1. High cold crushing strength
2. High refractoriness under the load
3. Good creep resistance
|
ZA-55 |
ZA-62 |
ZA-65 |
||
|
Al2O3 percent |
Greater than or equal to 55 |
Greater than or equal to 62 |
Greater than or equal to 65 |
|
|
Fe2O3 percent |
Less than or equal to 1.2 |
Less than or equal to 1.2 |
Less than or equal to 1.2 |
|
|
Bulk density (g/cm3) |
Greater than or equal to 2.45 |
Greater than or equal to 2.5 |
Greater than or equal to 2.5 |
|
|
Less than or equal to 17 |
Less than or equal to 17 |
Less than or equal to 17 |
||
|
Greater than or equal to 60 |
Greater than or equal to 60 |
Greater than or equal to 60 |
||
|
Greater than or equal to 1600 |
Greater than or equal to 1650 |
Greater than or equal to 1680 |
||
|
Thermal expansion coefficient(1000 degree ) |
Less than or equal to 0.55 |
Less than or equal to 0.55 |
Less than or equal to 0.55 |
|
|
20-50h,( percent ) |
1350 degree <0.2 |
1400 degree <0.2 |
1450 degree <0.2 |
|
