Smelting furnace

Smelting furnace means any vessel in which the smelting of copper sulfide ore concentrates or calcines is performed and in which the heat necessary for smelting is provided by an electric current, rapid oxidation of a portion of the sulfur contained in the concentrate as it passes through an oxidizing atmosphere, or the combustion of a fossil fuel.

Source

40 CFR § 60.161

Scoping language

As used in this subpart, all terms not defined herein shall have the meaning given them in the Act and in subpart A of this part.