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Refractory mortar is used to joint material of refractory bricks
Characteristics and applications:
Good plasticity, easy construction;2.High strength bond strength and corrosion resistance; 3.high refractoriness, up to 1650 ℃ ± 50 ℃;4.Good resistance to slag invasion 5.Thermal spalling resistance is good ,Refractory mortar is mainly applied to coke oven, glass furnace, blast furnace hot stove, other industrial furnace, it also used in the industries as following : metallurgy, building materials, machinery, petrochemical, glass, boilers, electricity, steel, cement and so on.
| Item | Corundum based | First class high aluminum | Second, third class high aluminum | Fireclay | Alumina-magnesia based | Spinel quality | Clay light | ||||
| Grade | 90 | 80 | A—75 | LQ—55（53） | NQ—42 | MA—70 | MA—42 | MA—30 | / | ||
| Al2O3，%≥ | 90 | 85 | 85 | 55,53 | 42 | 50 | 42 | 70 | 40 | ||
| MgO,% ≥ | / | / | / | / | / | 30 | 43 | 8 | / | ||
| Refractoriness ℃ ≥ | 1790 | 1790 | 1790 | 1770 | 1710 | 1710 | 1790 | 1790 | 1650 | ||
| Bonding time （s） ≥ | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | ||
| Bonding strength （MPa） | 110℃X24h≥ | 2 | 2 | 1.0 | 1.0 | 1.0 | 1.0 | 1.5 | 1.0 | 0.8 | |
| 1500℃X2h≥ | 8 | 6 | 6 | / | / | / | / | 6 | / | ||
| 1400℃X2h≥ | / | / | / | 4 | / | 5 | / | / | / | ||
| 1200℃X2h≥ | / | / | / | / | 3.0 | / | / | / | / | ||
| Particle size | ≤0.5 | 97 | 97 | 97 | 97 | 97 | / | 97 | 97 | / | |
| ≤0.75 | 50 | 50 | 50 | 50 | 50 | / | / | / | / | ||
| ＞1 | N/A | ||||||||||