BELZONA REBUILDS MOUNTING SURFACE OF BALL MILL JOURNAL

KHIA ID: 2961
Industry: General Industry (GIND)
Application: GSS-Gaskets, Seals and Shims (GSS)
Substrate: Steel
Customer Location: Cement Plant, Bulgaria
Application Date: November, 2011
Products:

Belzona 1321 (Ceramic S-Metal) Belzona 1812 (Ceramic Carbide FP)

Problem: Ingress of lime particles and water caused severe wear between feed screw insert andball mill journal. The diameter is 1500mm and length 200mm. 
Photograph Descriptions
  1. Sealing the inner joint
  2. Sealing the outer border with metal ring. Injection ports were drilled in thel ring
  3. Rebuilding of the mounting surface by injection of Belzona® 1321 
  4. Completed application with Belzona® 1812 applied at the frontal interface between ball mill journal and screw insert
Application Situation
Ball Mill for grinding lime used in cement production
Application Method
Application was carried out in accordance with Belzona Know-How Leaflet GSS-9.  Belzona 1321 was injected into annular gap between new screw insert and ball mill journal. After that Belzona 1812 was applied at the frontal interface between insert and journal to prevent further abrasion from lime particles.
Belzona Facts
Previous repairs by welding and machining of the mounting surface were not successful due to  problems with machining and centralising the insert. As a consequence the significant movement and vibration caused the mounting surface to wear quickly and the ingress of the ground lime particles  further increased abrasion. The Belzona solution allowed the mounting surface to be rebuilt with zero deviation using the new screw insert as former after its alignment in the journal. The heavy movement and vibration was therefore stopped. 
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