Permanent-magnet filter systems

Cost saving benefits

• Low operating costs
  Chips and abraded particle residues are automatically and continuously separated.
• Small space requirements
  The roller is located in or on existing coolant tanks.
• Improved surface quality
  Lower scrap quota with greater surface quality.
• Longer service life
  Longer production runs due to increased grinding wheel and tool service life.
• Dry sludge discharge
  A special scraper and our magnet system ensure minimum residual moisture.
• Always clean coolant
  Prevents bacteria build-up and ensures better working conditions. In addition, the service life of the coolant is extended.

Operation

An extremely strong magnetic system is used with the permanent-magnet drum. It is a particularly efficient and yet simple filter unit. The rotating drum has a strong magnetic field over its entire surface and a larger surface due to appropriately developed pole rings These penetrate the coolant as far as the guide plate. Experience over many years, the perfectly conceived and hydraulically correct design and also the use of permanent magnets have produced a unique magnetic system which achieves a particularly high separation output. The magnets are the product of modern technical material developments and are made of ceramic permanent-magnet material with strong anisotropic properties. Magnets produced from this material maintain this magnetic field even in the most adverse conditions.
The contaminated coolant or industrial fluid must be settled (steady, not turbulent) and flow into the system distributed over the whole system width. The uniformly settled function of the liquid has a very great effect on the achievement of a high degree of filter efficiency.
Magnetisable contaminants such as abraded particles amongst other things and also the non-magnetic grinding wheel abraded particles adhering to the ferromagnetic particles are attracted and discharged by the magnetic roller rotating counter to the flow direction of the coolant.
The adjustable scraper made of wear-resistant sheet metal is located in the discharge direction ascending to the magnetic roller so that the remaining discharged residual fluid has the opportunity to flow back into the system whilst the abraded particles are propelled over the highest point. The abraded particles drop into the sludge box behind the scraper. Inlet flow rate ideally < 0.5 m/s.