Magnesite chrome brick is a refractory product with MgO and Cr2O3 as the main components, and cubic magnesite and spinel as the main mineral components. The main raw materials for the manufacture of magnesia chrome bricks are sintered magnesia and chromite, the purity of magnesia raw materials should be as high as possible, the chemical composition of chromite requirements are: Cr2O3:30 ~ 45%, CaO: Less than or equal to 1.0 ~ 1.5%
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20A |
20B |
18A |
18B |
16A |
16B |
14A |
14B |
12A |
12B |
8A |
8B |
|
|
45 |
40 |
50 |
45 |
52 |
47 |
60 |
55 |
65 |
60 |
65 |
60 |
|
Cr2O3% Greater than or equal to |
30 |
30 |
26 |
26 |
24 |
24 |
20 |
20 |
16 |
16 |
16 |
16 |
|
Fe2O3% |
8-15 |
8-15 |
7-15 |
7-13 |
6-13 |
6-13 |
5-13 |
5-13 |
5-12 |
5-12 |
5-12 |
5-12 |
|
SiO2% Less than or equal to |
1.5 |
2.5 |
1.5 |
2.5 |
1.5 |
2.5 |
1.5 |
2.5 |
1.5 |
2.5 |
1.5 |
2.5 |
|
|
15 |
16 |
15 |
16 |
15 |
16 |
15 |
16 |
15 |
16 |
15 |
16 |
|
Bulk density g/cm3 Greater than or equal to |
3.38 |
3.38 |
3.33 |
3.33 |
3.30 |
3.30 |
3.25 |
3.25 |
3.20 |
3.20 |
3.20 |
3.20 |
|
|
50 |
50 |
50 |
50 |
50 |
50 |
50 |
50 |
50 |
50 |
50 |
50 |
|
0.2MPa refractoriness under load Greater than or equal to |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
|
|
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/ |
20A |
20B |
18A |
18B |
16A |
16B |
14A |
14B |
12A |
12B |
8A |
8B |
|
|
45 |
40 |
50 |
45 |
52 |
47 |
60 |
55 |
65 |
60 |
65 |
60 |
|
Cr2O3% Greater than or equal to |
30 |
30 |
26 |
26 |
24 |
24 |
20 |
20 |
16 |
16 |
16 |
16 |
|
Fe2O3% |
8-15 |
8-15 |
7-15 |
7-13 |
6-13 |
6-13 |
5-13 |
5-13 |
5-12 |
5-12 |
5-12 |
5-12 |
|
SiO2% Less than or equal to |
1.5 |
2.5 |
1.5 |
2.5 |
1.5 |
2.5 |
1.5 |
2.5 |
1.5 |
2.5 |
1.5 |
2.5 |
|
|
15 |
16 |
15 |
16 |
15 |
16 |
15 |
16 |
15 |
16 |
15 |
16 |
|
Bulk density g/cm3 Greater than or equal to |
3.38 |
3.38 |
3.33 |
3.33 |
3.30 |
3.30 |
3.25 |
3.25 |
3.20 |
3.20 |
3.20 |
3.20 |
|
|
50 |
50 |
50 |
50 |
50 |
50 |
50 |
50 |
50 |
50 |
50 |
50 |
|
0.2MPa refractoriness under load Greater than or equal to |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
