水モデル実験によるRH脱ガス装置の鍋内混合

概要

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In order to recognize the mixing of molten steel in a ladle with RH reactor, the water model experiment was carried out.The results are as follows:(1) The circulation rate extremely depends on the methods of gas injection. Better result can be obtained when an up-leg has multi-nozzles and gas bubble reaches near the center of the up-leg.(2) The flow coming out from a down-leg reaches the bottom of the ladle and goes up as if it creeps along the bottom. The short circuit flow between the down-leg and the up-leg does not occur.(3) It is better to make the down-leg turn towards the center of the bottom of the ladle in order to reduce flow stagnant zone.(4) In the case of multi-leg RH and in the case that the area of the down-leg is different from the up-leg, the circulation rate is higher when area of the down-leg is bigger than the up-leg. On the other hand, the mixing time is shorter in the opposite case.This can be explained by that the mixing time is the function of energy of flow from the down-leg rather than the function of the circulation rate.
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