high alumina insulating fire brick for boiler/furnace

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Loading Port:
China main port
Payment Terms:
TT OR LC
Min Order Qty:
10 m.t.
Supply Capability:
100000 m.t./month

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Product Description:

Quick Details

Place of Origin:

Henan, China (Mainland)

Shape:

Brick

Material:

Mullite

SiO2 Content (%):

0

Al2O3 Content (%):

52-72%

MgO Content (%):

0

CaO Content (%):

0

Refractoriness (Degree):

1770°< Refractoriness< 2000°

CrO Content (%):

0

SiC Content (%):

0

Brand Name:

Lite

Size:

230*114*65mm

Fe2O3 /%:

0.8-1.0

Bulk Density g/cm3:

1.0~1.2

Cold crushing strength/ Mpa:

2.5~5.0

Reheating Linear Change(%)°C X 12H:

≤1 (1350℃-1650°C)

Thermal Conductivity(W/m.k)(350°C):

0.32-0.44

Weight of brick:

1.0-2.0kg

Working temperature:

less than 1600°C

Sample:

free

Packaging & Delivery

Packaging Details:1.On wooden pallets with plastic cover 2.According to customer's demands
Delivery Detail:Within 30 days

Brick Shape and Mullite Material high temperature light weight high alumina insulating fire brick for boiler/furnace

Product Description

1.Description

High alumina insulating fire brick, using high pure mullite as raw material, is made by adding alumina powder according to different type and then sintering in high temperature. The Al2O3 content is 50-85%.

2.Feature

1.Low levels of iron and other impurities

2.High mechanical intensity

3.High refractoriness, can contact with the flame directly, suitable for various atmosphere

4.High porosity, low volume density, low thermal conductivity

5.Good heat insulating performance and energy-efficient

6.Low creep rare at high temperature,good thermal shock stability

7.Chemical corrosion resistance

8.Long service life

3.Technical Data

Item

High alumina insulating fire brick

1.0

1.0

1.0

1.0

1.2

1.2

Al2O3/%

≥52

≥55

≥60

≥65

≥65

≥72

Fe2O3/%

≤1.0

≤0.8

≤0.8

≤0.8

≤0.8

≤0.8

Bulk Density(g/cm3)

≤1.0

≤1.0

≤1.0

≤1.0

≤1.2

≤1.2

Cold   Crushing Strength Mpa

≥3.5

≥3.5

≥4.0

≥3.0

≥5.0

≥2.5

Reheating Linear Change (%)°C X 12H

1350℃

≤1

1400℃

≤1

1500℃

≤1

1550℃

≤1

1550℃

≤1

1650℃

≤1

Thermal Conductivity(W/m.k)(350°C)

 

0.33

 

0.33

 

0.33

 

0.32

 

0.35

 

0.44

4.Application

High alumina insulating fire brick can be in direct contact with the flame,this insulating brick can be used as linings or as thermal preservation layers in various industrial furnaces and kilns in metallurgical industry, ceramic industry, chemical industry, machinery industry, such as blast furnace, hot blast stoves ,electric arc furnace, cement kiln,melting furnace, ignition furnace, flue, refining equipment, heating equipment and piping, regeneration device, gas furnace, soaking furnace, annealing furnace, heat reaction chamber and other thermal industrial equipment.

 

high alumina insulating fire brick for boiler/furnace

high alumina insulating fire brick for boiler/furnace

high alumina insulating fire brick for boiler/furnace

high alumina insulating fire brick for boiler/furnace

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Q:Is there a big difference between two high alumina brick and one high alumina brick?
The difference between the two kinds of high alumina bricks is great. I perennial in Zhengzhou was responsible for the production and sale of colt refractories
Q:How can the refractory brick blast furnace be pulverized and pulverized enough not to be taken away by the wind?
The gas will directly lead the dome combustion, in order to ensure good mixing, complete combustion of gas and air in a short time, the combustion capacity of short flame or flameless combustion burner, commonly used for semi jet short flame burner.
Q:How to make refractory bricks and boiler wall adhesion more firm?
Suggest that you use fire brick to increase the length of brick or pull the amount of turn, and use high temperature mortar masonry
Q:What are the alloy wear resistance materials?
According to the composition of Beijing Naimo metal materials company will wear resistant metal materials is divided into the following five categories: one: high manganese steel series: high manganese steel (ZGMn13),
Q:How are the high alumina bricks fired?
Light and high alumina bricks are usually fired in a weak oxidizing atmosphere. In light and high alumina bricks firing, they are often rich in impurities such as R2O, RO, Fe2O3 and so on. They react with Al2O3 and SiO2 at high temperature to produce liquid phase. In the Al2O3 - SiO2 - R2O system, the growth rate of liquid phase increases with the increase of temperature at high temperature. So, because the increase of sintering temperature brings a lot of liquid phase, the decrease of liquid viscosity will lead to the deformation of brick and the decline of brick high temperature function. Therefore, the lower sintering temperature and longer holding time should be adopted in the sintering process dominated by liquid phase sintering. The production practice shows that the same firing temperature can be used for the high grade aluminum bricks. When fired in an inverted flame kiln, it is usually 1430 degrees centigrade and insulated by 40H. The high alumina bricks such as Ill are 1390~1420 degrees centigrade. When the tunnel kiln is fired, they are 1550 and 1450~1500 degrees centigrade respectively. High alumina brick is usually made of weak oxidizing atmosphere.
Q:What are the high aluminum bricks made of?
The amount of refractory mud accounts for about 6% of the brick weight
Q:What should be used as binder for making high alumina bricks?
In addition, high alumina micro powder can be used as binding agent, or high alumina micro powder and clay powder are prepared according to a certain proportion, and synthetic mullite is used as bonding agent. With these binders, high alumina bricks without two expansion can be prepared.
Q:What is the standard classification of high alumina bricks or high alumina bricks?
High alumina brick is one of refractory materials. The main component of this kind of refractory brick is AL2O3. High alumina brick refractory clay brick and brick than refractoriness to high. It belongs to high refractory. High alumina brick Al2O3 more, close to the neutral refractory material, can resist acid slag and alkaline slag erosion, because it contains SiO2, so the ability of alkaline slag resistance than acid resistant slag ability is weaker.According to the number of AL2O3 content is divided into, 55,65, 75,80 and so on several grades.
Q:How many cubic bricks does a high alumina brick have?
It is related to the content of aluminum in high alumina bricks.
Q:Use of high alumina refractory bricks?
High alumina refractory brick in Al2O3 more, close to neutral refractory material, can resist acid slag and alkaline slag erosion, because it contains SiO2, so alkaline slag ability than acid resistance slag ability less.It is widely used in building blast furnace, hot blast furnace, furnace top, blast furnace, reverberatory furnace and rotary kiln lining. In addition, high alumina bricks are widely used as furnace regenerative checker, pouring system for plug nozzle, etc..

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