Spesial High Alumina bricks with alumina content above 60% with raw materials of sillimanite, , andalusite, mullite dan corondum.
There are several grades of special high alumina firebrick refractories:
| 1. | Alumina 80 (SAL 80). Refractoriness point: 1670 oC Normal size: 230 x 114 x 65mm |
| 2. | Alumina 75 (SAL). Refractoriness point: 1650 oC Normal size: 230 x 114 x 65mm |
| 3. | Alumina 70 (SAL 70). Refractoriness point: 1600 oC Normal size: 230 x 114 x 65mm |
| 4. | Alumina 60 (SAL 60). Refractoriness point: 1580 oC Normal size: 230 x 114 x 65mm |
Used in rotary kilns, reheating furnaces, glass melting tanks, blast furnaces, fluidized bed boilers, non-ferrous metal furnaces, general industrial furnaces
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