The galvanic interaction between chalcopyrite and pyrite in the presence of I lignosulfonate-based biopolymers and its effects on flotation performance

被引：58

作者：

Mu, Yufan ^{[1
]}

Peng, Yongjun ^{[1
]}

Lauten, Rolf A. ^{[2
]}

机构：

[1] Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia

[2] Pionera, POB 162, NO-1701 Sarpsborg, Norway

来源：

MINERALS ENGINEERING | 2018年 / 122卷

基金：

澳大利亚研究理事会;

关键词：

Pyrite depression; Chalcopyrite; Lignosulfonate-based biopolymers; Galvanic interactions; Competitive adsorption; ADSORPTION MECHANISM; COPPER ACTIVATION; SULFIDE MINERALS; SEPARATION; XANTHATE; CALCIUM; PH;

D O I：

10.1016/j.mineng.2018.03.048

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Pyrite, a gangue mineral, is commonly associated with valuable base metal sulfide minerals and the separation of pyrite from these valuable sulfide minerals by flotation is difficult. In this study, a type of biopolymers, modified from lignosulfonates, was used to reject pyrite in chalcopyrite flotation based on the previous investigations. It was found that these biopolymers selectively depressed pyrite flotation with little effect on chalcopyrite flotation. The presence of pyrite decreased the depression effect of biopolymers on chalcopyrite flotation due to the preferential adsorption of biopolymers on copper-activated pyrite as revealed by the adsorption isotherms and ToF-SIMS (Time-of-Flight Secondary Ion Mass Spectrometry) analyses. The presence of chalcopyrite increased the depression effect of biopolymers on the flotation of copper-activated pyrite due to enhanced oxidation of the copper activation product, Cu(I)S, on pyrite as a result of the galvanic interaction among Cu(I)S, pyrite and chalcopyrite.

引用

页码：91 / 98

页数：8

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