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Slag facts for kids

Kids Encyclopedia Facts
Caletones
Molten slag is carried outside and poured to a dump

Slag is a liquid residue from making iron. It consists of calcium silicate. The silicon dioxide in iron has to be taken away. The calcium oxide reacts with the silicon dioxide solid to make liquid calcium silicate, which is lighter than iron. It is drained out of the blast furnace. Slag can be used to make concrete. Air can be blown through molten slag to make a fluffy insulation made mineral wool.

Concrete made with blast furnace slag is almost pure white compared to ordinary concrete which is greyish.

Related pages

Images for kids

  • IronAndSteelProduction

    Global production of iron and steel, 1942- 2018, according to USGS.

  • Indiana-Harbor-scrap

    Pile of steelmaking slag at the ArcelorMittal Indiana Harbor steelmaking facility.

  • The Manufacture of Iron -- Carting Away the Scoriae

    The Manufacture of Iron – Carting Away the Scoriæ (slag), an 1873 wood engraving

  • Slag runoff Republic Steel

    Slag run-off from one of the open hearth furnaces of a steel mill, Republic Steel, Youngstown, Ohio, November 1941. Slag is drawn off the furnace just before the molten steel is poured into ladles for ingotting.

See also

Kids robot.svg In Spanish: Escoria (metalurgia) para niños

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Slag Facts for Kids. Kiddle Encyclopedia.