The firing process of zircon bricks is similar to that of general refractory insulation materials. The firing temperature ranges from 1500 to 1700 ℃, and the zircon bricks begin to collapse at 1300 to 1400 ℃. At the beginning of calcination, the collapse is strong at 1400 to 1500 ℃, but after 1600 ℃, the collapse is not significant, and the calcination stops. Therefore, during firing, the temperature should be slowly raised from 1300 to 1500 ℃, and the firing temperature can be set around 1600 ℃. If the residual water content is low or the amount of mineralization used is small, the firing temperature can be increased by 1650 to 1700 ℃.
Many objects can be modified based on heat treatment. If low grade zircon is heated to a certain level, it will become colorless and fully transparent crystals. It is widely used in Laminated glass melting tank, heat storage tank, ceramic frit kiln and chemical plant furnace lining and other equipment. For example, in Sri Lanka, zircons are often found in the green tone, but after heat treatment, the color tone becomes lighter and becomes higher. It is suitable to use zircon sand as the key raw material, combined with performance micro powder, and fired in a high-temperature shuttle kiln based on mixing, drying, and forming.
New zircon brick Generally, zircon brick is made of pure natural quartz sand with a particle size distribution of about 0. smm. The new bricks produced today need to add a certain amount of coarse particle zircon sand with a particle size distribution of smm. This sand was prepared using equal negative pressure and calcination methods. Its characteristic is a well-proportioned organizational structure, with a larger embryo material weighing up to 1 ton, and even if it has never been calcined, it can contain adhesives.
