Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning 2017-03-23T09:55:18+00:00
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Copper Refinery (4 replies)

Bob Mathias
1 year ago
Bob Mathias 1 year ago

A copper ore containing sulfite and oxide copper.
Does anyone know what is the most efficient way to refine this copper concentrate?

1 year ago
JohnnyD 1 year ago

Why don't you consider a direct leach? Curtin University has developed a process to leach copper in alkaline medium with glycine as lixiviant. Glycine is a cheap, non-toxic, edible, non-volatile, non-flammable reagent that is highly soluble in water. It dissolves copper from oxides, carbonates, oxysulfates, chlorides, native copper and sulfides. It also dissolves gold and silver at the same pH but requires elevated temperature (60-70 deg C). Extraction with conventional SX-EW is easy. As it runs alkaline it does not react with acid-consuming gangue. Pyrite remains mostly unreacted and very little iron dissolve. Curtin University (Australia) has pending patents on the technology and the technology is being commercialized by Mining & Process Solutions Pry Ltd. Contact me for more information.

David Kano
1 year ago
David Kano 1 year ago

If you also want to test other processes, for example CESL Copper Process (autoclave leach-SX-EW, E-mail: and Outotec Hydrocopper Process (E-mail: are also available.

Bill Fraser
1 year ago
Bill Fraser 1 year ago

JohnnyD's leaching process is good. I think that will be an efficient and cheap process.

Hallochem Group also are cooperating with Johnny and his research team.

We can provide Mextral series copper solvent extraction reagents and technology support for the whole L-SX-EW process.

Hallochem is the largest manufacturer of extractants in China. 

1 year ago
JohnnyD 1 year ago

Yes we used a number of SX reagents and the Mextral products from Halochem performed very well. Bob has been really helpful to provide the reagents in a short time. We'll publish more detailed results in forthcoming papers

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