General refractory bricks for carbon roasting furnace
Item |
Unit |
N-1 |
N-2a |
LZ-75 |
LZ-65 |
LZ-55 |
|
Al2O3 |
% |
≥42 |
≥42 |
≥75 |
≥65 |
≥55 |
|
Fe2O3 |
% |
|
|
|
|
|
|
Apparent porosity ,AP |
% |
|
|
|
|
|
|
Normal temperature compressive strength ,CCS |
Mpa |
≥30 |
≥25 |
≥53.9 |
≥49 |
≥44.1 |
|
Softening onset temperature at 0.2 MPa load,RUL |
℃ |
≥1400 |
≥1350 |
≥1520 |
≥1500 |
≥1470 |
|
Reburning line change rate PLC |
1500℃×2h |
% |
|
|
0.1~-0.4 |
0.1~-0.4 |
0.1~-0.4 |
1400℃×2h |
0.1~-0.4 |
0.1~-0.5 |
|
|
|
||
Fire resistance |
℃ |
≥1750 |
≥1730 |
≥1790 |
≥1790 |
≥1770 |
Relevant case
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