The gold and silver refining industry and assaying laboratories use Dehybor anhydrous borax as part of their flux formulations. The other ... Dehybor anhydrous borax, potassium borates and in some rare cases potassium fluoborates. Several company are also making welding rods where the flux is bound
hi is potassium nitrate kn03 know as saltpeter :?: thanks. Forums. New posts Search forums. What's new. New posts Latest activity. Members. Registered members Current visitors. ... Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. T. tintin …
Sodium Nitrate 99+% Purity MinimumWhite Pellets / PrilledSodium nitrate is the chemical compound with the formula NaNO3. This salt, also known as Chile saltpeter (to distinguish it from ordinary sa
Borax, soda ash, silica, manganese Chapmans white recommended if silver recovery is desired Borax, silica, soda ash. High potassium or sodium nitrate recipes usually use litharge conversion Pbo-Pb with flour as a carbon source at about 1% flour to Litharge to produce a specific sized prill.
(use distilled water if you have it) Stir the sodium nitrate and water mix and let that sit for at least 1 hour. Now add 1 quart of sulfuric acid (auto battery acid). Stir the solution a couple times and let it set overnight. The next day pour off just the liquid without pouring off any of the white sodium nitrate residue.
Borax does more than clean clothes; it can also "clean" gold ore to produce samples of pure gold. Learn how borax-based refining works in this article.
Copper Nitrate Cell. Thread starter rusty; Start date Apr 18, 2011; Help Support Gold Refining Forum: ...
Then sprinkle on sparingly a few prills of potassium nitrate (niter). The niter will dance around on the surface and will oxidize out small amounts of base metals which will stick to the borax. It's an art to develop the right quantity of borax to collect all of the oxides from the pool of molten metal.
A group of miners in the Philippines has demonstrated that borax, when used as a flux for smelting gold out of heavy mineral concentrates, is an effective and safer …
Steyn I just want to ask a few question as i am not sure if I understand everything you used 1,5 lbs chips ( ceramic ) Black + white + 2 gram gold nugget 500 ml HCL ( how strong ) + 200 ml Hcl + 20 ml water 6 or 7 times 2 tea spoons of potassium nitrate ( or is the total 6 or 7 tea spoons ) from all this you did evaporate 150 ml so far ?
Caustic soda in the molten pool, it form silicates with the silica transforming the base metals into oxide embedded in the slag as well the borax but the potassium nitrate also …
Dehybor® anhydrous borax is used in the gold refining industry as part of flux formulations to dissolve metal oxides, as well as being used as a ux in gold assaying.
Hi all ! This is perhaps my first post, nonetheless, I've spent many hours admiring your site and all the great work. I have a problem…, but firstly, perhaps I must explain the situation. I started life as a watchmaker in England about 50 years ago and after moving to Belgium, I taught...
A good oxidizing flux I've used is; 1 part sodium carbonate 1 part anhydrous borax 2.5 parts potassium nitrate 1 part silica of course an intimate contact with the oxidizable metals is required, a pool of this flux at temperature will out gas without much effect on your charge. Air alone is a powerful oxidizer if you can get the molten metal ...
Dear Members, I'm new to refining and wish to learn the step-by-step process of refining and segregating Gold, Silver, and Palladium from E-scrap. Below are the chemicals which i have secured for the task, Sulphuric Acid Nitric Acid Potassium Cyanide Mercury Potassium Nitrate (SaltPeter) Caustic Soda Metstrip Alum BORAX I …
WAAH! I have a new Au button that's just a hair over an ounce. All from fingers and well washed and cleaned with H2O / HCL / ammonia / H20. Nice looking Au powder went into the melt. When it came out of the melt the bottom looks great but the top has a milky sheen to it like I spread mayo on...
I use Borax, Silica flour, Soda ash and Potassium nitrate. Most of my sludge contains Copper, what is the best flux calculation to use say if one have a dried calcine of 95 kg. Please advice on a formula to use on fluxes for dried gold calcine to smelt in an …
You need to explain a bit more, the general fluxes used for smelting of gold concentrates are Borax (40-50%); Soda Ash (10-15%) and Sillica sand (5-10%) of your dry concentrate mass, this also vary on the type of oven and very much on your ore type or your concentrate, thus my figures are normaly used in gold mines with general impurities …
What is commonly used is boric acid, or borax. Borax absorbs oxides, and boric acid, if I am not mistaken (I may be) reduces oxides, so they are returned to the parent metal. ... I believe that major gold refining company use this powder when making a fine 99.99 1kg bar. Reply. T. teabone ... and chemically called potassium nitrate. It works ...
Nitre (potassium nitrate – KNO3) ... If the sample is high in copper, one can use 2 grams of borax. ... The standard lead collection scheme used for gold gives good recovery for platinum and palladium as well. They are soluble in aqua regia and can be measured with gold in a multi element instrument such as ICP/OES or ICP/MS.
Please advice how can I increase the gold purity during smelting from sulphide ore, fluxes used are Borax (dehydrated), Silica, Soda ash and Potassium Nitrate. It is for smelting of EW sludge and I want to reduce the amount of silver and …
Then you added your gold powder and some premixed flux containing potassium carbonate, potassium nitrate and borax. Notice the formula for the borax - Na 2 B 4 O 7 ·10H 2 O. The 10H 2 O at the end of the formula is water molecules bound up in the matrix of the borax.
The gas or electricity was reduced during the ignition period. After the ignition was completed, the temperature was raised to 2000o C for 90 minutes. If necessary, borax or potassium nitrate was added to maintain fluidity of the mixture. When there was no more apparent reaction, the mixture was poured into a mold to cool, and …
Borates ensure neutral pH during the last stage of nickel recovery—electrolysis. The right borate level (in boric acid, boric oxide, or anhydrous borax form) enables greater pH control and proper …
For making nitric acid, I prefer soda of nitrate (Hi-Yield soda of nitrate fertilizer). Four pounds for around $7 at most Ace hardware stores and many farm stores. The soda of nitrate seems to produce a bit more acid by volume, and the salts from potassium nitrate can can cause some real headaches as well as trap a good bit of …
End users can adjust the components to adapt this flux to their specific needs. Typically used for smelting, refining, and melting concentrates." It contains the following: 20% potassium nitrate, 8.75% soda ash, 62.5% borax, 8.75% silica. My thought was that I would need an oxidizer for the tellurium and bismuth.
The bullion is melted in clay crucibles, and a little nitre (potassium nitrate) or sodium nitrate is thrown on to the surface of the metal. Violent bubbling at once ensues, …
Thought maybe I should ad these pics showing set up you need for smelting - the silver on the scale was a small batch of fixer recovered silver/silver sulfide the cone mold is on the ground to the right - I put it on the turkey fryer burner to heat it before pouring metal/slag into it - in this picture I had the crucible sitting on the turkey fryer burn to …
When I use this refining method, I regard the purity of the gold as 22kt, and I alloy it accordingly down to 18kt or 14kt. ... The fine gold looks just like used coffee grounds, and if you take it between your fingers, is crumbles just like coffee. Then I mix it with alcohol and borax and saltpetre ( potassium nitrate) all available at your ...
Per the bold print (salt peter) - NO - salt peter is potassium nitrate - when smelting any kind of material that has silver in it (such as ore containing silver, silver plated copper/brass, silver slimes from silver cell etc. etc.) you never want to use potassium nitrate (or any other nitrate) as part of your flux ingredients The reason for that is that …
Jsargent: Indeed!!!!!....silver sulfide melts without change so you will never see metalic silver.However, we have to learn how to deal with silver sulfide because it is the most important ore to produce metalic silver and all silver compounds can be converted to silver sulfide...Here are three tips from my experience: 1.- Melt the silver sulfide with …
when i smelt gold pieces i add always borax, sometimes sodium carbonate and potassium nitrate. Gold melts forming a ingot and in the top i have the slag. A bit of gold is in that slag, because there is a decrease and matter is not created or destroyed so i save the slag of all funditions i do. when i have enought i crush them, and now i have a ...
I tested potassium nitrate with e-waste alloy couple times, almost I got same alloy weight each time, even iron and tin not oxidized, I started to add 10% KNO3 from alloy weight and reach up to 50% with no changes, no metals oxidized, I make sure about using oxidizing flame all the time, and stir the KNO3 mixed with borax and soda ash to absorb …
I did 5 total smelts on the material. One using the potassium nitrate process from Manuel and 4 different tries doing it with the process from Harold. I ended up with about 15 lbs of a black sludge washed out from the bottom of the 3 gallon pail . Used a heater and heat lamp to dry out the sludge over 5 days.
Use two ounces of saltpeter and a lot of borax calcined by the dregs of the silver. Repeat as long as the slag still has color. You can refine gold by using potassium nitrate (saltpeter) in the same manner as refining silver, except that you must not use borax because it ruins the color of the gold.
Per the bold print (salt peter) - NO - salt peter is potassium nitrate - when smelting any kind of material that has silver in it (such as ore containing silver, silver plated copper/brass, silver slimes from silver cell etc. etc.) you never want to use potassium nitrate (or any other nitrate) as part of your flux ingredients The reason for that is that …
I melted some gold powder into a beautiful button. After cooling, it had a slight silvery discoloration on the top surface. The bottom side (in the borax flux during the melt) is shiny and gold. The pipe looks great and there is good crystallization, so it is probably over 99%. During the...
Will borax, soda ash, or potassium nitrate in molten form harm them much? Do they need to be seasoned (read babied) like melting dishes. The reason I ask and not just try and see what happens is that I have some melts to melt into a beads for a couple people that have been very patiently waiting on me to have some free time to get thier …
Many people sell their old or scrap gold jewelry for extra money or just to be free of the extra clutter in their jewelry box. This unwanted gold can be melted and used to make a large variety of …
Then the excess mercury is burned off, I think the ratio of precious metal to mercury is something like 1/5. Then the mercury is burned off when the gold is melted. The borax was only used after the gold had been extracted. At best the borax was used to refine impurities, not extracting the gold.