Scoria (Noun)
Meaning
The scum formed by oxidation at the surface of molten metals.
Classification
Nouns denoting substances.
Examples
- The scoria that formed on the surface of the molten iron was carefully skimmed off by the foundry worker.
- The furnace operator had to stir the molten copper to prevent scoria from forming a thick crust.
- The impurities in the metal rose to the surface and formed a layer of scoria that was removed before casting.
- When the aluminum smelter was tapped, a thick layer of scoria was exposed and had to be skimmed off before pouring.
- The presence of scoria on the surface of the molten steel indicated that the refining process was not yet complete.