Main Data

See also

Thermally Insulating Refractories

Thermally Insulating Refractories are used for laying of outside thermal insulating layer of various furnace elements.

Technical characteristics

 Rate for grade
  ShТ-0,7 ShТ-0,8 ShТ-0,9 ShТ-1,0 ShТ-1,3 ShTU-0,9 ShTU-1,0 ShTU-1,3
GOST 5040-2015

Mass fraction, %:

Al2O3, minimum

 

28
Apparent density, g/cm³, maximum 0,7 0,8 0,9 1,0 1,3 0,9 1,0 1,3
Compressive strength, N/mm², minimum 5,0 4,0 2,5 3,0 3,5 5,0 5,0 8,0

Residual variation of dimensions, %, maximum at:

1270 °C

1300 °C

1350 °C

 

-

1,0

-

 

-

1,0

-

 

1,0

-

-

 

-

1,0

-

 

-

1,0

-

 

-

1,0

-

 

-

1,0

-

 

-

-

1,0

Thermal conductivity, W/mk, maximum,at average temperature, °С

(350±25) °C

(650±25) °C

 

0,35

0,40

 

0,40

0,40

 

0,40

0,50

 

0,50

0,60

 

0,60

0,70

 

0,40

0,40

 

0,50

0,60

 

0,60

0,65
Classification temperature, °C - - 1400 1350 1350 1350 1400 1350



Upon agreement with the consumer, changes of guaranteed performances are possible.

 Rate for grade
  МКRТ-0,7 МКRTU-0,8 МLТ-1,0 МLТ-1,1 МLТ-1,3 МLТU-1,3 МКТ-1,3 КТ-1,3
GOST 5040-2015 

Mass fraction, %:

Al2O3, minimum

Fe2O3, maximum

SiO2, maximum

 

50

1,6

-

 

50

1,5

-

 

62

1,5

-

 

62

1,5

-

 

62

1,5

-

 

62

1,5

-

 

73

1,5

-

 

95

0,3

0,5
Apparent density, g/cm³, maximum 0,7 0,8 1,0 1,1  1,3 1,3 1,3 1,3
Compressive strength, N/mm², minimum 3,0 7,0 10,0 8,0 3,0 20,0 20,0 3,5

Residual variation of dimensions when heating,%, maximum at:

1400 °C

1500 °C

1550 °C

 

 

1,0

-

-

 

 

1,0

-

-

 

 

-

-

 1,0

 

 

-

-

 1,0

 

 

-

-

1,0

 

 

-

-

1,0

 

 

- 

-

1,0

 

 

-

0,8

-

Thermal conductivity, W/mk, maximum, at average temperature, °С

(350±25) °C

(650±25) °C

 

0,40

0,40

 

0,50

0,50

 

0,70

0,80 

 

0,55

0,60

 

0,50

0,60

 

0,80

0,80

 

0,70

0,80

 

0,80

0,80
Classification temperature, °C 1450 1450 - - 1550 1550 - -

The production according to the GOST R 52803-2007 rev.1 requirements is allowed.

Refractories are used for laying of outside thermal insulating layer of various furnace elements.