Study on Preparation and Properties of Steel Slag-Shale Slag Foamed Ceramics Material

This is a paper in the field of ceramics and composites. High-temperature foaming method has been successfully applied to prepare foamed ceramics material by using steel slag and shale slag as the main raw materials. Silicon carbide and borax were used as the foaming agent and fluxing agent, respectively. This paper focused on the influence of steel slag content, SiC addition, borax addition and foaming temperature on the pore structure and properties of foamed ceramics. The experimental results showed that when the steel slag content is 20%, the shale slag is 80%, SiC of 0.5% and borax of 4% are additionally added, the foaming temperature is 1090 ℃ and the holding time is 40 min, the foamed ceramics material has the best properties. Under optimal conditions, the bulk density, compressive strength and thermal conductivity of the foamed ceramics are 0.468 g/cm³, 3.265 MPa and 0.121 W/(m·K), which meets the property requirements of building insulation materials. The main crystal phases are augite phase, quartz phase and diopside phase．