Sullage
Dirt and scoria that accumulate on the surface of molten metal during the process of filling moulds. In this case it consists of the melted particles of sand, etc., gathered from the mould itself as well as that which passes therein from ladle and runner surfaces, which latter will always be in proportion to the amount of care exercised to prevent it by suitable skimming arrangements. Cupola and ladle slag is frequently termed sullage. See SLAG; SCORIA; SKIMMING-GATE; SKIMMER.