Abstract: The two optimization measures including “fine grinding high chromium vanadiumtitanium magnetite” and “replacement of the practical production iron ore with cheap finer Oukong powder(imported)” were adopted. Effects of the percentage of the addition of the high chromium vanadiumtitanium magnetite powder on the quality of oxidized pellets were investigated and the feasibility of adding high chromium vanadiumtitanium magnetite powder was explored. Through both optimization methods， when the ratio of high chromium vanadiumtitanium magnetite was 40%， the compressive strength was 2475N per one and 2005N per one，respectively， while the reduction expansion ratio was 192% and 16% correspondently. These parameters all met the requirements of the practical blast furnace production. So the increasing percent of high chromium vanadiumtitanium magnetite in raw material was achieved and the target of 900000 tons per year of the iron and steel company was reached.

Key words: high chromium vanadiumtitanium magnetite, fine grinding, oxidized pellet, compressive strength, reduction swelling