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Honeycomb ceramics regenerator is the key part of high temperature air combustion (HTAC). It has the following notable characters: perfect high-temperature resistance, anticorrosion, perfect thermal shock stability, high mechanical strength, large thermal storage capacity, advantaging heat- conduction property, energy-conserving result and service life are improved greatly. It is extensively used in many kinds of heater, sirocco furnace, heat treatment furnace, cracking column, roaster, melting furnace, balance heating stove and etc. The results show that the honeycomb ceramics regenerator has high heat transfer efficiency, which can reach 87.02% at the temperature of 1130°C, and the combustion temperature is stable at the moment of switching. Mainly materials are cordierite, mullite, alumina and corundum.
1. Physical & chemical properties ofhoneycomb ceramics regenerator:
| Performance index | Mullite | Cordierite | Corundum | |
| Chemical Content | SiO2 | 25-30% | 46-52% | 8-11% |
| AL2O3 | 70-72% | 32-37% | 85-92% | |
| MgO | / | 12-16% | 1.8-2.5% | |
| Fe2O3 | ≤1.0% | ≤1.0% | ≤0.5% | |
| Na2O+K2O+CaO | ≤1.0% | ≤1.0% | 0.5-12% | |
| TiO2+BaO | / | ≤1.0% | / | |
| Compressive Strength(Mpa) | Lengthways | ≥30 | ≥30 | ≥30 |
| Horizontal | ≥10 | ≥10 | ≥10 | |
| Density (g/cm3) | ≥2.9 | ≥2.5 | ≥3.2 | |
| Water-absorbing rate(%) | 15-30 | 15-30 | 15-25 | |
| Coefficient of Thermal Expansion (×10-6/°C) | 3.0-5.5 | 3.0-5.0 | 5.0-7.0 | |
| Thermal Capacity(J/Kg.k) | 850-1050 | 800-1200 | 1300-1400 | |
| Thermal Conductivity (W/Mk) | 1.4-2.0 | 1.3-1.8 | 5.0-10.0 | |
| Highest Working Temperature(°C) | 1550 | 1350 | 1600 | |
Honeycomb ceramics regenerator