以过硫酸铵为氧化剂,研究低品位氧化铜矿在氨-硫酸铵体系氧化浸出工艺.讨论氨/铵离子摩尔比、总氨浓度,氨、硫酸铵和过硫酸铵的浓度,反应温度,液固比,反应时间和搅拌速度等操作条件对铜浸出的影响.结果表明:在92.8％的矿样粒径小于0.045 mm,氨、硫酸铵和过硫酸铵浓度分别为2.4、1.8和0.100 mol/L,浸出时间为90min,温度为30℃,液固比(mL/g)为5∶1,搅拌速度为500 r/min时的优化条件下,低品位铜矿的铜浸出率达87.7％.%The oxidative leaching of low-grade copper ore was investigated in the ammonia-ammonium sulfate solution with ammonium persulfate. The effects of different parameters on the leaching of copper, including ammonia-to-ammomum ion ratio, total ammonia concentration, concentrations of ammonia, ammonium sulfate and ammonium persulfate, temperature, liquid-to-solid ratio and stirring speed, were investigated. The result shows that the optimal conditions for the leaching of low-grade copper ore with a copper extraction 87.7% are the particle sizes of 92.8% of sample finer than 0.045 mm, the concentrations of ammonia, ammonium sulfate and ammonium persulfate are 2.4, 1.8 and 0.100 mol/L, respectively, leaching time 90 min, temperature 30 'C, liquid-to-solid ratio (mL/g) 5:1, stirring speed 500 r/min.
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