The Prediction of Gas Residence Times in Foaming CaO-SiO2-FeO Slags.

• Ghag Surinder S.

  RGC Mineral Sands

• Hayes Peter C.

  Department of Mining, Minerals and Materials Engineering, The University of Queensland

• Lee Hae-Geon

  Department of Materials Science and Metallurgical Engineering, Pohang University of Science and Technology

Abstract

A dynamic, non-equilibrium model of foaming:<br><br>Σ=1×106((pg)2d3 μ·Eeff)<br><br>which relates the residence times of gas bubbles in foams (Σ) to the viscosity of the liquid phase (μ); the effective elasticity (Eeff) resulting from the dynamic adsorption of surface active species; the liquid phase density (ρ); and the mean bubble diameter (d ); has been applied to foaming in the CaO–SiO2–FeO system at 1823 K.<br> In agreement with industrial observations, the model shows a transition from a foaming regime to a non-foaming regime as the slag basicity increase above 1.5. This is due to poor surface elasticity resulting from the negligible adsorption of silica in this region.

Journal

• ISIJ International

  ISIJ International 38 (11), 1216-1224, 1998

  The Iron and Steel Institute of Japan

Keywords

• slag
• foaming
• physical modelling

Details

• CRID: 1390001206454202368
• NII Article ID: 10002461347
• NII Book ID: AA10680712
• DOI: 10.2355/isijinternational.38.1216
• COI: 1:CAS:528:DyaK1MXntlOj
• ISSN: 13475460
• ISSN: 09151559
• ISSN: http://id.crossref.org/issn/09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/38/11/38_11_1216/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed