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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 19b
SUMMARY:Automatic control system with off-gas analysis in AOD
DESCRIPTION:Recently, many steel companies has been developing technologies for the realization of SMART steel making process. POSCO is also highly interested in automation process using smart technology in each process field to realize the smart factory. Papers and patents on automation process easily searchable across countries, and commercial technology products are on sale. Most of the automatic refining technologies aim at the dynamic control linked to the real-time decarburization characteristics while the static control by statistics proceeds. In this paper, the refining automation system in the AOD process that is being carried out at POSCO is introduced. In general, control of Oxygen-Nitrogen(or Argon) blowing step, basic weight and input of raw materials and temperature measuring and sampling of sub-lance are all performed manually by operators in AOD. Although this works are carried out under the standard, there is an operating deviation due to human factors. Therefore, an automatic refining technique was developed to reduce these human deviation factors in this study. In this automatic refining system, the decarburization state in the vessel is tracked in real time using the off-gas analyzer, and the end point of the each decarburization step is determined according to the criteria set and the blowing step is switched automatically. The raw materials to be added in the AOD process in order to match the ingredients for the steel  are set in advance before the operation. When the automation of blowing starts, the raw materials are automatically weighed and put into the vessel according to each blowing step. Sampling for temperature and component confirmation of molten steel is also automatically performed at the designated time. Through this automatic control technology, it is confirmed that the operation deviation and amount of oxygen consumption was reduced.
CLASS:PUBLIC
DTSTART:20230615T094000
DTEND:20230615T100000
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