Rotating Magnet Cleans Powders, Granules Without Stopping Production

The automatic cleaning, rotary cleanflow magnet separates metal particles of 30 µm and more from powders and granulates.

2 Min Read
Image courtesy of Goudsmit Magnetics

Goudsmit Magnetics recently launched a rotating Cleanflow magnetic separator suitable for installation in free-fall lines in a continuous process.

Cleaning takes place without stopping the product flow - a request from a customer who wanted to recycle cans of milk powder in a continuous process. During the cleaning cycle, the magnets stay in the product flow. This guarantees the user that no iron falls back into the product during cleaning--something that was regularly a problem with other systems.

The unit can be used in the chemical, ceramic, plastics, and recycling industries, among others. In the latter case, it is used to make plastic or rubber granules metal-free.


The magnetic bars in the Cleanflow magnetic separator filter metal particles and paramagnetic particles from 30 µm out of powders and granular products.

The separator is suitable for high-capacity product flows (up to approximately 60 cu m/hr) and distinguishes itself by the high magnetic flux density of more than 9,000 gauss at the contact surface of the bars.

The disadvantage of fatty (milk) powder is that this product does not flow well. This is why the magnetic bars rotate in the product flow.

This ensures that the bars remain clean and the metal dirt comes into optimal contact with the magnets. The result is not only a high degree of separation, but also a high metal separation capacity.


With many magnetic separators, the magnets need to be removed from their housing during a cleaning cycle to remove the trapped metal particles.

However, this method creates the risk that metal falls back into the product flow and that production must be suspended in order to clean the separator. That is why this new system was designed so the magnets remain in the product flow during cleaning. Only the metal-contaminated sleeves around the magnetic bars are removed together with the metal particles, which are subsequently replaced by clean sleeves.

Goudsmit Magnetic Systems BV, Waalre, The Netherlands +31 (0)40-2213283

About the Author(s)

Powder Bulk Solids Staff

Established in 1983, Powder & Bulk Solids (PBS) serves industries that process, handle, and package dry particulate matter, including the food, chemical, and pharmaceutical markets.

Sign up for the Powder & Bulk Solids Weekly newsletter.

You May Also Like