Factors on Leaching Zinc and Copper from Zinc Leach Residue

Li Jiao Yang; Nan Chun Chen; Xia Ping Zhong; Jun Gao; Yao Xiu Lang; Zhen Feng Wang; Chang Miao Liu; Zhao Yang Wu

doi:10.4028/www.scientific.net/KEM.633.169

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 633Factors on Leaching Zinc and Copper from Zinc...

Factors on Leaching Zinc and Copper from Zinc Leach Residue

Abstract:

It is found that cuprous sulfite, zinc sulfate and zinc sulfide were the main phases of copper and zinc in zinc leach residue, through analyzing its composition and phase characteristics by XRF and XRD. The method that cooperate sulfuric acid leaching with oxidant was chosen. 60 g/L H₂SO₄ at 60 °C for 2 h with 4% KMnO₄ and liquid/solid ratio of 5..1, 84.29 % of Cu and 92.02 % of Zn are extracted. The ion concentration of copper and zinc are tested by UV-VIS spectrophotometer and EDTA titration respectively. The results show that the amount of acid is sufficient for leaching at the condition of 60 g/L H₂SO₄ and liquid/solid ratio of 5..1. At the same time, copper change from low valence into high valence after adding KMnO₄ which strengthen the leaching, and the chemical reaction can reach balance at 60 °C for 2 h. This method has good extraction effect on copper and zinc.

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Key Engineering Materials (Volume 633)

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169-172

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.633.169

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Online since:

November 2014

Authors:

Li Jiao Yang, Nan Chun Chen*, Xia Ping Zhong, Jun Gao, Yao Xiu Lang, Zhen Feng Wang, Chang Miao Liu, Zhao Yang Wu

Keywords:

Copper, Leaching, Zinc

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