2019 Pittsburgh AISTech

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Operating Experiences of Post-Combustion Lances at Liberty OneSteel - Whyalla Steel Works (Room 409)

Post-combustion distributor (PCD) lances, while not universally adopted, have been used in BOF steelmaking for many decades. A portion of the main oxygen reacts with carbon from the process and combusts to generate heat, thus preventing cone, mouth and lance skull buildup. Liberty OneSteel Whyalla, as with many plants, experienced delays related to cleaning of the cone, tap pad and lance. In 2017, PCD lances were introduced to their 130-ton convertor. Operating experiences in a unique environment with secondary oxygen will be reported, as well as process measurements relevant to the application of PCD lances.