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Viscosity Prediction Model for Blast Furnace Slag with High Al2O3

Zheng, Haiyan ; Ding, Yaqiang ; Zhou, Shifa ; Wen, Qiulin ; Jiang, Xin ; Gao, Qiangjian ; Shen, Fengman

Steel research international, 2021-01, Vol.92 (1), p.n/a [Periódico revisado por pares]

Weinheim: Wiley Subscription Services, Inc

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  • Título:
    Viscosity Prediction Model for Blast Furnace Slag with High Al2O3
  • Autor: Zheng, Haiyan ; Ding, Yaqiang ; Zhou, Shifa ; Wen, Qiulin ; Jiang, Xin ; Gao, Qiangjian ; Shen, Fengman
  • Assuntos: Aluminum oxide ; blast furnace slag with high Al2O3 ; Blast furnace slags ; Calcium oxide ; Computational fluid dynamics ; isoviscosity contours ; Magnesium oxide ; Prediction models ; ratio of w(MgO)/w(Al2O3) ; Silicon dioxide ; Viscosity ; viscosity prediction models
  • É parte de: Steel research international, 2021-01, Vol.92 (1), p.n/a
  • Descrição: Based on the theory of fluid dynamics, an improved Urbain model (IUM) for predicting viscosity of blast furnace (BF) slag with high Al2O3 slag is proposed by introducing two model parameters, R4 (the ratio of (X(CaO) + X(MgO))/(2X(SiO2)  + 3X(Al2O3))) and N (the ratio of X(MgO)/(3X(Al2O3))). Experimental results indicate that the IUM is highly precise and more suitable for BF slag. Isoviscosity contours for CaO–SiO2–15%Al2O3–MgO melts at 1500oC are plotted using the data obtained from the IUM, which show that the slag viscosity centers at the line of Rw2 (the ratio of w(CaO)/w(SiO2)) = 0.92–1.36 (w(SiO2) = 35.66%–38.55%) and Nw (the ratio of w(MgO)/w(Al2O3)) = 0.05–0.76, the viscosity at the center line is 0.3 Pa s, and the viscosity increases in the process of diffusion from the center line to the periphery. Slag viscosity increases generally with increase in the value of Nw(N), decreases slightly with increase in the value of Rw2(R4) when Nw is lower than 0.55, whereas increases with increase in the value of Rw2(R4) when Nw is greater than or equal to 0.55, indicating that the stability of the slag caused by the change in composition becomes poor when Nw is high. Herein, an improved Urbain model (IUM) for predicting the viscosity of blast furnace (BF) slag is established by introducing R4 (the ratio of (X(CaO) + X(MgO))/(2X(SiO2)  + 3X(Al2O3))) and N (the ratio of X(MgO)/(3X(Al2O3))), which are significant parameters for BF smelting, and isoviscosity contours for CaO–SiO2–15%Al2O3–MgO melts at 1500 °C are plotted based on the data obtained from IUM.
  • Editor: Weinheim: Wiley Subscription Services, Inc
  • Idioma: Inglês
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