关键词: 贵金属提取工艺, 蒸残渣, 氯化, 萃取, 提纯

Abstract:

The company produced platinum and palladium low grade gold material that was a kind of steamed residue，additionally，the steamed residue was produced during the process of precious metals concentrate distillation separation of osmium，ruthenium and aqueous chlorination.The existing steamed residue treatment technique of chloride repeatedly，because the effect of the efficiency of chloride，there were still some precious metal residues in the outside pay residue，has the problem of precious metals lossing.In order to improve the precious metal recovery，the smelting plant in the company completed a series of experimental studies on purification of precious metals from the steamed residue.Thus，after the experimental exploration for a long time，the steamed residue chloridizing roasting-hydrochloric acid leaching gold platinum palladium-organic solvent extraction separation process was determined.Then，the industrialized expanding test and the optimum technology conditions were also determined，meanwhile，the direct recovery rate was more than or equal to 95% during the technological process of gold，platinum and palladium.Compared with aqueous chlorination process，the method applied in the paper had advantages of high recovery efficiency for precious metals，low labor intensity，short production cycle and low production cost.

Key words: precious metals extraction process, steamed residue, chlorination, extraction, purification