MINRO-AL CAST A44 is a tabular alumina-based refractory castable recommended for application to the inside face of coreless induction furnace coils in all melting and holding applications. MINRO-AL® CAST A44 is also suitable where grout and rings are cast as a monolith. This product offers many benefits and features, including forming a solid container for the proper support of the working lining, the ability to be electrically insulative when applied between induction coils, and a usefulness as an entirely new coil coating, or for patching existing coatings.
• material required 2.72 g/cm3 (170 lb/ft3);
• grain size 1.5 mm (14 mesh) and finer;
• maximum practical use temperature 1815 °C (3300 °F);
• installation method: vibration or trowel;
• procedure(s) CL-1, CL-2, CL-4, CL-37, CL-40.
| Temperature °C (°F) | 315 (600) | 540 (1000) | 760 (1400) | 980 (1800) |
| Density g/cm3 (lb/ft3) | 2.71 (169) | 2.71 (169) | 2.61 (163) | 2.71 (169) |
| PLC* % | -0.1 | -0.2 | -0.2 | -0.2 |
| МOR MPa (psi) | 7.0 (1010) | 6.8 (990) | 6.7 (975) | 4.8 (700) |
| HMOR MPa (psi) | - | - | - | 3.6 (520) |
| Porosity % | - | - | - | - |
| Al2O3 | 95,3% |
| CaO | 3,8% |
| SiO | 2 0,6% |
| Fe2O3 | 0,1% |
Packaging information:
• 25 kg (55 lb) multi-wall paper bags;
• bulk bag packaging available upon request;
• shelf life, storage beyond 24 months not recommended. Store in a dry location to avoid moisture pickup.
Set Times & Water Requirements:
• water required (vibration cast 10-11%), (trowel 9%);
• working time (up to 45 minutes);
• initial set (1 – 3 hours);
• final set (3 – 6 hours).