製鋼に於ける鋼滓のイオン的擧動について

抄録

A number of papers such as by H. Schenck, F. Korber, and W. Oelsen have much explaihed the function of the slag in steelmaking and provisionally perfected the working instruction of the prest steelmaking. There are, however, many problems left to be solved in its essential details. Some reaulta obtaingd by the author'a egperiment concerned are as followa:
(1) A slag tends to be strongly ionic as the temperature rises, and. the specific electric conductivity κ is in molten state in the order of 1/10-1 Ω^-1 cm^-1 being dissociated into several cations and complex anions. Particularly such silicate or phosphate ions in a molten slag do not always exist in one special form only, but the nighbouring anions of nearly equal construction are considered in a combined mixture statistically or in the form of some of these specified orientations.
Many experimental facts obtained here establish molten slag to be ionic, but they do not give the degrees of dissociation Therefore it is perhaps unfair to insist as some researchers persist that neutral molecules should not remain.
(2) The technique was proposed deciding through the combination of more practical ionic molar energiea of formation (ε) concering the elementary oxides, number of metallic atoms included in the components (m), number of O atoms as the nearest neighbours around them (c: co-ordination numbers) and mole fractione of the elements (n); this quantity was considered to be possibly the precise formula of the slag basicity from the point of view owing to the G.N. Lewis definition of acids and bases, so that it would presumably replace the ambiguous basicity such as customary (CaO)/(SiO₂) ratio etc., judging from the eaperimental results here obtained and also specification of practical data.
(3) It was decidad that B or Br above mentioned were tightly connected with the Martens hardness of a quenched molten slag except the basic ones, which were regarded as strongly microhetercgeneous. Besides we discussed two kinds of irreversible phenomena like the electric conductance of a molten slag observed and the viscosity associated with it, as compared with the excellent studies by O. Esin, Kheinman and others (U. S. S. R.) who claimed about the ionic constructions of a molten slag. Specially we supported the Grotthuss type mechanism by meane of O-- concerning the conductance, and emphasized the important. role of O-- played in the estensive fields.
(4) Also the attempts introducing the FeO activity from the statistical treatment in the ternary system GaO-SiO₂-FeO referred to. O. Esin & V. Kozheurov were interpreted, and so they seemed to be pretty well suitable for the esperimental facts with more or less defects. We hope that (n) inB or Br should be correctly understood through such considerations and other experimental measurements.
In these intermediate stages of studies, we can only anticipate the peculiarities of interface reactions between slag and metal in high tempeture, but it is hard to attain the quantitative analysis of reaction mechanism or "Slag Control", and "Reaction Control" instantly.