Chrome magnesia products
Refractory chrome magnesia products with refractoriness of no less than 2000 ℃. are used in masonry for metallurgy and various high temperature equipment (GB 5381-93), chrome magnesia bricks are used for lining of rotary kilns in cement and other industries (GB 21436-2004) and heat-resistant chrome magnesia bricks are used for lining of electric arc steel furnaces (GB 28468-90).
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Description
| Index item | Specification standard | ||||||
| KHP1 | KHP2 | KHP3 | KHP4 | KHP5 | KHPC | KHPTD-55 | |
| GB code | 5381-93 | 21436-2004 | 28468-90 | ||||
| Mass fraction,% | |||||||
| MgO, ＞ | 46 | 46 | 42 | 42 | 42 | 42 | 55 |
| Cr2O3, ＞ | 22 | 22 | 20 | 15 | 15 | - | - |
| Cr2O3 | - | - | - | - | - | 20-30 | 16-22 |
| SiO2, ＜ | 6 | 7 | 8 | 8 | 8 | - | |
| Apparent porosity，%，＜ | 20 | 22 | 23 | 24 | 25 | 25 | 20 |
| Volume density，g/см3, ＞ | 2,95 | 2,95 | 2,95 | - | - | - | - |
| Compressive strength，N/мм2, ＞ | 30 | 27,5 | 25 | 25 | 20 | 20 | 25 |
| Initial temperature，℃，＞ | 1550 | 1520 | 1500 | 1500 | 1450 | 1450 | 1540 |
| Thermal stability (heated to 1300 ℃, water cooling), thermal cycle, ＞ | 2 | 2 | 2 | - | - | 2 | 7 |
| Usage | Used for Vaults of open-hearth furnaces, electric arc furnaces and thermal equipment | Used for vaults of steelmaking electric furnaces and other thermal equipment | For laying thermal equipment | For lining of rotary kilns | For vaults and walls | ||
Keywords:
chrome
thermal
20
25
for
42
equipment
furnaces
22
2
95
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