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现代矿业 ›› 2011, Vol. 27 ›› Issue (3): 20-23+61.

• 采选工程 • 上一篇    下一篇

氨水-碳酸铵浸出汤丹氧化铜尾矿研究

马建业,刘云清,胡慧萍,陈启元   

  1. 中南大学化学化工学院
  • 出版日期:2011-03-08 发布日期:2011-03-10
  • 基金资助:

    国家“973”重点基础研究发展计划项目(2007CB613600-1)

On the Leaching of Copper Mine Tailings from Tangdan by NH3·H2O-(NH4)2CO3

Ma Jianye,Liu Yunqing,Hu huiping,Chen Qiyuan   

  1. School of Chemistry and Chemical Engineering, Central South University
  • Online:2011-03-08 Published:2011-03-10

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(NH+4)/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 H2O2,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%。

关键词: 氧化铜, 浸出尾矿, 氨水-碳酸铵, 浸出

Abstract: 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(NH42CO3 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.

Key words: Oxide copper, leaching tailings, Ammonia-Ammonium Carbonate, leaching