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  • Product Name: Sintered magnesium aluminate spinel
  • ID: c02

Sintered magnesium aluminate spinel

Product introduction:
  Sintered magnesium aluminate spinel is made by using imported industrial alumina and high puritu caustic magnesia as starting materials, through multi-stage homogenization process, and sintered at ultra high temperature in shaft kiln. The product has characters of high bulk density, high level of spinel phase, well developed crystal, uniform microstructure and consistent properties.

  As ideal raw material for refractory products as bricks and castables for ladle lining, cement rotary kiln and glass furnace, they contribute to good resistances to slag attack, spalling, and thermal shock. There are varieties of JMA-50, JMA-66, JMA-78 and JMA-90 available according to their alumina content.

 

Technical Indicators:

Data sheet of JMA-50sintered spinel

Items

Specifications

Typical values

Chemical composition
%

Al2O3

48-52

50.53

MgO

46-50

48.12

CaO

≤0.60

0.46

SiO2

≤0.45

0.32

Na2O

≤0.25

0.22

Fe2O3

≤0.30

0.22

Magnetic Fe

≤0.02

0.01

Bulk Density

≥3.30

3.32

Apparent porosity

≤3.00

2.18

Water absorption

≤1.00

0.70

 

Data sheet of JMA-66 sintered spinel

Items

Specifications

Typical values

Chemical
composition
%

Al2O3

64-67

65.26

MgO

32-35

33.45

CaO

≤0.50

0.36

SiO2

≤0.30

0.25

Na2O

≤0.20

0.17

Fe2O3

≤0.28

0.21

Bulk Density

≥3.20

3.26

Apparent porosity

≤3.00

2.09

Water absorption

≤0.80

0.68

 

Data sheet of JMA-78 sintered spinel

Items

Specifications

Typical values

Chemical composition
%

Al2O3

76-79

77.16

MgO

20-23

21.57

CaO

≤0.40

0.35

SiO2

≤0.35

0.29

Na2O

≤0.30

0.25

Fe2O3

≤0.25

0.18

Bulk Density

≥3.25

3.26

Apparent porosity

≤3.00

2.83

Water absorption

≤1.00

0.95

 

Data sheet of JMA-90 spinel

Items

Specifications

Typical values

Chemical composition
%

Al2O3

89-92

89.76

MgO

8-11

9.32

CaO

≤0.25

0.18

SiO2

≤0.25

0.21

Na2O

≤0.35

0.29

Fe2O3

≤0.15

0.09

Magnetic Fe

≤0.02

0.01

Bulk Density

≥3.30

3.35

Apparent porosity

≤3.00

2.35

Water absorption

≤1.00

0.92

 

Size availability:
  Different sizes from 15mm to under 2μm can be provided.
Product package:
  25kg/bag, 1000kg/bag or other specific packages as per users’ requirements are available.