关键词: 硫化铜银精矿, 氯化焙烧, 稀硫酸+氨水浸出

Abstract: There are 5.63% copper，2 419 g/t silver and 4.28% sulfur in a Cu-Ag concentrate with particle size of 79.50% -0.077 mm.In order to improve the additional value，reduce transport cost，gain the profits for enterprise，the pyrometallurgical and hydrometallurgical smelting research is conducted on the concentrate.The results show that with industrial salt to sample mass ratio of 1∶20 and chlorination roasting at 850 ℃ for 1.5 h，roasted products were pretreated by 2% dilute sulfuric，and then leached for 60 min by adding 25% ammonia water，with volume equal to 10% sulfuric acid volume.Copper and silver leaching rate of 96.60% and 96.40% was achieved respectively.The smelting method is high efficient in recovering copper and silver from Cu-Ag sulfide concentrate，with characteristics of simple process，high recovery and easy to operation.

Key words: Cu-Ag sulfide concentrate, Chlorination roasting, Leaching with sulfuric acid and ammonia