Refractory bricks are refractory ceramic blocks used to connect fireplaces, fire boxes and stoves. They are different from ordinary masonry bricks because they can withstand temperatures up to 1800 degrees Fahrenheit. The chemical composition of dense refractory bricks is different from ordinary bricks. Refractory bricks are different from ordinary bricks in terms of color, shape and thermal conductivity.

Air temperature

Refractory bricks have fire resistance. They are also called fireplace tiles. They are used to build wood-burning ovens, fire boxes and cooking rooms for fireplaces. They are also used to produce small or large industrial furnaces. They are heavy and have low porosity. On the other hand, traditional bricks or masonry bricks have more holes.

The chemical composition of refractory bricks includes 23% alumina and 73% silica. The remainder is iron oxide, titanium and other metal oxides. The main chemical components of ordinary bricks are silica, alumina, magnesia, lime, iron oxide and alkali. If the content of these ingredients is more or less than the required amount, it may cause serious damage to the bricks. In the case of ordinary bricks, the ingredients are slightly bonded, while refractory bricks are denser.

Color and shape

Refractory bricks are naturally white. During the manufacturing process, stains will be mixed into the mud, discoloring the bricks. Some popular colors include espresso, moss green, red and black. The color allows the bricks to match the surrounding applications, just like ordinary bricks are made with different colors. The color of ordinary bricks varies with the type of soil used. Refractory bricks are uniformly rectangular, while ordinary bricks may have uneven shapes.

Thermal conductivity

The thermal conductivity of ordinary bricks is much higher than that of refractory bricks. Refractory bricks can withstand high temperatures because ceramics, iron oxides and other chemical additives can absorb without transferring. Low thermal conductivity can provide higher energy efficiency and insulation value. Therefore, dense refractory bricks are used in environments with extreme mechanical or thermal stress. Wood kilns or furnaces are some applications that require refractory bricks. The dense properties also make the bricks have stronger wear resistance. Ordinary bricks are not suitable for these applications.