鹽基性平爐鋼滓のパンケーキテストによる判定法

概要

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Sampling molten slag with a spoon out of the furnace at several stages of O-H steel refining operation and casting it into a mild steel plate mould, with a diameter of about 75mm and a height of about 10mm, the author examined the relation between the surface texture (top, bot tom and fracture) and the components of slag. The results showed that surface texture of slag pancake could be classified into fiive groups (I. creased, II. intermediate, III. furrowed, IV. spider web, V. concave or flat) according with its basicity. And it was found that in each group, surface texture differed according to the differences in basicity and other components. Consequently it was confirmed that if a standard sample was prepared in advance, components of non-determined sample conld be presumed by comparing with it and its basicity could be estimated with an error of 0.1 or 0.2∿0.3 respectively at under or above 2.5 V_p(=CaO/SiO_2+P_2O_5). Estimation of FeO, MnO and P_2O_5 was also possible to some extent. The time required in the estimation being within 2∿3 minutes and an intricate apparatus or skill being not particularly required, so this method is at present regarded as the most proper one for slag control in O-H operation.
社団法人日本鉄鋼協会の論文
1953-01-25