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1402
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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
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1163
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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
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1489
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...
6
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1326
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Started by Ching Chong
We have a heap that we are planning to leach. The heap contains silver bearing ore. The pH of the heap is at pH 3. we want to raise the pH to 11 before we start to add cyanide to leach the silver. What is the best possible chemical to use?
We have a heap that we are planning to leach. The heap contains silver bearing ore. The pH of the heap is at pH 3. we want to raise the pH to 11 before we start to add cyanide to leach the silver. What is the best possible chemical to use?
2
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1045
VIEWS
Started by bryan randolph
Hello members, My name is Bryan, I am Colorado and my buddy and I are trying to start our own little weekend mining until we get sufficient enough and make enough for a living. We are only interested in gold then maybe a little bit of silver...
Hello members, My name is Bryan, I am Colorado and my buddy and I are trying to start our own little weekend mining until we get sufficient enough and make enough for a living. We are only interested in gold then maybe a little bit of silver...
1
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1182
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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?
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1294
VIEWS
Started by Ahmed Zaky
Hello , I want to make stripping but i want details about ( optimum CN and NaOH concentration and also alchole , temperature ) and which is better ? heating stripping solution with carbon directly or circulate solution through carbon, ratio of carbon...
Hello , I want to make stripping but i want details about ( optimum CN and NaOH concentration and also alchole , temperature ) and which is better ? heating stripping solution with carbon directly or circulate solution through carbon, ratio of carbon...
4
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925
VIEWS
Started by Adimulu
We had cyanide spill on the ground soil containing free cyanide of 10ppm. Could you help me what type of chemical do i have to use e.g hypochlorde..or any other chemical to kill the cyanide,excavation is impossible.
We had cyanide spill on the ground soil containing free cyanide of 10ppm. Could you help me what type of chemical do i have to use e.g hypochlorde..or any other chemical to kill the cyanide,excavation is impossible.
1
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1067
VIEWS
Started by MarsV
are these methods (https://www.911metallurgist.com/blog/procedure-method-activated-carbon-testing-program) still being used today as procedures for testing activated carbon?
are these methods (https://www.911metallurgist.com/blog/procedure-method-activated-carbon-testing-program) still being used today as procedures for testing activated carbon?
2
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2047
VIEWS
Started by KRISHNADAS
Hi We are planning a VAT leaching for HMS rejects of copper oxide ore. We are stuck at design and would value inputs. We are planning for a 5000 tons holding capacity for the VAT and feed grade is 1% copper. Size of feed 100% passing 20 mm. Would the...
Hi We are planning a VAT leaching for HMS rejects of copper oxide ore. We are stuck at design and would value inputs. We are planning for a 5000 tons holding capacity for the VAT and feed grade is 1% copper. Size of feed 100% passing 20 mm. Would the...
Last commented on by KRISHNADAS
Thanks
Thanks
1
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1934
VIEWS
Started by hulk
Hi! How are you? I need to optimise my carbon concentration profile. How to estimate a optimum carbon transfer time in CIL circuit if i don't know my transfer pumps flow? Thanks
Hi! How are you? I need to optimise my carbon concentration profile. How to estimate a optimum carbon transfer time in CIL circuit if i don't know my transfer pumps flow? Thanks
Last replied to by David
Hulk, for now review:
Hulk, for now review:
Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extractionhttps://www.911metallurgist.com/blog/gold-circuit-carbon-sampling-inventory-movement https://www.911met...
3
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1286
VIEWS
Started by Charlie
We are experiencing an unusual issue at our plant. Firstly the Merrill Crowe is still not recovering. The solid in the leach tank are very unusual. Leach tank 1-4 the grades are 1-1.5 g/t but in leach tank (the last) 5 it is 26 g/t. We believe that t...
We are experiencing an unusual issue at our plant. Firstly the Merrill Crowe is still not recovering. The solid in the leach tank are very unusual. Leach tank 1-4 the grades are 1-1.5 g/t but in leach tank (the last) 5 it is 26 g/t. We believe that t...
Last replied to by Charlie
Sorry for the late reply. We have turned the plant off and have flushed out the entire plant. We believe it was carbon in the plant that have caused the issue. Only yesterday were we able to turn the ...
Sorry for the late reply. We have turned the plant off and have flushed out the entire plant. We believe it was carbon in the plant that have caused the issue. Only yesterday were we able to turn the ...
2
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1341
VIEWS
Started by Plamen Georgiev
Dear colleagues, please give me any recommendation or suggestions about suitable laboratory filter press for processing of pregnant leach pulp generated during bacterial leaching of final copper slags in a bioreactor. We need to use this equipment...
Dear colleagues, please give me any recommendation or suggestions about suitable laboratory filter press for processing of pregnant leach pulp generated during bacterial leaching of final copper slags in a bioreactor. We need to use this equipment...
Last replied to by Plamen Georgiev
David, thank you for the share link!
David, thank you for the share link!
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1130
VIEWS
Started by max skinner
I am looking for a ion exchange resin that will pull zinc out of a 15% sulfuric acid solution.
I am looking for a ion exchange resin that will pull zinc out of a 15% sulfuric acid solution.
Last replied to by David
Hi Max, my SX expert friend says "Why use a resin, conventional SX for zinc should work…high acid content though". PDF attached.
Hi Max, my SX expert friend says "Why use a resin, conventional SX for zinc should work…high acid content though". PDF attached.
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1223
VIEWS
Started by McPaul
Hie l am a student in metallurgy and l want to do a project on agglomeration of vat leach ore using cement and lime. can l please have help with experimental procedures that l can use.
Hie l am a student in metallurgy and l want to do a project on agglomeration of vat leach ore using cement and lime. can l please have help with experimental procedures that l can use.
Last replied to by David
Here is a study a friend prepared (2 PDFs attached). It may be useful to you. Page 49 of the Thesis. Experimental Procedure: A plastic drum mixer (cement mixer) that rotates at 20 RPM and with 5 deg...
Here is a study a friend prepared (2 PDFs attached). It may be useful to you. Page 49 of the Thesis. Experimental Procedure: A plastic drum mixer (cement mixer) that rotates at 20 RPM and with 5 deg...
1
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1066
VIEWS
Started by Cindy ccindie1994
hello I am doing a project on the effectiveness of bottle rolling cyanidation method for low grade samples over the Fire Assaying method. So I would like to ask how well can I carry out the bottle rolling test works,the methodology and proportions...
hello I am doing a project on the effectiveness of bottle rolling cyanidation method for low grade samples over the Fire Assaying method. So I would like to ask how well can I carry out the bottle rolling test works,the methodology and proportions...
4
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1125
VIEWS
Started by M.H
Hello everybody. Does anyone have ideas about formation of lumps in the copper heap leaching?
Hello everybody. Does anyone have ideas about formation of lumps in the copper heap leaching?
1
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995
VIEWS
Started by GonDamm
In the topic labelled "Solvent Extraction Plants: Thiele Diagram & Theoretical Design Aspects" it is mentioned that a computer program (software) has been developed by I.C.I./Acorga to perform iterations for obtaining desired raffinate levels and st...
In the topic labelled "Solvent Extraction Plants: Thiele Diagram & Theoretical Design Aspects" it is mentioned that a computer program (software) has been developed by I.C.I./Acorga to perform iterations for obtaining desired raffinate levels and st...
0
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915
VIEWS
Started by Youssef ETTAAJ
which is the most expensive of those : zinc metal or the zinc oxide powder? when i searched on the net i found its price much close? if there price so close why we use the hydromettalurgic process after pyrometallurgy to extract zinc from zinc oxyd...
which is the most expensive of those : zinc metal or the zinc oxide powder? when i searched on the net i found its price much close? if there price so close why we use the hydromettalurgic process after pyrometallurgy to extract zinc from zinc oxyd...
2
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940
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
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1220
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
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1142
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
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1113
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
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1525
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
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1186
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
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1375
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
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1496
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
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937
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
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1130
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...
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819
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
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1285
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...
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R.. Hello, hope you can help. I have never done this. I am using sod. cyan. in 5 gallon buckets, reuse solution. I have have a lot of sulfur and arsenic and micro. I ground pulp fine. I do not table t...