Slag
Slag (slag) , noun
[Swedish slagg, or LG. slacke, whence German schlacke; originally, perhaps, the splinters struck off from the metal by hammering. See Slay, transitive verb]
1.
The dross, or recrement, of a metal; also, vitrified cinders.
2.
The scoria of a volcano.
3.
(Metallurgy) A product of smelting, containing, mostly as silicates, the substances not sought to be produced as matte or metal, and having a lower specific gravity than the latter; -- called also, esp. in iron smelting, cinder. The slag of iron blast furnaces is essentially silicate of calcium, magnesium, and aluminium; that of lead and copper smelting furnaces contains iron.
Collocations (2)
Slag furnace or Slag hearth (Metallurgy) , a furnace, or hearth, for extracting lead from slags or poor ore.
Slag wool , mineral wool. See under Mineral.
Slag , verb, intransitive and transitive
(Metallurgy) To form, or form into, a slag; to agglomerate when heated below the fusion point.