金精矿氰化尾渣铅和铜的回收

Recovery of lead and copper from cyanide tailings

采用优先浮选铅、再活化浮选铜的工艺流程对某金精矿氰化尾渣铅、铜回收进行研究.闭路实验表明:石灰作抑制剂,乙硫氮(二乙基二硫代氨基甲酸钠)和丁基黄药(丁基黄原酸钠)作捕收剂,通过"一粗两扫两精"流程,得到回收率为90.48%、品位为45.24%的合格铅精矿;以NP(铜、锌无机盐组合药剂)作铜活化剂,有机抑制剂FM抑制黄铁矿,Z-200(O-异丙基-N-乙基硫逐氨基甲酸酯)和丁铵黑药(二丁基二硫代磷酸铵)作捕收剂,采用"一粗两扫两精"流程,得到回收率为82.17%、品位为19.28%的合格铜精矿;金、银同时富集于铅精矿和铜精矿.

The flowsheet of the selective flotation of lead and the activation flotation of copper was adopted to recover lead and copper from cyanide tailings. Closed circuit test results show that the qualified lead concentrate with the recovery of 90.48 % and the grade of 45.24% can be produced with lime as a stabilizer, sodium diethyl dithiocarbamate （N, N-diethyldithiocarbamate） and butylxanthate （butyl sodium xanthate） as combined collectors, and by using the flotation flowsheet of one roughing, two scavengings and two cleanings. The qualified copper concentrate with the recovery of 82.17 % and the grade of 19.28 % can be produced with NP （a combined reagent by inorganic copper salts and inorganic zinc salts） as an activator, organic depressant FM as a stabilizer, Z-200 （O-isopropyl-N-ethyhhioearbamate） and butyl ammonium aerofloat （ammonium dibutyl dithiophosphate） as combined collectors, and by using the flotation flowsheet of one roughing, two scavengings and two cleanings. Gold and silver are also simultaneously enriched within the two kinds of concentrates.