Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extraction

Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extraction

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Separation of cobalt and copper from iron rich sulphate solution (2 replies and 4 comments)

b
kbob
6 years ago
kbob 6 years ago

I have a leach solution generated from a sulphide ore that is rich in iron with some copper (about 2%) and cobalt (bout 0.2%).  What is the best way to isolate and form a cobalt product from this solution.

Y
Yves
6 years ago
Yves 6 years ago
Like

Hi, When you place a question, don't assume the reader knows what sort of leaching process you have been doing. The chemistry of the leach and metal separation is an exact science and cant be resolved with vague information.

b
kbob
6 years ago

Hi, The leaching was done using only water and nothing else added as the pyrrhotite is unstable and generates sulphuric acid very quickly. Over time most of the sulphides dissolve taking the chalcopyrite and pyrrhotite into solution.

thanks

R
Roger W
6 years ago
Roger W 6 years ago
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Precipitate ferric (no need to oxidise ferrous to ferric) at pH ~5.0 (Will result in significant co-precipitation of Cu and Co). Use <100 micron lime.

Subject resulting slurry (must be < 20% solids) to Continuous Resin in Slower Settling Solids Process.

(See ALTA 2017 Paper by Fred Landsberg)

Will extract co-precipitated Cu and Co as the slurry acidifies and redissolves Cu and Co.

Easy to selectively and very cleanly elute cobalt ~50g/l then copper  >50g/l.

Leaves water and ferric precipitate - water can be recovered.

Cheers & Merry Christmas

Roger W

 

 

b
kbob
6 years ago

Thanks. I will try this. Some tests have been done to precitpate the iron and it persists over ph 7. Most of the cobalt precipitates over ph 8

Merry Christmas

K
kevinextraction
6 years ago

Yes. Agree with Roger's idea.
That can be a good try.
Did you have nay news? Kbob

b
kbob
6 years ago

I have now done this and now ahvea dark brown sludge at about ph5. had some issues with the pH adjustment as the reaction seems slow. I now have to get hold of some IX resin beads to test adsorption. Any suggestions on the best resins to use? It looks promising.

thanks Bob


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