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Capital’s NRM Linings for Large Induction Furnaces
Capital manufactures a specialised range of NRM linings, specifically developed to withstand the arduous conditions experienced by large induction furnaces (15–50 tonnes) in mini mill steel plants. These spinel-forming linings are produced using high-quality alumina and magnesia, ensuring exceptional durability and performance.
Capital Refractories offer a full range of coreless induction furnace linings, topping and patching products for a wide range of steels and high temperature alloys.
A range of air setting, chemically bonded high strength materials and dry vibration products compatible with Capital’s dry linings.
High grade fine hydraulic cements.
The slip plane is positioned against the coil screed to provide a smooth surface. This is essential for uninhibited reversible movement of the refractory lining caused by its thermal expansion and contraction. The mica also offers a degree of protection against metal penetration.
Mica Mesh
A sandwich of metal mesh between two layers of mica is available which is used in systems that give early warning of metal penetration through a lining.
Hydraulically bonded multi-purpose castable.
| Product Name | Product Description | Bond | Max Service Temperature / °C |
| Coral CXL | General purpose lining with a wide melting temperature range. | Ceramic | 1700* 1730† |
| Coral SP1 | A dense dry spinel-forming ramming mix for large steel plants. | Ceramic | 1750* 1800† |
| Coral SP3 | A dense dry spinel-forming ramming mix for large steel plants melting a wide range of agressive alloys. | Ceramic | 1720* 1800† |
| Coral GR9 | A dense dry spinel forming ramming mix for a wide range of steels and high alloyed, non-ferrous metals. | Ceramic | 1700* 1760† |
| Coral SXL | High duty lining developed to withstand elevated temperatures and retain a good level of powder at the back face. | Ceramic | 1700* 1750† |
| Coral SMC | Incorporates complex chromes for improved slag resistance. | Ceramic | 1700* 1750† |
| Coral 85 | High performance lining designed for large furnaces operating at high temperatures. | Ceramic | 1700* 1750† |
| Coral VAC | High duty lining developed to withstand prolonged elevated temperatures and retain a good level of powder at the back face. | Ceramic | 1720* 1750† |
| Cormag 90 | Basic ramming mix for use in continuous melting applications. | Ceramic | 1700* 1750† |
| Coral NGB | A dense dry spinel-forming ramming mix the melting of steels, typically carbon steels, and high alloyed, nonferrous metals particularly at higher temperatures and more aggressive environments. | Ceramic | 1750* 1800† |
| Coral TL4 | A dry spinel forming ramming mix for use on large steel plant coreless induction furnaces for the melting of a wide range of steels. | Ceramic | 1750* 1800† |
* Normal maximum operating temperature
† Short term maximum operating temperature.
| Product Name | Product Description | Bond | Max Service Temperature / °C |
| Almacap | Silicate bonded high alumina hard wearing rammable. | Chemical | 1650 |
| Capram 80 C5 | Chemically bonded chrome enriched alumina silicate plastic | Chemical | 1700 |
| Capram 90 | Chemically bonded high alumina plastic | Chemical | 1800 |
| Capram 85 | Chemically bonded high strength high alumina refractory ramming mix | Chemical | 1650 |
| Coral Cap | A dense, dry spinel forming ramming mix | Ceramic | 1700 |
| WS 90 Rammable | Chemically bonded high alumina ramming mix | Chemical | 1800 |
| Product Name | Product Description | Max Grain Size/mm | Bond | Max Service Temperature / °C |
| Silkote 90 | Hydraulically bonded, high alumina induction furnace coil screed with a very smooth surface. | 1 | Hydraulic | 1700 |
| Capscreed | Hydraulically bonded, high alumina high strength induction furnace coil screed for push-out furnaces. | 1 | Hydraulic | 1680 |
| Capscreed 96C | A high fluidity, self-flowing, high alumina castable | 1 / 3 | Hydraulic | 1800 |
| Capgrout G | Hydraulically bonded, high alumina, induction furnace coil grout (mudding/screed) material with easy applicability.. | 1 | Hydraulic | 1700 |
| Product Name | Length / m | Width / m | Thickness / mm | Form |
| Mica Sheet | 1.2 /1.8 / 2.2 | 1.0 | 0.4 | Sheet |
| Mica Roll | 12.5 | 1.0 | 0.3 | Roll |
| Mica Glass | 20.0 | 1.0 | 0.4 | Roll |
| Combi-Roll | 12.5 | 1.0 | 2.0 | Roll |
| Mica Foil | 20.0 | 1.0 | 0.4 | Roll |
| Mica Weave | 20.0 | 1.0 | 0.28 | Roll |
| Product Name | Product Description | Bond | Max Service Temperature / °C |
| D10 Plaster | Aluminosilicate patching plaster. | Chemical | 1700 |
| D10F | A finer version of D10 Plaster. | Chemical | 1700 |
| D11 | High grade high alumina patching material. | Chemical | 1800 |
| Capram 90F | High grade high alumina patching and topping material. | Chemical | 1800 |
| Capram 90LP | High Performance chemically bonded, high alumina, plastic/plaster | Chemical | 1800 |
