Laboratory Testing & General Mineral Processing Engineering

Laboratory Testing & General Mineral Processing Engineering

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Fire Assay method for determination of Gold in metal Copper (1 reply and 1 comment)

P
Hydromet-Paris
7 years ago
Hydromet-Paris 7 years ago

What flux to use to fireassay metal copper for gold analysis?? 

C
Colette
7 years ago
Colette 7 years ago
Like

I suspect that the scorification method, which is the procedure used for blister copper, might be the approach you are looking for, warning though - losses to cupels and slags can be high, as you are no doubt aware fire assay of high base metal material is often fraught. 

ttps://www.911metallurgist.com/assay-laboratory-instructions/ and https://link.springer.com/content/pdf/10.1007/BF03215123.pdf,

I am most familiar with the two step wet-dry Van Liew's Method for Blister Copper, if you google "A MANUAL OF FIRE ASSAYING" there is a very old book which you can download for free from https://ia601400.us.archive.org/29/items/manualoffireassa00fultuoft/manualoffireassa00fultuoft.pdf that contains the traditional methods for blister copper. Might be a good starting point.

 

A two step acid digest followed by ICP or AAS on solution, something similar to this process https://link.springer.com/content/pdf/10.1007/BF03215123.pdf, is more rapid and may give better accuracy.

There is an excellent summary of flux selection for fire assay here https://www.911metallurgist.com/blog/fire-assay-flux-litharge-composition , I don't think it will help in this specific case, but provides some abckground.

 

D
Dario L
7 years ago

You can look this link http://www.sciencedirect.com/science/article/pii/003991408780231X?via%3Dihub maybe it could help too

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