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High quality mullite insulation brick for sale in sunrise refractory

Date:2019-04-08 17:18 | From:Zhengzhou Sunrise Refractory | Author:admin
High alumina refractories with mullite as the main phase are called lightweight mullite insulation bricks. Generally, the alumina content is between 65% and 75%. In addition to mullite, the mineral composition contains a small amount of glass phase and cristobalite, and a higher amount of alumina also contains a small amount of corundum.
 
Lightweight mullite insulation bricks are currently available in sintered mullite bricks and fused mullite bricks according to their production process:
1. The sintered mullite brick is made of high alumina bauxite clinker as a main raw material, and a small amount of clay or raw bauxite is added as a binder, which is formed by molding and firing.
2. The electric melting mullite brick is made of high alumina, industrial alumina and refractory clay, and is added with charcoal or coke fine particles as a reducing agent, and is formed by reduction electrofusion after molding.
 
Product characteristics of sunrise refractory mullite insulation brick:
1. Low thermal conductivity: It has a good heat insulation effect, which can make the thickness of the furnace wall thin.
2, low heat capacity: due to its light weight and low thermal conductivity, lightweight mullite brick series products accumulate little heat, the energy-saving effect in the intermittent operation of the kiln is very obvious.
3. Low impurity content: It has a very low content of low melting of iron and alkali metals, and thus has high refractoriness. The higher aluminum content allows it to maintain good performance under reducing atmosphere.
4. High thermal compressive strength.
5, accurate dimensions: speed up the masonry, brick joints are thin and uniform. Ensure that the masonry has high strength and high stability.
6, can be processed into special shapes to reduce the number of blocks and joints.
 
Our mullite insulation bricks can be used as backing insulation for hot refractory linings or other refractory materials in smelting furnaces, firing kiln, flue, refining units, heating units, regenerators, gas generators and pipes soaking furnaces, annealing furnaces, reaction chambers and other similar industrial thermal equipment.
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