Sökning: "Tuyere"

Visar resultat 1 - 5 av 6 avhandlingar innehållade ordet Tuyere.

  1. 1. A model of gas injection into a blast furnace tuyere

    Författare :Per Hellberg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; blast furnace; Tuyere; modeling; gas injection; CFD; Other materials science; Övrig teknisk materialvetenskap;

    Sammanfattning : .... LÄS MER

  3. 2. The mechanical wear of tuyere refractory and stirring plugs in BOF steelmaking

    Författare :Qixing Yang; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Sammanfattning : Water modelling investigations of pressure change at tuyere tip or back attack and wear of H3B03 disks, as well as high temperature modelling wear tests of BOF refractory using single- or double-tuyere and Ar or N2 gas, have been carried out to study mechanisms for mechanical wear of the refractory for BOF stirring tuyeres and plugs. A new nominal Mach number, M*', was defined and adopted as the criterion for correlating test data. LÄS MER

  4. 3. Co-injection of basic fluxes or BF flue dust with PC into a BF charged with 100% pellets : effects on slag formation and coal combustion

    Författare :Lena Sundqvist Ökvist; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Sammanfattning : Based on 100% pellets operation at BF No. 3 at SSAB Tunnplåt in Luleå a new pellet with CaO/SiO2=1 was developed during early nineties. The pellet showed good results in metallurgical laboratory test but caused slag formation problems in the bosh. LÄS MER

  5. 4. Optimisation of the slag formation in a blast furnace charged with 100% pellets

    Författare :Lena Sundqvist Ökvist; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

    Sammanfattning : This work is based on experiences from industrial blast furnaces. Process irregularities when testing self-fluxed pellets Process disturbances when charging increased proportions of coarse pellets Laboratory tests to evaluate the effect of basic fluxes on the slag formation in the bosh and in the raceway have been carried out. LÄS MER

  7. 5. Mathematical and Physical Simulations of BOF Converters

    Författare :Xiaobin Zhou; Mikael Ersson; Pär Jönsson; Hans-Jürgen Odenthal; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; BOF; physical model; mathematical model; mixing time; kinetic enregy; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : The purpose of this study is to develop mathematical models to explore the mixing and its related phenomena in converter bath. Specifically, first, a mathematical model of a physical model converter, which was scaled down to 1/6th of a 30 t vessel, was developed in this study. LÄS MER