Refractory Bubble Alumina Balls

Refractory bubble alumina balls are a new type of high-temperature insulation material. Refractory bubble alumina balls are made of industrial alumina as raw material and are melted and blown in an electric furnace. Alumina hollow balls can be used as high-temperature and ultra-high-temperature insulation fillers.

What are alumina balls?

Alumina hollow balls and their products are lightweight refractory materials that are high temperature resistant, energy-saving, environmentally friendly, and very stable in various environments. Alumina balls have obvious thermal insulation properties and low thermal conductivity, which can have a good thermal insulation effect, reduce heat dissipation, and improve thermal efficiency, thereby saving energy. The energy-saving effect can reach more than 30%. It is especially suitable for use in high-temperature furnaces of 1800℃.

Application of high-purity alumina balls

High-purity alumina balls can be used as high-temperature and ultra-high-temperature insulation fillers, high-temperature refractory concrete lightweight aggregates, high-temperature castables, refractory bricks, etc. High-purity alumina balls are widely used in high-temperature and ultra-high-temperature kilns, shuttle kilns, molybdenum wire furnaces, tungsten rod furnaces, induction furnaces, and nitriding furnaces such as gasifiers in the petrochemical industry, carbon black industrial reactors, and induction furnaces in the metallurgical industry. Application, significant results have been achieved in reducing the weight of the furnace body, transforming the structure, saving materials, and saving energy.

What are alumina hollow ball bricks?

Alumina hollow ball bricks Use alumina balls as the main body, they can be made into products of various shapes. The maximum operating temperature is 1800°C. The mechanical strength of the products is high, several times that of ordinary lightweight products, and the volume density is only one-half of corundum products. It is widely used in high-temperature and ultra-high-temperature kilns.

Advantages of refractory bubble alumina balls

1. High operating temperature: up to 1750 degrees or more, good thermal stability. The reheat line has a small change rate and can be used for a longer period.
2. Optimize the structure and reduce the weight of the furnace: the bulk density of high-temperature-resistant bricks currently used are heavy bricks of 2.6-3.0g/cm, while alumina hollow ball bricks are only 1.1-1.5g/cm. For the same cubic meter volume, Using alumina hollow ball bricks can save 1.1-1.9 tons of weight.
3. Save materials: To achieve the same operating temperature, if heavy bricks are used, the price is equivalent to that of alumina hollow ball bricks, and a considerable amount of insulation layer refractory materials are also required. If alumina hollow ball bricks are used, 1.1-1.9 tons of heavy bricks can be saved per cubic meter, and 80% of refractory insulation materials can be saved.
4. Energy saving: Alumina hollow balls have obvious thermal insulation properties and low thermal conductivity, which can have a good thermal insulation effect, reduce heat dissipation, and improve thermal efficiency, thereby saving energy. The energy-saving effect can reach more than 30%.