高镍铜阳极泥预处理富集金银的研究

由于高镍铜阳极泥是典型的难处理铜阳极泥，故以高镍铜阳极泥为原料，考察了温度、时间、液固比等因素对贱金属硒、铜和镍脱除效果的影响.研究结果表明，经过两次焙烧和浸出，可脱除995%的硒、997%的铜、9335%的镍和浸出9876%的银，且金从193g·t-1富集到1820g·t-1，增加了8~9倍.第一段焙烧和浸出条件:温度650℃、焙烧时间1h、酸泥质量比12、浸出温度55℃、浸出时间1h、液固质量比6.第二段焙烧和浸出条件:焙烧温度500℃、焙烧时间3h、酸泥质量比12、浸出温度55℃、液固质量比6、浸出时间1h.经过预处理之后，阳极泥的量减少为原来的1126%，大大提高了后续回收工序中的设备处理能力.

Pretreatment of Copper Anode Slime with High Nickel Content for Concentrating Gold and Silver

Taking the typical refractory high nickel copper anode slime as the raw material, the effects of temperature, time and liquid-solid ratio etc. factors on the removal of the metals selenium, copper and nickel were studied. The results showed that, after roasting-leaching twice, 99.5% of selenium, 99.7% of copper, 93.35% of nickel were removed. 98.76% silver was in the leaching solution, and the amount of gold reached 1820 g·t^-1 from 193 g·t^-1. The best conditions of the first roasting-leaching process were as follows, the roasting temperature of 650°C, the roasting time of 1 h, m(H2SO4)/m(anode slime) of 1.2, the leaching temperature of 55°C, the leaching time of 1 h, and the liquid-solid ratio of 6.The best conditions of the second roasting-leaching process were as follows, the roasting temperature of 500°C, m(H2SO4)/m(anode slime) of 1.2, the roasting time of 3 h, the leaching temperature of 55°C, the leaching time of 1 h and the liquid-solid ratio of 6. The weight of the anode slime decreased to 11.26% that of the original after the pretreatment, which greatly enhanced the handling capacity of the equipment during the subsequent recovery process.