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Discussion :: GATE Metallurgical

  1. Ladle deoxidation of liquid steel is done at 1600°C by adding ferro-aluminium. By assuming Stokes law behaviour, time (in s) required for alumina particles of 50 μm diameter to float to the surface from a depth of 2 m would be__________ 
    [Given: density of steel = 7000 kg/m3, density of alumina = 3650 kg/m3, viscosity of steel = 6 * 10-3 kg/m/s]
    2. A.
    6767 to 6783
    B.
    2626 to 2632
    C.
    8989 to 8995
    D.
    1212 to 1218

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    Answer : Option B

    Explanation :

    -NA-

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