Mullite insulation bricks are high alumina refractory materials with mullite (3Al2O3·2SiO2) as the main crystal phase. 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 in the lower alumina content, and a small amount of corundum in the higher alumina content.

Features

1. Low thermal conductivity, good thermal insulation effect;

2. Low thermal fusion, due to the low thermal conductivity, the mullite series light insulation bricks accumulate little heat energy, and the energy saving effect is obvious in intermittent operation;

3. The low impurity content has a very low content of oxides such as alkali metal in the iron box, so the refractoriness is high; the high aluminum content makes it maintain good performance under a reducing atmosphere;

4. High compressive strength in hot state;

5. Accurate appearance and size, speed up the masonry speed, reduce the amount of refractory mud, ensure the strength and stability of the masonry, and thereby extend the life of the lining;

6. Can be processed into special shapes to reduce the number of bricks and the joints.

Advantages:

1. Economical: Mullite insulation bricks can reduce the cost of foundation, reduce the cross section of the frame, and save the reinforced concrete can significantly save the comprehensive cost of the building. Design and use Lightweight bricks can reduce the overall cost by more than 5% than solid clay bricks.

2. Practicability: The use of lightweight bricks can increase the area of use. At the same time, due to the thermal insulation of aerated concrete, the thermal insulation effect is good. In hot summer, the indoor temperature is 2-3°C lower than that of solid clay bricks. Power consumption.

3. Construction: Lightweight bricks have good machinability, and the construction is convenient and simple. Due to the large size and light weight, it can reduce labor intensity, improve construction efficiency, and shorten the construction period.

Application

Mullite insulation bricks can be directly used in the lining of high-temperature kilns. At present, they have been widely used in the lining of shuttle kilns, roller kilns, glass and petrochemical kilns.

Physical And Chemical Indicators