Eliminate Costly Replacements. Reinforce. Restore. Perform.
The Challenge: Erosion Damage in Coal Mills & MPO Ducts
In coal-fired power plants, critical internal systems such as coal mills, pulverized coal pipework, and Multiple Port Outlet (MPO) ducts are constantly subjected to extreme wear. Over time, the steel liner plates and ducts experience aggressive erosion due to high-velocity fine coal particles and abrasive flows.
Failures in these areas are among the leading causes of unplanned power plant shutdowns and disruption in operational stability. Replacing worn-out liner plates or MPO ducts involves high material costs, long lead times, and extended downtimes—making it an inefficient solution for most facilities.
The Solution: Duromar® HAR + Duro-Tile Wear-Resistant System
Arudra Engineers offers a cost-effective, high-performance alternative through Duromar® HAR, a carbide-filled epoxy putty, combined with Duromar® Duro-Tile, a >90% aluminum oxide ceramic tile system. This combination forms a heavy-duty wear-resistant lining that can be applied directly onto damaged or eroded surfaces without dismantling or replacing the entire structure.
HOW
IT WORKS ?
Duromar® HAR
Duromar® HAR is a trowelable bonding and protective putty designed to withstand high abrasion and impact. It performs exceptionally well in environments with fine coal dust, slurry, or ash particles, offering durable surface protection.
Duro-Tile sheets
Duro-Tile sheets, arranged in a hexagonal layout, are embedded into the HAR layer to form a tough ceramic barrier. This long-lasting surface prevents direct contact between abrasive materials and the underlying metal, extending equipment life.
Duromar® HAR with Duro-Tile offers a smarter alternative to traditional liner and duct replacements—delivering long-term protection, reduced downtime, and cost-effective performance enhancement.
Targeted Application Areas
- Internal surfaces of Coal Mills
- Multiple Port Outlet (MPO) Ducts
- Plug holes and welded zones of liner plates
- Chutes, ash hoppers, and deflector plates
- Slurry lines in FGD systems
For plug holes, a 20mm to 25mm HAR layer is applied to eliminate localized erosion—especially near weld joints. For longer-lasting protection, coating the entire liner plate with 1.5mm to 2mm thickness of HAR provides a more robust, maintenance-free finish.
Duromar® HAR
Type: Carbide-filled refractory epoxy
Application: Applied by trowel for precise surface coverage
Resistance: Withstands fine slurries, abrasion, and impact
Typical Uses: Ideal for coal mills, chutes, elbows, and hoppers
Duromar® Duro-Tile
Material: Made of >90% high-purity Aluminium Oxide
Form: Supplied in durable hexagonal sheet layout
Installation: Embedded securely using Duromar® HAR epoxy
Typical Uses: Enhances surface wear resistance in harsh flow zones
Why Arudra?
At Arudra Engineers, we combine field-proven materials with state-of-the-art application techniques to help thermal power plants extend asset life, reduce O&M costs, and improve overall plant reliability. With over four decades of experience in power sector maintenance, we deliver coating solutions that perform in the harshest industrial environments.
Ready to Reinforce Your System?
Let Arudra Engineers help you restore your eroded coal mill liners and MPO ducts—without the time and cost of replacements.
Contact us today for a plant survey or product demo.