Magnesia Products
Refractory magnesia products made of sintered magnesia powder are used for laying high temperature furnaces (GB 4689-94) and electric melting magnesia and magnesia products rich in magnesite are used for lining of electric arc steel furnaces (GB 28468-90).
Category：
Description
| Index item | Specification standard | |||||
| P-91 | P-90 | P-89 | PPD-93 | PD-92 | PD-89 | |
| GB code | 4689-94 | 28468-90 | ||||
| Mass fraction,% | ||||||
| MgO, ＞ | 91 | 90 | 89 | 93 | 92 | 89 |
| CaO, ＜ | 3 | 4 | 4,5 | 2.5 | 3,0 | 4,0 |
| SiO2, ＜ | 3 | 3 | - | 1,7 | 2,5 | 2,5 |
| Apparent porosity, %, ＜ | 22 | 23 | 26 | 18 | 18 | 24 |
| Compressive strength，N/мм2, ＞ | 60 | 50 | 40 | 45 | 60 | 45 |
| Initial temperature，℃，＞ | 1550 | 1550 | 1500 | 1600 | 1570 | 1520 |
| Usage | Hearth, slopes and walls for open-hearth furnaces and steelmaking furnaces | For slag zone and furnace walls | For slopes where metal and slag contacts | For hearths and slopes | ||
Keywords:
magnesia
and
for
slopes
89
45
slag
18
1550
furnaces
Online Inquiry
12/F World Trade Center Zhongshan District Dalian China 116001
+86-411-83623330
+86-18642817880
