Abstract: Slon vertical ring pulsating high gradient magnetic separator is a new generation of high intensity magnetic separator. In 2004, three SLon-1750 separators are used for recovering Ilmenites from taillings of iron processing with high intensity magnetic-flotation separating technique in Heishan Ilmenite Processing Plant of Chengde Iron & Steel Company, which has successfully solved the technical problem of producing unacceptable Ilmenite concentrate over the year.