Recover particles down to extremely fine sizes


  • The separator is ruggedly built and has proven high availability.

  • Few moving parts except for the matrix ring support rollers combined with controlled slurry velocities gives low maintenance costs

  • Unlike to the WHIMS, the Metso HGMS is capable of handling and recovering particles down to extremely fine sizes due to the possibility to choose a suitable matrix grade with large collection area and to control the slurry velocity during the separation process

  • The flushing sequence takes place outside the magnetic zone and this makes the Metso HGMS less sensitive to the content of ferromagnetic material such as magnetite

  • Due to the magnetization direction, the Metso HGMS is also less vulnerable for blocking of the matrix due to bridging over

  • The capacity increases with approximately the square of the diameter of the equipment while the capacity of the WHIMS normally is proportional to the diameter of its rotor

  • The stray magnetic field is a considerably lower around the Metso HGMS compared with the WHIMS for similar duty

  • The wear of the METSO HGMS matrix is extremely low and replacement is normally due after eight to ten years in operation and sometimes even longer



  • Broad range of applications
  • Processing of fine particles
  • High separation efficiency
  • Simple, reliable design
  • Non-clogging operations
  • Easy flushing of magnetics
  • (Patented backward flush)
  • Low specific power consumption
  • Low maintenance
  • Long component life
  • Minimal monitoring
  • Large process capacity


Process overview

The separator handles particle sizes from 0,1 µm up to 1 mm and due to the excellent control parameters the metallurgical performance is superior. 

Magnet system

The HGMS comprises a solenoid surrounding matrix cassette containing ferritic stainless steel matrix. The solenoid design overcomes many of the limitations of working within the air gap of a conventional horseshoe shaped magnet.
The most important advantage of the design is that the return frame cross section can be increased to cope with higher field strengths without magnetic saturation.

A second advantage is that the direction of the magnetization becomes parallel with the pulp flow and is homogenous over the cassette length. A third advantage is the reduction of stray field around the machine when in operation.

Brochure HGMS Continuous - English Download
Brochure HGMS Continuous - Chinese Download
Brochure HGMS Continuous - Spanish Download
Technical Specification HGMS Continuous - English Download
Brochure HGMS - English Download
Brochure HGMS - Chinese Download

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