PROCESS FOR NICKEL AND COBALT EXTRACTION FROM LATERITE ORES

World Intellectual Property Organization Patent

APP PUB NO WO-2004067787-A1
SERIAL NO

PCTAU2004000113

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Abstract

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A method for the recovery of nickel and cobalt from nickel and cobalt containing laterite ores, said method comprising: a) roasting feed ore in a reducing atmosphere in a rotary kiln to selectively reduce the nickel and cobalt, wherein either no, or less than 2.5% w/w reductant is added to the feed ore prior to roasting; b) leaching the reduced ore with an aerated ammoniacal ammonium carbonate solution to extract the nickel and cobalt into a leach solution; and c) separating the leach solution from the ore tailings and recovering the nickel and cobalt by a process selected from ammoniacal solvent extraction, precipitation techniques or ion exchange.

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Patent Owner(s)

Patent OwnerAddress
BHP BILLITON SSM TECH PTY LTDAU

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Inventor(s)

Inventor Name Address
FRANCIS BOYD RAMON ALICE RIVER QUEENSLAND 4817
REID JOHN GRAHAM INDOOROOPILLY QUEENSLAND 4068
BARNETT STEPHEN CHARLES CROMPT HENDRA QUEENSLAND 4011

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