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Basic refractory product |
Basic refractory product including magnesia brick, magnesite-chrome brick, and magnesite-alumina spinel brick is mainly used in various refining furnaces, such as AOD£¬VOD£¬LF £¬RH,large cement kiln and molten steel ladle. |
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Performance index |
Item |
Index |
MZ-97A |
MZ-97B |
MZ-95A |
MZ-95B |
MZ-93 |
MZ-91 |
MZ-89 |
MZ-87 |
¦Ø(MgO)/% ¡Ý |
97 |
96.5 |
95 |
94.5 |
93 |
91 |
89 |
87 |
¦Ø(SiO2)/% ¡Ü |
1.0 |
2.0 |
2.0 |
2.0 |
3.5 |
- |
- |
- |
¦Ø(CaO) /% ¡Ü |
- |
- |
2.0 |
2.0 |
2.0 |
3.0 |
3.0 |
3.0 |
Apparent porosity % ¡Ü |
16 |
18 |
16 |
18 |
18 |
18 |
20 |
20 |
Cold crushing strength MPa ¡Ý |
60 |
60 |
60 |
60 |
50 |
50 |
0.20MPa Refractoriness under load¡æ ¡Ý |
1700 |
1650 |
1620 |
1560 |
1550 |
1540 |
Reheating linear change (1650 ¡æ/2h)% |
0¡ª-0.2 |
0¡ª-0.3 |
0¡ª-0.4 |
0¡ª-0.5 |
0¡ª-0.6 |
¡ª |
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Item |
Index |
ML-80A |
ML-80B |
MgO /%
No less than |
80 |
80 |
Al2O3 |
5-10 |
5-10 |
0.20MPa Refractoriness under load¡æ
No less than |
1600 |
1580 |
Apparent porosity %
No more than |
18 |
20 |
Cold crushing strength MPa
No less than |
39.2 |
29.4 |
Thermal shock stability£¬cycle
No less than |
3 |
3 |
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High-calcium magnesia brick |
Performance index |
Item |
Index |
MG-10 |
MG-15 |
MG-20 |
MG-25 |
MG-30 |
¦Ø(MgO) /% ¡Ý
¢úmin |
80
79 |
75
74 |
70
69 |
65
64 |
60
59 |
¦Ø(CaO)/% ¡Ý
¢úmin |
10
9 |
15
14 |
20
19 |
25
24 |
30
29 |
¦Ø(SiO2,AI2O3,Fe2O3 content)/%¡Ü
¢úmin |
3.0
3.3 |
Apparent porosity% ¡Ü
¢úmin |
8
9 |
Cold crushing strength / MPa ¡Ý
¢úmin |
50
40 |
0.20MPa Refractoriness under load ¡æ ¡Ý¢úmin |
1700
1680 |
Bulk density/£¨g/cm2¡Ý¢úmin |
3.00
2.96 |
2.95
2.91 |
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Performance index |
Item |
Index |
MGe-20A |
MGe-20B |
MGe-20C |
MGe-16A |
MGe-16B |
MGe-16C |
MgO % No less than |
50 |
45 |
40 |
55 |
50 |
45 |
Cr2O3 %No less than |
20 |
20 |
20 |
16 |
16 |
16 |
Apparent porosity % No more than |
18 |
19 |
22 |
18 |
19 |
22 |
Cold crushing strength MPa No less than |
35 |
30 |
25 |
35 |
30 |
25 |
0.20MPa Refractoriness under load ¡æ No less than |
1700 |
1650 |
1550 |
1700 |
1650 |
1550 |
Thermal shock resistance£¨950¡æ air£©£¬cycle No less than |
provide data |
Item |
Index |
MGe-12A |
MGe-12B |
MGe-12C |
MGe-8A |
MGe-8B |
MGe-8C |
MgO % No less than |
65 |
60 |
55 |
70 |
65 |
60 |
Cr2O3 % No less than |
12 |
12 |
12 |
8 |
8 |
8 |
Apparent porosity% No more than |
18 |
19 |
211 |
8 |
19 |
21 |
Cold crushing strength MPa No less than |
40 |
35 |
30 |
40 |
35 |
30 |
0.20MPa Refractoriness under load¡æ No less than |
1700 |
1650 |
1550 |
1700 |
1650 |
1530 |
Thermal shock resistance£¨950¡æ air£©£¬cycle
No less than |
provide data |
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Directly bonded magnesite-chrome brick |
Performance index |
Item |
Index |
DMC-12 |
DMC-9-B |
DMC-9-C |
DMC-6 |
DMC-4 |
MgO %
No less than |
60 |
70 |
70 |
75 |
80 |
Cr2O3 %
No less than |
12 |
9 |
9 |
6 |
4 |
SiO2 %
No more than |
3.2 |
3.0 |
2.8 |
2.8 |
2.5 |
Apparent porosity %
No more than |
19 |
19 |
19 |
18 |
18 |
Bulk density kg/m3
No less than |
3000 |
2980 |
2980 |
2950 |
2930 |
Cold crushing strength MPa No less than |
35 |
40 |
40 |
40 |
40 |
0.20MPa Refractoriness under load¡æ
No less than |
1580 |
1580 |
1600 |
1600 |
1600 |
Thermal shock stability£¨1100¡æ¡ªwater cooling£©cycle
No less than |
4 |
4 |
4 |
4 |
4 |
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