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4
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2316
VIEWS
Started by kahonde
hello i have been trying to vat leach a sulfidic gold ore using cyanide at 0.2% and a pH of 10.5-11 but gold of about 3g/t is still reporting in tails after 40 hours of leaching from a head of 5.88 g/t. HELP...vat leaching is the only method i can us...
hello i have been trying to vat leach a sulfidic gold ore using cyanide at 0.2% and a pH of 10.5-11 but gold of about 3g/t is still reporting in tails after 40 hours of leaching from a head of 5.88 g/t. HELP...vat leaching is the only method i can us...
6
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3273
VIEWS
Started by evakahwili
Hello friends, Can someone please help me with the reason why leach solution turned blue in a vat leach tank and the possible solutions to it.
Hello friends, Can someone please help me with the reason why leach solution turned blue in a vat leach tank and the possible solutions to it.
Last replied to by Launcher27
This deep blue was coming from my tank with a heavy blue foam weakening the cynide.
This deep blue was coming from my tank with a heavy blue foam weakening the cynide.
10
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3379
VIEWS
Started by biteyaboy
Is there any method to check either sodium cyanide is expired or still OK? If yes what is the procedures?
Is there any method to check either sodium cyanide is expired or still OK? If yes what is the procedures?
4
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2003
VIEWS
Started by ramine
hello i working in Crud Recovery in copper SX (solvent extraction) i separate the organic phase by bentonite clay then organic phase separated from crud ... i can load this organic to system ?
hello i working in Crud Recovery in copper SX (solvent extraction) i separate the organic phase by bentonite clay then organic phase separated from crud ... i can load this organic to system ?
Last replied to by Farhad Baghery
Hi Kevin, Could you please explain your calculation? how many clays for how much organic?
Hi Kevin, Could you please explain your calculation? how many clays for how much organic?
3
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2285
VIEWS
Started by girishchandra
Need help for recovery of copper from copper nitrate solution
Need help for recovery of copper from copper nitrate solution
1
REPLY
1365
VIEWS
Started by kenyaAurefiner
USING ACTIVATED CARBON: Hello there... Could someone help me with info about using activated carbon in heap leaching method. We have acquired goldix 570 and realized the recommended method by using activated carbon. Considering we have never used it ...
USING ACTIVATED CARBON: Hello there... Could someone help me with info about using activated carbon in heap leaching method. We have acquired goldix 570 and realized the recommended method by using activated carbon. Considering we have never used it ...
3
REPLIES
4837
VIEWS
Started by Handerson
Gold Dressing Agent (GDA) product that has Chinese origin, meets environmental requirements and reduces the leaching time and energy costs and effluent treatment.Do you know any application on a large scale? I'm the product for testing, I know some s...
Gold Dressing Agent (GDA) product that has Chinese origin, meets environmental requirements and reduces the leaching time and energy costs and effluent treatment.Do you know any application on a large scale? I'm the product for testing, I know some s...
5
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2616
VIEWS
Started by nurdyme
A mine is planning on increasing the leaching density from 40% solids to around 50% solids, with the aim of increasing the dissolution rates, although right now they are working at recoveries of 85%. what would be the effect on the kinetics of diss...
A mine is planning on increasing the leaching density from 40% solids to around 50% solids, with the aim of increasing the dissolution rates, although right now they are working at recoveries of 85%. what would be the effect on the kinetics of diss...
1
REPLY
2325
VIEWS
Started by ChemEngStudent
It will be much appreciated if i can get good articles or information about bioleaching of gold and how it differs from more traditional methods. Thanks
It will be much appreciated if i can get good articles or information about bioleaching of gold and how it differs from more traditional methods. Thanks
Last replied to by
Gold extractability was measured by cyanide leaching in the same manner before and after biooxidation. Small samples of ground ore from shake flask experiments were leached by slurrying samples of t...
Gold extractability was measured by cyanide leaching in the same manner before and after biooxidation. Small samples of ground ore from shake flask experiments were leached by slurrying samples of t...
3
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1778
VIEWS
Started by firebird
Hi everyone. I am now engaged in a CIL circuit. I tried to calculate my final gold bullion recovery after smelting but I cant. The problem is I had a total of 76kg gold fed to the grinding for 11 days.in the final circuit of the CIL a total of 4kg of...
Hi everyone. I am now engaged in a CIL circuit. I tried to calculate my final gold bullion recovery after smelting but I cant. The problem is I had a total of 76kg gold fed to the grinding for 11 days.in the final circuit of the CIL a total of 4kg of...
Last replied to by Greg Henderson
Reconciling feed gold with back-calculated gold based on change in inventory + dore gold + tails gold can be tricky as sampling of feed in a representatives manner is notoriously difficult, especiall...
Reconciling feed gold with back-calculated gold based on change in inventory + dore gold + tails gold can be tricky as sampling of feed in a representatives manner is notoriously difficult, especiall...
5
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3411
VIEWS
Started by kenyaAurefiner
Hi everyone. Recently my friend and I came across some 30 year old tailings - about 1000 tons - which was analyzed to contain mainly 0.002% gold and 3.35% ferrous materials. I have no experience in gold processing, but my friend has some. He seems to...
Hi everyone. Recently my friend and I came across some 30 year old tailings - about 1000 tons - which was analyzed to contain mainly 0.002% gold and 3.35% ferrous materials. I have no experience in gold processing, but my friend has some. He seems to...
1
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4042
VIEWS
Started by Charlie
What is the typical % solids you would generally run a CIL circuit at? Thicker will result in more retention time but does it leach gold or silver as effectively? Any negative impact on carbon? Thanks
What is the typical % solids you would generally run a CIL circuit at? Thicker will result in more retention time but does it leach gold or silver as effectively? Any negative impact on carbon? Thanks
4
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1670
VIEWS
Started by Wadzanayi
The unit operation consists of vat leaching of stamp mill dumps.The dump is created after artisanal miners surrounding the custom milling center have taken out their gravity gold. Sequence of events is as follows; Site began experiencing high sol...
The unit operation consists of vat leaching of stamp mill dumps.The dump is created after artisanal miners surrounding the custom milling center have taken out their gravity gold. Sequence of events is as follows; Site began experiencing high sol...
3
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1251
VIEWS
Started by Nyasha Jawanda
hello guys...im a metallurgy student currently attached at a heap leach practicing company mining oxide ores(low grade ores).we use cyanide for the leaching process and carbon in the adsorption section..we are currently experiencing low recoveries ...
hello guys...im a metallurgy student currently attached at a heap leach practicing company mining oxide ores(low grade ores).we use cyanide for the leaching process and carbon in the adsorption section..we are currently experiencing low recoveries ...
Last replied to by ThabisoKwenane
Check if your cyanide distribution into the heap is even. Also check your particle size distribution. You don't want to have the same size of particles throughout your heap. A varying distribution wil...
Check if your cyanide distribution into the heap is even. Also check your particle size distribution. You don't want to have the same size of particles throughout your heap. A varying distribution wil...
3
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1432
VIEWS
Started by Nyasha Jawanda
hi guys what are factors that affect gold adsorption onto carbon in carbon in solution process.
hi guys what are factors that affect gold adsorption onto carbon in carbon in solution process.
Last replied to by
Activated carbon is used to recover gold from cyanide leach solutions, owing to its large surface area. There are 3 major mechanisms controlling the rate of gold adsorption onto activated carbon: 1...
Activated carbon is used to recover gold from cyanide leach solutions, owing to its large surface area. There are 3 major mechanisms controlling the rate of gold adsorption onto activated carbon: 1...
1
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1081
VIEWS
Started by m16 mine
Is there anyway you can test presence of Gold in cyanide solution using handheld electronic instruments without the use of test tubes and chemicals.
Is there anyway you can test presence of Gold in cyanide solution using handheld electronic instruments without the use of test tubes and chemicals.
Last replied to by ThabisoKwenane
Yes. You can try using ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometry)
Yes. You can try using ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometry)
1
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1303
VIEWS
Started by Dane Smith
I have a leach feed thickener with a serious over-flocculation issue. Has anyone seen any papers/ data on the effect of synthetic flocculants on cyanide/ gold leach reactions? I know enough about the flocculant/ particle bond to know there will alway...
I have a leach feed thickener with a serious over-flocculation issue. Has anyone seen any papers/ data on the effect of synthetic flocculants on cyanide/ gold leach reactions? I know enough about the flocculant/ particle bond to know there will alway...
Last replied to by David
Hi Dane, I looked in http://www.onemine.org/ and found nothing specific to the effect of flocculant on leaching rates. I just know that too much is bad... Here is what Marsden says.
Hi Dane, I looked in http://www.onemine.org/ and found nothing specific to the effect of flocculant on leaching rates. I just know that too much is bad... Here is what Marsden says.
2
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1976
VIEWS
Started by makke
We are using steel tanks with of 3000mm diameter, 3600 height and a 2400mm cone at the bottom. Agitation through air at the bottom and 15 cbm of solution. we are looking for teh ideal slurry density (ideally 30 tons of solids) for an 18 hour agitatio...
We are using steel tanks with of 3000mm diameter, 3600 height and a 2400mm cone at the bottom. Agitation through air at the bottom and 15 cbm of solution. we are looking for teh ideal slurry density (ideally 30 tons of solids) for an 18 hour agitatio...
1
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1618
VIEWS
Started by Tumurchin
Does anyone have experience with leaching tin (cassiterite) from complex ores? Any advise or referrals will be appreciated.
Does anyone have experience with leaching tin (cassiterite) from complex ores? Any advise or referrals will be appreciated.
Last replied to by
Hello Tumurchin, I do not think leaching tin out of cassiterite or complex ores is possible. I think you can do Alkali leaching of tin slag but not cassiterite. Tin oxide does not get chlorinat...
Hello Tumurchin, I do not think leaching tin out of cassiterite or complex ores is possible. I think you can do Alkali leaching of tin slag but not cassiterite. Tin oxide does not get chlorinat...
4
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1683
VIEWS
Started by Mikhail
Dear colleaguesBefore my company faced an interesting challenge to design a mobile unit for gold leaching. The set includes: car an agitator for leaching pulp, filter press, a container of water and carbon column. Also auxiliary equipment, pumps, hos...
Dear colleaguesBefore my company faced an interesting challenge to design a mobile unit for gold leaching. The set includes: car an agitator for leaching pulp, filter press, a container of water and carbon column. Also auxiliary equipment, pumps, hos...
Last replied to by Mikhail
Hello & thank you! Russia also welcomes all)) If we talk about the ore, the gold recovery in 10 hours leaching is 85-90%, the original content of about 3 g/t, this amalgamation tails. The reagent us...
Hello & thank you! Russia also welcomes all)) If we talk about the ore, the gold recovery in 10 hours leaching is 85-90%, the original content of about 3 g/t, this amalgamation tails. The reagent us...
5
REPLIES
3396
VIEWS
Started by Andrew Eden
Hello all, I have a 40% contained copper oxide with 7% tin contained in it. And about 20 ppm Hg. What is the best way to put the copper into sulfuric acid solution and leave the Tin behind as a solid. And what to do with the mercury?
Hello all, I have a 40% contained copper oxide with 7% tin contained in it. And about 20 ppm Hg. What is the best way to put the copper into sulfuric acid solution and leave the Tin behind as a solid. And what to do with the mercury?
Last commented on by Andrew Eden
It looks like its worth a shot. Cheers inOr.
It looks like its worth a shot. Cheers inOr.
10
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2768
VIEWS
Started by biteyaboy
Currently we are processing our ore through knelson Concentrator to capture free gold, the remaining as tail we are keeping aside for froth flotation plant which is on commissioning stages. We’ve Acacia plant where our final concentrate treated as ...
Currently we are processing our ore through knelson Concentrator to capture free gold, the remaining as tail we are keeping aside for froth flotation plant which is on commissioning stages. We’ve Acacia plant where our final concentrate treated as ...
Last replied to by Jorge Quintanilla
Dear Papamet 26, could You describe your flowsheet please?
Dear Papamet 26, could You describe your flowsheet please?
2
REPLIES
1951
VIEWS
Started by New Era
Our plant is gold processing plant with 9 CIL tanks and 3 CCD thickeners and leaching hours are 36. I want your advice on we are calculating leaching and recovery based on leach feed and CIL tail of one day but practically the CIL tail represents ...
Our plant is gold processing plant with 9 CIL tanks and 3 CCD thickeners and leaching hours are 36. I want your advice on we are calculating leaching and recovery based on leach feed and CIL tail of one day but practically the CIL tail represents ...
1
REPLY
1427
VIEWS
Started by morgane
i would like to know what is the best way to leaching gold in hematite ores i have a microscopic gold about 15g by tone of ores thanks
i would like to know what is the best way to leaching gold in hematite ores i have a microscopic gold about 15g by tone of ores thanks
3
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1521
VIEWS
Started by SaltwaterServr
First, hello from Phoenix, Arizona where we have all of the beach, but none of the water. My real name is Jeff I've got several claims and about 6 more prospective areas near here that have promising looking gold ores on them, all refractory. We...
First, hello from Phoenix, Arizona where we have all of the beach, but none of the water. My real name is Jeff I've got several claims and about 6 more prospective areas near here that have promising looking gold ores on them, all refractory. We...
2
REPLIES
1061
VIEWS
Started by magwazasammy86
Hi everyone. We have a heap leach plant at our mine and we have oxide material from a mine dump.We are irrigating the using drip emitters sodium cyanide solution. The problem we are currently facing is that we are noticing the bluish-green colour at...
Hi everyone. We have a heap leach plant at our mine and we have oxide material from a mine dump.We are irrigating the using drip emitters sodium cyanide solution. The problem we are currently facing is that we are noticing the bluish-green colour at...
4
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1351
VIEWS
Started by Steven Bigelow
Hi All, Do you have any thoughts on leaching an ore that runs high in both copper oxides and silver? We have about 100 tons of old mine stockpiles on our claim that assayed 4.0% copper and 8 ounces/ton silver. The copper minerals are almost a...
Hi All, Do you have any thoughts on leaching an ore that runs high in both copper oxides and silver? We have about 100 tons of old mine stockpiles on our claim that assayed 4.0% copper and 8 ounces/ton silver. The copper minerals are almost a...
1
REPLY
1994
VIEWS
Started by Seeker
I have stripped the gold from gold plated pins of brass with a gold stripper with the following ingredients: Zinc tetracyanide Meta-nitrobenzene Sulphonic acid sodium salt Sodium Hydroxide Please suggest what would be the best chemical or che...
I have stripped the gold from gold plated pins of brass with a gold stripper with the following ingredients: Zinc tetracyanide Meta-nitrobenzene Sulphonic acid sodium salt Sodium Hydroxide Please suggest what would be the best chemical or che...
2
REPLIES
1895
VIEWS
Started by Bob Mathias
What effect do flotation reagents have on activated carbon during gold adsorption?Do they have an effect or not? What effect do they have? Do these flotation reagents get adsorbed onto the pore of activated carbon or form a superficial layer on the ...
What effect do flotation reagents have on activated carbon during gold adsorption?Do they have an effect or not? What effect do they have? Do these flotation reagents get adsorbed onto the pore of activated carbon or form a superficial layer on the ...
Last replied to by Paul Morrow
Hi Bob, It depends on the reagent. Carbon, being naturally hydrophobic, will float easily, with a frother and that could cause unwanted foam and floating of the carbon. Fuel oil based collectors will...
Hi Bob, It depends on the reagent. Carbon, being naturally hydrophobic, will float easily, with a frother and that could cause unwanted foam and floating of the carbon. Fuel oil based collectors will...
2
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4335
VIEWS
Started by Arnmax
Currently in our gold plant we are getting a huge change in activated carbon in circuit inventory during opening and closing stock from time to time. Now I have been given a project on carbon movement study in which I will investigate possible ways...
Currently in our gold plant we are getting a huge change in activated carbon in circuit inventory during opening and closing stock from time to time. Now I have been given a project on carbon movement study in which I will investigate possible ways...
3
REPLIES
2597
VIEWS
Started by Gombera
Dear Professionals, what are important steps should I follow when I want to design copper agitated leach tanks? Cheers, Heri
Dear Professionals, what are important steps should I follow when I want to design copper agitated leach tanks? Cheers, Heri
Last replied to by Marshal Meru
Also see https://www.911metallurgist.com/blog/metallurgical-testing-lpf-process https://www.911metallurgist.com/blog/copper-lpf-leach-precipitation-flotation-process https://www.911metallurgist.c...
Also see https://www.911metallurgist.com/blog/metallurgical-testing-lpf-process https://www.911metallurgist.com/blog/copper-lpf-leach-precipitation-flotation-process https://www.911metallurgist.c...
1
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1234
VIEWS
Started by Greg OConnor
Hi all, I have a very simple question for which I am having trouble to find an answer. Can anyone direct me to studies which compare the leach rates of chalcopyrite with other copper minerals - particularly sulfides? There seems to be plenty on cy...
Hi all, I have a very simple question for which I am having trouble to find an answer. Can anyone direct me to studies which compare the leach rates of chalcopyrite with other copper minerals - particularly sulfides? There seems to be plenty on cy...
Last replied to by David
Hi Greg, I am waiting on input from a friend on this. From now this may guide you a bit: https://www.911metallurgist.com/blog/acid-solubility-copper-mineral-species
Hi Greg, I am waiting on input from a friend on this. From now this may guide you a bit: https://www.911metallurgist.com/blog/acid-solubility-copper-mineral-species
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Max, Hello. I hope you can help. Ok assay's and lab yes gold arsenic and gold locked in sulfides with micro. I have tried roast and smelt, nope a matte. Lab said a assay flux with lead, it worked but ...