Abstract Molybdenite and chalcopyrite is generally separated through the selective depression of chalcopyrite using potentially toxic depressants such as sodium sulfide and cyanides. In this work, xanthan gum (XG), a polymer polysaccharide, was investigated as a potential molybdenite depressant in copper-molybdenum sulfides separation. Single mineral flotation tests indicated that molybdenite could be effectively depressed by XG, while chalcopyrite was slightly affected. The artificial mixed minerals flotation tests proved that molybdenite and chalcopyrite could be selectively separated with the addition of XG. The adsorption mechanism was studied through zeta potential and infrared spectroscopy measurements. The results revealed that XG mainly adsorbed on molybdenite surfaces other than chalcopyrite. In a word, the experiments results illustrated that XG could be applied as a promising depressant in the selective flotation separation of molybdenite and chalcopyrite, which has the advantage of environment compatibility over conventional copper depressants.

中文翻译：

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黄原胶新型抑制剂选择性浮选铜钼硫化物

摘要 辉钼矿和黄铜矿通常是通过使用硫化钠和氰化物等具有潜在毒性的抑制剂对黄铜矿进行选择性抑制来分离的。在这项工作中，黄原胶 (XG) 是一种聚合物多糖，被用作铜-钼硫化物分离中潜在的辉钼矿抑制剂。单一矿物浮选试验表明XG可有效抑制辉钼矿，而对黄铜矿影响轻微。人工混合矿物浮选试验证明，加入XG可以选择性地分离辉钼矿和黄铜矿。通过zeta电位和红外光谱测量研究了吸附机制。结果表明，XG 主要吸附在黄铜矿以外的辉钼矿表面。一句话，