底吹き取鍋, LD 転炉および RH 脱ガス装置における混合特性の比較

概要

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The theoretical correlation between mixing time (τ) and mixing power density (ε) which was presented in the previous work is confirmed through water model experiments for bottom blowing ladle, LD converter and RH degassing process. In the flow controled predominately by inertia force or turbulent viscous force, τ is proportional to ε^<-1/3>L^γ in the three vessels where the power (γ) to vessel size (L) depends on the vessel type. The value of γ reflects the turbulent structure of agitated liquid and it is an essential factor for scale-up. Thus, the precise information of turbulence, i. e., the velocity variation is measured by a hot-wire anemometer and a spectral analysis of the velocity fluctuation is computed by the method of FFT (Fast Fourier Transform). The dissipation energy of turbulence (ε^^-′) can be evaluated from the information of the spectral analysis. A correlation between τ and ε^^-′ is presented in a unified foshion without regard to the kind of vessels.
社団法人日本鉄鋼協会の論文
1983-07-01