Blast furnace clay bricks
|
Item |
Unit |
ZGN－42 |
GN－42 |
|
|
Al2O3 ≥ |
% |
42 |
42 |
|
|
Fe2O3 ≤ |
% |
1.6 |
1.7 |
|
|
Apparent porosity ≤ |
% |
15 |
16 |
|
|
Normal temperature compressive strength ≥ |
Mpa |
58.8 |
49 |
|
|
Softening onset temperature at 0.2 MPa load ≥ |
℃ |
1450 |
1430 |
|
|
Reburning line change rate |
1450℃×2ｈ |
% |
+0— -0.2 |
+0— -0.3 |
|
Fire resistance ≥ |
℃ |
1750 |
1750 |
|
|
Air permeability |
mDa |
Must be tested |
Must be tested |
|
Relevant case
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