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2
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16933
VIEWS
Started by Collin Amonde
I am currently using Borax, Silica flour, Soda ash and Potassium nitrate, the sludge contains also copper, I need a guideline on flux calculation to use in order to move the copper or any other Base metal to the slag. I would like to know more a...
I am currently using Borax, Silica flour, Soda ash and Potassium nitrate, the sludge contains also copper, I need a guideline on flux calculation to use in order to move the copper or any other Base metal to the slag. I would like to know more a...
8
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1826
VIEWS
Started by
I've read some comments in other debates on stockpile sampling, modelling and reconciling but here is my question:How do you manage very large, old, buried stockpiles (up to millions of tons, dumped years to decades ago, buried a couple meters down) ...
I've read some comments in other debates on stockpile sampling, modelling and reconciling but here is my question:How do you manage very large, old, buried stockpiles (up to millions of tons, dumped years to decades ago, buried a couple meters down) ...
Last replied to by Moneer_Noor
in Bauxite ore, we used excavator to made holes in systematic interval and collect samples in 0.5m depth interval. The stockpile has divide 2 bodies from top to down each 8 meters because the excavat...
in Bauxite ore, we used excavator to made holes in systematic interval and collect samples in 0.5m depth interval. The stockpile has divide 2 bodies from top to down each 8 meters because the excavat...
4
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4091
VIEWS
Started by Leo5
how can one calculate or establish the slurry density comprising of two different solids at different solid concentrations and densities?
how can one calculate or establish the slurry density comprising of two different solids at different solid concentrations and densities?
Last commented on by geologist79
Thanks Alan for your valuable input. Now the problem we faced while preparing at the site (with basic beakers, stirrer etc) is the solution turned into a thick colloid. We started with a modest quanti...
Thanks Alan for your valuable input. Now the problem we faced while preparing at the site (with basic beakers, stirrer etc) is the solution turned into a thick colloid. We started with a modest quanti...
2
REPLIES
2117
VIEWS
Started by Seeker
How to neutralize excess m-nitrobenzene sulfonic acid sodium salt used in gold stripper after the gold has been removed from the substrate? Please help! Sorry if it is in the wrong category. I tried to search but could not get this category.
How to neutralize excess m-nitrobenzene sulfonic acid sodium salt used in gold stripper after the gold has been removed from the substrate? Please help! Sorry if it is in the wrong category. I tried to search but could not get this category.
3
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6688
VIEWS
Started by Marshal Meru
I have observed that Silver Nitrate in distilled water dissolves and give a clear solution but Silver Nitrate in raw (tap) water dissolve and give a milky solution. I happen to pour waste silver nitrate solution into the sink and when I open the t...
I have observed that Silver Nitrate in distilled water dissolves and give a clear solution but Silver Nitrate in raw (tap) water dissolve and give a milky solution. I happen to pour waste silver nitrate solution into the sink and when I open the t...
Last replied to by Jorge Quintanilla
I read in internet some tests that performed a chemical engineer.She did three different dilution.1. Silver nitrate with distilled water and potassium chloride,2. Silver nitrate with tap water3. Silve...
I read in internet some tests that performed a chemical engineer.She did three different dilution.1. Silver nitrate with distilled water and potassium chloride,2. Silver nitrate with tap water3. Silve...
1
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1994
VIEWS
Started by sherafat71
hi . how To obtain a retention time of solid particles and sediment in the pulp? Except for radioactive materials What materials can be used to obtain solids retention time? thanks
hi . how To obtain a retention time of solid particles and sediment in the pulp? Except for radioactive materials What materials can be used to obtain solids retention time? thanks
Last replied to by David
Hi, I use Lithium or Potassium as a liquid tracer. I know of no solid ones.
Hi, I use Lithium or Potassium as a liquid tracer. I know of no solid ones.
4
REPLIES
9012
VIEWS
Started by Daniel Mandreza
Hi guys, Our company has been operating 3 years now. We are a CIL plant hence we are handling cyanide. Our solution sample is being analyzed with Free cyanide by ISE method. However, the instrument has reached its limit and decided to break down. Ou...
Hi guys, Our company has been operating 3 years now. We are a CIL plant hence we are handling cyanide. Our solution sample is being analyzed with Free cyanide by ISE method. However, the instrument has reached its limit and decided to break down. Ou...
Last replied to by max skinner
I have used the colorimetric method for some time. you can purchase a B & L Spec 20 for around $200.00 on Ebay. The Spec 20 works well.
I have used the colorimetric method for some time. you can purchase a B & L Spec 20 for around $200.00 on Ebay. The Spec 20 works well.
4
REPLIES
1579
VIEWS
Started by kahonde
hie i am a student metallurgist at Mrasta mining pvt ltd in Zimbabwe.recently we have been facing challenges in trying to vat leach sulphide-gold ore.i proposed to change the lixiviant,better yet do a comparison between cyanide and ammonical-thiosulp...
hie i am a student metallurgist at Mrasta mining pvt ltd in Zimbabwe.recently we have been facing challenges in trying to vat leach sulphide-gold ore.i proposed to change the lixiviant,better yet do a comparison between cyanide and ammonical-thiosulp...
Last commented on by kahonde
kahondemalcom@gmail.com
kahondemalcom@gmail.com
1
REPLY
2666
VIEWS
Started by Andrews
Hello everyone, Not long ago, I saw one of you blog posts highlighting almost all the standard metallurgical crushing, milling, flotation of ores test. Unfortunately, I don't remember the title of the exact blog post. I will be grateful if you ca...
Hello everyone, Not long ago, I saw one of you blog posts highlighting almost all the standard metallurgical crushing, milling, flotation of ores test. Unfortunately, I don't remember the title of the exact blog post. I will be grateful if you ca...
Last replied to by David
Hi Andrews, the site is +2500 pages and growing. Use the search box at to top right of https://www.911metallurgist.com/blog/ it is in there somewhere but you have: Bond Ball and Rod Mill Work Ind...
Hi Andrews, the site is +2500 pages and growing. Use the search box at to top right of https://www.911metallurgist.com/blog/ it is in there somewhere but you have: Bond Ball and Rod Mill Work Ind...
6
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1835
VIEWS
Started by Standartenfurer
Hi. I'm interested in learning how to process the pyrite sulfide rich gold ores that are characteristic of the general area around Idaho Springs, Colorado. I'm a complete novice (currently I only run a sluicebox) and I understand that these are compl...
Hi. I'm interested in learning how to process the pyrite sulfide rich gold ores that are characteristic of the general area around Idaho Springs, Colorado. I'm a complete novice (currently I only run a sluicebox) and I understand that these are compl...
2
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2113
VIEWS
Started by spanner
We are producing a mixed metal hydroxide cake principally containing magnesium, ferrous iron, aluminium, zinc, copper and manganese. There are also smaller volumes of chromium, barium, cadmium, nickel, Beryllium, cobalt, strontium. We need help to se...
We are producing a mixed metal hydroxide cake principally containing magnesium, ferrous iron, aluminium, zinc, copper and manganese. There are also smaller volumes of chromium, barium, cadmium, nickel, Beryllium, cobalt, strontium. We need help to se...
8
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1797
VIEWS
Started by Trinadha rao
Hi & dear all, We have one million ton of iron ore tailing material contains 48-49%Fe and having size of around 80% of 10 microns material. we have carried out number of experiments on flotation and HGMS , as its having very fineness we failed to ...
Hi & dear all, We have one million ton of iron ore tailing material contains 48-49%Fe and having size of around 80% of 10 microns material. we have carried out number of experiments on flotation and HGMS , as its having very fineness we failed to ...
1
REPLY
1443
VIEWS
Started by FullerBack
Hello Everyone. I would like help in ways of reducing contained slag in ferrochrome fines produced by spiral washing of smelter slag. The method of calculation of of contained slag seems to negate any of the effects of washing as it tests Al in the m...
Hello Everyone. I would like help in ways of reducing contained slag in ferrochrome fines produced by spiral washing of smelter slag. The method of calculation of of contained slag seems to negate any of the effects of washing as it tests Al in the m...
Last replied to by Bob Mathias
Beneficiation of raw materials and utilisation of fines and slags maybe...
Beneficiation of raw materials and utilisation of fines and slags maybe...
4
REPLIES
1550
VIEWS
Started by Basel A-Shaban
Greetings: I would appreciate your help in identifying a processing and a purifying replacement substance to Mercury in gold mining. I am interested in presenting a less pollutant substance to Mercury that can be obtained in commercial quantities fo...
Greetings: I would appreciate your help in identifying a processing and a purifying replacement substance to Mercury in gold mining. I am interested in presenting a less pollutant substance to Mercury that can be obtained in commercial quantities fo...
Last replied to by MinEx Associates
There is no substitute as such - if borax was a real option, everyone would be using it. If for final recovery and cleaning, mercury is fine. It can be controlled. The issues with mercury are wi...
There is no substitute as such - if borax was a real option, everyone would be using it. If for final recovery and cleaning, mercury is fine. It can be controlled. The issues with mercury are wi...
2
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3512
VIEWS
Started by anjanisail
I want to know how Metallurgical Process Plant audit of an Iron Ore crushing and beneficiation Plant will be carried out. What are the process variables we need to study during audit of the plant. How many no. of samples I need to take at a samp...
I want to know how Metallurgical Process Plant audit of an Iron Ore crushing and beneficiation Plant will be carried out. What are the process variables we need to study during audit of the plant. How many no. of samples I need to take at a samp...
Last replied to by David
Watch https://www.911metallurgist.com/blog/how-to-evaluate-mineral-processing-plant-performance
Watch https://www.911metallurgist.com/blog/how-to-evaluate-mineral-processing-plant-performance
1
REPLY
2012
VIEWS
Started by gallala
What the adopted method used for lithium extraction from brine deposit?
What the adopted method used for lithium extraction from brine deposit?
Last replied to by David
Hello Mr. Gallala, and welcome back. A method for precipitating lithium from the brines was provided by one of the contract studies. The method employed addition of-aqueous AlCl3 and pH adjustmen...
Hello Mr. Gallala, and welcome back. A method for precipitating lithium from the brines was provided by one of the contract studies. The method employed addition of-aqueous AlCl3 and pH adjustmen...
1
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1770
VIEWS
Started by janakiram
Which Mathematical Modeling Module will be helpful in Metallurgy and materials science. please Suggest any online courses available. I am interested in leaning it.
Which Mathematical Modeling Module will be helpful in Metallurgy and materials science. please Suggest any online courses available. I am interested in leaning it.
Last replied to by Paul Morrow
Hi and welcome. See: http://www.amazon.com/Expert-Systems-Mineral-Metal-Processing/dp/0080417043http://www.amazon.com/Modern-Control-Design-MATLAB-SIMULINK/dp/0471496790http://www.amazon.com/Masterin...
Hi and welcome. See: http://www.amazon.com/Expert-Systems-Mineral-Metal-Processing/dp/0080417043http://www.amazon.com/Modern-Control-Design-MATLAB-SIMULINK/dp/0471496790http://www.amazon.com/Masterin...
2
REPLIES
1675
VIEWS
Started by Bhaduri
What is the optimal pH & temp to precipitate molybdic acid (MoO3.H2O) from an ammoniacal molybdate solution (assume 100's ppm elemental contaminants's such as soluble V & Ni & significant ammonium sulfate...100-gpL+) using conc H2SO4 or HNO3? The pre...
What is the optimal pH & temp to precipitate molybdic acid (MoO3.H2O) from an ammoniacal molybdate solution (assume 100's ppm elemental contaminants's such as soluble V & Ni & significant ammonium sulfate...100-gpL+) using conc H2SO4 or HNO3? The pre...
5
REPLIES
3573
VIEWS
Started by Bobson
Hi All, Does anyone have experience with representatively sampling dry/moist concentrate? After filtering, the concentrate is transported via conveyor belt (As usual). There are several places to install a cross belt sampler, however, I have...
Hi All, Does anyone have experience with representatively sampling dry/moist concentrate? After filtering, the concentrate is transported via conveyor belt (As usual). There are several places to install a cross belt sampler, however, I have...
Last replied to by David
In comparison, this is a general arrangement drawing for a $300,000 head pulley sample cutter construction. Also refer to https://www.911metallurgist.com/blog/types-models-sample-cutters
In comparison, this is a general arrangement drawing for a $300,000 head pulley sample cutter construction. Also refer to https://www.911metallurgist.com/blog/types-models-sample-cutters
2
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1962
VIEWS
Started by Tererai
What are the metallurgical process control test works that can be done in a gold processing plant, in trying to improve efficiency and reduce production cost? Starting from when ROM enters the plant till its at slimes dam
What are the metallurgical process control test works that can be done in a gold processing plant, in trying to improve efficiency and reduce production cost? Starting from when ROM enters the plant till its at slimes dam
Last replied to by Craig Lockhart
Hello Tery, I agree with Dizzy in that much more information is required to deliver a meaningful answer. Besides the process itself, the level of instrumentation in the plant (levels, temperature...
Hello Tery, I agree with Dizzy in that much more information is required to deliver a meaningful answer. Besides the process itself, the level of instrumentation in the plant (levels, temperature...
1
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1901
VIEWS
Started by emanus
in pH maintenance/controlling, why lime is most preferable in VAT leaching than caustic soda?
in pH maintenance/controlling, why lime is most preferable in VAT leaching than caustic soda?
Last replied to by David
Hi, Lime is cheaper more readily available than Caustic Soda. As a pH Regulator Agent: In the lab, the addition of lime makes easier to control the pH. Sodium Hydroxide is a powerful caustic age...
Hi, Lime is cheaper more readily available than Caustic Soda. As a pH Regulator Agent: In the lab, the addition of lime makes easier to control the pH. Sodium Hydroxide is a powerful caustic age...
8
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2368
VIEWS
Started by Amar
I would like to know more about tin processing. Which processes are used for upgrading the cassiterite ore? Is flotation the most common method used for treating cassiterite?
I would like to know more about tin processing. Which processes are used for upgrading the cassiterite ore? Is flotation the most common method used for treating cassiterite?
Last replied to by
Part 1 : All mineral separations, flowsheet developments and equipment selection are based on a good understanding of the mineralogy of the ore types you propose to treat. Gravity is a good selection ...
Part 1 : All mineral separations, flowsheet developments and equipment selection are based on a good understanding of the mineralogy of the ore types you propose to treat. Gravity is a good selection ...
2
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1262
VIEWS
Started by Tarun Karakoti
I am faced with a challenge of finding an appropriate sampling system that would work in a launder. There is limited space between the equipments that are connected by the launder. It has to be across.
I am faced with a challenge of finding an appropriate sampling system that would work in a launder. There is limited space between the equipments that are connected by the launder. It has to be across.
Last replied to by Obersturmbann
If the sample is for metal accounting, consider dropping the flow into a sump and pumping back to the second vessel and using a proper cross-stream sampler. If it is a process control sample, you can ...
If the sample is for metal accounting, consider dropping the flow into a sump and pumping back to the second vessel and using a proper cross-stream sampler. If it is a process control sample, you can ...
12
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5402
VIEWS
Started by Bob Mathias
I've seen a few cases in the last few years where AAS samples and assays are understating the gold content in sulphide related mineralisation. Clearly some of the problem is related to the incomplete extraction of the gold by digestion but I'm wonder...
I've seen a few cases in the last few years where AAS samples and assays are understating the gold content in sulphide related mineralisation. Clearly some of the problem is related to the incomplete extraction of the gold by digestion but I'm wonder...
Last replied to by
Normally the gold in sulphides is associated to the number of gold particles in the selected portion for analysis, the probability to have a representative number of particles on a portion of sample l...
Normally the gold in sulphides is associated to the number of gold particles in the selected portion for analysis, the probability to have a representative number of particles on a portion of sample l...
10
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2805
VIEWS
Started by
I'm looking for some opinions and experiences as to the most reliable methods of determining sulphide-sulphur (in pyrite, arsenopyrite and so as opposed to sulphate sulphur) and carbon in carbonate versus organic carbon in rock materials. What sampli...
I'm looking for some opinions and experiences as to the most reliable methods of determining sulphide-sulphur (in pyrite, arsenopyrite and so as opposed to sulphate sulphur) and carbon in carbonate versus organic carbon in rock materials. What sampli...
Last replied to by Marshal Meru
By reading the various comments I didn't read a mention to the theory and practice of sampling by Pierre GY.Least of you certainly have heard or read some sampling documents.Nets about what Pierre GY ...
By reading the various comments I didn't read a mention to the theory and practice of sampling by Pierre GY.Least of you certainly have heard or read some sampling documents.Nets about what Pierre GY ...
11
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2435
VIEWS
Started by Victor Bergman
I am trying to determine the cause of errors in analysis of iron ore standards where the analytical technique involves lithium borate fusion followed by ICP-AES. Manufacturers of the standards specified they must be oven dried prior to fusion to avoi...
I am trying to determine the cause of errors in analysis of iron ore standards where the analytical technique involves lithium borate fusion followed by ICP-AES. Manufacturers of the standards specified they must be oven dried prior to fusion to avoi...
Last replied to by
The ASTM moisture method that specifies appropriate drying temperature is ASTM D2216-10. Perhaps ASTM has details supporting their specified temperature within their development history. I am not awar...
The ASTM moisture method that specifies appropriate drying temperature is ASTM D2216-10. Perhaps ASTM has details supporting their specified temperature within their development history. I am not awar...
19
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3839
VIEWS
Started by Raje Singh
Would you recommend sending samples from the same prospect to two different laboratories for the same analysis because of time constrain? Any QC implication!
Would you recommend sending samples from the same prospect to two different laboratories for the same analysis because of time constrain? Any QC implication!
Last replied to by Sudhirkumar
Before sending samples to two separate labs, you will want to have done QA/QC checks on them. Both will have slightly different results due to their own errors. In the past, we have done round robin c...
Before sending samples to two separate labs, you will want to have done QA/QC checks on them. Both will have slightly different results due to their own errors. In the past, we have done round robin c...
6
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2648
VIEWS
Started by
Anyone have experience at removing flake mica from small scale (10-20tph ROM), after scrubber, before jig. I once saw a (South African) machine to do this, called a 'reverse spiral classifier'. A drum, 1.5 or 2m in diameter, 3-4m in length, with a fl...
Anyone have experience at removing flake mica from small scale (10-20tph ROM), after scrubber, before jig. I once saw a (South African) machine to do this, called a 'reverse spiral classifier'. A drum, 1.5 or 2m in diameter, 3-4m in length, with a fl...
Last replied to by Helena Russell
I agree with you, up-current classification is likely to produce the most consistent results. Get in contact with Nagrom in Western Australia as they have done a lot of work removing mica from spodume...
I agree with you, up-current classification is likely to produce the most consistent results. Get in contact with Nagrom in Western Australia as they have done a lot of work removing mica from spodume...
7
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4665
VIEWS
Started by
Does anyone have specific experience with a successful method of sampling a pile of material for contained metal which may cover from a few hundred to several hundred square meters in plan range and depth from 3 to 30 m? I have been through this exer...
Does anyone have specific experience with a successful method of sampling a pile of material for contained metal which may cover from a few hundred to several hundred square meters in plan range and depth from 3 to 30 m? I have been through this exer...
Last replied to by Paul Morrow
Whatever you do short of reprocessing and using correct belt or slurry samplers will have inaccuracies. Take the company accountant with you when you try to sample the pile and convince them of the ne...
Whatever you do short of reprocessing and using correct belt or slurry samplers will have inaccuracies. Take the company accountant with you when you try to sample the pile and convince them of the ne...
8
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1736
VIEWS
Started by Unterstarm
Given that the sampling variability is likely to be up to 2 orders of magnitude greater than any analytical error then do we need spend 2 orders of magnitude more on sampling devices in the plant than on the analytical tools (e.g. ICP-MS) that we’r...
Given that the sampling variability is likely to be up to 2 orders of magnitude greater than any analytical error then do we need spend 2 orders of magnitude more on sampling devices in the plant than on the analytical tools (e.g. ICP-MS) that we’r...
Last replied to by Helena Russell
One issue in this context is to make a cost study, where you compare the costs for a sampling system versus the cost for the "human sampling" when taking in account the possible production losses and ...
One issue in this context is to make a cost study, where you compare the costs for a sampling system versus the cost for the "human sampling" when taking in account the possible production losses and ...
8
REPLIES
1891
VIEWS
Started by Tarun Karakoti
Stream sediment samples of 0.5g analysed for gold using ME-MS41L ICPMS seem dismal w.r.t. previous results for the same area. Thinking of reanalysing! Any advice on sample size or analytical technique
Stream sediment samples of 0.5g analysed for gold using ME-MS41L ICPMS seem dismal w.r.t. previous results for the same area. Thinking of reanalysing! Any advice on sample size or analytical technique
Last replied to by
Apologies for my large contribution, but was thinking about some old sediment data recently.In exploration, IMO, too much is often read into absolute values returned from stream sediment samples. Ther...
Apologies for my large contribution, but was thinking about some old sediment data recently.In exploration, IMO, too much is often read into absolute values returned from stream sediment samples. Ther...
10
REPLIES
1697
VIEWS
Started by Subhash-Kumar-Roy
Is there a standard practice or procedure for collection of sample of Nickel ore for ore grading purpose?
Is there a standard practice or procedure for collection of sample of Nickel ore for ore grading purpose?
Last replied to by Subhash-Kumar-Roy
Thanks for the clearance & assurance.
Thanks for the clearance & assurance.
10
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2480
VIEWS
Started by
Does anyone know of a commercially available source of certified reference materials (standards) for REE in the range of 100 - 50,000 ppm total REE?Ideally including elevated Cu, Au, Mo& U. The REE occur as carbonates and phosphates in an IOCG matrix...
Does anyone know of a commercially available source of certified reference materials (standards) for REE in the range of 100 - 50,000 ppm total REE?Ideally including elevated Cu, Au, Mo& U. The REE occur as carbonates and phosphates in an IOCG matrix...
Last replied to by
Thanks for all the replies, there is no need to comment further as I have found what I need.
Thanks for all the replies, there is no need to comment further as I have found what I need.
24
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4368
VIEWS
Started by Unterstarm
What is best practice when splitting a -80mesh fraction of stream sediment collected for gold analysis? Small riffle splitter, rotary splitting device (RSD) or other?The -80mesh fractions weigh up to several hundred grams and need splitting for a 50g...
What is best practice when splitting a -80mesh fraction of stream sediment collected for gold analysis? Small riffle splitter, rotary splitting device (RSD) or other?The -80mesh fractions weigh up to several hundred grams and need splitting for a 50g...
Last replied to by
Thank you for your kind comments. To answer your question in relation to figures, I suspect the reason for his 'better' rsd's was simply that he was working with a model two-component system (that als...
Thank you for your kind comments. To answer your question in relation to figures, I suspect the reason for his 'better' rsd's was simply that he was working with a model two-component system (that als...
7
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1544
VIEWS
Started by Tarun Karakoti
Please I want to know the methods that were being used manually to determine the quantity of gold in solution before the invention of the AAS machine.
Please I want to know the methods that were being used manually to determine the quantity of gold in solution before the invention of the AAS machine.
Last replied to by Bob Mathias
You can make a dish out of assay lead foil evaporate a weighed amount of solution in it then cupel the foil. The resulting gold bead can then be weighed. All these methods require good lab technique t...
You can make a dish out of assay lead foil evaporate a weighed amount of solution in it then cupel the foil. The resulting gold bead can then be weighed. All these methods require good lab technique t...
Thank you so much for posting this. It is most informative.We send a gravity concentrate offsite for high-intensity CN leaching and the offsite refiners sometimes have issues with high-iron pours as y...