발간논문

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Vol.34, No.3, 387 ~ 397, 1996
Title
Research Paper - Pyrometallurgy - : New Slag Volume for Iron Ore Sinter ( Control of calcium ferrite in iron ore sinter - 1 )
이대열 , 신형기 , 문석민 , 정원배 , 정원섭 Dae Yeol Lee , Hyoung Ky Shin , Seok Min Moon , Won Bae Chung , Won Sub Chung
Abstract
Low SiO₂ and high basicity sintering tests were carried out to reduce the slag volume in sinter without causing any deterioration of sinter properties. New slag volume(NSV) was defined instead of slag volume as the concept of content of bonding material. Low SiO₂ and high basicity sintering condition reduced the slag volume from 21.0% to 19.3% without any deterioration of the productivity and the strength of sinter. The strength of sinter was determined to be highly dependent on the content of calcium ferrite. NSV, defined as the sum of slag volume and calcium ferrite content, proved to be a useful index for the strength of sinter. NSV increased with the decrease of SiO₂during fixed CaO content due to the increase of calcium ferrite although slag volume decreased. In pot tests, as SiO₂ content decreased from 5.90% to 5.28% while CaO remained at 10.5%, the productivity and the strength of sinter tended to improve.
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