Slag

Slags are the by-product of smelting ore to purify metals. They can be considered to be a mixture of metal oxides however can contain metal sulphides and metal atoms in the elemental form. Slags are generally used as a waste removal mechanism in metal smelting however they can also serve other purposes such as assisting in smelt temperature control and to minimise re-oxidation of the final bullion product before casting.

See also

• Dross