Residual liquid amount detection method and detection apparatus for the same, residual molten material amount detection method and detection apparatus for the same, and method for operating vertical furnace

A residual liquid amount detection apparatus for detecting a residual amount of a liquid remaining in a bottom portion of a container after the liquid is discharged through a discharge hole provided in a lower portion of the container, the container being filled with a solid so that a solid-filled structure is formed and the liquid being contained in the container so as to infiltrate voids in at least a part of the solid-filled structure, the residual liquid amount detection apparatus comprising:

• a supply speed acquisition unit that acquires a supply speed of the liquid;
• a discharge speed acquisition unit that acquires a discharge speed of the liquid from a discharge acceleration, a discharge period, and an initial discharge speed of the discharge of the liquid through the discharge hole;
• and
• a residual amount calculation unit that calculates the residual amount of the liquid based on a difference between the supply speed of the liquid and the discharge speed of the liquid.

A residual molten material amount detection apparatus for detecting a residual amount of molten material remaining in a bottom portion of a vertical furnace after an end of discharge of the molten material, the vertical furnace generating high-temperature reducing gas by burning carbon by using oxygen-containing gas blown through a lower portion of the vertical furnace, producing the molten material by causing the high-temperature reducing gas to melt and reduce an iron source raw material that is charged through a furnace top of the vertical furnace and forms a solid-filled structure in the vertical furnace, and discharging the molten material through a taphole of the vertical furnace, the residual molten material amount detection apparatus comprising:

• a production speed acquisition unit that acquires a production speed of the molten material;
• a discharge speed acquisition unit that acquires a discharge speed of the molten material from a discharge acceleration, a discharge period, and an initial discharge speed of the discharge of the molten material through the taphole;
• and
• a residual amount calculation unit that calculates the residual amount of the molten material based on a difference between the production speed of the molten material and the discharge speed of the molten material.

A residual liquid amount detection apparatus for detecting a residual amount of a liquid remaining in a bottom portion of a container after the liquid is discharged through a discharge hole provided in a lower portion of the container, the container being filled with a solid so that a solid-filled structure is formed and the liquid being contained in the container so as to infiltrate voids in at least a part of the solid-filled structure, the residual liquid amount detection apparatus comprising a processor configured to execute the steps of:

• acquiring a supply speed of the liquid;
• acquiring a discharge speed of the liquid from a discharge acceleration, a discharge period, and an initial discharge speed of the discharge of the liquid through the discharge hole;
• and
• calculating the residual amount of the liquid based on a difference between the supply speed of the liquid and the discharge speed of the liquid.

A residual molten material amount detection apparatus for detecting a residual amount of molten material remaining in a bottom portion of a vertical furnace after an end of discharge of the molten material, the vertical furnace generating high-temperature reducing gas by burning carbon by using oxygen-containing gas blown through a lower portion of the vertical furnace, producing the molten material by causing the high-temperature reducing gas to melt and reduce an iron source raw material that is charged through a furnace top of the vertical furnace and forms a solid-filled structure in the vertical furnace, and discharging the molten material through a taphole of the vertical furnace, the residual molten material amount detection apparatus comprising a processor configured to execute the steps of:

• acquiring a production speed of the molten material;
• acquiring a discharge speed of the molten material from a discharge acceleration, a discharge period, and an initial discharge speed of the discharge of the molten material through the taphole;
• and
• calculating the residual amount of the molten material based on a difference between the production speed of the molten material and the discharge speed of the molten material.