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Calcium Aluminate/Refining Slag

Pre-melting calcium aluminate

Sintering calcium aluminate

Composite calcium aluminate

Necessary additive for iron and steel

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The main components of calcium aluminate refining slag are 3CaO·Al₂O₃, Al2O3, SiO2, CaFe2, MgO, etc. These metal ions are combined into CaO-CaF2 base, CaO-Al2O3 base, CaO-Al2O3-SiObase, and then the composite material, refining slag is formed. Refining slag is a necessary additive for deoxidation and desulfurization in the refining process of iron and steel enterprises.

There are three types of calcium aluminate refining slag: pre-melted calcium aluminate refining slag, sintered calcium aluminate refining slag and composite calcium aluminate refining slag. They have the functions of rapid slag formation, arc submerging, slag making, absorption of molten steel inclusion and desulfurization. They are of strong deoxidation and desulfurization effect which can reduce gas and impurities in steel.


  1. Reasonable chemical composition is conducive to slag formation and shorten smelting time.
  2. Due to the rapid slag formation, the power consumption of refining time can be reduced.
  3. Reduce the consumption of ladle refractory and improve the ladle age.
  4. It has good desulfurization and deoxidation effect.
  5. Due to its low melting point, it has a good effect of adsorbing impurities in the process of argon blowing in ladle and steel and outlet of electric furnace.
  6. The ingredients are stable and uniform, and can be produced and packaged according to the technical data required by users.


TypeSiO2 (%)Al2O3 (%)CaO (%)MgO (%)CaF2 (%)Grain Size (mm)Water Content (%)

Using Method

It shall be added into the ladle before tapping, and the amount can be determined according to the current production process conditions. It is recommended to select 3-8g for one ton of steel (it can also be added twice, firstly adding half at the bottom of the ladle, and secondly adding with the steel flow). After argon blowing and stirring at the bottom of the ladle, the gas and impurities in the steel will float fully, the temperature and chemical composition of the molten steel will be uniform, the purity of molten steel will be improved, and the quality of steel will be significantly improved.


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