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Hot air furnace with high alumina bricks

Product details

Project \ grades	RDL127A	RDL130A	RDL135A	RDL140A	RDL145A	RDL150A	RDL155A
Al ₂ O _3%	≥ 48	≥ 50	≥ 55	≥ 60	≥ 65	≥ 70	≥ 75
Fe ₂ O _3%	≤ 1.3	≤ 1.2	≤ 1.2	≤ 1.1	≤ 1.0	≤ 0.8	≤ 0.6
TiO2%	≤ 1.5	≤ 1.4	≤ 1.2	≤ 1.2	≤ 1.0	≤ 0.8	≤ 0.6
Apparent porosity%	≤ 18 (19)	≤ 18	≤ 18 (20)	≤ 19 (21)	≤ 19 (21)	≤ 19 (21)	≤ 19 (21)
The bulk density g / cm ³	≥ 2.25 (2.22)	≥ 2.3 (2.25)	≥ 2.35 (2.30)	≥ 2.40 (2.35)	≥ 2.50 (2.45)	≥ 2.55	≥ 2.6
Cold crushing strength Mpa	≥ 40 (35)	≥ 45 (40)	≥ 45 (40)	≥ 45 (40)	≥ 50 (45)	≥ 55	≥ 55
Load softening temperature (0.2Mpa) t0.5	≥ 1450	≥ 1480	≥ 1550	≥ 1580	≥ 1600	≥ 1650	≥ 1650
Reheating linear change%	1450 ℃ × 2h ± 0.2	1350 ℃ × 4h ± 0.2	1400 ℃ × 4h ± 0.2	1400 ℃ × 4h ± 0.2	1500 ℃ × 4h ± 0.2	1500 ℃ × 4h ± 0.2	1500 ℃ × 4h ± 0.2
The 0.2Mpa creep% (20 - 50h)	1270 ℃ ≤ 0.2	1300 ℃ ≤ 0.2	1350 ℃ ≤ 0.2	1400 ℃ ≤ 0.2	1450 ℃ ≤ 0.2	1500 ℃ ≤ 0.2	1550 ℃ ≤ 0.2

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