Dispersive effect of low molecular weight sodium polyacrylate on pyrite-serpentine flotation system

被引：9

作者：

Zhao, Kaile ^{[1
,2
]}

Yan, Wu ^{[2
]}

Wang, Xiaohui ^{[2
]}

Gu, Guohua ^{[1
]}

Deng, Jie ^{[2
]}

Zhou, Xiong ^{[2
]}

Hui, Bo ^{[2
]}

机构：

[1] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China

[2] Chinese Acad Geol Sci, Inst Multipurpose Utilizat Mineral Resources, Chengdu 610041, Sichuan, Peoples R China

来源：

PHYSICOCHEMICAL PROBLEMS OF MINERAL PROCESSING | 2017年 / 53卷 / 02期

基金：

中国国家自然科学基金;

关键词：

dispersant; serpentine; flotation; surface potential; dispersion mechanism; SLIME-COATINGS; PENTLANDITE; ADSORPTION; ORES; SEPARATION; GANGUE; TALC; CMC;

D O I：

10.5277/ppmp170240

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, the dispersive effect of low molecular weight sodium polyacrylate (PAAS) on serpentine, and its dispersion mechanism were systematically investigated through zeta potential measurements, micro and batch flotation as well as adsorption tests. At pH 5, where flotation of iron sulphide was routinely performed, pyrite and serpentine minerals were oppositely charged, and therefore they were attracted to each other. Slime coatings of serpentine adhered to the surface of pyrite, decreasing the adsorption density of a collector on the pyrite surface, but also reducing the flotation recovery. PAAS increased the flotation recovery of pyrite by promoting dispersion between pyrite and serpentine. The effective flotation separation of pyrite from the refractory iron sulphide ore was possible by using PAAS as a dispersant. Anionic PAAS adjusted the surface potential of serpentine through adsorption on the serpentine surface and changed the interaction between pyrite and serpentine particles from attractive to repulsive, and then dispersed pyrite and serpentine.

引用

页码：1200 / 1213

页数：14

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