Pop Float BallsIt is a fly ash hollow sphere that floats on water, with a grayish-white color, thin-walled and hollow, and extremely light in weight. Its bulk density is720kg/m3Heavy-duty418.8kg/m3(Lightweight), particle size approximately0.1Millimeters, surface sealed and smooth, low thermal conductivity, melting point ≥1610°C, is an excellent thermal insulation and refractory material, widely used in the production of lightweight casting materials and in the field of oil drilling. The main chemical components of expanded perlite are silicon dioxide and aluminum oxide, featuring fine particles, hollow structure, light weight, high strength, wear resistance, high-temperature resistance, thermal insulation, and flame-retardant insulation. It is one of the raw materials extensively used in the refractory industry.