中文摘要：

以云南汤丹高碱性、低品位氧化铜浸出尾矿为研究对象,采用NH3.H2O-（NH4）2CO3体系添加氧化剂浸出,详细考察了浸出时间、反应温度、液固比、总氨浓度及c（NH4＋）/c（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,得到了该尾矿的最佳浸出条件。结果表明,液固比10∶1,浸出温度40℃,加入0.25 mL/g H2O2,反应2 h;然后添加NH3.H2O及（NH4）2CO3,铵离子浓度3.2 mol/L,氨水浓度0.8 mol/L,继续反应4 h,尾矿中铜的浸出率达到了72.3%。

英文摘要：

The leaching of copper from the tailings of refractory copper oxide ore which comes from Tangdan in Yunnan Province in China by aqueous ammonium chloride/ ammonia solutions has been studied.The results show that leaching time,the temperature,the concentration of ammonium chloride and ammonia,the solid-to-liquid ratio,the amount of the Oxidant,additional order of the oxidant,oxidation time have favorable influence on the leaching ratio of copper oxide ores.The optimum leaching conditions are found to be： 10/1 liquid-to-solid ratio,40 ℃,adding to H2O2（2.5 mL/g）,after 2 hours,then add to（NH4）2CO3 and NH3·H2O,c（NH＋4）=3.2 mol/L,c（NH3）=0.8 mol/L,continue reacting 4 hours.More than 72.3% of copper was effectively recovered.