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众所周知,铜-黄铁矿矿石难选是由于铜矿物和黄铁矿可浮性相近。在选别卡累马基矿床铜-黄铁矿矿石时,优先浮选铜矿物和黄铁矿,由于黄铁矿被铜离子活化而变坏,因此,在送往选厂的类似矿石时,黄铁矿的抑制或者是靠在精选作业中创造高的氧化钙剩余浓度(约1200毫克/升)、或者是靠补充加热矿浆来实现。在这种情况下,铜、钼和金的损失颇大。提高铜精矿的质量靠有效地抑制黄铁矿,增加中间产物中的黄铁矿含量,从而引起大的循环负荷,长时间的矿浆循环(中矿在浮选回路中的停留时间达3～4小时),这就不可避免地要降低铜矿物的浮游活性。当存在黄铁矿时,硫化铜的氧化是其浮游活性降低的原因之一,并且黄铁矿经石灰溶液处理后,其抑制作用更为强烈。
It is well-known that the refractory copper-pyrite ore is due to the similar floatability of copper minerals and pyrite. In sorting the copper-pyrite ores in the Khamadi deposit, preference is given to flotation of copper minerals and pyrite due to the deterioration of the pyrite by copper ion activation and, as a result, Pyrite inhibition is either achieved by creating high residual calcium oxide concentrations (ca. 1200 mg / l) in select operations, or by replenishing the heated slurry. In this case, the loss of copper, molybdenum and gold quite. Improve the quality of copper concentrate by effectively inhibiting the pyrite, increasing the pyrite content in the intermediate product, resulting in a large cyclic load, long pulp circulation (mineral in the flotation circuit residence time up to 3 ~ 4 hours), which inevitably reduces the planktonic activity of copper minerals. Oxidation of copper sulfide is one of the reasons for the decrease in its activity of floating when the pyrite is present, and pyritization is more strongly inhibited by lime treatment.