Secondary high-alumina axe-shaped brick is a refractory material made of high-alumina bauxite as the main raw material, with the main component being alumina (Al₂O₃) with a content of not less than 65%.
It is made by using different grades of bauxite clinker and formula binder, and then formed and fired at high temperature. Secondary high-alumina axe-shaped brick has good refractory performance and corrosion resistance, and is suitable for high-temperature furnaces and other environments.
(1) High refractoriness
(2) High refractoriness under load
(3) High slag resistance
(4) High flexural strength
(5) Good thermal shock resistance
(1) Blast furnace
(2) Hot blast furnace
(3) Boiler
(4) Cement kiln
(5) Steel smelting
(6) Glass kiln
(7) Ceramic kiln
(8) Arch structure
(9) Open hearth heat storage checker brick
(10) Casting system
|
Item |
Index |
||||
|
Model |
SK35 |
SK36 |
SK37 |
SK38 |
SK39 |
|
Al2O3/% |
≥48 |
≥55 |
≥65 |
≥75 |
≥80 |
|
Fe2O3/% |
≤2 |
≤2 |
≤2 |
≤2 |
≤2 |
|
Body density（g/cm3） |
2.15 |
2.2 |
2.3 |
2.4 |
2.5 |
|
Refractory |
≥1750 °C |
≥1770 °C |
≥1790 °C |
≥1790 °C |
≥1790 °C |
|
Change in heating permanent line/% |
1450℃×2h -0.4~0.1 |
1450℃×2h -0.4~0.1 |
1450℃×2h -0.4~0.1 |
1500℃×2h -0.4~0.2 |
1500℃×2h -0.4~0.2 |
|
Cold pressing strength |
≥39Mpa |
≥44Mpa |
≥49Mpa |
≥54Mpa |
≥65Mpa |
|
Apparent porosity (≤) |
≤22% |
≤22% |
≤23% |
≤23% |
≤21% |
|
Load softening temperature [0.2MPa*0.6%]≥ |
≥1420 °C |
≥1470 °C |
≥1500 °C |
≥1520 °C |
≥1530 °C |
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