DEVICE FOR SETTING TARGET MOLTEN STEEL TEMPERATURE AT CONVERTER BLOWING COMPLETION, METHOD FOR SETTING TARGET MOLTEN STEEL TEMPERATURE AT CONVERTER BLOWING COMPLETION, CONVERTER BLOWING METHOD AND CONVERTER OPERATION METHOD

• Main Author: TAKAGI HIROMASA
• Format: Patent
• Language: English; Japanese
• Published: 11.01.2018
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; METALLURGY; METALLURGY OF IRON; PERFORMING OPERATIONS; POWDER METALLURGY; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TRANSPORTING; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

PROBLEM TO BE SOLVED: To provide a technology capable of setting a target molten steel temperature at converter blowing completion at high accuracy.SOLUTION: There is provided a device for setting target molten steel temperature at converter blowing completion having a part 11 of setting molten steel temperature at casting initiation for setting a molten temperature at casting initiation, a tundish temperature distribution state calculation part 10 for estimating temperature distribution state in a thickness direction of a refractory layer of tundish 5, a part 13 of estimating a molten steel temperature in tundish for estimating molten steel temperature using the temperature distribution state or the like, a part 9 for setting molten steel temperature needed at casting initiation for setting molten steel temperature at arrive time of continuous casting facility when molten steel temperature difference between the molten steel temperature in the tundish and needed molten steel temperature in the tundish is in molten steel temperature difference allowable range, and a part 8 for setting target molten steel temperature at converter blowing completion for setting target molten steel temperature at converter blowing completion based on the molten steel temperature needed at casting initiation.SELECTED DRAWING: Figure 2 【課題】高精度に転炉吹錬終了時目標溶鋼温度を設定することが可能な技術を提供する。【解決手段】鋳造開始時溶鋼温度を設定する鋳造開始時溶鋼温度設定部１１と、タンディッシュ５の耐火物層の厚さ方向への温度分布状態を推定するタンディッシュ温度分布状態算出部１０と、上記温度分布状態等を用いて溶鋼温度を推定するタンディッシュ内溶鋼温度推定部１３と、タンディッシュ内の溶鋼温度と連続鋳造機におけるタンディッシュ内必要溶鋼温度との溶鋼温度差が溶鋼温度差許容範囲内であるときに連続鋳造設備到着時の溶鋼温度を鋳造開始時必要溶鋼温度に設定する鋳造開始時必要溶鋼温度設定部９と、鋳造開始時必要溶鋼温度に基づいて転炉吹錬終了時目標溶鋼温度を設定する転炉吹錬終了時目標溶鋼温度設定部８と、を備える転炉吹錬終了時目標溶鋼温度設定装置。【選択図】図２