METHOD FOR DETECTING END POINT OF DECARBURIZATION, DEVICE FOR DETERMINING END POINT OF DECARBURIZATION, METHOD FOR PERFORMING SECONDARY REFINING OPERATION FOR STEEL PRODUCTION AND METHOD FOR PRODUCING MOLTEN STEEL Russian patent published in 2023 - IPC C21C7/00 C21C7/10 

FIELD: metallurgy.

SUBSTANCE: proposed is a method comprising the step of estimating the concentrations of carbon, oxygen in molten steel and gaseous carbon dioxide in the exhaust gas in a vacuum chamber during vacuum decarburization using the measured values of the mentioned concentrations before the start of vacuum decarburization, and the step of determining at which the parameter included in the mathematical formula of the model is corrected at the time moment when the measured value of at least one of the mentioned concentrations is obtained during the vacuum decarburization period, while, to determine the corrected parameter, the concentration of carbon in the molten steel is estimated using the mathematical formula of the model in which the specified parameter is corrected, and it is determined that the vacuum decarburization is completed.

EFFECT: ability to accurately determine the end point of the vacuum decarburization process.

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