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  Clay Bricks
 

Clay bricks use Chamotte that the fire clay is calcinated as the main material. These bricks consist of fire clay and binder. The chemical components of these bricks are SiO2 and Al2O3. (Al2O3=25~40%) fireclay bricks are cheap so that they are used for all kinds of industrial furnaces.

The main applications are the low temperature parts such as blast furnaces and hot blast furnaces, waste incinerators and glass melting furnaces. Due to the scale-up of a variety of industrial furnaces and severity of operating conditions, super dense clay bricks that made of more refined chamotte being calcinated at high temperature are applied more than before.
 
 
Specifications:

 

Item
General clay firebricks
Firebricks for blast furnace
Firebricks for hot-blast stove
Firebricks for pouring
Firebricks for the lining of temming ladle
Firebricks for steel pouring
Low pore firebricks
Brand
   N-2a
   N-42
   RN-42
  JZN-40
  CN-40
 
   DN-40
Al2O3,  %    min
   42
    42
   42
    40
     40
   40
   42
Fe2O3, % max
--
   1.7
    --
    --
     --
    --
    --
Refractoriness
(℃) min
  1730
  1750
  1750
   1710
   1730
   1710
   1730
Refractoriness under load of 0.2Mpa(℃) min
  1350
  1430
  1400
   --
   1400
  1370
(SN-40, KN-40)
   1390
Apparent porosity, % max
    24
    16
    24
   17-25
     19
15-23 (SN-40)
22 (KN-40)
15-25(XN-40)
23(ZN-40)
     15
Linear change on reburning, %  
  +0.1
  -0.5
1400℃X 2h
     0
  -0.3
1450℃ X 2h
     0
  -0.4
1450℃X 2h
+0.1
-0.3 
1350℃ X 2h
     0
  -0.3
1400℃ X 2h
    0
  -0.3
1350℃ X 2h  
(XN-40)
  +0.1
  -0.3
1400℃ X 2h
Cold crushing strength   MPa      min
   25
   49.0
    29.4
   --
   34.3
  19.6
(ZN-40)
   39