Small Dryer & Tunnel Kiln

This program adopts the double setting process that is semi-stiff extrusion, drying by the tunnel dryer with small section and fired by the flat ceiling dryer with small section.

The dryer adopts brick-concrete structure, pre-cast concrete roof. Inner wall thickness 240mm, sidewall thickness is 490mm. The thickness of top structural layer and the insulation is 500mm.

The drying agent is the residual heat from Hoffman kiln. The quality of the brick drying will be ensured by adjusting the system to control wind volume and temperature.

Dried bricks are unloaded and set on the dryer car by hand.

The process adopts the tunnel kiln with large section. It is equipped with complete smoke exhausting system, cooling system, heat extracting system, under-car pressure balance system and monitoring system. The firing schedule will be more reasonable through the adjustment of above mentioned systems.

The inner wall under 200 degree in preheating and cooling zone of tunnel kiln is constructed by red bricks. The internal layer of other inner wall and that of firing and heat preservation zone are constructed by clay refractory bricks. The heat preservation layer is constructed by clay insulation brick and filled up by refractory fibro felt (where the temperature curve is more than 600 degree) or by mineral wool felt. The outer wall of kiln is constructed by red bricks.

The top structure of kiln.

The double ends of kiln adopt the cast-in-place concrete roof whose dimension is of one kiln car. For the other parts, the clay brick blocks are hung by high aluminum davit cast on the main beam whose weight is supported by the wall at double sides. High aluminum cotton, refractory fibro felt and mineral wool felt, board are laid on the brick blocks to form the heat preservation layer. The gap between floor boards is filled up by high aluminum fiber. The high temperature castable is painted on the top of heat preservation layer to ensure the adiabaticity of material and the durability of structure.