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PN series of magnesia-chrome bricks are composite basic refractory products, made from magnesite and chromite burned at high temperature or ultra-high temperatures. The products show the features of excellent resistance against slag, high fired strength, good erosion resistance and thermal shock resistance. They can be applied in AOD/VOD refining furnace, DH/RH degassing device, and lining of nonferrous metal converter and cement kilns.
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Main properties MgO-Cr2O3 Bricks (1)
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| Brand | PN-8A | PN-8B | PN-12A | PN-12B | PN-16A | PN-16B | PN-20A | PN-20B | PN-22 |
| MgO (%);™ | 65 | 60 | 60 | 55 | 50 | 45 | 45 | 40 | 46 |
| Cr2O3 (%);™ | 8 | 8 | 12 | 12 | 16 | 16 | 20 | 20 | 22 |
| Apparent porosity (%);˜ | 20 | 20 | 20 | 20 | 20 | 23 | 20 | 23 | 20 |
| Cold crushing strength (MPa) ;™ | 35 | 30 | 35 | 30 | 35 | 30 | 35 | 30 | 35 |
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Main properties of MgO- Cr2O3 Bricks (2)
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| Brand | PN-H16A | PN-H16B | PN-H16C | PN-H20A | PN-H20B | PN-H20C |
| MgO (%);™ | 65 | 60 | 55 | 60 | 53 | 50 |
| Cr 2O3 (%);™ | 16 | 16 | 16 | 20 | 20 | 20 |
| Apparent porosity (%);˜ | 16 | 16 | 16 | 16 | 16 | 16 |
| Cold crushing strength (MPa) ;™ | 45 | 40 | 40 | 45 | 40 | 40 |
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Main properties MgO- Cr2O3 Bricks (3)
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| ó×ÏÊÓÔ×Á | Direct-combined MgO-Cr2O3 brick | Semi-recombined MgO-Cr2O3 brick |
| PN- | PN- | PN- | PN- | PN- | PN- | PN- | PN-16B | PN- | PN- | PN- | PN- | PN- | PN- |
| G4 | G6 | 8A | 8B | 12A | 12B | 16A | 18A | 18B | 16A | 16B | 20A | 20B |
| MgO (%);™ | >>80 | 75 | 74 | 74 | 66 | 66 | 60 | 60 | 58 | 58 | 60 | 60 | 55 | 55 |
| Cr2O3(%);™ | 4 | 6 | 8 | 8 | 12 | 12 | 16 | 16 | 18 | 18 | 16 | 16 | 20 | 20 |
| Apparent porosity (%);˜ | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 |
| Cold crushing strength (MPa) ;™ | 40 | 40 | 40 | 35 | 40 | 35 | 40 | 35 | 40 | 35 | 40 | 35 | 40 | 35 |
