Applied Surface Science ( IF 6.3 ) Pub Date : 2022-11-15 , DOI: 10.1016/j.apsusc.2022.155703
Xingrong Zhang , Lulin Lu , Anruo Luo , Wei Xiong , Jianhua Chen
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Flotation is an interfacial chemical reaction in essence. The selective adsorption of flotation reagents on mineral surfaces leads to the transition of hydrophilicity/hydrophobicity of mineral particles, and then to regulate the floatability differences between various minerals. 5-amino-1,3,4-thiadiazole-2-thiol (ATT) is a heterocyclic ring compound, which can chelate copper ions easily and usually used as a copper corrosion inhibitor. Based on those good chelating properties with copper ions, this paper attempted to apply ATT as a chalcopyrite depressant in the flotation separation of Cu/Mo ores. The adsorption mechanism of ATT on chalcopyrite surface was explored by means of UV–vis, FTIR, contact angle and XPS analysis, and it revealed the possibility of ATT using as a selective chalcopyrite depressant in the flotation separation of Cu/Mo ores by micro-flotation tests. Finally, the adsorption morphology of ATT depressant on chalcopyrite surface was unveiled by DFT method from a microscopic level. Through these FTIR and XPS analysis, combined with DFT simulation results, it was inferred that ATT was mainly chemically adsorbed on chalcopyrite surface by SCu and N
Cu bonds. These studies confirmed that ATT was very likely to be an excellent chalcopyrite depressant in Cu/Mo flotation separation.
中文翻译:
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5-氨基-1,3,4-噻二唑-2-硫醇在黄铜矿表面的界面吸附作为 Cu/Mo 分离中的浮选抑制剂
浮选本质上是一种界面化学反应。浮选剂在矿物表面的选择性吸附导致矿物颗粒亲水性/疏水性的转变,进而调节各种矿物之间的可浮性差异。5-amino-1,3,4-thiadiazole-2-thiol (ATT)是一种杂环化合物,易螯合铜离子,常用作铜缓蚀剂。基于ATT与铜离子良好的螯合性能,本文尝试将ATT作为黄铜矿抑制剂应用于Cu/Mo矿石的浮选分离。通过紫外-可见光、红外光谱、接触角和XPS分析等手段探讨了ATT在黄铜矿表面的吸附机理,并通过微浮选试验揭示了ATT作为选择性黄铜矿抑制剂用于Cu/Mo矿浮选分离的可能性。最后,通过DFT方法从微观层面揭示了ATT抑制剂在黄铜矿表面的吸附形态。通过这些 FTIR 和 XPS 分析,结合 DFT 模拟结果,推断 ATT 主要通过 S 化学吸附在黄铜矿表面Cu 和N
Cu 键。这些研究证实,ATT 很可能是 Cu/Mo 浮选分离中优良的黄铜矿抑制剂。