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Mullite castable is a refractory castable made of high-quality porous mullite aggregate as raw material, mixed with fine powder and additives. The critical particle size of mullite aggregate is 12mm; the long-term use temperature is 1350 degrees.
Physical and chemical indicators of mullite castables
| Item | RS-20 | |
| Al2o3(%) | 65 | |
| Sio2(%) | 25 | |
| Service high temperature(℃） | 1500 | |
| Bulk Density（g/cm3） | 2.5 | |
| Cold crushing Strength | 110℃*24h | 100/10 |
| 1100℃*3h | 110/10 | |
| 1500℃*3h | – | |
| Post line rate of change | 1100℃*3h | -0.1~-0.3 |
| 1500℃*3h | – | |
| Water addition（%） | 5.0-6.5 | |
Characteristics of mullite castable
It has the advantages of good thermal shock stability, low creep rate, small thermal expansion and strong chemical corrosion resistance.
Application of mullite castables
Mullite castables are used in petrochemical industry tubular heating furnaces, light diesel oil, ethane cracking furnace linings, atmospheric and vacuum furnaces, sulfur recovery units, steam boilers, tortoiseshell insulation layers, two-vessel cylinders and pipeline insulation single layers, other industrial furnace doors, fire holes, observation hole door linings, etc.
Our refractory materials?
Rongsheng Refractory Material Co., Ltd. is a company specializing in the production of refractory materials for kilns. It can provide different types of refractory bricks, and amorphous materials including castables, refractory cement, refractory mortar, refractory plastics, etc. If you need, please feel free to contact us.
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