SIJIHUO REFRACTORY specialized in manufacturing refractory materials about 20years in China, Our products mainly include refractory bricks, refractory castable, refractory precast shapes, insulating brick etc. for refractory castable and precast shape they are very popular in the Europe, North American area.
  
Advantage:High purity alumina bricks, high strength refractory castable, fused corundum. the products have the properties of bearing high temperature, high refractoriness under load and good resistance.
 
Choices:We can supply High Alumina Bricks, Fireclay Bricks, Low Porosity Fireclay Bricks, Mullite Bricks, Corundum Bricks, AZS Bricks, Magnesite Bricks, Zircon Bricks,insulating Bricks etc.
 
Application:They are widely used in the basic zone of metallurgical furnaces, nonferrous furnaces and regenerator of glass furnace
 
 Technical data of insultion bricks

Brand	Grade 23	Grade 26	Grade 28	Grade 30
Physical &Chemical index
Al2O3	42	56	67	73
SiO2	55	41	30	24
Fe2O3	1	0.8	0.7	0.7
K2O + Na2O	1.1	1.7	1.7	1.7
Physical Properties
Density(kg/m3)	600	800	900	1000
Classification Temperature(C)	1300	1400	1500	1550
Cold Crushing Strength(MPa)	1.2	1.8	2.5	3.3
Modulus of Rupture(MPa)	1.0	1.7	2.3	3.1
Permanent Linear Change(%) X 24hrs	0.6	0.6	0.8	0.9
Thermal Expansion(%)1000C	0.5	0.52	0.52	0.53
Thermal Conductivity(W/m.K)
350C	0.18	0.25	0.33	0.38
400C	0.20	0.29	0.35	0.40
600C	0.24	0.32	0.37	0.42