Rotary Tube Furnaces

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Harper designs advanced Rotary Tube Furnace solutions for continuous processing of materials such as granular, powder, or particulate aggregates in high purity and specialty atmosphere environments at temperatures from 500 to 2400°C.

Harper Rotary kilns offer exceptional versatility, reliability and energy efficiency. Our designs include multiple patented features that enable better mixing, resulting in improved heat transfer and mass transfer. The absence of moving parts in the tube support system provides a simple, reliable, robust design that enhances scalability. Additionally, the tumbling action of the product within the tube results in high degrees of temperature uniformity and gas-solid contact, producing a more homogenous product, reducing processing times and increasing production rates.

We offer the unique ability to accommodate a variety of process atmospheres that others cannot. Our excellent seal designs, advanced gas monitoring and handling systems, and indirect heating method allow the use of flammables and toxic gases. Harper approaches the design of a Rotary calciner as a complete system, with the ability to incorporate process control systems, gas treatment and handling, turnkey installation and complete field commissioning.

Our Rotary systems are ideal for processes such as pyrolysis, drying, calcination, reduction, controlled oxidation, carburization, purification, waste remediation and more.

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