Abstract: Bao Steel' concentrator adopts a flowsheet consisting of low intensity magnetic separation, high intensity magnetic separation and flotation to recover iron concentrate and rare-earth concentrate. The originally used high intensity magnetic separation equipment was φ3200 horizontal ring separators, which had the deficiency of easy blockage of magnetic medium that could lead to deterioration of metallurgical performance. Therefore, based on the lab exploratory test, a series of industrial comparative tests were made between SLon-2000 vertical ring pulsating high gradient magnetic separators andφ3200 horizontal ring separator. The results indicated that for the high intensity magnetic separation operation, SLon separators, when compared with the horizontal ring separators, can improve the iron concentrate grade by 4.05 percentage points and iron recovery by 16.72 percentage points. According to this, the concentrator has gradually replaced the original separators by SLon magnetic separators. The production practice has proven that SLon magnetic separators can not only greatly improve the metallurgical performance but have the advantages of small water consumption, unblocked medium, stable operation, small maintenance and high availability.

Key words: SLon vertical ring pulsating high gradient magnetic separator, Horizontal ring high intensity magnetic separator, Industrial test, Application