Origin	China
Model Number	OJM20,OJM23,OJM26,OJM28,OJM30 ;DJM23,DJM26,DJM28
Brand Name	oreworld

Generally speaking, the volume density for light weight fire clay brick is between 0.4-1.5 g/cm3, porosity is from 66% to 73%, compressive strength is 1.5-8.1 MPa and thermal conductivity rate is 0.291-0.582 W / (Mk) (350 ℃ ).
Light weight fire clay brick is used in high temperature insulation layer of furnace that has high refractoriness and good thermal shock resistance. High quality of high alumina insulation bricks can be used as the linings that directly contact the fire however it can not be used in the place where eroded by slag directly. Because the high alumina insulation brick is of good stability under reduction condition it is widely used as the inner insulation layer in the furnace that protected by hydrogen or carbon monoxide atmosphere. Its working temperature is 1350~1500℃ and working temperature is 1650~1800 ℃ for high pure alumina bricks.
In Chinese national standards, it is classified into seven grades such asLG-1.0, LG-0.9, 0.8 and etc according to the volume density.

Item	Index
	NG- 1.5	NG- 1.3a	NG- 1.3b	NG- 1.0	NG- 0.9	NG- 0.8	NG- 0.7	NG- 0.6	NG- 0.5	NG -0.4
Bulk density g/cm3,≤	1.5	1.3	1.3	1.0	0.9	0.8	0.7	0.6	0.5	0.4
Compress strength MPa	≥5.9	≥4.4	≥3.9	≥2.9	≥2.5	≥2. 5	≥2.0	≥1.5	≥1.2	≥1.0
Testing temperature when reheated with 2% contracting rate ℃	1400	1400	1350	1350	1300	1250	1250	1200	1150	1150
Thermal conductivity , W/m·Kï¼Âˆ350℃±25℃ï¼Â‰	≤0.7	≤0.6	≤0.6	≤0.5	≤0.4	≤0.35	≤0.35	≤0.25	≤0.25	≤0.2

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website:http://www.oreworld.com