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Started by 2square
I was wondering if somebody might be so kind to help me by answering this question- Is it technically or theoretically possible to create an alloy consisting of 90% pure (24k) gold and 10% steel?If it were forged in the right conditions, could this ...
I was wondering if somebody might be so kind to help me by answering this question- Is it technically or theoretically possible to create an alloy consisting of 90% pure (24k) gold and 10% steel?If it were forged in the right conditions, could this ...
Last commented on by Mike
Sorry but this is not an area I feel qualified to consult in.
Sorry but this is not an area I feel qualified to consult in.
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292
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Started by spikey1973
I have a question about the (exact) composition of an alloy which is known to be referred to as "old German silver", mainly in the UK/US. Finding out composition of this (historic) alloy is important to me, because this material was used for the m...
I have a question about the (exact) composition of an alloy which is known to be referred to as "old German silver", mainly in the UK/US. Finding out composition of this (historic) alloy is important to me, because this material was used for the m...
Last commented on by spikey1973
Other alloys I found to be used is Cu50Ni25%Zn25% for imitation silver for knives and forks. Chinese white silver or packfong (paktong) the amount of copper is Like the old hildburghausen ore, Germa...
Other alloys I found to be used is Cu50Ni25%Zn25% for imitation silver for knives and forks. Chinese white silver or packfong (paktong) the amount of copper is Like the old hildburghausen ore, Germa...
1
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252
VIEWS
Started by hassanasif
i want to roast stubnite ore(sb2s3) with antimony content 53%, sulfur 18% and Si 16%. Becasue silicon content is high, i have decided to go towards roasting followed by carbin reduction. I have a gas powered tilting mellting furnace with a capacity o...
i want to roast stubnite ore(sb2s3) with antimony content 53%, sulfur 18% and Si 16%. Becasue silicon content is high, i have decided to go towards roasting followed by carbin reduction. I have a gas powered tilting mellting furnace with a capacity o...
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348
VIEWS
Started by John KK
Hi everyone Recently we are getting high copper in our gold dores, is there a way to lower the amount of copper. My flux recipe and fineness results are below. Calcine = 1000 gram Bora...
Hi everyone Recently we are getting high copper in our gold dores, is there a way to lower the amount of copper. My flux recipe and fineness results are below. Calcine = 1000 gram Bora...
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337
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Started by Coins7112
Need assistance in identifying a cause of a tin bronze occurring in 1910/1911 Lincoln wheat cent. Flake like features on a small run of Lincoln wheat cents have been identified. SEM/EDX reading shows flakes reading higher than normal SN and ZN. Coppe...
Need assistance in identifying a cause of a tin bronze occurring in 1910/1911 Lincoln wheat cent. Flake like features on a small run of Lincoln wheat cents have been identified. SEM/EDX reading shows flakes reading higher than normal SN and ZN. Coppe...
Last replied to by Mike
The most likely reason would be poor control during the smelting proces allowing for poor mixing in the cupela or a batch of material with the wrong percentages in the mix. Another possibility would ...
The most likely reason would be poor control during the smelting proces allowing for poor mixing in the cupela or a batch of material with the wrong percentages in the mix. Another possibility would ...
1
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785
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Started by Markhb
Hello. I have approx 20oz of gold that I have inquarted with copper and digested with nitric acid, 2/3 water, 1/3 nitric. I have washed, dried and analyzed it using an Olympus XRF.My problem is the presence of tin which I have read cannot be removed ...
Hello. I have approx 20oz of gold that I have inquarted with copper and digested with nitric acid, 2/3 water, 1/3 nitric. I have washed, dried and analyzed it using an Olympus XRF.My problem is the presence of tin which I have read cannot be removed ...
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722
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Started by PhilN
I am a bullet caster and am being told by the very experienced smelters/casters that if I don't flux and stir the melt that as I scrape off the dross I am actually removing the tin and antimony possibly to the point of ending up with pure lead. Bei...
I am a bullet caster and am being told by the very experienced smelters/casters that if I don't flux and stir the melt that as I scrape off the dross I am actually removing the tin and antimony possibly to the point of ending up with pure lead. Bei...
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888
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Started by metallurgyfan
Here in the UK, borax does not seem to be available, I have read online that it's banned due to potential health hazards. The youtube videos i've seen all use borax when melting down gold powder. Is there an alternative to borax that I can use in the...
Here in the UK, borax does not seem to be available, I have read online that it's banned due to potential health hazards. The youtube videos i've seen all use borax when melting down gold powder. Is there an alternative to borax that I can use in the...
1
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727
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Started by gbrideau
Hi forum members, I can't seem to be able to find much information about cupelling karat gold, as in 10k rings, for example. At what temperature should I cupel a 10k gold ring? I've noticed a few posts mentioning that gold should be cupelled at ...
Hi forum members, I can't seem to be able to find much information about cupelling karat gold, as in 10k rings, for example. At what temperature should I cupel a 10k gold ring? I've noticed a few posts mentioning that gold should be cupelled at ...
2
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1104
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Started by Reejay
Hello, I need help on the ways to improve the quality of the ash produced after incinerating fine carbon. We have introduced drier to reduce moisture but still the ash contains so much fine carbon that is not completely combusted. Please can anyo...
Hello, I need help on the ways to improve the quality of the ash produced after incinerating fine carbon. We have introduced drier to reduce moisture but still the ash contains so much fine carbon that is not completely combusted. Please can anyo...
Last commented on by Mike
You combust the carbon to release any trapped metals.
You combust the carbon to release any trapped metals.
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1394
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Started by Woody
Hi All i have built a small drum to try and Ash Carbon which seems to work alright but needs to be tweaked. But was wondering if someone could help in the best way to get Au out of the Ash. Any help would be greatly appreciated
Hi All i have built a small drum to try and Ash Carbon which seems to work alright but needs to be tweaked. But was wondering if someone could help in the best way to get Au out of the Ash. Any help would be greatly appreciated
0
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892
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Started by Usmodlover
Hello. I work as a patent examiner and am working on an application for an ironmaking sinter that specifies a certain reducibility index calculated from ISO 4695:2015 and ISO7215:2015 (format of #.##). I've noticed a lot of existing information exist...
Hello. I work as a patent examiner and am working on an application for an ironmaking sinter that specifies a certain reducibility index calculated from ISO 4695:2015 and ISO7215:2015 (format of #.##). I've noticed a lot of existing information exist...
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695
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Started by Soar2cLLC
I seem to be losing half of my lead collector metal during my smelt. My smelt consitentcy usually needs several reapplications of borax after already adding in 2x the sample weight of borax and 1x the sample weight of champman Flux. Its usually a v...
I seem to be losing half of my lead collector metal during my smelt. My smelt consitentcy usually needs several reapplications of borax after already adding in 2x the sample weight of borax and 1x the sample weight of champman Flux. Its usually a v...
1
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1093
VIEWS
Started by morin2001
Hi I’ve got a concentrate I have made with flotation, most free gold is already out by gravity. Now I have a concentrate of pyrite gold and a trace of copper but not much. There is no arsenic. I was looking for some advice on what would be the best...
Hi I’ve got a concentrate I have made with flotation, most free gold is already out by gravity. Now I have a concentrate of pyrite gold and a trace of copper but not much. There is no arsenic. I was looking for some advice on what would be the best...
2
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684
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Started by Doeba0ermo
Hello everyone!I was working on a side project and while working on it, I found I needed to think of a strong gold coloured alloy that isn't too dense but still quite durable. I am in no way a metallurgist, so I'm sorry if I use wrong terms or misund...
Hello everyone!I was working on a side project and while working on it, I found I needed to think of a strong gold coloured alloy that isn't too dense but still quite durable. I am in no way a metallurgist, so I'm sorry if I use wrong terms or misund...
Last replied to by Mike
There are several metallic alloys that have a golden color some contain no gold (see pinchbeck), the main issue being what physical properties are you interested in as this makes a big difference.
There are several metallic alloys that have a golden color some contain no gold (see pinchbeck), the main issue being what physical properties are you interested in as this makes a big difference.
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1077
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Started by benport
I put a handful of buttons in a 6" cupel and placed it in the furnace. When I checked it the cupel had cracked and the melt gone inside the cupel. What is the best way to recover it?
I put a handful of buttons in a 6" cupel and placed it in the furnace. When I checked it the cupel had cracked and the melt gone inside the cupel. What is the best way to recover it?
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1234
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Started by randy N
can anyone tell me how to refine the titanium disks in cpu i have 4 disks and am wanting to try
can anyone tell me how to refine the titanium disks in cpu i have 4 disks and am wanting to try
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829
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Started by Bhaduri
I need some input on design-engineering & ultimately EPCM US (overseas will work) based entities who have experience building up-to 50,000-mtpy spent catalyst recycling plants...both base (Mo, W, Ni, Co, V) & precious metal (Pt, Pd) spent catalyst ex...
I need some input on design-engineering & ultimately EPCM US (overseas will work) based entities who have experience building up-to 50,000-mtpy spent catalyst recycling plants...both base (Mo, W, Ni, Co, V) & precious metal (Pt, Pd) spent catalyst ex...
Last replied to by Mike
Are you still looking for a consultant/EPCM for spent catalyst?
Are you still looking for a consultant/EPCM for spent catalyst?
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979
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Started by randy N
i now have about 10 gallons of muriatic acid peroxide and water in 2, 5 gal. buckets and im sure my gold disolved with the tap water i need help to recover my gold from the 10 gal of mixed liquids and need to know what to buy and how to recover f...
i now have about 10 gallons of muriatic acid peroxide and water in 2, 5 gal. buckets and im sure my gold disolved with the tap water i need help to recover my gold from the 10 gal of mixed liquids and need to know what to buy and how to recover f...
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980
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Started by TENET
Hello Friends, I am very glad to have found this forum. I hope the expertise here can shed some light on something I've been trying to research. In Japan, I found several old silver/ copper/ gold refineries. They were abandoned sometime in the late ...
Hello Friends, I am very glad to have found this forum. I hope the expertise here can shed some light on something I've been trying to research. In Japan, I found several old silver/ copper/ gold refineries. They were abandoned sometime in the late ...
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915
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Started by 7CHEESE8
I have refined gold with ar with success. I have gold silver amalgam that I'm not sure what the steps are to separate the metals. Gold and silver amalgam come from where I'm working. I started by retorting the amalgam. I'm guessing a nitric bath. T...
I have refined gold with ar with success. I have gold silver amalgam that I'm not sure what the steps are to separate the metals. Gold and silver amalgam come from where I'm working. I started by retorting the amalgam. I'm guessing a nitric bath. T...
Last replied to by Nonoy Celera
Retort the amalgam to removed the hazardous mercury. The mercury-free sludge can be melted in an appropriate flux to slag-out base metals in the sludge. You will produce a silver-gold dore'. If you ne...
Retort the amalgam to removed the hazardous mercury. The mercury-free sludge can be melted in an appropriate flux to slag-out base metals in the sludge. You will produce a silver-gold dore'. If you ne...
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1028
VIEWS
Started by shaurytheseth
Currently we are refining raw god(old jewelry) using silver and nitric acid, and are able to achieve purity of 99.50%, but are not able to remove trace amounts of iridium, ruthenium and osmium. Fire assay method gives purity of approx. 99.50%, but XR...
Currently we are refining raw god(old jewelry) using silver and nitric acid, and are able to achieve purity of 99.50%, but are not able to remove trace amounts of iridium, ruthenium and osmium. Fire assay method gives purity of approx. 99.50%, but XR...
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898
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Started by nshiva20
I would like to know in which form, the impurities used to present inside ETP copper and its effects on electrical conductivity.If its affects electrical conductivity,either impurity in solution affects more or in complex mixture affects more?
I would like to know in which form, the impurities used to present inside ETP copper and its effects on electrical conductivity.If its affects electrical conductivity,either impurity in solution affects more or in complex mixture affects more?
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896
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Started by rachit
Hi all, Does anyone know what can be done to avoid freezing issues or ore in silos in temperature as below as -40degrees celsius. We are using calcium chloride solution but it doesnt seem to be helping alot.
Hi all, Does anyone know what can be done to avoid freezing issues or ore in silos in temperature as below as -40degrees celsius. We are using calcium chloride solution but it doesnt seem to be helping alot.
Last replied to by Mike
The only thing that seems to work reliably is using heat tracing, but this can be expensive depending on the silo size. Also at -40 degrees you do not need to specify Celsius or Fahrenheit as they ar...
The only thing that seems to work reliably is using heat tracing, but this can be expensive depending on the silo size. Also at -40 degrees you do not need to specify Celsius or Fahrenheit as they ar...
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846
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Started by Gabriel
Hello everyone, could someone tell me a company that sells a complete solution for roasting + gas treatment? It's for gold ore. My need is to process 200,000t at a rate of 20 to 30 t / h, depending on the roasting capacity. I will use a maximum temp...
Hello everyone, could someone tell me a company that sells a complete solution for roasting + gas treatment? It's for gold ore. My need is to process 200,000t at a rate of 20 to 30 t / h, depending on the roasting capacity. I will use a maximum temp...
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1154
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Started by platinum01786
I Currently have an aqua regia refining plant from italy which refines 15kg Gold at a time.after our refining process we notice that the gold we refine is normally between 999.6-999.9however the final surface of the gold has rough edges and has a dul...
I Currently have an aqua regia refining plant from italy which refines 15kg Gold at a time.after our refining process we notice that the gold we refine is normally between 999.6-999.9however the final surface of the gold has rough edges and has a dul...
Last replied to by
Au powder after reduction and digestion with HCl, rinsing with water, pour 5 - 10% NH4OH. Then rinse thoroughly with water before granulating. Probably the fogging can be due to AgCl which is dissolv...
Au powder after reduction and digestion with HCl, rinsing with water, pour 5 - 10% NH4OH. Then rinse thoroughly with water before granulating. Probably the fogging can be due to AgCl which is dissolv...
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958
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Started by Silverhair
I have 26 kg of pure silver nitrate I am going to make to metal using aluminum, copper or zinc metal. Which solution is easiest to dispose of safely? I want to refine the silver sludge using electrolysis. Will I have to dry it and melt it into an ele...
I have 26 kg of pure silver nitrate I am going to make to metal using aluminum, copper or zinc metal. Which solution is easiest to dispose of safely? I want to refine the silver sludge using electrolysis. Will I have to dry it and melt it into an ele...
Last replied to by
Pure AgNO3 is already suitable for electrolysis without reducing silver with Zn, Cu, Al. 1H18N9T steel electrodes or similar. Voltage below 5V, preferably 0.5-2V.AgNO3 solution must be acidified with ...
Pure AgNO3 is already suitable for electrolysis without reducing silver with Zn, Cu, Al. 1H18N9T steel electrodes or similar. Voltage below 5V, preferably 0.5-2V.AgNO3 solution must be acidified with ...
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1032
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Started by keshab Meher
We want to do the calcination of Gypsum which is received in the form of Lumps and then crushed to the required size, which is in turn calcined and again grinded to get the desired particle size. The finished good is the Calcined Gypsum Powder of req...
We want to do the calcination of Gypsum which is received in the form of Lumps and then crushed to the required size, which is in turn calcined and again grinded to get the desired particle size. The finished good is the Calcined Gypsum Powder of req...
0
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864
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Started by Tom Cobett
We have extracted PGMs into an Fe matrix dore'. We would like to move the PGMs into a Cu dore'. What is an easy way to oxidize the Fe out of the furnace after we have melted Fe and Cu together? Will everything go into the Cu?
We have extracted PGMs into an Fe matrix dore'. We would like to move the PGMs into a Cu dore'. What is an easy way to oxidize the Fe out of the furnace after we have melted Fe and Cu together? Will everything go into the Cu?
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1575
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Started by sanwalzafar
Hello Guys. I am a researcher and I need to know what flux can we use to purify zinc dross 95% (containing 1-3% iron and 1-2% aluminum). Please suggest a flux that can be used to achieve 99% plus purity. Thanks
Hello Guys. I am a researcher and I need to know what flux can we use to purify zinc dross 95% (containing 1-3% iron and 1-2% aluminum). Please suggest a flux that can be used to achieve 99% plus purity. Thanks
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Started by Jorge Quintanilla
Good afternoon everyone. I hope none of you have had problems with covid, please take care. My query is about a rotary dryer for tin concentrate. I am working on an expansion project for the Colquiri mine in Bolivia. In a mine that has a technical au...
Good afternoon everyone. I hope none of you have had problems with covid, please take care. My query is about a rotary dryer for tin concentrate. I am working on an expansion project for the Colquiri mine in Bolivia. In a mine that has a technical au...
Last commented on by Jorge Quintanilla
Thank You very much. You clarified the idea for me.
Thank You very much. You clarified the idea for me.
Many thanks to everyone for their input, much appreciated.