Main Data

See also

Refractories for steel ladle lining

Refractories are used for steel ladle lining and other termal units.

Technical characteristics

 Rate for grade
  ShKU-32 ShKU-37 MKRKU-45
 MKRKP-45
 MLKS-62
GOST 5341-2016

Mass fraction, %:

Al2O3, minimum

Al2O3, over

Fe2O3, maximum

 

32

-

-

 

37

-

-

 

-

45

3,5

 

-

45

3,5

 

-

62

1,4
Refractoriness, °С, minimum 1690 1730(1710) 1730 1730 -
Compressive strength, N/mm2, minimum 27 30(27) 35 40 30
Open porosity, %, maximum 19 18(19) 18 16 22

Residual variations of sizes when heating, %, maximum at:

1400 °C

1500 °C

 

 

+0,3

-

 

 

+0,3

-

 

 

+0,4

-

 

 

+0,2

-

 

 

-

0,4
Temperature of initial softening, °С, minimum 1370 1400(1370) 1400 1400 1450
Thermal shock resistance, heat cycles , minimum
 4* 4(3)* 3* 4* -

 

 Rate for grade
  MLKU-62
 MLKU-69 MKKS-72 MKKS-75 MKKS-90
GOST 5341-2016

Mass fraction, %:

Al2O3, minimum

Al2O3, over

Fe2O3, maximum

 

-

62

1,1

 

69

-

1,0

 

-

72

1,5

 

75

-

2,2

 

90

-

0,8
Compressive strength, N/mm2, minimum 50 50 30 40 50
Open porosity, %, maximum 17 19 24 23 24

Residual variations of sizes when heating, %, maximum at:

1600 °C

 

 

-

 

 

-

 

 

+1,0

 

 

+2,5

 

 

-
Temperature of initial softening, °С, minimum 1600 1650 1500 1420 1660
Thermal shock resistance, heat cycles , minimum
 15* 15* - 3* -


*Rates are defined as agreed between the consumer and manufacturer.

 Rate for grade
  KMKRU-45 KMKRU-50 KMKRU-55
Spec. 14-8-647-94 rev. 1-3

Mass fraction, %:

Al2O3, minimum

Fe2O3, maximum

 

45

3,5

 

50

4,4

 

55

4,0
Refractoriness, °С, minimum 1730 1730 1730
Compressive strength, N/mm2, minimum 35 33 35
Open porosity, %, maximum 19 19 19

Residual variations of sizes when heating, %, maximum at:

1400 °C  

 

 

0,4

 

 

0,4

 

 

0,4
Thermal shock resistance, heat cycles , minimum
 4 4 4

 

 Rate for grade
  KBU KBU-60
Spec. 14-194-300-10 rev. 1

Mass fraction, %:

Al2O3, minimum

Fe2O3, maximum

 

55

4

 

60

3
Refractoriness, °С, minimum 1750 1770
Compressive strength, N/mm2, minimum 35 45
Open porosity, %, maximum 20 19

Residual variations of sizes when heating, %,within limits of:

1400 °C  

 

 

from -0,4 to +1,0

 

 

from -0,4 to +1,0
Thermal shock resistance, heat cycles , minimum
 4 6

Form and dimensions

 

Double-sided featheredge brick

Number of brickDimensions, mmGroup of complication
  S S1 L H - course thickness  
1 140 120  250  65  3 
2 140 125 250 80 4
2а 80 68 300 120 4
2б 80 68 300 160 4

End arch brick

Number of brickDimensions, mmGroup of complication
  S S1 L H- course thickness
  
3 140  135  250  65  3 
4 140 135 250 80 4

Trapezoidal brick

Number of brickDimensions, mmGroup of complication
  S S1 L H-course thickness
  
6 250  239  80  80  4 
7 210 181 80 100 4
8 230 209 80 100 4
9 250 236 80 100 4
10 210 176  80 120 4
11 230 206 80 120 4
12 230 212 80 120 4
13 250 235 80 120 4
14 210 178  80 150 4
14а 225 205  80 150 4
15 230 205  80 150 4
15а 245 210  80 150 4
16 250 232  80 150 4
16а 250 228  80 150 4
18 220 192  80 200 4
19 240 216  80 200 4
20  230 200  80 250 4
21  250 221  80 250 4

Trapezoidal brick b/b1<1

Number of brickDimensions, mmGroup of complication
  S S1 L H1 H-course thickness
  
b/b1 ≥1      
21a  240 213 200 80 60 4
Number of brickDimensions, mmGroup of complication
  S S1 H H1 L-course thickness
  
b/b1 ≤1
22 230  205 40  40  150  4 
23 230 205 40 50 150 4
24 230 205 50 60 150 3
25 230 205 60 70 150 4
26 230 205 70 80 150 4
27 220 192 40 40 200 4
28 220 192 40 50 200 4
29 220 192 50 60 200 3
30 220 192 60 70 200 4
31 220 192 70 80 200 5
32 250 221 40 40 250 5
33 250 221 40 50 250 4
34 250 221 50 60 250 4
35 250 221 60 70 250 4
36 250 221 70 80 250 5

Straight brick

Number of brickDimensions, mmGroup of complication
  L S  H
  
37 250  80  100  3 
38 300 80 120 3
39 300 80 150 3
Limit deviations of brick dimensions (mm)
DimensionsLimit deviations, maximum for class
  MKRKU-45, MKRKP-45, MLKS-62, MLKU-62, MLKU-69, MKKS-72, MKKS-75, MKKS-90
Up to 100 mm inc. ±1
Over 100 to 300 mm inc. ±2
over 300 mm ±3
Number of brickDimensions, mmLimit deviations
KMKRU-45, KMKRU-50, KMKRU-55, ShKU, ShKU-32, MKRKU-45
1-4  а and а1 ±3
с +2
  -1
d ±2
2a, 2b a and a1 +2; -1
c ±3
d ±2
6-36 a, a1 and с ±3
b and b1 +2
  -1
37-39 а and с +3
  -2
b +2
  -1