るつぼ内液体へのガス吹き付け時のガス側物質移動

概要

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Average mass transfer between an impinging laminar jet of gas and a liquid surface in a crucible was studied. The experiments were carried out in the following systems ; a) H_2O(l)-H_2(g), C_2H_5OH(l)-CO_2(g) and H_2O(l)-CO_2(g) systems with known diffusion coefficients D_<AB>(m^2/s) near room temperature (10∿60℃), b) FeCl_2(l)-N_2(g) system with unknown diffusion coefficient in high temperature (700∿930℃). (1) For the average Sherwood number Sh(≡kd_c/D_<AB>), the correlation was obtained as Sh=m(r_c/d)^<-1>Re^<0.87>Sc^<0.66>, (m=0.56±0.06) by the experiment on systems a) under condition ; 4≤Re≤800, 0.5≤Sc≤1.24, 3.17≤(r_c/d)≤9.5. (2) For the system b), Sh could also be expressed by the above equation above for 20≤Re≤200, r_c/d=2.42. (3) Temperature dependence of the diffusion coefficient of FeCl_2(g) in N_2(g) for 700 to 930℃, 1 atm was obtained as D_<FeCl_2-N_2>=a(T/273)^<2.6>×10^<-4>, (a=0.31±0.01)(m^2/s) based on the similarity between experiments a) and b) for gas-phase mass transfer.
社団法人日本鉄鋼協会の論文
1984-01-01