The scorifier is removed and the metal transferred to the cupel.
From the en.wikipedia.org
The cupel should be heated at the same time.
From the en.wikipedia.org
Alteratively the ore can be smelted in a triangular crucible, and then have lead mixed with it when it is added to the cupel.
From the en.wikipedia.org
The cupel is placed in the furnace and copper is separated into the lead which forms lithage in the cupel leaving the noble metal.
From the en.wikipedia.org
Another vessel used for the same process is a scorifier which is similar to a cupel but slightly larger and removes the lead and leaves the noble metals behind.
From the en.wikipedia.org
More examples
Bone-ash cup: a small porous bowl made of bone ash used in assaying to separate precious metals from e.g. lead
(cupels) Heat-resistant ceramics used in assaying.
(CUPELS) An acronym for Centre for University Preparation and English Language Studies. CUPELS offers programmes of study for students for whom English is a second or additional language. Some CUPELS programmes prepare students for degree-level study.
A small cup, shallow and porous (such as burned bones) used in assaying gold and silver.