Cold model experiments were performed to make clear the critical condition causing the entrapment of slag under bottom gas injection.Entrapment of slag was judged from visual observation.The following empirical correlation of the critica] Iiquid velocity on the centerline of the vessel a,t,* was derived.a,1, ./ V=I .2(v* /v~)o,068(H*/D) --0.11 dB/D 0.6 .0.3 45 mN/m (T~* 63 mN/m a,t * = I .2u.P -0.28 u. = (gO../H~)1/3P = {O~, ./ (9H"5,) }1/5 V= (a~**glp*) 1/4 where, g: the acceleration due to gravity, O* .: the critical gas flow rate for the entrapment of slag, p~: the thickness of metal layer, a~*: the interfacial tension between slag and metal, p*, p~: the densities of slag and metal, v*, v~: the kinematic viscosities of slag and metal, H*: the thickness of slag [ayer, D: the bath diameter.dE: the bubble diameter.This correlation could predict the critical gas flow rate O~* for previous hot model experiments as well, provided that the flow patterns in the baths were similar to the present case.
No takes yet. Share an insight, caveat, or question.
Iguchi et al. (1994) studied this question.