Description of dolomite bricks
Dolomite brick is a refractory product made from 55-75% MgO and 18-42% CaO and other binders and additives. This brick is also referred to as magnesia-calcium brick. Due to the combination of high quality materials, dolomite high temperature refractory brick has high temperature resistance, thermal stability and alkaline characteristics, making it ideal for a variety of demanding environments.
Characteristics of dolomite bricks
| item | BY-1 | BY-2 | BY-3 | BY-4 | |
|---|---|---|---|---|---|
| MgO, % | ≥ | 68 | 58 | 48 | 38 |
| CaO, % | ≥ | 18 | 28 | 38 | 48 |
| MgO+CaO, % | ≥ | 90 | |||
| ZrO2, % | ≥ | 1.00 | |||
| SiO2, % | ≤ | 1.50 | |||
| Fe2O3，% | ≤ | 1.50 | |||
| Al2O3, % | ≤ | 1.00 | |||
| Bulk density, g/cm³ | ≥ | 2.90 | 2.85 | ||
| Apparent porosity, % | ≤ | 17 | |||
| Cold crushing strength, Mpa | ≥ | 40 | 35 | ||
| Fire resistance under load T0.6, ℃ | ≥ | 1650 | 1600 | 1550 | |
| Thermal shock resistance, water cooling 950°C/time | ≥ | 30 | |||
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