The depression of copper-activated pyrite in flotation by biopolymers with different compositions

被引：36
|
作者：
Mu, Yufan [1 ]
Peng, Yongjun [1 ]
Lauten, Rolf A. [2 ]
机构：
[1] Univ Queensland, Sch Chem Engn, St Lucia, Qld 4072, Australia
[2] Pionera, POB 162, NO-1701 Sarpsborg, Norway
来源：
MINERALS ENGINEERING | 2016年 / 96-97卷
基金：
澳大利亚研究理事会;
关键词：
Pyrite; Copper activation; Biopolymer; Flotation; Depression; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; CALCIUM LIGNOSULFONATE; SELECTIVE DEPRESSION; ADSORPTION MECHANISM; XANTHATE ADSORPTION; SULFIDE MINERALS; MOLECULAR-WEIGHT; AQUEOUS-SOLUTION; ETHYL XANTHATE; OXIDATION;
D O I：
10.1016/j.mineng.2016.06.011
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The depression of pyrite flotation is normally difficult especially when pyrite is activated by copper ions. In this study, different biopolymers, modified from lignosulfonate, were examined to depress the flotation of copper-activated pyrite. It was found that the biopolymers (DP-1775, DP-1777 and DP-1778), differing in composition, were able to depress the flotation of copper-activated pyrite. The depression was associated with the copper(I)-biopolymer complex formed on pyrite surface which enhanced the oxidation of copper(I) and inhibited xanthate adsorption. While the molecular weight corresponded to the adsorption capacity of biopolymers on pyrite, the content of functional groups of biopolymers interfered with xanthate adsorption. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：113 / 122
页数：10
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