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Interfacial assessment of CaO-Al2O3-SiO2-MgO slags on MgAl2O4 spinel

Conference Paper


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Abstract


  • Steel cleanness is an important and growing

    research area driven by the demands to produce high

    quality steel. Lowering the inclusion content in steel is an

    important criterion for clean steel. It is therefore

    important to better understand the interaction between

    inclusions and slag to improve the removability of

    inclusions from liquid steel. For efficient inclusion removal

    the inclusions must attach/bond with the slag phase. The

    strength of the attachment can be characterised by the

    wettability of the slag on the inclusions. In this study, the

    dynamic wetting of ladle slags of the CaO-Al2O3-SiO2-

    MgO system on a solid spinel (MgAl2O4) substrate was

    measured at 1500°C using a modified sessile drop

    technique. The dynamic contact angle between liquid slag

    and solid spinel was determined for different CaO/Al2O3

    mass percent ratios ranging from 1.02 to 1.52.

    Characteristic curves of wettability (θ) versus time showed

    a rapid decrease in wetting in the first 10s tending to a

    plateau value at extended times. The chemical interaction

    at the interface between spinel (MgAl2O4) and slag was

    analysed by scanning electron microscopy/energy

    dispersive spectroscopy (SEM/EDS). There is evidence of

    interaction between the slag and the spinel at the

    substrate-slag interface and what appears to be erosion at

    the interface of up to 10 μm into the substrate.

UOW Authors


  •   Abdeyazdan, Hamed (external author)
  •   Dogan, Neslihan (external author)
  •   Rhamdhani, Muhammad A. (external author)
  •   Chapman, Michael W. (external author)
  •   Monaghan, Brian

Publication Date


  • 2013

Citation


  • Abdeyazdan, H., Dogan, N., Rhamdhani, M. Akbar., Chapman, M. & Monaghan, B. J. (2013). Interfacial assessment of CaO-Al2O3-SiO2-MgO slags on MgAl2O4 spinel. Chemeca 2013: Challenging Tomorrow (pp. 154-160). Australia: Institution of Engineers Australia.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2699&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1690

Start Page


  • 154

End Page


  • 160

Place Of Publication


  • http://search.informit.com.au/documentSummary;dn=874336098868991;res=IELENG

Abstract


  • Steel cleanness is an important and growing

    research area driven by the demands to produce high

    quality steel. Lowering the inclusion content in steel is an

    important criterion for clean steel. It is therefore

    important to better understand the interaction between

    inclusions and slag to improve the removability of

    inclusions from liquid steel. For efficient inclusion removal

    the inclusions must attach/bond with the slag phase. The

    strength of the attachment can be characterised by the

    wettability of the slag on the inclusions. In this study, the

    dynamic wetting of ladle slags of the CaO-Al2O3-SiO2-

    MgO system on a solid spinel (MgAl2O4) substrate was

    measured at 1500°C using a modified sessile drop

    technique. The dynamic contact angle between liquid slag

    and solid spinel was determined for different CaO/Al2O3

    mass percent ratios ranging from 1.02 to 1.52.

    Characteristic curves of wettability (θ) versus time showed

    a rapid decrease in wetting in the first 10s tending to a

    plateau value at extended times. The chemical interaction

    at the interface between spinel (MgAl2O4) and slag was

    analysed by scanning electron microscopy/energy

    dispersive spectroscopy (SEM/EDS). There is evidence of

    interaction between the slag and the spinel at the

    substrate-slag interface and what appears to be erosion at

    the interface of up to 10 μm into the substrate.

UOW Authors


  •   Abdeyazdan, Hamed (external author)
  •   Dogan, Neslihan (external author)
  •   Rhamdhani, Muhammad A. (external author)
  •   Chapman, Michael W. (external author)
  •   Monaghan, Brian

Publication Date


  • 2013

Citation


  • Abdeyazdan, H., Dogan, N., Rhamdhani, M. Akbar., Chapman, M. & Monaghan, B. J. (2013). Interfacial assessment of CaO-Al2O3-SiO2-MgO slags on MgAl2O4 spinel. Chemeca 2013: Challenging Tomorrow (pp. 154-160). Australia: Institution of Engineers Australia.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2699&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1690

Start Page


  • 154

End Page


  • 160

Place Of Publication


  • http://search.informit.com.au/documentSummary;dn=874336098868991;res=IELENG