slag heap

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English

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Noun

slag heap (plural slag heaps)

  1. A man-made mound or heap formed with the waste material (slag) as a by-product of coal mining. Can also refer to the waste by-product from a foundry or furnace, formed into such a mound.
    Synonym: (by-product of mining) spoil heap
    • 1952 January, H. A. Vallance, “The Waverley Route”, in Railway Magazine, page 16:
      As the Lothian Plain is reached, collieries and slag heaps begin to appear, although much of the surrounding country remains unspoiled.
    • 1960 February, J. N. Faulkner, “The Belgian Railways today”, in Trains Illustrated, page 86:
      The Borinage coalfield around Mons is another attractive area for the railway enthusiast; it is rather like South Lancashire, with its gently undulating landscape studded with slag heaps and pithead gear and criss-crossed by railway lines and tramways.

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