What are the simple ways to distinguish between excessive clay bricks and less fired clay bricks?
Refers to the internal combustion brick to save raw material and fuel in clay mixed with waste parts containing combustibles, such as coal cinder, coal gangue and fly ash, and make the fuel burning in a brick in the baking process, so as to obtain uniform calcination temperature and combustion, called by this method of roasting brick brick.
Generally speaking, compared with the exterior burning brick, the internal combustion brick not only saves the clay and the waste material, but also has smaller volume density, lower thermal conductivity, and can increase the intensity by about 20%. Burnover light color, sound, low intensity; burned brick deep color, crisp sound, high strength, irregular size. These two kinds of bricks are unqualified products.
When the production of sintered clay brick, brick baking in an oxidizing environment and a kiln, produce red brick; if the first brick in an oxidizing roasting, and then watering stuffy kiln, the kiln to form reducing atmosphere, makes the three brick red iron oxide is reduced to a high oxygen low iron and preparation so blue. The durability of brick brick than good.
