- To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN
- Use Add New Topic to ask a New Question/Discussion about Hydrometallurgy.
- OR Select a Topic that Interests you.
- Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).
Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. - Use Add Comment = to comment on someone else’s Reply in an already active Topic/Discussion.
3
REPLIES
1736
VIEWS
Started by Alex Loutou
Dear Colleague, I work with CCD where tails with 50% solid with cyanide content dumping to detoxification. I plan to increase the % solid to 90-95%. The objective is re use solution cyanide mean reduce cyanide feed to detox. How I can get it with ...
Dear Colleague, I work with CCD where tails with 50% solid with cyanide content dumping to detoxification. I plan to increase the % solid to 90-95%. The objective is re use solution cyanide mean reduce cyanide feed to detox. How I can get it with ...
1
REPLY
1501
VIEWS
Started by martie
Hi there I need help with a laboratory procedure for gold leaching with cyanide please
Hi there I need help with a laboratory procedure for gold leaching with cyanide please
2
REPLIES
1822
VIEWS
Started by Mshindo jr
I am currently working as a graduate metallurgist at Anglo-gold Ashanti - Geita Gold Mine in Tanzania. Regarding the sulphide nature of the ore we treat at the plant, we normally add Lead Nitrate so as to suppress the Sulphide minerals from been leac...
I am currently working as a graduate metallurgist at Anglo-gold Ashanti - Geita Gold Mine in Tanzania. Regarding the sulphide nature of the ore we treat at the plant, we normally add Lead Nitrate so as to suppress the Sulphide minerals from been leac...
1
REPLY
1505
VIEWS
Started by Goldsing
I would like to understand the Cold Caustic Cyanide Pre Elution Wash methodology for assistance in removing excessive Copper when/if a problem? Is this a simple 'washing' process or is the process complexed i.e Different equipment and circuit require...
I would like to understand the Cold Caustic Cyanide Pre Elution Wash methodology for assistance in removing excessive Copper when/if a problem? Is this a simple 'washing' process or is the process complexed i.e Different equipment and circuit require...
Last commented on by Austin Muvimi
What strengths quantities of caustic soda and cyanide?
What strengths quantities of caustic soda and cyanide?
2
REPLIES
1266
VIEWS
Started by priya
HI, we are currently working with the project of processing fly ash (source Venezuela) and producing vanadium pentoxide from the same. We are fusing fly ash with sodium salt and then leaching the resultant to produce AMV and then vanadium pentoxide....
HI, we are currently working with the project of processing fly ash (source Venezuela) and producing vanadium pentoxide from the same. We are fusing fly ash with sodium salt and then leaching the resultant to produce AMV and then vanadium pentoxide....
Last replied to by David
I am aware of an additive used to treat coal firing combustion chambers so that the Vanadium Pentoxide becomes friable and easily removed from the interior surfaces. It may be possible that this same ...
I am aware of an additive used to treat coal firing combustion chambers so that the Vanadium Pentoxide becomes friable and easily removed from the interior surfaces. It may be possible that this same ...
2
REPLIES
1974
VIEWS
Started by Kent_725
Is it normal to have a value of 4 to 9 g/tons of Au in CIL Tails? The plant has BIOX process and the ore sample is mineralized as sulfur sulfides-molybdenum. Which part of the process has problem since CIL Tails is considered to have low Au.
Is it normal to have a value of 4 to 9 g/tons of Au in CIL Tails? The plant has BIOX process and the ore sample is mineralized as sulfur sulfides-molybdenum. Which part of the process has problem since CIL Tails is considered to have low Au.
3
REPLIES
1460
VIEWS
Started by NOBRAINER
I had gold ore tailing which had been mercury amalgamated assay at 2-5g. I had do a leaching test and in the first 2 hours the recovery reach 90% and 12hrs at 75% and 24hrs at 64% and finally 52% @ 48hrs. The FCN is maintain at 1000ppm. The carbon co...
I had gold ore tailing which had been mercury amalgamated assay at 2-5g. I had do a leaching test and in the first 2 hours the recovery reach 90% and 12hrs at 75% and 24hrs at 64% and finally 52% @ 48hrs. The FCN is maintain at 1000ppm. The carbon co...
Last commented on by benmuntean
Try to wash the ore and after that make again RollingBottle test
Try to wash the ore and after that make again RollingBottle test
1
REPLY
1596
VIEWS
Started by mebrahtu
could you please offer me any idea,suggestion or any exprence with the similar problem before. as usual operation we take 2 samples, one from cil tank3 and the other from harvested loaded carbon from cil3 at at the same time but the result is diff...
could you please offer me any idea,suggestion or any exprence with the similar problem before. as usual operation we take 2 samples, one from cil tank3 and the other from harvested loaded carbon from cil3 at at the same time but the result is diff...
Last commented on by benmuntean
Hi all, You have good point of view. But question is, which type transfer pumps are used? Mebrathu, try to take a sample with airlift pumps, scale manufacture. in different points of the tanks.and dif...
Hi all, You have good point of view. But question is, which type transfer pumps are used? Mebrathu, try to take a sample with airlift pumps, scale manufacture. in different points of the tanks.and dif...
1
REPLY
1845
VIEWS
Started by alaz
hello everyone i am an operator in gold plant and i would like to ask some question and i hope i will find the answers for it: our CIL tanks are 3000 m3 1- what is exactly the O2 does in CIL circuit 2- why is the total cyanide available ...
hello everyone i am an operator in gold plant and i would like to ask some question and i hope i will find the answers for it: our CIL tanks are 3000 m3 1- what is exactly the O2 does in CIL circuit 2- why is the total cyanide available ...
Last commented on by benmuntean
Hi Alaz and Richard, My experience, best recovery of gold and silver have when level of oxygen is over 8 ppm. In standard operation with out any interference. Very clearly you can see in lab when you...
Hi Alaz and Richard, My experience, best recovery of gold and silver have when level of oxygen is over 8 ppm. In standard operation with out any interference. Very clearly you can see in lab when you...
2
REPLIES
1508
VIEWS
Started by kahonde
i have a heap and i want to cyanide leach it for gold, i want to ask how long do you irrigate the heap before you send the pregnant solution for adsorption.
i have a heap and i want to cyanide leach it for gold, i want to ask how long do you irrigate the heap before you send the pregnant solution for adsorption.
Last replied to by Samuel Trindade
The heap leaching works irrigating it with cianide solution. The solution flows through the heap and feed a pregnant solution tank than goes to adsoption on activate carbon. The solution after adsorpt...
The heap leaching works irrigating it with cianide solution. The solution flows through the heap and feed a pregnant solution tank than goes to adsoption on activate carbon. The solution after adsorpt...
2
REPLIES
1693
VIEWS
Started by priya
to produce vanadium pentoxide from sludge by ammonia leaching method, can anyone please make this process more clear in respect of metallurgy and certain methods for increasing yield of vanadium pentoxide, removing unwanted trace elements like sulphu...
to produce vanadium pentoxide from sludge by ammonia leaching method, can anyone please make this process more clear in respect of metallurgy and certain methods for increasing yield of vanadium pentoxide, removing unwanted trace elements like sulphu...
1
REPLY
1822
VIEWS
Started by Ahmed Zaky
Hello i want to use zinc for gold recovery from leaching solution where i use vat leach method , what is zinc shavings and how can i use it ( picture of zinc shaving if it is available)
Hello i want to use zinc for gold recovery from leaching solution where i use vat leach method , what is zinc shavings and how can i use it ( picture of zinc shaving if it is available)
Last commented on by Ahmed Zaky
thanks for reply but how i can remove DO from solution and please show me how zinc powder is used either by passing solution on zinc as active carbon in cells or by stirring zinc powder directly wit...
thanks for reply but how i can remove DO from solution and please show me how zinc powder is used either by passing solution on zinc as active carbon in cells or by stirring zinc powder directly wit...
2
REPLIES
1365
VIEWS
Started by Tesaygo
I have a lot of source of copper-gold ore, but my problem is am only knowledgeable on mercury process to get the gold and simple cyanidation technique. Ive already try to leach copper-gold ore, but it seems that the consumption of NaCN is too much th...
I have a lot of source of copper-gold ore, but my problem is am only knowledgeable on mercury process to get the gold and simple cyanidation technique. Ive already try to leach copper-gold ore, but it seems that the consumption of NaCN is too much th...
Last replied to by Mikhail
In order to help you, you need to know how much copper and gold in the original ore? How do you process the ore? Agitation or heap leaching? Phase analysis for copper and gold. Based on this data, I c...
In order to help you, you need to know how much copper and gold in the original ore? How do you process the ore? Agitation or heap leaching? Phase analysis for copper and gold. Based on this data, I c...
1
REPLY
1457
VIEWS
Started by Alex Loutou
Dear Mets Expert, What is the optimum pH in MC process, is the ratio of gold-silver affect in the MC process? Thak you.
Dear Mets Expert, What is the optimum pH in MC process, is the ratio of gold-silver affect in the MC process? Thak you.
Last commented on by Alex Loutou
Thanks for your explanation Richard, its helpful. The pH even up to 11.6 because using lime to improve clarity in CCD beside lime in hpper clarifier. Rather hard to maintain pH at level 11.2 as long a...
Thanks for your explanation Richard, its helpful. The pH even up to 11.6 because using lime to improve clarity in CCD beside lime in hpper clarifier. Rather hard to maintain pH at level 11.2 as long a...
1
REPLY
1140
VIEWS
Started by cleo
we currently run a pressure zadra elution circuit. our GIC stocks (tanks stocks only) have been steadily increasing as a function of increased head grade. if I were to install a second parallel elution circuit, I would be able to maintain a lower GIC...
we currently run a pressure zadra elution circuit. our GIC stocks (tanks stocks only) have been steadily increasing as a function of increased head grade. if I were to install a second parallel elution circuit, I would be able to maintain a lower GIC...
1
REPLY
1612
VIEWS
Started by johncramos
Please I´m working in copper leaching project in a laboratory from Peru, and need some information about determination of free acid in the presence of hydrolysable cations by titration. In the test I use Fe(III) ions like catalyzador. please i wait ...
Please I´m working in copper leaching project in a laboratory from Peru, and need some information about determination of free acid in the presence of hydrolysable cations by titration. In the test I use Fe(III) ions like catalyzador. please i wait ...
Last replied to by David
Free Acid Titration Procedure Fill burette with NaOH (0.20 N) * Place 50ml distilled H2O in beaker While stirring add 5ml sample to be tested Add KI until solution turns clear red Add 200g/l Na...
Free Acid Titration Procedure Fill burette with NaOH (0.20 N) * Place 50ml distilled H2O in beaker While stirring add 5ml sample to be tested Add KI until solution turns clear red Add 200g/l Na...
1
REPLY
1699
VIEWS
Started by COPM Kisadag
It has long been known that using galvanized metal in cyanide circuits should be avoided due to the tendency of the zinc to dissolve and precipitate gold. I am looking for links to articles on the subject that can be used to educate tradespersons an...
It has long been known that using galvanized metal in cyanide circuits should be avoided due to the tendency of the zinc to dissolve and precipitate gold. I am looking for links to articles on the subject that can be used to educate tradespersons an...
Last commented on by COPM Kisadag
Thanks Jorge.
Thanks Jorge.
1
REPLY
1240
VIEWS
Started by ely.thar
When leaching coal fly ash using sulfuric acid, is it possible to leach iron instead of REE elements, if so how can we selectively leach the REE instead of the iron elements?
When leaching coal fly ash using sulfuric acid, is it possible to leach iron instead of REE elements, if so how can we selectively leach the REE instead of the iron elements?
1
REPLY
1152
VIEWS
Started by biteyaboy
I want to leach concentrate that has been upgraded by shacking table and mercury has been used to extract gold in the same Conc. I have this concentrate now i want to leach them in Acacia plant with Leach Aid, NaCN and maintain PH of 12. Then after s...
I want to leach concentrate that has been upgraded by shacking table and mercury has been used to extract gold in the same Conc. I have this concentrate now i want to leach them in Acacia plant with Leach Aid, NaCN and maintain PH of 12. Then after s...
Last replied to by David
Hi, see https://www.911metallurgist.com/hydrometallurgy/leaching-of-gold-ore-containing-mercury/
Hi, see https://www.911metallurgist.com/hydrometallurgy/leaching-of-gold-ore-containing-mercury/
Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extractionhttps://www.911metallur...
2
REPLIES
1210
VIEWS
Started by omer.canieren
I'm a Phd student at mineral processing department. And I'm trying to find a new topic on encountered problems in gold extraction process. Did anyone of you advice me? What is the biggest problem in this regard? Thank you for your interest. Rega...
I'm a Phd student at mineral processing department. And I'm trying to find a new topic on encountered problems in gold extraction process. Did anyone of you advice me? What is the biggest problem in this regard? Thank you for your interest. Rega...
4
REPLIES
1621
VIEWS
Started by omer.canieren
Hello everyone, Did anyone of you use the chloride as solvent in order to extract gold from the oxide and sulphide bearing gold minerals? Thanks for your intrest. Regards.
Hello everyone, Did anyone of you use the chloride as solvent in order to extract gold from the oxide and sulphide bearing gold minerals? Thanks for your intrest. Regards.
3
REPLIES
1808
VIEWS
Started by kudzisa
Which ion exchange resin is the best for processing gold rich solution from a heap leaching process of oxide rich Banded Iron Formation.
Which ion exchange resin is the best for processing gold rich solution from a heap leaching process of oxide rich Banded Iron Formation.
0
REPLIES
1216
VIEWS
Started by Rob.Earth.20
Hello,I tried to make thermite reaction with crushed manganese oxide ore, so the manganese oxide could become a pure manganese without oxide. I want to ask if I could separate the pure manganese from the aluminium? Can I dissolving the aluminium oxid...
Hello,I tried to make thermite reaction with crushed manganese oxide ore, so the manganese oxide could become a pure manganese without oxide. I want to ask if I could separate the pure manganese from the aluminium? Can I dissolving the aluminium oxid...
5
REPLIES
3189
VIEWS
Started by Irene Ibz
Hello, I work in a plant where there are a lot of carbon losses of about 7 to 9 tonnes per month.. Now I have been given a project to minimize the carbon losses and of course I know carbon is lost due to attrition losses in the agitators, kiln, due ...
Hello, I work in a plant where there are a lot of carbon losses of about 7 to 9 tonnes per month.. Now I have been given a project to minimize the carbon losses and of course I know carbon is lost due to attrition losses in the agitators, kiln, due ...
Last replied to by SIMetallurgist
Hi Irene, Some more things to try, attach a 20 mesh screen to a sampler and dip it in the launder of your last CIP or CIL discharge going to tails. This will show if you have carbon losses coming out...
Hi Irene, Some more things to try, attach a 20 mesh screen to a sampler and dip it in the launder of your last CIP or CIL discharge going to tails. This will show if you have carbon losses coming out...
1
REPLY
1509
VIEWS
Started by nyala89
I hope somebody on the group can help me. I'm looking for learning material in carbon management. I'm developing a course in carbon especially carbon in pulp and carbon in leach. i'm in need for assessments as well as learner guides. Please if so...
I hope somebody on the group can help me. I'm looking for learning material in carbon management. I'm developing a course in carbon especially carbon in pulp and carbon in leach. i'm in need for assessments as well as learner guides. Please if so...
2
REPLIES
1519
VIEWS
Started by nicolas
hello, i operate a gravity vat leach plant, i treat tailings from artisanal workers after recovery of free gold. I got twelve 30 tons tanks. As tails are argillaceous, i melt 15kg/ton cement to pelletize the tails . What flow rate do i need in tank ...
hello, i operate a gravity vat leach plant, i treat tailings from artisanal workers after recovery of free gold. I got twelve 30 tons tanks. As tails are argillaceous, i melt 15kg/ton cement to pelletize the tails . What flow rate do i need in tank ...
1
REPLY
1520
VIEWS
Started by Fabian Rebolledo
i would like to know if someone knows about technologies that can measure the organic entrainment in copper solvent extraction without lab tests.
i would like to know if someone knows about technologies that can measure the organic entrainment in copper solvent extraction without lab tests.
Last replied to by David
Typically two ways, most common is a dairy centrifuge tester see link of typical unit; https://www.indiamart.com/dairy-instruments/# Also used in a Horiba IR tester that uses infrared and special so...
Typically two ways, most common is a dairy centrifuge tester see link of typical unit; https://www.indiamart.com/dairy-instruments/# Also used in a Horiba IR tester that uses infrared and special so...
1
REPLY
1941
VIEWS
Started by Sandeep Bisht
Over a week and a half, the dissolved oxygen content of my flotation concentrate carbon-in-leach tank drops by 80% to around 5 ppm. My gold recovery is still OK at almost 90%. This is a batch/Vat setup. What could explain the oxygen being consu...
Over a week and a half, the dissolved oxygen content of my flotation concentrate carbon-in-leach tank drops by 80% to around 5 ppm. My gold recovery is still OK at almost 90%. This is a batch/Vat setup. What could explain the oxygen being consu...
Last replied to by Charlie
Hi Sandeep, I saw something similar discussed elsewhere and here is what they say: Susan (Sue) Ritz This sounds like a mechanical problem to me. Do you inject directly into the tank or do you have a...
Hi Sandeep, I saw something similar discussed elsewhere and here is what they say: Susan (Sue) Ritz This sounds like a mechanical problem to me. Do you inject directly into the tank or do you have a...
8
REPLIES
1424
VIEWS
Started by SDHILLBILLY
I have been experimenting with direct smelting and sulfuric acid leaching/electrowinning of oxide copper/silver ores on my property. My great grand father used direct smelt 150 tons per day. I Would like to setup a pilot process of 4 to 8 tons per da...
I have been experimenting with direct smelting and sulfuric acid leaching/electrowinning of oxide copper/silver ores on my property. My great grand father used direct smelt 150 tons per day. I Would like to setup a pilot process of 4 to 8 tons per da...
Last replied to by David
Some processing ideas: https://www.911metallurgist.com/blog/heap-leaching see the last 3 PDFs at bottom https://www.911metallurgist.com/blog/agitated-copper-leaching-ore https://www.911metallurgist...
Some processing ideas: https://www.911metallurgist.com/blog/heap-leaching see the last 3 PDFs at bottom https://www.911metallurgist.com/blog/agitated-copper-leaching-ore https://www.911metallurgist...
Please join and login to participate and leave a comment.
I mean adsorption time