With the widespread development of sponge city projects across the country, the use of industrial permeable bricks has increased dramatically. My country produces a large amount of refractory waste and pollutes the environment seriously. Waste refractory insulation bricks are used as the main raw materials, and a small amount of auxiliary raw materials are added to prepare sponge urban permeable bricks through forming and sintering processes. Through performance tests, such as porosity, flexural strength, and water permeability coefficient, the effect of process parameters on the performance of permeable bricks is studied, the process parameters of using refractory waste are comprehensively optimized to prepare sponge urban permeable bricks, and permeable bricks are prepared for the industrialization of high-quality industrial solid waste. Brick provides reference. Through the experimental results and analysis, the following conclusions are drawn: the raw material ratio of refractory brick waste: binder: foaming agent: sintering aid is 80:10:1:9. Slurry water mill foaming occurs when the water to material ratio is 0.5, the ball milling speed is 80 r/min, and the ball milling time is 2 h; the foaming effect and molding performance are better. In the drying stage, drying at 45 ^oC for 12 h has the best molding effect. The sintering system at 1,300 ^oC and holding time of 1 h has the best sintering performance. After optimizing the process, the porosity of the permeable bricks can reach 48.4%, the water permeability coefficient is 2.1×10^-2 cm/s, the national permeable brick has A-level standard, and the compressive strength is 26.8 MPa

Keywords: Refractory wastes; sponge city; permeable brick; process parameters; permeability coefficient