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Do you know this knowledge of lightweight refractory bricks?

Date:2019-08-20 17:19 | From:Zhengzhou Sunrise Refractory | Author:admin
Light refractory bricks generally refer to refractory bricks having a density of less than 1.3 x 103 kg/m3. Lightweight refractory bricks have been widely used in heat treatment equipment because of their low density, high porosity, low thermal conductivity, good thermal insulation and certain compressive strength. 
This product adopts technical and mechanical forming means to produce refractory balls of various materials and specifications. The product has a high bulk density and a low creep rate, that is, the load has a high softening point, and is resistant to rapid cooling and rapid heat. It has good corrosion resistance, can effectively improve the smelting conditions, increase the hot air temperature, reduce the ironmaking energy consumption, make the ball type hot blast stove develop large-scale, long life becomes a reality, and has achieved good economic benefits.
Lightweight high-aluminum insulation refractory bricks are used as insulation layers and linings that are not affected by high-temperature molten materials and aggressive gases. At the same time, the lightweight brick has low normal temperature resistance, poor wear resistance and poor thermal shock resistance, and cannot be used for load-bearing structures, and should not be used for parts that are in contact with the charge and are seriously worn. In short, since the lightweight refractory brick has the above disadvantages, its use is often used as a heat insulation layer, lining or heat preservation of the kiln.
Therefore, mullite lightweight bricks developed with mullite, kyanite and other raw materials can directly contact the flame, and are resistant to high temperatures and high strength. They are used in cracking furnaces, hot blast stoves, ceramic roller kiln, electric porcelain drawer kiln, glass crucible And a variety of electric furnace lining.

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