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Sulfuric acid leaching of high iron-bearing zinc calcine

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Abstract

Sulfuric acid leaching of high iron-bearing zinc calcine was investigated to assess the effects of sulfuric acid concentration, liquid- to-solid ratio, leaching time, leaching temperature, and the stirring speed on the leaching rates of zinc and iron. The results showed that the sulfuric acid concentration, liquid-to-solid ratio, leaching time, and leaching temperature strongly influenced the leaching of zinc and iron, whereas stirring speed had little influence. Zinc was mainly leached and the leaching rate of iron was low when the sulfuric acid concentration was less than 100 g/L. At sulfuric acid concentrations higher than 100 g/L, the leaching rate of iron increased quickly with increasing sulfuric acid concentration. This behavior is attributed to iron-bearing minerals such as zinc ferrite in zinc calcine dissolving at high temperatures and high sulfuric acid concentrations but not at low temperatures and low sulfuric acid concentrations.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 51774099 and 51364003) and the Ministry-Province Jointly Constructed Cultivation Base for State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi Zhuang Autonomous Region, China (GXKFJ16-01).

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Authors and Affiliations

  1. College of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China

    Jin-lin Yang, Ji-guang Liu, Han-xin Xiao & Shao-jian Ma

  2. Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi Zhuang Autonomous Region, Guangxi University, Nanning, 530004, China

    Jin-lin Yang & Shao-jian Ma

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  1. Jin-lin Yang
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  2. Ji-guang Liu
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Correspondence to Shao-jian Ma.

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Yang, Jl., Liu, Jg., Xiao, Hx. et al. Sulfuric acid leaching of high iron-bearing zinc calcine. Int J Miner Metall Mater 24, 1211–1216 (2017). https://doi.org/10.1007/s12613-017-1513-3

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