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8
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2810
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Started by jyefrey
Hi,Does anyone knows how to remove froth from Magnetite tailings feed tank as it causes poor clarity in the tailings thickeners. The tails feed tank consist of several streams e.g. cyclone overflows, and froth tails. I know it is very uncommon to h...
Hi,Does anyone knows how to remove froth from Magnetite tailings feed tank as it causes poor clarity in the tailings thickeners. The tails feed tank consist of several streams e.g. cyclone overflows, and froth tails. I know it is very uncommon to h...
5
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1790
VIEWS
Started by spaceexplorer
Industrial Applications of Tailings Does anyone have any idea or know in which industries that discharged tailings could serve as economic raw material? Besides gold which is our primary target, our tailings are fairly rich in Ag, Cu, Fe and Pb; bu...
Industrial Applications of Tailings Does anyone have any idea or know in which industries that discharged tailings could serve as economic raw material? Besides gold which is our primary target, our tailings are fairly rich in Ag, Cu, Fe and Pb; bu...
21
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4291
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Started by
I'm looking for the most efficient way to de-water the tailings leaving my froth flotation Pg-Ag process. Having a very limited space around the plant (the plant itself 150 Tons/Day) I can't be creating a new tailing pond but rather implementing some...
I'm looking for the most efficient way to de-water the tailings leaving my froth flotation Pg-Ag process. Having a very limited space around the plant (the plant itself 150 Tons/Day) I can't be creating a new tailing pond but rather implementing some...
Last replied to by Oberfuhrer
What is your current Vortex and Apex diameters? Have you tried just a little bit smaller Apex from where you are now? I don't think you will get 85% without plugging. You are asking a cyclone to do th...
What is your current Vortex and Apex diameters? Have you tried just a little bit smaller Apex from where you are now? I don't think you will get 85% without plugging. You are asking a cyclone to do th...
2
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2442
VIEWS
Started by Sridharan
Dear Sirs, I would like to know for my academic interest about the ways to recycle the overburden, tailing etc. of a gold mine into reusable construction and relevant filling material if any. Thanks and regards. Sridhar Pondicherry
Dear Sirs, I would like to know for my academic interest about the ways to recycle the overburden, tailing etc. of a gold mine into reusable construction and relevant filling material if any. Thanks and regards. Sridhar Pondicherry
2
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3379
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Started by Charlie
Hello everyone, generally, by how much is: The settling rate of a flotation concentrate increased when the correct flocculant is applied? The filtration rate of that same flotation concentrate increased when the correct type and amount of flo...
Hello everyone, generally, by how much is: The settling rate of a flotation concentrate increased when the correct flocculant is applied? The filtration rate of that same flotation concentrate increased when the correct type and amount of flo...
3
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2401
VIEWS
Started by snowlakemet
Hello, Looking at filter press options. Is it possible to size a filter with the following information: Mill Feed 4000 dmt/day Cu Conc: 150 dmt/day - feed density 40% Zn Conc: 700 dmt/day - feed density 50% Cu Conc: particle size 70% passing 3...
Hello, Looking at filter press options. Is it possible to size a filter with the following information: Mill Feed 4000 dmt/day Cu Conc: 150 dmt/day - feed density 40% Zn Conc: 700 dmt/day - feed density 50% Cu Conc: particle size 70% passing 3...
13
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2445
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Started by
Can it be possible for caustic soda (NaOH) to form bridging flocculation in a slurry?
Can it be possible for caustic soda (NaOH) to form bridging flocculation in a slurry?
1
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2189
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Started by jovanifirebird
Do you think it is possible to get an overflow of 1% solid by weight with the right water balance requirement in high rate thickeners or in a gold processing plant? I believe not. Why I am asking you this is, because the plant I got engaged got ...
Do you think it is possible to get an overflow of 1% solid by weight with the right water balance requirement in high rate thickeners or in a gold processing plant? I believe not. Why I am asking you this is, because the plant I got engaged got ...
2
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2824
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Started by Javier Ramirez
A gold cyanide leaching plant uses four CCD thickeners. Each is being fed with flocculant and a clear overflow obtained. Now, planning is to produce paste tailings out from the last thickener in the series. At least 68% solids by weight is needed. Pr...
A gold cyanide leaching plant uses four CCD thickeners. Each is being fed with flocculant and a clear overflow obtained. Now, planning is to produce paste tailings out from the last thickener in the series. At least 68% solids by weight is needed. Pr...
Last replied to by Javier Ramirez
Dear friends, Thanks for your comments and advice. I will do as recommended. Regards, Javier
Dear friends, Thanks for your comments and advice. I will do as recommended. Regards, Javier
1
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2829
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Started by aopatma
I'm a student trying to build a model of a hydraulic classifier. Can anyone tell me if there are any publications out there that might help me with working out the dimensions of the cells? Also, any information on the construction of the classifier ...
I'm a student trying to build a model of a hydraulic classifier. Can anyone tell me if there are any publications out there that might help me with working out the dimensions of the cells? Also, any information on the construction of the classifier ...
Last commented on by David
Also see https://www.911metallurgist.com/blog/hindered-settling-equipment-classifier
Also see https://www.911metallurgist.com/blog/hindered-settling-equipment-classifier
1
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1582
VIEWS
Started by E
We have tested CO2 shortly couple years ago in our tailings thickening pilot where we added the gas in to feed tank (open tank reactor). We only had two open 1/2" steel pipes in bottom of the tank without any ejectors or diffusers. pH dropped e...
We have tested CO2 shortly couple years ago in our tailings thickening pilot where we added the gas in to feed tank (open tank reactor). We only had two open 1/2" steel pipes in bottom of the tank without any ejectors or diffusers. pH dropped e...
Last replied to by David
Hello E, and welcome. I have never done this myself. I would, however, be careful in adding gas into the thickener feed-well. If you material contained reagents, it could froth-up your and preven...
Hello E, and welcome. I have never done this myself. I would, however, be careful in adding gas into the thickener feed-well. If you material contained reagents, it could froth-up your and preven...
13
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4137
VIEWS
Started by Maya Rothman
Cyanide Detoxification of tailings from gold and silver ore with sodium metabisulfite, I would like if you can tell me your experiences with this process, I want to reduce from 900 ppm to 25 ppm.
Cyanide Detoxification of tailings from gold and silver ore with sodium metabisulfite, I would like if you can tell me your experiences with this process, I want to reduce from 900 ppm to 25 ppm.
Last replied to by Helena Russell
Very straightforward stoichiometry: SO2: CN ratio is critical to efficiency. As well as pH, Cu+, residence time. Appropriate lab equipment simulating plant conditions is preferred for test work.
Very straightforward stoichiometry: SO2: CN ratio is critical to efficiency. As well as pH, Cu+, residence time. Appropriate lab equipment simulating plant conditions is preferred for test work.
3
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1760
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Started by Jean Rasczak
I can discuss their experiences in using calcium polysulfide instead of sodium metabisulfite. What would be the advantages of using calcium polysulfide?Tests Plan and laboratory! I wish to change the sodium metabisulfite and use the calcium polysulfi...
I can discuss their experiences in using calcium polysulfide instead of sodium metabisulfite. What would be the advantages of using calcium polysulfide?Tests Plan and laboratory! I wish to change the sodium metabisulfite and use the calcium polysulfi...
Last replied to by Gruppen
As discussed polysulphide is suitable for polishing metals after the cyanide has been destroyed. Commercially for high tonnage mine slurries the main options for cyanide destruction are the INCO proce...
As discussed polysulphide is suitable for polishing metals after the cyanide has been destroyed. Commercially for high tonnage mine slurries the main options for cyanide destruction are the INCO proce...
9
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2229
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Started by Sachin Prakash
Does anyone have experience about flocculent impact on Molybdenum flotation?As you know overflow of thickener will be used as process water in grinding and flotation area. Recently we faced with a question about how doesflocculation in tailing thicke...
Does anyone have experience about flocculent impact on Molybdenum flotation?As you know overflow of thickener will be used as process water in grinding and flotation area. Recently we faced with a question about how doesflocculation in tailing thicke...
Last replied to by Amar
Are you facing any such problems? If yes you change flow sheet design by adding cyclone before thickener and avoid flocculent addition.
Are you facing any such problems? If yes you change flow sheet design by adding cyclone before thickener and avoid flocculent addition.
14
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3015
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Started by Zander Barcalow
What's the best way to break down flocculants that when in use, blinds up filter clothes? Heat or agitation or both? How do I stop filter cloth blinding by flocculant?
What's the best way to break down flocculants that when in use, blinds up filter clothes? Heat or agitation or both? How do I stop filter cloth blinding by flocculant?
Last replied to by Kumar Choudhry
Try washing them with hot water and the floc should dissolve. This has always worked for me when trying to remove floc build up.
Try washing them with hot water and the floc should dissolve. This has always worked for me when trying to remove floc build up.
2
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1502
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Started by Victor Bergman
Someone know where can I find updated information about the marketability of the Sulphuric acid?
Someone know where can I find updated information about the marketability of the Sulphuric acid?
Last replied to by
Does AMD produced by copper mines contain sulphuric acid? Sulfuric acid is the contributing acid to all AMD regardless of commodity. The concentration (AMD is diluted) and purity is the problem to usi...
Does AMD produced by copper mines contain sulphuric acid? Sulfuric acid is the contributing acid to all AMD regardless of commodity. The concentration (AMD is diluted) and purity is the problem to usi...
7
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1478
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Started by
Anyone knows what % of a mine company's investment budget is allocated to treating AMD? I understand it is a very broad topic and that the answer will be very much company dependant but even so, there must be a way to have a reasonable average?
Anyone knows what % of a mine company's investment budget is allocated to treating AMD? I understand it is a very broad topic and that the answer will be very much company dependant but even so, there must be a way to have a reasonable average?
Last replied to by Gruppen
All, this is an interesting question, and raises more issues than would appear. We had a visit from Tony Hodge (president ICMM) some time ago. He gave an example of a mine which, at closure, had to in...
All, this is an interesting question, and raises more issues than would appear. We had a visit from Tony Hodge (president ICMM) some time ago. He gave an example of a mine which, at closure, had to in...
6
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1336
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Started by
Someone know if there is a standard to do lab tests regarding filtration using an activated carbon column? Which are the main parameters to take in account for this kind of tests? Only the most fine suspended solids from the water.
Someone know if there is a standard to do lab tests regarding filtration using an activated carbon column? Which are the main parameters to take in account for this kind of tests? Only the most fine suspended solids from the water.
Last replied to by Jean Rasczak
Yes there are coal based media that do not have the added cost of carbon activation.
Yes there are coal based media that do not have the added cost of carbon activation.
15
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1748
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Started by Paul Morrow
Which is the best way to treat (dewatering) sludges from AMD treatment with hydrated lime (and cheap), the sludges are composed mainly by Fe(OH)3, Al(OH)3, Un reacted lime, some of CaSO4, SiO2?Really they are very hydrated and voluminous.
Which is the best way to treat (dewatering) sludges from AMD treatment with hydrated lime (and cheap), the sludges are composed mainly by Fe(OH)3, Al(OH)3, Un reacted lime, some of CaSO4, SiO2?Really they are very hydrated and voluminous.
Last replied to by Paul Morrow
Many thanks for your comments; all your comments are very useful for me.
Many thanks for your comments; all your comments are very useful for me.
9
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1524
VIEWS
Started by
Does anyone has information about acid mine drainage neutralization using limestone? The lab recommended lab tests? Information’s about column design? I would appreciate your help.
Does anyone has information about acid mine drainage neutralization using limestone? The lab recommended lab tests? Information’s about column design? I would appreciate your help.
Last replied to by
Limestone is not the magic bullet that a lot of people think it is for passive treatment of acid drainage due to the potential of sulfate armoring. Are you looking at a passive or active system? There...
Limestone is not the magic bullet that a lot of people think it is for passive treatment of acid drainage due to the potential of sulfate armoring. Are you looking at a passive or active system? There...
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1339
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Started by Bob Mathias
In an AMD how can I estimate the iron concentration (Fe+2 abd Fe+3) through the measurement of the Redox potential?
In an AMD how can I estimate the iron concentration (Fe+2 abd Fe+3) through the measurement of the Redox potential?
Last replied to by Bob Mathias
Many Thanks to everybody, your comments are very useful for me.
Many Thanks to everybody, your comments are very useful for me.
10
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1452
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Started by
Citizen science and cooperation between miners and environmental group in Michigan.I think this will be worth watching - hopefully an appropriate level of scientific rigor can be maintained in the monitoring program.http://www.circleofblue.org/watern...
Citizen science and cooperation between miners and environmental group in Michigan.I think this will be worth watching - hopefully an appropriate level of scientific rigor can be maintained in the monitoring program.http://www.circleofblue.org/watern...
Last replied to by Standartenfurer
They also made a presentation on Pueblo Viejo, including this aspect, at the recent INAP-GA workshop on Sulphate Treatment in Salt Lake City.
They also made a presentation on Pueblo Viejo, including this aspect, at the recent INAP-GA workshop on Sulphate Treatment in Salt Lake City.
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1512
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Started by OberstGruppen
Does someone knows if possible determine the Acid Neutralisation Potential (ANP) reported in ABA tests from % CaO of a sample, like the Acid generation potential (AGP) from sulphides in a sample?
Does someone knows if possible determine the Acid Neutralisation Potential (ANP) reported in ABA tests from % CaO of a sample, like the Acid generation potential (AGP) from sulphides in a sample?
Last replied to by Maya Rothman
I see now the Ca is indeed present as CaO and therefore could assume it is reactive. Based on this information, you could perform several back-of-the-envelope calculations. The ANP (kg CaCO3/t) could ...
I see now the Ca is indeed present as CaO and therefore could assume it is reactive. Based on this information, you could perform several back-of-the-envelope calculations. The ANP (kg CaCO3/t) could ...
12
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1474
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Started by Obergruppenfuhrer
There are hundreds of websites, but most are repetitive, redundant. What specific journals, conferences, websites, and books should I read? I am targeting large copper porphyries in British Columbia.What are the latest techniques and methods?
There are hundreds of websites, but most are repetitive, redundant. What specific journals, conferences, websites, and books should I read? I am targeting large copper porphyries in British Columbia.What are the latest techniques and methods?
Last replied to by
Over time sodium is a killer where irrigation is necessary for crop survival. The Sunday’s river valley in South Africa is an example. With over 30 years of irrigation using water containing sodium ...
Over time sodium is a killer where irrigation is necessary for crop survival. The Sunday’s river valley in South Africa is an example. With over 30 years of irrigation using water containing sodium ...
25
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1587
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Started by Gruppen
Some states are considering legislature that would allow oil and gas companies to use AMD waters for fracking. The two largest benefits that I can see would be a reduced strain on freshwater (a single frack well uses over 4 million gallons of water) ...
Some states are considering legislature that would allow oil and gas companies to use AMD waters for fracking. The two largest benefits that I can see would be a reduced strain on freshwater (a single frack well uses over 4 million gallons of water) ...
Last replied to by Maya Rothman
Re tasking AMD is certainly practical. We are building and operating plants that convert the AMD into potable quality water that is used for agriculture and mine processes. So there is no reason why i...
Re tasking AMD is certainly practical. We are building and operating plants that convert the AMD into potable quality water that is used for agriculture and mine processes. So there is no reason why i...
13
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1427
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Started by Oberfuhrer
I’m working with supervision and remediation of mines and mine waste in Sweden and have come to the conclusion that even in a relatively small country like Sweden the demands on how to characterize and treat mine waste can differ. This made me curi...
I’m working with supervision and remediation of mines and mine waste in Sweden and have come to the conclusion that even in a relatively small country like Sweden the demands on how to characterize and treat mine waste can differ. This made me curi...
Last replied to by Oberfuhrer
I fail to see how the water policy or CEN can regulate how far the analyzes should go. But the links are very nice so thank you. As I said before I agree that what type of analyzes that should be done...
I fail to see how the water policy or CEN can regulate how far the analyzes should go. But the links are very nice so thank you. As I said before I agree that what type of analyzes that should be done...
25
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1330
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Started by Standartenfurer
Is anyone aware of a mine that has not been allowed to start operations because of potential AMD issues? Could the Pebble mine in Alaska be an example of such a mine?
Is anyone aware of a mine that has not been allowed to start operations because of potential AMD issues? Could the Pebble mine in Alaska be an example of such a mine?
Last replied to by Standartenfurer
Our paper was also peer reviewed at the National Ground Water Conference 2013. I do believe in Wetlands as a means of treating AMD. As you state, patience is a virtue when choosing wetlands as an opti...
Our paper was also peer reviewed at the National Ground Water Conference 2013. I do believe in Wetlands as a means of treating AMD. As you state, patience is a virtue when choosing wetlands as an opti...
4
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1502
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Started by Obersturmbann
Does anyone have any dealings with titanium dioxide mines?To be more specific I am looking at sand’s AMD/sulphuric acid issues.
Does anyone have any dealings with titanium dioxide mines?To be more specific I am looking at sand’s AMD/sulphuric acid issues.
Last replied to by
We have recently run titanium dioxide mine produced water through our process with great success. We recovered 100% of the sulphuric used and converted the remaining salts into potassium nitrate, ammo...
We have recently run titanium dioxide mine produced water through our process with great success. We recovered 100% of the sulphuric used and converted the remaining salts into potassium nitrate, ammo...
5
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1296
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Started by Sturmbann
I’ve been doing some acidity measurements recently (following the APHA 2310 method, including the hot peroxide pre-treatment). Then, I tried to compare my measured values with the total calculated acidity values (using the usual equation, taking in...
I’ve been doing some acidity measurements recently (following the APHA 2310 method, including the hot peroxide pre-treatment). Then, I tried to compare my measured values with the total calculated acidity values (using the usual equation, taking in...
4
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1596
VIEWS
Started by Hauptsturm
How can a water body with high hardness and sulfate be treated in best possible way? How to reduce both hardness and sulfate simultaneously from the water.The water already has a pH of 7.5. So, microbial alkalinity generation would increase the pH. I...
How can a water body with high hardness and sulfate be treated in best possible way? How to reduce both hardness and sulfate simultaneously from the water.The water already has a pH of 7.5. So, microbial alkalinity generation would increase the pH. I...
Last replied to by
Just to clarify, there are many systems that separate the water from the sulphate and causes of hardness.However, these treatment methods by themselves are no longer adequate as the mining industry an...
Just to clarify, there are many systems that separate the water from the sulphate and causes of hardness.However, these treatment methods by themselves are no longer adequate as the mining industry an...
12
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2808
VIEWS
Started by Oberstorm
There are some easy way to measure the solids content "In situ" of bleed from and AMD process?
There are some easy way to measure the solids content "In situ" of bleed from and AMD process?
Last replied to by Zander Barcalow
Another specific choice you will have to make is the filter mesh. 0.45 µm is inherited from drinking water bacteriology, but has the advantage to be known by everyone and be in plentiful supply.If yo...
Another specific choice you will have to make is the filter mesh. 0.45 µm is inherited from drinking water bacteriology, but has the advantage to be known by everyone and be in plentiful supply.If yo...
7
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1414
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Started by Unterstarm
Is it possible to infer the Eh (pe) of a solution from pH, metals and TDS?
Is it possible to infer the Eh (pe) of a solution from pH, metals and TDS?
Last replied to by Unterstarm
Many thanks for your comments were very useful for me.
Many thanks for your comments were very useful for me.
4
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1352
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Started by
Which is the Best way to determine the Residence time to reach a neutral pH, and guarantee the formation of all metal hydroxides, such as Fe(OH)3, Al(OH)3, in an active TDS acid water with Ca(OH)2?
Which is the Best way to determine the Residence time to reach a neutral pH, and guarantee the formation of all metal hydroxides, such as Fe(OH)3, Al(OH)3, in an active TDS acid water with Ca(OH)2?
Last replied to by
Could you send me more details of the method? The way to eliminate sulfates and Heavy metals?
Could you send me more details of the method? The way to eliminate sulfates and Heavy metals?
1
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1481
VIEWS
Started by
I am doing a correlation between the pH and the theoretical Ca(OH)2 requirement in mg per liter of acid drainage to reach to neutral Zone and precipitate Fe and Al.The expression has the following form: mgCa(OH)2/L acid = k pH ^( -n). Where k is a co...
I am doing a correlation between the pH and the theoretical Ca(OH)2 requirement in mg per liter of acid drainage to reach to neutral Zone and precipitate Fe and Al.The expression has the following form: mgCa(OH)2/L acid = k pH ^( -n). Where k is a co...
Last replied to by Bob Mathias
Sounds like a pH stat titration may suit your requirements first on a closed system to determine optimum dosing rates then on a flow through system to demonstrate dynamic system control. By undertakin...
Sounds like a pH stat titration may suit your requirements first on a closed system to determine optimum dosing rates then on a flow through system to demonstrate dynamic system control. By undertakin...
Hi Pefh, can I ask for your design as preferences? I am doing horizontal vacuum belt filter design for phosphoric acid production from phosphate rock and I don't know how to size this. If could, pleas...