Question
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]
viscosity of steel = 6 * 10-3 kg/m/s]
Answer: Option B
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