Silica-mullite bricks are a new type of high-efficiency refractory material with high refractoriness, good thermal shock resistance and chemical erosion resistance, and are widely used in many high-temperature industrial fields. The following are the main application fields and specific uses of silica mullite bricks:
I. Steel industry
Silica-mullite bricks are widely used in blast furnace linings, ladles, tapholes, hot blast furnaces, furnace tops, furnace bodies and other parts in the steel industry. Due to its high strength and compressive strength, silica mullite bricks can maintain structural stability at high temperatures and resist the erosion of acidic or alkaline slag, thereby extending the service life of equipment such as blast furnaces.
II. Cement industry
In the cement industry, silica-mullite bricks are mainly used in the secondary firing zone, transition zone, cooling zone and other parts of cement rotary kilns. Silica-mullite bricks can withstand high temperatures and friction of materials in the kiln, and have good resistance to chemical erosion, especially excellent alkali erosion resistance. In addition, Silica-mullite bricks can resist temperature fluctuations and mechanical stress, reduce cracks or spalling caused by thermal stress, and thus improve the working efficiency and stability of cement rotary kilns.
3. Glass Industry
Silica-mullite bricks also play an important role in the glass industry. They are often used in the partition walls of the kiln regenerator and the inner lining of the furnace to resist the chemical erosion of molten glass and high-temperature gas. Silicon-molybdenum bricks have high chemical stability, which can prevent the contamination of molten glass. At the same time, they are not easy to deform and peel off at high temperatures, which prolongs the service life of the kiln.
4. Ceramic Industry
In the ceramic industry, Silica-mullite bricks are mainly used in the kiln lining and combustion chamber insulation of ceramic tunnel kilns, as well as high-temperature working environments such as roller kilns. Silica-mullite bricks have excellent thermal shock stability, can prevent cracking or falling off, and have good high-temperature tolerance, which is suitable for high-temperature firing environments of ceramics.
5. Power Industry
Silica-mullite bricks are also widely used in the power industry, especially in the linings, chimneys and heat exchangers of power plants and boilers. Silica-mullite bricks can resist the erosion of high-temperature flue gas and ash, have good wear resistance, and strong thermal shock resistance, thereby ensuring the normal operation and safety of power equipment.
6. Chemical Industry
In the chemical industry, Silica-mullite bricks are suitable for high-temperature equipment in chemical reaction environments, such as gasifiers and incinerators, because of their good high-temperature tolerance and corrosion resistance. Silica-molybdenum bricks are resistant to acid, alkali and oxide corrosion, and are suitable for high-temperature conditions in harsh chemical environments.
7. Other fields
In addition, silica-molybdenum bricks are also used in lime rotary kiln linings, particle steel rotary kilns, magnesite incinerators, sintered mullite rotary kilns and other fields, and also show excellent refractory properties, thermal shock resistance and chemical stability.
Silica-mullite bricks play an important role in many high-temperature industrial fields with their unique performance advantages. However, the specific working environment and requirements in different fields are different, so when choosing silica-mullite bricks, comprehensive considerations need to be made based on actual conditions. At the same time, correct installation and maintenance are also crucial to ensure the performance of silica-mullite bricks and extend their service life.
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