Mullite Insulating Brick

Product Introduction：
Mullite light-weight brick are made from good quality and super-pure raw materials,with strictly classified fillings according to their grades.These fillings can form a uniform  pore structure after burnt during the process of manufacture.Bulk Density  0.5~1.25g/cm'.Working temperatures range from 1000℃ to 1600℃.Each grade of products has unique design to meet different thermal, physicl and chemical demands.Each face of the brick is machined to the required accurate size.
 
Product Highlights:
- Low thermal conductivity: Hh series lightweight heat-insulating Bricks have an excellent feature of heat-insulation.
- Low heat capacity: Hh series lightweight heat-insulating bricks store very little heat because of their  characters of lightweight and low thermal conductivity,which causes good energy saving especially in batch operation.
- Low   content   of  impurities: Hh series lightweight heat-insulating bricks have high refractorieness with low content of iron and alkali-metal,High content of alumina enables them to maintain nice performances in reducing atmosphere.
- High hot compressive strength
- Accurate size
- The bricks can be processed into special shapes to avoid the joints and the number of bricks.

-Application:
Suitable for various industrial furnaces: Suspended ceiling,wall and heat insulation lining material of various  industrial  furnaces,suck  as  bell-type  furnace, heating furnace, cracking furnace, thermal treatment furnace, shuttle kiln,tunnel  furnace, roller kiln,enamel kiln,etc. Usage of Corundum Mullite Bricks: mainly used in key parts of kilns in industries such as steel, electronics, petrochemical, non-ferrous, refractory materials, etc.
 
Technical Data:  
                  

Mullite series Insulating Refractory Brick Physical and Chemical Character
Name		JM-23L	JM-23	JM-23HS	JM-25	JM-26	JM-26HS
Temperature (ASTM C155-97)	℃	1260	1260	1260	1350	1430	1430
	°F	2300	2300	2300	2500	2600	2600
Bulk density (ASTMC134-95)	g/cm3	0.5	0.6	0.67	0.8	0.8	0.9
	lb/ft3	31	37	42.00	50	50	56
Cold crushing strength (ASTMC133-97)	Mpa	1	1.2	2.1	2	2	4
	lb/in2	145	170	305	284	284	580
Cold Modulus of Rupture (ASTMC133-97)	Mpa	0.7	0.9	1.3	1.2	1.5	2.5
	lb/in2	101	128	189	170	218	362
Reheat linear change (ASTM C210-95)	%	0	0	-0.2	-0.3	-0.5	-0.5
	℃× 24hrs	1230	1230	1230	1350	1400	1400
Thermal Conductivity (W/m.k) (ASTMC182-88)	400℃	0.15	0.17	0.21	0.24	0.24	0.29
	600℃	0.17	0.19	0.25	0.28	0.27	0.32
	800℃	0.19	0.22	0.30	0.32	0.30	0.35
	1000℃	0.22	0.25	0.32	0.37	0.32	0.38
	1200℃	——	——	——	——	0.35	0.41
Chemical Character
Al2O3	%	45	45	45	50	55	55
Fe2O3	%	1.0	1.0	1.0	1.0	0.9	0.9
SiO2	%	50	50	50	45	42	42
K2O+Na2O	%	1.1	1.1	1.1	1.1	1.0	1.0

 

Mullite series insulating refractory brick
Properties Grand	Serial No.	Chemical Character			Bulk Density (g/cm3)	Reheat linear change	Clod crushing strength (MPa)	Cold Modulus of Rupture (MPa)	Thermal conductivity (350℃w/m.k)
		Al2O3	SiO2	Fe2O3
KDM-26	1	53	42.5	0.8	0.7	-0.9%	2.0	0.2	0.25
	2	53	41.5	0.8	0.8	-0.8%	2.5	1.4	0.27
	3	55	40.5	0.9	0.9	-0.7%	3.0	1.6	0.33
	4	55	40.5	0.9	1.0	-0.7%	3.5	1.8	0.37
KDM-23	5	42	54	1.3	0.5	1200℃×12h, -1%	1.0	0.9	0.16
	6	42	54	1.3	0.55	1200℃×12h,  -0.7%	1.3	1.0	0.17
	7	43	53	1.3	0.6	1250℃×12h, -0.7%	1.6	1.1	0.19
	8	45	52	1.0	0.8	1300℃×12h, -0.7%	2.0	1.4	0.27
	9	46	51	1.0	1.0	1300℃×12h, -0.8%	3.5	1.8	0.37

 

Corundum mullite lightweight brick
Item	Properties
Bulk Density(g/cm3)	1.5	1.6	1.7
Al2O3(%)	56	65	75
Fe2O3(%)	≤1	≤0.9	≤0.8
Linear change on reheating≤%	1450℃×12h	1550℃×12h	1550℃×12h
	-1~0	-1~0	-1~0
Cold crushing strength/MPa	5	11	15
Thermal conductivity W/m·k350℃±25	0.45	0.50	0.60

 

Mullite series insulating refractory brick
Item		Properties
		YDGM- 23	YDGM- 23	YDGM- 26	YDGM- 27	YDGM- 28	YDGM- 30
Al2O3	≥	45	45	55	60	65	73
Fe2O3	≤	0.6	1.0	0.9	0.8	0.7	0.6
Bulk Density	≤	0.65	0.80	0.8	0.90	1	1
Cold crushing strength	≥MPa	1.2	2.5	2.5	3.0	3.0	3.0
Heating permanent line change	Test Temperature	1250℃ *12h	1300℃ *12h	1400℃ *12h	1450℃ *12h	1510℃ *12h	1570℃ *12h
	%	-0.5~ 0.2	-0.5~ 0.2	-0.5~ 0.2	-0.5~ 0.2	-0.7～1	-0.7~1
Thermal Conductivity /[W/(m·k)]≤±25℃)	400	0.18	0.22	0.28	0.32	0.35	0.42
	600	0.20	0.28	0.30	0.34	0.37	0.44
	800	0.22	0.30	0.33	0.36	0.39	0.46

 
 

Mullite Light-weight Brick
Main Physical and Chemical Properties
Grand Properties	Hh23		Hh26		Hh28		Hh30	Hh32
Classification Temperature	1250		1350	1400	1450	1500	1550	1600
Bulk Density	500	600	800	800	900	1000	1000	1100
(MPa) Cold Crushing Strength	1.2	1.6	2.5	2.5	2.8	3.5	3.0	3.6
(MPa) Cold Modulus of Rupture	0.9	1.1	1.4	1.4	1.6	1.8	1.8	1.9
(℃×12h) ( %) Reheat linear change	1250	1250	1350	1400	1450	1500	1550	1600
	1250 -0.5	1250 -0.5	1350 -0.5	1400 -0.5	1450 -0.6	1500 -0.6	-0.7	1600 -0.7
(350℃) (w/m.k) Thermal conductivity	0.18	0.19	0.25	0.25	0.32	0.34	0.40	0.43
Al2O3    %	42	42	50	55	60	65	70	75
SiO2    %	54	54	47	42	37	32	28	23
Fe2O3     %	0.8	0.8	0.9	0.8	0.8	0.7	0.6	0.5

 

Grand Properties	B1	B5	B6	B7	CI	C2
Classification Temperature(kg/m3)	900	1300	1400	1500	1300	1400
Bulk Density(kg/m3)	650	800	900	1000	1100	1200
Cold Crushing Strength (MPa)	3.0	1.4	2.4	3.6	4.4	5.7
Cold Modulus of Rupture (MPa)	1.5	0.8	1.8	2.0	2.2	2.4
Liner change on reheating (℃×4h)(%)	-900	-1300	-1400	-1500	-1300	-1400
	0.68	0.3	0.6	0.9	0.7	0.8
Al2O3(%)	12	41	41	62	40	41
Fe2O (%)	4.2	1.2	1.4	0.9	1.2	1.2