Patent ID: 7976771

Claim:
An inductively heatable shaft furnace for reduction of metallic slags, wherein said shaft furnace is adapted to be charged with a lumpy coke bed, and is comprised of an electrically insulating refractory material, and wherein a temperature gradient of said shaft furnace is adjustable, comprising at least one head-side induction body arranged on a head side of said shaft furnace; a suction connection arranged in an axial region of said shaft furnace located below said at least one head-side induction body, and in which a prevailing temperature is above a condensation point of noxious substances to be removed; and an opening positioned on a tap end of said shaft furnace for tapping metal regulus and slag melt, wherein said shaft furnace, in said axial region located below said at least one head-side induction body, comprises a region with an enlarged diameter.