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| Citation: |
LU Liang, LIANG Shuang, ZHANG Xingrong, ZHU Yangge, HU Zhen, WANG Chengxing. Advanced Research on Galena Depressant in Copper-Lead Sulfides Flotation Separation[J]. Conservation and Utilization of Mineral Resources, 2020, 40(2): 105-111. DOI: 10.13779/j.cnki.issn1001-0076.2020.02.014
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In the flotation separation of complex polymetallic sulfide ore, the separation of copper sulfide and lead sulfide has always been a challenge due to the complex dissemination relationship and the similar floatability. Therefore, the application of highly selective inhibitors solves a key factor in separation. In this paper, the common galena depressants and their depressing mechanism were introduced from the perspective of inorganic depressants and organic depressants. Inorganic depressants are mainly including dichromate, sulfite and combined depressants. Dichromate is gradually being replaced by less-chromium process and non-chromium processes due to the high toxicity. Organic depressants have the advantages of diversity, wide sources, and low toxicity. The small-molecule organic depressants have better selectivity, while their inhibitory ability is relatively poor. The large-molecule organic depressants have a stronger depressing ability but poorer selectivity, which are usually used in combination with inorganic depressants. Generally speaking, the depressing mechanism of the two kinds of depressants is mainly to form a hydrophilic film on the surface of galena through physical or chemical adsorption. With more and more attention being paid to sustainable development and environmental protection, green and efficient galena depressants have become the key research direction in the field of mineral processing.
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