Volume Density of Refractory Bricks

Refractory bricks are mainly divided into clay refractory bricks, dense clay refractory bricks, high alumina poly light bricks, mullite insulation bricks, high alumina bricks, dense high alumina bricks, silica bricks, magnesia bricks, alumina magnesium bricks, high strength sintered refractory bricks, etc. Various refractory bricks have different raw material ratios and different volume densities, so what are their volume densities?

The volume density of several common refractory bricks at present: the volume density of clay refractory bricks is generally 0.3-1.5g/㎝³, the volume density of dense clay refractory bricks is generally 2.05~2.30g/㎝³, the volume density of low-pore clay bricks The density is generally 2.15-2.25g/㎝³. The volume density of high-alumina polylight bricks is generally 0.6-1.0g/㎝³. The volume density of mullite insulation bricks is generally 0.8-1g/㎝³. The volume density of dense high alumina bricks is generally 2.3-2.6g/㎝³, the volume density of dense high alumina bricks is 2.5-2.9g/㎝³, the volume density of silica bricks is generally 1.80-1.95g/㎝³, and the volume density of magnesite bricks is average. The volume density of alumina bricks is 2.60-2.70g/㎝³, the volume density of alumina bricks is 2.90-3.0g/㎝³, the volume density of high-strength sintered refractory bricks is 2.0-2.3g/㎝³, and the volume density of silicon carbide bricks is generally 2.3 -2.6g/㎝³, etc. These are the bulk densities of common refractory bricks.

There are many types of refractory bricks. In addition to the volume densities of some common refractory bricks mentioned above, there are also some refractory bricks that we don’t often see. The volume densities of some refractory bricks are different from the above ones. This is mainly due to the difference in raw materials and production. Differences in technology are the main factors that affect the volume density of refractory bricks. Generally, the higher the volume density, the smaller the porosity, strength, slag resistance, high-temperature load softening temperature, etc., will be better, and it can also reduce the amount of external slag. Erosion makes the working environment of high-temperature industrial kilns more stable.

Generally, high-temperature industrial kilns will look at the physical and chemical indicators of the entire refractory bricks when selecting refractory bricks. The volume density is also an important indicator to measure the breathability and compressive strength of the entire refractory bricks. Generally, high-temperature kilns will be selected based on the parts used, among which: Improving the service life of refractory bricks usually increases their bulk density. If it is only for thermal insulation, then the bulk density of refractory bricks needs to be reduced to reduce thermal melt and thermal conductivity.