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AssigneeJfe Steel Corporation
InventorsYuki Kawashiri, Tetsuya Yamamoto, Kazuhira Ichikawa, Taihei Nouchi
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A molten material liquid level detection method that can detect a liquid level of molten material from a residual amount of the molten material with high accuracy and a method for operating a vertical furnace by using the detection method. The molten material liquid level detection method detects a liquid level of molten material remaining in a bottom portion of a vertical furnace after end of discharge of a molten material. The molten material liquid level detection method includes calculating a void fraction of the solid-filled structure, and detecting a liquid level of the molten material after the end of the discharge by using the calculated void fraction and a residual amount of the molten material after the end of the discharge.
A molten material liquid level detection method for detecting a liquid level 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 molten material liquid level detection method comprising:
A molten material liquid level detection apparatus for detecting a liquid level 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 molten material liquid level detection apparatus comprising a liquid level detection unit that calculates a void fraction of the solid-filled structure and detects the liquid level of the molten material after the end of the discharge based on the calculated void fraction and a residual amount of the molten material after the end of the discharge,
A molten material liquid level detection apparatus for detecting a liquid level 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 molten material liquid level detection apparatus comprising a processor configured to execute the steps of:
Dependencies are inferred from the claim text.