自溶性ペレットにおける MgO の分布について

概要

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An investigation on the distribution of MgO in the constituents of the self-fluxed pellets containing MgO was carried out by means of X-ray microanalysis and optical microscopy. The results obtained were as follows : (1) MgO content in magnetite was not always higher even if the chemical analysis of MgO of the pellets was higher, but depended rather on the FeO content of the pellets. Namely, magnetite contained 12.6∿18.4% MgO and 4.5∿7.0% MgO in the cases of FeO content of 0.27∿1.45% and 2.60∿6.74%, respectively. (2) Observed MgO contents in the four phases in the pellets (MgO : 0.3∿6.5%, FeO : 0.27∿6.74%), were as follows : magnetite : 4.5∿18.4%, Ca-ferrite : 0.8∿6.0%, slag : 0∿5.0%, and hematite : 0%. (3) The magnetite phase in the self-fluxed pellets used in the blast furnace of Kobe Steel, Ltd. was proved to be a solid solution whose composition range was (Fe_<0.1>Mg_<0.9>) O・Fe_2O_3∿(Fe_<0.4>Mg_<0.6>) O・Fe_2O_3.
社団法人日本鉄鋼協会の論文
1980-03-01