Item/Grade
|
Fire clay brick
|
|
|
|
High alumina brick
|
|
|
|
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|
SK-30
|
SK-32
|
SK-34
|
SK-35
|
SK-36
|
SK-37
|
SK-38
|
SK-40
|
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AL2O3% (≥)
|
30
|
35
|
38
|
45
|
55
|
65
|
70
|
82
|
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Fe2O3% (≤)
|
2.5
|
2.5
|
2
|
2
|
2
|
2
|
2
|
2
|
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Refractoriness(SK)
|
30
|
32
|
34
|
35
|
36
|
37
|
38
|
40
|
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Refractoriness under load, 0.2MPa, °C (≥)
|
1250
|
1300
|
1360
|
1420
|
1450
|
1480
|
1530
|
1600
|
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Apparent porosity (%)
|
22-26
|
20-24
|
20-22
|
18-20
|
20-23
|
20-23
|
20-22
|
18-20
|
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Bulk density (g/cm³)
|
1.9-2.0
|
1.95-2.1
|
2.1-2.2
|
2.15-2.22
|
2.25-2.4
|
2.3-2.5
|
2.4-2.6
|
2.5-2.7
|
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Cold crushing strength ,MPa (≥)
|
20
|
25
|
30
|
40
|
45
|
50
|
60
|
70
|