Description of high alumina packing material
High alumina packing is an unmolded refractory material used mainly for lining industrial furnaces.
Usually supplied in dry (bulk) form. The lining is laid by tamping - the material is tamped using disposable or reusable templates, or a vibrating tool can be used.
Characteristics of high alumina packing material
| Element | High alumina ramming mass | ||
|---|---|---|---|
| Maximum operating temperature (℃） | 1500 | 1600 | |
| Bulk density(g/cm3) | 2.6 | 2.65 | |
| Al2O3(%) | 75 | 78 | |
| SiO2(%) | 20 | 15 | |
| Bending strength in cold condition | 110℃*24h | 8 | 10 |
| 1100℃*3h | 8 | 10 | |
| Compressive strength in cold condition | 110℃*24h | 80 | 100 |
| 1100℃*3h | 80 | 100 | |
| Rate of change of the combustion line | 110℃*24h | +_0.5 | -0.5 |
Where used
Unmolded refractory concretes for furnaces (packing masses) are used for:
of induction furnace crucible liners;
construction of monolithic lining in industrial electric furnaces and other thermal units;
wrapping of ladles for pouring molten metals;
manufacture and repair of monolithic lining of casting ladles.
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