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在 pH5至12的范围内,研究了细颗粒(通常是-2微米黄铜矿)和聚合物稳定油滴之间的反应与 pH 值以及固体重量百分数的关系。使用由部分酯化的聚甲基丙烯酸稳定的油滴和纤维素黄原酸盐作为捕收剂。使用纤维素黄原酸盐稳定的乳浊液,在 pH11的条件下,从细粒石英脉石中可以有效地分选黄铜矿。在 pH 值到矿浆浓度至少为5.1％(固体重量)条件下,可以得到满意的回收率与精矿品位。在其它 pH 值下,由于二价铜(黄铜矿上水解的)活化石英表面,选择性变差。
In the pH range of 5 to 12, the reaction between fine particles (typically -2 micron chalcopyrite) and polymer-stabilized oil droplets was studied as a function of pH and weight percent solids. Partially esterified polymethacrylate-stabilized oil droplets and cellulose xanthate were used as collectors. Chalcopyrite can be efficiently separated from fine-grained quartz gangue at a pH of 11 using a cellulose xanthate stabilized emulsion. Satisfactory recoveries and concentrate grades are obtained at pH values of at least 5.1% (solids weight). At other pHs, the selectivity deteriorates due to the activated quartz surface of divalent copper (hydrolyzed on chalcopyrite).