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2
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9841
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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 ...
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 ...
6
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6227
VIEWS
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...
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 solarsmith
if you want to get every thing out of it look up tcb in AZ for a concentrate refiner. and then make lots more. I am thinking of starting a gold ore concentrate coop here in Colorado to help all...
if you want to get every thing out of it look up tcb in AZ for a concentrate refiner. and then make lots more. I am thinking of starting a gold ore concentrate coop here in Colorado to help all...
3
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4763
VIEWS
Started by Roselyn Yeboah
Please can someone help me with ways to ash gold activated carbon followed by smelting! . I tried ashing 300g using a pot on a gas cooker but we couldn't get the carbon to burn so we tried smelting the granule with borax and salt peter as flux. The s...
Please can someone help me with ways to ash gold activated carbon followed by smelting! . I tried ashing 300g using a pot on a gas cooker but we couldn't get the carbon to burn so we tried smelting the granule with borax and salt peter as flux. The s...
Last commented on by Roselyn Yeboah
Thanks
Thanks
2
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1494
VIEWS
Started by wassink
I'm looking for information (data or literature) on water evaporation rates in copper EW. There are lots of factors that will affect this - electrolyte composition and temperature, ventilation, foam mist suppression or not, etc. But, I presume there ...
I'm looking for information (data or literature) on water evaporation rates in copper EW. There are lots of factors that will affect this - electrolyte composition and temperature, ventilation, foam mist suppression or not, etc. But, I presume there ...
3
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1384
VIEWS
Started by biteyaboy
I am looking possibility of smelting concentrate to copper bar with 102 ppm of Au and 23% of Cu. Is that possible to do this job by furnance with 3000 degree? I want copper and gold to be on the same bar. How can i do this?
I am looking possibility of smelting concentrate to copper bar with 102 ppm of Au and 23% of Cu. Is that possible to do this job by furnance with 3000 degree? I want copper and gold to be on the same bar. How can i do this?
7
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2539
VIEWS
Started by jovanifirebird
hi guys. my question is a small scale process. we desorb gold-cyanide (AuCN)) from a carbon. i am currently trying to decompose gold from cyanide in a 1M of NaOH solution. i use stainless steel as a cathode. battery as a power supply. however the pro...
hi guys. my question is a small scale process. we desorb gold-cyanide (AuCN)) from a carbon. i am currently trying to decompose gold from cyanide in a 1M of NaOH solution. i use stainless steel as a cathode. battery as a power supply. however the pro...
2
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3945
VIEWS
Started by biteyaboy
Is there any difference if i use glass bottle and grind it as silica poweder and using silica powder already made in factory? Let me know your thought
Is there any difference if i use glass bottle and grind it as silica poweder and using silica powder already made in factory? Let me know your thought
2
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1407
VIEWS
Started by RenniePet
And now for something completely different ...I'm an aspiring author and am writing a thriller based on "the Polish gold train". https://en.wikipedia.org/wiki/Nazi_gold_trainThe heroes (?) of my book have found the train and the gold. They wish to co...
And now for something completely different ...I'm an aspiring author and am writing a thriller based on "the Polish gold train". https://en.wikipedia.org/wiki/Nazi_gold_trainThe heroes (?) of my book have found the train and the gold. They wish to co...
Last replied to by RenniePet
For what it's worth, here is what it says in the current draft copy of my book:"Mariusz then purchased an induction melting furnace capable of melting a gold bar (12.5 kg), and 30 graphite molds into ...
For what it's worth, here is what it says in the current draft copy of my book:"Mariusz then purchased an induction melting furnace capable of melting a gold bar (12.5 kg), and 30 graphite molds into ...
2
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1564
VIEWS
Started by Ahmed Zaky
I have ( gold - lead - silver) and i ask if it is suitable to make parting for alloy to separate gold from lead and silver by nitric acid instead of cupellation by using bone ash Thank you
I have ( gold - lead - silver) and i ask if it is suitable to make parting for alloy to separate gold from lead and silver by nitric acid instead of cupellation by using bone ash Thank you
Last commented on by .999
Yes! Lead will dissolve fairly readily in hot weak nitric - 7 parts distilled water and 1 part concentrated nitric acid ( 67-69% ). You can't use strong nitric because lead nitrate crystals will form ...
Yes! Lead will dissolve fairly readily in hot weak nitric - 7 parts distilled water and 1 part concentrated nitric acid ( 67-69% ). You can't use strong nitric because lead nitrate crystals will form ...
4
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5369
VIEWS
Started by Ahmed Zaky
Hello i want to ask about the efficiency of gold recovery from ash of activated carbon by aqua regia (active carbon loaded with gold from cyanide leaching ) where this ash contains average gold 15 gram per kilo ash thank you
Hello i want to ask about the efficiency of gold recovery from ash of activated carbon by aqua regia (active carbon loaded with gold from cyanide leaching ) where this ash contains average gold 15 gram per kilo ash thank you
1
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1519
VIEWS
Started by Rudi
Good day fellow mets, Our group is in the process of building a pilot circuit to optimize methods of upgrading a tropical nickel laterite ore using mechanical means (combination of crushing/scrubbing/screening/classification/attritioning) similar to...
Good day fellow mets, Our group is in the process of building a pilot circuit to optimize methods of upgrading a tropical nickel laterite ore using mechanical means (combination of crushing/scrubbing/screening/classification/attritioning) similar to...
Last replied to by Sandeep Bisht
You mean like this? https://www.911metallurgist.com/blog/crushing-grinding-wet-ores
You mean like this? https://www.911metallurgist.com/blog/crushing-grinding-wet-ores
3
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1726
VIEWS
Started by max skinner
I am running some test using a lab size EMEW cell. I am told to use a certain current density, how do I calculate that? The cathode is 1.5 " diameter by 16" long stainless steel and the anode is 5/8 " diameter by 16 " long titanium.
I am running some test using a lab size EMEW cell. I am told to use a certain current density, how do I calculate that? The cathode is 1.5 " diameter by 16" long stainless steel and the anode is 5/8 " diameter by 16 " long titanium.
3
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1865
VIEWS
Started by FTM89
Hi, I`m working on a gold plant as a consultant. I find out that they are using caustic after the elution. For what purpose will they use caustic after the elution? What was explained to me was that it`s for conductivity. What will be a good number i...
Hi, I`m working on a gold plant as a consultant. I find out that they are using caustic after the elution. For what purpose will they use caustic after the elution? What was explained to me was that it`s for conductivity. What will be a good number i...
Last replied to by David
My friend says his references indicate that cells are operated with electrolyte conductivity in the order of 2 S/m. This is critical if gold is to be deposited efficiently
My friend says his references indicate that cells are operated with electrolyte conductivity in the order of 2 S/m. This is critical if gold is to be deposited efficiently
2
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2316
VIEWS
Started by geff
why to load carbon with gold and after strip off gold from carbon by electrolysis. is there any research to bypass the carbon loading and directly use the pregnant water as an electrolyte to recover gold ?
why to load carbon with gold and after strip off gold from carbon by electrolysis. is there any research to bypass the carbon loading and directly use the pregnant water as an electrolyte to recover gold ?
Last replied to by Mikhail
In order to send a solution with gold for electrolysis, the concentration of gold should be at least 20 mg / l. Otherwise, the electrolysis process is not justified.This method is implemented in insta...
In order to send a solution with gold for electrolysis, the concentration of gold should be at least 20 mg / l. Otherwise, the electrolysis process is not justified.This method is implemented in insta...
1
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2699
VIEWS
Started by biteyaboy
I have cathode mesh which i am going to wash by pressure water and filter solid residues for smelting, also to wash remaining in Wire mesh by nitric acid dry them ready for smelting. During smelting what required reagents are needed and in what quan...
I have cathode mesh which i am going to wash by pressure water and filter solid residues for smelting, also to wash remaining in Wire mesh by nitric acid dry them ready for smelting. During smelting what required reagents are needed and in what quan...
Last replied to by David
Hi Biteyaboy, Be sure to review https://www.911metallurgist.com/blog/gold-smelting-refining-process
Hi Biteyaboy, Be sure to review https://www.911metallurgist.com/blog/gold-smelting-refining-process
Gold Refinery Procedureshttps://www.911metallurgist.com/gold-silver-refine...
11
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1901
VIEWS
Started by Alex Loutou
Currently our Merril Crowe running with 2.5 ppm Au, 5 ppm Ag, zinc consumption 5kg/hrs (more than 20x stoichiometry) and 100 ppm PbNO3. So the base metal content in dore consist of 17% zn, 8% Pb and less Cu, Fe. Smelting ratio 1:1 cake: flux (15% sil...
Currently our Merril Crowe running with 2.5 ppm Au, 5 ppm Ag, zinc consumption 5kg/hrs (more than 20x stoichiometry) and 100 ppm PbNO3. So the base metal content in dore consist of 17% zn, 8% Pb and less Cu, Fe. Smelting ratio 1:1 cake: flux (15% sil...
Last replied to by David
I just uploaded this long and extensive history paper. I think it would help you. It reviews an example goldroom refining practices https://www.911metallurgist.com/gold-refinery/ https://www.911metal...
I just uploaded this long and extensive history paper. I think it would help you. It reviews an example goldroom refining practices https://www.911metallurgist.com/gold-refinery/ https://www.911metal...
2
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1628
VIEWS
Started by hulk
I need to use my eluate after elution more than once, currently I drain this solution because I think that it is dirty and I prepare another one for the next elution;what parameters of this eluate should i check before use it for a second or third e...
I need to use my eluate after elution more than once, currently I drain this solution because I think that it is dirty and I prepare another one for the next elution;what parameters of this eluate should i check before use it for a second or third e...
4
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1466
VIEWS
Started by hulk
During gold elution, a calcium deposit is formed on the plate exchanger surfaces, we perform shutdowns to clean them, can we clean effectively without Disassemble the plates, which cleaner should i use and at which concentration and which depth?
During gold elution, a calcium deposit is formed on the plate exchanger surfaces, we perform shutdowns to clean them, can we clean effectively without Disassemble the plates, which cleaner should i use and at which concentration and which depth?
2
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1999
VIEWS
Started by Japhet
Hi Team, I getting trouble to improve fineness on Dore' as most of the time i am getting more 50%+ Ag, Is there a specific flux recipe or extra additive that has been tested to improve the fineness of the gold bars?
Hi Team, I getting trouble to improve fineness on Dore' as most of the time i am getting more 50%+ Ag, Is there a specific flux recipe or extra additive that has been tested to improve the fineness of the gold bars?
Last commented on by .999
The process David is referring to is called " inquarting " or " quartering." It's when refiners lower the percentage of gold to 25% by the addition of silver or a base metal such as copper. 3 parts si...
The process David is referring to is called " inquarting " or " quartering." It's when refiners lower the percentage of gold to 25% by the addition of silver or a base metal such as copper. 3 parts si...
1
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1580
VIEWS
Started by hulk
Hello ! In our gold processing plant we pratice the elution of pregnant carbon by the zadra process, We use two columns: one for acid washing and the other for elution, but the filters in the elution column are clogged very often (probably due to ...
Hello ! In our gold processing plant we pratice the elution of pregnant carbon by the zadra process, We use two columns: one for acid washing and the other for elution, but the filters in the elution column are clogged very often (probably due to ...
Last replied to by David
Wash the carbon before elution tower or recirculate elution circuit solution clean screens then start strip.
Wash the carbon before elution tower or recirculate elution circuit solution clean screens then start strip.
1
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2171
VIEWS
Started by hulk
hi! how to estimate the required amperage for electrowinning cell for gold(zadra elution process).
hi! how to estimate the required amperage for electrowinning cell for gold(zadra elution process).
Last replied to by Mike Rockandel
Current efficiency is very low, maybe 10%. 700 A will plate about 1 kg/h gold.
Current efficiency is very low, maybe 10%. 700 A will plate about 1 kg/h gold.
2
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1508
VIEWS
Started by ely.thar
we conducted a bacisity test on the coal fly ash sample resulting to a ph of 12.01, how can we calculate the volume of our lixiviant needed to add in the sample to reach a ph of 0.8? thank you for your replies
we conducted a bacisity test on the coal fly ash sample resulting to a ph of 12.01, how can we calculate the volume of our lixiviant needed to add in the sample to reach a ph of 0.8? thank you for your replies
Last commented on by mikerockandel
Not sure 2stage helps you. But does depend on your objective. Imagine flyash moving left to right and acid solution opposite. 2stage would possibly give you a near neutral aqueous effluent with the f...
Not sure 2stage helps you. But does depend on your objective. Imagine flyash moving left to right and acid solution opposite. 2stage would possibly give you a near neutral aqueous effluent with the f...
3
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1625
VIEWS
Started by CA
We've been successfully running a small scale alcohol (isopropyl) zadra stripping process for a while now. We've begun a carbon stripping service for clients and today ran into something we have never seen. During the electrowinning process, a...
We've been successfully running a small scale alcohol (isopropyl) zadra stripping process for a while now. We've begun a carbon stripping service for clients and today ran into something we have never seen. During the electrowinning process, a...
7
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3678
VIEWS
Started by Mikhail
I need a method of burning carbon and smelting to extract the gold. Can anyone suggest a method? What are the potential losses of metal can be?
I need a method of burning carbon and smelting to extract the gold. Can anyone suggest a method? What are the potential losses of metal can be?
Last replied to by Mikhail
Hello dear colleagues, thank you for the comments to my question.I'm working on a project to extract gold from the dumps of amalgamation. The technology of heap leaching. Gold-bearing solutions are fe...
Hello dear colleagues, thank you for the comments to my question.I'm working on a project to extract gold from the dumps of amalgamation. The technology of heap leaching. Gold-bearing solutions are fe...
1
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2582
VIEWS
Started by Amir
I recycle metal (gold. Silver and palladium) from pcb by hydrometallurgy process. Before i dismantled component from pcb with air hummer. But now i decided chemically by organic solution like alkane sulfonic acid and glycol ether sel...
I recycle metal (gold. Silver and palladium) from pcb by hydrometallurgy process. Before i dismantled component from pcb with air hummer. But now i decided chemically by organic solution like alkane sulfonic acid and glycol ether sel...
Last replied to by David
Amir, this may help (not perfectly) ...but have a read to https://www.911metallurgist.com/blog/electrolytic-method-recovery-lead-scrap-batteries page 14 talks on Tin separation of Lead. Fortunately,...
Amir, this may help (not perfectly) ...but have a read to https://www.911metallurgist.com/blog/electrolytic-method-recovery-lead-scrap-batteries page 14 talks on Tin separation of Lead. Fortunately,...
2
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1556
VIEWS
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
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
1
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1828
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6
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5381
VIEWS
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...
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
very inexpensive steel wool=mild steel
11
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3544
VIEWS
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 ...
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 concentrates will be the most difficult to get rid of, there are smelters in Mex...
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 concentrates will be the most difficult to get rid of, there are smelters in Mex...
2
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2460
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...
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...
4
REPLIES
3641
VIEWS
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...
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 flushing into your water softener plant. The ultimatum goal is to reduce as much calciu...
For water treatment, you can use cat-ionic resins in columns to soften your water. Use brine (NaCL solution) for flushing into your water softener plant. The ultimatum goal is to reduce as much calciu...
1
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2421
VIEWS
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 ...
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, unless you already have the facilities to smelt it. If that’s the case I would ne...
Dear Omar, The ore has silver worth about $2,500 per ton, so its not worth direct smelting at that concentration, unless you already have the facilities to smelt it. If that’s the case I would ne...
chapmans flux thinner contains 50/50 Lime/flourspar. Chapmans black flux (not recommended for silver) Borax, soda ash, silica, manganese Chapmans white recommended if silver recovery is desired...