Light refractory brick refers to a shaped block-shaped insulating refractory product having a heat insulating property inside a porous structure. The production process has the following types.
(1) Cut directly into a specified size in natural porous lightweight ore.
(2) Making fire bricks from natural or artificial porous lightweight materials.
(3) Add flammable combustibles such as sawdust, carbonized rice husks, and polystyrene light balls to the mud; or add sublimation materials such as naphthalene to burn out and volatilize to form a porous structure.
(4) adding a foaming agent, such as rosin soap, to the mud to form a porous structure after firing.
(5) Carbonate, aluminum powder and hydrochloric acid are added to the mud, and a porous structure is obtained by a chemical reaction to emit a gas.
Light Refractory Brick Type
Lightweight clay brick 1200～1400℃, which is made by combustible method and has wide application.
Lightweight high alumina brick 1500～1350℃, foam method, good heat resistance, used for high temperature insulation.
Light corundum brick 1600 ~ 1800℃, high Al203 content, the main crystal phase is corundum, can be used under reducing conditions.
Lightweight silica brick, 1220～1550℃, high softening temperature and good thermal stability.
Magnesium 1600 ~ 1800 ℃ good heat resistance, high temperature.
Zircon, 1500 ℃, foam production, for ultra-high temperature furnace insulation.
Zirconia: 2000 ℃ foam production, for ultra-high temperature furnace insulation.
Cordierite: 1300 ℃ Small thermal expansion and good peeling resistance.
Silicon carbide, 1300 ℃, good corrosion resistance, good chipping resistance,high temperature strength.
What is Standard Weight of 0.6 Lightweight Refractory Bricks?
The standard brick size code T-3, the size is 230*114*65 (mm), the specific gravity is 0.6g/cm3. The formula is: 2.3*1.14*0.65*0.6=1.022 kg, which is about 1 kg.
Light Refractory Brick precautions
1. Light refractory bricks have large porosity and loose structure, and cannot be used for direct contact with molten slag and liquid metal.
2. The mechanical strength is low and cannot be used for load-bearing structures.
3. The wear resistance is very poor, it is not suitable for contact with the charge, severe wear parts.
4. Can not be used with ordinary refractory bricks.
