Abrasion protection for coal classifiers with Belzona® 1813
Industry: Power (POWR)
Application: SHM-Solids Handling Machinery (SHM)
Substrate: Quenched and tempered C60 steel
Customer Location: Germany North Rhine Westfalia
Application Date: August 2011
Problem: Extensive abrasion and wear
- View of one of the coal dust classifiers
- Close-up of a coal classifier showing the wear (top right)
- Completed surface preparation
- Application in progress
Coal-fired power station. The coal classifier is installed behind the coal pulverising mills. The pulverised coal is subsequently injected into the boiler furnace via the coal classifier.
Initially, an ASR form was completed and reviewed by the technical team. Belzona® 1813 was applied by hand to the classifier edges and plate sides to a depth of approximately 100 mm.
The life of each classifier had been about six months, with service conditions including temperatures of up to 160°C (dry) and a throughput rate of approximately 5000m3/h per unit. Following the application of Belzona® 1813 on a trial basis, there were few signs of abrasion on the classifier deflector plates upon inspection 10 months later, in 2012. As a result, the customer plans to coat the old classifiers with Belzona® 1813 to prolong service life and other power stations within the group are investigating the use of this technology.