Continuous casting start timing determination method, continuous casting facility operation method, slab manufacturing method, determining device, continuous casting start determination system, and display terminal device

A continuous casting start determination system for determining a continuous casting start timing as a timing of drawing a dummy bar in a continuous casting facility, the continuous casting start determination system comprising:

• a determination server device;
• and
• a display terminal device, wherein:
• the determination server device includes
• a plurality of temperature sensors provided in a casting-mold width direction in each of a plurality of casting-direction positions including a casting-direction determination position as a predetermined casting-direction position on a copper plate of a casting mold of the continuous casting facility, the plurality of temperature sensors being configured to measure temperatures in the copper plate,
• a drawing start determination section configured to determine the start timing based on a casting-direction position of a molten metal surface of molten steel, the casting-direction position being estimated based on measurement results from the plurality of temperature sensors and a width of a slab to be cast in the continuous casting facility, and
• a molten metal surface level information output unit configured to output molten metal surface level information indicative of a molten metal surface level state including the casting-direction position of the molten metal surface of the molten steel which casting-direction position is estimated by the drawing start determination section;
• and
• the display terminal device includes
• a display data acquisition unit configured to acquire the molten metal surface level information, and
• a displaying unit configured to display, based on the acquired molten metal surface level information, a molten metal surface state of each position which molten metal surface state corresponds to temperature data in each casting-direction position, and reference data to estimate the molten metal surface state.

A display terminal device constituting a continuous casting start determination system together with a determination server device for determining a continuous casting start timing as a timing of drawing a dummy bar in a continuous casting facility, the display terminal device comprising:

• a display data acquisition unit configured to acquire molten metal surface level information indicative of a molten metal surface level state including a casting-direction position of a molten metal surface of molten steel which casting-direction position is estimated by the determination server device;
• and
• a displaying unit configured to display, based on the acquired molten metal surface level information, a molten metal surface state of each position which molten metal surface state corresponds to temperature data in each casting-direction position, and reference data to estimate the molten metal surface state, wherein
• the determination server device estimates the casting-direction position of the molten metal surface of the molten steel based on a width of a slab to be cast in the continuous casting facility and measurement results from a plurality of temperature sensors provided in a casting-mold width direction in each of a plurality of casting-direction positions including a casting-direction determination position as a predetermined casting-direction position on a copper plate of a casting mold in the continuous casting facility, the plurality of temperature sensors being configured to measure temperatures in the copper plate.