Refractory Mortar

Refractory mortar, also known as refractory mud or jointing material, is a high-temperature resistant paste or mixture, typically composed of materials like fireclay, high-alumina cement, silica, or magnesia-based compounds, corresponding to the brick type it serves. It is characterized by its excellent workability, suitable plasticity, and strong adhesive strength after drying and sintering. Key properties include:

1. High Temperature Resistance: It can withstand extreme temperatures, often exceeding 1500°C, without melting or degrading significantly.
2. Chemical Stability: It exhibits good resistance to chemical erosion from slag, molten metal, and flue gases.
3. Thermal Shock Resistance: Many formulations can endure rapid temperature changes without cracking.
4. Excellent Bonding Strength: Upon curing and firing, it forms a robust ceramic bond with the refractory bricks, ensuring the integrity of the lining.
5. Controlled Shrinkage/Expansion: Its thermal expansion characteristics are designed to match those of the adjoining bricks, minimizing stress at the joints.