In 1974, the technologically obsolete Thomas process was replaced at Maxhütte by steel production in the bottom-blowing oxygen converter (increasing output and improving steel quality.   PLG_GSPEECH_SPEECH_BLOCK_TITLE converter (outdoor)In 1974, the technologically obsolete Thomas process was replaced at Maxhütte by steel production in the bottom-blowing oxygen converter (increasing output and improving steel quality.