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The selection of process flow of light weight fire clay bricks mainly depends on the quality of the raw material and the quality of the product. The main process is to form high quality clay mud into the mud which can effectively improve the material formability and physical properties of fire clay bricks. The process flow of fire clay bricks is as below:

Light refractory brick has the characteristics of small density, high porosity, small thermal conductivity, good thermal insulation and a certain pressure

strength. Fire clay bricks belong to the light refractory brick which is widely used in heat-treating facility. Below are the properties of light refractory brick.

1. Light capacity: the dry capacity of light refractory brick is only 500-700Kg/m3 which is only1/4 of ordinary concrete, 1/3 of clay bricks and 1/2 of hollow

blocks.

fire clay bricksare sticky soil products which refer to Al2O3 containing 30%~40% aluminum silicate material. The main mineral composition of fire clay bricks are kaolinite(Al2O3?2SiO2?2H2O) and 6%~7% impurities(oxide of potassium, sodium, calcium, titanium and iron). Fire clay bricks adopt 50% soft clay and 50% hard clay clinker, ingredient by a certain size, and sinter under high temperature of 1300~1400℃ after forming and drying.