cupel

(redirected from cupels)
Also found in: Dictionary, Thesaurus.

cupel

[′kyü·pel]
(metallurgy)
A cup made of bone ash or magnesite, used in assaying precious metals.
Mentioned in ?
References in periodicals archive ?
Cupel slag is ground in a ball mill classifier circuit and injected with chlorine gas.
A reaction rate 15-20x that of a conventional cupel which leads to reduced cycle times, volume requirements, and precious metal inventories.
PHOTO : An assayer placing bone-ash cupels in an electric cupellation furnace.