Experimental Study on Beneficiation of a High Zinc Refractory Copper-Zinc Sulfide Ore from Dongchuan County of Yunnan Province

DONG Jifa; FANG Jianjun; HE Haiyang; QIU Zhilian; KOU Qingjun

doi:10.13779/j.cnki.issn1001-0076.2021.05.013

2021 Vol. 41, No. 5

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DONG Jifa, FANG Jianjun, HE Haiyang, QIU Zhilian, KOU Qingjun. Experimental Study on Beneficiation of a High Zinc Refractory Copper-Zinc Sulfide Ore from Dongchuan County of Yunnan Province[J]. Conservation and Utilization of Mineral Resources, 2021, 41(5): 97-104. doi: 10.13779/j.cnki.issn1001-0076.2021.05.013

Citation:

DONG Jifa, FANG Jianjun, HE Haiyang, QIU Zhilian, KOU Qingjun. Experimental Study on Beneficiation of a High Zinc Refractory Copper-Zinc Sulfide Ore from Dongchuan County of Yunnan Province[J]. Conservation and Utilization of Mineral Resources, 2021, 41(5): 97-104. doi: 10.13779/j.cnki.issn1001-0076.2021.05.013

Experimental Study on Beneficiation of a High Zinc Refractory Copper-Zinc Sulfide Ore from Dongchuan County of Yunnan Province

1.
Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China
2.
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming 650093, China

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Corresponding author: FANG Jianjun

Received Date: 10 October 2021

Publish Date: 25 October 2021

Abstract

Abstract

In a copper-zinc sulfide ore in Dongchuan, Yunnan Province, the Cu grade is 0.64% and the Zn grade is 6.21%. The main gangue minerals include quartz, sericite and calcite.Most of the minerals in the ore are composed of intergrowth.The low degree of monomer dissociation is unfavorable, causing difficulty in the separation copper and zinc. The selective flotation process of zinc suppression and copper flotation is adopted for the ore. Under the condition that the grinding fineness is -0.074 mm, accounting for 80%, adjust the pH with lime, select the combination of zinc sulfate and sodium pyrosulfite to inhibit sphalerite for copper roughing, Z-200 as the collector, copper sulfate as the activator for zinc roughing, isobutyl xanthate as the collector, and adopt the process of "one roughing, one scavenging and two cleaning" for copper and zinc. Among them, the copper roughing concentrate needs to be regrinded to a fineness of -0.038 mm, accounting for 90%.The tailings of the first copper cleaning shall be scavenging. Finally, through the closed-circuit process tests, the copper concentrate with Cu grade of 27.87% and Cu recovery of 75.17% and the zinc concentrate with Zn grade of 49.23% and Zn recovery of 94.48% were obtained. The copper concentrate contains 5.41% zinc, the zinc concentrate contains 1.03% copper, and the mutual content of copper and zinc in the concentrate was low, and the separation of copper and zinc was realized.
- sulfide ore /
- copper/zinc separation /
- zinc suppression and floating copper /
- regrinding /
- flotation

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