Leaching of Willemite Concentrate in Sulfuric Acid Solution at High Temperature

Hongsheng Xu (), Yanan Qian, Quanfa Zhou (), Chang Wei, Qi Wang, Wenjie Zhao, Binglong Zhu, Fei Tong, Fang Ren, Min Zhang and Jingxu Xu
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Hongsheng Xu: School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China
Yanan Qian: School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China
Quanfa Zhou: Jiangsu Key Laboratory of Electronic Waste Resources Recycling, School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China
Chang Wei: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
Qi Wang: School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China
Wenjie Zhao: School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China
Binglong Zhu: School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China
Fei Tong: School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China
Fang Ren: School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China
Min Zhang: School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China
Jingxu Xu: School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China

Sustainability, 2022, vol. 15, issue 1, 1-13

Abstract: The technical practicability of high temperature leaching process using willemite concentrate as the materials was developed in the study for extracting base metals. The factors affecting the leaching rates of zinc, iron, and silica from willemite concentrate were investigated, and optimized for maximum zinc extraction and minimum iron and silica dissolution to meet the needs of solution purification. Under the studied conditions (413 K, 0.81 mol/L sulfuric acid, duration 60 min, liquid to solid ratio (L/S) 10 mL/g, agitation speed 550 rpm, particle size of −250 + 300 mesh and 1.4 MPa pressure), up to 97% zinc was leached into lixivium together with approximate 5.72% SiO 2 and 21.11% Fe. The performance of liquid-solid separation was also improved with decreasing silica dissolution under the experimental conditions used.

Keywords: high temperature leaching; willemite; zinc extraction; removing impurities (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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