Abstract: The main mineralogical characteristics which may affect the beneficiation indexes of ilmenite were clarified through the analyses on the composition，texture，structure of the ore，the occurrence and alteration types of the ilmenite，the energy dispersive spectrum and disseminated grain size of the ilmenite.Factors influence the separation performance of the ilmenite was also analyzed.The results show that the titanium elements dispersively distributed in the ore，and the ilmenite was generally scattered in the gangue.The titanomagnetite was distributed along the edge of ilmenite in some area of the ore，and the rutile，hematitization，and sphene were observed along the surface，edge，inter-granular and the crack of the ilmenite.The grain size of the ilmenite was relatively small.Due to the oxidization，partial ilmenite was embedded intricately with sphene，this would influence the product quality of the titanium ore concentrate.The ilmenite ore could not be fully disassociated even if under fine milling procedure.Research results provide references and suggestions for the mineral processing technology of the ilmenite ore.

Key words: Ilmenite, Mineralogical characteristics, Separation performance, Disseminated grain size, Alteration, Intergrowth