slag heap

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Alternative forms[edit]


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.
    • 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.