01. Causes of damage during production
The first is the cause of damage during the production process: the raw material particles are too fine, the exhaust sequence of high-pressure molding is reversed, and the watering of the grinding head is not accurate when mixing raw materials. Adding too much moisture, aging of the mold, and using too heavy a hammer when pressing bricks are all causes of damage to clay bricks.
02. Damage is also caused by burning.
Clay bricks are damaged during the production process and are caused by firing. When loading the kiln, you must check whether the kiln car is flat. If it is not flat, pad it at the bottom, and when loading the bricks, they must be paved layer by layer. Otherwise, During the movement of the kiln car, the force is uneven, which may cause chipped corners, edges, and disconnections, which are all causes of damage.
In addition, the drying of clay bricks is also very important. If the drying speed is too fast, the thermal stress in the brick body will be too large, which will cause cracks and produce waste products. During firing, the temperature is customized according to the grade of raw materials. During firing, the temperature is not well controlled and the bricks shrink unevenly inside and outside. If the temperature is too high, the fireclay bricks will explode in large areas and even burn out.
03. Causes of damage include mechanical impact, etc.
Other causes of damage to clay bricks during use include mechanical impact, high local temperature, vapor pressure or low viscosity. Due to the use of fireclay bricks in kiln linings, mechanical stress and thermal stress will cause irregular cracks or peeling and damage of fireclay bricks during use.
In addition, under extremely corrosive conditions, the surface of fireclay bricks used will change the internal structure under high and low temperature fluctuations, forming a metamorphic layer. Under the erosion of the lining, the metamorphic layer will cause structural damage and cracks.
04. Wear is the cause of damage
During the use of clay bricks, wear is the main cause of damage. When the bricks are worn to a certain extent during use, the remaining bricks cannot be too thin. If they are too thin, replace them immediately to ensure the normal use of the lining. This reason is a normal factor in use.
