High alumina ceramic balls are spherical ceramic products made of industrial alumina and refractory kaolin as the main raw materials, through scientific formulation, molding and high-temperature calcination. According to the different alumina content, high alumina balls can be divided into different specifications, the common ones are 90%, 92%, 99% and so on. The higher the alumina content, the whiter the color of the product and the better the performance.
From the appearance, the surface of the ceramic ball is smooth, round and uniform in color. Its internal structure is dense, with high strength, high hardness, high temperature resistance, corrosion resistance and other characteristics. The crystal structure of it is regular, and the particles are tightly bound, which gives it good physical and chemical stability. In addition, the specifications of them are diverse, and the particle size ranges from a few millimeters to tens of millimeters, which can meet the needs of different industrial application scenarios.
Thermal Storage Principle
The thermal storage process of ceramic balls is based on the principle of sensible heat storage. Its internal structure is dense, with high specific heat capacity and thermal conductivity. When high-temperature fluid (such as hot flue gas, steam) flows through the high-aluminum porcelain ball bed, the heat is quickly transferred to the ceramic balls, causing their temperature to rise and store a large amount of heat energy; when low-temperature fluid passes through, they can release the stored heat, heat the low-temperature fluid, and realize the recycling of heat. In addition, the regular stacking structure of high aluminum balls can effectively increase the contact area between the fluid and the ceramic balls, enhance the heat exchange efficiency, and ensure the high efficiency and stability of the heat storage-heat release process.
Advantages of High Alumina Ceramic Balls
High temperature resistance and long life：It can withstand high temperatures above 1200℃, and remain structurally stable during repeated thermal cycles, and are not prone to breakage, deformation or powdering. Its service life is as long as 5-8 years, which significantly reduces the maintenance and replacement costs of thermal storage equipment, and is especially suitable for thermal storage systems in high-temperature industrial fields such as steel and ceramics.
High Thermal Storage Density：The high specific heat capacity and high density characteristics of high alumina balls make it have a large heat storage capacity per unit volume. Compared with ordinary them, high porcelain ball of the same volume can store 15% – 20% more heat, effectively reducing the volume of the heat storage device and reducing the equipment investment cost.
Excellent Thermal Shock Resistance：Under rapid temperature changes, high alumina ceramic ball can resist thermal stress shock and avoid cracking damage due to their low expansion coefficient and uniform microstructure. This feature ensures that the thermal storage system can still operate stably during frequent start-stop processes and improve energy utilization efficiency.
Strong Chemical Stability：High-aluminum balls have good tolerance to chemical substances such as acids and alkalis. They are not easy to react with corrosive components in fluids under high temperature environments and will not pollute the heat storage medium. They are suitable for treating industrial waste gas containing complex components such as sulfides and nitrogen oxides, ensuring the safety and environmental protection of the heat storage process.
Thermal Storage Application of High Alumina Ceramic Balls
High-aluminum ceramic balls have become the core material for thermal storage due to their high mechanical strength, long life and stable chemical properties. They are widely used in the steel industry, chemical industry, and environmental protection industry, such as thermal storage heating furnaces, industrial kiln heat recovery, regional heating and new energy consumption, providing important support for sustainable energy systems.
