Refractory fireclay brick as the main raw material, mud treatment, molding, drying and roasting. Minerals mainly kaolinite clay (Al2O3 · 2SiO2 · 2H2O), and 6% to 7% of the impurities (potassium, sodium, calcium, titanium, iron oxides). Clay brick firing process, mainly kaolinite dehydration decomposition process continue to generate mullite (3Al2O3 · 2SiO2) crystals. SiO2 and Al2O3 in the fireclay brick in the firing process with a low melting point eutectic forming impurity silicates surrounds mullite crystals.
Bricks from local materials, cheap, durable, as well as fire protection, thermal insulation, sound insulation, moisture absorption, etc., for use in a wide range of civil construction projects. Scrap bricks can be made of concrete aggregate. To improve ordinary brick block small, self-important, the consumption of soil many shortcomings, forward lightweight, high strength, hollow, chunks of direction.
