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17
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Started by GylcineLeacher
Processing of gold/silver tellurides is well documented in operations such as Emperor Mine in Fiji, Kalgoolie in Australia and Cripple Creek in Colorado, USA. Although all of these operations initially utilized roasting, in today’s world it certain...
Processing of gold/silver tellurides is well documented in operations such as Emperor Mine in Fiji, Kalgoolie in Australia and Cripple Creek in Colorado, USA. Although all of these operations initially utilized roasting, in today’s world it certain...
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584
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Started by Eng. Cosmas Wambura
Controlling Copper is a big problem at my site, so I need help on which reagent can I use in the cyanidation of gold. Which reagent can I apply to control Copper in old vat leaching?
Controlling Copper is a big problem at my site, so I need help on which reagent can I use in the cyanidation of gold. Which reagent can I apply to control Copper in old vat leaching?
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201
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32
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Started by Adimulu
In six months, we are going to start getting gold ore from underground mining which is an extension of open-cast mining. There was no metallurgical test conducted on the variability of the ore that is planned to feed to the Process Plant on the assum...
In six months, we are going to start getting gold ore from underground mining which is an extension of open-cast mining. There was no metallurgical test conducted on the variability of the ore that is planned to feed to the Process Plant on the assum...
Last replied to by SmartDog
Since you are posting in the hydrometallurgy section an assumption would be that your process is hydrometallurgical, if not what is it? Going frpom that point, a key difference will be ore grade. M...
Since you are posting in the hydrometallurgy section an assumption would be that your process is hydrometallurgical, if not what is it? Going frpom that point, a key difference will be ore grade. M...
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314
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Started by idahalen
I am currently researching Nickel hydrometallurgy and I am looking to understand the hazards on a HPAL circuit, specifically the Fleaters and Autoclaves. I understand that under certain conditions autoclaves can explode but I do not see how this ca...
I am currently researching Nickel hydrometallurgy and I am looking to understand the hazards on a HPAL circuit, specifically the Fleaters and Autoclaves. I understand that under certain conditions autoclaves can explode but I do not see how this ca...
Last replied to by idahalen
belated thanks SmartDog. I guess the hint is the presence of safety valves. I have modelled a deflagration at operating pressures at varying free-volumes - quite significant collateral damage. T...
belated thanks SmartDog. I guess the hint is the presence of safety valves. I have modelled a deflagration at operating pressures at varying free-volumes - quite significant collateral damage. T...
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52
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Started by EAKUVI
Does carbon sink in the tanks with increasing densities or decreasing densities
Does carbon sink in the tanks with increasing densities or decreasing densities
Last replied to by SmartDog
Normally the tanks are agitated to keep everything in suspension and well mixed. So relative settling is not an issue. If the agitation is stopped, everything will sink with large heavy particles sin...
Normally the tanks are agitated to keep everything in suspension and well mixed. So relative settling is not an issue. If the agitation is stopped, everything will sink with large heavy particles sin...
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346
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Started by Anudari
Hello all, I am working as a metallurgist first time after graduation in Gold processing company. But I have learned that this processing plant has many issues that needs to be solved immediately. Because the plant does not have waste pond or someth...
Hello all, I am working as a metallurgist first time after graduation in Gold processing company. But I have learned that this processing plant has many issues that needs to be solved immediately. Because the plant does not have waste pond or someth...
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312
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152
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Started by Adimulu
Hello everyone We are running CIL tanks with under-designed impellers, and we are struggling to keep the material suspended. To help the agitation we are pumping high airflow through the shaft, but the result is not promising. Does the airflow help ...
Hello everyone We are running CIL tanks with under-designed impellers, and we are struggling to keep the material suspended. To help the agitation we are pumping high airflow through the shaft, but the result is not promising. Does the airflow help ...
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179
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Started by Rutendo Praise
I have a few tons of china clay, and a sample showed good results, but then the clay is fine and may give me problems processing it. Is heap leaching the best way to have the highest recovery?
I have a few tons of china clay, and a sample showed good results, but then the clay is fine and may give me problems processing it. Is heap leaching the best way to have the highest recovery?
Last commented on by Rutendo Praise
Thank you
Thank you
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192
VIEWS
Started by Ajouhi
We operate a CIL plant (8000 t/d), we recover fine carbon after elution and regeneration. I am concerned that the fine carbon recovered after screening the regenerated carbon has a higher grade (1000 ppm) compared to the eluted sterile carbon (100 pp...
We operate a CIL plant (8000 t/d), we recover fine carbon after elution and regeneration. I am concerned that the fine carbon recovered after screening the regenerated carbon has a higher grade (1000 ppm) compared to the eluted sterile carbon (100 pp...
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196
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Started by Metallurgystudent
Good day to all! Please provide a hand. What is the most secure way to separate iridium from osmium metal?
Good day to all! Please provide a hand. What is the most secure way to separate iridium from osmium metal?
Last commented on by Metallurgystudent
Thanks a lot for your help.
Thanks a lot for your help.
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186
VIEWS
Started by ecublens
Hello, there is some arsenic in an oxidized gold ore analysis. It is not in the form of arsenopyrite. I thought it was acting with antimony, but the Sb content is also very low. Could you give an idea what the arsenic here might be acting with?
Hello, there is some arsenic in an oxidized gold ore analysis. It is not in the form of arsenopyrite. I thought it was acting with antimony, but the Sb content is also very low. Could you give an idea what the arsenic here might be acting with?
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232
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Started by simon@p
Hello. There is a batch agitation tank that we are operating as a pilot for our ore. The problem is that we have been getting a problem of inconsistence in carbon results as they may reach example 380 Au ppm then later on with a good recovery fro...
Hello. There is a batch agitation tank that we are operating as a pilot for our ore. The problem is that we have been getting a problem of inconsistence in carbon results as they may reach example 380 Au ppm then later on with a good recovery fro...
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210
VIEWS
Started by canerdogan
Hi, How to i know the ore is calcined or not at the roasting stage before heap leach process.
Hi, How to i know the ore is calcined or not at the roasting stage before heap leach process.
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212
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Started by ecublens
Hello, How can we calculate the amount of cyanide (g) that needs to be added after titration in the bottle roll test?
Hello, How can we calculate the amount of cyanide (g) that needs to be added after titration in the bottle roll test?
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250
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Started by ecublens
Hello, I need a procedure that explains how to do the cyanide column leach test in detail. I would appreciate it if you could share it with me.
Hello, I need a procedure that explains how to do the cyanide column leach test in detail. I would appreciate it if you could share it with me.
Last replied to by SmartDog
A quick search of this site (outside the forum area) will provide most of the test procedures you are looking for, such as https://www.911metallurgist.com/blog/column-leaching-procedure
A quick search of this site (outside the forum area) will provide most of the test procedures you are looking for, such as https://www.911metallurgist.com/blog/column-leaching-procedure
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462
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Started by pz
Hi everyone. I wonder how is oxidizing gas (O2/air) flow rate is calculated for the atmospheric cyanide leach. I have experience with pressure oxidation of sulfides. The calculation method is very straightforward. First – calculate stoichiometric ...
Hi everyone. I wonder how is oxidizing gas (O2/air) flow rate is calculated for the atmospheric cyanide leach. I have experience with pressure oxidation of sulfides. The calculation method is very straightforward. First – calculate stoichiometric ...
Last commented on by SmartDog
Depends on tank size, particle size, solids concentration, agitator size, agitator blad configuration, and agitator transmission/belting. Also wether you are trying for high shear or low shear mixing...
Depends on tank size, particle size, solids concentration, agitator size, agitator blad configuration, and agitator transmission/belting. Also wether you are trying for high shear or low shear mixing...
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308
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Started by saeidar
Hi everyone. I want to remove Strontium from barite ore. I would appreciate if you help me in this regard.
Hi everyone. I want to remove Strontium from barite ore. I would appreciate if you help me in this regard.
Last replied to by Wieslaw Wodecki
Dzień dobry. Jaki minerał tworzy Sr w tym barycie i ile go tam jest. Pozdrawiam Wiesław
Dzień dobry. Jaki minerał tworzy Sr w tym barycie i ile go tam jest. Pozdrawiam Wiesław
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4609
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Started by simon@p
I would like to ask about the state of gold in eluant and it's chemical formula if any
I would like to ask about the state of gold in eluant and it's chemical formula if any
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434
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Started by Eng. Cosmas Wambura
Hello Friends, some one help me the way to obtain the tonnage of round vat tank; As i know; Vol. = (pi*D²*Height)/4 To obtain mass , i use Density = mass/volume Now; if this formula is correct, what is the density of raw ore? Else; if it`s not...
Hello Friends, some one help me the way to obtain the tonnage of round vat tank; As i know; Vol. = (pi*D²*Height)/4 To obtain mass , i use Density = mass/volume Now; if this formula is correct, what is the density of raw ore? Else; if it`s not...
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359
VIEWS
Started by graeme23miller
i am looking for anyone with experience in selecting materials of construction in high concentration chloride brine. we are doing a class 5 feasibility study without any corrosion test work. as a result the selection of materials are generally non-...
i am looking for anyone with experience in selecting materials of construction in high concentration chloride brine. we are doing a class 5 feasibility study without any corrosion test work. as a result the selection of materials are generally non-...
Last replied to by SmartDog
Some of it comes around to the volume of material you will be handling on a hourly and daily basis. There are some ootb thoughts that can be used if proper care and thought is used. First though j...
Some of it comes around to the volume of material you will be handling on a hourly and daily basis. There are some ootb thoughts that can be used if proper care and thought is used. First though j...
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410
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Started by ManUtd67
What are the best options to prevent build up of sticky material in a drum agglomerator. This is an acid agglomerator. Build-up of a ring of material occurs part way down the agglomerator between the acid spray pipe and the water spray pipe. (See...
What are the best options to prevent build up of sticky material in a drum agglomerator. This is an acid agglomerator. Build-up of a ring of material occurs part way down the agglomerator between the acid spray pipe and the water spray pipe. (See...
Last replied to by graeme23miller
from the look of your agglomerator the water addition is too high=> very sticky materials and build up. this is due to the moisture addition being at or even slightly above the material max stickin...
from the look of your agglomerator the water addition is too high=> very sticky materials and build up. this is due to the moisture addition being at or even slightly above the material max stickin...
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362
VIEWS
Started by ecublens
Hi guys, what is the difference between activated carbon adsorption and zinc cementation (merrill crowe)? How are these methods selected in a newly established gold enrichment facility? Thank you
Hi guys, what is the difference between activated carbon adsorption and zinc cementation (merrill crowe)? How are these methods selected in a newly established gold enrichment facility? Thank you
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383
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Started by Austin Muvimi
Hi guys. May you please school me on how to culculate the optimum mechanical agitator rotation speed in gold CIP plants taking into consideration the tank size and pulp density Thanks in advance
Hi guys. May you please school me on how to culculate the optimum mechanical agitator rotation speed in gold CIP plants taking into consideration the tank size and pulp density Thanks in advance
Last replied to by SmartDog
The normal process is to use the coarsest particle size expected and then determining the minimal settling velocity for that size given the pulp specific gravity and partical specifc gravity. This g...
The normal process is to use the coarsest particle size expected and then determining the minimal settling velocity for that size given the pulp specific gravity and partical specifc gravity. This g...
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569
VIEWS
Started by CharlieAlAfensh
There is a solution that contains sodium chloride and potassium chloride, and we want to dissolve the largest possible amount of potassium chloride in the solution
There is a solution that contains sodium chloride and potassium chloride, and we want to dissolve the largest possible amount of potassium chloride in the solution
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367
VIEWS
Started by awunderl
Looking for any resources or research on chalcopyrite leaching for recovery vs particle size. Looking to see the effect of different particle size distributions on a copper recovery curve for run of mine material. Focusing on larger size fraction...
Looking for any resources or research on chalcopyrite leaching for recovery vs particle size. Looking to see the effect of different particle size distributions on a copper recovery curve for run of mine material. Focusing on larger size fraction...
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594
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Started by Fahmy
Hi guys, I’d like to know what does the blue color indicate in the barren solution from VAT leaching, plus excessive dropping of cyanide concentration, I understand this occurs from the presence of higher amounts of other metals in the ore, but I d...
Hi guys, I’d like to know what does the blue color indicate in the barren solution from VAT leaching, plus excessive dropping of cyanide concentration, I understand this occurs from the presence of higher amounts of other metals in the ore, but I d...
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411
VIEWS
Started by Crisady
Can you tank gold amalgamation tailings straight to the regrind and the to cip without passing through vat leach and still achieve the same recovery.Iam just brainstorming on ways to cut costs without losing my gold.Can someone assist from experience...
Can you tank gold amalgamation tailings straight to the regrind and the to cip without passing through vat leach and still achieve the same recovery.Iam just brainstorming on ways to cut costs without losing my gold.Can someone assist from experience...
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398
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Started by ca1
Hello, We operate a small carbon in pulp plant without thermal reactivation abilities. We would like to find solutions to recover our process solution after it has been discharged to the tailings. Are anionic flocculants considered to be pore b...
Hello, We operate a small carbon in pulp plant without thermal reactivation abilities. We would like to find solutions to recover our process solution after it has been discharged to the tailings. Are anionic flocculants considered to be pore b...
Last replied to by SmartDog
As operations move to closed water circuits, matching the right flocculent to the leach circuit is an important issue. The chemistry of the whole process can become rather complex. While the flocculen...
As operations move to closed water circuits, matching the right flocculent to the leach circuit is an important issue. The chemistry of the whole process can become rather complex. While the flocculen...
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523
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Started by DY
Hello, All I can't find optimal solid / liquid ratio for processes intensive gold cyanidation at Consep Acacia unit, Gekko Inline Leach Reactor and Sepro Leach Reactor. Where I can find this information? May be somebody know this information.
Hello, All I can't find optimal solid / liquid ratio for processes intensive gold cyanidation at Consep Acacia unit, Gekko Inline Leach Reactor and Sepro Leach Reactor. Where I can find this information? May be somebody know this information.
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638
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Started by Seeker
I want to recover ruthenium metal from ruthenium hydroxide. Ruthenium hydroxide reaction with nitric acid gives ruthenium crystals and some part of it is dissolved in nitric acid. Would it be correct if I first completely dissolve ruthenium hydroxide...
I want to recover ruthenium metal from ruthenium hydroxide. Ruthenium hydroxide reaction with nitric acid gives ruthenium crystals and some part of it is dissolved in nitric acid. Would it be correct if I first completely dissolve ruthenium hydroxide...
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Hi Oguzture One can also use a less "vicious" acid than Nitric. Thereafter, selective recovery is possible, which can give you the metals without any tin present. Regards Scotman