How to select the correct furnace for your unique thermal process
Interested in the pros and cons of different high temperature industrial furnace technologies? Harper is here to help guide you through identifying the ideal system for your unique process considerations, material characteristics, manufacturing parameters and facility constraints.
The design of an optimized thermal processing line is a complex set of considerations and challenges. Your unique material deserves the attention of a uniquely qualified partner. Harper’s expertise is proven, as we have collaborated with customers on hundreds of installs worldwide, batch and continuous, from 500°C to 3000°C for a range of advanced materials.
Contact our experts at any time to discuss the ideal system for your advanced material process, or use the interactive chart below to guide you with basic information on Harper’s technologies.
|Reactor Type||Typical Material Profile||Material Handling Transport||Volumetric Utilization||Homogenity of Reaction||Typical Production Volume||Relative Energy Efficiency||Residence Time|
|Rotary Tube||Ideal for powder and bulk materials with good flowability||Via rotating tube and angle of inclination||Moderate||High||Moderate||High||For materials with Low residence times|
|Pusher / Roller Hearths||Used for powders, bulk materials and net shapes with flowability issues||Transport in saggers via Pushers||Moderate||Moderate||Moderate||Moderate||For materials with Moderate to High residence times|
|Mesh / Strip Belt||Used for powders, bulk materials and net shapes||Via mechanical belt||Moderate||Moderate||Moderate||Moderate||For materials with Low to Moderate residence time|
|Vertical Tube / Slot||Ideal for powders||Via gravity or set by Rotary valve or auger||High||Moderate||Low||High||For materials with Low to High residence times|
|Horizontal Slot||Ideal for fibers with excellent flowability||Material generally not in contact with furnace. Utilizes tension stands||Low||Moderate||High||High||For materials with low residence times|
|Batch Furnace||Ideal for low production volumes||Saggers||Low||Low||Low||Low||For materials with Moderate to High residence times|
|Fluid Bed||Used for powders and pellets||Gas stream||Moderate||High||Moderate||High||For materials with Low to Moderate residence times|
|Microwave||Used for powders and parts||Via saggers, belts, or rotary tube||Moderate to High||High||Moderate to High||High||For materials with Lower residence times|
Harper’s range of experience across different applications allows us to deliver a unique solution for each customer, with precise control of temperature up to 3000˚C:
Additional educational resources:
- Get a tour of advanced Rotary furnace designs
- Explore Microwave processing technologies
- See a complete Carbon Fiber process line in action
- Learn about energy efficient thermal processing in this white paper
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