Dolomite bricks, also known as magnesia-calcium bricks and MgO-CaO bricks, are refractory products made of 55-75% MgO and 18-42% CaO plus other binders and additives. Due to the combination of high-quality materials, dolomite high-temperature refractory bricks have high temperature resistance, thermal stability and alkalinity, making them very suitable for various harsh environments.
| الصنف/الرتبة | MG-20 | MG-20A | MG-30 | MG-30A | MG-40 | MG-40A | MG-50 | |
|---|---|---|---|---|---|---|---|---|
| ω (CaO)/% | μ0 ≥ | 18 | 28 | 38 | 48 | |||
| ω (MgO+CaO)/% | μ0 ≥ | 92 | 94 | 92 | 94 | 92 | 94 | 94 |
| ω (SiO2+Al2O3+Fe2O3)/% | μ0 ≤ | 3 | 2.5 | 3 | 2.5 | 3 | 2.5 | 2.5 |
| Apparent Porosity/% | μ0 ≤ | 15 | ||||||
| قوة السحق على البارد/ميجا باسكال | μ0 ≥ | 60 | ||||||
| 0.2MPa Refractoriness Under Load T0.6/℃ | μ0 ≥ | 1650 | 1700 | 1650 | 1700 | 1650 | 1700 | 1700 |
1. High refractoriness 2. Good thermal shock resistance 3. Low porosity 4. Good slag resistance
Dolomite bricks are widely used in various high-temperature industrial fields. They are commonly applied in steelmaking furnaces, such as electric arc furnaces and ladles, as well as in cement kilns and glass furnaces to resist high temperatures and protect the furnace linings.