Calciner Technology

The introduction of calciner technology increases clinker production and ensures that the rotary kiln keeps a manageable dimension.

Calcination rates in excess of 90% are achieved with approximately 60% of the total fuel directed to the calciner. As combustion and calcination of raw material take place outside of the rotary kiln, the heat loading of the kiln is reduced and smaller rotary kilns are possible.

All IKN calciners are based on a modular system. Systems can be designed according to the fuel used or other specific requirements.

The following calciner configurations are available (customised calciners on request):

Calciner type
Special features
Retention time (s)
Alternative fuel (AF) used
 Stage combustion  possible


Ignition in hot zone


High and medium grade



Ignition in pure air


High to low grade