Adventures in the Anthropocene

One ton of iron produces one ton of slag

Towards the end of the 19th Century the furnaces of Cleveland were producing 2.5 million tons of pig iron a year.slag-s

scoriaˈskɔːrɪə
noun
noun: scoria; plural noun: scoriae
  1. basaltic lava ejected as fragments from a volcano, typically with a frothy texture.
    “chunks of black scoria”
  2. slag separated from molten metal during smelting.
    Origin -Late Middle English (denoting slag from molten metal): via Latin from Greek skōria ‘refuse’, from skōr‘dung’. The geological term dates from the late 18th century.