High-alumina refractory balls are made primarily from industrial alumina and refractory kaolin, through scientific formulation, shaping, and high-temperature firing. Refractory ceramic balls, also known as heat storage balls, are produced using the same primary materials—industrial alumina and refractory kaolin—combined with scientific formulation, shaping, and high-temperature firing. The properties of high-alumina refractory balls include: 1. Description: Heat storage balls, also known as spherical heat storage bodies, are characterized by good thermal shock resistance, high heat storage capacity, high strength, ease of cleaning, and reusability.