Laurel refractory balls are made of refractory aggregates, refractory powders and binding agents are mixed, shaped and fired, and used as heat accumulators for ball-type hot air furnaces.
With strong heat storage capacity, refractory balls not only have high temperature resistance, high crushing strength, high refractoriness under load, but also have good peeling resistance, good thermal shock resistance and excellent creep resistance.
Product Details
Refractory balls are spherical refractory materials used in high-temperature industrial fields.
They are usually made from high-purity refractory raw materials, such as aluminum oxide, silicon carbide, cordierite, etc. Depending on different usage environments and requirements, various materials and formulations are selected. Refractory balls possess characteristics like high refractoriness, excellent thermal stability, high strength, strong abrasion resistance, outstanding chemical stability, and low thermal conductivity. These properties enable them to play a vital role in a variety of high-temperature equipment, including high-temperature kilns, chemical reactors, and metallurgical furnaces. They can serve as lining materials, thermal insulation materials, catalyst carriers, etc. They withstand harsh conditions such as high temperatures, thermal shock, chemical erosion, and mechanical wear, ensuring the normal operation of the equipment, extending its service life, and improving energy utilization efficiency at the same time.
Table parameters
Item | Data | ||||
High Alumina | Mullite | Corundum Mullite | Corundum | ||
Al2O3 | % | 60~65 | 65~75 | 75~85 | 88~90 |
Fe2O3 | % | ≤1.5 | ≤1.2 | ≤1.0 | ≤1.0 |
Bulk Density | g/cm3 | 2.0~2.3 | 2.3~2.5 | 2.5~2.8 | 2.8~3.1 |
Apparent Porosity | % | 20~22 | 20~22 | 18~22 | 18~20 |
Cold Crushing Strength | Mpa | ≥9 | ≥11 | ≥18 | ≥26 |
Stacking Density | kg/m3 | 1400~1500 | 1400~1600 | 1500~1650 | 1650~1800 |
Refractoriness Under Load | ℃ | 1450 | 1530 | 1550 | 1650 |
Features
★ High temperature resistant performance
★ High chemical stability
★ Excellent mechanical strength
Refractory balls have broad applications in industries thanks to their great properties. Main uses:
Metallurgy: In steelmaking furnaces like blast furnaces and converters, they serve as lining to endure high temps and resist molten metal/slag erosion, safeguarding the furnace and lengthening its life. Also used in blast furnace hot blast stoves for heat storage/transfer, boosting efficiency.
Chemistry: In reactors and furnaces, they withstand high temps and chemical corrosion. As catalyst carriers, they support reactions, enhancing efficiency and selectivity. And in insulation layers to cut heat loss and energy use.
Ceramics: In kilns, they line the kiln and support ceramics during firing. Resisting high temps and thermal shock, they ensure kiln operation and product quality. Also used in preheating/cooling zones to speed up heat transfer and shorten the firing cycle.
Glass: In furnaces, they're in combustion and melting areas to bear high temps and molten glass erosion. In regenerators, they recover heat, upping energy efficiency. Vital for stable glass-making and quality products.
Power: In coal-fired plants, they're in boilers and incinerators against high temps and ash/slag erosion. In flue gas treatment systems, they guard against acid gas corrosion. Also in insulation to reduce heat loss and improve thermal efficiency.
Applications
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