Abstract: To find Baiyun Obo iron tailings of each elements distribution and enrichment situation in various size grade,chemical analysis were conducted,also further analysis were conducted via computer office,excel software drawing.Results indicated that chemical composition of different grain size tailings can not only reflect the distribution of various elements in different grain size,but also reflect rich information of the mineral composition and particle size of tailings in a certain degree which has the great guiding significance to the optimization of selection process.A lot of useful information can be obtained by using multi element analysis of different particle size of the same kind ore which is worth to be popularized and applied in the research of process minerals.

Key words: Baiyun Obo ore, Iron tailings, Chemical analysis, Process minerals