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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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Slag Composition--Maintaining low levels of ferrous oxide (FeO) and MnO in a slag is important to produce minimum S levels in the iron by creating neutral or basic slags.
The result is a more basic slag, which promotes faster wear of the silica refractory lining.
The components of a basic slag can be classified as refractory oxides (CaO and MgO) and fluxing oxides ([SiO.
 
 
 
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