Hydrometallurgical processing of anode slime for recovery of valuable metals

Hait, Jhumki and Jana, R K and Kumar, Vinay and Dasgupta, P and Bandyopadhyay, M and Sanyal, S K (1998) Hydrometallurgical processing of anode slime for recovery of valuable metals. In: UNSPECIFIED.

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

Item Type:Conference or Workshop Item (UNSPECIFIED)
Uncontrolled Keywords:Anode slime; Characterization of anode slime; Leaching; Recovery of vauable metals
Divisions:Metal Extraction and Forming
ID Code:1550
Deposited On:13 Sep 2010 14:04
Last Modified:13 Jan 2012 12:08
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