Abstract The efficient separation of sulphide from low hardness minerals, especially hydrophobic gangue minerals, remains a practical challenge. The effect of the polysaccharide depressant xanthan gum on the depression of chlorite in arsenopyrite flotation was studied using potassium amyl xanthate (PAX) as the collector. In micro-flotation, xanthan gum showed a better depression performance on chlorite flotation than on arsenopyrite flotation. The selective depression mechanism of xanthan gum on arsenopyrite and chlorite surfaces was studied by adsorption tests, and Fourier transform infrared spectra (FT-IR) and molecular dynamics simulation (MDS) analyses. The results indicated that xanthan gum could selectively adsorb on chlorite surfaces involving chemisorption, while it exhibited weak physical adsorption to arsenopyrite. The chemisorption of xanthan gum on the chlorite surface was based on the interaction between –COOH groups and metal (Mg) ions.

中文翻译：

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多糖抑制剂黄原胶对绿泥石中毒砂浮选的影响

摘要 从低硬度矿物，特别是疏水性脉石矿物中有效分离硫化物仍然是一个实际挑战。以戊基黄原酸钾（PAX）为捕收剂，研究了多糖抑制剂黄原胶对毒砂浮选中亚氯酸盐的抑制作用。在微浮选中，黄原胶对绿泥石浮选的抑制性能优于毒砂浮选。通过吸附试验、傅里叶变换红外光谱（FT-IR）和分子动力学模拟（MDS）分析，研究了黄原胶对毒砂和绿泥石表面的选择性抑制机制。结果表明，黄原胶可以通过化学吸附选择性吸附在亚氯酸盐表面，而对毒砂表现出弱物理吸附。