Rongsheng Refractories Group
Magnesium calcium iron dry tamping compound is a fireproof material for dry tamping, consisting mainly of CaO, MgO and Fe2O3 and usually containing small amounts of Al2O3 and SiO2. It is produced by high temperature sintering and dry compaction. It has high strength, Resistant to acid slag and working temperature, and widely used for heat preservation and flame retardant protection of various high temperature equipment.
Details of dry tamping mass made of magnesium calcium iron
| Subject | Index | ||||
| MGT-1 | MGT-2 | MGT-3 | MGT-4 | ||
| MgO % | ≥78 | ≥81 | ≥82 | ≥85 | |
| CaO % | 12~15 | 6~9 | 8~11 | 6~8 | |
| Fe2O3 % | 4~5 | 5~9 | 3~5 | 4~5 | |
| SiO2 % | ≤1.3 | ≤1.5 | ≤1.1 | ≤1.3 | |
| Al2O3 % | ≤0.6 | ≤0.6 | ≤0.6 | ≤0.6 | |
| Particle size distribution mm | 0~6 | 0~6 | 0~6 | 0~6 | |
| Bonding method | Bonded with ceramics | Bonded with ceramics | Bonded with ceramics | Bonded with ceramics | |
| Cold fired crushing strength, MPa | 1300℃×3h | ≥10 | ≥10 | ≥8 | ≥10 |
| 1600℃×3h | ≥30 | ≥30 | ≥30 | ≥30 | |
| Constant ramp% | 1300℃×3h | -0.2~-0.5 | -0.2~-0.5 | -0.2~-0.5 | -0.2~-0.5 |
| 1600℃×3h | -1.5~-2.5 | -2.0~-3.0 | -0.1~-0.2 | -1.5~-2.5 | |
| Bulk density of particles,g/cm3 | ≥3.25 | ≥3.25 | ≥3.25 | ≥3.25 | |
| Usage | Electric steel furnace | Electric steel furnace | Electric steel furnace | Electric steel furnace | |
What is dry tamping mass
Dry ramming mass is a type of amorphous refractory material, which uses a vibration method without adding water or liquid binder. Under the influence of vibration, the material can form a dense and homogeneous whole, and strength will be provided by a thermosetting binder or ceramic sintering agent when heated. Dry vibrating material consists of fireproof aggregate, powder, agglomerator and additives.
Production process of magnesium calcium iron tamping material
Mix natural magnesite, dolomite, lightly burned magnesia or other raw materials, containing calcium oxide, and raw materials, containing iron oxide, in a certain proportion, after fine grinding, ball pressing, calcination at high temperature in a shaft or tunnel furnace.
