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华铜矿入选含铜矿石以磁铁矿含铜型、矽卡岩含铜型为主。原矿含铜0.4％,含金为0.5～0.6克/吨。金在浮选过程中,富集在铜精矿中的回收率为52％左右。从多次流程考察中发现:金在粗选作业的回收率为75～80％,而在铜精选循环中(三次精选),有较多的金连生体、部分单体金被淘汰,随中矿返回到铜粗选作业中,造成了金在中矿中的恶性循环,最终从尾矿中流失,中矿金品位为2～3克/吨。华铜矿在1982年成功地用软复面固定溜槽回收尾矿中的低品位金。在小型和工业试验基础上,于1983年初,采用了浮一重联合流程,即在铜中矿返回粗选作业的回路中,用软复面固定溜槽选收铜中矿中的金。
Copper ore selected copper ore to magnetite copper type, skarn copper-based. 0.4% ore containing copper, gold 0.5 to 0.6 grams / ton. Gold in the flotation process, the enrichment of copper concentrate in the recovery rate of about 52%. It has been found from many process investigations that the recovery rate of gold in roughing operations is 75-80%, while in the copper selective cycle (third selection), there are more gold with biological bodies and some monomer gold is eliminated, With the return of ore to copper roughing operations, resulting in a vicious cycle of gold in the mine, and eventually lost from the tailings, the mine gold grade of 2 to 3 grams / ton. In 1982, China Copper successfully reclaimed the low-grade gold from the tailings with soft, fixed-face fixed chutes. On the basis of small-scale and industrial tests, in early 1983, a floating-heavy combined process was adopted, that is, the gold in the copper mine was selected and recovered with a soft double-faced fixed chute in the circuit where the copper mine returned to roughing operation.