Thermal Processing

For High Temperature Applications

Want to find out more about this offering?

Get in touch
Calciners are an affordable option for high temperature processing of many materials

Calciners are an affordable option for high temperature processing of many materials

Bartlett-Snow™ Rotary Calciners

Bartlett-Snow™ Rotary Calciners are a highly effective and cost-efficient means for high temperature processing of various granular products and powders. The unit is specially designed to provide for controlled and uniform process conditions. 

 

Advantages

Compared to conventional tunnel kiln or mesh belt style equipment 

  • Maximum Product Uniformity – the material bed is constantly being turned over, all of it is exposed uniformly to its required environment. 
  • Greater Yields – all of the material is processed, none is overheated or underheated. 
  • Reduced Process Time Factor – due to uniform exposure and dynamics of the products, process time requirements are drastically reduced. 
  • Capital Costs – with reduced process time requirements, the equipment is smaller and therefore less costly. 
  • Operating Costs – material is continuously conveyed eliminating the ongoing replacement costs of holding containers and automation devices.

Related Industries

  • Chemicals
  • Batteries
  • Food & Pet Food
  • Minerals

Process

Material is fed into a rotating cylinder that is externally heated according to process related time versus temperature criteria. As the cylinder rotates, the material is gently tumbled as it flows from the feed end of the cylinder to the discharge end. The action promotes uniform exposure of the product to a defined environment. Various processes employ reaction gases in direct contact with the product to propagate a given reaction or cover gases to protect the product. 

Proper selection of the calciner cylinder material is critical and is determined by process temperature, process compatibility and physical size considerations. 

  • Metallic Alloys – 2250°F / 1230°C
  • Quartz – 2200°F / 1200°C
  • Ceramic – 2800°F / 1540°C
  • Graphite – 3632°F / 2000°C

Design features

Bartlett-Snow™ rotary calciners are provided with automatic temperature, pressure and electrical controls with furnaces featuring multiple gas, oil or dual fuel burners, or electrical heating elements arranged in zones. Available in sizes ranging from 6-120 in / 152-3048 mm diameter with lengths from 10 to over 100 ft / 3.04 to over 30.48 m. Co-current or counter-current. 

Typical material processed

  • Active Carbon
  • Catalysts
  • Ceramic Compounds
  • Sludges
  • Contaminated Soils
  • Ferrites
  • Manganese Dioxide
  • Metallic Oxides
  • Rare Earths
  • Tungsten Compounds
  • Titanium Oxide
  • Titanium Oxide
  • Uranium Compounds
  • Vanadium Compounds
  • Zinc Oxides
  • Molybdenum Sulfide

Do you want to learn more about replacement parts?

Replacement Parts

Literature Downloads

Do you need more information on thermal processing equipment?

Contact form

Subscribe to the Coperion Newsletter