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Started by Eng. Fwego
Am operating CIP gold recovery circuit by cyanidation but concentration of free cyanide in the last tank is 260 which is higher than that of the first tank (210). Why is this happening?
Am operating CIP gold recovery circuit by cyanidation but concentration of free cyanide in the last tank is 260 which is higher than that of the first tank (210). Why is this happening?
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103
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1848
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Started by BrendonTop
Hi guys, so we are having issues with stibnite at our Biox section since it is exceeding the 3% which the bacteria can handle so now it'smore of a toxin. So we want to pretreat the ore before sending it to the Biox plant. The pretreatment was to be d...
Hi guys, so we are having issues with stibnite at our Biox section since it is exceeding the 3% which the bacteria can handle so now it'smore of a toxin. So we want to pretreat the ore before sending it to the Biox plant. The pretreatment was to be d...
Last commented on by BrendonTop
Thank you Jorge. Do you have the parameters you used for the Ferric chloride? If you do can you please share.
Thank you Jorge. Do you have the parameters you used for the Ferric chloride? If you do can you please share.
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155
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Started by BrendonTop
Want to remove stibnite from my ore as it is acting as a toxin at the Biox plant. Leaching using Ferric chloride or sodium sulphide are the options.What are the parameters(pH, residence time,temperature, liquid-solid ratio etc) for leaching antimony ...
Want to remove stibnite from my ore as it is acting as a toxin at the Biox plant. Leaching using Ferric chloride or sodium sulphide are the options.What are the parameters(pH, residence time,temperature, liquid-solid ratio etc) for leaching antimony ...
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164
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Started by hydrometallurgictest
Good morning. I am currently working on a project with extremely fine ore, which comes from flotation concentrate. Feed content around 20-50g/t gold, with average tank coal concentration of 100-120mL/L. There is a concentration of around 2-3% of tot...
Good morning. I am currently working on a project with extremely fine ore, which comes from flotation concentrate. Feed content around 20-50g/t gold, with average tank coal concentration of 100-120mL/L. There is a concentration of around 2-3% of tot...
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230
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Started by EAKUVI
Hello Please what are the possible causes of high solid tails
Hello Please what are the possible causes of high solid tails
Last commented on by Samuel Trindade
I think he might be asking about high grade solid tails.
I think he might be asking about high grade solid tails.
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238
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Started by Michaelmc
Hey guys, been having issues with our elution circuit, we have been having high barren carbon results (150 a 400ppm) from loaded carbons anywhere between 900 - 1300ppm, have exhausted all potential ideas caustic, cyanide, ph, flow rate, temperature...
Hey guys, been having issues with our elution circuit, we have been having high barren carbon results (150 a 400ppm) from loaded carbons anywhere between 900 - 1300ppm, have exhausted all potential ideas caustic, cyanide, ph, flow rate, temperature...
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239
VIEWS
Started by ambblanks
Do you have any suggestion on how I can minimize the production of Fine Carbon in CIP-AARL Elution during Gold Extraction? Also, does anyone have any related literature about economical treatment of Fine Carbon instead of just discarding it?
Do you have any suggestion on how I can minimize the production of Fine Carbon in CIP-AARL Elution during Gold Extraction? Also, does anyone have any related literature about economical treatment of Fine Carbon instead of just discarding it?
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255
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Started by Eng. Cosmas Wambura
Hello, wish you are doing well I need to understand, which chemical I can use to treat zinc-bearing minerals on the gold vat-leaching and how is utilized
Hello, wish you are doing well I need to understand, which chemical I can use to treat zinc-bearing minerals on the gold vat-leaching and how is utilized
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221
VIEWS
Started by ichigo2785
Hello, I found an old data set for an oxygen uptake rate test for a sample at 45% solids. pH was modified to 10 from 8 using lime addtion, NaCN addition was 0.1% w/v. Air was the gas sparged through and sample was prepared to P80 70um. The test was ...
Hello, I found an old data set for an oxygen uptake rate test for a sample at 45% solids. pH was modified to 10 from 8 using lime addtion, NaCN addition was 0.1% w/v. Air was the gas sparged through and sample was prepared to P80 70um. The test was ...
1
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240
VIEWS
Started by Blackkaiser
*sizing of CIP agitated tanks *ore is from a dump of 2-3g/t *I need a complete flowsheet for the design
*sizing of CIP agitated tanks *ore is from a dump of 2-3g/t *I need a complete flowsheet for the design
Last replied to by Mike
Start here: https://about.citiprogram.org/course/comprehensive-cip-course-for-advanced-learners/ Depending on your experience level you may need some other sourses. Of course this might be some help...
Start here: https://about.citiprogram.org/course/comprehensive-cip-course-for-advanced-learners/ Depending on your experience level you may need some other sourses. Of course this might be some help...
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305
VIEWS
Started by Sheila reid
Trying to find out the effectiveness of using a tube retort for recovering gold from mercury amalgam.The link below shows an image. Im also having problems finding one to purchase https://imgur.com/a/xEGyR1y
Trying to find out the effectiveness of using a tube retort for recovering gold from mercury amalgam.The link below shows an image. Im also having problems finding one to purchase https://imgur.com/a/xEGyR1y
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311
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Started by Nasirali111
I have gold ore which I finely grinded to powder form. I then added aqua regia in it and let it complete the digestion process. Afterwards I filtered this solution twice to get absolutely clear liquid. I then added caustic soda in excess In it and le...
I have gold ore which I finely grinded to powder form. I then added aqua regia in it and let it complete the digestion process. Afterwards I filtered this solution twice to get absolutely clear liquid. I then added caustic soda in excess In it and le...
Last replied to by Jorge
Follow the links below,
Follow the links below,
Laboratory Testing & General Mineral Processing Engineering
Gold Refining Process by Aqua Regia
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347
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Started by Eng. Cosmas Wambura
Ammonium Nitrate is among of chemicals used to control copper in gold vat leaching, so I wish to know how to use it. The capacity of a single tank is 40t.
Ammonium Nitrate is among of chemicals used to control copper in gold vat leaching, so I wish to know how to use it. The capacity of a single tank is 40t.
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483
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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?
Last commented on by Eng. Cosmas Wambura
Can these arsenic minerals affect the recovery of gold?
Can these arsenic minerals affect the recovery of gold?
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296
VIEWS
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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310
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Started by John KK
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 Mike
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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343
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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 Mike
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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446
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Started by John KK
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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458
VIEWS
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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483
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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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485
VIEWS
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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539
VIEWS
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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511
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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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592
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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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576
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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 Mike
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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Dears, good day. Fwego, what is the sample titration method? The gap between analyzes has a value that may have caused some interference in the titration. In the intermediate tanks, what is the cyani...