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Capital Refractories supplies gas diffusers for use in induction furnaces in a range of qualities, sizes and fittings.
Our gas diffusers complement our range of dry rammed linings, that can be operated continuously or intermittently, and are designed to last the life of the lining.
The standard range for induction furnaces is made with Caperdiff 94AL (a high alumina quality) and stainless steel cans and are usually available from stock (except IF 6).
| Product Name | Product Description |
| Caperdiff 94AL | Pressed and fired permeable alumina diffuser for both ferrous and non-ferrous application. A high strength product where mechanical damage (cleaning) may be an issue, together with a low pore size to give a finely dispersed bubble swarm. |
| Caperdiff 90ALR | Pressed and fired permeable alumina diffuser designed specifically for aluminium applications. A high strength product whose chemistry and physical properties have been modified to resist penetration by aluminium yet permit sufficient gas flow for effective treatment of the melt. Can be utilised for inert gas stirring or reactive purging with chlorine. |
| Caprax ASF DP | A low cement, alumina-mag spinel directional or channel porosity diffuser, for application in steel ladles where there is an aggressive slag environment. |
To avoid confusion it is recommended to include the drawing number on any order.
Caperdiff 94AL is one of a range of qualities designed for use The quality of the plug depends on the application.
| Gas Diffuser Model | Gas Diffuser Model | Lining Thickness | Lining Thickness |
| Name* | Drawing No. | (mm) | (inch) |
| MINI | 7204 | < 75 | < 3 |
| IF 1.5 | 7220 | < 75 | < 3 |
| IF 2 | 7205 | < 75 | < 3 |
| IF 3 | 7206 | 100 - 150 | 4 - 6 |
| IF 4 | 7207 | 150 - 200 | 6 - 8 |
| IF 5 | 7217 | 200 - 250 | 8 - 10 |
| IF 6 | 7228 | > 250 | > 10 |
* The name: IF refers to induction furnace and the number is the nominal size in inches.
| Gas Diffuser Model | Gas Diffuser Model | Lining Thickness | Lining Thickness |
| NAME* | Drawing No. | (mm) | (inch) |
| IF 2 | 7235 | 75 - 100 | 3 - 4 |
| IF 3 | 7236 | 100 - 150 | 4 - 6 |
| IF 4 | 7237 | 150 - 200 | 6 - 8 |
