miller process of refining gold ppt
Miller process - Wikipedia
The Miller process is an industrial-scale chemical procedure used to refine gold to a high degree of purity (99.5%). It was patented by Francis Bowyer Miller in 1867. This chemical process involves blowing chlorine gas through molten, but (slightly) impure, gold. Nearly all metal contaminants react to form chlorides but gold does not at these high temperatures. The other metals volatilize or form a low density slag on top of the molten gold.
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Melting and Refining of Gold - Home - Springer
CHAPTER 11 Melting and Refining of Gold Refining of gold comprises the following sequence of operations: melting, refining, de-golding, and electrorefining. Melting gold
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Gold processing - Refining, Smelting, Purifying Britannica
Gold processing - Refining, Smelting, Purifying: Gold extracted by amalgamation or cyanidation contains a variety of impurities, including zinc, copper, silver, and iron. Two
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Recent advances in gold refining technology at Rand
2005.1.1 The Miller process can produce marketable 9950 grade gold and meets the majority of the above-mentioned criteria. However, the subsequent process of
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Miller process ore refining Britannica
Miller’s process of refining impure gold with chlorine gas (patented in Britain in 1867) and Emil Wohlwill’s electrorefining process (introduced in Hamburg, Ger., in 1878), it
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Process technology development at Rand Refinery - ScienceDirect
2005.7.1 Rand Refinery uses the Miller chlorination/Wohlwill electrolysis method of refining mine rough bars and jewellers’ scrap, and has recently confirmed the existing
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Process technology development at Rand Refinery
2005.7.1 Miller chlorination was chosen as the primary refining process as it can produce molten gold of sufficient purity for pouring into saleable bars within 2 h. Wohlwill
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