Hi thank you sir for this knowledgeable video .Can we do cynide leaching in rainy season if raw material is available bcos its done in open hope rain water will not disturb the chemical reactions or can we cover the tank with shed
The rain would dilute the chemicals to some extent depending on how much rain you get. Covering the system to keep the rain out will protect from problems. make sure that heavy rain cannot cause the system to overflow.
Have you characterized your ore well? For example, what is the particle size of the gold? heap leaching does not work for every ore. You night note that our tailings pad is essentially a heap leach.
I'm looking to leach my concentrates. I have a massive amount of.fines cought in bothe sluice.amd jig cons. Difficult to seperate. I'm working with about 20 gallons of cons a week. Any suggestions
I am not certain, but the concentrated thiourea stripping solution I am using with my resin cements gold onto both copper and stainless steel. It should be easy to test, try running it over some zinc sheet.
also wouldnt it make more sense to allow for slow circulation from bottom of vat to top of vat for a given period of time (lets say arbitrarily 2 weeks) and then run a full recirculation cycle through the carbon for a given period of time (lets say 3 days). Test and adjust cyanide levels regularly during 1st phase agitation? and then somehow test how much mineral was liberated % before carbon circulation loop and if at the end of the 3 days how much has been bonded to the carbon to see if your liberation = extraction to be sure you got at least as much recovered out of the solution that is pregnant? Or perhaps the whole carbon flow through process is designed in a more economical diy way more inline with current research (I'm not even sure what that is as I'm new to learning this whole leaching process). Just me few thoughts right off the bat.
Is this vat, tank , or heap leaching. In agitated tanks it would usually be 40-72 hours retention time for the ore. The carbon adsorbs the gold in a matter of minutes if is is in clean solution. Everything always has to be tested and verified as all the variables are quite ore dependent.
@@hardrockuniversity7283 hmmm good question on the type of process. I was just adding my thoughts on this gentleman's process. To try and understand better and aid in the discussion. But let's forget about that and allow me to ask you... If this was your operation and you struck gold based on what you've researched. You found the copper / gold ore, the batroydal hematite Carlin type deposit with pyrite and arsenopyrite, and your sure it's mimicking the same situation on your grounds, but here's the catch, you have no money. What would be the most efficient way to complete the liberation of this small almost invisible deposit of high grade gold? Vat with agitation? If so, what could be used to agitate
@@kylestrokelitus360 If oxygen is a plus (as with cyanide) or neutral to the chemistry, a Pachuca Tank is very simple. You could also use a venturi pump like they use in dredges.
when the vast are filled with crushed ore, are then then filled with water (does it have to be a specific type of water)? Then when the PH is 1st tested and adjust with lime, what is the desired Ph? then when adding in the cyanide is it sodium cyanide? what is the achieveable ph then to keep it at? 11/12? then what is the carbon used (grill charcoal/ anthracite / graphite) and whats is the screen size of it classified to? how do you release the Au from the carbon? and finally whats the safest and most cost effective best practice for neutralizing the ph of the fluid for an eco friendly release of the spent solution after youve maximize the extraction and are complete?
Ph needs to be over 10 at an absolute minimum for CN stability. 11 is better. Lime can do that, Sodium Cyanide is the usual source of the CN. You don't neutralize the fluid, you re-use it. Before you re-use, you replenish the chemicals to the desired concentrations. The standard carbo is activated coconut shell charcoal. Typically something like 6-12. That means it would go through a six mesh sieve and be stopped by a 12 mesh sieve.
@@hardrockuniversity7283 very much appreciated. Is it difficult to purchase sodium cyanide, or can anyone get it? I've read a blurp from a study in which they found accidentally that cornstarch could be used to substitute for Sodium Cyanide in the leach. I didn't have money to purchase the study but I thought that was awesome. I wish I knew more cause I'm not confident in my lack of knowledge of chemistry to make a critical error with allowing the pH to jump and create that insanely deadly mustard gas. Eeek..
@@kylestrokelitus360 I heard the same thing about corn starch, but the study has to do with cornstarch being used to precipitate gold OUT of solution, not dissolve it in the first place. It also only works with the bromide complex of gold, so is useless in thio or cyanide leached. As usual, some one starts with a nugget of truth and goes completely sideways.
Sir I appreciated this video. Do you have any ideas for a small scale miner who is trying to seperate gold from tullerides. Size is in the 4-500 range.and smaller
Are you the same person who asked a similar question yesterday? I have no real experience refining gold from arsenopyrite. 911 metallurgist has an article on the subject : www.911metallurgist.com/blog/arsenopyrite-gold-recovery#gsc.tab=0 That may give you some ideas. Keith
Using a thiosulfate leach solution like eco-goldex will dramatically reduce any preg-robbing by the ore, but you will have to use a resin instead of carbon to get the gold out of solution. Carbon does not adsorb the gold-thio complex very well.
Hmm. Ground control is very site specific and important to get right- probably difficult to do ageneral lesson on. we'll see what comes up. WRT your situation, is it pretty much virgin ground or already well mined?
If you are talking about me, my email is hardrocku@outlook.com. If you are talking about Nikunj, you can email me and I will forward it for his consideration. Keith
It is much more expensive, it dissolves much more than just the gold, and it creates vastly more toxic waste. Cyanide is cheap, works at low concentration, and is relatively selective. It is also easier to handle and dispose of. Keith
@@hardrockuniversity7283 in a heap leach or stacked engineered leach field that combines several heaps over an entire mountside, how does a closeby resident test to see if this oddly abandoned site is safe for the eco system? There 55 gallon drums halfway disolved and corroded at the collection and settling ponds they used as what appears to be a recirculation loop, and one final dump pond at the bottom where a very convinent roadway is located. the bottom pool has a dozer wide pathway ripped through it and pushed across the final access dirt road before the gate and main roadways, almsot as if it was quick, rushed, illegal, and completely abanodoned. Theres no records on MRdata.gov, theres no "no tresspassing" or mine staked, just remants of what was a definiete operation less than 10 yrs ago. The crushed ore is rather large for leaching and upon inspection has alot of metal mineral throught many acres of already crushed and heaped pads. ITs odd. 1st I wanna know if its safe for the eco system know what I know, and 2nd Hell I wanna procees this abandoned area since most of the work has already been done. I've found many many good grade material. so Its insanely absurd to me. any insight would help. Kyle I'd appreciate to communicate through other means other than public view. lmk. Thanks
@@kylestrokelitus360 My email is HardRockU@outlook.com. Cyanide is not generally stable in the environment, but is easy to test for. Heavy metal would be a more likely issue. If you have a soil or water testing lab nearby that can test for organics, toxins, and heavy metal you could take soil samples, or if a water lab, soak the soil in pure water first, filter, and then have tested.
Just asking, do they test gold when it's in solution with Stannous Chloride by eye dropping gold solution onto tissue paper then eye dropping Stannous Chloride onto gold solution and if gold is present it turns black , is this how they test for gold in solution ,as that is how when dissolving gold computer components in solution you test for gold in solution .
I suppose it might depend on exactly what solution is being tested and the concentration. They have cyanide solutions with a relatively small amount of gold compared to scrap recycling. It might work though.
It will work this is what I use if it shows a light amount of gold still left in solution it'll be a lighter lavender color if it's still has a lot of gold in it it'll turn out dark purple to Black works every time if it's in there no second-guess
its sooo big of you to share your incredible knowledge to Nikunj and all of us too. thank you, and I for one sincerely appreciate that.
Thank you. I enjoy it and sometimes it is very rewarding to make someone's life happier.
Your a righteous dude. You KNOW what your talking about, and share it freely.. God bless you
Thank you sir, I hope he does. But if you do it for reward it's not the right reason, is it?
Hi thank you sir for this knowledgeable video .Can we do cynide leaching in rainy season if raw material is available bcos its done in open hope rain water will not disturb the chemical reactions or can we cover the tank with shed
The rain would dilute the chemicals to some extent depending on how much rain you get. Covering the system to keep the rain out will protect from problems. make sure that heavy rain cannot cause the system to overflow.
agitation tanks are expensive can you kindly give me information on heap leaching,i would like to pursue that line of heap leaching
Have you characterized your ore well? For example, what is the particle size of the gold? heap leaching does not work for every ore. You night note that our tailings pad is essentially a heap leach.
Thank very much keith!!!!
This will help a lot let me try and then will let you know more about it.
Email me any questions if you have them. Luck!
@@hardrockuniversity7283 Please provide your what's app details
@@Sarah-qe7pt why would anyone give you that?
@@kylestrokelitus360 It's easier communication in some countries . Thanks for asking
I'm looking to leach my concentrates. I have a massive amount of.fines cought in bothe sluice.amd jig cons. Difficult to seperate. I'm working with about 20 gallons of cons a week. Any suggestions
Do you know exactly what size the gold is? How much magnetics are there also?
whats the ratio of water and the sample. lets say 10 tons of sample? on a CIP set up.
In Sudan we're using thioeurea and activated carbon, can I use merril crowe with thioeurea?
I am not certain, but the concentrated thiourea stripping solution I am using with my resin cements gold onto both copper and stainless steel. It should be easy to test, try running it over some zinc sheet.
@@hardrockuniversity7283 thanks, you're answer is helpful
@@rayanahmed8724 You are most welcome.
also wouldnt it make more sense to allow for slow circulation from bottom of vat to top of vat for a given period of time (lets say arbitrarily 2 weeks) and then run a full recirculation cycle through the carbon for a given period of time (lets say 3 days). Test and adjust cyanide levels regularly during 1st phase agitation? and then somehow test how much mineral was liberated % before carbon circulation loop and if at the end of the 3 days how much has been bonded to the carbon to see if your liberation = extraction to be sure you got at least as much recovered out of the solution that is pregnant? Or perhaps the whole carbon flow through process is designed in a more economical diy way more inline with current research (I'm not even sure what that is as I'm new to learning this whole leaching process). Just me few thoughts right off the bat.
Is this vat, tank , or heap leaching. In agitated tanks it would usually be 40-72 hours retention time for the ore. The carbon adsorbs the gold in a matter of minutes if is is in clean solution. Everything always has to be tested and verified as all the variables are quite ore dependent.
@@hardrockuniversity7283 hmmm good question on the type of process. I was just adding my thoughts on this gentleman's process. To try and understand better and aid in the discussion.
But let's forget about that and allow me to ask you... If this was your operation and you struck gold based on what you've researched. You found the copper / gold ore, the batroydal hematite Carlin type deposit with pyrite and arsenopyrite, and your sure it's mimicking the same situation on your grounds, but here's the catch, you have no money.
What would be the most efficient way to complete the liberation of this small almost invisible deposit of high grade gold? Vat with agitation? If so, what could be used to agitate
@@kylestrokelitus360 If oxygen is a plus (as with cyanide) or neutral to the chemistry, a Pachuca Tank is very simple. You could also use a venturi pump like they use in dredges.
when the vast are filled with crushed ore, are then then filled with water (does it have to be a specific type of water)? Then when the PH is 1st tested and adjust with lime, what is the desired Ph? then when adding in the cyanide is it sodium cyanide? what is the achieveable ph then to keep it at? 11/12? then what is the carbon used (grill charcoal/ anthracite / graphite) and whats is the screen size of it classified to? how do you release the Au from the carbon? and finally whats the safest and most cost effective best practice for neutralizing the ph of the fluid for an eco friendly release of the spent solution after youve maximize the extraction and are complete?
Ph needs to be over 10 at an absolute minimum for CN stability. 11 is better. Lime can do that,
Sodium Cyanide is the usual source of the CN.
You don't neutralize the fluid, you re-use it. Before you re-use, you replenish the chemicals to the desired concentrations.
The standard carbo is activated coconut shell charcoal. Typically something like 6-12. That means it would go through a six mesh sieve and be stopped by a 12 mesh sieve.
@@hardrockuniversity7283 very much appreciated. Is it difficult to purchase sodium cyanide, or can anyone get it? I've read a blurp from a study in which they found accidentally that cornstarch could be used to substitute for Sodium Cyanide in the leach. I didn't have money to purchase the study but I thought that was awesome. I wish I knew more cause I'm not confident in my lack of knowledge of chemistry to make a critical error with allowing the pH to jump and create that insanely deadly mustard gas. Eeek..
@@kylestrokelitus360 I heard the same thing about corn starch, but the study has to do with cornstarch being used to precipitate gold OUT of solution, not dissolve it in the first place. It also only works with the bromide complex of gold, so is useless in thio or cyanide leached. As usual, some one starts with a nugget of truth and goes completely sideways.
Sir I appreciated this video. Do you have any ideas for a small scale miner who is trying to seperate gold from tullerides. Size is in the 4-500 range.and smaller
Are you the same person who asked a similar question yesterday? I have no real experience refining gold from arsenopyrite. 911 metallurgist has an article on the subject :
www.911metallurgist.com/blog/arsenopyrite-gold-recovery#gsc.tab=0
That may give you some ideas.
Keith
Is zinc good for gold precipitation from cyanide solution
It was used many years ago before activated carbon. It was replaced because the carbon is more efficient. For details, Google 'Merril-Crowe Process"
i want to know how to treat carbonaceous matter in vat leach?
Using a thiosulfate leach solution like eco-goldex will dramatically reduce any preg-robbing by the ore, but you will have to use a resin instead of carbon to get the gold out of solution. Carbon does not adsorb the gold-thio complex very well.
how can i dose.
@@kelvinmjuni2627 I am still working on the resin extraction.
can you do a video on stope design, my ore body is nearly vertical, 2ft wide. Thanks.
Hmm. Ground control is very site specific and important to get right- probably difficult to do ageneral lesson on. we'll see what comes up.
WRT your situation, is it pretty much virgin ground or already well mined?
Does anyone know how I would get in touch with this gentleman I will be working with some new operations in Africa
If you are talking about me, my email is hardrocku@outlook.com. If you are talking about Nikunj, you can email me and I will forward it for his consideration.
Keith
Hi i am from tanzania i want to know why we are not using aqua regia in leaching ?
It is much more expensive, it dissolves much more than just the gold, and it creates vastly more toxic waste.
Cyanide is cheap, works at low concentration, and is relatively selective. It is also easier to handle and dispose of.
Keith
@@hardrockuniversity7283 in a heap leach or stacked engineered leach field that combines several heaps over an entire mountside, how does a closeby resident test to see if this oddly abandoned site is safe for the eco system? There 55 gallon drums halfway disolved and corroded at the collection and settling ponds they used as what appears to be a recirculation loop, and one final dump pond at the bottom where a very convinent roadway is located. the bottom pool has a dozer wide pathway ripped through it and pushed across the final access dirt road before the gate and main roadways, almsot as if it was quick, rushed, illegal, and completely abanodoned. Theres no records on MRdata.gov, theres no "no tresspassing" or mine staked, just remants of what was a definiete operation less than 10 yrs ago. The crushed ore is rather large for leaching and upon inspection has alot of metal mineral throught many acres of already crushed and heaped pads. ITs odd. 1st I wanna know if its safe for the eco system know what I know, and 2nd Hell I wanna procees this abandoned area since most of the work has already been done. I've found many many good grade material. so Its insanely absurd to me. any insight would help. Kyle I'd appreciate to communicate through other means other than public view. lmk. Thanks
@@kylestrokelitus360 My email is HardRockU@outlook.com. Cyanide is not generally stable in the environment, but is easy to test for. Heavy metal would be a more likely issue. If you have a soil or water testing lab nearby that can test for organics, toxins, and heavy metal you could take soil samples, or if a water lab, soak the soil in pure water first, filter, and then have tested.
YeeeeeeeHaaaaaaa
Just asking, do they test gold when it's in solution with Stannous Chloride by eye dropping gold solution onto tissue paper then eye dropping Stannous Chloride onto gold solution and if gold is present it turns black , is this how they test for gold in solution ,as that is how when dissolving gold computer components in solution you test for gold in solution .
I suppose it might depend on exactly what solution is being tested and the concentration. They have cyanide solutions with a relatively small amount of gold compared to scrap recycling. It might work though.
It will work this is what I use if it shows a light amount of gold still left in solution it'll be a lighter lavender color if it's still has a lot of gold in it it'll turn out dark purple to Black works every time if it's in there no second-guess
@@robwiddisonwiddison5654 can i have your contact?
Can i have your contact?
What.....I'm sorry can you repeat that I was watching the CAT hahah...kitty.
Editing can do interesting things. :-)