Abstract: Huadan oolitic hematite in Liangshan district is similar with that in Xuanlong.The particle size of oolitic is relatively big while the content of phosphorus is relatively low.The ore of the oolitic hematite is gangue impurity,which is made up of a concentric lamina with interphase or mixed hematite and gangue.The boundary line of hematite and gangue is not clear,belonging to this kind of ore that is easy to break and grind but hard to separate.According to its characteristics,the experimental research on m...