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Started by Austin Muvimi
Anyone with the knowledge of cold caustic cyanide carbon soak prior to elution for removing copper?What are the quantities for caustic soda, cyanide and water and how long should be the soak?I have 600kg carbon and copper load is 1.8%.I use zadra elu...
Anyone with the knowledge of cold caustic cyanide carbon soak prior to elution for removing copper?What are the quantities for caustic soda, cyanide and water and how long should be the soak?I have 600kg carbon and copper load is 1.8%.I use zadra elu...
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1306
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Started by Okay
Hello everyone, For the heap leaching of oxide abrasive ore without clay particles, I could not reach any information about crushed ore size estimation. So,what should be the crushed ore size to feed to the heap leaching ? Could you please also give...
Hello everyone, For the heap leaching of oxide abrasive ore without clay particles, I could not reach any information about crushed ore size estimation. So,what should be the crushed ore size to feed to the heap leaching ? Could you please also give...
Last replied to by brendan.fetter
Vat leaching by various sizes will also help with determining the optimal p80 for the material. This coupled with column testing and hydrodynamic testing can show the optimal application rates couple...
Vat leaching by various sizes will also help with determining the optimal p80 for the material. This coupled with column testing and hydrodynamic testing can show the optimal application rates couple...
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1647
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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?
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2501
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Started by Samuel Trindade
Hello gents, If the increase in cyanide concentration causes the Au(CN)2 breaking equation to be shifted to the more cathodic side (increasing the cell voltage), why do I need an initial concentration of 1% NaCN in electrolyzing solution? I know th...
Hello gents, If the increase in cyanide concentration causes the Au(CN)2 breaking equation to be shifted to the more cathodic side (increasing the cell voltage), why do I need an initial concentration of 1% NaCN in electrolyzing solution? I know th...
Last replied to by Sachin Prakash
ALCOHOL STRIPPING Further research at the USBM showed that the atmospheric pressure Zadra stripping cycle can be made to operate much faster by the addition of alcohol to the strip solution (6). Fi...
ALCOHOL STRIPPING Further research at the USBM showed that the atmospheric pressure Zadra stripping cycle can be made to operate much faster by the addition of alcohol to the strip solution (6). Fi...
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1549
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Started by babygenius76
Has anyone looked into this issue? I have heard about adding sodium hydrosulphite is added to an acidic slurry of talc and diluted sulfuric acid. I am concerned about the safety of anything related to sodium hydosulphite. Any suggestions?
Has anyone looked into this issue? I have heard about adding sodium hydrosulphite is added to an acidic slurry of talc and diluted sulfuric acid. I am concerned about the safety of anything related to sodium hydosulphite. Any suggestions?
2
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1367
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Started by Nikolay
Hello members, here is the tricky question. So I'm getting by gravity (shaking table etc) monazite concentrate with 20-30% TREO and 5-10 g/t Au. Particles size is about -0,5+0,05 mm. It is very convenient to get only one collective concentrate becaus...
Hello members, here is the tricky question. So I'm getting by gravity (shaking table etc) monazite concentrate with 20-30% TREO and 5-10 g/t Au. Particles size is about -0,5+0,05 mm. It is very convenient to get only one collective concentrate becaus...
2
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1350
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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...
3
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1535
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Started by Adrian Hall
Hi everyone, I have 200 tonnes of ore that is preg robbing. The free gold is approx 30% and the preg robbed gold approx 60%. The remaining 10% is slow leaching preg robbed and locked in either sulphides or silicates. I had diagnostic leaching t...
Hi everyone, I have 200 tonnes of ore that is preg robbing. The free gold is approx 30% and the preg robbed gold approx 60%. The remaining 10% is slow leaching preg robbed and locked in either sulphides or silicates. I had diagnostic leaching t...
Last commented on by Adrian Hall
Hi Richard, This material came from cleanup from a mill. The grade is coming from loaded carbon. The oxide ore was probably a few g/t. However this goes 60 g/t. Several prospectors have tried to...
Hi Richard, This material came from cleanup from a mill. The grade is coming from loaded carbon. The oxide ore was probably a few g/t. However this goes 60 g/t. Several prospectors have tried to...
7
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1894
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Started by Stibnut
Hi all, I am a student in atmospheric chemistry who has developed a side interest in chemistry overall. Then I ended up doing metallurgy and found it quite interesting. It's time for something ambitious. And dangerous, I know, but I hope to persuade...
Hi all, I am a student in atmospheric chemistry who has developed a side interest in chemistry overall. Then I ended up doing metallurgy and found it quite interesting. It's time for something ambitious. And dangerous, I know, but I hope to persuade...
3
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1382
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Started by bryan randolph
Hello all I am an amature gold and rock hound, my buddy and I went in together and bought a gold dore bar and we are having problems trying to dissolve it out. I have been told to use nitric acid and I did some but I am scared because I dont...
Hello all I am an amature gold and rock hound, my buddy and I went in together and bought a gold dore bar and we are having problems trying to dissolve it out. I have been told to use nitric acid and I did some but I am scared because I dont...
Effect of blinding agents on gold leaching kinetics from gold ores containing carbonaceous materials
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1326
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Started by GuoHaiGHsolutions88
I am looking for some testing data on effect of blinding agents on gold leaching kinetics from gold ores containing carbonaceous materials. Any data or comments are highly appreciated. Many thanks.
I am looking for some testing data on effect of blinding agents on gold leaching kinetics from gold ores containing carbonaceous materials. Any data or comments are highly appreciated. Many thanks.
Last replied to by GuoHaiGHsolutions88
They are my blinding agents, I would like to know if adding of these blinding agents will slow down the leaching kinetics of gold and to what extent
They are my blinding agents, I would like to know if adding of these blinding agents will slow down the leaching kinetics of gold and to what extent
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Started by martie
Hello there. I know lead nitrate offers some benefits in gold leaching. However, is there a downside to dosing it in a CIP plant? Any impact on adsorption?
Hello there. I know lead nitrate offers some benefits in gold leaching. However, is there a downside to dosing it in a CIP plant? Any impact on adsorption?
Last replied to by David
For your review: https://rsteyn.files.wordpress.com/2010/07/leaching-adsorption-basics-and-example.pdf https://www.911metallurgist.com/hydrometallurgy/effect-of-lead-nitrate-on-gold-leach-kinetics/ ...
For your review: https://rsteyn.files.wordpress.com/2010/07/leaching-adsorption-basics-and-example.pdf https://www.911metallurgist.com/hydrometallurgy/effect-of-lead-nitrate-on-gold-leach-kinetics/ ...
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1262
VIEWS
Started by Ahmed Zaky
hello , which is the best in gold stripping from active carbon heating active carbon directly with cyanide solution or passing solution through carbon with certain bed volume or two ways give the same result thank you
hello , which is the best in gold stripping from active carbon heating active carbon directly with cyanide solution or passing solution through carbon with certain bed volume or two ways give the same result thank you
Last replied to by David
Ahmed, maybe you are not getting an answer because we can not understand your question. Can you please clarify your situation.
Ahmed, maybe you are not getting an answer because we can not understand your question. Can you please clarify your situation.
2
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1243
VIEWS
Started by sherafat71
What are the methods for removing chlorine from zinc sulfate solution?Techniques such as high heat and water washing can help remove chlorine, but what other methods are available to remove chlorine from a zinc sulfate solution?Thank you
What are the methods for removing chlorine from zinc sulfate solution?Techniques such as high heat and water washing can help remove chlorine, but what other methods are available to remove chlorine from a zinc sulfate solution?Thank you
Last replied to by sherafat71
Thanks for your answer to produce solution for electrolysis, we have a problem that is high-chlorine calcine .this problem is not solved by hot-water washing methods or addition of salts and even t...
Thanks for your answer to produce solution for electrolysis, we have a problem that is high-chlorine calcine .this problem is not solved by hot-water washing methods or addition of salts and even t...
2
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1411
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Started by Siddiquf
Are there any companies who specialize in supplying equipment and flow sheet for sulfuric acid leach of oxide ore and copper cementation, both in batch and continuous operating modes? What kind of iron/steel scrap is best for copper cementation? What...
Are there any companies who specialize in supplying equipment and flow sheet for sulfuric acid leach of oxide ore and copper cementation, both in batch and continuous operating modes? What kind of iron/steel scrap is best for copper cementation? What...
2
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1160
VIEWS
Started by Fachrifaa
Hello everyone, I was doing some lab testwork to reduce copper concentration at pregnant leach solution after cyanidation leaching using SART ( Sulphidization-Acidification-Recycling-Thickening) method, and found out that the gold also precipitated u...
Hello everyone, I was doing some lab testwork to reduce copper concentration at pregnant leach solution after cyanidation leaching using SART ( Sulphidization-Acidification-Recycling-Thickening) method, and found out that the gold also precipitated u...
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1190
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Started by LenjeLeonheart
I was wondering what solvent extraction method you all would believe to be the most cost effective for a small scale refining op, and the steps you would recommend taking for said method? I'm starting from ore. Thank you for your time, Bradford
I was wondering what solvent extraction method you all would believe to be the most cost effective for a small scale refining op, and the steps you would recommend taking for said method? I'm starting from ore. Thank you for your time, Bradford
Last commented on by LenjeLeonheart
I'm trying to use a precipitation process to get the precious metals out of the ore, as opposed to just crushed- panning or smelting it
I'm trying to use a precipitation process to get the precious metals out of the ore, as opposed to just crushed- panning or smelting it
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1602
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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...
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VIEWS
Started by bryan randolph
Hello All, I need a little help well more of an answer I guess, so I have gold ore that I have crushed, I have classified it all down from 30 mesh to 100 mesh. My question is can I use the aqua regia mixture of 3:1 with the entire sample of ...
Hello All, I need a little help well more of an answer I guess, so I have gold ore that I have crushed, I have classified it all down from 30 mesh to 100 mesh. My question is can I use the aqua regia mixture of 3:1 with the entire sample of ...
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1250
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Started by John KK
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.
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1386
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?
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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
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2257
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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...
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1592
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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 ...
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1656
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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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1457
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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1530
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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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1376
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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...
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1456
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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?
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1301
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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...
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1221
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...
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