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2020-6-8Smelted gold is then refined. Several refining processes are used in Australia - chlorination electrolytic and aqua regia. In the chlorination process Miller process chlorine is introduced to melted bullion in a crucible furnace.
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Processing smelting and refining gold World Gold Council. The two gold refining methods most commonly employed to derive pure gold are the Miller process and the Wohlwill process. The Miller process uses gaseous chlorine to extract impurities when gold is at melting point impurities .
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Best Practices in Gold and Silver Refining . Refining Processes Miller Chlorination Batch-continuous processes . Requires effective statistical process monitoring. Blending minimises gold assay giveaway Gold Value 0.40 per 0.001 Requires efficient laboratory support.
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Gold parting or parting process is the separating of gold from silver. Gold and silver are often extracted from the same ores and are chemically similar and therefore hard to separate.
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The diagram below gives an overview of the key processes involved in the refining of gold and silver.
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Processing smelting and refining gold World Gold Council. The two gold refining methods most commonly employed to derive pure gold are the Miller process and the Wohlwill process.
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2020-5-16Metallurgical ContentThe Chlorine ProcessGold Refining FurnacePreliminary RefiningThe Miller Process at the Sydney Mint The use of chlorine gas for the purification of molten gold was first proposed by L. Thompson and the results of his investigations were published in the Journal of the Society of Arts two years later.