BELZONA EXTENDS THE LIFE OF THIS SCREW PRESS

KHIA ID: 288
Industry: Pulp & Paper (PLPR)
Application: SHM-Solids Handling Machinery (SHM)
Substrate: Steel
Customer Location: Paper mill in Wisconsin, U.S.A.
Application Date: 1999
Products:

Belzona® 1311 (Ceramic R-Metal)

Belzona® 1321 (Ceramic S-Metal)

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.
Photograph Descriptions
  1. Overall view of the Andritz screw press
  2. Surface preparation by grit blasting
  3.  Finished application
  4. After 6 months of operation
Application Situation
Shaft wall thickness of an Andritz Screw Press.
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
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