For specialty processing needs, from charcoal production & activation to reduction

How Calcination Works

Calcinatination (also commonly referred to as calcining) is the decomposition of a material by heat.

Processes Induced through Calcination



Calcination often uses heat, sometimes in the absence of oxygen, to induce one or more of the following things:

  • Phase Transition/Change
  • Removal of a Volatile Fraction
  • Decomposition
  • Removal of Crystalline Water
  • Chemical Separation (Dissociation)


Rotary kilns are extremely flexible thermal processing devices, and are capable of processing a wide variety of materials. Some of the materials commonly calcined in a rotary kiln include:

  • Ceramics and Refractories
  • Alumina
  • Ores
  • Coal
  • Calcium Carbonate

Equipment Used

Rotary kilns are used to carry out the calcination process. Depending on the process goals and the material to be processed, the kiln may be of the direct-fired, or indirect-fired type.
It is also common to follow the calcination process with a rotary cooler. This efficiently cools the material after it has been calcined, so it can move on to transportation or storage.
Natural gas burner
Pulverized Coal Burner
Fuel Oil Burner