SK-32 / SK-35Basic refractories
JMAS / JMHMagnesia spinel and hercynite brick
Basic refractory based on magnesia and synthetic spinel with high thermal-shock and corrosion resistance.
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PRODUCT / JMAS / JMH01 / APPLICATION
Application and operating zones
Transition and burning zones of rotary and shaft kilns, cement and lime production, non-ferrous metallurgy.
02 / TYPICAL DATA
Technical specifications
PropertyTypical value
MgO84-90%
Thermal shock @ 950°C100 cycles
RUL @ 0.2 MPa1680-1700°C
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 | Al₂O₃ | Fe₂O₃ | SiO₂ | CaO | Bulk density | Apparent porosity | Cold crushing strength | RUL @ 0.2 MPa | Thermal conductivity @ 1000°C |
|---|---|---|---|---|---|---|---|---|---|---|
| JMAS90 | 90% | 6% | 1.0% | 1.2% | 1.5% | 2.95 g/cm³ | 18% | 65 MPa | 1680°C | 2.9 W/mK |
| JMAS86 | 86% | 11% | 0.6% | 0.7% | 1.1% | 2.98 g/cm³ | 16% | 70 MPa | 1700°C | 2.8 W/mK |
| JMAS84 | 84% | 14% | 0.5% | 0.5% | 0.7% | 3.00 g/cm³ | 15% | 75 MPa | 1700°C | 2.8 W/mK |
| JMH90 | 89% | 4% | 4.0% | 1.2% | 1.5% | 2.95 g/cm³ | 17% | 60 MPa | 1700°C | 2.7 W/mK |
Properties are shown as typical values. The operating grade and guaranteed values are selected for the service conditions and fixed in the supply specification.
