低浓度铜阳极泥加压浸出液中银硒碲的分离

Separation of Silver,Selenium and Tellurium from Copper Anode Slime Pressure Leaching Solution with Low Concentration

采用铜粉置换的方法从低浓度铜阳极泥加压浸出液中综合回收银、硒、碲、铜等有价金属.结果表明,控制置换反应温度分别为≤45℃、≤75℃、≥95℃时,可以分别得到以银为主的银渣、以硒为主的硒渣和含银硒很低的碲渣.当浸出液中碲浓度很低时,先采用铜粉分步置换银、硒,再结晶脱铜,脱铜母液用铜粉置换,碲置换率可达99％以上,碲置换渣含碲高达36％～43％.

Silver,selenium,tellurium and copper were comprehensively recovered from copper anode slime pressure leaching solution with low concentrations by copper powder replacement.The results show that silver slag bearing mainly silver,selenium slag bearing mainly selenium,and tellurium slag bearing very low silver and selenium are obtained by controlling replacement reaction temperature of ≤45 ℃,≤75 ℃,and ≥95 ℃,respectively.When tellurium concentration in lixivium is very low,tellurium replacement rate is 99％ above with tellurium content in tellurium slag of 36％～43％ by the processes of silver and selenium replacement with copper powder,copper removal by recrystallization,and tellurium replacement with copper powder from copper removal mother liquor.