焼結過程におけるカルシウムフェライトの生成に及ぼす原料の賦存状態および雰囲気の影響

概要

論文の詳細を見る
Study on the formation of calcium ferrites in the course of sintering under different atmosphere were carried out by use of mixtures of iron ore, limestone, silica sand, kaolinite, CaCO_3 reagent and Al_2O_3 reagent to fit the quaternary calcium ferrite composition. In the course of heating, the formation of calcium ferrites is influenced by the particle size of silica sand, however the particle size of limestone has not so much affects. In specimens mixed with kaolinite as source of SiO_2 and Al_2O_3,the incongruent melting temperature of calcium ferrites is higher about 50℃ than that of other specimens mixed with silica sand and Al_2O_3 reagent. In the course of cooling, the formation of calcium ferrites was affected by atmosphere. In specimens cooled at N_2 atmosphere, the peritectic reaction between iron oxides and slag melts does not occur. In specimens cooled at air atmosphere, calcium ferrites are formed by the peritectic reaction between iron oxides and slag melts below 1250℃ and the shape of calcium ferrites exhibits columnar at high cooling rate and accicular at low cooling rate respectively.calcium ferritesinteringiron oreimage analysisquaternary calcium fertiteEPMAkaoliniteduplex pelletsmicrostructuresinter structure
東北大学の論文
1986-09-30