Low creep refractory bricks are an important type of refractory materials that are widely used in high temperature industries such as metallurgy, cement, glass, and ceramics. These bricks are characterized by their low creep rate at high temperatures, excellent thermal shock resistance, and high compressive strength. In this article, we will discuss the classification, technical parameters, and production technology of low creep refractory bricks.
Low creep refractory bricks are usually classified into different grades or levels based on their chemical composition and application. The most common classifications are:
1. Silica series: These bricks are made of high-purity silica with a SiO2 content of more than 95%. They are resistant to acid and have excellent thermal stability.
2. Mullite series: These bricks are made of high-alumina bauxite and mullite powder. They have good thermal shock resistance and high strength.
3. Corundum series: These bricks are made of high-purity corundum and have excellent resistance to abrasion, erosion, and oxidation.
The technical parameters of low creep refractory bricks are critical to their performance. The main technical parameters include:
1. Creep rate: This is the measure of the deformation of the brick under high-temperature load. The lower the creep rate, the better the performance of the brick.
2. Modulus of rupture: This is the measure of the maximum stress that the brick can sustain before fracturing. Higher modulus of rupture indicates better strength.
3. Thermal conductivity: This is the measure of the amount of heat the brick can conduct. Low thermal conductivity is desirable for refractory materials.
The production technology of low creep refractory bricks is complex and mainly involves the following processes:
1. Raw material preparation: The raw materials are carefully selected and mixed in the appropriate proportions to obtain the desired chemical composition and properties.
2. Forming: The mixed powders are pressed into the desired shape by using a press or molding machine.
3. Drying: The formed bricks are dried in a drying chamber.
4. Firing: The dried bricks are fired in a high-temperature kiln to obtain the desired physical and chemical properties.
In conclusion, the low creep refractory brick industry plays a critical role in high-temperature industries. The classification, technical parameters, and production technology of these bricks are essential for ensuring their performance. With the development of high-temperature industries, the demand for low creep refractory bricks is expected to rise, and the industry will continue to evolve and innovate to meet the changing needs of the market.
