Index

MZ-97A

MZ-97B

MZ-95A

MZ-95B

MZ-93

MZ-91

MZ-89

MZ-87

ω(MgO)/% ≥

97

96.5

95

94.5

93

91

89

87

ω(SiO2)/% ≤

1.0

2.0

2.0

2.0

3.5

-

-

-

ω(CaO) /% ≤

-

-

2.0

2.0

2.0

3.0

3.0

3.0

Apparent porosity % ≤

16

18

16

18

18

18

20

20

Cold crushing strength MPa ≥

60

60

60

60

50

50

0.20MPa Refractoriness under load℃ ≥

1700

1650

1620

1560

1550

1540

Reheating linear change (1650 ℃/2h)%

0—-0.2

0—-0.3

0—-0.4

0—-0.5

0—-0.6

—

Index

ML-80A

ML-80B

MgO /% No less than

80

80

Al2O3

5-10

5-10

0.20MPa Refractoriness under load℃ 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

Index

MG-10

MG-15

MG-20

MG-25

MG-30

ω(MgO) /% ≥ Ⅹmin

80
79

75
74

70
69

65
64

60
59

ω(CaO)/% ≥ Ⅹmin

10
9

15
14

20
19

25
24

30
29

ω(SiO2,AI2O3,Fe2O3 content)/%≤
Ⅹmin

3.0
3.3

Apparent porosity% ≤
Ⅹmin

8
9

Cold crushing strength / MPa ≥
Ⅹmin

50
40

0.20MPa Refractoriness under load ℃ ≥Ⅹmin

1700
1680

Bulk density/（g/cm2≥Ⅹmin

3.00
2.96

2.95
2.91

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 ℃ No less than

1700

1650

1550

1700

1650

1550

Thermal shock resistance（950℃ 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℃ No less than

1700

1650

1550

1700

1650

1530

Thermal shock resistance（950℃ air），cycle No less than

provide data

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℃ No less than

1580

1580

1600

1600

1600

Thermal shock stability（1100℃—water cooling）cycle No less than

4

4

4

4

4