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zircon brick is a refractory brick which is made of natural zircon sand. Zircon brick is made through sintering by single zircon, and zircon brick can as well be made by adding proper sintering agent into zircon which is as the main raw material. Zircon brick belongs to acid refractory with the properties of strong resistance to slag, lower thermal expansion ratio which will decrease with the temperature increase, high refractoriness under load, high wear resistance and good thermal shock resistance.

During the using process, zircon brick with high refractoriness is not easy to dissolve when it is by chemical corrosion of slag, however, the slag may invase the internal of the brick through air hole and reacts with the decomposed zircon particle, form metamorphic layer and make the brick broken. In order to improve the using effect, slag permeability must be decreased. In actual production, when reducing the porosity of zircon brick, high bauxite or fused alumina can be added into raw material of zircon brick to improve the permeability resistance of zircon brick.

Zircon brick is suitable for working under pressure with its good thermal shock resistance. In metallurgical industry, zircon brick is widely used in ladle lining, casting export, high temperature induction furnace lining and so on. With the strong resistance to acid slag and glass liquid, in glass industry, zircon brick is applied to severely damaged parts of glass furnace. In addition, crucible, pipe, boat, dish and test container made by zircon brick are widely used in place related to high temperature. Zircon brick with high density and low porosity is suitable to the liner of glass furnace of glass fiber.