Pre-masonry bricks for blast furnaces and Hot-air furnaces-Zhengzhou Sunrise Technology CO.,LTD

$Sunrise Refractory.$

$Refractory$

Pre-masonry bricks for blast furnaces and Hot-air furnaces

Physical and chemical index :

	N-H21	N-H22	N-H23	N-H24	N-H26	N-H27	N-H231	N-HSPC	DN-A13
Al₂O₃ ％	≥75	≥80	≥65	≥65	≥60	≥50	≥65	≥50
Fe₂O₃ ％	≤1.00	≤1.00	≤1.00	≤1.00	≤1.00	≤1.00	≤1.00	≤2.00
Apparent Porosity ％	≤20	≤21	≤19	≤23	≤23	≤23	≤20	≤24
Bulk Density g/cm³	≥2.60	≥2.70	≥2.45	≥2.40	≥2.30	≥2.30	≥2.40	≥2.2	≥0.8
Cold Crushing Strength Mpa	≥55	≥45	≥55	≥45	≥40	≥40	≥60	≥40	≥1
Refractoriness ℃	≥1850	≥1850	≥1850	≥1820	≥1790	≥1770	≥1790
Reheat liner change (3h)　％	1550℃ ±0.2	1550℃ ±0.2	1450℃ ±0.2	1400℃ ±0.2	1300℃ ±0.2	1270℃ ±0.2	1450℃ ±0.2
Creep 0.2 Mpa(50h)　％	(1550℃) ≤0.8	(1500℃) ≤0.8	(1450℃) ≤1.0	(1400℃) ≤0.8	(1300℃) ≤0.8	(1270℃) ≤0.8	(1450℃) ≤0.7
Thermal Shock Resistances cycles							(1100℃) ≥30	(1200℃) ≥20
Reheat liner change 2h　％							(1300℃) ≤0.8		(1500℃) ≤0.5
Thermal linear expansion　％								(1300℃) ≤0.8
Thermal conductivity w/n℃									(350℃) ≤0.27
Bending strength MPa									≥10

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