cupellation

详细解释:n. 灰皿提炼法, 灰吹法
【建】 烤钵冶金法, 烤钵试金法

详细解释：

cu.pel.la.tion

n.（名词）
A refining process for nonoxidizing metals, such as silver and gold, in which a metallic mixture is oxidized at high temperatures and base metals are separated by absorption into the walls of a cupel.
烤钵冶金法：一种使银和金等金属不氧化的提纯过程，在高温下金属混合物被氧化，低劣金属被分离出来并吸入烤钵的墙上