Magnesia chrome products
High refractory magnesia chrome products are used for masonry vaults of steel-making furnaces (GB 10888-93), magnesia chrome products are used for lining of rotary kilns in cement and other industries (GB 21436-2004) and magnesia chrome products made of rich magnesite are used for lining of electric arc steel furnaces (GB 28468-90).
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Description
| Index item | Specification standard | |||||||
| PCSP | PKHSUT | PKHSU | PKHSS | PKHSST | PKHC | PKHD-72 | PKHD-67 | |
| GB code | 10888-93 | 21436-2004 | 28468-90 | |||||
| Mass fraction,% | ||||||||
| Cr2O3 | 7-15 | 7-15 | 7-15 | 7-15 | 7-18 | 8-18 | 7-15 | 7-15 |
| MgO, ＞ | 70 | 70 | 65 | 65 | 65 | 65 | 72 | 67 |
| Compressive strength，N/мм2, ＞ | 37,5 | 35,0 | 32,5 | 27,5 | 25,0 | 25 | 40 | 33 |
| Apparent porosity , %,＜ | 16 | 18 | 20 | 22 | 22 | 24 | 16 | 20 |
| Initial temperature，℃，＞ | 1560 | 1540 | 1540 | 1520 | 1500 | 1500 | 1570 | 1550 |
| Thermal stability (heated to 1300 ℃, water cooling), thermal cycle,＞ | 4 | 6 | 5 | 3 | 5 | 8 | 5 | 5 |
| Linear variation shrinkage，1650℃，3 hours，%＜ | 0,7 | 0,7 | 0,8 | 0,9 | 0,9 | - | 0,5 | 0,6 |
| Usage | For vaults of open-hearth furnaces melting | For lining of rotary kilns | For vaults and walls | |||||
Keywords:
chrome
7-15
65
for
thermal
16
1500
1540
0
7
0
9
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