Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

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27178
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Started by JohnnyD
Muriatic Acid + Clorox Bleach is dissolving my gold, but Sodium Metabisulfate (stump out) is not dropping the gold back out in pure form it's only changing colors of my solution. no precipitation.
r
Last replied to by randy N
so when cleaning the gold dirt with clean muriatic acid which is the gold and which is the other metals,,. i added fresh muriatic started turning dark with a light colored sedement in bottom this is m...
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3568
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Started by
Disposal of Spent Activated Carbon: How can I safely dispose spent carbon which has long been used in the elution process and how can I verify if the carbon contains any residual gold?
Last replied to by James Nkali
hi,need help please, i have more than 30 tonnes of eluted activated carbon with 50ppm of Gold and 90 ppm of copper,    i dont want to use Elution machine because its more expensive, am looking forw...
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Started by Bob Mathias
Please advice how can I increase the gold purity during smelting from sulphide ore, fluxes used are Borax (dehydrated), Silica, Soda ash and Potassium Nitrate. It is for smelting of EW sludge and I want to reduce the amount of silver and base metal t...
k
Last commented on by vijay
nice advice
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1415
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Started by Maya Rothman
I need to know the correct dosage addition of zinc (Kg Zn / ppm Ag) to have a better precipitation of silver?
Last replied to by Helena Russell
Please, do not forget mercury , because is another element that precipitates with zinc addition.Another issue , higher grade Au and Ag lower ratio Zn / (Au + Ag). Keep in mind Pourbaix's diagram and t...
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1519
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Started by
I need your help finding another Gold Smelting Method is known to melt gold concentrate, I use caustic soda and borax.
Last replied to by
It`s really helpful, got it and for me now is like a boy with a new toy, appreciate it!
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Started by JohnnyD
I am interested in finding some anecdotal evidence of electrowinning cell fires and what caused it.Has anybody come across some and where did it occur?
Last commented on by Victor Bergman
Not directly, no.
8
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5136
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Started by Helena Russell
I am currently separating and extracting gold from margin ore dump (Mod) using the following processes: leaching, carbon in pulp, elution (zadra process) and electro winning. My final product (sludge gold) is contaminated with excessive copper. What...
Last replied to by Maya Rothman
and:
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1024
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Started by Bob Mathias
A copper ore containing sulfite and oxide copper.Does anyone know what is the most efficient way to refine this copper concentrate?
Last replied to by JohnnyD
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...
8
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983
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Started by
With regards to the disposal of billet brushes' aluminum dust, what is the best way to dispose the aluminum dust produced from billet brushes in extrusion lines? Is remelting in melting furnaces safe?I am aware that the dust is highly explosive a...
Last replied to by JohnnyD
David, you pose an interesting point. The quantity of dust generated by rolling mill or extrusion brushes are quite low on a weight/time scale basis. Well below the expected Minimum Explosive Concentr...

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