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215
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Started by Reidy
Hi, has anybody melted gold concentrate and poured it without using any flux's? Our goal isn't to refine the gold as the mint does that anyway and the cost will be the same. We have low iron and lead levels and I was just curious of anybody having ...
Last commented on by Reidy
We completed the trial with 60kg of concentrate but it failed as the molten metal was too viscous to pour. We added some...
5
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266
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Started by Colin
Can someone explain the process of extracting gold once you have obtained a concentrate after putting your alluvial material through a gravity machine. We put about 200kg of soil through a gravity machine and ended up with about 2kg of concentrate. W...
Last replied to by Jorge Ganoza
You do not mention the gold recovery. It is important to calculate it to evaluate the metallurgical performance of the ...
2
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140
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Started by ameer
Hi, I faced problem in  our pressurise  zadra cell. High voltage appeared 12 volt during gold stripping, ampere was set to 660A, flow rate is 11.5  Temperature is 150 C, anyone can help me to solve this problem
Last replied to by Wayne
Hi,  i would check all your connections in the system, at first glance it sounds like an electrical problem like a part...
2
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169
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Started by girishchandra
Need help for recovery of copper from copper nitrate solution   
Last replied to by girishchandra
I have solution of CuNO3 + HNO3 upto 400 liter.Concentration of CuNO3 in solution is arround 200 gms/liter.pH of solutio...
1
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43
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Started by sarchery
Is there a specific flux recipe or extra additive that has been tested to improve the fineness of the gold bars that contain high copper content during smelting. The current flux constituents are borax, silica and potassium nitrate
Last replied to by David
Try adding 5% feldspar.
6
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260
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Started by Charlie
I am having a problem of gold not coming off from the steel knitted mesh in the cathodes in the electro-winning cell. I tried putting the steel knitted mesh in nitric acid before washing it off with a high pressure wap machine but still doesn't co...
Last commented on by Subhash-Kumar-Roy
very inexpensive steel wool=mild steel
11
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317
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Started by goldinvestor
Hi, I have been invited to invest in a new gold mine (in Scotland) which has just announced preliminary results from a tailings bulk processing trial and I'm trying to get a rough idea of revenues. The Au grade of the tailings is 8g/t (the mine when ...
Last replied to by max skinner
My suggestion, you need a 34 or 64 element ICP to see what is in the concentrates so you know where you stand. The lead ...
2
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283
VIEWS
Started by Madungo
Hello, I need help to releasing gold lock up from my CIL circuit's carbon. I want to run more frequent elution in order to get more gold out but we seem to only recover what we're putting in only. My gold locks up in the tanks and it increases each...
Last replied to by Cyanide
Madungo, Good practice to do monthly gold inventory so you can track circuit inventory and establish good optimum. Most...
4
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300
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Started by Panashe
My Company is involved in toll elution using the pressurized Zadra (350-400kg carbon load), we are now considering using an AARL elution for toll carbon desorption as an upgrade from the pressurized Zadra and the Peter Goossen plants are there any po...
Last replied to by ThabisoKwenane
For water treatment, you can use cat-ionic resins in columns to soften your water. Use brine (NaCL solution) for flushin...
1
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167
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Started by Omurvama
Hi all! I want to smelt an ore with 4 kg/Ton of silver. I have been reading about the process and there are several kind of fluxes can be used. What could you tell me about it? is enough the silver in ore to think in smelting? is the flux selection ...
Last replied to by grant.k.harding
Dear Omar,  The ore has silver worth about $2,500 per ton, so its not worth direct smelting at that concentration, unl...
2
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261
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Started by girishchandra
I want to know about electrorefining of gold to get  higher purity of gold metal. Input of gold would be up to 98% or above . Please help me.
Last replied to by girishchandra
  I am trying to achieve purity of gold about 99.99% Using chlorauric acid for electrorefining.
1
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186
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Started by CA
We are using the alcohol Zadra method to treat our carbon.  However, due to the origin of the ore we are treating, we wind up with leaves, roots, etc. that catch on the carbon screen i.e. Trash in elution column.  Separating these plant products f...
Last replied to by Bill Fraser
I think you should screen it out from the grinding circuit cyclone overflow. It really is not that hard/complicated. It ...
3
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220
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Started by kahonde
hello, how does carbon get contaminated with manganese and iron during electrowinning using a single boiler?  
Last replied to by David
It is in your question. You don't know what it is?
5
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222
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Started by kannan
I wonder how to increase the panning of gold containing borax slag? Is the particle size affect the panning yield?  
Last replied to by kannan
Which flux is more oxidizing potassium nitrate or sodium peroxide? for smelting with borax.
1
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227
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Started by kannan
We are currently trying to remove only iron,zinc and indium in the alloy gold in the melting stage itself , other than copper and silver with gold. The reason for this trials is direct usage of the resulted alloy gold to the further process by adding...
Last replied to by Marshal Meru
The metals slag out in the following order, as oxides: zinc, iron, antimony, arsenic, lead, bismuth, nickel, tellurium, ...

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