Slag is a byproduct generated during the process of smelting, which is the extraction of metal from its ore. It consists primarily of the inorganic impurities that are removed from the metal during processing. When ores are heated to high temperatures, the metal melts and separates from the unwanted materials, which then combine to form slag. Slag typically consists of a mixture of various compounds, including oxides of silicon, aluminum, calcium, magnesium, and iron.
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