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The authoritative public forum for Metal Finishing 1989-2025 -----Fineness of Gold is Lower After Smelting. Q. I would like to know why when I send gold bullion (60-88%fineness) for refining, the refiner smelt and give a new weight (always lower than the weight we sent, e.g 4020 oz will give say 4005 oz - lost 15 oz).
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Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. M. midaselm Active member. Joined Jan 24, 2013 ... The thing to remember …
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What's your guys' average yield when refining scrap karat gold? I just did a batch today and got a yield of 94.2% and was wondering if thats in the ballpark of being acceptable? Granted I do have some AR filers that are covered in solution and apparnelty i missed a tiny bit of gold dust, which I still have sitting in my beaker.
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I would be glad to help you. Here are the basics: I will assume you are refining karat scrap - scrap 14k 10k 18k jewelry items. This process is not for refining gold plated or gold filled items - get Lazer Steve's video for refining gold filled scrap - …
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Best and Easiest way to refine gold dust to get 99.9% purity. No passwords, No popups, No cost, No AI: ... Your 10,14 or 18 carat gold contains alloy; it has silver in an alloy. ... but I do see it reported on thread 15854 that, because the value of iridium is far lower than gold and nitric acid does not dissolve iridium, scammers in India are ...
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Our customer's bought gold filled but melted it into bars and mixed them into larger karat gold lots. Their reason was we kept our rates the same for karat gold as long as the assay was above 35%. So they had room to throw in gold filled bars and get the lower karat rate than paying higher rates for gold filled.
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Gold refining can be achieved through various methods, each suited to specific requirements and scales of operation. 1. Miller Process. Removes contaminants from molten …
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Reclaim, recycle and sell your gold-bearing scrap for the highest price. GoldRefiners is part of Specialty Metals Smelters & Refiners LLC, the best gold refiners in the US for 32 years.
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Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. 1; 2; Next. 1 of 2 Go to page. Go. Next Last. C. ... In general, the lower karat gold has a larger percentage of silver than the higher karats. I got rid of it in the 10K (the worst) with the nitric. Most of the ...
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I am roughly 95% certain the gold I have is 24 karat. I've refined it twice, boiled the dust in HCL, and washed it in boiling water several times. If I had to guess it's about 1oz of gold, its about the size of a quarter, but thicker. It's collected as a sort of solid but you can break it...
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Gold Dust Refining Machine #golddust #goldrefining #goldrefinery #gold https://bit.ly/3zTTtx5
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AR Recipe 2= Poor Man's AR = 8 oz Sodium Nitrate (added in small increments),(aka Subzero), 480 ml water, 960 ml Muriatic Acid plus heat. Used to dissolve high karat gold, gold powder, gold foils, dissolves Platinum when hot. Excess nitric must be evaporated off neutralized with Urea to pH 1 +/- 0.4, then drop gold with SMB.
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(2) To speed things up and dissolve of the gold, you can first inquart the karat gold (reduce to 25% gold) with copper or silver, dissolve in nitric, pour off the nitric and rinse a few times, and treat the remaining gold powder in a much smaller amount of aqua regia. This process will take about 4 hours, after the gold has been shotted.
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As Nick and others have quite rightly pointed out you don't have "good" 9 carat gold any more. Refine it back to fine gold and then add the required base metal to make it 9 carat again. Reply. $8.99. 5 Pack Jewelry ... Theoretically could I add some silver and make it back into a lower carat alloy with more volume? Reply. J. Jellybaby Member ...
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To effectively purify gold, understanding its initial purity is crucial. This knowledge guides the choice of purification methods. For example, refining low-karat gold might require different …
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Gold Jewellery Refining Machine is mainly used to obtain fine gold, and silver from fillings, polishing, and dust. It is manufactured by a team of sincere personnel using latest machines and technologies. It has a sturdy construction …
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the white gold alloy we use contains 20%silver of alloys wt. what is the best method for recovering pure gold from dust batches (filing dust, setting dust,polishing dust) our factory manufactures jewelry in sterling silver also.so silver dust also gets mixed with karat gold dust.
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Sorry if I am being silly but how do you go about using specific gravity to calculate carat of dust sample; would the presence of unknown impurities make using specific gravity an inappropriate technique. I have seen a calculation preformed using specific gravity of a …
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Hello everyone, I just did a few tries with an home made karat cell. Here is what I did: Current: 1A MAX Voltage: 7.5V graphite cathode 10k gold anode Aqueous solution: NaCl (regular table salt, ionised) As soon as I started the current, bubbling started. But I notice a Chlorine smell so I...
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Refining not only enhances the value of gold but also contributes to ethical and sustainable practices by recycling old jewelry and other gold items. Why Gold Refining Matters : Gold refining plays a pivotal role in several industries and has far-reaching benefits: 1.Purity Assurance : Ensures gold meets quality and karat standards for ...
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Phil, lets say I had a gold nugget from panning and I wanted to refine it. Since it is about 16 to 18.5k gold I would most likely inquart it, (melt it with silver to lower karat), (at 18% I might be able to just use nitric without inquarting, but to insure I got all the base metals, I would "quarter" the gold with silver).
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Gold processing - Refining, Smelting, Purifying: Gold extracted by amalgamation or cyanidation contains a variety of impurities, including zinc, copper, silver, and iron. Two methods are commonly employed for purification: the Miller process and the Wohlwill process. The Miller process is based on the fact that virtually all the impurities present in gold combine with …
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I've seen a couple post here asking what the expected yield should be for gold filled jewelry. I just wanted to show some calculations I did on a small batch of 53.11 grams i …
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Gold Refining Plant. This gold refining plant is able to treat from 300 gram. up to 10 kg. of starting gold alloy. You are able to produce 99.99% pure gold (Au) in a single step within a production cycle that can last from 5 to 8 hours, from the preparation of …
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The use of the term inquartation involves the melting and alloying of high karat gold alloy, lowering it to roughly 25% (6K). ... higher than 10% are diluted by pieces of lower silver assay allowing this process to be more versatile. This process is effective for larger scale refining where the customer is paid on assay so you own the gold you ...
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I am wondering if it is best to collect gold dust from the bench in separate containers based on karat, or if it is alright to mix dust from all karat types into one contai… Hello all, this is my first post in this forum. ... For refining you can mix all karats and colors of gold together. It all goes into one batch at the refiners.
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To assess and refine the gold, the refiner will need to separate the gold from the other elements and determine how much of each substance there is and what they're worth. The most commonly used and one of the most accurate …
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With sampling, the idea is to select representative samples, those that will give a reasonably true representation of how much gold is actually in the entire lot. Sampling require ingenuity and knowledge and various types of material can require different approaches As 4metals does, I prefer 3 samples on anything important like karat gold.
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After disolving the gold fill completely in the AR, the solution's color was dard brown, almost black. When I have used AR to dissolve previous batches of high karat gold the resulting solution was nut as deep brown, almost black color as when I …
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