The effect of the gas jet on the gas/liquid reactivity in the metallurgical vessel.

Abstract

The effect of the turbulent gas jet on the reaction characteristics in gas blowing was investigated by the simultaneous measurements of gas/liquid interfacial area and gas holdup. Gas/liquid interfacial area was measured by KOH/CO2 model system on the fast pseudo first-order reaction, and gas holdup was measured by using the electrical conductivity method. By estimating the mean diameter of bubbles from the measured data of gas/liquid interfacial area and gas holdup, in the gas/liquid two phase region, the jet effect on the improvement of the reactivity was investigated.Both the specific interfacial area and the gas holdup were increased as the aspect ratio decreased. The variations were larger in a high gas flow rate and in a small nozzle diameter. The effect of nozzle diameter was larger in a low aspect ratio. The calculated mean diameter of bubbles was slightly increased with the increase of the nozzle diameter and the aspect ratio. The result shows that the increase in the reacting interfacial area according to the development of jet was mainly affected by the increase of gas holdup through being dense of bubble swarms in the jet.