Coke oven refractory bricks

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Coke oven refractory bricks

Brand Item	Fire-clay		Mullite-fire-clay
	QN-53	QN3	MNA	MNB
AL₂O₃%	≧42	≧40	≧50	≧55
Fe2O3 %	≦1.6		≦1.3	≦1.3
Refractoriness ℃	≧1750	≧1730	≧1750	≧1750
Apparent Porosity %	≦16	≦24	≦22	≦20
Cold crushing strength Mpa	≧58.8	≧24.5	≧50	≧65
Bulk density g/cm3			≧2.30
Resistance to thermal shock(1100℃ water cooling)times no spalling	spalling resistance ≧10 times		≧25	≧18
Permanent lenear change or reheating %	1450℃×3h 0~-0.2	1400℃×2h +0.1~-0.5	1300℃×2h +_0.1	1300℃×2h +_0.1
Modulus of rupture (1100 ℃.0.5h ) Mpa			≧5	≧9
Application	Coke quench furnace