GB/T 17105-1997 is the classification standard for dense and shaped refractory products. It classifies dense and shaped refractory products in detail according to the chemical and mineral composition of the products (such as silica, mg, etc.), combined with key performance indicators such as bulk density and room temperature compressive strength. Clearly define the characteristic range of each category of products, provide a clear basis for the production enterprise to control the mass and the rational selection of the user unit, and help the high temperature industrial field to accurately select suitable refractory products to ensure the efficient and safe operation of industrial kilns and other facilities.