Metso Full portfolio Vertically Pulsating High gradient Magnetic Separator
Vertically Pulsating High gradient Magnetic Separator

Vertically Pulsating High-gradient Magnetic Separator

Effectively process fine, weakly-magnetic minerals with the SLon® Vertically Pulsating High-gradient Magnetic Separator (VPHGMS).

SLon® Vertically Pulsating High-gradient Magnetic Separator (VPHGMS) is a wet, high-intensity magnetic separator that uses a combination of magnetic force, pulsating fluid, and gravity to process minerals. The advanced features are incorporated into a design utilizing a unique vertical configuration, jigging action, and special matrix materials to achieve the best results.

  • Offers superior separation of fine, weakly magnetic minerals
  • Gives you low operating and maintenance costs
  • Operates reliably
  • Offers many advantages over traditional WHIMS type separators
Vertically Pulsating High-gradient Magnetic Separator

Operating principle

Slurry is introduced through slots in the upper yoke to the matrix, which is housed inside the vertical separating ring. The magnetic particles are attracted to the matrix and are then carried outside of the magnetic field where they are subsequently flushed to the magnetic concentrate trough. The non-magnetic or less magnetic particles pass through the matrix through slots in the lower yoke to the non-magnetic collection hoppers.


  • Concentration of iron ore, ilmenite, chromite ore, and other paramagnetic materials
  • Purification of non-metallic minerals like feldspar and silica sands
  • Fine particle applications (<20μm)
  • Replacement of conventional wet, high-intensity magnetic separators (WHIMS)

Vertical ring configuration

The ring is arranged in a vertical orientation as opposed to a traditional Jones-type WHIMS, which uses a horizontal carousel. The vertical nature of the carousel allows for reverse flushing, where magnetics flushing in the opposite direction of the feed allows strongly magnetic and/or coarse particles to be removed without having to pass through the full depth of the matrix volume. In addition, the magnetics flushing is accomplished near the top of rotation, a location with a low stray magnetic field to reduce any residual grip on the magnetic particles. The end result is high availability due to minimized matrix plugging.

Pulsation and slurry bath

An actuated diaphragm provides pulsation in the separation zone to assist the separation performance by agitating the slurry and keeping particles in a loose state, minimizing entrapment. This mechanism also maximizes the particle accumulation (trapping) on all sides of the rod matrix, creating more usable surface area for magnetics collection. A further benefit is to reduce particle momentum, which aids in particle capture by the applied magnetic force. This leads to improved fine particle collection and separation.

Rod matrix

The SLon VPHGMS utilizes a filamentary matrix constructed of steel rods to accommodate various size ranges of feeds. The rods are oriented perpendicular to the applied magnetic field to enable optimum magnetic force to be achieved while minimizing the risk for entrapment of particles, when compared to grooved plates, randomly positioned filaments (wool), or expanded metal sheets.


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