Firing system Rotary kilns

Overview
These industrial rotary kilns are engineered for continuous high-temperature processing with optimised heat transfer and mid-kiln fuel/air injection to stabilise reaction temperature. Shell internals, refractory lining and materials are selected to match process requirements and to limit wear.

Key benefits

• Precise thermal control: mid-kiln fuel and air injection combined with optimised shell internals enable accurate reaction temperature management.
• Extended service life: fully floating cast or forged riding rings, proprietary sleeve bearings and tailored shell materials reduce wear and operational stress.
• Operational safety and protection: drive/coupling and roller guards, heat shields, roll-back control, maintenance brakes and bearing thermocouples support safe operation.

Design & features

• Heavy-duty cylindrical rotating shell with application-specific refractory lining.
• Internal design optimised for efficient heat transfer across a range of processes.
• Mid-kiln fuel and air injection system for precise reaction temperature control.
• Fully floating cast or forged riding/support rings to ensure smooth rotation and reduced shell stress.
• Proprietary sleeve bearings and hydraulic/mechanical thrust devices to minimise vibration and maintain alignment.
• Girth gear and robust gear-drive configuration with drive protection systems.
• Shell materials and linings selected to control wear for specific feedstocks and temperature profiles.

Applications & materials

• Thermal treatment and processing of minerals and industrial materials.
• Materials handled include: alumina, bauxite, catalysts, clay, dolomite, diatomaceous earth, iron ores, ilmenite, lightweight aggregate, limestone, magnesite, petroleum coke, phosphates, rare earths, soda ash, spodumene, vanadium salts and chromite.
• Typical processes: calcination, roasting, drying, reduction, sintering and other high-temperature treatments in mining and minerals processing.

Maintenance & Service
Comprehensive lifecycle support is available, including pilot testing, commissioning, inspections and parts supply to maintain performance throughout the equipment life.

• In-house test centre for process simulation and rapid evaluation.
• Commissioning and installation support to ensure correct start-up and alignment.
• Aftermarket services: inspections, troubleshooting, spare parts, component replacement, retrofits and operator training.
• Support for fuel conversions and alternative energy systems such as hydrogen firing, oxyfuel combustion and electric heating.

Technical specifications

• Diameter range: approximately 1 m to 6.5 m.
• Length: up to around 200 m (application-dependent).
• Designed service life: typically 25 years or more with correct maintenance.
• Drive type: gear drive rotary kiln configuration.
• Temperature control: mid-kiln fuel/air injection for reaction temperature control.
• Mechanical features: fully floating riding rings (cast or forged), sleeve bearings, thrust devices for alignment, girth gear and drive protection.
• Safety instrumentation: support bearing thermocouples, kiln position indication, drive/coupling and roller guards, heat shields, roll-back control and maintenance brakes.