Alumina-silica Refractory Bricks Used In Electric Arc Furnace Roof

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Alumina-silica Refractory Bricks Used In Electric Arc Furnace Roof4 
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Alumina-silica Refractory Bricks Used In Electric Arc Furnace Roof

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If you are interested in this kinds of products,welcome view our website. high temperature insulating bricks 
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the follows are some detail parameters of our products,in order to save your time,we just show you the datas

fire clay brick for various kilns

Characteristics:

Fireclay brick is made from clinker clay by mixing, forming, drying, sintering and matching characterized by good resistance to corrosion and abrasion, good thermal shock resistance, good spelling resistance, high mechanical strength, good volume stability under high temperature.

Specifications

1. for Glass Melting Furnace

2. High quality and best price

3. Chemical stability

4. ISO9001:2000

5. Timely deliver

Applications: Metallurgy, building materials, chemical industry, petroleum, machinery manufacturing, silicate, power and other industries.

Physical andChemical Indicators:

Items

Index

N-1

N-2a

N-2b

N-3a

N-3b

N-4

N-5

N-6

Refractoriness, °C ≥

1750

1730

1730

1710

1710

1690

1670

1580

Refractoriness Under Load,°C, [0.2MPa×0.6%]  ≥

1400

1350

--

1320

--

1300

--

--

Linear Change on Rehearting,%

1400°C×2h

+0.1  -0.4

+0.1  -0.5

+0.2  -0.5

--

--

--

--

--

1350°C×2h

--

--

--

+0.2  -0.5

+0.2  -0.5

+0.2  -0.5

+0.2  -0.5

--

Apparent Porosity,  %   ≤

22

26

24

24

26

24

26

28

Cold Crushing Strength,  MPa  ≥

30.0

20.0

25.0

20.0

15.0

20.0

15.0

15.0



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Q:What is the content of free silica in the refractory bricks of high alumina bricks?
Refractory powders are not rich in free silica in varying degrees
Q:What is the difference between fireclay bricks and high alumina refractory bricks?
High alumina brick is one of refractory materials. The main component of this kind of refractory brick is AL2O3.
Q:Introduction of high alumina brick
Three alumina silicate refractory product with a content of two Al2O3 (48%).
Q:What materials are used for roof insulation?
There are two kinds: one is a kind of cotton insulation board, such as rock wool board, aluminum silicate cotton board, but this is not environmental protection, harmful to life, foam board (this fire safety factor minimum), these relatively cheap.
Q:Which thermal shock stability of clay brick and high alumina brick is good?
Generally, the thermal shock resistance of high alumina brick products is worse than that of clay brick products
Q:How to make refractory bricks and boiler wall adhesion more firm?
If the condition, the user heat-resistant steel welding grip nails, expansion joints can not be too big.. Also to use high temperature aluminum brick, high temperature resistance, but also to extend its use cycle.
Q:How are the grades of high alumina bricks differentiated?
In China, the content of Al2O3 in high alumina brick is usually divided into three categories: I, etc. - Al2O3 content > 75%; II, etc. - Al2O3 content is 60 to 75%; III and so on - Al2O3 content is 48 ~ 60%.
Q:The difference between clay bricks and clay bricks
According to the hole rate: solid brick (no hole or hole rate less than 25% bricks), porous brick (hole rate is equal to or greater than 25%), the size of the hole is small and the number of bricks, usually used in load-bearing parts, higher strength level. Hollow brick (hole rate equal to or greater than 40%, large pore size and small amount of brick, commonly used in non load parts, low strength grade).Solid bricks and porous bricks are mostly used for load-bearing structural walls. Hollow bricks are mostly used in non load bearing structures.
Q:What is fireproof concrete?
A series of concrete with fire resistance and heat resistance is made of Portland cement series as cementing material and heat-resistant material as aggregate. Silicate fireproof heat-resistant concrete with Portland slag cement, Portland cement and water glass as cementing material, broken clay brick, clay, cement clinker, broken high alumina brick as aggregate.
Q:How high can aluminum bricks expand at 80O degrees of heat?
When an object is heated, the particle moves faster and thus occupies additional space. This phenomenon is called dilation.

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