Herty 法による Si 脱酸後の酸素変化の測定

概要

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Changes of the oxygen content in liquid iron after silicon addition have been determined by fixing the oxygen as Al_2O_3 with thin aluminum wire previously charged in the sampler and chemically analyzing the aluminum content of the inclusion which is a mixture of Al_2O_3 and SiO_2. The results obtained are as follows : (1) The oxygen values at a certain time after silicon addition are independent of the amount of aluminum charged in the sampler and the kind of the sampler used. (2) The oxygen content gradually decreases and reaches to the equilibrium value. From these results and the calculation about the reduction of SiO_2 particles with aluminum in molten iron, it has been confirmed that besides SiO_2 particles (>1μm), a large number of minute SiO_2 (≪1μm) exist in liquid iron and a part of them remains to the last stage of the deoxidation process. The result that the melt is super-saturated with oxygen untill the equilibrium is reached, is explained by the fact that the minute SiO_2 are easily reduced by aluminum during solidification of the sample.
社団法人日本鉄鋼協会の論文
1976-06-01