Talk about the use and temperature of common refractory bricks
1. Physical and chemical indicators of high-alumina bricks, product dimensions, allowable deviations, etc., shall comply with the specifications. High-aluminum bricks are used in high-temperature, wear-resistant areas of general furnaces or masonry, burner bricks and special-purpose masonry. The vault of the high temperature zone of the combustion chamber is allowed to use a temperature of 1300 to 1650 °C.
2. The physical and chemical indicators of lightweight clay bricks, the allowable deviation of product dimensions and the cross-section requirements of profile products shall comply with the specifications. Light refractory clay bricks, as kiln linings that are not eroded by high-temperature slag and aggressive gases, are used at temperatures between 1150 and 1400 °C depending on capacity.
3. The physical and chemical indicators of lightweight high-aluminum bricks, the allowable deviation of the external dimensions should comply with the specifications. It is used for heat-resistant linings with working temperature below 1350 °C. It can also be used for masonry without high-temperature melt erosion and erosion. It can be directly in contact with flame.
4. General corundum brick is suitable for the heavy oil and gas furnace with working pressure below 3MPa, the fire lining, the important part of the lining of salty wastewater incinerator, and the radiant burner brick working at high temperature. Generally, the use temperature of corundum bricks is below 1600 to 1670 °C.
5. Low-silicon fused corundum is suitable for the occasion of strong reducing atmosphere, high hydrogen pressure and high-temperature steam. Such as large-scale ammonia plant, gas pipe lining of a one-stage reformer and two-stage reformer lining brick, high-temperature furnace lining. The physical and chemical indicators and dimensional tolerances of low-silicon fused corundum bricks shall comply with the specifications. The low silicon fused corundum is used at temperatures below 1600 ° C to 1670 ° C.
6. Lightweight alumina products (such as lightweight corundum bricks) are used in the heat-resistant and heat-insulating lining of high-temperature furnaces, and the linings of high-temperature and high-pressure steam erosion are generally applied to non-fired surface linings. The use temperature of the alumina product is 1400 ° C or lower.
7. Silicon carbide refractory brick has good thermal conductivity, good thermal stability, resistance to reducing atmosphere, high strength, often used as heat and wear resistant lining, and needs good thermal stability, thermal conductivity and resistance to reduction. The occasion of a sexual atmosphere. The silicon carbide refractory product is used at a temperature of 1400 to 1600 ° C or lower.
