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在浮选过程中 ,电化学电位是一个控制硫化矿物回收率及选择性的重要参数。本研究的目的是在含铂族矿物的矿石化学调浆及浮选过程中利用电化学电位测量法来了解各种矿物的浮选性能指标。在浮选的调浆阶段记录硫化矿物电极电位。改变磨矿介质和调节pH均会改变矿浆的化学条件。在任何条件下 ,矿物电极的混合电位会在 10 0mV范围内变化 ,并按如下顺序增加 :磁黄铁矿、镍黄铁矿、黄铜矿、黄铁矿和铂。加入CuSO4 会使矿浆电位提高 ,而加入黄药会使电位降低。在加入药剂后不同矿物电极的电位变化值并不相同 ,而矿物回收率变化趋势是 :黄铜矿 >镍黄铁矿 >磁黄铁矿。不同的磨矿介质和调浆条件对黄铜矿的回收率没有影响。在现场磨矿矿浆中 ,甚至混合电位与实验室测得的电位相似时 ,磁黄铁矿也会被抑制。这大概是现场磨矿分级过程中的过度氧化造成的。酸调浆提高了磁黄铁矿的回收率 ,这是由于清洗掉了矿物表面上的亲水氧化铁 /硫氧组分 ,同时加强了矿物表面与黄药的反应。当磁黄铁矿的混合电位低于双黄药形成的平衡电位时 ,磁黄铁矿的浮选受到轻微的抑制
During flotation, the electrochemical potential is an important parameter that controls the recovery and selectivity of sulfide minerals. The purpose of this study is to understand the flotation performance of various minerals using electrochemical potentiometry in the chemical plating and flotation of ores containing platinum group minerals. Vulcanized mineral electrode potentials were recorded during the slurrying phase of flotation. Changing the grinding media and adjusting the pH will change the chemistry of the slurry. The mixing potential of the mineral electrode varies at 10 0 mV under any conditions and increases in the following order: pyrrhotite, pentlandite, chalcopyrite, pyrite, and platinum. Addition of CuSO4 will increase the potential of the pulp, but the addition of xanthate will decrease the potential. The potential changes of different mineral electrodes after adding the drug are not the same, and the trend of mineral recovery is chalcopyrite> pentlandite> pyrrhotite. Different grinding media and conditioning conditions have no effect on chalcopyrite recovery. Magnetite can also be suppressed in field grinding slurries even when the mixing potential is similar to the one measured in the laboratory. This is probably caused by excessive oxidation during field grinding and classification. Acid slurring increases the pyrrhotic recovery because of the cleansing of the hydrophilic iron oxide / sulfur-oxygen component on the surface of the mineral while enhancing the mineral surface reaction with the xanthate. The flotation of pyrrhotite was slightly inhibited when the mixed potential of pyrrhotite was lower than the equilibrium potential of lubexanthin