Insulation Bricks-A

Technical Index :
GradeQualification	23AJM-1300		26AJM-1400		28AJM-1500		30AJM-1550		32AJM-1600
Type Item	A	B	A	B	A	B	A	B	A	B
Volume Density (g / cm3)	0.55	0.8	0.8	0.8	0.8	0.9	0.9	1.0	1.0	1.1
Tensile Strength (Mpa)	0.8	1.2	1.2;	1.3	1.5	1.8	1.8	2.0	1.9	2.1
Pressure Strength (Mpa)	1.0	1.8	1.8	2.0	2.5	3.0	3.0	4	4	4.5
Linear Change Rate After Heavy Firing (°C X 12h)	0.3	0.3	0.4	0.4	0.4	0.6	0.6	0.6	0.6	0.6
Thermal Conductivity 350°C (W / m o k)	0.15	0.25	0.26	0.26	0.26	0.33	0.33	0.38	0.38	0.43
AI2O3 > (%)	38	42	50	54	62	65	70	74	78	80
Fe2O3 < %)	1.0	1.0	1.0	0.9	0.8	0.7	0.9	0.6	0.5	0.4

Description :-

Light Weight Alumina Base Porous Bricks for insulation is made of high purity chamotte, by adding fillings of compound ash of aluminium oxide according to different types sintered with high temperature as a result mullite low thermal conductivity brick is directly compounded.

Advantages :

• High purity, low impurity substance.
• High temperature resistance, allow direct contact of fire, anti corrosion of various atmosphere.
• Low thermal conductivity, low thermal capacity.
• High strength, good heat shock resistant performance.
• Precise size, free cutting.

Application

• Roller kiln, tunnel kiln, Shuttle kiln, top hat kiln of ceramic industries, various resistor furnaces.
• Cracking furnaces, conversion furnaces, gas producer of chemical industry.
• Hot-air furnace, heating furnace, soaking furnace, heat treatment furnace of metallurgy industry.
• Refractory lining of hot surface for industrial furnace and back lining insulation layer for other refractory.

Insulation Bricks-B

Sr. NO.	PARTICULARS	LIGHT WEIGHT FIRE CLAY		PARTICULARS	PARTICULARS
		COLD FACE	HOT FACE	HFI**	HFK***
1	Service Temp Deg. C	N.A.	N.A.	1300	1400
2	Bulk Densitygm/cc	0.75-0.80	0.85-0.95	0.9	1.1
3	Apparent Porosity% Min.	70	65	60	65
4	Cold Compressive Strength Kg/cm²	15	18	15 - 20	40
5	Thermal conductivity in K.cal/m/hr/ºc (Max)	0.19	0.25	0.30-0.33	0.40-0.45
6	Parmannent Linear Change Temp Hrs % (Deg. C) (+/-)	(-) 1.5 AT 1000ºC	(-) 1.5 AT 1000ºC	1300,2,1	1400,2,1
7	Maximum Sage Working Temp. ºC Min.	1100	1200	N.A.	N.A.
8	P.C.E. min OC	N.A.	27	N.A.	N.A.
9	Al2O3 % Min.	28	28	30	40
10	SiO2% Min.	60	62	N.A.	N.A.
11	Fe2O3 % Max.	2	2	2	2

Note: available Lining Bricks of 40mm Height on request.