Abstract: Iron mineral phase compositions, mineral disseminated particle size, gangue kinds, mineral disseminated situation and so on of raw ore were studied by using process mineralogy method. Study results indicate, main iron minerals in ore are magnetite and hematite-limonite, content distribution of hematite-limonite presents significant increase trend from the middle of stope to both sides, content distribution of magnetite presents gradually decrease trend from the middle of stope to south; iron minerals disseminated particle size is mainly comparatively middle particle size and distributed all the mine, comparatively crude particle size mainly distributes at the north of stope, comparatively fine particle size ore mainly distributes at contact position of orebody and surrounding rock; difficult dissociated and difficult beneficiation ore mainly distribute at -30 m step, easy dissociated and easy beneficiation ore mainly distribute at -42 m step, these distribution law could guiding site production half quantitatively.

Key words: Process mineralogy, Iron mineral phase, Gangue distribution, Disseminated particle size