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8
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2672
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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 ...
11
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1165
VIEWS
Started by Zander Barcalow
I'm looking for methods of industrial processing of titanium ores which follows the initial "gravity separations".
I'm looking for methods of industrial processing of titanium ores which follows the initial "gravity separations".
Last replied to by yes
how can i increase grade of titanium (ilmenite) from iron?i mean above 65 percent with flotation
how can i increase grade of titanium (ilmenite) from iron?i mean above 65 percent with flotation
21
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3103
VIEWS
Started by
I am mining in Ghana and wonder which type of gold washing plant are better: rotary scrubber/ trommel or drum scrubber/ trommel concentrator.
I am mining in Ghana and wonder which type of gold washing plant are better: rotary scrubber/ trommel or drum scrubber/ trommel concentrator.
Last replied to by David
Gold Wash Plants of all sizes & budgets https://www.911metallurgist.com/equipment/alluvial/gold-wash-plants/
Gold Wash Plants of all sizes & budgets https://www.911metallurgist.com/equipment/alluvial/gold-wash-plants/
10
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1907
VIEWS
Started by JohnnyD
Do we finally have a viable efficiency low-cost "Cheap" Gold Recovery Process that most can afford? Could Gravity + Intensive Leach help small mining Companies or individual process Gold in more cost effective manner? Some study in stopping the ille...
Do we finally have a viable efficiency low-cost "Cheap" Gold Recovery Process that most can afford? Could Gravity + Intensive Leach help small mining Companies or individual process Gold in more cost effective manner? Some study in stopping the ille...
Last replied to by Darkchild101
Hi I would be interested to know if there are any new developments in this area/research. We plan on recovering gold from tailings in Zimbabwe and are faced with shortage of capital. Is there any way...
Hi I would be interested to know if there are any new developments in this area/research. We plan on recovering gold from tailings in Zimbabwe and are faced with shortage of capital. Is there any way...
4
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2150
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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...
Last commented on by Tererai
hi Connayil how can i calculate the circulating load analytically
hi Connayil how can i calculate the circulating load analytically
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779
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Started by
What method would be best to use for the washing of coal tailings having ash of ranges from 45-54um
What method would be best to use for the washing of coal tailings having ash of ranges from 45-54um
Last replied to by Treve Mildren
The old Mozley MGS certainly wasn't worth consideration due to its inability to pull sufficient material to concentrate. Development work by Gravity Mining ltd in conjunction with the Camborne School ...
The old Mozley MGS certainly wasn't worth consideration due to its inability to pull sufficient material to concentrate. Development work by Gravity Mining ltd in conjunction with the Camborne School ...
5
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1374
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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...
Last replied to by Khosana
Hi there, I would suggest that you perform mineralogy studies first before you could rule-out the use of magnet separation.
Hi there, I would suggest that you perform mineralogy studies first before you could rule-out the use of magnet separation.
5
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1253
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...
Last replied to by dk
You may use the same existing system if required with lower rpm and necessary lifter bars for scrubbing and increase the retention time. The processed water may be taken to 2/3 compartment tanks f...
You may use the same existing system if required with lower rpm and necessary lifter bars for scrubbing and increase the retention time. The processed water may be taken to 2/3 compartment tanks f...
31
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4778
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Started by Jean Rasczak
I need a Rotary Pan (De Beers Pan) for diamond recovery. Used or new will do. I was told before that the Rotary pan does not work in Brazil, apparently they prefer Jigs in Brazil. Can anybody comment on this as to why, maybe? I am very familiar with...
I need a Rotary Pan (De Beers Pan) for diamond recovery. Used or new will do. I was told before that the Rotary pan does not work in Brazil, apparently they prefer Jigs in Brazil. Can anybody comment on this as to why, maybe? I am very familiar with...
Last replied to by Carlos Veloso
I would like to congratulate all members of this group for the interest and opinions posted here, especially on the Rotary Pan. For humans was always easier to condemn a machine to accept possible ope...
I would like to congratulate all members of this group for the interest and opinions posted here, especially on the Rotary Pan. For humans was always easier to condemn a machine to accept possible ope...
11
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2161
VIEWS
Started by
I'm working on beneficiation of barium sulfate from low grade barite ore (64.2% BaSO4) in presence of 28.01 SiO2 and 4.8 PbO. 4.8% PbO with 28% SiO2. We want to achieve min 4.2 S.G with less than 250 ppm Lead. (OCMA Standard) Does anyone have any ...
I'm working on beneficiation of barium sulfate from low grade barite ore (64.2% BaSO4) in presence of 28.01 SiO2 and 4.8 PbO. 4.8% PbO with 28% SiO2. We want to achieve min 4.2 S.G with less than 250 ppm Lead. (OCMA Standard) Does anyone have any ...
Last replied to by David
See https://www.911metallurgist.com/blog/barite-beneficiation-process-plant-flowsheet
See https://www.911metallurgist.com/blog/barite-beneficiation-process-plant-flowsheet
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1308
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...
19
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1098
VIEWS
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...
9
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1461
VIEWS
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...
2
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1423
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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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941
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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.
Last replied to by Sturmbann
There is no magic number. It depends on the mineralogy of your ore and the efficiency of your process. When I was the plant met at the Tarmoola mill, we went for a week with no measurable gold in the ...
There is no magic number. It depends on the mineralogy of your ore and the efficiency of your process. When I was the plant met at the Tarmoola mill, we went for a week with no measurable gold in the ...
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625
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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.
4
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879
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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693
VIEWS
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...
5
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910
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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 ...
3
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680
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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628
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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.
15
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1456
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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...
6
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847
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...
3
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1141
VIEWS
Started by Bob Mathias
The video shows one that was shown last year at electra mining. It gives some idea on how it works I just wonder how this can be applied to different mineral ores? What is the discriminatory edge with this method? Meaning how different must the dens...
The video shows one that was shown last year at electra mining. It gives some idea on how it works I just wonder how this can be applied to different mineral ores? What is the discriminatory edge with this method? Meaning how different must the dens...
Last replied to by
Rock of 3.0 g/cc can be separated from rock of 2.0 g/cc. Separating 3 cm2 rock from 4 cm2 rock would be a classification process using screens not spirals. https://www.youtube.com/watch?v=O64USKI_UDs
Rock of 3.0 g/cc can be separated from rock of 2.0 g/cc. Separating 3 cm2 rock from 4 cm2 rock would be a classification process using screens not spirals. https://www.youtube.com/watch?v=O64USKI_UDs
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721
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Started by
Might is be for base metal recovery by flotation or gold by leaching and flotation, a Mobile and Modular Process Plants only use to be a thing of the pass... no more. While gold and other placer operations (diamonds) are the big users in numbers of ...
Might is be for base metal recovery by flotation or gold by leaching and flotation, a Mobile and Modular Process Plants only use to be a thing of the pass... no more. While gold and other placer operations (diamonds) are the big users in numbers of ...
Last replied to by
The old Yuba Manufacturing company which operated from the late 1890's to about 1960 built many floating dredges that also include a gravity circuit on them. I used to have a picture showing four or f...
The old Yuba Manufacturing company which operated from the late 1890's to about 1960 built many floating dredges that also include a gravity circuit on them. I used to have a picture showing four or f...
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1151
VIEWS
Started by Zander Barcalow
Can any body tell me cut- off grade of Tantalum in alluvial deposit for economical mining &processing. Tantalum present in alluvial deposit in the form of Coltan.
Can any body tell me cut- off grade of Tantalum in alluvial deposit for economical mining &processing. Tantalum present in alluvial deposit in the form of Coltan.
Last replied to by
Cut-offs around 150-200 pp is an industry standard to look out for, below this, you may be wasting your time. The above comments are all true. On alluvial/eluvial - overburden depth is critical. On ha...
Cut-offs around 150-200 pp is an industry standard to look out for, below this, you may be wasting your time. The above comments are all true. On alluvial/eluvial - overburden depth is critical. On ha...
4
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827
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Started by Marshal Meru
The performance of Churn Drills on wet alluvial merits some discussion as I agree that Churn Drills are EXCELLENT on DRY-ISH ground (terraces, small creeks, paleoplacers etc) but USELESS on WET ground such as floodplains or below water tables. Possi...
The performance of Churn Drills on wet alluvial merits some discussion as I agree that Churn Drills are EXCELLENT on DRY-ISH ground (terraces, small creeks, paleoplacers etc) but USELESS on WET ground such as floodplains or below water tables. Possi...
Last replied to by Zander Barcalow
Whenever people suggest applying factors to assay numbers they are implicitly admitting they have sampling problems. When you use holes drilled by different machines, each producing its distinctive di...
Whenever people suggest applying factors to assay numbers they are implicitly admitting they have sampling problems. When you use holes drilled by different machines, each producing its distinctive di...
20
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956
VIEWS
Started by
Could a Dredging Bucket be used for alluvial mining? I suppose it is an accessory that replaces a bucket of an excavator. Cutter head and slurry pump moved by the hydraulic. Has anyone known or worked it?
Could a Dredging Bucket be used for alluvial mining? I suppose it is an accessory that replaces a bucket of an excavator. Cutter head and slurry pump moved by the hydraulic. Has anyone known or worked it?
Last replied to by
Glad to learn the craft of dredging has yet to be classified as an extinct procedure of interest to archaeologists.
Glad to learn the craft of dredging has yet to be classified as an extinct procedure of interest to archaeologists.
16
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903
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Started by
Knowing that gold particles do not exceed 0.25mm and with the 1/32'' portion ranging between 15-20% and absence of clays. Would it not pay off to classify further before feeding the jigs or centrifuges, say down to 1/32''? If so are multi-deck...
Knowing that gold particles do not exceed 0.25mm and with the 1/32'' portion ranging between 15-20% and absence of clays. Would it not pay off to classify further before feeding the jigs or centrifuges, say down to 1/32''? If so are multi-deck...
Last replied to by Jean Rasczak
Agree with above comments. Classification is a method of concentration and it can be overkill at some point. Bench scale or pilot scale testing is required. The full range particle size analysis is re...
Agree with above comments. Classification is a method of concentration and it can be overkill at some point. Bench scale or pilot scale testing is required. The full range particle size analysis is re...
16
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1462
VIEWS
Started by
We operate an InLine Leach Reactor (ILR) by Gekko used to leach gravity gold. The problem we have is to estimate the Au recovered using Solution assays & tons from volume measurements. The variance in gold metal we are missing is always around -...
We operate an InLine Leach Reactor (ILR) by Gekko used to leach gravity gold. The problem we have is to estimate the Au recovered using Solution assays & tons from volume measurements. The variance in gold metal we are missing is always around -...
Last replied to by
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 ...
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 ...
4
REPLIES
1072
VIEWS
Started by JohnnyD
Using gravity concentrators like spirals or jigs, how is the water distribution estimated or calculated between Concentrate and Reject/tailings? During preparation of the Flow sheet from lab results we came across water balance of the gravity concen...
Using gravity concentrators like spirals or jigs, how is the water distribution estimated or calculated between Concentrate and Reject/tailings? During preparation of the Flow sheet from lab results we came across water balance of the gravity concen...
Last replied to by
Spirals will cut the water split to the reject such that extra water is often needed to carry the heavy concentrate to the collection point.Jig water split is a matter of hutch water addition. As the ...
Spirals will cut the water split to the reject such that extra water is often needed to carry the heavy concentrate to the collection point.Jig water split is a matter of hutch water addition. As the ...
3
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778
VIEWS
Started by Victor Bergman
I know of a placer gold mine with an average grade is 0.3 ppm (0.3 gram/tonne) and the reserve is 30 million tons. The mine located in remote area and we do not have sufficient water although we send a sample for Knelson company but the max recove...
I know of a placer gold mine with an average grade is 0.3 ppm (0.3 gram/tonne) and the reserve is 30 million tons. The mine located in remote area and we do not have sufficient water although we send a sample for Knelson company but the max recove...
Last replied to by JohnnyD
First to screen and reduce the weight for the value mineral, then is available a air classification for the -2 mm - 1 mm.(I do not know for 700tons/hr capacity, may be) Then Knelson of course many uni...
First to screen and reduce the weight for the value mineral, then is available a air classification for the -2 mm - 1 mm.(I do not know for 700tons/hr capacity, may be) Then Knelson of course many uni...
5
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734
VIEWS
Started by JohnnyD
When is a Heavy Media separation system applied for processing of Lead & Zinc ore? Generally processing of which type of lead and zinc ore is practical using heavy media? Which design criteria should be considered?
When is a Heavy Media separation system applied for processing of Lead & Zinc ore? Generally processing of which type of lead and zinc ore is practical using heavy media? Which design criteria should be considered?
Last replied to by David
Nyrstar in Tennessee has 2 processing plants using Heavy Media Separation on a 2.6% Zn sphalerite hosted in dolomite. 60% of the mass reports to tails of 0.2% Zn while the flotation feed created by t...
Nyrstar in Tennessee has 2 processing plants using Heavy Media Separation on a 2.6% Zn sphalerite hosted in dolomite. 60% of the mass reports to tails of 0.2% Zn while the flotation feed created by t...
2
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1619
VIEWS
Started by Victor Bergman
How to calculate the process water and Hutch water for Iron ore processing on Jigs? How water is redistributed in hutch and process water. If there is any thumb rule to calculate hutch water for 4m and 2.5m jig area. How much water is going out throu...
How to calculate the process water and Hutch water for Iron ore processing on Jigs? How water is redistributed in hutch and process water. If there is any thumb rule to calculate hutch water for 4m and 2.5m jig area. How much water is going out throu...
Last replied to by David
Hi Bob - did you ever get an answer to this question?