Effect of Additives on Viscosity of LATS Refining Ladle Slag

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著者

    • WANG Hongming
    • Department of Materials Science and Engineering, Jiangsu University
    • LI Guirong
    • Department of Materials Science and Engineering, Jiangsu University
    • DAI Qixun
    • Department of Materials Science and Engineering, Jiangsu University
    • LEI Yucheng
    • Department of Materials Science and Engineering, Jiangsu University
    • ZHAO Yutao
    • Department of Materials Science and Engineering, Jiangsu University
    • LI Bo
    • Baosteel Group Shanghai No. 1 Iron & Steel Corp.
    • SHI Guomin
    • Baosteel Group Shanghai No. 1 Iron & Steel Corp.
    • REN Zhongming
    • Department of Materials Science and Engineering, Shanghai University

抄録

To reduce or eliminate slag sticking onto the ladle immersion cover during the refining process of Ladle Alloying Treatment Station (LATS), the variation of the ladle slag viscosity before and after LATS refining process was investigated. The additives including CaO–CaF<sub>2</sub> (CaO/CaF<sub>2</sub> mass ratio is 1 : 1), CaO–B<sub>2</sub>O<sub>3</sub> (CaO/B<sub>2</sub>O<sub>3</sub> mass ratio is 1 : 1) and Li<sub>2</sub>O were employed to decrease the viscosity of LATS refining ladle slag. The mechanism of additives decreasing slag viscosity was analyzed. The rotary cylinder method was adopted in the viscosity measurements. The results showed that the viscosity of LATS refining ladle slag was very high and could be further increased after LATS refining process, which was one of main reasons for slag sticking onto immersion cover. All the three kinds of additives employed in this research could decrease the viscosity of LATS refining ladle slag remarkably. At 1 500°C, the viscosity of ladle slag without any additives is about 6.5 Pa·s. But by adding 10 mass% CaO–CaF<sub>2</sub> or 10 mass% CaO–B<sub>2</sub>O<sub>3</sub> or 4 mass% Li<sub>2</sub>O, the slag viscosity at 1 500°C could be decreased lower than 2 Pa·s.

収録刊行物

  • ISIJ international  

    ISIJ international 46(5), 637-640, 2006-05-15 

    The Iron and Steel Institute of Japan

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