Hydrometallurgical processing of anode slime for recovery of valuable metals

摘要: The anode slime obtained from Indian Copper Complex, Ghatsila was used for the recovery studies with aim of developing a hydrometallurgical processing route. chemical analysis showed that it contained valuable metals like copper, nickel, selenium, tellurium, gold, silver and platinum group metals. Characterisation study by XRD analy¬sis revealed presence various phases NiO, CuSO4.5H20, NiSe, a-CuSe, Cu4SeTe. Cu2Te, (Cu02Ni08)O, Cu7Tey AgCu7 Te1,y Si02 etc. in slime. Presence free moisture, combined selenium tellu¬rium were detected TG/DTA studies. Preliminary leaching experiments sulphuric hydrochloric acid media at different conditions carried out to recover nickel tellurium. Maxi¬mum copper normal pressure found be about 55% 77% respectively. In both cases tellurium recoveries poor. autoclave improved increasing time pressure. Maximum tune 85% 71% respectively achieved using 1 % as leachant. On concentration 20% leaching, 95% 46%