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General fire clay and high alumna brick for hot-blast stoves
Performance 		 

　　　Material



　　　　　Type


Performance

Silicate Fire clay High-alumina
RG-94 GGR-1.15(PSB) RN-40 RN-41 RN-42 RN-43 RL-65 RL-55 RL-48
Refractoriness ≧1710 ≧1670 ≧1730 ≧1750 ≧1750 ≧1690 ≧1790 ≧1770 ≧1750
Bulk density   ≦1.15   ≧2.15          
Apparent porosity ≦23 ≧50 ≦24

22

 ≦24   22 ≦24 ≦24
Cold crushing strength ≧35 ≧5

≧24.5

 ≧29.4 ≦24 ≧24.5 ≧49.0 ≧44.1 ≧39.2
Refractoriness under load     ≧1350   1400 ≧1350 1500 1470 1420
Permanent linear change on reheating 1450℃×2hr≦0.5 1550℃×2hr≦0.5 ≧1350

1450℃×2hr≦0.5

1450℃×2hr≦0.5     1500℃×2hr≦0.5 1500℃×2hr≦0.5
Creep rate 1550℃×2hr≦0.5 ≦1.3              
Heat expansion                  
SiO2% <1.5                

Fe2O2

                  

CaO%

                  
AL2O3 <1.0     >42 >42   >65 >55 >48
Application parts Wall, checker, combustion chamber, regenerator, wind mixing chamber, connecting main, combine brick, roof, bottom and burner.
 

Low greep high alumna brick for hot-blast stoves
Performance 		 

　　　　　Brand

Item		 Fire clay High-alumina Mullite Andalusite
    N43 N42 N41 HS H27 H26 H25 DRL-1 DRL-2 H24 H23 H22 H21 HZS
AL2O3% ≧42 ≧39 ≧40 ≧40 ≧42 ≧57 ≧50 ≧60 ≧65 ≧65 ≧65 ≧65 ≧65 ≧80 ≧75 ≧65
Refractoriness℃ ≧1750 ≧1730 ≧1730 ≧1730 ≧1750 ≧1790 ≧1770 ≧1790 ≧1790 ≧1790 ≧1820 ≧1820 ≧1850 ≧1850 ≧1850 ≧1790
Apparent porosity% ≦20 ≦22 ≦24 ≦24 ≦24 ≦20 ≦24 ≦24 ≦24 ≦24 ≦21 ≦23 ≦19 ≦21 ≦20 ≦24
Bulk density g/m3 ≧2.15 ≧2.10 ≧2.10 ≧2.15 ≧2.25 ≧2.40 ≧2.35 ≧2.40 ≧2.60   ≧2.40 ≧2.40 ≧2.45 ≧2.70 ≧2.60  
Cold crushing strength MPa ≧35 ≧35 ≧30 ≧30 ≧30 ≧40 ≧40 ≧40 ≧40 ≧49 ≧50 ≧45 ≧55 ≧45 ≧55 ≧49
Refractoriness under load T2 ≧1450 ≧1400 ≧1400 ≧1450 ≧1450 ≧1580 ≧1450 ≧1500 ≧1500 KD≧1500 KD≧1600 ≧1650 ≧1700 ≧1700 ≧1700 KD≧1500
Permanent linear change after heating %

1400℃×4h

+_0.2

1400℃×4h

+_0.2

1300℃×2h

+_0.2

1350℃×2h

+_0.2

1400℃×2h

+_0.2

1500℃×4h

+_0.2

1400℃×2h

+_0.2

1500℃×2h

+_0.1

1500℃×2h

+_0.1

1500℃×2h

+_0.1

1500℃×2h

+_0.1

1500℃×2h

+_0.1

1500℃×2h

+_0.1

1500℃×2h

+_0.1

1500℃×2h

+_0.1

 Resistance to thermal shock
Creep %

1250℃×(20-50)h

≦0.2

1200℃×(20-50)h

≦0.2

1150℃× h

≦0.8

1250℃×(20-50)h

≦0.8

1400℃×(20-50)h

≦0.2

1270℃×(20-50)h

≦0.2

1300℃ 50h

≦0.8

1350℃× 50h

≦0.8

1400℃× 50 h

≦0.8

1450℃× 50h

≦0.8

1450℃× 50h

≦1

1500℃×50h

≦0.8

1400℃×(20-50)h

≦1.0

1450℃×50h

≦1.0

1500℃×50h

≦0.8

1550℃×50h

≦0.8

1300℃×50h

≦1.0
Application  
 
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