Low Creep high alumina brick for hot blast stove

Low Creep high alumina brick for hot blast stove

Low creep high alumina brick is a kind of high-alumina refractory brick. Because of its low creep rate, it is also called low creep high alumina brick. Today we will understand the characteristics and uses of low creep high alumina bricks.

Low creep high alumina bricks are based on the "three stone" theory. Choose bauxite and bound clay as the main raw materials, add appropriate kyanite, andalusite and sillimanite, commonly known as "three stones", control physical and chemical indicators and particle size composition, use bauxite + mullite + corundum and other raw materials as the technology Program. In the production process, the raw material indicators are first tested and controlled. After the crushing, pulverizing and screening processes, the ingredients are prepared according to the proportion. After mixing and grinding, the particle size and moisture of the mud are controlled to meet the molding requirements. Qualified abrasives, control the number of blows, external dimensions and burrs, and at the same time detect semi-finished products and their efficiency meet the specified requirements. Production process: high-temperature calcined special-grade bauxite, added high-temperature material with small creep rate, high-pressure molding and high-temperature sintering

Common high-alumina bricks cannot solve the problem of low creep in a long-term high-temperature working environment, and it is easy to cause accidents during use of the kiln. Therefore, the use of low-creep high-alumina bricks as the lining of the kiln can solve this problem. .

Low creep high alumina bricks are an improvement on the basis of commonly used high-alumina refractory bricks. In the production formula of the original high-alumina bricks, refractory raw materials with low creep rate are added, and the forming and firing are reasonably controlled to make high-alumina bricks. Bricks have a certain low creep rate.

Application of low creep high alumina brick:

Common low-creep high-alumina bricks can be used in blast furnace hot blast stoves, as well as other industrial kilns, and can also be made into low-creep high-alumina bricks of different sizes according to specific construction requirements, such as lattice bricks, special-shaped bricks, anchor bricks, etc. , mainly used in industrial kilns in long-term high temperature environments.

Low creep high alumina bricks have the characteristics of high-alumina bricks and low creep rate due to their high performance. They are the preferred linings for industrial kilns in high temperature environments, ensuring long-term service life of the kilns and avoiding occurrences in use. Accidental collapse accident.

The characteristics of low creep high alumina bricks are:

1. Low creep rate and good volume stability at high temperature. Under the action of constant temperature and constant load, the interior of high-alumina bricks changes slightly with time. The volume is stable under high temperature environment, and the danger of lining falling off is not easy to occur.

2. Good resistance to gas erosion and erosion. In a high temperature environment, the low creep high alumina brick is not only difficult to change in volume, but also has good resistance to gas erosion and long service life.    

3. High compressive strength and good wear resistance. Low creep high alumina bricks can withstand greater gas pressure and resist the impact of dust in the gas.