吴宅银铅锌矿床硫化矿石无氰浮选工艺的药剂研究

Research on prescription of cyanogenless flotation process in Wuzai lead, Zinc and Silver deposit, Suzhou

60年代前,我国在多金属硫化矿浮选方面采用氰化物作为闪锌矿与黄铁矿的抑制剂。但氰化物有剧毒,污染生态环境。同时从工艺上考虑,当浮选矿浆中含有可溶性铜盐或铁盐时,这些盐使氰化钠的作用效力大为降低。矿石中含有金、银时,会因氰化物溶解金、银而损失掉。当矿石中含有可溶于氰化物的次生铜矿物时。

The cyanogenless flotation method, because the prescripton used is not toxin and can improve the efficiency of flotation process without environmental pollution, is a good and wide—used method in separation operation in recent years. The author uses the method to separate sulfide ores in Wuzai deposit based on their complex composition, structure and texture as well as many recoverable elements. The author selects zinc sulfate andsodium sulphite as main inhibited prescription in cyanogenless technology to successfully separate lead, zinc and sulfur and recover gold and silver in ores. According to the floating difference of sulfide ores and the characteristics of prescription, galena has been preferably separated by flotation process under the condition of fine ground. At the same time, pyrite is inhibited by lime and zinc blende are inhibited by zinc sulfate and sodium sulphite respectively. The test result shows that eleven elements have been recovered and among them recovered silver corresponds to the quantity of a middle—large scale deposits, and that the technology of fine ground—preferential flotation and selected prescription is favourable for the separation and utilization of sulfide ores and the technical and economic benefits in the deposit.