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  • Guidelines on flux calculation gold smelting Laboratory Testing .

    Apr 4, 2017 . I am currently using Borax, Silica flour, Soda ash and Potassium nitrate, the sludge contains also copper, I need a guideline on flux calculation to use in order to move the copper or any other Base metal to the slag. I would like to know more about flux calculation for gold smeltin.

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  • Using Borax Flux to Refine Gold MGS Precious Metals Blog

    Aug 7, 2013 . When most people hear borax they think about laundry. But at Manhattan Gold & Silver, we think about gold refining. That's because this mineral does more than wash clothes it's an important flux in metallurgy for separating gold from slag. You've probably seen borax in the detergent aisle, but it has.

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  • Borates in gold metallurgy Borax

    Refining of pure gold from bullion. Bullion ingots are melted in clay crucibles under an anhydrous borax cover. Oxygen is passed through the metal which then forms oxides of the impurities. These oxides dissolve in the Dehybor cover and produce a fluid borate slag. This slag is periodically removed and replaced with fresh.

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  • Borax Use in Gold Metallurgy AB Etiproducts OY

    The borax method for extracting gold is a greener, more sustainable method that offers better overall economics and . generates higher efficiency of gold extraction and fewer health and environmental con sequences. Looking Back. Borax and . It also lowers the melting point of the slag so as to keep it fluid and pourable.

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  • Melting Gold Precipitate 911 Metallurgist

    Mar 18, 2017 . For melting raw precipitate from clean gold solutions the following charge will usually give rapid fusions and clean, fluid slags. 75 lb. precipitate (15 to 20 per cent moisture). 50 lb. borax. 45 lb. manganese dioxide. 25 lb. silica sand. Note: Soda bicarbonate or fluorspar may be substituted for part of the borax,.

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