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在本研究中硫化铜矿石无捕收剂浮选取得了与加捕收剂浮选相同的选别指标,含铜1.88%的浸染铜矿无捕收剂浮选小型闭路试验,获得品位26.15%,回收率95.3%的铜精矿。研究结果表明,无捕收剂浮选中,黄铜矿的浮选速率比黄铁矿高,对铜-硫矿石的优先浮选有利;氧化还原电位较高的矿浆中容易实现硫化铜矿石的无捕收剂浮选;黄铜矿在酸性或碱性矿浆中的可浮性都比在自然pH状态下好;用石灰调浆能获得硫化铜矿浮选所需的pH值和稳定、适宜的氧化还原电位,对黄铁矿又有较好的抑制作用;加入硫化钠时,矿浆的氧化还原电位相应降低,但当充空气浮选时,随即上升为较高的氧化还原电位,适合于无捕收剂浮选,本研究不用硫化钠处理,也能实现硫化铜矿石无捕收剂浮选。
In the present study, copper sulphide ore-free collector flotation obtained the same sorting index as the collector flotation, and the copper-free copper-rich copper concentrate with a copper content of 1.88% had no collector flotation small closed-circuit test with a grade of 26.15 %, Recovery of 95.3% of copper concentrate. The results show that in the flotation without collector, the flotation rate of chalcopyrite is higher than that of pyrite, which is favorable for the preferential flotation of copper-sulfur ore. Copper sulphide ore is easy to be obtained in ore pulp with higher oxidation-reduction potential Of collectorless flotation; chalcopyrite floatability in acidic or alkaline pulp is better than in the natural pH state; with lime mortar can obtain the copper sulfide flotation pH value and stability, The appropriate redox potential has a good inhibitory effect on pyrite. When sodium sulfide is added, the redox potential of the slurry decreases correspondingly, but when the air flotation is filled, the redox potential rises to a higher redox potential, which is suitable In the absence of collector flotation, the study does not deal with sodium sulfide, copper sulfide ore can also achieve collectorless flotation.