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What is mullite insulation brick?

Date:2019-08-15 16:52 | From:Zhengzhou Sunrise Refractory | Author:admin
The mullite insulation brick can be known from the name. It is a lightweight refractory brick with thermal insulation function produced by mullite. The following Sunrise refractory material will introduce to you in detail what is mullite insulation brick, interested friends. Can understand.
 
High alumina refractories with mullite as the main phase are called 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. The product has low thermal conductivity, good thermal insulation effect; high refractoriness; high aluminum content keeps its performance under reducing atmosphere; high thermal compressive strength, the product can contact flame, The application is very extensive.
 
What are the characteristics of mullite insulation bricks?
1. Low thermal conductivity and good thermal insulation effect;
2. The mullite insulation brick has low heat fusion. Due to the low thermal conductivity, the mullite series of lightweight thermal insulation bricks accumulate little heat energy, and the energy saving effect is obvious in the intermittent operation;
3. low impurity content has a very low oxide content such as iron alloy alkali metal, therefore, high refractoriness; higher aluminum content to maintain good performance under reducing atmosphere;
4. mullite insulation bricks have high thermal compressive strength;
5. the appearance of the size is accurate, speed up the masonry, reduce the amount of refractory mud, to ensure the strength and stability of the masonry, thereby extending the life of the lining;
6. mullite insulation brick can be processed into a special shape. To reduce the number of bricks and masonry.
Classification of mullite insulation bricks: Mullite insulation bricks are mainly divided into light and heavy mullite bricks according to their density. They are mainly divided into: 1350, 1450, 1550 mullite bricks according to the temperature of use.
 
What are the uses of mullite insulation bricks?
Mainly used for hot air stove top, blast furnace body and furnace bottom, glass melting furnace regenerator, superstructure brick, upper dome, lame brick, material brick, cover plate, ceramic sintering kiln, petroleum cracking system dead angle lining , metallurgical and other industrial medium temperature furnace lining carbon black reaction furnace quenching section, lining of the stay section. Molded parts, medium temperature carbon black reactors and other thermal equipment linings. Glass furnace upper structure material brick, modified board, processing furnace upper structure, firing kiln, melting kiln, refining device, heating device, thermal insulation layer of thermal equipment.
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