Refractory ball

The refractory ball is a mixture of granules and powders with yellow dextrin, clay powder, and other additives, which are then shaped and fired.

Physical and chemical indicators of refractory balls

Item	Index
Item	High aluminum ball	Mullite ball	corundum mullite ball	Corundum ball	Contains zirconium ball
Al2O3 %	60~65	65~75	75~85	88~90	65~80
Fe2O3 %	≤1.5	≤1.2	≤1.0	≤1.0	2~8(ZrO2)
Bulk density g/cm3	2.0~2.3	2.3~2.5	2.5~2.8	2.8~3.1	2.7~3.1
Apparent porosity %	20~22	20~22	18~22	18~20	20~22
Normal temperature withstand voltage value KN	≥9	≥11	≥18	≥26	≥28
Bulk weight kg/m3	1400~1500	1400~1600	1500~1650	1650~1800	1700~1800
Specific surface area m2/m3	200~220
Thermal expansion coefficient ×10-6/℃	5.0	5.5	6.0	7.0	6.0
Specific heat capacity reference value×103J/(kg·K)	1.1	1.1	1.2	1.3	1.2

Characteristics of heat storage fireballs

Fire-resistant balls are resistant to high temperatures
Good creep resistance
Pressure resistant
High heat storage efficiency
Good thermal stability
Durable

The function of heat storage ball

The function of refractory balls is to prevent the furnace lining from burning through. It plays the role of gas-liquid, supporting and protecting catalysis in the furnace; its most widely used application is the regenerator of hot blast furnaces.

Refractory ball’s material and size

High-temperature fireballs come in different materials and diameters, such as high-aluminum refractory balls, corundum refractory balls, silicon refractory balls, magnesia-aluminum refractory balls, mullite refractory balls, etc. The size of refractory balls is divided into diameters: 40, 50, 60.

Application range of heat storage balls

Refractory balls are suitable for regenerative heating furnaces in the steel industry, regenerative ladle roasters, air separation equipment regenerators, regenerative chamber smelting furnaces in the non-ferrous metal industry, etc.

Packaging and shipping

Fire-resistant balls are packed in tons of bags and the delivery time is 7-12 days. The delivery time is related to the material and quantity of the ordered product. If you need more details about refractory balls, you can contact us.