In the paper, some basic characteristics of rare earth in Bayan Obo Mine and the present situation of grading rare earth concentrate in North Rare Earth High-tech Co., Ltd. are introduced; the concentration, grade and granularity of overflow mine obtained by the first section permanent magnetic tailings of Bayan Obo Magnetite after stage-grinding and stage-separating in Dressing Plant of Baotou Steel with swirler are analyzed; the technical route and technical index for grading high grade rare earth concentrate with overflow mine of swirler are established, which lay a foundation for the smooth development of industrial test. The industrial grading for overflow of swirler has been realized in the Rare Earth Dressing Plant with the original production technology.

rare earth  /  separation  /  stage-grinding and stage-separating  /  magnetite  /  overflow of swirler