从二次金粉中提取金、碲、铂、钯、硒工艺研究

Research on Extraction of Gold, Tellurium, Platinum, Palladium and Selenium From Platinum and Palladium Concentrate

针对在处理铜阳极泥过程中产生的二次金粉,采用盐酸对二次金粉进行预处理,亚硫酸钠沉碲;使用氯酸钠溶解酸浸渣,草酸还原金工艺,氯化铵沉铂钯,二氧化硫还原硒工艺,碲回收率达到95%以上,铂、钯回收率均在98%以上,硒回收率在97%以上,该工艺可选择性分离金、碲、铂、钯、硒,具有操作简单、贵金属回收率高等优点。

In connection with the platinum and palladium concentrates produced in the course of processing the copper anode slime, utilizing the process of platinum and palladium concentrate pretreated by hydrochloric acid, tellurium subsided by sodium sulfite, acid-leaching slag dissolved by sodium chlorite, gold restored by oxalate, platinum and palladium subsided by ammonium chloride and selenium restored by SO_2. The recovery rate of platinum and palladium is over 98%, the recovery of tellurium is over 95%, and the recovery of selenium is over 97%. The process has the advantage of selective separation from gold, tellurium, platinum,palladium and selenium, simple operation and high precious metals recovery.