Mullite Insulating Brick

Name:	Mullite Insulating Brick

Refractoriness ≥ ℃: 1550
Al2O3 %: 42-73
SiO2 %: 24-55
Bulk density g/cm³: 0.6-1.0

Product Description

Introduction

SaTradeCo. Refractory provide customized products with special grade mullite (3Al2O3•2SiO2) as
the major crystal phase, firing with poly-light ball by research according to actual service condition.
It is used under the temperature can reach 1350~1700℃, can contact flame directly. Al2O3 is normally
65~75%.

Application

Mullite insulating brick can be used in high temperature kiln lining. Currently, it is widely used roof of hot-blast furnace,
body and bottom of blast furnace, regenerative chamber of glass melting furnace, ceramic kiln, blind angle furnace lining
of petroleum cracking system, shuttle kiln, roller kiln, linings of glass and petrochemical engineering furnaces.

Physical and Chemical Index

Item	JM23	JM 26	JM28	JM 30
Chemical Composition (%)
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
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 (%) 1000°C	0.5	0.52	0.52	0.53
Thermal Conductivity (W/m.k)
350°C	0.18	0.25	0.33	0.38
400°C	0.20	0.29	0.35	0.40
600°C	0.24	0.32	0.37	0.42