Zircon brick is a refractory brick which is made by natural zirconite and through sintering method. During the production process, not only zirconite is used as the main raw material, while appropriate sintering agent (the most commonly used is refractory clay) is added into the raw material. In order to improve the property of zircon brick, other components are added into the material such as bauxite, corundum or chromium oxide.