Burned microporous alumina-graphite bricks are made of dense corundum, super-grade bauxite clinker, high-temperature electrically calcined anthracite, graphite, and silicon carbide as the main raw materials. Add the phenolic resin as a binder and adopt the micropore generation process. The bricks are fired in a high-temperature reducing atmosphere after being formed.
Burned microporous alumina-graphite bricks are suitable for the middle and lower parts of large blast furnaces, furnace waist, furnace belly, furnace hearth and furnace bottom.
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Performance Characters:
|
Item/Grade |
WLT-1 |
WLT-2 |
|
|
Al2O3 % |
≥65 |
≥60 |
|
|
C % |
≥11 |
≥11 |
|
|
Apparent porosity； % |
≤16 |
≤17 |
|
|
Bulk density； g/cm3 |
≥2.85 |
≥2.65 |
|
|
Cold crushing strength； Mpa |
≥70 |
≥60 |
|
|
Molten iron corrosion index； % |
≤2 |
≤3 |
|
|
Thermal conductivity （W/（m·K））
|
Room temperature |
≥16 |
≥16 |
|
300℃ |
≥15 |
≥15 |
|
|
600℃ |
≥14 |
≥14 |
|
|
800℃ |
≥13 |
≥13 |
|
|
Alkali-resistance； % |
≤10 |
≤10 |
|
|
＜1μm pore volume； % |
≥80 |
≥70 |
|
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