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topic 9359

Aluminum deoxidizer


What is aluminum deoxider? How does it work in the steelmaking process?

Don J. Shim
- Seattle, Washington, USA


Hello Don!

Oxygen gas, dissolved in the molten steel, is one of the elements you want to remove from the steel while it is still molten. Aluminum does this well by combining with the oxygen to become aluminum oxide, which floats to the top of the vessel of hot metal and is skimmed off as slag.

A good reference on this is "The Making, Shaping, and Treating of Steel" which was published by US Steel and now by the AISE. Look at for a description, and in your local library for a copy.

Hope this helps!

lee gearhart
Lee Gearhart

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