How to Improve the Service Life of Refractories for Aluminum Melting Furnace

      From the aspect of material design, adding components that can effectively limit penetration to the ingredients, such as graphite, SiC, Si₂ON, Si₃N₄, B₄C, BN, 9Al₂O₃·2B₂O₃ and Al₂O₃·TiO₂, etc., can greatly improve the refractory material’s resistance to crust peeling. performance.

      Composite corundum refractory materials (products) with better performance can be obtained by optimizing the corundum refractory particles, adding appropriate amount of non-oxide, selecting high-quality binder, and adopting high-pressure forming. When these high-performance composite corundum products are used in melting furnaces, they can limit the penetration of molten aluminum, reduce structural spalling and damage, and increase the service life of refractory materials.

      By optimizing the particle distribution of refractory materials and the application of micropowder, the production of refractory materials with an average pore size of no more than 0.5 μm (not exceeding the critical pore diameter of molten aluminum penetration) and low air permeability can limit the penetration of molten aluminum.

      According to the melted products and operating conditions, it is considered that SiO₂-Al₂O₃ refractory materials can be used as lining refractories for melting furnaces. Considering that the alloying elements of metal aluminum and aluminum alloy have a strong reduction ability to SiO₂, SiO₂-Al₂O₃ refractory materials with high Al₂O₃ content (such as bauxite refractory materials and corundum refractory materials) should be selected. In terms of organizational structure, a high-alumina refractory material with low air permeability and a pore diameter of less than 0.5 μm should be manufactured, that is, it can adapt to the use conditions of the melting furnace.

      The high-aluminum refractory castable produced by ZHENJIN REFRACTORIES adopts modern ultra-fine powder and low CA cement addition technology, which improves the medium-temperature strength and high-temperature stability. The dense microstructure ensures the stability of the overall lining. The service life of high aluminum refractory castables is 2-3 times that of traditional castables, and it has the characteristics of high density, high strength and low wear.