Abstract
This paper deals mostly with an action of oxygen during the refining of steel. For determinat ion of oxygen in steel, Herty's aluminium method was adopted. Complete analyses of both steel and slag were made in each stage from melt down to tap in studying the bath condition. adefinite conclusion was made from the results obtained.FeO content of the slag which may be indicated by the color charts tells fairly well the nature of the heat. Appearance of steel samples taken from the bath at the final stage of the refining indicates fairly well the kind of heat obtained.The bath condition can be estimated by the type of carbon curve obtained by plotting the carbon content of the bath at each stage, especially at the time of the lime addition.Silicates in steel are extremely harmful to steel and should therefore, be removed first at the boiling stage. The formation of silicates in the bath may be prevented by working the heat in such a manner that the silicon will not be reduced. This may be done by the use of lime stone during the working of the heat.Silicates formed at the final stage of melting may be removed according to the wellknown Stokes' principle.
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