A wide range of sintering experiments were carried out in order to use a large quantity of fine iron ore for the sintering process and to improve the properties of product sinter. Modeled mini-pellets (named duplex pellets) which consisted of coarse iron ore particles as cores and fine mixture, of which chemical composition was specified to a quaternary (CaO-SiO2-Al2O3-Fe2O3) calcium ferrite, as shell layer were used in the present experiments. The effect of ratio of shell in pellet and of iron ore characteristics on the sintering process and metallurgical properties of the product sinter were examined. The maximum bed temperature decreased with increasing ratio of shell in pellet from 50 to 80 mass%. Reduction degradation property of product sinter was improved with increasing ratio of shell in pellet. When the ratio of shell was 80 mass%, reduction degradation property of product sinter was improved by the use of fine iron ore with good reactivity with limestone.
|ジャーナル||Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan|
|出版ステータス||Published - 1990|
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Metals and Alloys
- Materials Chemistry