Residence Time Distribution Analysis by the Modified Combined Model for the Design of Continuous Refining Vessel.

• Zong Jin-Ho

  Strip Casting Project Team, RIST, Pohang, Korea

• Yi Kyung-Woo

  School of Materials Science and Engineering, Seoul National University

• Yoon Jong-Kyu

  School of Materials Science and Engineering, Seoul National University

Abstract

Flow analyses with RTD experiments have been made for the fundamental design of continuous refining vessels of metallurgical gas injection systems. The modified combined model is suggested for the analysis of various kinds of RTD shapes and it is very effective for the treatment of tail-data. The plug flow fraction t_p, which is statistically obtained by the present model as a characteristic parameter of the RTD curve, is very much reliable regardless of the cut-off position of data. The effects of various design parameters such as the gas blowing position, the gas flow rate, the divided blowing with multiple lances, the supplementary bottom blowing, and the installation of dams are examined by means of this model for obtaining design concepts of the vessel. The plug flow fraction t_p could be increased by the cell effect of the divided blowing, the minimization of dead zone by the supplementary bottom blowing, and the proper placement of dams.

Journal

• ISIJ International

  ISIJ International 39 (2), 139-148, 1999

  The Iron and Steel Institute of Japan

Keywords

• continuous refining
• RTD
• flow analysis
• plug flow ratio
• water model

Details

• CRID: 1390282681428874624
• NII Article ID: 10002462273
• NII Book ID: AA10680712
• DOI: 10.2355/isijinternational.39.139
• COI: 1:CAS:528:DyaK1MXitFKgtLk%3D
• ISSN: 13475460
• ISSN: 09151559
• ISSN: http://id.crossref.org/issn/09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/39/2/39_2_139/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed