Effect of Additives on Viscosity of LATS Refining Ladle Slag

• 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

Abstract

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–CaF₂ (CaO/CaF₂ mass ratio is 1 : 1), CaO–B₂O₃ (CaO/B₂O₃ mass ratio is 1 : 1) and Li₂O 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–CaF₂ or 10 mass% CaO–B₂O₃ or 4 mass% Li₂O, the slag viscosity at 1 500°C could be decreased lower than 2 Pa·s.

Journal

• ISIJ International

  ISIJ International 46 (5), 637-640, 2006

  The Iron and Steel Institute of Japan

Keywords

• LATS refining
• immersion cover
• ladle slag
• viscosity
• additives

Details

• CRID: 1390001206489369472
• NII Article ID: 10018046381
• NII Book ID: AA10680712
• DOI: 10.2355/isijinternational.46.637
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational/46/5/46_5_637/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed