アーク炉酸化期における低合金鋼の脱硫

概要

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For the purpose of doing without the reduction period on arc furnace refining process, experiment was made about desulphurization of low alloy steel during the oxidizing period.The results obtained are as follows:(1) It is necessary for desulphurization during the oxidizing period to increase the slag basicity, which can be obtainable by removing the slag produced during the melting period.(2) It can be considered that desulphurization does not reach equilibrium state even at the end of oxidizing period, because sulphur distribution between slag and metal is proportional to the specific area of metal.(3) The rate-controlling step of desulphurization early in the oxidizing period seems to be either diffusion of sulphur in the slag or chemical reaction at slag-metal interface, because the rate of desulphurization, which is proportinal to sulphur concentration in the metal, is being influenced by slag composition.
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