Since the introduction of RH (Ruhrstahl Heraeus) degassing technology in the late 50’s, the RH-degassing process became an important operation in modern steel plants. Over the years the RH-process was continuously developed to satisfy the steel producers demand. In the early days of RH-degassing the target was to achieve a low hydrogen level in the liquid steel.
Nowadays the RH-degasser is mainly used for the production of low and ultra-low carbon steel grades as well as hydrogen removal. Due to constantly developing and improving technology, heating of the chamber, chemical heating using oxygen under vacuum conditions, forced decarburization and removal of the skull in the chamber can be carried out simultaneously with oxygen top-lance blowing.
The RH-degassing process has proven its eminent suitability for operations requiring short tap-to-tap times with heat sizes of up to 400t.
The particular features of the RH recirculation degassing process include:
which has led to the following results:
USP‘s of INTECO Design: