Argon oxygen decarburization: Difference between revisions

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Revision as of 16:46, 1 November 2010

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{{Unreferenced|date=March 2008}}

'''Argon oxygen decarburization''' ('''AOD''') is a process primarily used in [[stainless steel]] [[steel making|making]] and other high grade alloys with oxidizable elements such as [[chromium]] and [[aluminum]]. After initial melting the metal is then transferred to an AOD vessel where it will be subjected to three steps of refining; [[decarburization]], [[Reduction (chemistry)|reduction]], and [[desulphurization]]. AOD was invented in 1954 by the Lindé Division of The Union Carbide Corporation <ref>http://www.springerlink.com/content/c6g66r71262g0158/</ref> (which became known as [[Praxair]] in 1992) <ref>http://www.unioncarbide.com/history/index.htm</ref>.

== Decarburization ==

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So, additions of lime are added to dilute sulfur in the metal bath. Also, aluminum or silicon may be added to remove oxygen. Other trimming alloy additions might be added at the end of the step. After sulfur levels have been achieved the slag is removed from the AOD vessel and the metal bath is ready for tapping. The tapped bath is then either sent to a stir station for further chemistry trimming or to a caster for casting.

== References ==

{{reflist}}

[[Category:Steelmaking]]