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Open AccessArticle

Research on Behavior of Iron in the Zinc Sulfide Pressure Leaching Process

BGRIMM Technology Group, Beijing 100160, China
The College of Zijin Mining, Fuzhou University, Fuzhou 350108, China
Author to whom correspondence should be addressed.
Minerals 2020, 10(3), 224;
Received: 13 December 2019 / Revised: 21 February 2020 / Accepted: 24 February 2020 / Published: 29 February 2020
(This article belongs to the Special Issue Hydrometallurgical Processing of Base Metal Sulphides)
Dissolved iron exerts significant effects on mineral leaching, impurity removal, and solution purification in the zinc hydrometallurgy process. To date, iron oxidation and migration behaviors are yet to be fully understood and further research on effective regulation mechanisms of iron is required. In this paper, zinc sulfide concentrate was used as the research object. The behaviors of both Zn and Fe during pressure leaching were investigated for varying temperature, acid addition, and leaching time. At temperature of 100~160 °C, H2SO4/Zn ratio of 0.9:1–1.25:1, and leaching time of 0.5–2.5 h, the zinc extraction increased with temperature, acidity and leaching time. The iron extraction, however, varied differently with increasing temperature, acidity and leaching time: (A) it increased with temperature to 150 °C and then decreased at higher temperature, and (B) displayed an initial increase followed by a decrease with respect to the leaching time. Based on the characteristics of the residue phase, chemical phase analysis was used to analyze the residue in detail. The extent of dissolution of iron-containing minerals and the extent of precipitation of ferric ions during the leaching process were quantitatively calculated. View Full-Text
Keywords: zinc sulfide concentrate; pressure leaching; iron extraction; iron hydrolysis zinc sulfide concentrate; pressure leaching; iron extraction; iron hydrolysis
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Qin, S.-C.; Jiang, K.-X.; Wang, H.-B.; Zhang, B.-S.; Wang, Y.-F.; Zhang, X.-D. Research on Behavior of Iron in the Zinc Sulfide Pressure Leaching Process. Minerals 2020, 10, 224.

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