Refractories
Coil Grout
Refractory grout that protects the induction furnace coil and seals between lining and coil.
Coil grout is a refractory mortar applied to the outer surface of the copper coil in an induction furnace. It protects the coil from heat, metal leakage and mechanical damage, and fills the gap between coil and lining to maintain the integrity of the furnace structure.
Alumina and silica-based versions are common. Thermal conductivity, temperature resistance and compatibility with coil cooling affect furnace efficiency. For good application the surface should be clean and dry, and the grout applied homogeneously and without voids.
Cracking or spalling raises the risk of metal leakage, so the condition of the coil grout should be checked during periodic maintenance. Coil cooling water must be shut off when the grout is replaced.
Typical chemical analysis (%)
| Aluminium oxide (Al₂O₃) | 82-92 |
|---|---|
| Silicon dioxide (SiO₂) | 0,3-11 |
| Calcium oxide (CaO) | 1-6 |
Typical ranges. Exact values are given in the analysis certificate of each lot.
Product details
- Base
- Alumina or silica based
- Supply form
- Powder (mixed with water) or ready-mixed paste
- Packing
- 25 kg bag, 1 tonne big bag; pail for paste
Applications
- Induction furnace coil protection
- Filling the gap between lining and coil
- Furnace maintenance and coil repair