A Water Model Study on Mixing Characteristics of Gas-Liquid Two-Phase Flow in a Kaldo Furnace
Based on similarity theory,a water model was constructed with a 1:4.5 scale-down ratio compared to the industrial Kaldo furnace.Innovatively,acid-base neutralization decolorization and dimensional analysis were proposed to investigate the influence of various process parameters,including gas flow rate(Q),injection lance height(h),furnace rotation speed(ω),liquid phase volume fraction(φ),liquid viscosity(μl),and furnace tilt angle(θ),on the mixing time(t)of gas-liquid two-phase flow in the molten pool.A dimensionless mathematical relationship was established between t and D(inner diameter of the furnace),h,ω,φ,Fr(modified Froude number),μl and θ.The research results showed that the mixing time decreased with increasing gas flow rate,decreasing lance height,increasing liquid phase volume fraction,decreasing liquid viscosity,and increasing furnace tilt angle.The research findings may provide theoretical references for efficient smelting and optimal design of the Kaldo furnace.
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