There are two kinds of high alumina refractory bricks. One is that there are 55 high-alumina bricks, 65 high-alumina bricks and 75 high-alumina bricks because of the aluminum content. Because of its properties, it can be divided into ordinary high-alumina brick, low-creep high-alumina brick, high-load soft high-alumina brick, anti-peeling high-alumina brick, micro-expansion high-alumina brick and so on. These are ordinary high alumina bricks.
Different high-alumina bricks have different application ranges. Let's briefly introduce the high-alumina bricks commonly used in kilns:
1、
The aluminum content of ordinary high-alumina bricks used in industrial kilns is 55-75. Ordinary high alumina bricks have a series of better fire resistance than clay bricks. They are a kind of refractory bricks with good application effect and are widely used in various hot kilns, such as hot metal ladle, hot blast stove, electric furnace, rotary kiln and so on.
2. High alumina bricks for blast furnace are refractory bricks with relatively low porosity.
3. Low creep high alumina brick for hot blast stove. According to the service temperature of the hot blast stove, when making low creep high alumina bricks, three stone minerals are added to the aggregate to make the matrix composition close to or completely composed of mullite. Due to the presence of mullite in the matrix, the content of mullite in the material will increase and the content of glass phase will decrease. The excellent mechanical and thermal properties of mullite are beneficial to improve the high temperature properties of the material. In order to make the matrix completely mullite, controlling Al2O3/SiO2 is the key. Low creep high alumina bricks are widely used in hot blast stoves and other hot furnaces.
The above is a brief introduction of common high-alumina refractory bricks in ironmaking industrial furnaces. High alumina brick has excellent performance and can meet the needs of some industrial furnaces. The application of high-alumina brick also designs the performance index of high-alumina brick according to the requirements of customers. Ruiwo refractory bricks provide ordinary refractory bricks such as high alumina bricks and clay bricks for industrial furnaces of major ironmaking and steelmaking plants all the year round. For more information about refractory bricks, please consult the technical staff of Ruiwo, and look forward to your communication and cooperation.
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