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Physical and chemical properties of mullite insulation brick
Date:2020-02-28 14:33 | From:Zhengzhou Sunrise Refractory | Author:admin
The mullite light brick is a new type of high-quality thermal insulation refractory material containing AL2O350% ~ 85%, with mullite as the main crystal phase and the combined phase. Because mullite has excellent high temperature mechanical properties and chemical stability, mullite light bricks have high temperature structural strength, low temperature creep rate, low thermal expansion coefficient, strong chemical resistance and good thermal shock resistance. Excellent performance, can be used as the lining of the working surface of the kiln directly in contact with the flame, which can significantly improve the energy saving effect of the kiln. Features of mullite insulation brick:
1. Low thermal conductivity, with good thermal insulation effect;
2. Low thermal melting, due to low thermal conductivity, mullite series of light thermal insulation bricks accumulate very little heat energy and operate intermittently Medium energy saving effect is obvious;
3. Low impurity content and very low iron box alkali metal and other oxide content, therefore, high fire resistance; high aluminum content makes it maintain good performance in reducing atmosphere;
4. Heat High compressive strength;
5. Accurate appearance dimensions, speed up the masonry, reduce the use of refractory mud, ensure the strength and stability of the masonry, thereby extending the life of the lining; 6. Can be processed into special shapes to reduce Number of bricks and masonry.
Because mullite has excellent high temperature mechanical properties and chemical stability. Therefore, mullite thermal insulation refractory bricks have excellent properties such as high temperature structural strength, low high temperature creep rate, small thermal expansion coefficient, strong chemical resistance, and good thermal shock resistance. Face lining can effectively reduce the weight of the furnace body and save energy.
2. Low thermal melting, due to low thermal conductivity, mullite series of light thermal insulation bricks accumulate very little heat energy and operate intermittently Medium energy saving effect is obvious;
3. Low impurity content and very low iron box alkali metal and other oxide content, therefore, high fire resistance; high aluminum content makes it maintain good performance in reducing atmosphere;
4. Heat High compressive strength;
5. Accurate appearance dimensions, speed up the masonry, reduce the use of refractory mud, ensure the strength and stability of the masonry, thereby extending the life of the lining; 6. Can be processed into special shapes to reduce Number of bricks and masonry.
Because mullite has excellent high temperature mechanical properties and chemical stability. Therefore, mullite thermal insulation refractory bricks have excellent properties such as high temperature structural strength, low high temperature creep rate, small thermal expansion coefficient, strong chemical resistance, and good thermal shock resistance. Face lining can effectively reduce the weight of the furnace body and save energy.