有色金属(冶炼部分)

在铜阳极泥一次预处理脱铜、砷的试验基础上,研究了二次预处理脱锑、铋,同时避免碲分散的工艺。结果表明,在温度75℃、初酸浓度290g/L(以硫酸计)、初始Cl-浓度150g/L、反应时间3h、液固比4∶1、用SO2控制反应电位的条件下,锑浸出率为96.93%,铋浸出率为95.79%,碲可全部留在预处理渣中。

Based on pretreatment experiment to remove copper and arsenic from anode mud,secondary pretreatment to remove antimony and bismuth was studied without dispersion of tellurium.The results show that leaching rate of antimony and bismuth is 96.93%and 95.79%respectively with tellurium left in pretreatment slag under the optimum conditions including temperature of 75 ℃,concentration of primary acid of 290 g/L(in sulfuric acid),initial Cl-concentration of 150 g/L,reaction time of 3 h,L/S=4∶1,and reaction potential is controlled by SO2.