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 ?
Impure silver ingots from the reverb furnaces are fed to the cupels.
Then upon the sacred boulder sprang up the church But the edges of the canal of sacrifice remain, And a nearby cliff Portrays a tangle of signs, A sun with its rays Or a deep sunflower Turned by the heart at night Toward the inclined cupels Filled with wax.
The development of a pyrometallurgical process for the recovery of lead oxide from the cupels used in the fire assaying of precious metals is described.
At Korea Zinc for example, a BBOC has replaced two cupels with the following benefits: reduction in refining cycle time from 10 days to 2 days; fuel consumption to 10% of original; silver inventory from 4 to 1.