Mullite high-refractory refractories for laying of blast furnace bottom
Mullite high-refractory refractories for laying of blast furnace bottom
Technical characteristics
Rate for grade | |
---|---|
MLLD | |
GOST 10381-94 | |
Mass fraction, %: Al2O3, minimum |
63 |
Compressive strength, N/mm2, minimum, for numbers of bricks: 1, 2 3, 4 5-10 |
70 30 |
Open porosity,%, maximum, for numbers of bricks: 1-4 5-10 |
17 |
Residual variation of dimensions when heating, %, maximum at 1500 °С |
0,2 |
Temperature of initial softening under load of 0,4 N/mm2, °C, minimum | 1500 |
Form and dimensions
Straight brick
Number of brick | Dimensions, mm | ||
---|---|---|---|
a | б | в | |
1 | 550 | 200 | 150 |
2 | 550 | 200 | 120 |
3 | 400 | 200 | 120 |
4 | 400 | 200 | 100 |
Number of brick | Dimensions, mm | |||
---|---|---|---|---|
a | б | в | в1 | |
5 | 550 | 200 | 150 | 75 |
6 | 550 | 200 | 100 | 50 |
7 | 400 | 200 | 120 | 75 |
8 | 400 | 200 | 120 | 50 |
Number of brick | Dimensions, mm | ||||
---|---|---|---|---|---|
a | б | б1 | в | в1 | |
9 | 550 | 180 | 200 | 130 | 150 |
10 | 400 | 180 | 200 | 100 | 120 |