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A platform for research: civil engineering, architecture and urbanism
METHOD FOR MANUFACTURING SLAG MATERIAL, AND SLAG MATERIAL
To provide a method for manufacturing a slag material in which powdering by hydration expansion is suppressed without adding new facility or process and without increasing a slag amount, and a slag material.SOLUTION: A method for manufacturing a slag material in which steel-making slag in a molten state is cooled down such that a cooling rate in the temperature range from a molten state to 1200°C is 1000°C/h to 400°C/h, a cooling rate in the temperature range from 1000°C to 600°C becomes 300°C/h or less, and the steel-making slag is cooled down such that holding time T1 in the temperature range from 1200°C to 1000°C satisfies the following formula (1). T1≤-7.5×[f-CaO]+69.5 ...(1) In the formula (1) above, T1 denotes holding time (h), [f-CaO] denotes the content (mass%) of f-CaO in the steel-making slag.SELECTED DRAWING: Figure 1
【課題】新たな設備や工程を追加することなく、且つ、スラグ量を増加させることなく水和膨張による粉化が抑制されたスラグ材の製造方法およびスラグ材を提供する。【解決手段】スラグ材の製造方法であって、溶融状態の製鋼スラグを、溶融状態から１２００℃までの温度域における冷却速度が１０００℃／ｈ～４００℃／ｈであり、１０００℃から６００℃までの温度域における冷却速度が３００℃／ｈ以下となるように前記製鋼スラグを冷却し、１２００℃から１０００℃までの温度域における保持時間Ｔ１が下記（１）式を満たすように前記製鋼スラグを冷却する。Ｔ１≦－７．５×［ｆ－ＣａＯ］＋６９．５・・・（１）上記（１）式において、Ｔ１は保持時間（ｈ）であり、［ｆ－ＣａＯ］は、前記製鋼スラグにおけるｆ－ＣａＯの含有量（質量％）である。【選択図】図１
METHOD FOR MANUFACTURING SLAG MATERIAL, AND SLAG MATERIAL
To provide a method for manufacturing a slag material in which powdering by hydration expansion is suppressed without adding new facility or process and without increasing a slag amount, and a slag material.SOLUTION: A method for manufacturing a slag material in which steel-making slag in a molten state is cooled down such that a cooling rate in the temperature range from a molten state to 1200°C is 1000°C/h to 400°C/h, a cooling rate in the temperature range from 1000°C to 600°C becomes 300°C/h or less, and the steel-making slag is cooled down such that holding time T1 in the temperature range from 1200°C to 1000°C satisfies the following formula (1). T1≤-7.5×[f-CaO]+69.5 ...(1) In the formula (1) above, T1 denotes holding time (h), [f-CaO] denotes the content (mass%) of f-CaO in the steel-making slag.SELECTED DRAWING: Figure 1
【課題】新たな設備や工程を追加することなく、且つ、スラグ量を増加させることなく水和膨張による粉化が抑制されたスラグ材の製造方法およびスラグ材を提供する。【解決手段】スラグ材の製造方法であって、溶融状態の製鋼スラグを、溶融状態から１２００℃までの温度域における冷却速度が１０００℃／ｈ～４００℃／ｈであり、１０００℃から６００℃までの温度域における冷却速度が３００℃／ｈ以下となるように前記製鋼スラグを冷却し、１２００℃から１０００℃までの温度域における保持時間Ｔ１が下記（１）式を満たすように前記製鋼スラグを冷却する。Ｔ１≦－７．５×［ｆ－ＣａＯ］＋６９．５・・・（１）上記（１）式において、Ｔ１は保持時間（ｈ）であり、［ｆ－ＣａＯ］は、前記製鋼スラグにおけるｆ－ＣａＯの含有量（質量％）である。【選択図】図１
METHOD FOR MANUFACTURING SLAG MATERIAL, AND SLAG MATERIAL
スラグ材の製造方法およびスラグ材
YANO YASUTAKE (author) / KATO YUSUKE (author) / TAKAHASHI KATSUNORI (author)
2022-10-13
Patent
Electronic Resource
Japanese
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