Exploring the Use of Iron Ore and Pellet Dusts in Sinter Production: A Comprehensive Evaluation

Abstract

Silico-ferrite of calcium and aluminum (SFCA), a significant equilibrium crystalline phase in the Fe2O3-CaO-Al2O3-SiO2 ternary structure, is an effective bonding form in the sintering process of fine iron ore. The current study investigates the effects of using pellet dust instead of iron ore in sinter blend in SFCA phases. Investigation of the internal structure of the sinter is critical in terms of its physical and metallurgical properties. In this study, the sinter pot experimental conditions were simulated to the actual sinter mill situation. The chemical structure of SFCA compounds was defined as both SFCA and SFCA-I phases in the SiO2-CaO-Fe2O3 and Si-Ca-Fe ternary-phase system. The comparison of the sinter samples with each other revealed that the sinter mixture with a pellet dust fraction of 13.53% in the Sin-3 probably achieved the best similarity in reaction rate and formed the larger ratios in SFCA and SFCA-I. This approach ensures that all sintering parameters are controlled, thereby enhancing the mechanical and technological quality of the sinter, which will result in a more stable charge to the Blast Furnace.