CUPELLATION


Meaning of CUPELLATION in English

Separation of gold or silver from impurities by melting the impure metal in a cupel (a flat, porous dish made of a refractory material) and directing a blast of hot air on it in a special furnace.

The impurities, including lead, copper, tin, and other unwanted metals, are oxidized and partly vaporized and partly absorbed into the pores of the cupel.

Britannica Concise Encyclopedia.      Краткая энциклопедия Британика.