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PRODUCT
common ramming mass

item 

index

high alumia 

magnesia, alumina, chrome 

alumina, zircon

alumdum ,¡¡chrome, zircon

magnesia, chrome

magnesia 

chemical component

£¥

Al 2 O 3

83

¡Ü 15

68

74

6

2.3

ZrO 2

(Fe 2 O 3 )

1.1

(MgO)

55 ¡« 66

11

6.6

(MgO)

59

(MgO)

93

Cr 2 O 3

£­

15~20

£­

15

16

£­

compressive strength

MPa

110 ¡æ

38.5

(150 ¡æ )

74.1

26.5

5.0

43.5

62

1000 ¡æ

47.6

32

42.6

(1200 ¡æ )

62.2

(1200 ¡æ )

25.8

54

1600¡æ

67.2

53

(1400 ¡æ )

38.4

(1500 ¡æ )

123.2

38.50

£­

refractoriness under load ¡æ

4 £¥

£­

£­

1340

>1700

1500

£­

linear change rate  after burning £¥

1600 ¡æ

£« 0.60

£­ 0.14

(1400 ¡æ )

£« 0.93

£­

£­ 0.60

(1000 ¡æ )

£­ 0.15

volume density g/cm 3

2.70

3.05

2.70

3.30

2.70

2.95

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