Rotary Kilns

Rotating drum furnaces for calcination, drying, and material transformation. Engineered for continuous operation in cement, chemical, and mineral processing plants.

Direct Fired — Fuel burner inside drum. Maximum heat transfer rate, suited for high-throughput calcination where material can tolerate direct flame contact.

Indirect Fired — External shell heating. Protects sensitive materials from combustion gases — required for pharmaceutical-grade oxides and specialty chemicals.

Design & Construction

Shell fabricated from rolled mild steel plate, stress-relieved and precision-machined for concentricity. Tyres (riding rings) are shrink-fitted onto the shell and ride on support rollers aligned to within 0.5mm TIR.

Refractory lining is application-specific: dense alumina bricks for high-temperature calcination, castable refractory for moderate duty, or ceramic fiber blanket for rapid thermal cycling.

Seals at feed and discharge ends prevent air ingress and product loss. Spring-loaded graphite seals for high-temperature service, labyrinth seals for moderate duty.

Commissioning & Installation

Full installation supervision covering:

• Foundation design verification and concrete pour checks
• Roller and bearing alignment to 0.5mm TIR
• Refractory lining dry-out procedure — critical for long kiln life
• Burner calibration and temperature control commissioning
• 40-hour burn-in run with continuous load monitoring

Maintenance

• Bearing lubrication every 250 operating hours
• Tyre bolt inspection and re-tensioning at 1,000-hour intervals
• Refractory buildup cleaning every 3–6 months depending on feedstock
• Burner nozzle replacement annually
• Spare parts inventory maintained for all critical components