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Recently, the quality of sinter feed ore used in sintering process has deteriorated. In particular, T.Fe has decreased and gangue component, e.g. SiO2 and Al2O3 has increased in the sinter feed ore. It was reported that the reducibility of CaO·FeO·SiO2 is lower than 2CaO·Fe2O3, CaO·Fe2O3 and CaO·2Fe2O3 in the mineral texture of self-fluxing sintered ore.1) Moreover, increase of Al2O3 in iron ore decreases fluidity of melts generated during sintering reaction and disturbs the bonding between particles and rearrangement of pores, as a results sinter strength decreases.2) Therefore, to cope with the deterioration of iron ore qualities, usage of high grade iron fine instead of low grade iron ore is studied. But, fine ore usage for sintering process decreases sinter productivity by decreasing permeability in the sintering bed. Sakamoto et al. predicted particle size reduction of iron ore in the future and offered the new process characterized by disk pelletizer (HPS: Hybrid Pelletized Sinter process).3) There are urgent issue to enhance the readiness of iron resources like studying on alternative iron ore resources and development of its utilizaImprovement of Sinter Productivity by Control of Magnetite Ore Segregation in Sintering Bed