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
Fe2O3, maximum

 

63
1,2

Compressive strength, N/mm2, minimum, for numbers of bricks:

1, 2

3, 4

5-10

 


60

70

30

Open porosity,%, maximum, for numbers of bricks:

1-4

5-10

 


16

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 brickDimensions, mm
  a б в
1 550 200 150
2 550 200 120
3 400 200 120
4 400 200  100

Number of brickDimensions, 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 brickDimensions, mm
  a б б1 в в1
9 550 180 200 130  150
10 400 180 200 100 120