As the iron and steel industry pays more and more attention to energy saving and consumption reduction, refractory raw materials and materials are developing in the direction of light weight and low thermal conductivity, so the upgraded product of "sintered fused alumina"-energy-saving lightweight microporous corundum is horizontal born.
Microporous corundum is made of industrial alumina, aluminum hydroxide and α-Al2O3 micropowder as the main raw materials, adding appropriate admixtures, and firing in a high-temperature shaft kiln. The product has low apparent porosity, high strength, and thermal shock resistance. Good, high refractoriness and so on. Compared with ordinary sintered fused alumina, under the premise that the strength and corrosion resistance are basically the same, by improving the internal closed micropores, reducing the thermal conductivity and structural thermal stress of the material, the thermal insulation performance and thermal shock resistance of the material are improved. It can be used to partially or completely replace ordinary sintered fused alumina in refractory products such as ladle wall and bottom castables, prefabricated parts, and seat bricks, and the strength and corrosion resistance of refractory products produced by using microporous corundum will not decrease, and will also It has better thermal shock resistance, low thermal conductivity, and energy-saving and thermal insulation properties.
Although microporous corundum can replace sintered fused alumina in theory, it is still very difficult for companies accustomed to using sintered fused alumina to choose high-priced new microporous corundum under the downturn in the refractory industry chain market. , it is impossible for microporous corundum to completely replace sintered fused alumina, and the market position of sintered fused alumina cannot be shaken. However, enterprises can face it calmly, and must not reject microporous corundum products, and do not blindly launch microporous corundum projects. After all Lightweight development is the current trend of material development.
