普鲁兰多糖作为一种用于黄铜矿和辉钼矿浮选分离的环保型抑制剂
Pullulan Polysaccharide as an Eco-Friendly Depressant for Flotation Separation of Chalcopyrite and Molybdenite.
作者信息
Yang Wenhui, Qiu Tingsheng, Qiu Xianhui, Yan Huashan, Jiao Qinghao, Ding Kaiwei, Zhao Guanfei
机构信息
School of Resource and Environment Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
Jiangxi Province Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
出版信息
ACS Omega. 2024 Jun 25;9(27):29557-29565. doi: 10.1021/acsomega.4c02464. eCollection 2024 Jul 9.
It is difficult to separate molybdenite and chalcopyrite by froth flotation due to the good floatability of the two minerals. In this paper, the separation of copper-molybdenum sulfide minerals was realized by using pullulan polysaccharide (PU) as the depressant. The flotation test results showed that the copper concentrate grade increased from 16.24 to 29.86%, and the copper concentrate recovery reached 83.55% under low alkali conditions. The selective separation mechanism of the two minerals by PU was revealed through contact angle measurements, ζ-potential measurements, Fourier transform infrared (FTIR) spectroscopy analyses, and X-ray photoelectron spectroscopy (XPS) analyses. The ζ-potential and contact angle results showed that PU is more easily adsorbed on molybdenite to strengthen the hydrophilicity of molybdenite. The FTIR and XPS results showed that PU is adsorbed on molybdenite by physical interactions, and hydrophobic interactions and hydrogen bonding play a major role.
由于辉钼矿和黄铜矿这两种矿物的良好可浮性，通过泡沫浮选法分离它们很困难。在本文中，通过使用普鲁兰多糖（PU）作为抑制剂实现了铜钼硫化物矿物的分离。浮选试验结果表明，在低碱条件下，铜精矿品位从16.24%提高到29.86%，铜精矿回收率达到83.55%。通过接触角测量、ζ电位测量、傅里叶变换红外（FTIR）光谱分析和X射线光电子能谱（XPS）分析揭示了PU对这两种矿物的选择性分离机制。ζ电位和接触角结果表明，PU更容易吸附在辉钼矿上以增强辉钼矿的亲水性。FTIR和XPS结果表明，PU通过物理相互作用吸附在辉钼矿上，疏水相互作用和氢键起主要作用。
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