Introduction of Alumina bubble Brick

Alumina bubble brick is made of alumina hollow balls and alumina powder as the main raw materials, combined with other binders, and fired at a high temperature of 1750 degrees. It belongs to a kind of ultra-high temperature material energy-saving insulation material.

Application of alumina bubble brick

Alumina hollow sphere is a new type of high-temperature insulation material. It is made by smelting and blowing industrial alumina in an electric furnace, and its crystal form is a-Al2O3 microcrystals. With alumina hollow spheres as the main body, it can be made into products of various shapes. The maximum use temperature is 1800℃. The mechanical strength of the products is high, which is several times that of general lightweight products, and the bulk density is only one-half of corundum products. It has been widely used in high temperature and ultra-high temperature furnaces such as petrochemical industry gasification furnaces, carbon black industrial reaction furnaces, metallurgical industry induction furnaces, etc., and has achieved very satisfactory energy-saving effects.

Advantages of alumina bubble brick

1. High operating temperature: up to 1750 degrees or more, with good thermal stability. The reheating line has a small change rate and can be used for a longer time.

2. Optimize the structure and reduce the weight of the furnace body: The bulk density of heavy bricks currently used in high-temperature materials is 2.6-3.0g/cm, while the alumina bubble bricks are only 1.1-1.5g/cm, the same volume of one cubic meter. The use of alumina bubble bricks can reduce the weight of 1.1-1.9 tons.

3. Material saving: to reach the same operating temperature, the price of heavy bricks is equivalent to that of alumina bubble bricks, and considerable refractory materials are required for the insulation layer. 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 spheres have obvious thermal insulation properties and low thermal conductivity, which can play a very good thermal insulation effect, reduce heat dissipation and improve thermal efficiency, thereby saving energy. The energy saving effect can reach more than 30%.

TDS of alumina bubble brick

Al2O3% ≥ 98

SiO2% ≤ 1

Fe2O3% ≤ 0.7

Refractoriness(℃) ≥ 1790

Refractoriness under Load 0.1Mpa (℃) ≥ 1600

Apparent Porosity % ≥ 62

Bulk Density  (g/cm3) ≥ 1.2

Cold Crushing Strength (Mpa) ≥ 3