LAPSE:2019.0954
Published Article
LAPSE:2019.0954
A Novel Technology for Separating Copper, Lead and Zinc in Flotation Concentrate by Oxidizing Roasting and Leaching
Qian Zhang, Qicheng Feng, Shuming Wen, Chuanfa Cui, Junbo Liu
August 15, 2019
In this work, oxidizing roasting was combined with leaching to separate copper, lead, and zinc from a concentrate obtained by bulk flotation of a low-grade ore sourced from the Jiama mining area of Tibet. The flotation concentrate contained 7.79% Cu, 22.00% Pb, 4.81% Zn, 8.24% S, and 12.15% CaO; copper sulfide accounted for 76.97% of the copper, lead sulfide for 25.55% of the lead, and zinc sulfide for 67.66% of the zinc. After oxidizing roasting of the flotation concentrate, the S content in the roasting slag decreased to 0.22%, indicating that most sulfide in the concentrate was transformed to oxide, which was beneficial to leaching. The calcine was subjected to sulfuric acid leaching for separation of copper, lead, and zinc; i.e., copper and zinc were leached, and lead was retained in the residue. The optimum parameters of the leaching process were: a leaching temperature of 55 °C; sulfuric acid added at 828 kg/t calcine; a liquid:solid ratio of 3:1; and a leaching time of 1.5 h. Under these conditions, the extents of leaching of copper and zinc were 87.43% and 64.38%, respectively. Copper and zinc in the leaching solution could be further separated by electrowinning. The effects of leaching parameters on the extents of leaching of copper and zinc were further revealed by X-ray diffraction and scanning electron microscopy analysis.
Keywords
copper–lead–zinc of flotation concentrate, leaching, oxidizing roasting
Subject
Suggested Citation
Zhang Q, Feng Q, Wen S, Cui C, Liu J. A Novel Technology for Separating Copper, Lead and Zinc in Flotation Concentrate by Oxidizing Roasting and Leaching. (2019). LAPSE:2019.0954
Author Affiliations
Zhang Q: Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
Feng Q: Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
Wen S: Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
Cui C: Civil engineering institute, Zhengzhou Vocational University of Information and Technology, Zhengzhou 450000, China
Liu J: Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
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Journal Name
Processes
Volume
7
Issue
6
Article Number
E376
Year
2019
Publication Date
2019-06-18
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr7060376, Publication Type: Journal Article
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LAPSE:2019.0954
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doi:10.3390/pr7060376
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Aug 15, 2019
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Aug 15, 2019
 
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Calvin Tsay
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