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Stopper refractory products for steel teeming from ladle

Stopper refractory products

Stopper refractory products are used for steel teeming from ladle

Technical characteristics

 

Norm for mark

 

Stopper tubes

SHST-32

SHST-35

MLST-63

MKST-73

MKSTT-73

MKBST-75

GOST R 53066-2008

Mass fraction, %:

Al2O3, no less

Fe2O3, no more

 

32

-

 

35

-

 

63

1,3

 

73

1,1

 

73

1,5

 

75

2,2

Refractory property, °C, no low than

1690

1710

-

-

-

Open porosity, %, in the limit of:

- semidry pressing

- soft mud shaping

 

15-26

19-26

 

16-21

-

 

16-20

-

no more
24

-

 

17-22

-

Residual changes in the sizes during heating, %, no more than, at the temperature:

1350 °C

1400 °C

 

 

0,3

-

 

 

-

0,1

 

 

-

0,1

 

 

-

0,3

 

 

-

0,1

Thermal resistance, thermal cycling , no less

1

2

2

3

2

 

Norm for mark

 

Stopper pocket brick

SHSG-32

MLSG-62

GOST R 53066-2008

Mass fraction, %:

 

Al2O3 no less

32

over
62

Fe2O3, no more

-

1,5

Refractory property, °C, no low

1690

-

Open porosity, %, no more

23

24

Compressive resistance, N/mm2, no less

15

25

Onset temperature of softening, °C, no low

-

1450

Residual change in dimensions at the temperature 1500°C, no more

-

0,4

 

 

Norm for mark

 

Stopper head

SHSP-32

SHSP-34

GOST R 53066-2008

Mass fraction, %:

Al2O3, no less

 

32

 

34

Refractory property, °C, no low

1690

1710

Open porosity, %, in the limit of:

- semidry pressing

- soft mud shaping

 

15-20

18-23

 

15-20

18-22

Onset temperature of softening, °C, no low

- semidry pressing

- soft mud shaping

 

1320

1350

Thermal resistance, thermal cycling , no less

1

3

 

Norm for mark

 

Stopper nozzle

SHSS-32

SHSS -34

MLSS-62

GOST R 53066-2008

Mass fraction, %:

Al2O3, no less

Fe2O3, no more

 

32

-

 

34

-

 

over 62

1,5

Refractory property, °C, no low

1690

1710

-

Open porosity, %, no more

22

20

24

Onset temperature of softening, °C, no low

1350

-

 

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