Zero Expansion High Purity Silica Bricks for Quick Repair

Zero expansion high purity silica bricks for quick repair are new materials for zero expansion silica bricks for glass kilns, coke ovens, and hot repairs.
After local damage to the coke oven, it is often necessary to stop the furnace for repair. Silica bricks have poor thermal stability. The main mineral phases of silica bricks, tridymite and cristobalite, and a small amount of residual quartz, at 200℃~300℃ and 573℃, the volume of the masonry changes due to the crystal transformation of SiO2 variants. In order to prevent the masonry from deformation and cracking, the temperature should not be lowered too quickly when the furnace is shut down, otherwise it will affect the service life of the silica brick masonry. The coke oven also requires slow heating when baking, and the baking time is more than 80 days. Cold repair of coke ovens is difficult, time-consuming and costly, so many coke ovens are forced to stop using after the combustion chamber is damaged. In order to meet the development needs of hot repair of coke ovens, our company has developed zero-expansion silica bricks with good performance, which solves the problem of poor thermal stability of ordinary silica bricks, can meet the requirements of rapid heating, and can be used after the furnace is completed without long-term baking.