Refractory bricks have a certain ability of heat insulation, but its thermal insulation is far less than that of glass fiber and wool.
The light brick inside the brick is heat insulation brick, according to the different bulk density, the effect is also different
It can not be generalized, generally, the insulation performance of clay is not good, but the hollow is good, such as light mullite bricks have good insulation. it depends on what kind of refractory brick
