Model Experiments on Mass Transfer in Gas Phase between an Impinging Jet of Gas and a Liquid Iron

Abstract

Experimental studies have been made in order to analyze the mass-transfer characteristics in the gas phase in the reactor used for chemical reactions between an impinging jet of gas and an inductively-stirred liquid iron. The methods which have been used for the experimental studies are (a) sublimation of naphthalene into a nitrogen stream, (b) evaporation of pure liquids into a nitrogen stream, and (c) absorption of ammonia from ammonia-nitrogen stream into water.
The results obtained are as follows;
1) Average Sherwood numbers in the region of H/d= (H/d) _c are correlated by the equation
Sh=m (r_s/d) ^-1Re^0.66Sc^0.5 (m=0.40±0.13),
and (H/d) _c is correlated by the equation
(H/d) _c=0.00464Re^0.68 (r_s/d) ^1.5 exp (3.96 (d₀/D_T)) (exp (Sc)) /Sc,
where H is the distance from nozzle to diffusing substance, r_s is radius of diffusing substance, d is inside diameter of nozzle, d₀ is outside diameter of nozzle, D_T is inside diameter of vertical wall, Sh=k_Gd/D, Re=duρ/μ, Sc=μ/ρD, k_G is mass-transfer coefficient for gas phase, u is average velocity of gas in nozzle, ρis density of gas, and μ is viscosity of gas.
2) Average Sherwood numbers calculated from published data on the rate of decarburization are correlated by the equation
Sh=m′ (r_s/d) ^-1Re^0.66Sc^0.5 (m′=0.23±0.07).