Metals and Melting Practices - Charging,Coke,Flux,Hearth

Charging : An operation in which raw materials are added up to a furnace.
Coke : An impure form of carbon that is made up by baking coal in sealed ovens. Utilized as a reducing agent in blast furnaces.
Flux : A chemical substance, typically a base that combines with impurities to make a molten slag.
Hearth : A heat-resistant basin at the bottom of a furnace, in which molten metal gathers.