039 6886322 info@keossrl.it




Keos designs and manufactures gas afterburners for the ceramic industry.


We build gas afterburners for the thermal oxidation of flows deriving from kilns and containing pollutants to be mitigated at high temperature; the afterburner is sized based on the volume and characteristics of the flow being handled.

This process makes it possible to transform polluting substances into harmless substances.


Keos specializes in the design and construction of kilns afterburning systems for:




Technical Ceramics


Artistic Ceramics

Fire test



Description of operation

  1. The afterburner is raised to the treatment temperature of 1,200 °C. In this phase room air is supplied to the afterburner. The room air is extracted by the activated kiln smoke extraction hood


  1. The firing cycle or the kiln firing test must only be started when the treatment temperature of 1,200 °C of the afterburner is reached


  1. During the execution of the firing cycle or firing test, the temperature of the afterburner is maintained at 1,200°C. The temperature of the smoke to the afterburner flue fan is also checked continuously.


  1. At the end of the firing test, the afterburner needs to be deactivated by the personnel.

The machines are designed completely in-house. Thanks to the collaboration of technicians and select suppliers, the entire construction stage is carried out by our technical department.
Lastly, we oversee and perform installation and final testing of the machine at the customer’s site.

Description of the system

Once the required collection system been activated the afterburner needs to be started with the following sequence:

– switch on the smoke flue fan
– switch on the combustion air fan
– switch on the burners

Switching on the smoke flue fan will create a vacuum in the afterburner and activate the collection system draught (hoods).

When the treatment temperature of 1,200°C is reached, the personnel can start the firing test cycle.

The afterburner is equipped with an automatic temperature control system.

Flame presence is checked continuously on the single burners with the electrode system (ionisation).

A continuous afterburner temperature system automatically interrupts the gas supply to the burners if the maximum operating temperature is exceeded.

To avoid odours and steam from leaking out before the flue, the afterburner works in vacuum.

The smoke dilution air to the afterburner flue is adjusted so that the temperature of the smoke to the flue is not hotter than 160°C.

The temperature of the smoke from the afterburner is immediately abated after it is discharged, in a pipe section of about 2 metres.

A continuous maximum operating temperature verification system of the smoke flue fan automatically starts the safety dilution air fan, when it is close to this threshold.

If the maximum operating temperature is exceeded, the gas supply to the burners of the afterburner is automatically shut off.

The anomaly is reported by a specific alarm.