Alumina hollow spheres and their products are lightweight refractories with excellent high temperature and energy saving, and are very stable in various atmospheres. Especially applied on high temperature kiln at 1800 °C. Hollow balls can be used for high temperature, ultra high temperature insulation fillers, high temperature refractory concrete lightweight aggregates, high temperature castables, etc. Hollow ball bricks can be used for high temperature energy saving (>30%) downdraft kiln, shuttle kiln, molybdenum wire furnace, tungsten rod furnace, induction furnace, nitriding furnace, etc. It will achieve obvious results in reducing the weight of the furnace, transforming the structure, saving materials and saving energy.
Haoyang alumina hollow ball brick [1] is made of alumina hollow sphere, corundum powder, calcined powder, etc., which is homogenized, formed and sintered at high temperature.
The product has the characteristics of high temperature resistance, acid and alkali corrosion resistance, low thermal conductivity, good thermal insulation performance and small bulk density. It is mainly used for working lining and heat insulation of various high temperature kiln furnaces such as ceramics, electric porcelain, grinding wheels and refractory materials. lining.
Alumina hollow sphere alumina hollow sphere is a new type of high temperature insulation material. It is made by melting industrial aluminum oxide in an electric furnace. The crystal form is a-Al2O3 microcrystal.
The alumina hollow sphere is the main body, and can be made into various shapes. The maximum use temperature is 1800 ° C, the mechanical strength of the product is high, several times that of the general lightweight product, and the bulk density is only one-half of the corundum product.
It has been widely used in high-temperature and ultra-high temperature furnaces such as petrochemical industrial gasifiers, carbon black industrial reactors, metallurgical industrial induction furnaces, etc., and has achieved very satisfactory energy-saving effects.
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