Home Insulating Firebrick (IFB) Hollow Sphere Alumina Brick

Hollow Sphere Alumina Brick

Hollow Sphere Alumina Brick

Hollow Sphere Alumina Brick / Light Weight Brick , also named Bubble Alumina Brick, are for applications up to 1800°C/3270°F. These bricks have excellent insulating properties and high hot strengths. Bubble alumina bricks are made with tiny hollow insulating spheres made from high-purity alumina (also called bubble alumina).
Alumina raw materials are melted in an electric arc furnace at 2200°C. When pouring the melt out, blow the melt with high-pressure air to make the melt dispersed into small droplets. During the cooling process, the droplets form alumina hollow balls due to surface tension effects. The hollow balls are screened to remove fine powder and big fragments and particles. Iron is removed with the magnetic iron. Broken balls are removed with a ball selecting machine. Then the alumina hollow spheres are packed as the finished products.

Alumina does not exhibit high thermal conductivity, and when in the form of hollow spheres, its thermal conductivity is additionally reduced. Both properties make Hollow Sphere Alumina Brick an excellent insulating material that can withstand exceptionally high temperatures. Typical applications for Bubble alumina bricks include gas or electrically heated kilns and furnaces, and glass making industries.

The Hollow Sphere Alumina Brick that contains high-alumina bubbles are often used as the working lining in ceramic kilns, backup linings in gasifiers for coal and petroleum coke, gas/oil (with heavy residue feed stock), and industrial waste. These IFBs are also used in hazardous waste and fluorine processing incinerators, hydrogen generators, auto thermal reactors for methanol production, and ammonia reformers.

High-purity Hollow Sphere Alumina Brick are designed to withstand high temperatures and demanding environments. These bubbles themselves are an important component in refractories used for many different applications, including insulation of kiln brick and ceramic tile linings in gas turbines, backup linings in reactors, and working linings in manufacturing high-purity quartz for the electronics industry.

Hollow Sphere Alumina Brick

Hollow Sphere Alumina Brick / Light Weight Brick Typical Applications:

Bright Annealing Furnace (for stainless steel, non-ferrous alloy metal), Metal Ceramic Sintering Furnace, Brazing Furnace, Semiconductor Firing Furnace and Hydrogen Atmosphere Furnace.

Hollow-Sphere-Alumina-Brick Hollow Sphere Alumina Brick 04 www.osymen.com

Hollow Sphere Alumina Brick 05 www.osymen.com Hollow Sphere Alumina Brick 06 www.osymen.com

Hollow Sphere Alumina Brick 07 www.osymen.com Hollow Sphere Alumina Brick 08 www.osymen.com

OSYMEN

Unit

HSA99 -1.4

HAS99 -1.6

HSA99 -1.8

HSA95 -1.4

HSA95 -1.6

HSA95 -1.8

HSA90 -1.4

HSA90 -1.6

HSA90 -1.8

Bulk density

g/cm³

1.4

1.6

1.8

1.4

1.6

1.8

1.4

1.6

1.8

lb/ft³

87

100

112

87

100

112

87

100

112

Cold Crushing Strength

Mpa

6

10

12

8

12

16

10

14

18

lb/in²

870

1450

1739

1160

1739

2319

1450

2029

2609

Refractoriness under load T0.5

°C

1700

1700

1700

1700

1700

1700

1650

1650

1680

°F

3092

3092

3092

3092

3092

3092

3002

3002

3056

Thermal conductivity

1000°C

W/(m.K)

0.9

1.1

1.2

0.9

1.1

1.2

0.9

1.1

1.2

1832°F

BTU/(ft²×h×°F/in)

6.24

7.63

8.33

6.24

7.63

8.33

6.24

7.63

8.33

Permanent Linear Change

1600°C x3h

%

-0.3/0.3

-0.3/0.3

-0.3/0.3

-0.3/0.3

-0.3/0.3

-0.3/0.3

-0.3/0.3

-0.3/0.3

-0.3/0.3

2912°F x3h

%

-0.3/0.3

-0.3/0.3

-0.3/0.3

-0.3/0.3

-0.3/0.3

-0.3/0.3

-0.3/0.3

-0.3/0.3

-0.3/0.3

Chemical Analysis: Approximate (Calcined Basis)

 Al2O3

%

99

99

99

95

95

95

90

90

90

Fe2O3

%

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

0.2

SiO2

%

0.3

0.3

0.3

Last updated: 2024-01-03
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