Principle of production of burn-free bricks: Fly ash, coal gangue, slag and other industrial waste residues contain high amounts of silicon oxide, alumina, and iron oxide. After the raw materials are mixed and rolled, they are fully hydrated to form silicon and aluminum. Type vitreous body, this vitreous body combines with the hydrated calcium oxide to produce a chemical reaction, which is called "pozzolanic reaction". The chemical equation is as follows: Hydration active substance water hydrated calcium silicate (aluminum) hydration in the chemical reaction Calcium silicate (aluminate) is a kind of colloidal glass body. This colloidal glass body is not stable, but under the action of additives, it gradually solidifies over time and forms a high-strength network structure. In addition, the raw materials are properly blended. And maintenance, thus forming the strength of self-curing bricks.