http://www.yanhemagnet.com/mag....netic-assemblies/mag Magnetic Separator price Heavy Medium Drum Separator (HMDS) improves the grade and recovery rate in the dense medium recovery process. We combines the internationally leading Permax technology, established experience in specific applications and specific environments in mineral processing, and reliable high-quality configurations, materials and parts to improve the performance of dense media mineral recovery operations. As a pioneer in the use of rare earth magnets in wet low-intensity drum separators, HMDS utilizes ferrite boron (Fe magnets to increase the magneti