Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
United States Patent : US4571262 : Recovery of Platinum Group Metals from Nickel-copper-iron Matte
Author: Metals Abstracts
Author: United States Patent : US36522665 : Recovery of Metal Values from Nickel-copper Mattes
Author: Literature and Patent References to Platinum Group Metals
Author: International Nickel CompanyPublisher:
ISBN:
Category : Platinum group
Languages : en
Pages : 170
Book Description
The Initial Development of Processes for the Direct Leaching of Iron-nickel-copper Mattes Containing Platinum-group Metals and for the Production of Ferronickel
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 26
Book Description
Two different processes for the direct leaching of iron-nickel-copper mattes containing platinum-group metals (PGM) are proposed. The processes, which avoid the classical converting step, reduce atmospheric pollution by sulphur dioxide, and recover sulphur, ferronickel, and a PGM concentrate. The testing of the different stages, some to the pilot plant stage, is described. The first process includes a controlled ferric sulphate leach of the matte, followed by the electrowinning of a ferronickel alloy, whereas the second process consists of a hydrochloric acid leach of the matte, followed by a pyrohydrolysis step to regenerate the acid and produce iron and nickel oxides. The further treatment of the copper sulphide and PGM residue, which involves a ferric leach and the plating of copper in ferrous chloride medium, has also been tested. There seem to be no major technical problems in the treatment of matte, but the economics depend on the cost of overcoming the air-pollution problem and on the price of the ferronickel alloy or ferronickel oxide produced.
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