Keyword Analysis & Research: cupellation
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Cupellation - Wikipedia
https://en.wikipedia.org/wiki/Cupellation
WEBCupellation is a refining process in metallurgy in which ores or alloyed metals are treated under very high temperatures and subjected to controlled operations to separate noble metals, like gold and silver, from base metals, like lead, copper, zinc, arsenic, antimony, or bismuth, present in the ore.
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Metallurgical assay - Wikipedia
https://en.wikipedia.org/wiki/Metallurgical_assay
WEBCupellation: the lead bullets are placed in porous crucibles (cupels) of bone ash or magnesium oxide and heated in air to about 1,000 °C. This is usually carried out in a 'muffle' furnace, containing a refractory muffle (usually nitride-bonded silicon carbide) heated externally by silicon carbide heating elements.
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Cupellation | Refining, Assaying, Smelting | Britannica
https://www.britannica.com/technology/cupellation
WEBcupellation, separation of gold or silver from impurities by melting the impure metal in a cupel (a flat, porous dish made of a refractory, or high-temperature-resistant, material) and then directing a blast of hot air on it in a special furnace.
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Roman metallurgy - Wikipedia
https://en.wikipedia.org/wiki/Roman_metallurgy
WEBThe Romans utilised a sophisticated system to separate these precious metals. The use of cupellation, a process developed before the rise of Rome, would extract copper from gold and silver, or an alloy called electrum.
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Cupellation Definition & Meaning - Merriam-Webster
https://www.merriam-webster.com/dictionary/cupellation
WEBThe meaning of CUPELLATION is refinement (as of gold or silver) in a cupel by exposure to high temperature in a blast of air by which the unwanted metals are oxidized.
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Cupellation - Oxford Reference
https://www.oxfordreference.com/display/10.1093/oi/authority.20110803095653549
WEBOverview. cupellation. Quick Reference. A method of separating noble metals (e.g. gold or silver) from base metals (e.g. lead) by melting the mixture with a blast of hot air in a shallow porous dish (the cupel). The base metals are oxidized, the oxide being carried away by the blast of air or absorbed by the porous container.
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Cupellation: The oldest quantitative chemical process
https://pubs.acs.org/doi/10.1021/ed062p668
WEBCupellation: The oldest quantitative chemical process. Jerome O. Nriagu. Cite this: J. Chem. Educ. 1985, 62, 8, 668. Publication Date: August 1, 1985. …
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Some problems and potentials of the study of cupellation remains…
https://journals.openedition.org/archeosciences/948
WEB1 Cupellation is a high-temperature metallurgical operation aimed at refining the noble metals contained in a larger metal matrix, normally dominated by lead. The metal is melted under oxidising conditions so that the lead is oxidised to litharge (lead oxide), which acts in two ways (Bayley 1991: 125): it oxidises any other base metals present ...
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Cupellation - chemeurope.com
https://www.chemeurope.com/en/encyclopedia/Cupellation.html
WEBEncyclopedia. Cupellation is a process used to separate noble metals such as gold or silver from base metals such as lead. It is often used to assay gold in order to test its purity. Sometimes cupellation is called "fire assaying." It was formerly the usual process for extracting silver from lead.
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Cupellation | SpringerLink
https://link.springer.com/referenceworkentry/10.1007/978-981-19-0740-1_580-1
WEBMay 23, 2023 · Cupellation is a technique of separating silver and lead in the ancient silver smelting process. Silver is often associated with other nonferrous metals, and silver ore contains very little silver so it needs to be separated and purified.
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