Refractory Compositions On The Role And Impact Of Petrochemical Industry
Acid refractory materials is mainly composed of silicon dioxide, commonly used silica brick and clay brick. Silica bricks containing silica over 94% of silica products, use silica, silica bricks and other raw materials, the strong acidic slag corrosion resistance, high refractoriness, size will not shrink after repeated burning, or even slightly inflated but its vulnerable to alkali-slag corrosion, thermal shock resistance difference. Silica bricks mainly used in coke ovens, glass melting furnaces, acid furnace Thermal equipment. Clay bricks in refractory clay as raw material, alumina containing 30%~46%, are weakly acidic refractories, good thermal shock resistance, acid slag corrosion resistance, wide range of applications.
Neutral refractory aluminium oxide, chromium oxide or carbon as the main ingredient. Corundum products containing alumina 95% above is a kind of high quality refractory materials use. Whose main ingredient is chromium oxide-chrome bricks for slag corrosion resistance, good, but less thermal shock resistance, high temperature load deformation temperature is low. Carbon refractory brick, graphite and SIC products, its low thermal expansion coefficient and high thermal conductivity, thermal shock performance, high temperature strength, resistance to acid, alkali and salt corrosion, particularly weak alkali has a better ability to withstand, without wetting of the metal and slag, light. Widely used as high temperature and lining materials, also used in petroleum, chemical autoclave lining, promotes the development of petrochemical industry.