Why is it necessary to bake the kiln? The refractory brick, concrete and cement in the kiln system all contain more water. If the water is not evaporated in the kiln first, the temperature of the lining will rise sharply, and the attached water will evaporate rapidly in large quantities, resulting in large expansion force inside the lining and concrete, thus causing the refractory brick to explode and concrete cracks. In serious cases, the phenomenon of concrete falling off, firebrick drawing, brick dropping, etc., will also appear crust blockage after feeding.