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Gold Refining Process by Aqua RegiaThe Gold Refining Process by Aqua Regia was introduced at the Pretoria Mint after the Miller process had been tried and abandoned owing to the alleged difficulty of treating the gold bullion extracted by the cyanide process...know more

How to Refine Gold (with Pictures) - wikiHowEdit Article How to Refine Gold Six Parts: Melt the Gold Add the Acid Add Urea and Precipitant Test the Acid for Dissolved Gold Cleaning the Gold Reconstituting the Gold Community Q&A You may want to make some extra money by refining your own gold at home, or you may be a jeweler who wants to refine gold in-house...know more

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Recovery and Refining of Gold Jewellery Scraps and WastesThe next step is the extraction of gold from the solution by a selective chemical reduction There are many suitable reducing agents for this purpose: ferrous sulphate, sulphur dioxide gas, oxalic acid, hydrazine, formaldehyde, sulphite and sodium bisulphate and so on (Corti, 2002)...know more

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