Effects of Galvanic Interaction between Chalcopyrite and Monoclinic Pyrrhotite on Their Flotation Separation

Minerals

Liu Yang¹  Xiaowen Zhou¹  Tingsheng Qiu¹  Huashan Yan¹  Hongliang Zhang²  Xiaohe Liu³ 

[1] College of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;Dexing Copper Mine Dashan Concentrator, Jiangxi Copper Group, Shangrao 334200, China;Henan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, Zhengzhou 450001, China;

关键词: chalcopyrite;    monoclinic pyrrhotite;    galvanic interaction;    flotation;    interactive influence;   

DOI  :  10.3390/min12010039

来源: DOAJ

【 摘 要 】

The galvanic interaction between chalcopyrite and monoclinic pyrrhotite and its effect on flotation separation were studied using monomineral flotation tests, adsorption capacity tests, X-ray photoelectron spectroscopy (XPS) characterization, and scanning electron microscopy (SEM) test. These results showed that the interaction promoted the reduction of O₂ on the cathodic chalcopyrite surface and accelerated the generation of Fe(OH)₃, which was not conducive to collector adsorption; hence, the flotation recovery decreased by 10–16%. On the other hand, galvanic interaction accelerated the oxidation of S on the anodic monoclinic pyrrhotite surface to S₀ or SO₄²⁻ and produced a large amount of H⁺, thus preventing the formation of Fe(OH)₃. Meanwhile, the Cu²⁺ eluted from chalcopyrite surface activated monoclinic pyrrhotite; hence, the flotation recovery increased by 3–10%. Galvanic interaction reduced the floatability difference between the two minerals, and the separation difficulty was significantly increased. Even with an increase in the amount of lime, the separation could not be improved.

【 授权许可】

Unknown