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Separation Science and Technology Volume 56, 2021 - Issue 1
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Adsorption

Investigation on the recovery of gold from pretreated cyanide tailings using chlorination leaching process

Haoyu Lia State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, China;b Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China;c Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming, Yunnan, China;d National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming, Yunnan, ChinaView further author information
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Shaohua Yina State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, China;b Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China;c Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming, Yunnan, China;d National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming, Yunnan, ChinaView further author information
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Shiwei Lia State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, China;b Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China;c Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming, Yunnan, China;d National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming, Yunnan, ChinaCorrespondence[email protected]
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Libo Zhanga State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, China;b Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China;c Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming, Yunnan, China;d National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming, Yunnan, ChinaView further author information
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Jinhui Penga State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, China;b Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China;c Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming, Yunnan, China;d National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming, Yunnan, ChinaView further author information
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Kun Yanga State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, China;b Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China;c Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming, Yunnan, China;d National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming, Yunnan, ChinaView further author information
Pages 45-53 | Received 21 Oct 2018, Accepted 24 Nov 2019, Published online: 26 Dec 2019
 
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ABSTRACT

In this work, a method for the extraction of gold from the cyanide tailings (CT) was investigated. Sulfuric acid was used as a pretreatment leaching solution and calcium hypochlorite was used as a chloride agent during the chlorination leaching. Under different conditions, the potential difference of the chlorination reaction is detected by electrochemical workstation. With calcium hypochlorite for chlorination leaching, under suitable conditions of calcium hypochlorite: adding amount 8%, chlorination temperature 333 K and chlorination time 2 h, gold was effectively recovered, the leaching rate is 81%. The chlorination leaching method showed a unique advantage for treating the secondary sources.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51604135], Fund of China Scholarship Council [CSC No. 201708740004], Academic New Artist Award for Doctoral Postgraduate in Yunnan Province, and Analysis and Testing Fund of Kunming University of Science and Technology [2018P20173102007].

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