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本文介绍了使用不同气体 (空气和氮气等 )进行浮选电位调控的新方法 ,并给出了一种复杂铜铅锌硫化矿和两种金矿使用该方法进行电位调控浮选的试验结果。使用该方法 ,在浮选中电位调控的灵敏度为 2～ 5mV。从复杂矿石中浮选铜矿物时 ,电位控制浮选的选择性比电位不控制时显著提高。在低电位时硫化矿的回收率很低 ,而过度充气造成的高电位则会降低选择性。在矿物电极电位约为 0mV(相对标准氢电极电位 )时获得最佳选择性。在金矿石的浮选中通过控制电位 ,诸如黄铁矿、毒砂等铁和砷的矿物的回收率可以降到最低 ,金矿浮选的最佳电位在 + 2 5 0～ + 30 0mV(SHE)。
In this paper, we introduce a new method of flotation potential control using different gases (air and nitrogen, etc.), and present the results of a complex Cu-Pb-Zn sulphide ore sulphide ore and two kinds of gold ore using this method for potential-controlled flotation. Using this method, the sensitivity of potential regulation in flotation is 2 ~ 5mV. When flotation of copper minerals from complex ores, the selectivity of potential-controlled flotation increases significantly over the uncontrolled potential. Sulphide recovery is low at low potentials, while high potentials caused by over-aeration reduce selectivity. The best selectivity is obtained when the mineral electrode potential is about 0 mV (relative to the standard hydrogen electrode potential). In the flotation of gold ore by controlling the potential, such as pyrite, arsenopyrite and other iron ore arsenic recovery rate can be reduced to a minimum, the optimal flotation potential of gold in the +250 ~ +30 0mV ( SHE).