Specifications

Bubble Alumina Brick and Insulating Firebrick are high temperature refractory brick, max temp 1800 deg C, used in furnace kiln.

Bubble Alumina Brick and Insulating Firebrick are high temperature refractory brick.

 

Bubble Alumina Brick. We stock in both 2.5 & 3” sizes. We also carry double bump interlocking anchor styles. For use up to 1800C, these brick have excellent insulating properties as well as high hot strengths.

 

Insulating firebrick, we carry produces thirteen types of Insulating Fire Brick for use in applications from 2,000°F (1,093°C) to 3,200°F (1,760°C). Each type is formulated to meet specific thermal and physical requirements and after firing is machined to precise tolerances.

 

Made from high purity refractory clays and other ceramic raw materials, these insulating fire brick contain a carefully graded organic filler which is burned out during manufacture to give a uniform controlled pore structure.

 

Advantages of bubble alumina brick.

High Insulating Value

The light weight and high insulating value of refractory brick make possible thinner furnace walls, improved efficiency and lower operating costs.

 

Strong

The high compressive strength of bubble alumina brick allows for self-supporting structures at elevated temperatures. Insulating fire brick are compatible with dense fire brick and add strength to the whole construction.

 

Low Heat Storage

Lower heat storage versus dense brick means reduced fuel costs in cyclically operated heating equipment.

 

High Purity

Bubble alumina brick are low in impurities such as iron which can adversely affect refractory performance in many applications. They are used in many furnaces operating with a controlled atmosphere.

Accurate Dimensions

 

Because STA Insulating Fire Brick are machined to precise dimensions, courses can be laid quickly and easily. The result is a stronger, tighter refractory lining resulting in less heat loss through the joints.

 

Typical Applications of refractory brick.

Recommended for use as primary hot face refractory linings or as back-up insulation behind other refractories in furnaces, flues, kilns and similar high temperature industrial equipment.

 

Size is no obstacle. Most Bubble alumina brick are available in STA series, which require no mortar joints to produce sizes up to 24″x9″x3″. No longer are there design limitations caused by traditional standard brick shapes and sizes. The nominal cost of STA sizes is more than offset by the elimination of many mortar joints and significant labor savings.

 

Physical and chemical index

Item		AKZ-85	AKZ-90	AKZ-99
Chemical composition	Al2O3	≥85	≥90	≥99
	SiO2	≤13	≤8	≤0.2
	Fe2O3	≤0.5	≤0.5	≤0.5
Apparent Porosity%		58-62	58-62	58-62
Bulk Density g/cm3		1.4-1.7	1.4-1.7	1.4-1.7
Cold Crushing Strength Mpa		≥12	≥10	≥9
0.1Mpa Refractoriness Under Load T0.6 °C		≥1650	≥1700	≥1700
Permanent Linear Change On Reheating (%)1500°CX2h		±0.3	±0.3	±0.3
20-1300°C Thermal Expansion  % (x 10-6)		0-7.8	0-8.0	0-8.6
Thermal Conductivity(Average 800°C) W/(M.K)		≤0.8	≤1.3	≤1.5
Max Service Temperature °C		1680	1700	1800

 

1.  Bubble alumina brick often used as insulating linings and working linings of high temperature kilns.Features:

2.  The lining weight will be reduced and the effect on energy saving is significant.