Insulating fire brick

Description
Chinese Refractory raw material resources are abundant, which are suitable for the production of various grades of insulating firebrick. Limiting temperature of use range from 900¡æ to 1650¡æ.Each grade of insulating firebrick is formulated to meet specific thermal and physical requirements.
Top grade insulating firebrick are made from high-purity refractory clays, with graduated additions of alumina for the higher temperature products, and a carefully graded organic filler, which burns out during manufacture to give a controlled, uniform lacuna structure. Each brick machined to precise size on all six faces. The maximum continue use temperature depends on application.
 
Features
 
1. Low thermal conductivity
2. Low thermal capacitance
3. Low impurity content
4. High hot compressive strength
5. Accurate dimension
 
Typical application
 
Recommended for use as a primary hot face refractory lining or as back-up insulation behind other refractory in furnace, kilns, flues, refining vessels, heaters, regenerators, gas producers and main, soaking pits, annealing furnace, catalyst case and similar high temperature industrial equipment.
 
specification
 

      
          
      Items
 
 
Testing Temperature(¡æ)
When reheated with 2% contracting rate
Volume Density
g/cm3
Pressure Strength
Mpa
Thermal Conductivity
kcal/mh¡æ
(350¡æ)
A
A-1
900
¡Ü0.50
¡Ý0.50
¡Ü0.13
A-2
1000
¡Ü0.50
¡Ý0.50
¡Ü0.14
A-3
1100
¡Ü0.50
¡Ý0.50
¡Ü0.15
A-4
1200
¡Ü0.55
¡Ý0.80
¡Ü0.16
A-5
1300
¡Ü0.60
¡Ý0.80
¡Ü0.17
A-6
1400
¡Ü0.70
 ¡Ý1.00
¡Ü0.20
A-7
1500
¡Ü0.75
 ¡Ý1.00
¡Ü0.22
B
B-1
900
¡Ü0.70
 ¡Ý2.50
¡Ü0.17
B-2
1000
¡Ü0.70
 ¡Ý2.50
¡Ü0.18
B-3
1100
¡Ü0.75
 ¡Ý2.50
¡Ü0.20
B-4
1200
¡Ü0.80
 ¡Ý2.50
¡Ü0.22
B-5
1300
¡Ü0.80
 ¡Ý2.50
¡Ü0.23
B-6
1400
¡Ü0.90
 ¡Ý3.00
¡Ü0.27
B-7
1500
¡Ü1.00
 ¡Ý3.00
¡Ü0.31
C
C-1
1300
¡Ü1.10
 ¡Ý5.00
¡Ü0.30
C-2
1400
¡Ü1.20
 ¡Ý7.00
¡Ü0.38
C-3
1500
¡Ü1.25
  ¡Ý10.00
¡Ü0.45

 
 

Main property
 
 
Classify
temperature
 
¡æ
Apparent density
 
kg/m3
Chemical component Wgt %
Bending strength
 
Mpa
Cold crushing strength
 
Mpa
Al2 O3
%
SiO2
%
Fe2 O3
%
K2 O + Na2O
%
DM20
1100
550
45.00
50.00
1.00
 1.00
   0.70
0.80
DM23
1260
530
45.00
51.00
 0.80
  0.72
   0.70
1.00
DM25
1350
800
52.00
 41.55
 0.62
  0.81
  1.20
1.80
DM26
1430
780
59.00
37.00
 0.70
 0.70
  1.80
2.00
DM28
1540
880
64.00
32.00
 0.60
 0.60
   2.00
2.50
DM30
1600
1000
70.00
28.00
 0.33
  0.21
   2.00
3.00
JM23
1260
480
37.00
 44.40
 0.70
 1.10
  1.00
1.20
JM26
1430
800
58.00
 39.10
 0.70
 1.70
  1.50
1.60
JM28
1540
890
 67.10
31.00
 0.60
 0.90
  1.80
2.10
JM30
1650
1020
 73.40
 25.10
 0.50
 0.90
  2.10
2.20