Recovery of copper, nickel and cobalt from manganese nodules by Arc furnace smelting

Randhawa, N S and Agarwal, Sanjay and Sahu, K K and Jana, R K (2009) Recovery of copper, nickel and cobalt from manganese nodules by Arc furnace smelting. In: International conference of Non-ferrous metals 2009, July 10-11, 2009, Bhubaneswar.



Polymetallic sea nodule contains multiple metals like copper (1.1 %), nickel (1.2%), cobalt (0.08%), manganese (24%), iron (5.4%), silica, aluminum, etc. Of these, cobalt, copper and nickel are of much importance and in great demand world over. India has made remarkable progress in recovering these valuable metals from sea nodules following the hydrometallurgical routes. The present paper describes the attempt for recovering these metals from sea nodules by pyrometallurgical route. A number of experiments were carried out in 50 KVA electric arc furnace for reduction smelting of sea nodule. The smelting produced an alloy rich in Cu, Ni & Co. A typical composition of alloy is: Cu: 12.33%, Ni: 14.05 %, Co: 0.75 %, Mn: 8.23%, Fe: 55.96% and a slag consisting of MnO: 42.61%, Si02: 33.51%, FeO: 5.66%, (CaO+MgO): 5.42%, A1203: 6.1 %. The recovery of metals in alloy were Cu: 90-95%, Ni: 95-97% and Co:80-85% with 6 % coke addition at temperature of 1400-1550°C. The alloy obtained may be suitably treated further to recover these metal in pure form by pyro or/and hydrometallurgical routes. The slag contained high Mn/Fe ratio, which was suitable for ferromanganese or ferrosilicomanganese production by smelting in an electric arc furnace.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Copper; nickel; cobalt; manganese nodules;Arc furnace smelting
Divisions:Metal Extraction and Forming
ID Code:1255
Deposited By:Dr. A K Sahu
Deposited On:21 Jul 2010 11:59
Last Modified:12 Feb 2013 14:02
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