| 氨-硫酸铵体系中某铜矿尾矿氧化氨浸工艺研究 |
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| 引用本文： | 刘志雄,尹周澜.氨-硫酸铵体系中某铜矿尾矿氧化氨浸工艺研究[J].矿冶工程,2012,32(2):88-91. |
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| 作者姓名： | 刘志雄 尹周澜 |
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| 作者单位： | 1. 吉首大学 化学化工学院,湖南 吉首416000;中南大学化学化工学院,湖南长沙410083
2. 中南大学化学化工学院,湖南长沙,410083 |
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| 基金项目： | 国家“973”重点基础研究发展计划资助项目，湖南省教育厅资助项目 |
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| 摘 要： | 以高碱性铜尾矿为研究对象,在NH3.H2O-(NH4)2SO4体系中,以过硫酸铵为氧化剂,详细考察了浸出时间、反应温度、液固比、总氨浓度及NH3/NH4+比率、氨、硫酸铵和过硫酸铵浓度对铜浸出率的影响。实验结果表明,尾矿铜的最佳浸出条件为:搅拌速度为500 r/min,浸出温度为40℃,氨浓度2.4 mol/L,硫酸铵浓度1.0 mol/L,过硫酸铵浓度0.2 mol/L,液固比7∶1,在此条件下铜的浸出率为75.9%。
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| 关 键 词： | 铜 铜尾矿 氨-硫酸铵 氧化浸出 氨浸 |
Study on Oxidative Ammonia Leaching of Copper Mine Tailings in Ammonia-Ammonium Sulphate Solution |
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| LIU Zhi-xiong
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YIN Zhou-lan.Study on Oxidative Ammonia Leaching of Copper Mine Tailings in Ammonia-Ammonium Sulphate Solution[J].Mining and Metallurgical Engineering,2012,32(2):88-91. |
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| Authors: | LIU Zhi-xiong YIN Zhou-lan |
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| Affiliation: | 1.College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,Hunan,China;2.School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,Hunan,China) |
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| Abstract: | The oxidative ammonia leaching of copper tailings in ammonia-ammonium sulphate solution was tested with ammonium persulphate as oxidant.The effects of leaching time,reaction temperature,liquid-to-solid ratio,total ammonia concentration,the ratio of NH3/NH4+,as well as the concentration of ammonia,ammonium sulphate and ammonium persulphate on the leaching rate of copper tailings were investigated in details.Results showed that the optimum leaching conditions for such copper tailings were as follows: agitation speed was 500 r/min,reaction temperature was 40 ℃,the concentration of ammonia,ammonium sulphate and ammonium persulphate were 2.4 mol/L,1.0 mol/L and 0.2 mol/L,respectively,liquid-to-solid ratio was 7∶1.Under such conditions,the leaching rate of copper reached 75.9%. |
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| Keywords: | copper copper tailings ammonia-ammonium sulphate oxidative leaching ammonia leaching |
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