中文摘要：

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%。

英文摘要：

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.