SK-36 / SK-40Steelmaking refractories
JEF / JLF / JBFMagnesia carbon brick
Resin-bonded magnesia-graphite brick with high resistance to thermal shock, oxidation, slag and molten metal.
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PRODUCT / JEF / JLF / JBF01 / APPLICATION
Application and operating zones
Working linings of EAFs, BOFs and steel ladles: slag lines, hot spots, bottoms, cones and purging zones.
02 / TYPICAL DATA
Technical specifications
PropertyTypical value
MgO83-90%
Fixed carbon8-14%
Cold crushing strength40-45 MPa
GRADE COMPARISON
Grades and technical properties
For each shipment, composition, geometry, and guaranteed properties are fixed in the specification and batch quality certificate.
| Grade | MgO | Fixed carbon | Apparent porosity | Bulk density | Cold crushing strength | HMOR @ 1400°C | Application zone |
|---|---|---|---|---|---|---|---|
| JEF12SL | 85% | 12% | 3% | 3.05 g/cm³ | 40 MPa | 12 MPa | EAF slag line |
| JEF14HS | 83% | 14% | 3% | 3.10 g/cm³ | 40 MPa | 12 MPa | EAF hot spot |
| JEF12CS | 85% | 12% | 3% | 3.05 g/cm³ | 42 MPa | 12 MPa | EAF cold spot |
| JEF14DE | 83% | 14% | 3% | 3.10 g/cm³ | 42 MPa | 12 MPa | EAF door end |
| JLF8BI | 90% | 8% | 2% | 3.00 g/cm³ | 45 MPa | 8 MPa | Ladle bottom impact |
| JLF8BN | 90% | 8% | 2% | 3.00 g/cm³ | 45 MPa | 6 MPa | Ladle bottom |
| JLF10BC | 88% | 10% | 2% | 3.00 g/cm³ | 45 MPa | 8 MPa | Ladle cone/splash |
| JBF10BI | 86% | 10% | 3% | 3.00 g/cm³ | 45 MPa | 12 MPa | BOF bottom pad |
| JBF10LC | 84% | 12% | 3% | 3.05 g/cm³ | 45 MPa | 12 MPa | BOF lower cone |
| JBF14BL | 83% | 14% | 3% | 3.10 g/cm³ | 45 MPa | 10 MPa | BOF barrel |
Properties are shown as typical values. The operating grade and guaranteed values are selected for the service conditions and fixed in the supply specification.
