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cupellation

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Cupellation - Wikipedia
Cupellation 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. en.wikipedia.org
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Cupellation | Refining, Assaying, Smelting - Britannica
Cupellation, 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 ... www.britannica.com
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CUPELLATION Definition & Meaning - Merriam-Webster
The 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 ... www.merriam-webster.com
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cupellation
cupellation (kjuːpəˈleɪʃən) Also 8 copp-, cupp-. [f. cupel v. + -ation, after F. coupellation.] The process of assaying or refining the precious metals in a cupel; the separation of silver from argentiferous lead, on a large scale, on a cupel.a 1691 [see cupelling b]. 1750 Phil. Trans. XLVI. 586 Tha... Oxford English Dictionary
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Cupellation - from cupel to SILVER bead - YouTube
DIY fire assay - refining without acids Silver cupellation - the full process. Cupel is made from dry portland cement . www.youtube.com
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CUPELLATION & Silver Assaying - 911Metallurgist
Cupellation is at once the neatest and the most important of the dry methods of assaying. Its purpose is to remove easily oxidisable metals, ... www.911metallurgist.com
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Basic Info | Fire Assay
An additional advantage of microcupellation is that it takes less time than conventional cupellation. CUPELLATION. Show Cupellation. The cupel is a shallow ... fireassay.eu
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Cupellation and the Birth of Precious Metal Refining
Cupellation is a refining process used to extract pure gold from lead ores. Learn more about how cupellation works by reading our blog post. www.mgsrefining.com
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Cupellation – Antique Jewelry University
Cupellation is used to either indicate a precise, analytical method of metal purity testing or a certain way of refining precious metals. www.langantiques.com
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[PDF] Initial experiments on silver refining: how did a cupellation furnace ...
Cupellation is a refining process for noble metals such as gold and silver. Still used in assaying, it was used as well on a larger scale in the metallurgical ... www.hmsjournal.org
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coppell
▪ I. coppell var. of copple, Obs.▪ II. coppell, -ation obs. f. cupel, cupellation. Oxford English Dictionary
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Cupel
Cupel may refer to: A porous pot used in cupellation Cupel, Białobrzegi County in Masovian Voivodeship (east-central Poland) Cupel, Legionowo County in wikipedia.org
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decupelation
† decupeˈlation Obs.—0 [cf. cupel, cupellation.] ‘The same as Decantation.’1706 in Phillips (ed. Kersey); hence 1721 in Bailey, etc. Oxford English Dictionary
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Refining (metallurgy)
Lead Cupellation One ancient process for extracting the silver from lead was cupellation. limited by the lead-silver eutectic and typically the process stopped around 600 to 700 ounces per ton (approx 2%), so further separation is carried out by cupellation wikipedia.org
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cupelling
cupelling, vbl. n. (ˈkjuːpəlɪŋ) [f. cupel v. + -ing1.] = cupellation.1644 Digby Nat. Bodies x. (1657) 102 In the coppelling of a fixed metal. a 1691 Boyle Wks. III. 453 (R.) The quick melting down of ores, and cupelling of them. b. attrib. and Comb., as cupelling-fire, cupelling-furnace.a 1691 Boyle... Oxford English Dictionary
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