焼結原料擬似粒子の核となる鉱石の鉱物特性評価(焼結鉱・ペレット)(<特集>製銑)

概要

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In order to evaluate the coarse ores which become nuclei in quasi-particles and unmelted particles in sinter, their mineralogical properties were investigated. The granulating ability and the reducibility of coarse ores were characterized on the basis of the porosity of pores with diameters smaller than 100μ before and after rapid heating up to 1350℃, respectively. The fusibility of a nucleus particle was determined according to the recrystallization degree of hematite grains after heating, which was related closely to the porosity. Sintering tests were carried out by using some kinds of quasi-particles which differed in the porosity of nucleus particles to clarify the influences of the mineralogical properties of coarse ores on the production and the quality of sinter. The productivity was reduced with increasing the fusibility of coarse ore as a consequence of the decrease in the permeability of the melting zone in the sintering bed and the strength of sinter cake. The reducibility of sinter depended on that of coarse ores.
社団法人日本鉄鋼協会の論文
1982-11-01