High Alumina Insulating Fire Brick for Boiler/Furnace
- Ref Price:
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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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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.
- Q:What kinds of minerals are there in the five major categories of ore crystal chemistry?
- Sulphide. A total of more than 200~300 kinds, followed by the type of silicate minerals, the weight of 0.25% of the crust. Chang Fu is an important nonferrous metal deposit, which is an important source of copper, lead, zinc, antimony and so on. It is of great economic value. The main features are: metal luster, color, streak is deep, low hardness, good thermal conductivity, than the major. Another feature is that because sulfides are often associated with magma, it is very easy to oxidize under the surface supergene action. Except for pyrite (6 ~ 6.5 hardness), the hardness is very low. Such minerals pyrite, chalcopyrite, galena, FeS2 CuFeS2, PbS, Sb2S3, stibnite sphalerite molybdenite, cinnabar HgS MoS2.
- Q:How to test the aluminium bricks of high alumina refractory bricks?
- Before making bricks, the raw materials are usually tested and tested to see if the aluminum content is up to standard
- Q:What is the standard size of high alumina brick?
- Standard brick: 230 x 115 x 65; four points: 230 x 115 x 40; three points: 230 x 115 x 30; 150 x 120: Brick gable. Light weight brick 1 to 1.7 kilograms; heavy clay superscript brick weighs 3.75 kilograms; light 30 plates 0.79 kilograms; light 40 plates, 1.05 kilograms.
- Q:Aluminum content 38, silicon content 55 What refractory bricks?
- High alumina brick:The mineral composition of the high alumina brick is determined by the bauxite used. The mineral composition of the clinker is usually mullite, corundum and glass. The theoretical composition of mullite is Al2O371.8%, SiO2 28.2%, and its melting decomposition temperature is 1840 DEG C. With acicular crystal, network cross structure, high temperature state showed better strength. Corundum in the form of alpha -Al2O3, melting point of 2050 degrees, hardness of Mohs 9, showing a granular and columnar crystal, has good chemical stability, acid, alkaline slag have a certain resistance. Based on the composition of mullite minerals, the phase composition of high alumina brick can be judged according to the content of Al2O3. When the bricks are below Al2O3 71.8%, the base of the composition is mullite and SiO2, such as grade LZ-48 bricks. Because it contains a large number of SiO2 formed in the liquid phase under high temperature is 20% ~ 30%; brick in Al2O3 more than 71.8%, the excess Al2O3 formed corundum crystal under high temperature, while generating 2 high temperature phase, eutectic temperature rise by the low content of Al2O3 brick 1595 C to 1840 C, such as grade LZ-75 brick. In fact, it is impossible to produce a complete phase equilibrium in the process of production, but the glass phase is very small, and there is no more than 10% in the partial gap of the Yu Jing phase
- Q:What is the density of a super high alumina brick and what is the price?
- Of course, the transaction price, please choose refractory brick manufacturer is better.
- 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 are the grades of high alumina bricks?
- According to the size of high aluminum brick is divided into: standard brick, special-shaped brick.
- Q:What are the requirements for Rubble backfill height?
- Backfill should be filled with large stones, big face, small face upward, the decoration is stable, and then use small stones leveling, the gap between the stones can be swept into the slag, gravel, so that the gap filled.
- Q:Does the chimney have high acid resistance?
- The chimney particles and gases, mostly coal tar products, material acidic, therefore, take good acid resistance, acid proof brick, Grouts also used potassium silicate clay acid is preferred.
- Q:How much is one ton of high alumina refractory brick?
- High alumina refractory brick according to the different content of AL2O3 is divided into grade, grade one and grade two, and grade three high aluminum brick, Zhengzhou Kang Hui refractories factory price in 800-1900 yuan / ton, stable quality, are exported to the domestic and foreign markets.
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High Alumina Insulating Fire Brick for Boiler/Furnace
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 10 m.t.
- Supply Capability:
- 100000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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