Clay bricks - 18 square pieces

Product description of 18 square clay bricks:

Clay bricks, also known as sintered bricks, are small man-made blocks used in construction. Clay bricks are made of clay (including shale, gangue and other powders) as the main raw material, and are processed, shaped, dried and baked. There are solid and hollow types.

Clay bricks are mainly composed of mullite (25% to 50%), glass phase (25% to 60%), cristobalite and quartz (about 30%). Usually hard clay is used as the raw material, and the clinker is pre-calcinated, and then mixed with soft clay, formed by a semi-dry method or a plastic method, and fired at a temperature of 1300 to 1400 C to produce clay brick products. It is a commonly used refractory brick in blast furnaces, hot blast furnaces, heating furnaces, power boilers, lime kilns, rotary kilns, ceramics and refractory brick firing kilns.

Load softening temperature of clay refractory bricks:

Because clay refractory bricks appear in liquid phase at lower temperatures and begin to soften, and will deform if exposed to external force, the load softening temperature of clay bricks is much lower than the refractory degree, only about 1350°C.

Slag resistance:

Clay refractory bricks are weakly acidic refractory bricks, which can resist the erosion of acidic slag, but have slightly less resistance to the erosion of alkaline slag.

Thermal shock resistance:

Clay refractory bricks have a small thermal expansion coefficient and good thermal shock resistance. The number of water cooling times at 850°C is generally 10 to 15 times.

High temperature volume stability:

Recrystallization occurs in clay refractory bricks at high temperatures, which reduces the volume of the refractory bricks and produces a liquid phase. Due to the tension on the surface of the liquid phase, the solid particles are brought closer to each other, the porosity is reduced, and the volume of the refractory bricks is reduced. Therefore, the clay bricks shrink under the action of high temperature.

Applications of clay refractory bricks:

Clay refractory bricks are widely used in metallurgy, building materials, chemicals, petroleum, machinery manufacturing, silicate, power and other industrial fields。

For example, clay bricks are used in lower-temperature parts such as blast furnaces, hot blast furnaces, iron furnaces, open-hearth furnaces, electric furnaces and glass melting furnaces. In addition, clay bricks can be used in ladles, refractory bricks for pouring systems, heating furnaces, heat treatment furnaces, combustion chambers, flues, chimneys, etc.

Physical and chemical indicators: