Experimental Study on Pressure
Leaching of Zinc Sulfide Concentrate
and Discussion on the Latest Relevant
Progress
Haibei Wang, Shuchen Qin, Kaixi Jiang and Bangsheng Zhang
Abstract In this paper, a typical zinc sulfide concentrate has been studied in detail by
process mineralogy. Its main mineral composition and occurrence state of elements
were identified. In addition, the effects of technological conditions such as temperature and acidity on the pressure leaching were investigated. The phase transformation
of iron was analyzed and the related mechanism was explained. At the same time,
the latest experimental progress in the field of zinc pressure leaching, such as leaching process, leaching kinetics, elemental behavior, and phase transformation in the
process of pressure leaching, is also introduced.
Keywords Pressure leaching · Zinc sulfide concentrate · Latest relevant progress
Introduction
The most commonly used process in the smelting of zinc sulfide concentrate is roasting-leaching-electrodeposition [1], during which a large amount of SO 2 is generated
in the roasting process, resulting in environmental pollution. In the process of pressure leaching of zinc sulfide, elemental sulfur is generated, avoiding the generation
of SO 2 , and iron resources can be recycled by forming hematite. Therefore, pressure
leaching is a method of high reaction efficiency and is environmental friendly [2–4].
The total reaction of zinc sulfide concentrate in pressure acid leaching process is as
follows: 2ZnS + 2H 2 SO 4 + O 2 = 2ZnSO 4 + 2H 2 O + 2S. The iron ion produced
H. Wang (B) · S. Qin · K. Jiang · B. Zhang
BGRIMM Technology Group, Beijing, China
e-mail: whaibei_01@163.com
S. Qin
e-mail: qshuchen@163.com
K. Jiang
e-mail: jiangkx@bgrimm.com
B. Zhang
e-mail: zbsvictory@163.com
© The Minerals, Metals & Materials Society 2020
A. Siegmund et al. (eds.), PbZn 2020: 9th International Symposium
on Lead and Zinc Processing, The Minerals, Metals & Materials Series,
https://doi.org/10.1007/978-3-030-37070-1_75
853
Leaching of Zinc Sulfide Concentrate
and Discussion on the Latest Relevant
Progress
Haibei Wang, Shuchen Qin, Kaixi Jiang and Bangsheng Zhang
Abstract In this paper, a typical zinc sulfide concentrate has been studied in detail by
process mineralogy. Its main mineral composition and occurrence state of elements
were identified. In addition, the effects of technological conditions such as temperature and acidity on the pressure leaching were investigated. The phase transformation
of iron was analyzed and the related mechanism was explained. At the same time,
the latest experimental progress in the field of zinc pressure leaching, such as leaching process, leaching kinetics, elemental behavior, and phase transformation in the
process of pressure leaching, is also introduced.
Keywords Pressure leaching · Zinc sulfide concentrate · Latest relevant progress
Introduction
The most commonly used process in the smelting of zinc sulfide concentrate is roasting-leaching-electrodeposition [1], during which a large amount of SO 2 is generated
in the roasting process, resulting in environmental pollution. In the process of pressure leaching of zinc sulfide, elemental sulfur is generated, avoiding the generation
of SO 2 , and iron resources can be recycled by forming hematite. Therefore, pressure
leaching is a method of high reaction efficiency and is environmental friendly [2–4].
The total reaction of zinc sulfide concentrate in pressure acid leaching process is as
follows: 2ZnS + 2H 2 SO 4 + O 2 = 2ZnSO 4 + 2H 2 O + 2S. The iron ion produced
H. Wang (B) · S. Qin · K. Jiang · B. Zhang
BGRIMM Technology Group, Beijing, China
e-mail: whaibei_01@163.com
S. Qin
e-mail: qshuchen@163.com
K. Jiang
e-mail: jiangkx@bgrimm.com
B. Zhang
e-mail: zbsvictory@163.com
© The Minerals, Metals & Materials Society 2020
A. Siegmund et al. (eds.), PbZn 2020: 9th International Symposium
on Lead and Zinc Processing, The Minerals, Metals & Materials Series,
https://doi.org/10.1007/978-3-030-37070-1_75
853