Control device for vacuum degassing equipment, control method for vacuum degassing equipment, operation method, and manufacturing method for molten steel

• Main Authors: TOMIYAMA, SHINJI, OHIGASHI, YUTA, SHIMAMOTO, HIROYUKI
• Format: Patent
• Language: Chinese; English
• Published: 16.02.2024
• Subjects: CHEMISTRY; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

Provided is a control device, etc., for vacuum degassing equipment in which the carbon concentration in molten steel is estimated with high precision and a decarburization treatment is to be ended at an appropriate timing. The control device (10) for vacuum degassing equipment comprises: an operational information input unit (11) into which are input information about the weight of the molten steel and the component concentration therein prior to the decarburization treatment, and information about operational result values and auxiliary raw materials during execution of the decarburization treatment; a component calculation unit (12) which estimates the carbon concentration in the molten steel; a correction calculation unit (13) which computes correction parameters for correcting the estimated carbon concentration in the molten steel and the estimated value of the amount of carbon emitted from the vacuum degassing equipment; and a decarburization treatment control unit (14) which ends the decarburization tre