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VOL XVI, NO 12

Belzona® Extends The Life Of This Screw Press

 
 

Industry:

Pulp & Paper (PLPR)

 
 

Application:

Solids Handling Machinery (SHM)

 
 

Customer Location:

Paper mill in Wisconsin, U.S.A.

 
 

Application Date:

1999

 
 

Application Situation:

Shaft wall thickness of an Andritz Screw Press.

 
 

Problem:

The Andritz Screw Press is used to remove water and thicken the pulp stock.The screw shaft on this machine lost nearly half of its 7/8” wall thickness due to abrasion from the fiber as it is pressed against the screw.

 
 

Products:

Belzona® 1311 (Ceramic R-Metal)

Belzona® 1321 (Ceramic S-Metal)

 

Substrate:

Steel

 
 

Application Method:

The application was carried out in accordance with Belzona Know-How System Leaflet SHM-14.

 
 

Belzona Facts:

The shaft had previously been resurfaced by welding at a cost of $12,000, but only lasted 18-months.The manufacturer recommends that the screw only be welded once and then replaced at a cost of $80,000. After 6 months of service, over 75% of the top 0.040” layer of Belzona was still intact

 
 

Photographs Description

  1. Overall view of the Andritz screw press
  2. Surface preparation by grit blasting
  3.  Finished application
  4. After 6 months of operation
 
 
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For more information about Belzona visit: www.belzona.com