KHIA headerKnow-How in Action

VOL XXX, NO 143

Belzona® Saves The Bull Gear

 
 

Industry:

Mining and Quarrying (MINQ)

 
 

Application:

Mechanical Power Transmission (MPT)

 
 

Customer Location:

N.E. Washington, USA

 
 

Application Date:

November 2014

 
 

Application Situation:

Ore processing Ball Mill bull gear.

 
 

Problem:

The gears on this Ball Mill bull gear were experiencing erosion and pitting.

 
 

Products:

Belzona 1111 (Super Metal)

Belzona 1321 (Ceramic S-Metal)

 

Substrate:

Steel

 
 

Application Method:

The application area was thoroughly cleaned with solvent and then grit blasted to prepare the surface. All erosion damage was filled in with Belzona 1111 and followed with a brush on coating of Belzona 1321 to protect against further damage.

 
 

Belzona Facts:

If unchecked, the erosion damage could have weakened the bull gear, forcing the need to replace it. There are a total of 5 of these gears with damage and they were manufactured in the 1960's. The replacement cost is estimated at $150,000.00 USD each and roughly 3 months to have them made. This Belzona repair was handled in a couple days by one person and used less than $150.00 USD in material.

 
 

Photographs Description

  1. 1 of 5 Ball Mills.
  2. Erosion damage cleaned and grit blasted.
  3. Application of Belzona 1111.
  4. Application of Belzona 1321.
 
Case study pic one

 

 
 Case study pic two

 

 
 Case study pic three

 

 
 Case study pic four

 

 
 
For more information about Belzona visit: www.belzona.com