鹽基性平爐鋼滓の化學的構成に就て

概要

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In the course of the basic open hearth slag by means of petrographic and analytical research. the existence of the following three stages of slags was observed ; (1) the melting-down-stage slag consisting of the CaMn (Mg) SiO_4 matrix and magnetite, (2) the refining slag composed of dical ciumsilicate and the dissolved FeO (more or less containing the undiss Ived lime and magnesia), (3) the highly basic slag of tricalciumsilicate and dicalciumsilicate matrix. No phenomenal change was observed in the effect of slag-forming materials on the slag composition, excepting the case of alumina. Some relationship to the slag viscosity and the undissolved materials floating as suspension in the dissolved slag was noticed. In the melting of Cr bearing steel with the basic open hearth furnace, Cr exists as chromite, Fe (CrO)_2, in the slag and equilibrium between bath and slag was expressed by following reaction : 4FeO+2Cr=Fe(CrO_2)_2+3Fe, and the equilibrium constant covering the range of Cr_2O_3 in slag 0.3∿12% was established ; that is, logK=Cr(FeO)_2/(Cr_2O_3)=-41, 500/T+23.1▱.
社団法人日本鉄鋼協会の論文
1943-07-25