Economics

MAGNETIC FILTER FOR PAPER PULP

Goudsmit Magnetics Group of Waalre has recently made a series of magnetic filters that aresuitable for removing baling wire from paper pulp. These steel wires hold bales of cellulosetogether and –when everything goes as it should– are removed before the cellulose is processedinto pulp. This is done in an automated process followed by human inspection. In practice, theprocess is never perfect and steel wire still occasionally ends up in the paper pulp. This causesdamage to the pulp processing equipment, as well as production downtime. Placing a magnet inthe paper line prevents equipment damage, downtime and therefore significant losses.


Magnetic filter



The magnetic filters for paper pulp have a large bore for product flow, ranging from DN100 toDN400. This passage is completely surrounded with very strong magnetic bars with a high fluxdensity (also referred to as the Gauss value), making it possible to capture the steel wire even at arelatively high flow rate. In addition, the magnetic insert is fitted with a sturdy guide and pneumaticrods, which simplifies handling for operators. This is not only ergonomic but also ensures that regularinspection takes place.” It is surprising that magnetic filters are not yet standard in paper lines. Thisseems to be an under-recognized problem that is often only considered after the first damageincident occurs. The investment for these filters is not small, but the payback time is short, since thecost of damage or downtime is many times greater than the purchase price of the filter.

Baling wire


In a nutshell, a magnetic filter removes iron baling wire from paper that is to be processed forcellulose, serves as protection for the installation and prevents downtime of the production process. Several large Dutch paper manufacturers have built a magnetic filter into their process. Currently this solution is gaining more and more attention abroad, especially from large paper producers in Sweden, France and Indonesia. 


For more information please contact:

Koen Böggemann – Sales Magnetic Separation
GOUDSMIT MAGNETICS GROUP
Waalre – The Netherlands
Tel.: +31(0)40-2213283
www.goudsmitmagnets.com
kb@goudsmit.eu
separations@goudsmit.eu
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