An innovative option for the activation of chalcopyrite flotation depressed in a high alkali solution with the addition of acid mine drainage

被引：6
作者：
Bai, Shao-jun [1 ,2 ,3 ]
Li, Jie [1 ]
Yuan, Jia-qiao [1 ]
Bi, Yun-xiao [1 ]
Ding, Zhan [1 ]
Dai, Hui-xin [1 ,2 ]
Wen, Shu-ming [1 ,2 ,3 ]
机构：
[1] Kunming Univ Sci & Technol, Fac Land Resource Engn, Kunming 650093, Peoples R China
[2] Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cle, Kunming 650093, Peoples R China
[3] Kunming Univ Sci & Technol, Yunnan Key Lab Green Separat & Enrichment Strateg, Kunming 650093, Peoples R China
来源：
JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2023年 / 30卷 / 03期
基金：
中国国家自然科学基金;
关键词：
acid mine drainage; depressed-chalcopyrite; activation; hydrophobicity; localized electrochemical impedance spectroscopy; RESOURCE RECOVERY; COPPER MINE; PYRITE; REMEDIATION; TAILINGS; WATER; MECHANISMS; OXIDATION; SULFATE; METALS;
D O I：
10.1007/s11771-023-5239-2
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Acid mine drainage (AMD) released from copper sulfide contains a large quantity of sulfuric acid and heavy metals, thus being a threat to the surrounding ecosystem. In this study, AMD is used to evaluate options for activation of chalcopyrite depressed by a high alkali solution (HAS). The results showed the flotation recovery of chalcopyrite inhibited by HAS could be increased by similar to 12% with a volume ratio of AMD to HAS of 3:1. AMD promoted desorption of calcium components on chalcopyrite surfaces, and the adsorption of copper ions increased Cu-active sites on the mineral surfaces. Eventually, the copper atomic concentration of chalcopyrite surface increased by 2.2%, and the Ca-O/OH content decreased by 33.24%. Meanwhile, the area ratios of monosulfide (S-2(-)) and disulfide (S-2(2-)) increased by 14.67% and 23.96%. Adsorption and localized electrochemical impedance spectroscopy (LEIS) confirmed that the average impedance of chalcopyrite surface obviously decreased from about 1.30x10(5) Omega to 1.13x10(5) Omega, and the adsorption amount of sodium isoamylxanthates (SIX) on the chalcopyrite sample increased by 1.99 mg/g. AMD promotes the adsorption of SIX and improves the hydrophobicity of chalcopyrite significantly. This study provided an innovative option for the comprehensive utilization of AMD, as well as the recovery of chalcopyrite from copper sulfide tailings.
引用
收藏
页码：811 / 822
页数：12
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