Mullite and its composite refractories have been widely used in many industries due to their excellent refractory performance, high temperature strength, thermal shock resistance and chemical stability. The following are the specific applications of mullite and its composite refractories in different industries:
Metallurgical industry
In the metallurgical industry, mullite and its composite refractories are widely used in the lining and refractory components of high-temperature equipment such as blast furnaces, hot blast furnaces, and heating furnaces. Especially in the key parts such as the hot air duct suspension and orifice of the hot blast furnace, the vertical pipe of the pipe and the straight pipe with higher temperature, mullite bricks have become an ideal choice due to their good thermal shock resistance and acid slag erosion resistance. In addition, mullite is also used in the parts of torpedo tank cars that are impacted by molten iron and the slag line area to improve the durability and safety of the equipment.
Ceramic industry
In the ceramic industry, mullite and its composite refractories are mainly used to make kiln furniture, such as saggers, shelf plates, push plates, etc. These kiln furniture play the role of spacing, supporting, cushioning and protection during the firing process of ceramic products. Mullite refractory materials have good mechanical properties and thermal shock resistance, and can withstand multiple cycles from room temperature to high temperature to ensure the firing quality of ceramic products. At the same time, mullite-corundum composite refractory materials are particularly suitable for the firing of soft magnetic materials and electrical insulating ceramics due to their excellent high-temperature strength and chemical stability.
Glass industry
In the glass industry, mullite bricks are used in key parts such as the main material channel, heat storage chamber and clarifier wall of glass kilns. These parts need to withstand the erosion of high temperature and corrosive gases, and mullite bricks can effectively protect the kiln structure and extend its service life with their good refractory properties and erosion resistance.
Cement and lime industry
In the cement and lime industry, mullite bricks are used for the lining of rotary kilns. Rotary kilns are key equipment in the production process of cement and lime, and their linings need to withstand high temperatures and friction erosion of materials. Mullite bricks are an ideal choice for rotary kiln linings due to their good wear resistance, high-temperature strength and thermal shock resistance.
New energy industry
With the rapid development of the new energy industry, the application of mullite and its composite refractory materials in the field of new energy is becoming more and more extensive. For example, in the firing process of lithium battery positive electrode materials, kiln tools with excellent corrosion resistance and thermal shock resistance are required. Mullite has become an important raw material for the preparation of such kiln tools due to its strong resistance to Li and Co ion corrosion.
Military and aerospace industries
In recent years, mullite and its composite refractory materials have also been gradually applied to the military and aerospace fields. These fields have extremely high performance requirements for materials, requiring materials to have extremely high high temperature resistance, thermal shock resistance and chemical stability. Mullite and its composite refractory materials have received extensive attention and application in the military and aerospace fields due to their excellent performance.
In summary, mullite and its composite refractory materials are widely used in many industries such as metallurgy, ceramics, glass, cement and lime, new energy, military and aerospace. With the continuous advancement of technology and the continuous development of industry, the application field of mullite and its composite refractory materials will be further expanded.
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