Thermal shock resistant clay bricks for hot blast furnaces
|
Index |
RN－42 |
HRN－42 |
HRN－48 |
|
Al2O3 % |
≥42 |
≥42 |
≥48 |
|
Fe2O3 % |
≤1.7 |
≤1.7 |
≤1.7 |
|
Fire resistance Refractoriness, ℃ |
≥1750 |
≥1750 |
≥1750 |
|
Bulk density BD ,g/cm3 |
≥2.15 |
≥2.15 |
≥2.35 |
|
Apparent porosity % |
≤24/23 |
≤24/21 |
≤24/21 |
|
Normal temperature compressive strength CSS, MPa |
≥30 |
≥40 |
≥40 |
|
Softening onset temperature at 0.2 MPa load RUL，℃ |
≥1400 |
≥1520 |
≥1550 |
|
Reburning line change rate PLC（%） |
0～-0.3 |
0～-0.3 |
0～-0.3 |
|
TSR ，（1100℃ water cooling）next Cycle |
≥20 |
≥30 |
≥40 |
|
Note:The denominator value refersto the date of check bricks |
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