Research and industrial application of a vacuum separation technique for recovering valuable metals from copper dross

Yang, Bin; Huang, Daxin; Liu, Dachun; Zha, Guozheng; Jiang, Wenlong; Kong, Xiangfeng

doi:10.1016/j.seppur.2019.116309

Cited by 22 publications

(2 citation statements)

References 21 publications

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“…However, a large amount of copper soot will be produced in the smelting process [6], which not only has a high reclaim value due to its high copper content but will lead to grievous environmental pollution owing to its high arsenic content [7]. In the context of tremendous demand for copper metal and green ecological development in China [8], it is crucial to recover copper and safely solidify arsenic from copper soot.…”

Section: Introductionmentioning

confidence: 99%

Selective Separation Recovery of Copper and Arsenic from the Leaching Solution of Copper Soot

Yang

Zhang

Zhou

et al. 2022

Metals

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Through the main chemical reaction of metal ions and S2−, a new type of sulfide precipitant was first prepared and used to realize the selective separation recovery of copper and arsenic from the leaching solution of copper soot. It is proven by experimental results that the prepared sulfide precipitant could realize the efficient separation recovery of copper and arsenic. Indeed, the copper sulfide slag with Cu grade of about 47% and arsenic trisulfide slag with As operation recovery of about 98% could be obtained. The results of chemical reaction energy calculation analysis and SEM images analysis illustrate that the selective separation recovery of copper and arsenic mainly depended on the chemical reactions of sulfide precipitation. The ions of S2− and HS− produced by the prepared sulfide precipitant could react with Cu2+ and arsenic components to form CuS and As2S, respectively, in the copper and arsenic recovery procedure. In addition, the smaller solubility of CuS and the lower rate of S2− engendered by the sulfide precipitant were key to achieving the efficient separation and recovery of copper and arsenic.

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Section: Introductionmentioning

confidence: 99%

Selective Separation Recovery of Copper and Arsenic from the Leaching Solution of Copper Soot

Yang

Zhang

Zhou

et al. 2022

Metals

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“…Vacuum metallurgy technology has a good effect on improving metal recovery rate and shortening process flow in the field of minerals and metallurgy. e vacuum environment can meet the requirements of environmental protection, matters in the reaction system can be divided from the atmosphere, and the exchange of materials can be effectively controlled [13][14][15]. In the field of gold processing, vacuum technology is mainly used for the removal of arsenic and sulfur from arsenic-containing and sulfur-containing gold ores.…”

Section: Introductionmentioning

confidence: 99%

Study on Vacuum Roasting Pretreatment of Carbonaceous Gold Concentrates Based on Nonoxidation Technology

Zhang

Song

Yin

et al. 2021

Journal of Chemistry

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Carbonaceous gold ores are difficult to treat because of the “preg-robbing” by carbonaceous matters and locking by minerals. Roasting is the most commonly used method that is useful in dealing with carbonaceous gold ores. In this study, flotation gold concentrates containing sulfides and carbonaceous matters were investigated to ascertain the reaction process and the matters’ transformation characteristics in different temperatures by vacuum roasting pretreatment. Calcine and volatile condensates were characterized with several techniques. In the process of vacuum roasting, the main chemical reactions were decomposition reaction and carbothermic reduction reactions of sulfide ores, carbothermic reduction reactions of SiO2, and thermal decomposition reactions of organic carbon. The bad effects of “preg-robbing” by carbonaceous matters were greatly weakened by the thermal decomposition and carbothermal reduction. The gold locking minerals were mainly removed by reduction reactions. The sulfides were removed in ways that did not produce SO2. The removal of sulfur and carbonaceous matters during the vacuum roasting process was 95.83% and 65.38%, respectively. Direct cyanidation of the calcine extracted from 2.13% to 88.37% of the gold content with a vacuum degree of 10 Pa and roasting from 25°C to 1,200°C for 30 min.

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Green and Effective Purification of Antimony and Recovery of Precious Metals from Noble Antimony by a New Vacuum Gasification Process

Meng,

Yang,

Wei

et al. 2023

Metall Mater Trans B

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Research and industrial application of a vacuum separation technique for recovering valuable metals from copper dross

Cited by 22 publications

References 21 publications

Selective Separation Recovery of Copper and Arsenic from the Leaching Solution of Copper Soot

Selective Separation Recovery of Copper and Arsenic from the Leaching Solution of Copper Soot

Study on Vacuum Roasting Pretreatment of Carbonaceous Gold Concentrates Based on Nonoxidation Technology

Green and Effective Purification of Antimony and Recovery of Precious Metals from Noble Antimony by a New Vacuum Gasification Process

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