Fire-clay Bricks for Laying of Blast Furnaces

Bricks are used for lining of different zones of furnace.

Technical characteristics

 Rate for grade
  ShPD-39 ShPD-41 ShPD-43
GOST 1598-96

Mass fraction, %:

Al2O3, minimum

Fe2O3, maximum

 

39

1,5

 

41

1,5

 

43

1,5

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

5, 6, 7,8

other

 


-

50

 


40

70

 


40

70

Open porosity, %, maximum 16 12 12
Остаточное изменение размеров при нагреве, %, не более при температуре 1450 °C 0,3 0,2 0,2
Refractoriness, °С, minimum 1750
Temperature of initial softening, °С, minimum 1440 1500 1530

Form and dimensions

Straight brick

Number of brickDimensions, mmGroup of complication
   a в б  
1 230 75 150 3
2 345 75 150 3
3 230 75 115 2
4 345 75 115 3
5 230 150 150 6
6 345 150 150 6
7 230 90 150 5
Side arch brick
Number of brickDimensions, mmGroup of complication
   a в в1 б  
8 230 109 62 150 6

Trapezoidal brick

Number of brickDimensions, mmGroup of complication
   a в б б1  
9 230 75 150 135 4
10 345 75 150 125 4
11 230 75 150 120 4
12 345 75 150 110 4

 

Dimensions,mmLimit deviation, mm, for grades of brick
   ShPD-41, ShPD-43 ShPD-39
Number of bricks 
1, 2, 9, 10 5, 6 7, 8 1, 2, 3, 4, 9, 10, 11, 12
Ground  Unground  Ground Unground
Length a:  
hearth ±1 - ±2 ±1 -
others  
- with length of 230  - ±2 - - ±2
- with length of 345  - ±3 - - ±3
Width с, с1 ±2 ±2 ±0,5 ±2 ±2
Thickness b, b1:  
hearth ±0,5 - ±0,5 ±0,5 -
others - ±1 - - ±1