LBK Insulating Firebrick

Home > Products > Insulation Firebrick > LBK Insulating Firebrick

LBK Series are world-class standard lightweight insulating firebricks.

As an insulating firebrick for inner-lining (hot face) and back-up lining (cold face), LBK Series feature the following properties:

① Lightweight

② Low thermal conductivity

③ Low heat storage capacity

④ Low reheat shrinkage

⑤ High thermal stability

⑥ Low Fe₂O₃ content (Good resistance against reducing atmosphere)

Various Annealing, Galvanizing, Heat-Treatment, Hot-Air and Naphtha Cracking Furnaces.

Product Name		LBK-20	LBK-23	LBK-26
Temperature (°C) at which Reheat Shrinkage does not exceed 0.5%		1200	1300	1400
Bulk Density		0.48	0.51	0.61
Cold Crushing Strength (MPa) JIS R 2615		1.4	2.0	2.9

Modulus of Rupture (MPa) JIS R 2619		1	1.2	1.4

Thermal Conductivity at 600°C (W/(m・K)) JIS R 2616		0.26	0.28	0.31
Reheat Shrinkage (%) at ( )°C×8h JIS R 2613:1985		0.03（1200）	0.19（1300）	0.14（1400）
Chemical Composition (%) JIS R 2216	Al₂O₃	41	43	57
	SiO₂	53	52	39
	Fe₂O₃	1.3	1.2	0.8

Product Name		LBK-28	LBK-30	LBK-3000
Temperature (°C) at which Reheat Shrinkage does not exceed 0.5%		1500	1550	1600
Bulk Density		0.70	0.82	0.81
Cold Crushing Strength (MPa) JIS R 2615		4.0	4.5	6.4
Modulus of Rupture (MPa) JIS R 2619		1.7	1.8	1.8
Thermal Conductivity at 600°C (W/(m・K)) JIS R 2616		0.36	0.43	0.45
Reheat Shrinkage (%) at ( )°C×8h JIS R 2613:1985		0.10（1500）	0.33（1550）	0.26（1600）
Chemical Composition (%) JIS R 2216	Al₂O₃	72	69	71
	SiO₂	26	30	28
	Fe₂O₃	0.6	0.4	0.4