The riser duct recycles heated air from lower cyclone stages and within the kiln itself, thus improving the thermal efficiency and reducing fuel costs. Dalmia GSB´s based anti-coating castables are highly resistant to abrasion and provide a maximum service temperature of 1600℃.
A Tertiary Air Duct is a part of the Preheater that bypasses the kiln and is used to divert the combustion air required for the calciner from the kiln hood. Here, tertiary airflow is controlled using various gates. Dalmia’s anti-coating High Alumina Bricks provide excellent resistance to abrasion along with coating repellence.