Sökning: "Slags"

Visar resultat 1 - 5 av 354 avhandlingar innehållade ordet Slags.

  1. 1. Densities and viscosities of slags : modeling and experimental investigations

    Författare :Mikael Persson; Seshadri Seetharaman; Rob Brooks; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; density; nolar volume; thermodynamics; enthalpies; model; slags; oxide melts; viscosity; mould flux; continuous casting; Metallurgical process engineering; Metallurgisk processteknik;

    Sammanfattning : The present dissertation describes part of the efforts directed towards the development of computational tools to support process modeling. This work is also a further development of the Thermoslag software developed in the Division of Materials Process Science, KTH. LÄS MER

  3. 2. Investigations of thermophysical properties of slags with focus on slag-metal interface

    Författare :Luckman Muhmood; Seshadri Seetharaman; Nurni Neelakandan Viswanathan; Allan Cramb; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; slags; density; diffusivity; sessile drop; interfacial velocity; interfacial viscosity; interfacial dilatational modulus; interfacial shear viscosity; Metallurgical process engineering; Metallurgisk processteknik;

    Sammanfattning : The objective of this research work was to develop a methodology for experimentally estimating the interfacial properties at slag-metal interfaces. From previous experiments carried out in the division, it was decided to use surface active elements like sulfur or oxygen to trace any motion at the interface. LÄS MER

  4. 3. Measurements of the thermodynamic activities of chromium  and vanadium oxides in CaO-MgO-Al2O3-SiO2 slags

    Författare :Pengli Dong; Seshadri Seetharaman; Mselly Mbwambo Nzotta; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermodynamic activity; chromium oxide; vanadium oxide; equilibrium; slags; slag basicity; gas-equilibration technique; Metallurgical process engineering; Metallurgisk processteknik;

    Sammanfattning : In the present work, the thermodynamic activities of chromium and vanadium oxide in CaO-SiO2-MgO-Al2O3 slags were measured using gas-slag equilibration technique. The slag was equilibrated with a gas mixture of CO, CO2 and Ar gases enabling well-defined oxygen partial pressures in the gas mixture (PO2=10-3,10-4,10-5 Pa) at temperatures 1803, 1823K, 1873, 1923 K. LÄS MER

  5. 4. Thermodynamic Studies of the Fe-Pt System and “FeO”-Containing Slags for Application Towards Ladle Refining

    Författare :Patrik Fredriksson; KTH; []
    Nyckelord :Thermodynamics; Activity; Galvanic cell; Calorimetry; Gas equilibration technique; Iron-platinum alloys; FeO; Slags; Modelling; Ladle;

    Sammanfattning : In the present work, the thermodynamic activites of ironoxide, denoted as "FeO" in the slag systems Al2O3-"FeO", CaO-"FeO", "FeO"-SiO2, Al2O3-"FeO"-SiO2, CaO-"FeO"-SiO2and "FeO"-MgO-SiO2were investigated by employing the gasequilibration technique at steelmaking temperatures. Thestrategy was to expose the molten slag mixtures kept inplatinum crucibles for an oxygen potential, determined by aCO/CO2-ratio. LÄS MER

  7. 5. Sulphide capacities of mulicomponent slags

    Författare :Mselly M. Nzotta; KTH; []
    Nyckelord :;

    Sammanfattning : In the present thesis, experimental measurements have beencarried out to determine the sulphide capacities of the binaryslags Al2O3-MnO, "FeO"-SiO2, "FeO"-CaO, "FeO"-MnO, ternary slags Al2O3-MgO-SiO2, Al2O3-MnO-SiO2, Al2O3-CaO-MgO, MgO-MnO-SiO2, Al2O3-MgO-MnO,"FeO"-Al2O3-SiO2, "FeO"-CaO-SiO2, "FeO"-MgO-SiO2, "FeO"-MnO-SiO2,quatenary slags Al2O3-CaO-MgO-MnO, Al2O3- CaO-MgO-SiO2,Al2O3-CaO-MnO-SiO2, CaO-MgO-MnO-SiO2, quinary slag Al2O3-CaO-MgO-MnO-SiO2, and the six component slag "FeO"-Al2O3-CaO-MgO-MnO-SiO2.The technique used was to bring the melt to equilibrium witha gas mixturecontaining Ar-CO-CO2-SO2. LÄS MER