Division KELLER
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Firing process

Kiln technology

Our different kiln types, such as tunnel, chamber or Enviro kilns, ensure energy-saving and optimum product-specific firing of your products.

Thanks to our K-Matic process control system, we always guarantee reliable control of the firing process, an optimum overview, repeatability and extensive process evaluation options.

Ventilation systems

Various circulation systems are available for KELLER kilns, both for the heating and cooling areas of the kiln. Depending on the kiln car setting geometry, we select the optimum system for your application.

The following systems are available:

  • circulation type: ceiling - ceiling
  • circulation type: wall - wall
  • circulation type: ceiling - wall


The need for heating with renewable energy sources has risen sharply in the course of the energy transition. We offer you a wide range of options for heating your kilns using both fossil fuels and sustainable fuels.

The following heating systems are available:

  • gas burner plants with high-speed burners, injector burners, Impulse burners and clean gas burners
  • low calorific gas burner plants with wood gas burners or coal gas burners
  • oil burner plants with diesel high-speed burners and diesel or heavy oil injector burners
  • solid fuel burner plants
  • microturbines with exhaust gas utilization
  • electric heating registers, electric heating modules and electric duct heaters
  • all burner plants also with preheated combustion air
Brochure Flyer Pure gas burner type HT

Heat recovery

The need for heat recovery from kiln exhaust air has risen sharply in the course of the energy transition. We offer you a wide range of options for heat recovery.

The following systems are available:

  • thermal oil heat exchanger
  • polymer heat exchanger
  • ORC process


Energy consumption during drying and firing is directly related to heat transfer and flow conditions.
CFD calculations help to find thermodynamically and fluid-dynamically optimized solutions in advance. This is why we use them.
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