Abstract
Rail steel production at OAO NTMK has a number of distinguishing features. The intermediate metal is smelted in the converter in two stages: first, the production of the intermediate metal and vanadium slag; second, the correction of the intermediate metal’s chemical composition to meet grade requirements. Then the metal is sent for ladle treatment, including reduction and alloying of the melt after discharge in a ladle‐furnace unit under slag, with argon injection; and vacuum degassing of the metal in the ladle under slag (in an RH circulation unit), prior to continuous casting.
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