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service details

防火镁材



1.镁铬砖

我们有20年镁铬砖生产及施工经验。

No.

Items

Typical value

Test method

1

Chemical composition (%)

MgO

55-80%

GB/T 5069

2

Cr2O2

4-20%

3

SiO2

≤2.5

4

Al2O3

≤2.0

5

Fe2o2

≤8.0

6

CaO

≤2.0

7

Physical Properties

Cold Crushing Strength (Mpa)

35-40

GB/T 5072

8

Apparent Porosity (%)

17-18

GB/T 2997

9

Bulk Density (g/cm3)

3.0-4.0

10

Refractoriness Under Load ()

1600-1750

YB/T 370






2.镁粉

No.

Chemical composition (%)

Typical value

Test method

1

Magnesia granule (1-3 Mesh)

MgO

≥89

GB/T 5069

2

Magnesia Powder (200 Mesh)

≥80


3.镁砖


No.

Items

Typical value

Test method

1

Chemical composition (%)

MgO

91-98

GB/T 5069

2

CaO

≤3.0

3

SiO2

≤2.5

4

Physical Properties

Cold Crushing Strength (Mpa)

55-60

GB/T 5072

5

Apparent Porosity (%)

16-18

GB/T 2997

6

Refractoriness Under Load ()

1520-1700

YB/T 370