- To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN
- Use Add New Topic to ask a New Question/Discussion about Pyrometallurgy and Electrometallurgy.
- OR Select a Topic that Interests you.
- Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).
Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. - Use Add Comment = to comment on someone else’s Reply in an already active Topic/Discussion.
4
REPLIES
1644
VIEWS
Started by johnywhy
This question concerns the making of alloys for casting. I need a low-toxicity, low-melting point metal, to cast hardware parts. The parts must not crack under torque or impact, and should remain hard up to 100 deg C. My plan is to make a Tin/Bism...
This question concerns the making of alloys for casting. I need a low-toxicity, low-melting point metal, to cast hardware parts. The parts must not crack under torque or impact, and should remain hard up to 100 deg C. My plan is to make a Tin/Bism...
6
REPLIES
3552
VIEWS
Started by WildWestMining
Hello, I am an artisnal miner in northern Arizona and am having trouble fluxing a sulfide ore. The ore is composed mainly of arsenopyrite, pyrite, galena, and polybasite. There is minor barite present as well. The ore was crushed to 150 micron and ca...
Hello, I am an artisnal miner in northern Arizona and am having trouble fluxing a sulfide ore. The ore is composed mainly of arsenopyrite, pyrite, galena, and polybasite. There is minor barite present as well. The ore was crushed to 150 micron and ca...
Last replied to by DAlchemist
how much sulfur and arsenic are we talking about here? Percentages?
how much sulfur and arsenic are we talking about here? Percentages?
6
REPLIES
1784
VIEWS
Started by Teggry
Hi, Why is Lead Nitrate put into the Electrowinning cell before the electrowinning starts. What is its purpose? The Met said it was just to make the operators job easier but did not need to be done.
Hi, Why is Lead Nitrate put into the Electrowinning cell before the electrowinning starts. What is its purpose? The Met said it was just to make the operators job easier but did not need to be done.
2
REPLIES
1674
VIEWS
Started by BUBKWEY
I have some tons of old Carbon that I keep in my store room after Elution. Their grade isn't economical enough to take them all for other Elution processes. May I please know the details of controlled burning, which kind of heat source is the b...
I have some tons of old Carbon that I keep in my store room after Elution. Their grade isn't economical enough to take them all for other Elution processes. May I please know the details of controlled burning, which kind of heat source is the b...
1
REPLY
1476
VIEWS
Started by Mista
I have a pregnant solution with grade 4 ppm. we send big amount of pregnant solution to activated carbon ,when we burn carbon and melt the ash we didn’t get gold ? can I get some help to solve this problem?
I have a pregnant solution with grade 4 ppm. we send big amount of pregnant solution to activated carbon ,when we burn carbon and melt the ash we didn’t get gold ? can I get some help to solve this problem?
1
REPLY
2252
VIEWS
Started by oro
I’m wondering if I’m in the ballpark with this and how scaleable it might be. 2.5 L of solution1% cyanide1% sodium hydroxide2% alcohol - 700g of activated carbon w/ aprox 2-3 g of gold- carbon is wrapped in mosquito netting- anode is a carbon /...
I’m wondering if I’m in the ballpark with this and how scaleable it might be. 2.5 L of solution1% cyanide1% sodium hydroxide2% alcohol - 700g of activated carbon w/ aprox 2-3 g of gold- carbon is wrapped in mosquito netting- anode is a carbon /...
1
REPLY
1468
VIEWS
Started by Rashid
Hello Guys, How can I increase Gold Purity during smelting by using ratio of fluxes, Currently I'm experiencing high silver in dore with low Gold purity. Fluxes Ratio used; Borax - 38% Silica - 10% Soda - 3% Nitre - 6%
Hello Guys, How can I increase Gold Purity during smelting by using ratio of fluxes, Currently I'm experiencing high silver in dore with low Gold purity. Fluxes Ratio used; Borax - 38% Silica - 10% Soda - 3% Nitre - 6%
3
REPLIES
2223
VIEWS
Started by Eagle788
Hello guys, I have absolutely no knowledge of the fascinating science of metallurgy. I do however am a student in history. Im more particularily trying to establish the authenticity of an ancient story in which there is mention of a large wall made ...
Hello guys, I have absolutely no knowledge of the fascinating science of metallurgy. I do however am a student in history. Im more particularily trying to establish the authenticity of an ancient story in which there is mention of a large wall made ...
5
REPLIES
2566
VIEWS
Started by MrTMBjewelry
Hello, My wife and I have been in the jewelry industry for several years, from manufacturing, personalizing, packaging, website, branding, and marketing of our own company and line of jewelry. The ups and downs of our retail business have led me to...
Hello, My wife and I have been in the jewelry industry for several years, from manufacturing, personalizing, packaging, website, branding, and marketing of our own company and line of jewelry. The ups and downs of our retail business have led me to...
Last replied to by Dave Tahija
Manhattan Gold & Silver Buys a lot of jewelers sweeps and scrap: https://www.mgsrefining.com/gold-refining-process/
Manhattan Gold & Silver Buys a lot of jewelers sweeps and scrap: https://www.mgsrefining.com/gold-refining-process/
2
REPLIES
3214
VIEWS
Started by vaheedghassemy
Hello all I want to add guar to electrolyte of copper and sulfuric acide then start to electrowinning but i dont knew how much add guar to electrolyte please help me. thanks
Hello all I want to add guar to electrolyte of copper and sulfuric acide then start to electrowinning but i dont knew how much add guar to electrolyte please help me. thanks
Last replied to by rbtmiller0@gmail.com
Below link takes you to an article that indicates 240 g/t of cathode. It is a place to start. https://books.google.cl/books?id=qp0hWKleKwcC&pg=PA182&lpg=PA182&dq=goma+guar+electrowinning&source=bl&o...
Below link takes you to an article that indicates 240 g/t of cathode. It is a place to start. https://books.google.cl/books?id=qp0hWKleKwcC&pg=PA182&lpg=PA182&dq=goma+guar+electrowinning&source=bl&o...
1
REPLY
1378
VIEWS
Started by vaheedghassemy
hello friends I want to measure the concentration of copper in the electrolyte and PLS but i dont know how i can do that .please help me thanks a lot
hello friends I want to measure the concentration of copper in the electrolyte and PLS but i dont know how i can do that .please help me thanks a lot
Last replied to by Mike
Your question can be answered several ways, depending on what you are actually looking for. The basic topic is covered by metallurgical accounting, where generally recognized formula are used to mea...
Your question can be answered several ways, depending on what you are actually looking for. The basic topic is covered by metallurgical accounting, where generally recognized formula are used to mea...
3
REPLIES
1698
VIEWS
Started by ToddLaw
I've got a mine with sulfides in my ore. For reasons unrelated I haven't been running my ore for 22 years. I used to burn my ore with a Beckett oil burner in a contained environment and extract the output with water. The sulfides would ignite in the ...
I've got a mine with sulfides in my ore. For reasons unrelated I haven't been running my ore for 22 years. I used to burn my ore with a Beckett oil burner in a contained environment and extract the output with water. The sulfides would ignite in the ...
3
REPLIES
1755
VIEWS
Started by DieselDave
I'm a micro miner and have zinc / silver ore, also has gold in arsenopyrite. I'm wondering how to micro scale extract the silver without froth flotation, arsenic?
I'm a micro miner and have zinc / silver ore, also has gold in arsenopyrite. I'm wondering how to micro scale extract the silver without froth flotation, arsenic?
Last replied to by Jose Doneiber
Hello my dear friend. In Colombia there are argentiferous minerals and I have observed that the most indicated method is to first float the ore then leach it with cyanide, you can do it on a small sc...
Hello my dear friend. In Colombia there are argentiferous minerals and I have observed that the most indicated method is to first float the ore then leach it with cyanide, you can do it on a small sc...
1
REPLY
1379
VIEWS
Started by sajjadaghazadeh
can someone help me with chunks problems in iron ore pellets in rotary kilns? thanks so much.
can someone help me with chunks problems in iron ore pellets in rotary kilns? thanks so much.
1
REPLY
1330
VIEWS
Started by Cl.BrINHOF
While electrorefining in a CuSO4 electrolyte (Cu anode to SS blank) what are the roles of additives (thiourea, glue, salt) in relation to bubble formation? More specifically, is there any evidence to support the claim that the potential to create mor...
While electrorefining in a CuSO4 electrolyte (Cu anode to SS blank) what are the roles of additives (thiourea, glue, salt) in relation to bubble formation? More specifically, is there any evidence to support the claim that the potential to create mor...
Last commented on by Cl.BrINHOF
Thank you. I appreciate your response.
Thank you. I appreciate your response.
2
REPLIES
1191
VIEWS
Started by leonard
how do you seperate fine gold loaded activated carbon from pulp?
how do you seperate fine gold loaded activated carbon from pulp?
Last replied to by rob riggir
Try coal flotation techniques as filtration will not work as both the pulp and carbon particle sizes will likely be similar. Cheers
Try coal flotation techniques as filtration will not work as both the pulp and carbon particle sizes will likely be similar. Cheers
3
REPLIES
1463
VIEWS
Started by jovanifirebird
hello metallurgists. we have had an issue of importing HCL to our gold processing plant. delivery date is getting delayed. however, we do have stocks of 55% H2O2 in our site. do you think it is possible to replace HCl with 55% H2O2 for carbon washing...
hello metallurgists. we have had an issue of importing HCL to our gold processing plant. delivery date is getting delayed. however, we do have stocks of 55% H2O2 in our site. do you think it is possible to replace HCl with 55% H2O2 for carbon washing...
2
REPLIES
1696
VIEWS
Started by FranLaraMonge
I am Francisco Lara Monge, peruvian chemical engineer working in a flotation plant in Ecuador. Few days ago, for second time, we have a bigbag, with low grade concéntrate, which have violent reaction producing SO2, high temperature 250°C, and with ...
I am Francisco Lara Monge, peruvian chemical engineer working in a flotation plant in Ecuador. Few days ago, for second time, we have a bigbag, with low grade concéntrate, which have violent reaction producing SO2, high temperature 250°C, and with ...
3
REPLIES
3924
VIEWS
Started by zwivhuya
i would like assist on how i can remove silver metal from an ionic insoluble silver chloride.
i would like assist on how i can remove silver metal from an ionic insoluble silver chloride.
4
REPLIES
1703
VIEWS
Started by oro
For batch leach samples - instead of stripping the AC I was wondering if it can be smelted, maybe with a bit of litharge as a collector and some borax to slag off contaminants. I understand the carbon can be “ashed” in an electric muffle furnac...
For batch leach samples - instead of stripping the AC I was wondering if it can be smelted, maybe with a bit of litharge as a collector and some borax to slag off contaminants. I understand the carbon can be “ashed” in an electric muffle furnac...
1
REPLY
1387
VIEWS
Started by chemgla68
I have been using a traditional muffle style furnace for years and am looking to speed up the process by switching over to an induction furnace. My question is this - does an induction furnace lower the overall hi temp needed to process ores containi...
I have been using a traditional muffle style furnace for years and am looking to speed up the process by switching over to an induction furnace. My question is this - does an induction furnace lower the overall hi temp needed to process ores containi...
2
REPLIES
4208
VIEWS
Started by
Have been told there are ways to use certain chemicals to help break down black sands, then cook it and kiln it to make a Dore bead. Have sands with gold, silver and platinum but is very fine and is attached in the sand unless it is ground up. Any ...
Have been told there are ways to use certain chemicals to help break down black sands, then cook it and kiln it to make a Dore bead. Have sands with gold, silver and platinum but is very fine and is attached in the sand unless it is ground up. Any ...
Last commented on by
What chemical do you use for the bio leaching process? You can give a call or text if you don't want to post to the world 307-272-9814. Have another guy says Clorox and table salt will pop open and ...
What chemical do you use for the bio leaching process? You can give a call or text if you don't want to post to the world 307-272-9814. Have another guy says Clorox and table salt will pop open and ...
1
REPLY
1310
VIEWS
Started by H.OK
Hi, I am currently doing a study on the reuse of concrete (to avoid landfill) and I am looking for applications within the mining industry. Smelting is one option, as the heat would allow for any contaminants within the concrete to be destroyed in t...
Hi, I am currently doing a study on the reuse of concrete (to avoid landfill) and I am looking for applications within the mining industry. Smelting is one option, as the heat would allow for any contaminants within the concrete to be destroyed in t...
Last replied to by bernhards
https://www.slimbreker.nl/smartcrusher.html Something like this? A dutch company recycles on site, and so on.
https://www.slimbreker.nl/smartcrusher.html Something like this? A dutch company recycles on site, and so on.
2
REPLIES
1461
VIEWS
Started by paulbwalya
We will be producing an alloy with the following specs Cu 76% Ni 0.42% Pb 12% Ag 1.53% Au 10% I am looking at electro refining of this alloy and treating the slimes for gold recovery. any though of the idea and suppliers for small scale El...
We will be producing an alloy with the following specs Cu 76% Ni 0.42% Pb 12% Ag 1.53% Au 10% I am looking at electro refining of this alloy and treating the slimes for gold recovery. any though of the idea and suppliers for small scale El...
3
REPLIES
1879
VIEWS
Started by Gold Fox
What would be the ideal process to recover Gold from sulphides once I have concentrates, I have read that roasting first and second smelting it directly with Chapman flux? it is a non leaching process. I am looking also for best way to get free gold...
What would be the ideal process to recover Gold from sulphides once I have concentrates, I have read that roasting first and second smelting it directly with Chapman flux? it is a non leaching process. I am looking also for best way to get free gold...
8
REPLIES
1860
VIEWS
Started by CA
We built and operate a 100kg zadra/zadra with alchohol stripping system that we have used successfully for a a while now. We recently began (trying) to strip carbon from a non-cyanide leach pilot plant and are unable to elute the gold from the carbo...
We built and operate a 100kg zadra/zadra with alchohol stripping system that we have used successfully for a a while now. We recently began (trying) to strip carbon from a non-cyanide leach pilot plant and are unable to elute the gold from the carbo...
1
REPLY
2296
VIEWS
Started by doum
I need a way to extract the gold from those rock....i need it simple because it is for pleasure...THANKS! I've try to crush it, roast it,and melt it whit Chapman flux (2 part of flux for 1 of materiel) for 1hrs in my propane furnace but the only thi...
I need a way to extract the gold from those rock....i need it simple because it is for pleasure...THANKS! I've try to crush it, roast it,and melt it whit Chapman flux (2 part of flux for 1 of materiel) for 1hrs in my propane furnace but the only thi...
Last replied to by David
What you are hoping to do, directly on rock, is not something the heavy mining industry normally does. It's nothing I know much about for sure. Try this maybe. https://www.youtube.com/watch?v=YGaCQY...
What you are hoping to do, directly on rock, is not something the heavy mining industry normally does. It's nothing I know much about for sure. Try this maybe. https://www.youtube.com/watch?v=YGaCQY...
1
REPLY
1713
VIEWS
Started by Scotman
I have a supply of high grade (+50gm/t) wood chip ash, as well as a supply of loaded carbon fines. What would the process be to recover the gold from these products? Is there a pyromet process that one could undertake, and then leach the gold?
I have a supply of high grade (+50gm/t) wood chip ash, as well as a supply of loaded carbon fines. What would the process be to recover the gold from these products? Is there a pyromet process that one could undertake, and then leach the gold?
Last replied to by David
Did you see https://www.911metallurgist.com/pyrometallurgy/ashing-of-gold-activated-carbon-and-its-recovery/
Did you see https://www.911metallurgist.com/pyrometallurgy/ashing-of-gold-activated-carbon-and-its-recovery/
4
REPLIES
1916
VIEWS
Started by hulk
HI; In our plant we noticed a massive corrosion of electrolysis cells anodes ; however, we comply with all Operations instructions: pH> 12; 1-2% NaOH.We suspect the presence of chlorides from the acid wash.Is there any process that would allo...
HI; In our plant we noticed a massive corrosion of electrolysis cells anodes ; however, we comply with all Operations instructions: pH> 12; 1-2% NaOH.We suspect the presence of chlorides from the acid wash.Is there any process that would allo...
Last commented on by Cadia Systems
Be aware the pH requirement is to maintain above pH > 12.6 and this should always be measured by titration and not the use of a pH probe. Chlorides will attack the grain boundaries of your anodes ...
Be aware the pH requirement is to maintain above pH > 12.6 and this should always be measured by titration and not the use of a pH probe. Chlorides will attack the grain boundaries of your anodes ...
3
REPLIES
2437
VIEWS
Started by mohammed_tawfik
And could i use a zadra cells for one tone of active carbon ? Which pregnant solution does it work on ? does it work after the active carbon or don't require active carbon stage ? What is the recovery rate of the cell ? o...
And could i use a zadra cells for one tone of active carbon ? Which pregnant solution does it work on ? does it work after the active carbon or don't require active carbon stage ? What is the recovery rate of the cell ? o...
Last replied to by mohammed_tawfik
Procedures. Inorganic Concentration: Lead - AcidReagentsC Granulated lead: + 10 mesh - (screened test lead may be used)C Concentrated HClC Lead Foil (7.5 cm x 7.5 cm)C Ag for inquartation (AgNO3, soli...
Procedures. Inorganic Concentration: Lead - AcidReagentsC Granulated lead: + 10 mesh - (screened test lead may be used)C Concentrated HClC Lead Foil (7.5 cm x 7.5 cm)C Ag for inquartation (AgNO3, soli...
1
REPLY
1638
VIEWS
Started by mohammed_tawfik
i ask about gold pairing carbon if i want to get the gold from the carbon by smelting , do i smelt the carbon directly or their is another method ?
i ask about gold pairing carbon if i want to get the gold from the carbon by smelting , do i smelt the carbon directly or their is another method ?
Last commented on by mohammed_tawfik
so i need a muffled furnace , the carbon column is about one tone you suggest ashing every batch then smelt it
so i need a muffled furnace , the carbon column is about one tone you suggest ashing every batch then smelt it
3
REPLIES
1652
VIEWS
Started by Vishnu patel
i would like to know the process and some technical details to process copper metal with recovering of gold by electrowinning, could any please suggest how to start with....is it possible to recover gold from electrowinning of copper metal (dross or ...
i would like to know the process and some technical details to process copper metal with recovering of gold by electrowinning, could any please suggest how to start with....is it possible to recover gold from electrowinning of copper metal (dross or ...
4
REPLIES
1532
VIEWS
Started by clyde
Hello,I'm a junior geologist and I have a few questions concerning the fire assay fusion that labs use to determine Au concentration.If I have a gold ore associated with Quartz SiO2, since quartz's melting point is around 1700°C and the fire-a...
Hello,I'm a junior geologist and I have a few questions concerning the fire assay fusion that labs use to determine Au concentration.If I have a gold ore associated with Quartz SiO2, since quartz's melting point is around 1700°C and the fire-a...
It is important to mention that bismuth has a special property of expanding during cooling. Therefore, is added to reduce the contraction of the alloy tin-bismuth. Also, the addition of bismuth is mad...