What are the applications of sand-lime bricks?

Sand-lime brick – it is a fire-resistant product with a SiO2 content of more than 92%. The higher the SiO2 content in silica raw materials, the higher the fire resistance of the product; silicate fire brick has high ability to resist acid erosion and, respectively.

Application of sand-lime brick

Glass industry

Sand-lime brick is mainly used for laying roofs, parapets, suspended walls and flow channels of glass furnaces. According to the temperature of the high temperature gas in the glass furnace, reaching 1615 °C, silica fire bricks on the roof must withstand gravity, mechanical stress and high temperature. Hence, it must have good mechanical properties at high temperatures; Volume stability at high temperatures is good, and the volume of the product cannot be changed during use, otherwise it will cause deformation, damage or even collapse of the oven.

Thermal resistance of sand-lime brick; Light weight and high strength meet the requirements of glass furnaces, so it is widely used in glass melting furnaces.

Ferrous metallurgy

In the iron and steel industry, sand-lime brick is widely used as a refractory lining in high-temperature areas, such as blast furnaces, converters, electric arc furnaces and equipment for continuous casting of billets. It can withstand extremely high temperatures and chemical influences, protecting equipment from molten metal and slag.

Petrochemical industry

Sand-lime refractory brick also has important applications in the petrochemical industry. It is used as a refractory lining for cracking furnaces, catalytic and refining plants. The high temperature stability and resistance to acid and alkali corrosion of sand-lime brick allows it to work stably for a long time in the harsh conditions of petrochemical processes.

Classification of sand-lime bricks

There are many types of sand-lime bricks, which can be divided into: sand-lime bricks for coke ovens, sand-lime bricks for hot blast furnaces, silicate bricks for electric furnaces, sand-lime bricks for glass furnaces, etc..

Depending on the complexity of the brick type, it can be divided into standard brick, ordinary brick, special brick and special brick according to purpose.

Precautions when using sand-lime bricks

(1) Due to the change in the crystalline form of the remaining quartz at low temperatures, the volume of silicon products changes greatly, therefore, the temperature rise below 600°C does not occur too quickly when baking in the oven, and it should be cooled slowly to 600°C, to avoid the formation of cracks.

(2) Avoid contact with the base slag whenever possible..