Corundum Kiln
Corundum Kiln are
widely applied in construct material of kiln and high temperature
vessel because of outstanding refractoriness, high strength
under high temperatures and no stain to product. Chemical
composition and physical property of Corundum Kiln
| Type |
99A |
99B |
95A |
95K |
95T |
90M |
90A |
| Chemical
composition,% |
Al2O3 |
99 |
98.6 |
95 |
87 |
95 |
90 |
90 |
| SiO2 |
0.15 |
0.75 |
1.5 |
0.5 |
1.5 |
5 |
3.0 |
| Fe2O3 |
0.15 |
0.1 |
0.5 |
0.5 |
0.5 |
0.4 |
3.0 |
| TiO2 |
0.20 |
0.25 |
1.0 |
1.0 |
3.0 |
0.5 |
3.0 |
| Na2O |
0.15 |
0.30 |
0.40 |
0.25 |
0.25 |
0.25 |
0.40 |
| Cr2O3 |
|
|
|
10.0 |
|
|
|
|
Apparent porosity, % |
18 |
18 |
20 |
16 |
20 |
18 |
20 |
| Bulk
density, g/cm3 |
3.2 |
3.15 |
3.10 |
3.25 |
3.10 |
3.00 |
2.95 |
| Crushing
strength, MPa |
100 |
90 |
40 |
130 |
55 |
70 |
90 |
| Bending
strength, Mpa |
9 |
8 |
6 |
18 |
6 |
9 |
11 |
| Permanent
linear change
1600℃×3h % |
0.1 |
0.2 |
0.5 |
0.2 |
0.5 |
0.5 |
0.5 |
| Refractoriness
under load,
0.2Mpa, 0.6%℃
|
1700 |
1700 |
1650 |
1700 |
1680 |
1680 |
1650 |
Thermal
shock resistance，
times1100℃，water-cooling |
6 |
8 |
11 |
16 |
19 |
18 |
10 |
| Thermal
expansion percent，
% 20～1300℃
|
1.04 |
1.05 |
1.00 |
0.95 |
0.50 |
0.70 |
1.00 |
|
|
