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slag
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Slag
In chemistry, the molten mass of impurities that is produced in the smelting or refining of metals.
The slag produced in the manufacture of iron in a blast furnace floats on the surface above the molten iron. It contains mostly silicates, phosphates, and sulphates of calcium. When cooled, the solid is broken up and used as a core material in the foundations of roads and buildings.
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Blue is taken from the Swedish arms. Red and white recall the Danish flag, known as the Dannebrog. Effective date: 15 December 1899.
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