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slag





industrial slag
Waste formed as an upper, molten layer in the smelting of ores and refining of metals, notably iron and steel. It consists of impurities, oxides, and ash, with a limestone flux, and serves to remove unwanted substances and to protect the metal from oxidation. Solidified slag is used as aggregate, for road making, and as a phosphate fertilizer.


Related entries

   • blast furnace
   • open-hearth process


Related category

   • INDUSTRIAL CHEMISTRY