This is the zone where the last of the kiln feed is calcined. The physical Transition Zone is that portion of the kiln that lies between the Calcining Zone and the Burning / Clinkering Zone of the kiln. Temperature of this zone varies from 1200℃ to 1400℃. This is a critical zone of the kiln since liquid formation starts here causing high level of chemical attack on refractory. Very often second tuyere of the kiln is located in this area causing additional mechanical stress on the refractory. Dalmia GSB´s dual-bonded high alumina bricks with low porosity and low permeability are perfectly suited to fight chemical attack.
This is the kiln tip area where clinker falls into the cooler at about 1300℃. This area is often lined with either brick or castable. Refractory in this area should have high thermal shock resistance and high abrasion resistance.
Dalmia GSB´s anti-coating high alumina bricks are known for their resistance to abrasion and superior coating repellent properties.
The hood provides a cover to the outlet discharge area of the kiln as well as the hot part of the cooler with bull nose. The burner passes through the kiln hood and extends up to the kiln outlet. This area is subjected to abrasion from dust carried through secondary air and becomes more challenging for refractories when a tertiary air duct is also connected through the kiln hood. Dalmia’s low cement based special castable DALRESISTAL is highly resistant to abrasion and alkali attack.
The burner pipe passes through the kiln hood at the kiln’s hot end, arranged more or less along the kiln’s centre line. Fuel is projected into the kiln at high velocity through the burner pipe. Very often burner pipe is subjected to tremendous abrasion at the bottom from dust coming up from cooler. Refractory for burner pipe should have high refractoriness, high thermal shock resistance and abrasion. Dalmia GSB´s anti-coating SiC based castables are highly resistant to abrasion and alkali attack making them most suitable for burner pipes resistance.