The cement industry in the building materials industry, glass industry, ceramic industry, all the high-temperature furnace lining refractory to construct. Although the iron and steel industry is smaller than the number of consumption, but the refractory certain performance requirements are very stringent, especially with the modern requirements to improve the combustion intensity of heat transfer enhancement effect, reducing heat loss Environmentally, making refractories not only is the building materials industry consumable materials, new technologies, new processes necessary materials.
Pyrometallurgical non-ferrous metals and their thermal processing is also inseparable from refractory materials. A wide range of non-ferrous metals, smelting different ways. Melt melting temperature, good fluidity, large amount of slag, refractory specific requirements, refractories consumption for about 8% of the total amount. Since the 1980s, non-ferrous metals industry rapid development of the flash smelting, oxygen-enriched blowing and flash roasting and other new technologies, the increasingly demanding requirements of refractory performance, especially in key parts of the furnace requires more stringent. In addition to the use of clay brick, silica brick, high alumina brick, high strength monolithic refractories and refractory fiber products, carbonaceous, silicon carbide products directly bonded magnesia-chrome brick and cast magnesium-chrome brick, have adopted.
Refractory materials and other materials of the type in its role in the destruction at high temperatures to withstand thermal, chemical and mechanical factors, must have a lot of properties in order to ensure the durability and safety. Mainly used as a high temperature furnace, high temperature vessel lining, components and functional materials, refractory materials should have the following basic requirements:
1) high temperature. At high temperatures (such as steelmaking temperature up to 1750? C) does not soften, melt;
2) high strength. Able to withstand the to build load items and the stress acting during operation at high temperatures without loss of structural strength, and does not deform and collapse.
3) thermal shock resistance. Withstand drastic temperature changes and heat the uneven generated damaging effects.
4) the volume stability. Volume stability at high temperature, the masonry crack does not occur due to excessive expansion or contraction.
