Cupola

Cupola means a vertical cylindrical shaft furnace that uses coke and forms of iron and steel such as scrap and foundry returns as the primary charge components and melts the iron and steel through combustion of the coke by a forced upward flow of heated air.

Source

40 CFR § 63.10906

Scoping language

Terms used in this subpart are defined in the Clean Air Act, in 63.2, and in this section.