Sökning: "Ladle"

Visar resultat 1 - 5 av 35 avhandlingar innehållade ordet Ladle.

  1. 1. A study of slag-steel-inclusion interaction during Ladle treatment

    Detta är en avhandling från Stockholm : Materialvetenskap

    Författare :Johan Björklund; KTH.; [2006]
    Nyckelord :TEKNIKVETENSKAP; TECHNOLOGY; Ladle treatment; steel; slag; inclusions; ladle; refining; vacuum; tool steel; oxide activity; slag models; oxygen; equilibrium;

    Sammanfattning : The thesis is based on two supplements with two major objectives. In the first supplement equilibrium top slag-steel bulk and inclusions-steel bulk were investigated by comparison between calculated and measured oxygen activity values. This was done by applying different oxide activity models for slags combined with thermodynamic calculations. LÄS MER

  3. 2. Formation of oxide-inclusions by ladle glaze and a preliminary examination on the possibility of inclusion seperation by bubble floatation

    Detta är en avhandling från Stockholm : Materialvetenskap

    Författare :Nagendra Tripathi; KTH.; [2003]
    Nyckelord :oxide inclusions; ladle metallurgy; ladle glaze; inclusion population; ladle age;

    Sammanfattning : The present work was to study the role of ladle glaze as apotential supplier of inclusions to the steel melt during theladle refining process. In this study, the total number ofinclusions at the beginning and at the end of the ladletreatment process was found to be increasing with ladle age,which is the number of heats, the ladle being used. LÄS MER

  4. 3. Growth and removal of inclusions during ladle refining

    Detta är en avhandling från Stockholm : Materialvetenskap

    Författare :Mats Söder; KTH.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Meteorology; inclusions; steel; ladle; cluster growth; modelling; Meteorologi;

    Sammanfattning : The overall purpose of this thesis work has been to further our understanding of the growth and removal of inclusions in gas- and induction-stirred ladles. The primary focus has been on alumina inclusions. Growth mechanisms were studied using data from fundamental mathematical models of gas- and induction-stirred ladles. LÄS MER

  5. 4. Growth and Removal of Inclusions During Ladle Stirring

    Detta är en avhandling från Stockholm : Materialvetenskap

    Författare :Mats Söder; KTH.; [2001]
    Nyckelord :inclusions; ladle; gas-stirring; induction-stirring; secondary refining; bubble flotation;

    Sammanfattning : The growth and removal of inclusions in stirred ladles hasbeen studied. First, the importance of different growthmechanisms suggested in the literature were studied. Simulationresults from a fundamental model of an induction-stirred ladlehave been used as input in the calculations. LÄS MER

  7. 5. Thermodynamic Aspects on Inclusion Composition and Oxygen Activity during Ladle Treatment

    Detta är en avhandling från Stockholm : KTH

    Författare :Johan Björklund; KTH.; [2008]
    Nyckelord :TEKNIKVETENSKAP; TECHNOLOGY; Ladle treatment; thermodynamics; inclusions; steel; slag; equilibrium; ladle treatment; vacuum; oxide activity; oxygen activity.;

    Sammanfattning : Two industrial studies and one set of lab scale trials have been done. In addition, a theoretical study has been done. The main focus has been on non metallic inclusion composition during the ladle refining operation in industrial steel production. Sampling has been done together with careful inclusion determination. LÄS MER