I was quite surprised to read an article about gold investors (small scale) in China buying these gold beans. Small shot weighing about 1/13th of an ounce...
There is a great opportunity to do gold refining in India: IFSCA Chairman. He said that there is a scope for moving up the value chain in the sector besides being a trading hub of gold. "Being a ...
Hey guys I have been in this forum from quite long time and I will be processing honeycomb catalytic converter petrol and Diesel type. I have studied "Matthew Wang China catalytic converter refining book" and already started reading C.M Hoke book and I will be ordering Lasersteve CD soon through my uncle located in US since Steve …
Jun 30, 2022. #6. GoldTJ said: So, For this 1st batch, I've use. 500ml of distilled water, (I now use tap water for this step) 25g of EcoGoldex. Heat and stir at 80oC >30min. Eco goldex never completely dissolve, and Magnetic stirrer couth a lot of Magnetic material.
My favorite is to refine gold and I love collecting pieces. I love talking to folks at sales. Most time people are looking for new jewelry to wear. I dont tell them that I'm there to buy jewelry to refine just they dont offended that I might destroy the jewelry. This whole thread is insane. I think someone is a little over-sensitive.
Hello everybody I'm KC, and I'm fairly new to the world of gold refining due to financial situations I started to look to the Earth for answers to my problems and I stumbled upon what I assume is a literal gold mine. Since the discovery of said oars I have crushed by hand with a hammer many...
In India, There are two types of Catalytic converter or Ceramic of converter available in the market 1. Petrol Catalytic Converter 2. Diesel Catalytic Converter The Price of Both the Catalytic converter varies from each other.So would request to please explain the difference between...
Our group is a hub for discussing the economic and environmental aspects of metal refining, including gold market trends, sustainable practices, and safety protocols in refining operations. Engage with experts on the recovery of precious metals from electronic waste, jewelry scrap, and mining ore.
Hi guys, Ive got a couple of questions regarding cementation from my waste tank. I have been reading the 'dealing with waste' in the Library. My waste contains HCl and used up Nitric, im dealing with mostly 'clean' ceramic e-scrap. No boards, no burnt stuff/ash. There should be traces of...
Location. USA. May 27, 2024. #1. I processed a lot of older ceramic CPU's, 486, Pentium Pro, etc. The picture below is the legs that came off of the CPU's by soaking in nitric acid. Later I added some HCL. A lot of silver chloride was formed. When I filtered out the gold legs from the CPU's they were all plated with what I think may be palladium.
When In Doubt, Cement It Out This is advice I often give to new members who find they've created a bit of a mess, and they're wondering how to recover their values (gold, silver, PGMs, etc.). Perhaps they've followed a process they've seen on YouTube that left out some important details...
Hello everybody, We are ready to supply 100-200 kilo of gold in bars, purity 23-23.5 carat from our concessions. We are looking for LBMA certified refinery in Europe.
The gold compound in all modern acid gold plating baths is KAu (CN)2 and most operate at a pH of from about 4.3 - 6.0. If the pH is allowed to go below about 3.5, the canary yellow AuCN precipitates, which is insoluble in strong acids.
I'm currently in the process of trying to dissolve my gold foils in aqua regia. I started with 400 ml 31.35% HCl and I incrementally added 67% nitric until I saw foils beginning to dissolve. I've had the solution on a medium boil for about 25 minutes. It appears that the solids have dissolved so...
I think I want to help with some common mistakes made by newbies. This first post shall be about cuppellation mistakes: Cracked cupels and glassy beads. Wither one uses bone ash or magnesite cupels in assaying, there are a few things that should be done. Store your cupels in talcum powder. This keeps them bone dry and so prevents …
Hi guys.. well i have a problem to discuss with you. i add hydrazine hydrate to precipitate gold. I could not judge how much of hydrazine hydrate should be used to precipitate the aqua regia solution. is there any calculation to know the exact amount of hydrazine hydrate for the AR containing...
I need some nitric acid please... I'm only refining at most 20 grams of recovered gold.
For silver it's better to use warm water about 40° C and place the drilled crucible not too close to water surface but about 20 cm above the water. 1.5 or 2 mm hole diameter is preferred. Drill holes in angled manner not vertical. 4metals said: If the water got too hot some of the shot turned into spaghetti shapes.
Recently, i have been having problems with getting gold vacuum pin tube samples. I am having a problem with the glass melting before the the bulb breaks. Any suggestions?
Salve a tutti i membri di questo meraviglioso Forum. Da sette anni sono dentro questo lavoro. In questo periodo, volendo provare il sistema Argento/tiosolfato, ho incontrato diversi problemi. Dove posso trovare la procedura completa e chiara di come lavorare Argento/Cloruro di Argento e...
According to the WGC report titled 'Gold refining and recycling' from 300 tonnes in 2013, India's gold refining capacity increased by 1,500 tonnes (500 per cent) in 2021.
Hey guys, i came on the forum to ask a question about some refining im doing wrong. I do have some chemistry from college but i suck at it. I have been looking into and wanting to refine some gold for a few years as it is kinda relevant in terms of my degree. Anyway, this is what i did wrong. I...
1. Read C.M. Hokes book on refining jewelers scrap, it gives an easy introduction to the most important chemistry regarding refining.
Melt the metal as usual, take some powerful torch and heat that top edge strongly, while tilting the crucible in a way molten metal can reach the drilled area and start to flow through holes. Tilt the crucible carefully, as it is easy to "over-tilt" it, and then you will pour the bulk without passing through holes.
Hello everyone,, My name is John and I am new to this forum and look forward to positive interactions here. I live in the mineral belt of Colorado and have found many telluride samples, nuggets in the river, mustard sponge Gold and what seems to be archean green gold on friends property here...
To absorb oxigen,silver must be in colloidal form,not ionic form.Ionc forms of silver are all the silver dissolved compounds that we know,i.e. silver nitrate in water,silver sulphate in hot water,silver chloride in sodium thiosulphate solution and so for.Many products labeled as "colloidal silver" are not colloidal silver,you can check the ...
A friend of mine kept a nugget from near Dalonega, Ga. for years, may still have it, that weighed just over one Troy ounce. He found it over 25 years ago. The gold rush in Georgia was such that a set of gold coins were made there.
On March 19, 2008, Tony Winnett, 55, inhaled mercury vapors while trying to extract gold from computer parts (by using liquid mercury to separate gold from the rest of the alloy), and died ten days later.
After lurking on this forum for over 10 years, I finally have something worthy of a post. This week, I picked up an old Hammond H-300, and harvested 10.5 grams of palladium from just the busbars alone. I have been taking apart scrap Hammonds for over a year now, and have taken apart over a dozen or so. This H-300 has by far the most …
Mo. Apr 16, 2024. #1. Hello I'm trying to use sodium nitrate + sulfuric acid to make 70% nitric acid. I understand the formula is a 2-1 mole = 1-2 mole nitric. But I can not get this to turn out right. If I add 1700 grams of sodium nitrate and 850 grams of sulfuric acid and 550 grams of water this should give me almost 2 liters of nitric acid ...
Hello all, While browsing the internet i stumbled upon a product that claims to be a substitute for Nitric Acid in Aqua Regia. This Chemical is called MX3, but im having trouble determining the actual contents of the white powder that claims to be "A superior, dry, non-hazardous substitute for...
