通过PAAS和GA之间的表面协同作用强化黄铜矿与镁硅酸盐矿物的浮选分离

Enhancing flotation separation of chalcopyrite and magnesium silicate minerals by surface synergism between PAAS and GA.

作者信息

Chen Zhiqiang, Wang Yanhong, Luo Liqun, Peng Tiefeng, Guo Feng, Zheng Mingyu

机构信息

Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, China.

The School of Minerals Processing and Bioengineering, Central South University, Changsha, China.

出版信息

Sci Rep. 2021 Mar 18;11(1):6368. doi: 10.1038/s41598-021-85984-y.

DOI:10.1038/s41598-021-85984-y

PMID:33737709

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7973509/

Abstract

Separation effects of sodium polyacrylate (PAAS) and gum Arabic (GA) on flotation of chalcopyrite and magnesium silicate minerals using potassium butyl xanthate (PBX) as collector were investigated by micro-flotation experiments, zeta potential, Infrared spectral (IR), SEM-EDS, XPS analysis and copper sulphide ore beneficiation test. The micro-flotation experiments and zeta potential measurements showed that combined depressant consisting of PAAS and GA could efficiently reduce the recoveries of mixed minerals of serpentine and talc more than 25%, while that of chalcopyrite remained above 70% at pH 9.2. Infrared spectral (IR), SEM-EDS and XPS analysis showed that PAAS chemically reacted with Mg on the surface of serpentine, while GA adsorbed on talc surface mainly via physical interaction and hydrogen bond may also play a role. Surface synergism between PAAS and GA was investigated by turbidity test and its depression mechanism was proposed. The technology feasibility of using PAAS and GA to improve the copper sulphide ore flotation performance was verified through artificial mixed ore flotation and laboratory closed-flotation operation.

摘要

通过微浮选实验、ζ电位、红外光谱（IR）、扫描电子显微镜-能谱分析（SEM-EDS）、X射线光电子能谱分析（XPS）以及硫化铜矿石选矿试验，研究了聚丙烯酸钠（PAAS）和阿拉伯树胶（GA）以丁基黄原酸钾（PBX）为捕收剂时对黄铜矿和硅酸镁矿物浮选的分离效果。微浮选实验和ζ电位测量结果表明，由PAAS和GA组成的组合抑制剂能有效降低蛇纹石和滑石混合矿物的回收率超过25%，而在pH值为9.2时黄铜矿的回收率仍保持在70%以上。红外光谱（IR）、扫描电子显微镜-能谱分析（SEM-EDS）和X射线光电子能谱分析（XPS）表明，PAAS与蛇纹石表面的Mg发生化学反应，而GA主要通过物理作用吸附在滑石表面，氢键也可能起作用。通过浊度试验研究了PAAS和GA之间的表面协同作用，并提出了其抑制机理。通过人工混合矿浮选和实验室闭路浮选作业验证了使用PAAS和GA提高硫化铜矿石浮选性能的技术可行性。