还原熔炼回收铜阳极泥熔炼渣中有价金属

Recovery of Valuable Metals from Copper Anode Slime Smelting Slag by Reduction Smelting

以铜阳极泥熔炼渣为原料,采用还原熔炼工艺回收渣中有价金属。探究渣型、Na_(2)CO_(3)用量、焦粉用量和保温时间对金属回收率的影响。结果表明,在冶炼温度1150℃,渣相m(Fe)/m(SiO_(2))=0.72,m(CaO)/m(SiO_(2))=0.65,Na_(2)CO_(3)用量5%,焦粉用量2%,保温时间60 min的最优条件下,渣中Au、Ag、Pb、Bi的回收率分为97.15%、97.78%、91.27%和99.61%。实现了铜阳极泥熔炼渣中有价金属的综合回收。

Valuable metals in copper anode slime smelting slag were recovered by reduction smelting.Effects of slag type,Na_(2)CO_(3) dosage,coke powder dosage and holding time on metal recovery were investigated.The results show that recovery rates of Au,Ag,Pb and Bi in slag are 97.15%,97.78%,91.27% and 99.61%,respectively under the optimum conditions including smelting temperature of 1150℃,mass ratio of m(Fe)/m(SiO_(2))=0.72,mass ratio of m(CaO)/m(SiO_(2))=0.65,Na_(2)CO_(3) dosage of 5%,coke powder dosage of 2%,and holding time of 60 min.Comprehensive recovery of valuable metals in copper anode slime smelting slag is realized.