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465
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Started by Millza7979
Are coarse bottle roll tests a good way of simulating column leach tests? Do they tend to get the same gold recoveries?
Are coarse bottle roll tests a good way of simulating column leach tests? Do they tend to get the same gold recoveries?
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435
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Started by jmambsu
In CIL/CIP, what is the minimum density difference (carbon vs. pulp density) where the carbon will start to settle? And the limits of agitation on carbon settling?
In CIL/CIP, what is the minimum density difference (carbon vs. pulp density) where the carbon will start to settle? And the limits of agitation on carbon settling?
7
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468
VIEWS
Started by Seeker
Somebody, please help me! I want to know about the recovery of precious metals from the spent catalyst used in the manufacturing of lubricants. Thanks in advance!
Somebody, please help me! I want to know about the recovery of precious metals from the spent catalyst used in the manufacturing of lubricants. Thanks in advance!
1
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404
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Started by Adimulu
Hello , Is mineral processing industry ready for industry 4.0 , smart plants that can respond in real time or close to real time and use machine learning. It could be more productive ,fun and fascinating to see this in mineral processing. 😉
Hello , Is mineral processing industry ready for industry 4.0 , smart plants that can respond in real time or close to real time and use machine learning. It could be more productive ,fun and fascinating to see this in mineral processing. 😉
1
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438
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Started by Austin Muvimi
Can someone please help me on how to calculate leach residence time, adsorption residence time and pulp retention time in CIP
Can someone please help me on how to calculate leach residence time, adsorption residence time and pulp retention time in CIP
Last replied to by SmartDog
Is this for an existing operation where you want to know what is going on or for a new operation? If it is an existing operation an approximation can be made by knowing the flow rates and the volumes...
Is this for an existing operation where you want to know what is going on or for a new operation? If it is an existing operation an approximation can be made by knowing the flow rates and the volumes...
1
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503
VIEWS
Started by Han
First of all,for the processing of gold and tellurium ores,how exactly does the pos-roasting(calsine ores contain % 60- 62 Fe ) process work,what is the way to obtain tellurium. Second,which do you prefer for chemical analysis,aquea regea or fire ass...
First of all,for the processing of gold and tellurium ores,how exactly does the pos-roasting(calsine ores contain % 60- 62 Fe ) process work,what is the way to obtain tellurium. Second,which do you prefer for chemical analysis,aquea regea or fire ass...
1
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479
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Started by Ceverett
Has anybody tried using a peristaltic pump to transport carbon using little to no water? Our concern is that the carbon will grind against itself and fracture into smaller pieces that make be lost to the undersize of our tailing screen.
Has anybody tried using a peristaltic pump to transport carbon using little to no water? Our concern is that the carbon will grind against itself and fracture into smaller pieces that make be lost to the undersize of our tailing screen.
Last replied to by SmartDog
The issue of carbon degrading due to pumping at high solids concentrations is an issue regardless of the type of pump. Centrifugal pumps can exacerbate this with the impellor and additional grinding...
The issue of carbon degrading due to pumping at high solids concentrations is an issue regardless of the type of pump. Centrifugal pumps can exacerbate this with the impellor and additional grinding...
2
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578
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Started by WTandC
In a review of an existing gold operation the PFD shows their SART circuit after the CIP and cyanide thickening circuits. As CNCu complexes are an issue can the SART circuit be placed after the leach circuit and before the CIP circuit?
In a review of an existing gold operation the PFD shows their SART circuit after the CIP and cyanide thickening circuits. As CNCu complexes are an issue can the SART circuit be placed after the leach circuit and before the CIP circuit?
Last commented on by SmartDog
CIP = carbon in PULP
CIP = carbon in PULP
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564
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Started by peter-colo
I have a non-magnetic concentrate consisting of monazite, xenotime and euxenite rich in REE. This concentrate has locked and free values containing both PGMs and Au. I am investigating ways on how I could potentially leach the concentrate selective...
I have a non-magnetic concentrate consisting of monazite, xenotime and euxenite rich in REE. This concentrate has locked and free values containing both PGMs and Au. I am investigating ways on how I could potentially leach the concentrate selective...
1
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490
VIEWS
Started by martie
Hello! Can anyone please explain to me why the presence of titanium is a challenge during the separation of rare earth elements by SX?
Hello! Can anyone please explain to me why the presence of titanium is a challenge during the separation of rare earth elements by SX?
1
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532
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Started by Austin Muvimi
Hi guys. I want to start Vat leaching. Bottle roll results are Au 2.6g/t and Cu 15.2g/t. Is there a method of calculating the amount of cyanide to be mixed in the make-up tank according to the required cyanide strength in relation to the amount of wa...
Hi guys. I want to start Vat leaching. Bottle roll results are Au 2.6g/t and Cu 15.2g/t. Is there a method of calculating the amount of cyanide to be mixed in the make-up tank according to the required cyanide strength in relation to the amount of wa...
1
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467
VIEWS
Started by alonso771
Hi everyone, I'm looking for a paper that is mentioned on this website,
Hi everyone, I'm looking for a paper that is mentioned on this website,
Hydrochloric Acid Copper LeachingThe paper is: Harvey, W. W. and Dudas, F. O., “Hydrochloric Acid Leach Processes for Copper Concentrates,...
Last replied to by SmartDog
The link you posted IS the preprint. Alternatively you can download it form https://www.onemine.org (charges an access fee).
The link you posted IS the preprint. Alternatively you can download it form https://www.onemine.org (charges an access fee).
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600
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Started by Mining Mogul
Hello im leaching my sands with a grade of 2.25. Head has been reporting above 2.83g/t for more than 7 days without without reducing, the tail is 0.02 and 0.00 in some days. Cyanide strength is at 0.2%. What do I do to reduce the number of days leac...
Hello im leaching my sands with a grade of 2.25. Head has been reporting above 2.83g/t for more than 7 days without without reducing, the tail is 0.02 and 0.00 in some days. Cyanide strength is at 0.2%. What do I do to reduce the number of days leac...
Last replied to by SmartDog
What does your test work show? Compare how you are operating against the lab & pilot testing. You did do lab & pilot testing didn't you?
What does your test work show? Compare how you are operating against the lab & pilot testing. You did do lab & pilot testing didn't you?
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801
VIEWS
Started by Philipo
Hello Guys;I work at a CIP Gold processing plant. Currently the CIP tank has a problem with the slurry flow. There are 9 tanks, 2 leaching and 7 adsorption. Slurry from some tanks donot flow to the next tank, like from tank#7 to tank#8. Besides the d...
Hello Guys;I work at a CIP Gold processing plant. Currently the CIP tank has a problem with the slurry flow. There are 9 tanks, 2 leaching and 7 adsorption. Slurry from some tanks donot flow to the next tank, like from tank#7 to tank#8. Besides the d...
Last replied to by rob riggir
Hi Philipo, Just a further comment on tank agitators; Tank agitators should be designed to fully suspend the slurry in the tank by themselves and also to re-suspend settled solids after a power supp...
Hi Philipo, Just a further comment on tank agitators; Tank agitators should be designed to fully suspend the slurry in the tank by themselves and also to re-suspend settled solids after a power supp...
1
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492
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Started by martie
Hello, I am undertaking a study on the dry digestion of high silica slags from the electric arc furnace. Does anyone have any knowledge on the impact of having a major amorphous component in the slag on the performance of dry digestion/ leaching? Or ...
Hello, I am undertaking a study on the dry digestion of high silica slags from the electric arc furnace. Does anyone have any knowledge on the impact of having a major amorphous component in the slag on the performance of dry digestion/ leaching? Or ...
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845
VIEWS
Started by Lazaro
Hello!! I want to know how can I determine if the leaching is complete or not during vat leaching process of Gold, and if there is a method what are the chemistry behind that process.Thanks
Hello!! I want to know how can I determine if the leaching is complete or not during vat leaching process of Gold, and if there is a method what are the chemistry behind that process.Thanks
Last replied to by Tich
Basic chemistry for color test is from the reactivity series,. in a gold solution if you add zinc,The gold will be displaced in the solution because Zinc is more reactive. Gold will deposit, the gold...
Basic chemistry for color test is from the reactivity series,. in a gold solution if you add zinc,The gold will be displaced in the solution because Zinc is more reactive. Gold will deposit, the gold...
3
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577
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Started by Buurman
We have a shortage of O2 currently and air is not sufficient, we can't get H2O2 also. Will NaClO have any negative downstream effects if I use it on the gold extraction plant?
We have a shortage of O2 currently and air is not sufficient, we can't get H2O2 also. Will NaClO have any negative downstream effects if I use it on the gold extraction plant?
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539
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626
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Started by Jeffreybch
Hello, I have several tanks where I leach (CIP) gold ore, the solid / liquid ratio is 40% solids. The tanks are about 2 meters by 2 meters. We have several air pipes adding air to aid the chemistry plus a central agitator. I’d really apprec...
Hello, I have several tanks where I leach (CIP) gold ore, the solid / liquid ratio is 40% solids. The tanks are about 2 meters by 2 meters. We have several air pipes adding air to aid the chemistry plus a central agitator. I’d really apprec...
Last replied to by rob riggir
Best to talk to Mixtec in Perth. They have done good work for me in the past. Cheers
Best to talk to Mixtec in Perth. They have done good work for me in the past. Cheers
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597
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Started by Nand
Dear all, I have a loaded D2EHPA phase with Cu, Co and Li and want to selectively strip them by controlling the equilibrium pH (with H2SO4 mainly). I have some selectivity but I want to increase it by using multiple counter current stages in a mix...
Dear all, I have a loaded D2EHPA phase with Cu, Co and Li and want to selectively strip them by controlling the equilibrium pH (with H2SO4 mainly). I have some selectivity but I want to increase it by using multiple counter current stages in a mix...
2
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761
VIEWS
Started by Seeker
Do Rhodium, Palladium & Platinum make their hydroxides in the molten sodium hydroxide? Please help! Thanks in advance!
Do Rhodium, Palladium & Platinum make their hydroxides in the molten sodium hydroxide? Please help! Thanks in advance!
Last commented on by Wieslaw Wodecki
Dziękuję David za wyjaśnienie skąd wzięło się przekłamanie. Niestety translatory nie zawsze dobrze tłumaczą zwroty techniczne.
Dziękuję David za wyjaśnienie skąd wzięło się przekłamanie. Niestety translatory nie zawsze dobrze tłumaczą zwroty techniczne.
2
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672
VIEWS
Started by Seeker
I have 10 grams of gold in 3 liters of sodium cyanide solution. I want to recover it with coconut shell based granular activated carbon-size 2.36 mm. How much carbon (by weight) do I need to recover this gold? I would be burning this carbon for go...
I have 10 grams of gold in 3 liters of sodium cyanide solution. I want to recover it with coconut shell based granular activated carbon-size 2.36 mm. How much carbon (by weight) do I need to recover this gold? I would be burning this carbon for go...
Last replied to by rob riggir
Be careful burning the carbon as you can lose some of the gold in fly ash. Best to ash it slowly in a muffle furnace and then smelt with fluxes to remove impurities. Cheers
Be careful burning the carbon as you can lose some of the gold in fly ash. Best to ash it slowly in a muffle furnace and then smelt with fluxes to remove impurities. Cheers
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1168
VIEWS
Started by redcastle
I've posted here before about a project I've got that has problems with high clay content requiring large cement addition for percolation. Part of the testwork looked at simply crushing it and agitating in a vessel and it got decent recovery. I was ...
I've posted here before about a project I've got that has problems with high clay content requiring large cement addition for percolation. Part of the testwork looked at simply crushing it and agitating in a vessel and it got decent recovery. I was ...
Last replied to by rob riggir
Vat leach is really only good for high grade, low throughput - 1 man and a dog type operation. For the grade and clay you have you should just go for standard agitated leach and activated carbon ...
Vat leach is really only good for high grade, low throughput - 1 man and a dog type operation. For the grade and clay you have you should just go for standard agitated leach and activated carbon ...
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747
VIEWS
Started by MatthieuPrivat
The main fluorochemical reagent for acid mist suppression will be discontinued next year after facing envirronmental issues. The alternative seems to be Mistop, a 20 years experienced solution, sustainable, currently used in several operations worldw...
The main fluorochemical reagent for acid mist suppression will be discontinued next year after facing envirronmental issues. The alternative seems to be Mistop, a 20 years experienced solution, sustainable, currently used in several operations worldw...
Last replied to by MatthieuPrivat
Hi Todd, Mistop is for Cu and Zn EW. It is recommended to use Mistop in addition to mechanical barriers like floating balls. 3M FC-1100 solution is going to be discontinued soon.
Hi Todd, Mistop is for Cu and Zn EW. It is recommended to use Mistop in addition to mechanical barriers like floating balls. 3M FC-1100 solution is going to be discontinued soon.
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1053
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Started by oro
I recently built and started up a small CIP plant and came across this simple titration calculation recommended by A K Williams. The math is simple and I assume the formula is accurate - but would like to confirm. As follows: 1. make up 1 liter...
I recently built and started up a small CIP plant and came across this simple titration calculation recommended by A K Williams. The math is simple and I assume the formula is accurate - but would like to confirm. As follows: 1. make up 1 liter...
2
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860
VIEWS
Started by Mondu Akura
I am looking for Hydrometallurgical options to extract gold from Calaverite or Gold-Telluride using conventional leaching techniques instead of sending concentrates (esp. of froth flotation) to further pyrometallurgical pretreatment prior to leaching...
I am looking for Hydrometallurgical options to extract gold from Calaverite or Gold-Telluride using conventional leaching techniques instead of sending concentrates (esp. of froth flotation) to further pyrometallurgical pretreatment prior to leaching...
Last commented on by Mondu Akura
Gratitude with appreciations SmartDog. The link proves more than helpful, almost solved my problem. I will conduct leach tests basing on the options presented in the link, maybe altering leaching para...
Gratitude with appreciations SmartDog. The link proves more than helpful, almost solved my problem. I will conduct leach tests basing on the options presented in the link, maybe altering leaching para...
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932
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Started by Dossa
How can i recover gold from refractory gold ore having high content of sulfur by chemical treatment?
How can i recover gold from refractory gold ore having high content of sulfur by chemical treatment?
Last replied to by metallurge
The best (environmental friendly and efficient) method would be the roasting process. in the roasting process energy from oxidation can be recovered as steam / electrical power and the sulfur is conve...
The best (environmental friendly and efficient) method would be the roasting process. in the roasting process energy from oxidation can be recovered as steam / electrical power and the sulfur is conve...
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898
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Started by Gabriel
We will start a RIL operation and we will use kerosene to passivate carbonaceous matter. I would like to know if there is any method of kerosene analysis.
We will start a RIL operation and we will use kerosene to passivate carbonaceous matter. I would like to know if there is any method of kerosene analysis.
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743
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Started by Samuel Trindade
Hello Gents! I've occasionally facing some recovery problems. I've done some diagnostic leaching tests and it seems to have encapsulated gold in sulphide. Crossing a lot of process data I've noticed a subtle relation between increasing in tailing gr...
Hello Gents! I've occasionally facing some recovery problems. I've done some diagnostic leaching tests and it seems to have encapsulated gold in sulphide. Crossing a lot of process data I've noticed a subtle relation between increasing in tailing gr...
3
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945
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Started by Paulo V
Hi, I have been doing cyanide leaching test for samples obtained from piles of a material that has been weathered for months. The recovery achived was from 60-80% for direct leaching of the head and 90-95% for gravimetric concentrates obtained fro...
Hi, I have been doing cyanide leaching test for samples obtained from piles of a material that has been weathered for months. The recovery achived was from 60-80% for direct leaching of the head and 90-95% for gravimetric concentrates obtained fro...
Last replied to by SmartDog
Sodium hydroxide and or lime
Sodium hydroxide and or lime
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757
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Started by Graeme
I am looking to conduct a brine leach on a Pb-Zn-minor Ag ore, could someone please give advice/pointers (for eg: what acid to use?). Thanks
I am looking to conduct a brine leach on a Pb-Zn-minor Ag ore, could someone please give advice/pointers (for eg: what acid to use?). Thanks
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Thanks for that guys, it was very helpful AJ