High-temperature resistant ceramic beads, engineered to withstand temperatures exceeding 1800°C, is a cornerstone of refractory applications across metallurgy and industrial heating. Its exceptional thermal stability arises from its high alumina content (70-90%), which forms a crystalline structure resistant to thermal shock.
In steelmaking, this ceramic beads lines ladles and tundishes, protecting them from molten metal at 1600°C. Unlike silica-based refractories that soften at high temperatures, high-temperature resistant ceramic bead maintains its shape, reducing downtime caused by refractory failure. Its low thermal expansion (≤5×10⁻⁶/°C) prevents cracking during rapid temperature changes, a common issue in continuous casting processes.
The material's inertness makes it suitable for contact with reactive metals like aluminum and titanium. It does not react with molten alloys, ensuring metal purity in aerospace component casting. In glass manufacturing, high-temperature resistant ceramic bead supports molten glass flows, withstanding corrosive silica-rich environments that degrade other refractories.
Refractory bricks containing high-temperature resistant ceramic beads have a service life 50% longer than conventional bricks in cement kilns. This longevity reduces maintenance costs and operational disruptions. The sand's porous structure also enhances insulation, lowering energy consumption in industrial furnaces by up to 12%.
Recent innovations have improved the material's thermal shock resistance further. By adjusting particle size distribution, manufacturers created a gradient structure that dissipates heat more efficiently. This advancement makes high-temperature resistant ceramic beads indispensable in emerging high-heat processes like hydrogen-based steelmaking, where extreme conditions demand superior refractory performance.
1 . Chemical Index：
|
ZrO2 |
60-66% |
|
SiO2 |
25-30% |
|
Al2O3 |
7-13% |
2 . Physical Index
|
Processing: |
Melting |
|
Bulk Density: |
2.3g/cm3 |
|
True Specific Gravity |
3.97 g/cm3 |
|
Vickers Hardness: |
700 kg /mm2 |
|
3 . sizes B series Particle size range (mm): |
Z series Particle size range (mm): |
|
B20:0.600-0.850 B30:0.425-0.600 B40:0.250-0.425 B60:0.150-0.300 B80:0.125-0.212 B100: 0.106-0.180 B120:0.063-0.125 B150: 0.053-0.106 B170:0.045-0.090 B205:0.000-0.063 |
Z100: 0.100-0.150 Z150: 0.150-0.210 Z210: 0.210-0.300 Z300: 0.300-0.425 Z425: 0.425-0.600 Z600: 0.600-0.850 Z850: 0.850-1.180 |
Special sizes can be customized.
4 . Benefits of Ceramic Beads
1.Ceramic beads have long service life and high profitability:
The service life of ceramic balls is more than 30 times that of glass balls. Ceramic sand will not wear out, only a small amount breaks into pieces, broken ceramic balls will still retain the original size, shape and hardness. The surface is smooth, this is enough for disposal.
2. Ceramic balls do not produce dust. This is enough to effectively reduce the dust content and final waste in the working environment, to effectively protect the environment from pollution and make it harmless to workers.
3.Ceramic balls have high hardness, long service life, good elasticity, low wear, can effectively reduce the number of replacement materials, reduce labor costs. Whether dry sandblasting, wet sandblasting or crushing, ceramic sand can bring high efficiency.
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