1. What are refractory materials?
Refractory materials refer to materials that can withstand high temperature and high pressure, and maintain their physical and chemical properties stable under high temperature conditions.
2. What are the main types of refractory materials?
Acidic refractory materials: such as silica bricks, the main component is silicon dioxide.
Neutral refractory materials: such as aluminum bricks and magnesia aluminum bricks, the main components are aluminum oxide and magnesia aluminum spinel.
Basic refractory materials: such as magnesia bricks, the main component is magnesium oxide.
Special refractory materials: such as silicon carbide and silicon nitride materials, which have special properties.
3. What are the main performance indicators of refractory materials?
Refractoriness: the ability of a material to resist high temperature without melting.
Load softening temperature: the temperature at which a material begins to soften under the combined action of high temperature and load.
Thermal shock resistance: the ability of a material to resist rapid temperature changes without cracking.
Erosion resistance: the ability of a material to resist erosion by slag, melt, gas, etc. at high temperatures.
High temperature strength: the ability of a material to maintain mechanical strength at high temperatures.
4. What are the application areas of refractory materials?
Metallurgical industry: such as blast furnace lining, converter, open hearth furnace, electric furnace, etc.
Glass industry: such as glass kiln lining, molten pool, etc.
Cement industry: such as rotary kiln, preheater, cooler, etc.
Ceramic industry: such as firing kiln, dryer, etc.
5. How to extend the service life of refractory materials?
Choose the right material: select the corresponding refractory material according to the specific working conditions.
Correct construction method: ensure the construction quality of refractory materials, such as masonry technology, the use of binders, etc.
Reasonable maintenance and overhaul: regularly inspect and maintain refractory materials, and repair damaged parts in time.
Control process parameters: minimize temperature fluctuations and chemical erosion, and control process parameters such as atmosphere.
6. How to deal with discarded refractory materials?
Recycling and reuse: After the waste refractory materials are processed by crushing, screening and other processes, they are used again in production.
Landfill treatment: For waste refractory materials that cannot be recycled, they can be landfilled.
Comprehensive utilization: Some waste refractory materials can be used in other fields such as building materials.
7. What is high alumina brick?
High alumina brick is a refractory brick with a high aluminum content, and its main component is alumina (Al₂O₃). High alumina brick has high refractoriness and good thermal shock resistance, and is widely used in high-temperature industries such as metallurgy, glass, and cement.
8. What is silicon carbide refractory material?
Silicon carbide refractory material is a special refractory material with silicon carbide (SiC) as the main component. It has high hardness, high thermal conductivity, good thermal shock resistance and chemical corrosion resistance, and is often used in high-temperature kilns, metallurgical furnaces, chemical equipment, etc.
