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Magnesia Chrome Bricks

Magnesia chrome brick is made of magnesium oxide (MgO) chromium oxide (Cr2O3) as the main ingredient,periclase spinel as main mineral components of refractory products.

1.Common Magnesia Chrome Brick

Item

MGe6

MGe8

MGe12

MGe16

MGe20

MgO %

80

72

70

65

56

Cr2O3 %

7

10

13

17

22

CaO %

1.2

1.2

1.2

1.2

1.2

SiO2 %

3.8

4

4

4.2

3

Al2O3 %

4.5

6.5

6

6

10.5

Fe2O3 %

4

4.8

5.5

6.5

7.3

Apparent Porosity %

17

18

18

18

19

Bulk Density g/cm3

3

3

3.02

3.05

3.07

Cold Crushing Strength Mpa

55

55

55

50

50

Refractoriness Under Load °C

1600

1600

1600

1600

1620

2.Direct-Bonded Magnesia Chrome Brick

Item

DMGe4

DMGe8

DMGe10

DMGe12

DMGe16

MgO %

85

77

75.2

74

69

Cr2O3 %

5.5

9.1

11.5

14

18

CaO %

1.1

1.4

1.2

1.2

1.2

SiO2 %

1.3

1.2

1.3

1.2

1.5

Al2O3 %

3.5

4

6.4

3.5

4.5

Fe2O3 %

3

6.4

4.2

5

5.7

Apparent Porosity %

18

18

18

18

18

Bulk Density g/cm3

3.02

3.04

3.05

3.06

3.08

Cold Crushing Strength Mpa

50

50

55

55

55

Refractoriness Under Load °C

1700

1700

1700

1700

1700

Thermal expansion %

1000°C

1

1

1

1

0.9

1600°C

1.8

1.8

1.8

1.8

1.6

3.Semi-rebonded and Fuse-rebonded Magnesia-Chrome Brick

Item

QBMGe12

QBMGe18

QBMGe20

QMGe20

QMGe22

QMGe28

MgO %

75

68

65

66

63

53

Cr2O3 %

15

19

20.5

20.5

22.5

28

CaO %

1.3

1.3

1.3

1.2

1.2

1.2

SiO2 %

1.5

1.5

1.7

1.4

1.4

1.4

Al2O3 %

3

4

4.2

4

4.5

4

Fe2O3 %

4

5.5

7

6.5

7.5

10

Apparent Porosity %

16

15

15

14

14

14

Bulk Density g/cm3

3.18

3.23

3.26

3.28

3.23

3.35

Cold Crushing Strength Mpa

50

60

60

65

65

65

Refractoriness Under Load °C

1700

1750

1750

1750

1750

1750

Thermal expansion %

1000°C

0.7

0.7

0.7

0.7

0.7

0.7

1600°C

1.4

1.4

1.4

1.4

1.4

1.4

Magnesia chrome brick is widely used in cement rotary kiln,glass kiln regenerative chamber,glass kiln regenerative chamber,refining ladle permanent layer,non-ferrous metallurgical furnace,lime kiln,mix iron furnace etc high temperature kiln furnace.

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