降低铜阳极泥分铜工序的有价金属损失探讨

在保证铜的回收率前提下，为了降低铜阳极泥硫酸化焙烧后脱硒渣分铜工序中有价金属银、碲的浸出损失，进一步富集贵金属，选择水浸分铜来取代酸浸分铜.主要考察了氯化钠添加量、反应温度、反应时间以及液固比对铜、银、碲浸出率的影响.结果表明，脱硒渣水浸分铜工序的优化条件组合为:添加脱硒渣量9 %的氯化钠，反应温度30 ℃，控制液固比4:1（单位为mg /L），搅拌反应2 h.将上述优化条件组合应用于车间扩大试验中，无需升温加热，铜回收率为94.17 %，而银、碲浸出损失分别降低至0.08 %、2.39 %；金、银质量百分比由原来的0.24 %和10.64 %分别增至0.62 %和17.85 %. 

Reduction of valuable metal loss in copper anode slime process

To reduce the leaching loss of valuable metal and Tellurium in the process of separating copper from copper anode slime after sulphate calcinations, water leaching copper is utilized to replace acid leaching copper. The effects of sodium chloride dosage, reaction temperature, reaction time and liquid-solid ratio on the leaching rate of copper, silver and tellurium were mainly investigated. The results show that the optimum conditions for the process of water leaching and separating copper from the deimpregnated slag are as follows: the adding of deselenide residue sodium chloride 9 %, reaction temperature 30 C, the liquid-solid ratio 4:1, stirring reaction 2 h. The recovery rate of copper is 94.17 %, while the leaching loss of silver and tellurium is reduced to 0.08 % and 2.39 %, respectively when the above optimal conditions are applied to the workshop expansion test. The percentage of gold and silver quality increased from 0.24 % and 10.64% to 0.62 % and 17.85 % respectively.