Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第22卷    第5期    总第158期    2012年5月

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文章编号:1004-0609(2012)05-1488-09
低品位氧化铜矿氨−硫酸铵体系过硫酸铵氧化浸出
刘志雄1, 2,尹周澜1,胡慧萍1,陈启元1

(1. 中南大学 化学化工学院,长沙 410083;2. 吉首大学 化学化工学院,吉首 416000)

摘 要: 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90 min,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%。

 

关键字: 低品位氧化铜矿;氧化浸出;氨−硫酸铵;过硫酸铵

Oxidative leaching of low-grade copper ore in ammonia-ammonium sulfate solution with ammonium persulfate
LIU Zhi-xiong1, 2, YIN Zhou-lan1, HU Hui-ping1, CHEN Qi-yuan1

1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
2. College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China

Abstract: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- ammonium 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 ℃, liquid-to-solid ratio (mL/g) 5:1, stirring speed 500 r/min.

 

Key words: low-grade copper ore; oxidative leaching; ammonia-ammonium sulfate; ammonium persulfate

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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