Brick

Refractory brick can be classified as follows:

Magnesite- and dolomite bricks are mainly used in the upper transition-, burning- and lower transition zones of the rotary kiln itself.

High-alumina brick is found in the safety zone of the rotary kiln, as well as in kiln hoods and coolers.

Fireclay brick is employed extensively -- in the preheater, in the rotary kiln inlet zone, in tertiary air ducts, and in kiln hoods and coolers.

Cement or mortar is often used to join bricks. Cements harden at room temperature, while mortars normally require a temperature of at least 300 degrees before they are properly cured.