cupel


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Synonyms for cupel

a small porous bowl made of bone ash used in assaying to separate precious metals from e

References in periodicals archive ?
The cupel bag house dust containing the antimony is also being stored.
As the cupel is subject to corrosion from the lead oxide it is dressed with bone ash or other porous material capable of absorbing the oxidation products.
The slag is discarded while the button is subjected to cupellation, during which the precious metals are separated from the lead and other metallic impurities during a melting process which takes place in a flat porous dish made of a refractory material called cupel, onto which a blast of hot air is directed in a special furnace.
A reaction rate 15-20x that of a conventional cupel which leads to reduced cycle times, volume requirements, and precious metal inventories.
Tenders are invited for Procurement Of Crucible And Cupels
Wrapped samples are placed on porous blocks, known as cupels, and when in the furnace the cupels absorb the lead and any base metals as oxides.
Costs, including those associated with cupels, furnaces, chemicals, power consumption, and the environment, are considerably reduced.