Electrolytic Refining - Mining Fundamentals

The electrolytic process is similar to , except that the anodes are dissolved in a nitric acid bath. The resulting will be about 99.9% pure. Copper – The extraction of copper from other ores through involves the deposition of copper on the cathode, and using lead-coated anodes.

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  • Gold extraction -

    The of from has been done since ancient times starting in Lydia in the 6th century BC. Various techniques have been practised salt cementation from ancient times, using distilled mineral acids from medieval times, and in modern times using chlorination using the Miller process and using the Wohlwill process .

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  • Gold processing - Refining | Britannica

    The Wohlwill process increases purity to about 99.99 percent by electrolysis. In this process, a casting of impure is lowered into an electrolyte solution of hydrochloric acid and gold chloride. Under the influence of an electric current, the casting functions as a positively charged electrode, or anode.

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  • Removing green copper oxides with Electrolysis, chemicals ...

     · Their experiences are only with and . No one use copper or brass in jewelry. Hence the reason I need to be familiar with all kinds of cleaning especially chemical is to make sure they wont ruin it. Or know what they are exactly doing. They may try their techniques in cleansing and to it and it may not be compatible.

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  • GOLD alloyed with PALLADIUM and SILVER: parting and ...

     · palladium alloy: and refining - sodium oxalate Palladium - DMG - sodium formate

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  • Process for purifying silver refinery slimes - ASARCO ...

    The refinery slimes generally contain mostly and with minor amounts of platinum, palladium, rhodium, iridium, copper, seleium, tellurium, , lead and bismuth. A preferred preliminary treatment is to decopperize the slimes and this may be performed using any of the known techniques.

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  • purifying copper by electrolysis

    Purification of . The Moebius Process of Purification of is now in successful operation and is said to be specially suitable for refining copper bullion containing large proportions of and with small quantities of lead, platinum, and other metals, but is chiefly used in dore containing not more than 20 per 1,000 of base metals.

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  • Electroplating - Activity

    Next, reload the model. This time, add a electrode as the anode and the spoon as the cathode. Connect the spoon to the circuit, but leave it sitting outside of the bath. Fill the bath with the nitrate solution, then close the switch. Finally, dip the spoon into the bath and allow electroplating to take place for about 30 seconds.

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  • Processing, smelting and refining gold | World Gold Council

    The Wohlwill process increases purity to about 99.99 percent by electrolysis. In this process, a casting of impure is lowered into an electrolyte solution of hydrochloric acid and chloride. Under the influence of an electric current, the migrates to a negatively charged electrode cathode, where it is restored to a highly pure metallic state, leaving the impurities as a separate solution or residue.

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  • Extraction of Gold

    The parting of from silver is effected by melting the raw product with sufficient to make the ratio of the to 1:3, or " quartering," the alloy being …

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