Yixing Dingshan Refractory Material's new generation of products, Columnar Mullite Wear-resistant bricks used in cooling zone of large CDQ furnace. Through the practical verification of several engineering projects, the service life of our newly developed Columnar Mullite Wear-resistant bricks can reach 8 years in a single maintenance, which greatly saves the cost for customers, improves the production efficiency and improves the production environment. Therefore, our company has become a member of the refractory series of the new generation of environment-friendly and efficient CDQ refractory products.