Populated珠It is a floating fly ash hollow sphere, grayish white in color, with thin walls and a hollow structure, and it is extremely light in weight, with a bulk density of720kg/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 castables and in oil drilling. The chemical composition of expanded perlite mainly includes 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.