1、Shaped refractory material for iron-making system
Silicate series alumina shaped product for hot blast stove

AL2O3% Refracto-riness
℃ Apparent porosity
% Cold compressive strength Reheat-ing
linear change Initial softening point under load 0.2MPa×50h
Creep rate not more than
Fire clay bricks for hot blast heater RN-42 ≥42 ﹥1760 ≤24 ≥30 1450℃×2h
0～-0.4 ≥1400
RN-40 ≥40 ﹥1740 ≤24 ≥25 1350℃×2h
0～-0.3 ≥1350
RN-36 ≥36 ﹥1700 ≤26 ≥25 1350℃×2h
0～-0.5 ≥1300
High alumina bricks for hot blast heater RL-65 ≥65 ﹥1790 ≤22(24) ≥50 1500℃×2h
0～-0.4 ≥1500
RL-55 ≥55 ﹥1770 ≤22(24) ≥45 1500℃×2h
0～-0.4 ≥1470
RL-48 ≥48 ﹥1750 ≤22(24) ≥40 1450℃×2h
0～-0.4 ≥1420
Low creep fire day bricks for hot balst heater DRN-130 ≥48 ﹥1760 ≤20(23) ≥60 1400℃×2h
±0.2 ≥1520 1300℃
≤0.8
DRN-125 ≥45 ﹥1750 ≤20(23) ≥60 1400℃×2h
±0.2 ≥1500 1250℃
≤0.8
Low creep high alumina bricks for hot blast heater DRL-135 ≥65 ﹥1790 ≤20(23) ≥70 1450℃×2h
0～-0.4 ≥1550 1350℃
≤0.8
DRL-140 ≥65 ﹥1790 ≤19(23) ≥75 1450℃×2h
0.2～0.1 ≥1600 1400℃
≤0.8
DRL-145 ≥70 ﹥1790 ≤19(23) ≥80 1500℃×2h
0.2～0.1 ≥1650 1450℃
≤0.8
DRL-150 ≥75 ﹥1790 ≤18(23) ≥85 1500℃×2h
0.2～0.1 ≥1700 1500℃
≤0.8





Refractory ball for hot blast stove

AL2O3% Fe2O3% Apparent ponosity Refract-oriness Bulk density
g/cm3 Cold compressive strength Reheating linear change Initial softening point under load
Fireclay ≥48 ≤2.0 ≤23 >1790 ≥2.1 ≥10000 -0.4～-0.2 ≥1400
High-strength high-
Alumina ≥65 ≤1.5 ≤23 >1790 ≥2.2 ≥12000 -0.4～-0.1 ≥1480
Mullite ≥75 ≤1.0 ≤22 >1790 ≥2.4 ≥19000 0.1～0.2 ≥1550
High-intensive high-
Density high-alumina ≥75 ≤1.5 ≤23 >1790 ≥2.55 ≥20000 0.1～0.3 ≥1480
Low creep high-alumina 65# ≥65 ≤1.5 ≤22 >1790 ≥2.60 ≥12000 0.1～0.2 ≥1490
75# ≥75 ≤1.5 ≤21 >1790 ≥2.65 ≥15000 0.1～0.2 ≥1500
80# ≥80 ≤1.0 ≤20 >1790 ≥2.65 ≥15000 0.1～0.2 ≥1520
Alumel-zirconium LZ-5 ≥65 ZrO2≥5 ≤22 >1790 ≥2.60 ≥14000 0.1～0.3 ≥1500
LZ-8 ≥70 ZrO2≥8 ≤22 >1790 ≥2.65 ≥15000 0.1～0.3 ≥1520
Silicon SiO2≥95 ≤23 >1790 ≥2.4 ≥12000 1000℃ thermal expansion porosity ≤0.9%
1500℃thermal expansion porosity ≤1.2%

Aluminum silicate series of shaped product for blast furnace

AL2O3% Fe2O3% Refractor-
iness
℃ Apparent psnosity
% MPa cold compressive strength 1450℃×2h
Reheating linear change % 0.2MPa the start refractoriness under load
Phosphoric acid dipped clay brick ≥45 ≤1.8 - ≤14 ≥60 -0.2～0 ≥1450
Notes:the element of P2O5 is more than 7%
Clay brick for blast furnace ZGN-42 ≥42 ≤1.6 >1760 ≤15 ≥60 0～0.2 ≥1450
GN-42 ≥042 ≤1.7 >1760 ≤16 ≥50 0～0.3 ≥1430
High-alumina for blast furnace GL-65 ≥65 ≤2.0 >1790 ≤19 ≥60 1500℃×2h
0～0.2 ≥1500
GL-55 ≥55 ≤2.0 >1780 ≤19 ≥50 1500℃×2h
0～0.2 ≥1480
GL-48 ≥48 ≤2.0 >1760 ≤18 ≥50 1450℃×2h
0～0.2 ≥1450