Given the scarcity of conventional low-altitude high-quality copper–molybdenum resources, people gradually explore mining opportunities in elevated regions. Molybdenite in high-altitude ores is initially recovered with chalcopyrite, which is then separated and floated to produce refined molybdenite. There are few studies on the influence of the sulfide ore flotation process under high-altitude and low dissolved low-dissolved oxygen (DO) environments. In the present study, a flotation plant is designed and assembled to simulate the flotation of chalcopyrite at high altitudes by controlling the partial pressures of N/O and DO under different altitude conditions, using the DO value as a standard. UV/VIS, electrochemical, and contact angle measurements were used to reveal the effect of conditions at 4600 m DO = 4.0 mg/L at altitude on chalcopyrite–molybdenite separation. Pure mineral flotation results indicate that a low DO environment at high altitudes favors the separation process and reduces the number of inhibitors. The mechanism of chalcopyrite inhibition at high altitudes still relies on the adsorption of large amounts of Fe(Ⅲ)-O/OH and hydrophilic polysulfides on the surface. Results reveal the reason for the relatively low inhibitor dosage in the chalcopyrite–molybdenite separation flotation process under low DO conditions at high altitudes. The findings also confirm that enhanced collector removal at high altitude altitudes is conducive to implementing a pathway toward a more efficient separation flotation process.

中文翻译：

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低溶解氧对高海拔地区黄铜矿-辉钼矿分离浮选的影响


鉴于常规低海拔优质铜钼资源的稀缺性，人们逐渐探索高海拔地区的开采机会。高海拔矿石中的辉钼矿首先与黄铜矿一起回收，然后进行分离和浮选，生产精制辉钼矿。关于高海拔、低溶解氧（DO）环境下硫化矿浮选过程影响的研究较少。本研究设计并组装浮选装置，以DO值作为标准，通过控制不同海拔条件下N/O和DO的分压，模拟高海拔黄铜矿的浮选。 UV/VIS、电化学和接触角测量用于揭示海拔 4600 m DO = 4.0 mg/L 的条件对黄铜矿-辉钼矿分离的影响。纯矿物浮选结果表明，高海拔地区的低溶解氧环境有利于分离过程并减少抑制剂的数量。高海拔黄铜矿抑制机理仍然依赖于表面大量Fe(Ⅲ)-O/OH和亲水性多硫化物的吸附。结果揭示了高海拔低溶解氧条件下黄铜矿-辉钼矿分离浮选过程中抑制剂剂量相对较低的原因。研究结果还证实，在高海拔地区加强捕收剂去除有利于实现更有效的分离浮选过程。