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Started by Alex
We are currently setting up an Alluvial Gold Wash Plant - (Hopper bin - Vibrating Feeder - Trommel Scrubber - Sluice Box - Vibrating Screen (2mm) - Falcon Concentrator) We want to process the 75 tons per hour. The clay content is high. And the mat...
We are currently setting up an Alluvial Gold Wash Plant - (Hopper bin - Vibrating Feeder - Trommel Scrubber - Sluice Box - Vibrating Screen (2mm) - Falcon Concentrator) We want to process the 75 tons per hour. The clay content is high. And the mat...
8
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3733
VIEWS
Started by Bob Mathias
When it comes to very fine gold recovery in alluvial operations where throughput volume and continuity are very important, what are the top priorities to consider?How important are say Corey factors, make up of host gravel/sands, gold finesse, clear ...
When it comes to very fine gold recovery in alluvial operations where throughput volume and continuity are very important, what are the top priorities to consider?How important are say Corey factors, make up of host gravel/sands, gold finesse, clear ...
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2640
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Started by terrence
i am using spirals to recover chrome fines size (-1mm) to (+100microns) from ore. l have noticed a high grade and reasonable amount of values in the tailings and after size analysis a majority of these fines are in the range of (-75microns). How can ...
i am using spirals to recover chrome fines size (-1mm) to (+100microns) from ore. l have noticed a high grade and reasonable amount of values in the tailings and after size analysis a majority of these fines are in the range of (-75microns). How can ...
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1144
VIEWS
Started by Anupam
Can you explain recovery and recovery rates? Say I am jigging mineral, I get a 60% recovery rate. feed specific gravity is 3.8, final product gravity is 4.2. If I lower my recovery rate to 50%, what will happen? maintain final specific gravity, b...
Can you explain recovery and recovery rates? Say I am jigging mineral, I get a 60% recovery rate. feed specific gravity is 3.8, final product gravity is 4.2. If I lower my recovery rate to 50%, what will happen? maintain final specific gravity, b...
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1353
VIEWS
Started by vekian
We have 2 discharge pipes from the cyclone underflow. 1 is a smaller diameter pipe going to gravity/scalping screens which then classify the product. Oversize from these screens report to mill discharge hopper. Undersize reports to gravity concentrat...
We have 2 discharge pipes from the cyclone underflow. 1 is a smaller diameter pipe going to gravity/scalping screens which then classify the product. Oversize from these screens report to mill discharge hopper. Undersize reports to gravity concentrat...
Last replied to by KRISHNADAS
We had a setup in one of our gold plants, where complete cyclone underflow goes to a 1 mm screen, the screen underflow goes to the concentrator, while screen overflow is pumped back to the ball mill. ...
We had a setup in one of our gold plants, where complete cyclone underflow goes to a 1 mm screen, the screen underflow goes to the concentrator, while screen overflow is pumped back to the ball mill. ...
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1112
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Started by Ausmet71
I am looking into a project that has substantial waste stockpiles expected to have moderate concentrations of Nickel, Copper, Ag and Cobalt. They are mostly interested in the Nickel/Cobalt and more than likely not looking to make final metal/cathode...
I am looking into a project that has substantial waste stockpiles expected to have moderate concentrations of Nickel, Copper, Ag and Cobalt. They are mostly interested in the Nickel/Cobalt and more than likely not looking to make final metal/cathode...
Last replied to by KRISHNADAS
HI We had treated copper sulphide ores in DMS and was successfull. Could you send a particle size distribution of the ore , with metal concentrations in each size. This would enable us to predict th...
HI We had treated copper sulphide ores in DMS and was successfull. Could you send a particle size distribution of the ore , with metal concentrations in each size. This would enable us to predict th...
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2107
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Started by GhanaBob
Hello Colleagues, I want to thank each of you who added great clarity to my previous question of mass vs density measurements. In a similar vein, how can ppm be a meaningful metric compared to g/m3? What does ppm in placer sampling really tell us th...
Hello Colleagues, I want to thank each of you who added great clarity to my previous question of mass vs density measurements. In a similar vein, how can ppm be a meaningful metric compared to g/m3? What does ppm in placer sampling really tell us th...
Last commented on by max skinner
Except in the USA, but that is changing.
Except in the USA, but that is changing.
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1054
VIEWS
Started by Sam
This is an old school method I am trying to learn more about. Froth floatation on a shaker table. I don't mean done separately. Does anyone know anything about it? It was mentioned in a set of operating instructions for an RP-4 Shaker Table but not e...
This is an old school method I am trying to learn more about. Froth floatation on a shaker table. I don't mean done separately. Does anyone know anything about it? It was mentioned in a set of operating instructions for an RP-4 Shaker Table but not e...
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3261
VIEWS
Started by NAVEEN VARMA B
Myself mineral processing engineer and am working on flow sheet development.... Am getting problem with maintaining circulating load in spiral concentrator circuit (rougher, scavenger & cleaner) followed by hydro cyclone? As we are giving hydro cyclo...
Myself mineral processing engineer and am working on flow sheet development.... Am getting problem with maintaining circulating load in spiral concentrator circuit (rougher, scavenger & cleaner) followed by hydro cyclone? As we are giving hydro cyclo...
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928
VIEWS
Started by biteyaboy
I have knelson concentrate that capture free gold and same concentrate is upgrade into shacking table sometimes ready for Acacia process (Leaching and Electrowinning). Recently i got little bit high copper value of copper. Resuts are 1000 ppm of Au a...
I have knelson concentrate that capture free gold and same concentrate is upgrade into shacking table sometimes ready for Acacia process (Leaching and Electrowinning). Recently i got little bit high copper value of copper. Resuts are 1000 ppm of Au a...
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863
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Started by hadi
Dear All, Greetings from Iran and glad to be here among professionals. How to determine metal liberation size prior to jigging of Lead slag with 10% Pb content. Kindly advise if you have any idea.
Dear All, Greetings from Iran and glad to be here among professionals. How to determine metal liberation size prior to jigging of Lead slag with 10% Pb content. Kindly advise if you have any idea.
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1633
VIEWS
Started by Tariq
I ran 6.11% copper oxide on a shaking table optimised to process chromite ore, and got 10.60% in heading, and 4.28 in middling. Copper was milled at 100 plus mesh. There was no control and hence no optimisation. How much say 1% copper ore can be upg...
I ran 6.11% copper oxide on a shaking table optimised to process chromite ore, and got 10.60% in heading, and 4.28 in middling. Copper was milled at 100 plus mesh. There was no control and hence no optimisation. How much say 1% copper ore can be upg...
Last commented on by Treve Mildren
Yes 50g is sufficient but send a little more (100g) in case I need to retest.
Yes 50g is sufficient but send a little more (100g) in case I need to retest.
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2111
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Started by Sachin Prakash
Why were copper plates used historically for mercury amalgamation = rather than other metals? it's always copper. Thank you
Why were copper plates used historically for mercury amalgamation = rather than other metals? it's always copper. Thank you
Last replied to by Hauptsturm
Mercury is attracted to copper. The mercury is dispensed down a long copper table, which formed a thin coating of mercury on the whole table. This creates a mercury-wetted copper plate. The gold ore w...
Mercury is attracted to copper. The mercury is dispensed down a long copper table, which formed a thin coating of mercury on the whole table. This creates a mercury-wetted copper plate. The gold ore w...
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4359
VIEWS
Started by Alex
We are looking for an efficient Nugget Trap design. Alluvial Gold Wash Plant - 75 tons per hour. Anyone has a proofed efficient design? We found some on internet, but not sure if they are really effective.
We are looking for an efficient Nugget Trap design. Alluvial Gold Wash Plant - 75 tons per hour. Anyone has a proofed efficient design? We found some on internet, but not sure if they are really effective.
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3454
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Started by explorer64
We sent a substantial amount of quartz gold ore to a mill for processing. After a couple hundred tests on the material an average grade was calculated. After milling for several days the mill says there is way less gold in the ore than what had bee...
We sent a substantial amount of quartz gold ore to a mill for processing. After a couple hundred tests on the material an average grade was calculated. After milling for several days the mill says there is way less gold in the ore than what had bee...
Last replied to by David
Funny how Treve here posted photos of a Mozley Multi Gravity Separator to recover gold ... do you see the ball mill parallel?
Funny how Treve here posted photos of a Mozley Multi Gravity Separator to recover gold ... do you see the ball mill parallel?
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1464
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Started by Mr. Nanda kishore
if jigging can process galena ore, which information is necessary e.g mineralogy, feed size, feed, jigging machine type etc. ?
if jigging can process galena ore, which information is necessary e.g mineralogy, feed size, feed, jigging machine type etc. ?
Last replied to by David
Hello Mr. Nanda, unless this is a research project or you are under some serious environmental restrictions, you would not jig galena. Mr. Skinner is correct in saying flotation is the best galena re...
Hello Mr. Nanda, unless this is a research project or you are under some serious environmental restrictions, you would not jig galena. Mr. Skinner is correct in saying flotation is the best galena re...
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1882
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Started by Latricia Patton
We always come across some customers who want to concentrate the alluvial gold . And their alluvial gold is with some magnetic mineral,so some magnetic would stay with after gold centrifugal or jig separator . below is the flow offer by some suppl...
We always come across some customers who want to concentrate the alluvial gold . And their alluvial gold is with some magnetic mineral,so some magnetic would stay with after gold centrifugal or jig separator . below is the flow offer by some suppl...
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3894
VIEWS
Started by spaceexplorer
We are considering acquiring an iCON-i350 Centrifugal Concentrator ( http://www.iconcentrator.com ); a Falcon SB350 equivalent. However, we got an attractive offer of two units of “Oro Low-G 16” Horizontal Centrifuge Primary Concentrators” (use...
We are considering acquiring an iCON-i350 Centrifugal Concentrator ( http://www.iconcentrator.com ); a Falcon SB350 equivalent. However, we got an attractive offer of two units of “Oro Low-G 16” Horizontal Centrifuge Primary Concentrators” (use...
Last replied to by David
Yes, if you have no gold finer than 200 mesh (74um) you might be OK with that low-G machine. Otherwise.... you need high-G for better recovery of fine gold. Can you perform that type for test? Belo...
Yes, if you have no gold finer than 200 mesh (74um) you might be OK with that low-G machine. Otherwise.... you need high-G for better recovery of fine gold. Can you perform that type for test? Belo...
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2660
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Started by Olga
Hello colleagues! Does anybody has an experience with tube densifiers in a dense medium circuit? The picture of densifier is attached. What are the advantages? Is it possible to set up usual thickening hydrocyclones? What are the differences? Wh...
Hello colleagues! Does anybody has an experience with tube densifiers in a dense medium circuit? The picture of densifier is attached. What are the advantages? Is it possible to set up usual thickening hydrocyclones? What are the differences? Wh...
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1869
VIEWS
Started by Wattle01
Hi I'm currently working Placer gold a Quarts Conglomerate, I'm washing in a Trommel, 100 x 15 liter buckets ( soaked over night) in a day 5 days a month.... I have a limited amount of water. I'm wondering if I made a bigger Trommel to wash the 500...
Hi I'm currently working Placer gold a Quarts Conglomerate, I'm washing in a Trommel, 100 x 15 liter buckets ( soaked over night) in a day 5 days a month.... I have a limited amount of water. I'm wondering if I made a bigger Trommel to wash the 500...
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1578
VIEWS
Started by anjanisail
Dear All While preparing Flow Sheet for designing of a flow sheet for beneficiation of Hematite Iron Ore, I came across a Problem. I have considered Jig, Spiral Concentrator and WHIMS in my envisaged flow sheet. Based on the available test test resu...
Dear All While preparing Flow Sheet for designing of a flow sheet for beneficiation of Hematite Iron Ore, I came across a Problem. I have considered Jig, Spiral Concentrator and WHIMS in my envisaged flow sheet. Based on the available test test resu...
Last replied to by
AS YOU MUST KNOW, One of the biggest mistakes in designing a process flowsheet is designing for an "average" ore that will never actually be seen. If Pilot Plant work is done, a range of ores should b...
AS YOU MUST KNOW, One of the biggest mistakes in designing a process flowsheet is designing for an "average" ore that will never actually be seen. If Pilot Plant work is done, a range of ores should b...
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Started by Tarun Karakoti
We run a Gekko ILR to leach gravity gold. The problem we have is to estimate the Au recovered using Solution assays & tons from volume measurements. The variation is always approx. -30%. Where are we missing?
We run a Gekko ILR to leach gravity gold. The problem we have is to estimate the Au recovered using Solution assays & tons from volume measurements. The variation is always approx. -30%. Where are we missing?
Last replied to by Tarun Karakoti
What are the best automatic sample cutters for the solution streams?I think the problem with solution accountability has been identified. It was due to interference with Fe ions with the use of AAS di...
What are the best automatic sample cutters for the solution streams?I think the problem with solution accountability has been identified. It was due to interference with Fe ions with the use of AAS di...
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2059
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Started by Jean Rasczak
Could Gravity + Intensive Leach process the Gold in more cost effective manner? Some study in stopping the illegal miners using mercury claimed this opportunity too. Some junior miners samples of Indonesia, showing > 100 ppm Au in the GRG concent...
Could Gravity + Intensive Leach process the Gold in more cost effective manner? Some study in stopping the illegal miners using mercury claimed this opportunity too. Some junior miners samples of Indonesia, showing > 100 ppm Au in the GRG concent...
Last replied to by Hauptsturm
It is good to see you describe the research he has conducted concerning the use of glycine for leaching copper (1 paper) and for leaching gold and silver (2 papers). We look forward to their demonstra...
It is good to see you describe the research he has conducted concerning the use of glycine for leaching copper (1 paper) and for leaching gold and silver (2 papers). We look forward to their demonstra...
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1688
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Started by Marshal Meru
Within our concessions have abundant tailings (2% Hg and 10 oz Ag/TM), waste from the extraction of mercury from cinnabar, they have potential silver content. What would be the ideal method to benefit them?
Within our concessions have abundant tailings (2% Hg and 10 oz Ag/TM), waste from the extraction of mercury from cinnabar, they have potential silver content. What would be the ideal method to benefit them?
Last replied to by Marshal Meru
The raw materials are sandstones with contents of cinnabar, which are the result of the processes of recovery of Hg retorts used by the Spaniards for the 1700. Silver is found as native. So the idea i...
The raw materials are sandstones with contents of cinnabar, which are the result of the processes of recovery of Hg retorts used by the Spaniards for the 1700. Silver is found as native. So the idea i...
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1261
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Started by Helena Russell
How low can your solid tails go?Low grade ores ranging 0.6 - 1.0 g/t Au (silver ignored), Low Cu (25-50 g/t0Gravity- CIL circuit gold processing plant.
How low can your solid tails go?Low grade ores ranging 0.6 - 1.0 g/t Au (silver ignored), Low Cu (25-50 g/t0Gravity- CIL circuit gold processing plant.
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877
VIEWS
Started by Amar
Just wondering if there is a better way, environmentally, to reprocess mercury-rich gold tailings other than using a retort! The tailings belong to an old Whole Ore Amalgamation process at a saprolite deposit.
Just wondering if there is a better way, environmentally, to reprocess mercury-rich gold tailings other than using a retort! The tailings belong to an old Whole Ore Amalgamation process at a saprolite deposit.
Last replied to by Amar
Gravity Concentrators can only recover about 60-70% of the mercury at best.
Gravity Concentrators can only recover about 60-70% of the mercury at best.
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1174
VIEWS
Started by
Anyone experience any significant correlation between feed rate and grade/recovery in GRG concentration test work?If we run 50kg batch, 20 kg batch, 2 kg batch with similar feed rate and other parameters, anyone experience any significant difference ...
Anyone experience any significant correlation between feed rate and grade/recovery in GRG concentration test work?If we run 50kg batch, 20 kg batch, 2 kg batch with similar feed rate and other parameters, anyone experience any significant difference ...
Last replied to by
Totally agree with all the above. The nugget effect calls for a larger sample size. Start-up and shutdown effects will bias results so the longer you are at steady state, the better.You need to think ...
Totally agree with all the above. The nugget effect calls for a larger sample size. Start-up and shutdown effects will bias results so the longer you are at steady state, the better.You need to think ...
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1023
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Started by OberstGruppen
There is any specific reaction, to describe the process of amalgamation of gold?
There is any specific reaction, to describe the process of amalgamation of gold?
Last replied to by
Just straight physical dissolution as sugar dissolves in water. The gold SG is 19.3 and the mercury SG 13.6 if you would take a gold concentrate and assume it is liberated largely from a host like sil...
Just straight physical dissolution as sugar dissolves in water. The gold SG is 19.3 and the mercury SG 13.6 if you would take a gold concentrate and assume it is liberated largely from a host like sil...
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1349
VIEWS
Started by
We have a heavy mineral sand project and we would want to use standards samples. Most of our analyses are done by heavy liquid separation to get the Total Heavy Minerals (THM). For now, we use a homogenized bulk sample for our standards but it’s n...
We have a heavy mineral sand project and we would want to use standards samples. Most of our analyses are done by heavy liquid separation to get the Total Heavy Minerals (THM). For now, we use a homogenized bulk sample for our standards but it’s n...
Last replied to by
Thanks for the answers.After having checked the above proposed solutions, I finally checked with the lab in charge of the standards for our Canadian open pit operation and they said that won’t be a ...
Thanks for the answers.After having checked the above proposed solutions, I finally checked with the lab in charge of the standards for our Canadian open pit operation and they said that won’t be a ...
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1075
VIEWS
Started by
"Diamond Soaks" for Separating Precious Metals from Precious Stones: Are There Any New and Efficient Methods Better Thank Aqua Regia Then Sieve Shakers? This is a process for recycling by separating precious stones from gold, silver, the platinum gro...
"Diamond Soaks" for Separating Precious Metals from Precious Stones: Are There Any New and Efficient Methods Better Thank Aqua Regia Then Sieve Shakers? This is a process for recycling by separating precious stones from gold, silver, the platinum gro...
Last replied to by
You can use AR with ultrasonic, this will help in agitating impurities so that you have better results separating Au from other metals. Properly alloyed metals should not dissolve and leave behind lar...
You can use AR with ultrasonic, this will help in agitating impurities so that you have better results separating Au from other metals. Properly alloyed metals should not dissolve and leave behind lar...
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902
VIEWS
Started by Standartenfurer
We have a placer gold mine in the remote area, the grade is 0.3 ppm and the reserve is 30 million tons. We do not have water and maximum recovery with Knelson is around 40%, can anyone help for processing?
We have a placer gold mine in the remote area, the grade is 0.3 ppm and the reserve is 30 million tons. We do not have water and maximum recovery with Knelson is around 40%, can anyone help for processing?
Last replied to by Standartenfurer
We are working on characterization tests and will inform you the result shortly.
We are working on characterization tests and will inform you the result shortly.
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1961
VIEWS
Started by
We are giving feed to Rougher spiral with 58.8% Fe, Concentrate yields 60% along with 63%Fe, Again this material is sending for Second stage treatment (Cleaner stage) here its producing 64.2%Fe. But, total tailing from Spiral Circuit contains 55% yie...
We are giving feed to Rougher spiral with 58.8% Fe, Concentrate yields 60% along with 63%Fe, Again this material is sending for Second stage treatment (Cleaner stage) here its producing 64.2%Fe. But, total tailing from Spiral Circuit contains 55% yie...
Last replied to by Obergruppenfuhrer
I appreciate your response and that you are planning to try out the tests suggested. If you do require a plant audit then our company CDE Asia Ltd could be of service. We have an agreement with GHD of...
I appreciate your response and that you are planning to try out the tests suggested. If you do require a plant audit then our company CDE Asia Ltd could be of service. We have an agreement with GHD of...
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1308
VIEWS
Started by
Is it possible to gravity concentrate a gold dump during the rainy season using sluices taking advantage of the natural drainage system?
Is it possible to gravity concentrate a gold dump during the rainy season using sluices taking advantage of the natural drainage system?
Last replied to by
1. Size approximately 300tons no characterisation has been done yet. At lower levels visible Au is observed on panning. There is also a low grade 0.43g/t Au gravel of unknown tonnage in the area. 2. S...
1. Size approximately 300tons no characterisation has been done yet. At lower levels visible Au is observed on panning. There is also a low grade 0.43g/t Au gravel of unknown tonnage in the area. 2. S...
Hello Alex - Did you get your clay problems solved? Hello Deano - Interested in your observations about a prewash for heavy clays? Do you provide tech services? Rob rslavik@tanzaniangoldfields.com...