The four major PGM mining companies, namely Anglo Platinum, Norilsk, Impala Platinum, and Lonmin Platinum, all South African apart from the Russian Norilsk, are integrated
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· I am working on adding the Platinum and Palladium refining into my current Au&Ag refining process these days, and I have a few questions about the purification of platinum. My materials are usually Gold 50%, Ag 10%&lower, Pt/Pd, a lot of copper My steps are: 1. Aqua regia dissolving, remove Ag
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· Don't expect them to contain much platinum----although that's not intended to discourage you. They are worth processing, but it takes a large number of them to yield an ounce. I would expect you'd have about a half ounce in 200 plugs. Please let us know what you discover if you explore them. Harold.
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· Platinum, not forming a hydroxide remains in solution for further refining. Digest the impure sponge and destroy the nitrates by classic evaporation to syrup to drive off the excess nitric. Dilute the syrup with HCl to a concentration of 1.75 troy ounces of Platinum per liter of solution for hydrolysis.
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· Just AuPt alloy ? nothing else ? If this is the case, after gold precipitation, go for platinum metal directly, do not precipitate the salts-management of the process would be much easier. You can conveniently use zinc metal if you aren´t going for 3N+ metal-as traces of zinc evaporate at very high temperatures required for platinum melting.
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· The gaseous acid diffuses though, and immediately passes through the substrate. The gaseous acid is condensed at the top of the column, where it drips back down. The guy successfully (claims) he recovered 98% of Pt, Pd, and 93% of Rh with this method, on an aftermarket, and on an OEM.
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· Please calculate the areal/gramm of platinum yield, when you start your experiments. By the way, when I did my researches on china gold plate, I read, that sometimes rhodium is used as primer. Probably microscopic amounts. When the gold dissolved, I found that some pieces still had a very slight discoloration. L.
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· It was stamped with the word-Platinon and a patent number: 250885. A google search recently revealed it was a United States Patent 250,885 Issue Date: December 13, 1881 Current U.S. Class: 105/222 ; 105/226; 384/597 Current International Class: B61F 5/00 (20060101) although I could not find the actual patent.
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· 26. Location. Washington State. Nov 20, 2023. #1. 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
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· If you don't have a cell then you can also: 1-Use sulfuric acid for digestion of the silver. The Pt stays as black powder. If there is Palladium some of it dissolves, some stays with the Pt depending on %. 2-If you insist in using nitric acid, you can drop the AgCl with table salt, filter the solution clear of AgCl, and then cement the Pt with
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· Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. Selling Platinum from Ore Anonymous Nov 14, 2007 2 Replies 28 Views 11K
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· Feb 25, 2007. Messages. 8,360. Jul 21, 2009. #8. Lou said: Acetylene is last. When choosing acetylene for melting platinum, there's a risk of forming carbides, which render the platinum hard and brittle. If an acetylene torch is your choice, be certain to run with an oxidizing flame, not a reducing flame.
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From the outset Johnson Matthey has been associated with Rustenburg, first in developing methods for the extraction of the platinum metals from these ores, and thereafter as
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· Yggdrasil said: Since Pt melts at 1770 C and maximum operating temperature for Alumina crucibles is around 1750 C. I guess it was just overheated. Regarding clean up, maybe hot concentrated NaOH. But that is a flesh eater so be careful. I hope someone else has something. less dangerous to suggest.
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· Nov 27, 2011. #4. Joeforbes said: The Platinum will absorb the Carbon. That's not true. Non of the heavier elements of the family (Pt,Ir, Os) will form Carbides at these conditions, nither will absorb Oxygen. That in includes Gold as well. With the lighter metals of the family (Pd, Rh, Ru), With the exeption of Rh, Carbides and oxides does
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: sreetips · I dissolved a very small amount of the suspected Platinum metal in a test tube of hot AR. I filtered the orange colored solution and rinsed the filter throughly. I added approximately a 1/4 teaspoon of solid ammonium chloride. I evaporated the solution with heating until the orange powder formed along with solid ammonium chloride crystals.
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Mineable platinum group metal (PGM) deposits are rare and found in relatively few areas of the world. At the same time, the use of PGM is predicted to expand in green technology and energy applications, and PGMs are consequently currently listed as European Union critical metals. Increased mineralogical complexity, lower grade ores, and recent PGM
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· This is a great forum. Thank you so much for providing it. I am recovering platinum from ore rather than scrap and I have a few questions that I am hoping some of the platinum experts here can answer. Basically, what I have is an ore that is very high in metallic platinum. I have a proprietary
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· The small refiner we work with charges 8% for processing (<20oz) based on the London spot and is not particularly interested in PGMs. Volumes of 20oz or more are charged 5% processing fees. What is a typical operating margin for net purchasers of gold.
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· I have two 2 ounce jars with an assortment of small black Plàtinum Nuggets, crystals, vein material and rich ore specimens tumbled that look similar to nuggets. The first jar contents weigh 115 grams. They also contain what I believe is tiny pieces of Osmium that is black, shiny and very hard.
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· May 14, 2021. #1. Hi, I had a catalyst that I kept on the heat in aqua regia for several hours, and after a while I filtered it and put a drop of that solution on a piece of paper and tested it with tin chloride, which turned blue, then the whole chloride solution. I applied ammonium which precipitated a yellow powder, then I filtered this powder.
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· Jul 5, 2010. #4. Reduction of Ammonium Chloroplatinate to Platinum metal using Hydrazine hydrate. Add DI water to the Pt salts to yield 1 gram of platinum (which equals 2.3 grams of ammonium chloroplatinate) per 20 ml of water. example 100 grams of ammonium chloroplatinate divided by 2.3 = 43.478 grams x 20 ml/g Pt equals
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· 1) Extraction. Miners target platinum group metal (PGM) deposits, which include platinum along with other metals like palladium and rhodium, extracting the ore through drilling, blasting, and hauling processes. The initial extraction is just the beginning. The ore must then undergo a series of processes to separate platinum from other
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· Abstract The results of platinum extraction from a low-concentration nitric acid platinum-containing solution by sulfide and electrolytic precipitation are presented. The problem of the study is the question about a possibility of platinum(IV) extraction from refining nitric acid mother liquors of a complicated ionic and quantitative composition.
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· I do not know if you ever seen platinum, but I never seen ANY tarnished, black or gray platinum. Even yellow-hot platinum still have recognizable luster and shine. And it is not nearly black or even hint of darker grey colour. Platinum is
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· 5,560. Location. birmingham. Jun 8, 2024. #41. Wal please keep us updated , I have encountered some very weird uses of PMs in general so I wouldn’t be shocked to find out you were right, it’s only the taxpayers money been wasted so who cares about cost. Christian333.
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· Refining Other Metals Platinum, Palladium, Rhodium, Iridium, Osmium . Platinum Metals and their Alloys Thread starter AgAuPtRh Start date Mar 19, 2007 Help Support Gold Refining Forum: This site may earn
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· Hi everyone. I am receiving these 4 samples of rock that contains both Platinum and Osmium. There was a chemical analysis done in Madagascar a couple years ago on a lot of these ores, and it came to show the results below: Zr-7001 B Spectr AA-% (m/m)-0.001 Os-7000 B Spectr AA-% (m/m)-56.31 Pl-7000 B Spectr AA-% (m/m)
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· I've got a Pt coin and I want to do a practice refining, and I want to shoot a video of it. This'll be my first time doing Pt. I've already rolled it thin 0.24mm and cut into strips and twisted as per Hoke. I'll start be incinerating to burn off any oils. I plan to dissolve in hot AR, then
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· Sep 13, 2012. #5. Franciz, I’m sorry it took me so long to reply. No matter whether you use Aqua Regia or HCl/Cl2, platinum will be slow to digest in massive form. As stated I like to avoid nitric because it can cause additional work further down the recovery/refining process with many types of scrap. For 10 grams if you started with 300
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