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flotation copper oxide (2 replies and 1 comment)

1 month ago
Mahdi 1 month ago

Is there a way for flotation of copper oxide? Is it possible to recovery up to 75 percent achieved? I have sample that about 45% of copper oxide and about 40% recovery was achieved with the SIPX and Sodium Mercaptobenzothiazole Dithiophoishate collector. I need to know how to increase copper recovery.

Greg Henderson
1 month ago
Greg Henderson 1 month ago
1 like by David


Radio Hill in Australia successfully used the Ausmelt reagent AM28 (an alkyl hydroxamate) to float mixed sulphide/oxide copper ore, increasing recovery from a low of 40 to 50% up to 70%.  They used AM28 to replace sulphidisation of oxide minerals, in conjunction with standard sulphide collectors to recover sulphide minerals.  Oxide minerals floated were cuprite, malachite and azurite.  AM28 is a much safer reagent than mercaptaobenzothiazole as well (and smells a whole lot better!).  Cytec (now Solvay) also make hydroxamates, as does Clariant. 

I suggest that you engage a flotation reagent supplier to conduct screening tests on a sample of your ore rather than going to a commercial lab initially.  You should also do some XRD and QEMSCAN to understand what the minerals are in relative abundance and mineral associations with gangue, including degree of locking to understand what is happening in your plant.

Hope this helps.

Paul Morrow
1 month ago
Paul Morrow 1 month ago

Thank Greg, 

yes Mahdi. You best use a hydroxamate. I got great results using Oxflo https://www.911metallurgist.com/blog/copper-oxide-flotation Your ore better be of good grade because hydroxamates and sulphidisationreagents are expensive. Chrysocolla, malachite and azurite was what I had.

2 weeks ago

Hi Mahdi,
Which float equipment were you using to conduct this test?

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