Some Introduction about Magnetic Filter Bar

What is magnetic filter bar?

The magnetic filter bar is a kind of common magnetic assembly, and widely used in many industries. The surface of magnetic filter bar will generate strong magnetic field strength rely on its particular internal designing, then removing iron contained impurities and magnetic substance from pending material. The magnetic filter bar is also the most important component for magnetic separator system. The magnetic filter bar is the main consumers of the permanent magnet industry.

The main parameters of magnetic filter bar

The diameter and length of magnetic filter bar.
The Max. Operating Temperature.
The working condition of magnetic filter bar.
The Max. Surface Gauss Value.
The polarity of magnetic filter bar.
The request about end faces.

The structure of magnetic filter

The structure of magnetic filter can be divided into four parts:

Stainless steel tube.
Permanent Magnets.
Spacers
Stainless steel plug.

The magnet in magnetic filter bar

The type and grade of the magnet in a magnetic filter bar base on the different requirements of Max. Operating Temperature and Max. Surface Gauss Value. The Ferrite, NdFeB and SmCo can all be applied in magnetic filter bar. It is important to emphasize that the majority of magnets in magnetic filter bar are non-coated magnets. According to the simulation results and practical production experience, the magnet with the sharp corner is more apt to help magnetic filter bar to get higher Max. Surface Gauss Value. In general, there is no need to worry about the magnets in magnetic bar will be corroded, and the chamfer process before surface treatment will remove the sharp corner of magnets.

Production process of magnetic filter bar

The type of magnetic filter bar

The type of magnetic filter bar can be divided into three types according to magnetic filter bar’s end surfaces:

Threaded hole-type.
Double screw bolt-type.
Tip-type.

The influence of magnet’s dimension on Max. Surface Gauss Value of magnetic filter bar

As we can see from the simulation results, the Max. Surface Gauss Value of magnetic filter bar with thick magnet is much higher than thin‘s one under the same grade, then we can find the high gauss magnetic filter bar has larger affected area from the cloud map of magnetic field and magnetic field lines.

The magnetic filter bar with different Max. Surface Gauss Value has its own application objects. The magnetic field lines form a “spider web” in the space around the magnetic filter bar.

The spider web area of high gauss magnetic filter bar much larger than low-gauss one, and the spider web gap is the opposite. The spider web theory can reveal that the high gauss magnetic filter bars are appropriate for thick and large objects, and low gauss magnetic filter bars are apply to small and thin objects.