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2644
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Started by Wadzanayi
I am currently working on a project to replace or find a cheaper alternative to Leach Aid during the intensive cyanidation of gold concentrates (Au 500-3,000 g/t, Ag 100-5,000 g/t).The intensive leaching of the gold concentrates is currently being ...
I am currently working on a project to replace or find a cheaper alternative to Leach Aid during the intensive cyanidation of gold concentrates (Au 500-3,000 g/t, Ag 100-5,000 g/t).The intensive leaching of the gold concentrates is currently being ...
Last replied to by Gene Cheeseman
Hi Bobin, We are currently doing an evaluation of our current practice of using peroxide and are considering switching to SeproLeach as well. We did four bottle rolls comparing oxygen, air, peroxid...
Hi Bobin, We are currently doing an evaluation of our current practice of using peroxide and are considering switching to SeproLeach as well. We did four bottle rolls comparing oxygen, air, peroxid...
2
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1837
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Started by Mpiga
hello friends,can some one help me a formula to calculate the capacity( in tons) of the round VAT leaching tank,also what are the indicators to show that the carbon is full,that need to be replaced? Thanks in advance.
hello friends,can some one help me a formula to calculate the capacity( in tons) of the round VAT leaching tank,also what are the indicators to show that the carbon is full,that need to be replaced? Thanks in advance.
Last replied to by Alex Spynu
For CIP and CIL tanks you can take operating volume about 90-95% of overall volume. Nobody determine is it full carbon or not by any indicators. There are precise time and volume when you should tr...
For CIP and CIL tanks you can take operating volume about 90-95% of overall volume. Nobody determine is it full carbon or not by any indicators. There are precise time and volume when you should tr...
1
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1240
VIEWS
Started by hasliclimber
Hello everybody. I’m working in the probably smallest zinc facility of the world… We do Zn recycling from fly ash of an incineration plant, means 100% secondary input. The process is like this: leaching of fly ash with HCL > Cementation with Z...
Hello everybody. I’m working in the probably smallest zinc facility of the world… We do Zn recycling from fly ash of an incineration plant, means 100% secondary input. The process is like this: leaching of fly ash with HCL > Cementation with Z...
Last commented on by hasliclimber
Hi Justin. Thanks for your quick answer! 1) No. The NaOH is added in the mixer directly. I will have a look on this idea! 2) Yes. Iron content is around 2 mg/L by entering the SX. 3) Yes we do. Moreo...
Hi Justin. Thanks for your quick answer! 1) No. The NaOH is added in the mixer directly. I will have a look on this idea! 2) Yes. Iron content is around 2 mg/L by entering the SX. 3) Yes we do. Moreo...
2
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1378
VIEWS
Started by jovanifirebird
hi guys. i work in a gold processing plant. we are facing with some issues. carbon started to go down while density was high( 46%). at the top, carbon is very less, while at the bottom, its high. in my point of view carbon can only go down when den...
hi guys. i work in a gold processing plant. we are facing with some issues. carbon started to go down while density was high( 46%). at the top, carbon is very less, while at the bottom, its high. in my point of view carbon can only go down when den...
Last commented on by jovanifirebird
Hi Rahil. Thanks for the reply. Definitely agree with you. The tanks are homoginized well. Density at the top and down the tanks are same. 46-47%. Yet most of the carbon is still down. Carbon is not ...
Hi Rahil. Thanks for the reply. Definitely agree with you. The tanks are homoginized well. Density at the top and down the tanks are same. 46-47%. Yet most of the carbon is still down. Carbon is not ...
4
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1323
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Started by Mpiga
Hi, i am currently operating a vat leaching. The soil sample results was 6 ppm of Au and 8579 ppm of Cu. After running for two days the solution showed the following results: Cu 725 ppm and 2.53 ppm. The carbon samples result showed Au 544 ppm and Cu...
Hi, i am currently operating a vat leaching. The soil sample results was 6 ppm of Au and 8579 ppm of Cu. After running for two days the solution showed the following results: Cu 725 ppm and 2.53 ppm. The carbon samples result showed Au 544 ppm and Cu...
2
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1629
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Started by HKen Erno
Hello dear metallurgists! I will be gratefull if you help please, to find how to optimize the consumption of reagents such as water, cyanide, soda cautic and leach aid in a plan of intensive leach with a tonnage of 12 tons of concentrates. Thank yo...
Hello dear metallurgists! I will be gratefull if you help please, to find how to optimize the consumption of reagents such as water, cyanide, soda cautic and leach aid in a plan of intensive leach with a tonnage of 12 tons of concentrates. Thank yo...
Last replied to by GregRasmussen
Hi HKen Erno, Can you tell me about the ILR equipment you are working with. The ILR supplied by Gekko does not require Leach Aid. Is this a gravity or flotation concentrate? Here are some guidel...
Hi HKen Erno, Can you tell me about the ILR equipment you are working with. The ILR supplied by Gekko does not require Leach Aid. Is this a gravity or flotation concentrate? Here are some guidel...
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2532
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Started by sherafat71
Hi cold beta purification process is remove cobalt from zinc sulphate solution by 1-nitroso2-naphthol or alfanitroso betanaphthol. in this process organic in solution remove by charcoal but organic compound exist in solution yet that effect in elect...
Hi cold beta purification process is remove cobalt from zinc sulphate solution by 1-nitroso2-naphthol or alfanitroso betanaphthol. in this process organic in solution remove by charcoal but organic compound exist in solution yet that effect in elect...
1
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1273
VIEWS
Started by Sikini Nyakisinda
Hello fello Metallurgist, i am facing one critical problem in our Process Plant though we have very poor grinding manual due to absence of liners and lifters to be replaced in the Mill as well as Pebble crusher for recycled scats and Cyclone Cluster ...
Hello fello Metallurgist, i am facing one critical problem in our Process Plant though we have very poor grinding manual due to absence of liners and lifters to be replaced in the Mill as well as Pebble crusher for recycled scats and Cyclone Cluster ...
1
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1418
VIEWS
Started by epiphane
HelloI want to study on the efficiency of the transfer of carbon inter tank at the level of the CIL. What are the different settings I can perform to have concentrations conforming to the set-point?
HelloI want to study on the efficiency of the transfer of carbon inter tank at the level of the CIL. What are the different settings I can perform to have concentrations conforming to the set-point?
2
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1469
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Started by Philibert
I have been leaching gold ore which have also copper and Silver by using carbon in leach (CIC) leaching method. when i take pregnant carbon to elution at the end i found large amount of copper and silver, this means cyanide also dissolved silver and ...
I have been leaching gold ore which have also copper and Silver by using carbon in leach (CIC) leaching method. when i take pregnant carbon to elution at the end i found large amount of copper and silver, this means cyanide also dissolved silver and ...
1
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1436
VIEWS
Started by Ron G
I read David's excellent article Jan-2017 on various methods of gold recovery from cyanide leach here: https://www.911metallurgist.com/cyanide-chemistry-gold-extraction/ I am a gold electroplater and was particularly interested in the cuprous ion...
I read David's excellent article Jan-2017 on various methods of gold recovery from cyanide leach here: https://www.911metallurgist.com/cyanide-chemistry-gold-extraction/ I am a gold electroplater and was particularly interested in the cuprous ion...
4
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1676
VIEWS
Started by Trajork
I recently read that sodium thiosulfate can be used for gold and silver leaching in much the same way as cyanide, but with no worries about toxicity. This intrigues me: aqua regia is a pain to work with, and cyanide is too toxic for an amateur, but t...
I recently read that sodium thiosulfate can be used for gold and silver leaching in much the same way as cyanide, but with no worries about toxicity. This intrigues me: aqua regia is a pain to work with, and cyanide is too toxic for an amateur, but t...
1
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1314
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Started by Samuel Trindade
Dear All, I conducted some carbon activity tests but I'd like to test the desorption capacity of carbon from different suppliers. Could you guys help-me how to do that? Is there any procedure? Thank you in advance!
Dear All, I conducted some carbon activity tests but I'd like to test the desorption capacity of carbon from different suppliers. Could you guys help-me how to do that? Is there any procedure? Thank you in advance!
1
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1229
VIEWS
Started by 15uzu
do any one have any useful information about extraction of yttrium from xenotime
do any one have any useful information about extraction of yttrium from xenotime
Last replied to by Cyril Bourget
May I know the origin and composition of the xenotime ore as well as the name of the company that owns the project ? Are we talking about leaching and/or solvent extraction of yttrium ?
May I know the origin and composition of the xenotime ore as well as the name of the company that owns the project ? Are we talking about leaching and/or solvent extraction of yttrium ?
4
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1700
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Started by John KK
Dear All We running gold plant (CIL) we have a problem during GIC end month inventory we always get 15-20 unaccounted gain or loss which is very difficult .The gold is hosted as free gold by quartz-sulfide vein in altered microgranite, with minor go...
Dear All We running gold plant (CIL) we have a problem during GIC end month inventory we always get 15-20 unaccounted gain or loss which is very difficult .The gold is hosted as free gold by quartz-sulfide vein in altered microgranite, with minor go...
1
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1102
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Started by Lina Avila
Hi i would like to ask about which material should i use for this application is it better Titanium or can I go with 17-4 PH
Hi i would like to ask about which material should i use for this application is it better Titanium or can I go with 17-4 PH
1
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1392
VIEWS
Started by Philibert
I would like to thanks for all members for technical support that they give to every question I want to start a new Vant leaching plant with one leaching tank and have a barren tank of 2000 liter, i would like to to operate the process at 900ppm of ...
I would like to thanks for all members for technical support that they give to every question I want to start a new Vant leaching plant with one leaching tank and have a barren tank of 2000 liter, i would like to to operate the process at 900ppm of ...
2
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1553
VIEWS
Started by kbob
I have a leach solution generated from a sulphide ore that is rich in iron with some copper (about 2%) and cobalt (bout 0.2%). What is the best way to isolate and form a cobalt product from this solution.
I have a leach solution generated from a sulphide ore that is rich in iron with some copper (about 2%) and cobalt (bout 0.2%). What is the best way to isolate and form a cobalt product from this solution.
2
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1353
VIEWS
Started by Aliarsen
I've been working on steel slag and sometimes the solution of leaching get gelated and crystalized?
I've been working on steel slag and sometimes the solution of leaching get gelated and crystalized?
Last replied to by kevinextraction
The analysis of this kind gel will help you to find the reason. Commonly, like Siddingquf said, the sillica gel may be one key factor. Looking forward to hearing more updates.
The analysis of this kind gel will help you to find the reason. Commonly, like Siddingquf said, the sillica gel may be one key factor. Looking forward to hearing more updates.
1
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1759
VIEWS
Started by jtval
Hi About POX for treatment of refractory gold ore, considering that using only one autoclave can decrease the availability of the process plant, how many autoclaves should be used in POX process? Thanks for the help.
Hi About POX for treatment of refractory gold ore, considering that using only one autoclave can decrease the availability of the process plant, how many autoclaves should be used in POX process? Thanks for the help.
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1559
VIEWS
Started by mokhtaraazami
Hi as you know one of the method for treatment of refractory gold ore is POX. could you please explain about the limitation of S content in the concentrate? because I found in a Chinese text that the maximum content of S in the sulfide concentrate...
Hi as you know one of the method for treatment of refractory gold ore is POX. could you please explain about the limitation of S content in the concentrate? because I found in a Chinese text that the maximum content of S in the sulfide concentrate...
1
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1141
VIEWS
Started by CigdemC
We are not sure the stability of the heap if we use agglomerated ore as overliner.
We are not sure the stability of the heap if we use agglomerated ore as overliner.
3
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6557
VIEWS
Started by Devon2017
I have many kg of high grade pyrite/freegold concentrate, under microscope the sample looks amazing, I took 1 cup of nitric acid and a teaspoon of roasted concentrate and the pyrite has only half dissolved and no chemical reaction is happening anymor...
I have many kg of high grade pyrite/freegold concentrate, under microscope the sample looks amazing, I took 1 cup of nitric acid and a teaspoon of roasted concentrate and the pyrite has only half dissolved and no chemical reaction is happening anymor...
1
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1260
VIEWS
Started by Laurian Henry
Hi metallurgists, I want to model a cyanide gold leaching plant, please help me to understand the key components to consider when modelling leaching plant (it 's going to be my first model). Thank you all in advance
Hi metallurgists, I want to model a cyanide gold leaching plant, please help me to understand the key components to consider when modelling leaching plant (it 's going to be my first model). Thank you all in advance
Last commented on by Laurian Henry
No Sir, I don't
No Sir, I don't
5
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2682
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Started by Metals Guy
Hie guys. I am having problems with the amount of copper associated with our ore. The copper content is not high enough for economic recovery but its high enough to cause problems in our CIP circuit and electrowinning. A typical elution would produc...
Hie guys. I am having problems with the amount of copper associated with our ore. The copper content is not high enough for economic recovery but its high enough to cause problems in our CIP circuit and electrowinning. A typical elution would produc...
Last commented on by Metals Guy
Thanks Mohammed
Thanks Mohammed
2
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1295
VIEWS
Started by Hamid2017
Hi guys In a gold plant, the EW circuit efficiency is low, it is suspected that it is due to higher concentration of chlorine in the solution. any article or plant experience addressing this issue and suggesting any solution? your help will be highl...
Hi guys In a gold plant, the EW circuit efficiency is low, it is suspected that it is due to higher concentration of chlorine in the solution. any article or plant experience addressing this issue and suggesting any solution? your help will be highl...
2
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1263
VIEWS
Started by tesaygo1
Our country has alot of source of gold-copper ore. But no one attempt to try new technique to process to recover gold on a high gold+copper ore. Most people in my country only know how to recover gold using MERCURY, AND FEW our CYANIDING. I only know...
Our country has alot of source of gold-copper ore. But no one attempt to try new technique to process to recover gold on a high gold+copper ore. Most people in my country only know how to recover gold using MERCURY, AND FEW our CYANIDING. I only know...
2
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2941
VIEWS
Started by NathanT
I am wondering if anyone has done any residence time testing on any leach circuits or tanks and has any advice they could supply. We are planning to do a residence time test on our leaching circuit shortly and have ordered Azorubine (basically powd...
I am wondering if anyone has done any residence time testing on any leach circuits or tanks and has any advice they could supply. We are planning to do a residence time test on our leaching circuit shortly and have ordered Azorubine (basically powd...
1
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2055
VIEWS
Started by SUPERSX
I need to design a mixer settler for 10m3/Hr emulsion flow rate pl. any body suggest the design calculations. regards, Vijay
I need to design a mixer settler for 10m3/Hr emulsion flow rate pl. any body suggest the design calculations. regards, Vijay
2
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1287
VIEWS
Started by CA
We've recently encountered some problems with electrowinning from carbon that has high Hg loadings. We are doing an alcohol Zadra strip with carbon loaded from a non-cyanide leach. When using alcohol, we usually see high Au recoveries within 24h...
We've recently encountered some problems with electrowinning from carbon that has high Hg loadings. We are doing an alcohol Zadra strip with carbon loaded from a non-cyanide leach. When using alcohol, we usually see high Au recoveries within 24h...
1
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1258
VIEWS
Started by John R
I am compiling some data on Merrill Crowe circuits and are interested in how much zinc dissolves. I would expect zinc to go into solution as gold and silver are precipitated stoichiometrically, but generally a large excess of zinc is added. Ge...
I am compiling some data on Merrill Crowe circuits and are interested in how much zinc dissolves. I would expect zinc to go into solution as gold and silver are precipitated stoichiometrically, but generally a large excess of zinc is added. Ge...
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