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Water slag of blast furnace
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The by-product of blast furnace:water slag

The general composition of blast furnace slag:

     SiO2:30-40%

     Al2O3:5-15%

     CaO:35-45%

     MgO:5-15%

     Na2O+K2O:0-1%

     S:1-2%

The slag is to control the compostion of pig iron by the reduction process of all the elements, the composition of slag is chosen to remove SiO2 and Al2O3 in a fluid slag; to absorb K2O and Na2O which otherwise tend to build up in the furnace;to control the silicon content of the metal. The blast furnace slag is used in the manufacture of commercial concrete and aggregate.





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