Light heat insulating firebrick is a kind of stereotyped firebrick with porous structure, which has high apparent porosity and heat insulation performance. It has the characteristics of low thermal conductivity, low volume weight, energy saving, light weight and convenient construction. The use temperature of light heat insulation firebrick is about 900~2000℃. According to the different raw material structure, there are many types of heat-insulating refractory bricks, such as light clay bricks, light silicon bricks, light high aluminum bricks and so on.