Light high-strength foundry waste sand and waste ash ceramsite and preparation method thereof

The invention relates to the technical field of solid waste resource utilization, and particularly provides a light high-strength foundry waste sand and waste ash ceramsite. The light high-strength foundry waste sand and waste ash ceramsite is prepared from, by mass, 10-30% of waste sands, 60-80% of waste ash, 5-15% of stearic acid and 2-4% of borax. According to the light high-strength foundry waste sand and waste ash ceramsite, foundry waste sand and waste ash are adopted as main raw materials, solid waste is recycled, energy conservation and environmental protection are achieved, the prepared ceramsite is small in density and high in strength, and the ceramsite is expected to be widely applied to the aspects of novel building materials, water pollution treatment, oil exploitation, catalyst carriers, adsorption, soilless culture and the like. The preparation method of the light high-strength foundry waste sand and waste ash ceramsite adopts rolling granulation and low-temperature sintering, has the advantag