Working liner insulation layer, especially suitable for complex shape, limited position, requiring integrity, air tightness, high strength kiln lining and local section.
Thermal insulation refractory castable has small volume density, large porosity and low thermal conductivity, and is mostly used in the thermal insulation layer (non-working layer) of industrial kilns in the specific heat capacity project, but it can also be used in the construction working layer for the furnace lining with low refractories.
The furnace lining constructed with insulation castable has remarkable energy-saving effect, and can make the working lining thinner, reduce, environmental protection and energy saving, which is conducive to short shrinkage heat time and uniform furnace temperature
1.low thermal conductivity: especially at high temperature, low thermal conductivity, good thermal insulation performance.
2.good thermal shock resistance: in the use of temperature range, the brick does not deform, do not flake.
3.according to the different uses, the selection of reasonable mechanical strength, so that the light performance is good.
4.higher load softening temperature and smaller reburning rate, compared with similar material light firebrick, higher temperature, longer life, safer.
Used for lining blast furnaces, hot blast furnaces, electric furnace roofs, oxygen converters, reverberatory furnaces, and rotary kilns. They are also widely used as regenerative flat furnace checker bricks, plugs for pouring systems, and water mouth bricks, among other applications.
|
Name |
Grade I |
Grade 2 |
Grade 3 |
Special |
|
model |
LZ-75 |
LZ-65 |
LZ-55 |
LZ-82 |
|
AL2O3 %≥ |
75 |
65 |
55 |
82 |
|
Fe203 % < |
2.5 |
2.5 |
2.6 |
2.0 |
|
Bulk Density g/cm2 |
2.5 |
2.4 |
2.3 |
2.6 |
|
Cold Crushing Strength（MPa ≥） |
70 |
60 |
50 |
80 |
|
Refractoriness under load at 0.2Mpa(℃) |
1510 |
1460 |
1420 |
1550 |
|
Refractoriness（℃ ≥） |
1790 |
1770 |
1770 |
1770 |
|
Apparent porosity （% ≤） |
22 |
23 |
24 |
21 |
|
Linear Change Rate % |
-0.3 |
-0.4 |
-0.4 |
-0.2 |
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