Corundum Brick

Short Description:

The alumina content of corundum brick is more than 90% and the main crystal phase is corundum. It has high compressive strength at room temperature (up to 340MPa), high load softening start temperature (more than 1700℃), good chemical stability, and strong resistance to acidic or alkaline slag, metal and molten glass, etc. Resistance.
Thermal shock stability is related to its structure, and the corrosion resistance of dense products is good. There are two types of sintered corundum bricks and fused corundum bricks. Sintered alumina and fused corundum can be used as raw materials, or bauxite clinker with high Al2O3/SiO2 ratio can be combined with sintered alumina and made by sintering method. Phosphoric acid or other bonding agents can also be used to make non-fired corundum bricks.


Product Detail

PRODUCTIVE PROCESS

Packing And Shipping

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Description


The alumina content of corundum brick is more than 90% and the main crystal phase is corundum. It has high compressive strength at room temperature (up to 340MPa), high load softening start temperature (more than 1700℃), good chemical stability, and strong resistance to acidic or alkaline slag, metal and molten glass, etc. Resistance.
Thermal shock stability is related to its structure, and the corrosion resistance of dense products is good. There are two types of sintered corundum bricks and fused corundum bricks. Sintered alumina and fused corundum can be used as raw materials, or bauxite clinker with high Al2O3/SiO2 ratio can be combined with sintered alumina and made by sintering method. Phosphoric acid or other bonding agents can also be used to make non-fired corundum bricks.

Features

Ultra-high cold press strength characteristics / Higher bulk density

Good high temperature fire resistance / Lower impurity content / Excellent slag and abrasion resistance

Application

Corundum bricks mainly used in iron-making blast furnaces and blast furnace hot-blast furnaces, refining furnaces outside steel-making furnaces, sliding water heaters, glass melting furnaces and petrochemical industrial furnaces.

It is widely used in the lining of various high-temperature kilns and kiln furniture in the petrochemical and fertilizer industries, such as cracking, reforming furnaces, and metallurgical industries.

Physical And Chemical Indicators

Brand / Properties

JC-98

JC-95

JC-90

JC-85

ChemicalComposition (%)

Al2O3%

98.5

95

90

85

SiO2%

0.3

3.0

9.0

18

Fe2O3%

0.2

0.2

0.5

0.5

Apparent Porosity (%)

18

18

18

20

Bulk density,g/cm3

3.0

2.95

2.9

2.75

Cold Crushing strength MPa

90

80

80

70

Refractoriness under Load(0.2MPa ℃)

1700

1650

1650

1700

Permanent Linear Change(%)1600°C×3h

0.1

0.2

0.2

0.3


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  • 1.Raw material quality control including physical and chemical testing.           
    2.Crushing and grinding of bulk raw materials.
    3. According to customer data sheet required to mixing Raw Material.
    Pressing or shaping the green brick depend on different raw material and brick shape.
    4.Dry the bricks at dryer kiln.
    5.Put the bricks into the tunnel kiln to burning by higher temp from 1300-1800 deg.
    6.The quality control department will inspect the finished refractory bricks random.

    Packaging  according to safety sea-exporting packing Standard
    Dispatch : loading the finished packing material at factory by container Door toDoor   
    By sea fumigated wooden pallet + plastic belt  + plastic film wrap.

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