-(NH4)2CO3体系中的浸出,考察了浸出时间、反应温度、液固体积质量比、总氨浓度及[NH4+]/[NH3]、氧化剂用量、氧化剂添加顺序、氧化时间等因素对铜浸出率的影响,确定了最佳浸出条件。结果表明:最优浸出条件为液固体积质量比10∶1,浸出温度40℃,加入H2O2作氧化剂,用量为0.25mL/g,反应2h;然后添加NH3.H2O及(NH4)2CO3,控制c(NH4+)=3.2mol/L,c(NH3)=0.8mol/L,继续反应4h,铜浸出率达72.3%。The leaching of copper from tailing of refractory copper oxide ore which comes from Tangdan in Yunnan Province,China in aqueous ammonia-ammonium carbonate system has been studied.The results show that leaching time,temperature,concentration of ammonium,solid-to-liquid ratio,amount and additional order of oxidant,oxidation time have favorable influence on the leaching of copper.The optimum leaching conditions are found to be liquid-to-solid ratio of 10/1,temperature of 40 ℃,H2O2 adding amount of 2.5 mL/g after 2 hours,then adding（NH4）2CO3 and NH3·H2O,c（NH＋4）=3.2 mol/L,c（NH3）=0.8 mol/L,further reacting 4 hours.More than 72.3% of copper was effective recovered.

关 键 词：氧化铜矿石 浸出尾矿 氨-碳酸铵体系 浸出 铜 

分 类 号：TD952[矿业工程—选矿]