Alumina-Carbon Brick Series

Update: 2015/11/15      View:
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Introduction

The product is made by adopting special grade bauxite clinker, corundum and graphite as main raw materials, adding several kinds of super fine powder as additives, featuring micropore structure, good alkali resistance and high thermal conductivity. It is used for lining of bosh, belly and cooling wall of large and middle sized blast furnaces. 

Index
Item
Sintered micropore Al2O3-C bricks
Burned Al2O3-C bricks
Unburned Al2O3-C bricks
WLT-1
WLT-2
WLT-3
Al2O3 , %
≥65
≥60
≥55
60
60
C , %
≥11
≥11
≥9
≥12
≥30
SiC , %
/
/
/
5
Fe2O3 , %
≤1.5
≤1.5
≤1.5
≤1.5
/
Bulk density , g/cm3
≥2.85
≥2.65
≥2.55
≥2.70
≥2.90
Apparent porosity ,%
≤16
≤17
≤18
≤13
≤5
Common compressive strength , MPa
≥70
≥60
≥50
≥60
≥45
0.2Mpa Refractoriness under load , ℃
≥1650
≥1650
≥1600
≥1650
≥1700
Thermal shock resistance (1100 ℃ Water cooling ) , cycle
≥100
≥100
≥100
≥50
/
Corrosion index to hot metal (1100℃), %
≤2
≤3
≤4
/
/
Permeability
≤0.5
≤2
≤2
/
/
Average pore size , μm
≤0.5
≤1
≤1
/
/
<1μm  Pore volume , %
≥80
≥70
≥70
/
/
Alkali resistance
(Strength loss), %
≤10
≤10
≤15
/
/
Thermal conductivity (0~800℃) , W/m.k
≥13
≥13
≥13
/
/

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