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Catalytic-Oxidative Leaching of Low-Grade Complex Zinc Ore by Cu (II) Ions Produced from Copper Ore in Ammonia-Ammonium Sulfate Solution

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Abstract

The catalytic-oxidative leaching of a mixed ore, which consists of low-grade oxide copper ore and oxide zinc ore containing ZnS, was investigated in ammonia-ammonium sulfate solution. The effect of the main parameters, such as mass ratio of copper ore to zinc ore, liquid-to-solid ratio, concentration of lixivant, leaching time, and temperature, was studied. The optimal leaching conditions with a maximum extraction of Cu 92.6 pct and Zn 85.5 pct were determined as follows: the mass ratio of copper ore to zinc ore 4/10 g/g, temperature 323.15 K (50 °C), leaching time 6 hours, stirring speed 500 r/min, liquid-to-solid ratio 3.6/1 cm3/g, concentration of lixivant including ammonia 2.0 mol/dm3, ammonium sulfate 1.0 mol/dm3, and ammonium persulfate 0.3 mol/dm3. It was found that ZnS in the oxide zinc ore could be extracted with Cu(II) ion, which was produced from copper ore and was used as the catalyst in the presence of ammonium persulfate.

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Acknowledgments

The financial support of National Key Program for Basic Research of China (973 Program, Grant No. 2007CB613601) and Foundation of Hunan Educational Committee of China (Grant No. 10C1095) are acknowledged.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Jishou University, Jishou City, Hunan Province, 410083, P.R. China

    Zhi Xiong Liu (Lecturer)

  2. School of Chemistry and Chemical Engineering, Central South University, Changsha City, Hunan, 410083, P.R. China

    Zhou Lan Yin (Scientist), Hui Ping Hu (Scientist) & Qi Yuan Chen (Scientist)

Authors
  1. Zhi Xiong Liu
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  2. Zhou Lan Yin
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  4. Qi Yuan Chen
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Correspondence to Zhi Xiong Liu.

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Manuscript submitted October 26, 2011.

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Liu, Z.X., Yin, Z.L., Hu, H.P. et al. Catalytic-Oxidative Leaching of Low-Grade Complex Zinc Ore by Cu (II) Ions Produced from Copper Ore in Ammonia-Ammonium Sulfate Solution. Metall Mater Trans B 43, 1019–1026 (2012). https://doi.org/10.1007/s11663-012-9699-2

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  • DOI: https://doi.org/10.1007/s11663-012-9699-2

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