PORRATH HIGH-TEMPERATURE INSULATING FIREBRICK

PORRATH HIGH-TEMPERATURE INSULATING FIREBRICK

PORRATH high-temperature insulating firebricks are available in ASTM Group 26 through 34 classifications and are manufactured with the highest quality raw materials and high firing temperatures. PORRATH IFB feature low thermal conductivity, excellent thermal shock resistance, high-purity, low iron oxide content, and good mechanical properties. PORRATH IFB exhibit excellent resistance to corrosive and/or reducing atmospheres. PORRATH is available in standard brick sizes (straights, arches, and wedges), as well as custom shapes.



PORRATH HIGH-TEMPERATURE INSULATING FIREBRICK
Properties Units FL 26-08 FL 28-09 FL 30-11 FL 32-12 L 33-13/2 FL33-16/2 FL 34-15
Classification Temperature °C
(°F)
2600
(1430)
2800
(1540)
3000
(1650)
3200
(1760)
3270
(1800)
3270
(1800)
3340
(1840)
Density lbs/ft³
(kg/m³)
49.9
(800)
56
(900)
68.7
(1100)
75
(1200)
81.2
(1300)
100
(1600)
93
(1500)
Cold Crush Strength Psi
(MPa)
580
(4)
580
(4)
725
(5)
870
(6)
1740
(12)
2175
(15)
1740
(12)
Permanent Linear Change - 12 hrs % -0.3 @
2570°F
-0.7 @
2750°F
-1.1 @
2950°F
+0.7 @
3150°F
+0.4 @
3272°F
+0.4 @
3272°F
-0.3 @
3272°F
Reversible Linear Thermal Expansion @ 1652°F % - 0.50 .56        
Thermal Shock Resistance DIN 51068 Cycles >15 >30 4   14    
Refractoriness
Under Load
DIN 51053 tₐ
Load 7.25psi
Load 14.5psi
°F (°C) 2552 (1400)
2840 (1560)
2894 (1590)   >3092 (>1700)
>3056 (>1680)
   
Creep @
0.2 Mpa (28.4psi)
Load & 1500°C
(2732°F)
Deformation
after 25 hrs e25
Creep Rate S25-15
% -
-
-
-
-
-
  0.22
0.004
   
Mean Specific Heat68°F & 752°F
68°F & 2192°F
Cal/
gm-C
(KJ/kg
K)
        0.23 (0.98)
0.27 (1.12)
   
Thermal
Conductivity
392°F (200°C)
752°F (400°C)
1112°F (600°C)
1472°F (800°C)
1832°F (1000°C)
2192°F (1200°C)
2552°F (1400°C)
BTUin/
hrft² °F
(W/mK)
-
-
2.44 (0.35)
2.58 (0.37)
2.79 (0.40)
2.99 (0.43)
-
-
-
2.51 (0.36)
2.65 (0.38)
2.86 (0.41)
3.14 (0.45)
-
-
-
3.07 (0.44)
3.21 (0.46)
3.55 (0.51)
4.04 (0.58)
-
-
-
4.6 (0.66)
4.7 (0.67)
4.9 (0.71)
5.3 (0.77)
6.0 (0.86)
-
-
7.88 (1.13)
8.09 (1.16)
8.29 (1.19)
8.57 (1.22)
-
-
-
8.1 (1.16)
8.2 (1.17)
8.3 (1.19)
8.6 (1.22)
-
-
-
9.7 (1.40)
9.2 (1.32)
9.2 (1.32)
11.0 (1.59)
-
Chemical Analysis
Al2O3
Si02
Fe203
CaO
% 54
42
1.1
0.2
63
33
0.8
0.3
74
25
0.3
0.2
78
21
0.2
0.1
91
8.0
0.2
-
91
8.1
0.2
-
>99.5
<0.20
0.04
0.08
Dimensional Tolerances>150 mm
(above 5.9")
<150 mm
(less than 5.9")
%
mm
±1

±1.5
±1

±1.5
±1

±1.5
  ±2

±3
   
Warpage % 0.75 0.75 0.75   2    
Mortar     Porrathin 30     Porrathin 34,
Porrathin 34 R
   

The above data is determined from typical production data on the standard size brick.

The data is subject to normal deviation and cannot be used for specific purposes.



PORRATH 33-13/2


Mullite Bonded Bubble Alumina

PORRATH 33-13/2 is a high-strength mullite bonded fine grain bubble alumina with a maximum use temperature of 3,272°F(1,800°C). PORRATH® 33-13/2 features include good thermal shock resistance and high-temperature strength.



PORRATH 33-13/2 CHEMICAL AND PHYSICAL DATA
Specification Data Specification Data
Maximum Temp. 1,800°C (3,272°F) Refractoriness
Under Load, T
Load
0.05 MPa
0.1 MPa
Temp.
1,700°C
1,680°C
Bulk Density 1.3 g/cm³
81 lbs/ft³
Creep At 1400°C
With 0.1 MPa Load
For 25hrs
%

%HR
0.22%

0.004%
Porosity 60%
Specific Heat
KJ/KG K

20/400°C
20/1,200°C
0.98
1.12
Thermal Expansion
Coefficient
8 x 10-6
@ 20 to 1,200°C
Thermal Shock Resistance
DIN 51068
20°C-950°C-20°C
14 Cycles
Thermal Conductivity
Hot Wire Method
1.13 W/mK @ 600°C
1.16 W/mK @ 800°C
1.19 W/mK @ 1,000°C
1.23 W/mK @ 1,200°C
Chemical Analysis
AL2O3
Si02
Fe203
Alkali
Oxides
91+ %
8.1%
0.2%
0.35%
Permanent Linear
Change at 1,800 °C, 12hrs
+ 0.4% Cold Crushing Strength 12.0 MPa 1740 psi

RECOMMENDED APPLICATIONS FOR PORRATH 33-13/2

  • Hot face linings for 1800°C gas and electric fired kilns in oxidizing environments

PORRATH 33-13/2 is available in brick, block, and shapes in many standard and custom sizes.



PORRATH 34-15


Fused Bubble Alumina

PORRATH 34-15 is a high-purity, high-strength alumina bonded bubble alumina with a maximum use temperature of 3350°F(1840°C). PORRATH 34-15 is very low in impurities that will cause discoloration and out-gassing, so the grade is recommended for use in very dry hydrogen atmospheres and corrosive environments.



PORRATH 34-15 CHEMICAL AND PHYSICAL DATA
Specification Data Specification Data
Maximum Temp. 1,840°C (3,350°F) Refractoriness
Under Load, T
Load
0.05 MPa
0.1 MPa
Temp.
1,700°C
1,680°C
Bulk Density 1.5 g/cm³ Creep At 1400°C
With 0.1 MPa Load
For 25hrs
e25

S25-15
0.80%

0.03%
Porosity 60%
Specific Heat
KJ/KG K

20/400°C
20/1,200°C
0.98
1.12
Thermal Expansion
Coefficient
8 x 10-6
@ 20 to 1,200°C
Thermal Shock Resistance
20°C-950°C-20°C
30 Cycles
Thermal Conductivity
Hot Wire Method
1.40 W/mK @ 600°C
1.32 W/mK @ 800°C
1.32 W/mK @ 1,000°C
1.59 W/mK @ 1,200°C
Chemical Analysis
AL2O3
Si02
Fe203
Alkali
Oxides
99.5+ %
< 0.2%
0.04%
0.1%
Permanent Linear
Change at 1,800 °C, 12hrs
- 0.3% Cold Crushing Strength 12.0 N/mm²

RECOMMENDED APPLICATIONS FOR PORRATH 34-15


  • Hot face linings for 1,800°C gas and electric fired kilns
  • >1,100°C in extremely reducing atmospheres (very dry H2, i.e. sintering translucent alumina, Tungsten and Molybdenum annealing, stainless steel PM)
  • Non-contact glass melting applications

PORRATH 34-15 is available in brick, block, and shapes in many standard and custom sizes.



INTERLOCKING KILN CAR BRICKS


Mortar-Free

Rath manufactures dimpled insulating bricks that can be used to construct kiln cars for firing applications up to 3300°F. The bricks are made in 13 standard sizes up to 13 ½ x 4 ½ x 4", including 2 flat top designs. Custom sizes can be fabricated as well. The bricks can be used alone or in combination with fiberboard or blankets to create low mass kiln cars with excellent thermal shock resistance. Typical applications include kiln cars for the firing of sanitary-ware, electronic ceramics and technical ceramics. Advantages include ease of assembly and maintenance and improved thermal shock resistance versus mortared kiln cars.

EXAMPLE OF STANDARD BRICK:

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