High Alumina JM28 Insulating Firebrick Lightweight Mullite Brick Refractory Brick
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1000 pc
- Supply Capability:
- 2000000 pc/month
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FEATURES:
Low thermal conductivity
High purity and low iron content
Good thermal shock resistance
Superior thermal shock resistance
Accurate dimension and easy cutting
TYPICAL APPLICATIONS:
Cracking Furnace
Conversion Furnace
Heating equipment
Refining equipment
Reproduction equipment
Hot Blast Stove
ADVANTAGES OF OUR BRICKS:
White and smooth appearance
Correct size and cut
Pure raw materials
Standard open porosity
High strength
Low shot content
DIMENSIONS:
Standard dimensions:
230X114X64mm
230X114X76mm
Customized production for bricks with special dimension is available
Shaped bricks such as arch or key can be produced according to the drawings
PACKAGES:
Packed in carton box:
Bricks are paved inside the cartons and normally,8 or 10 pcs bricks per carton box, this way of package is suitable for the procurement is samll quantities.
Packed in wooden pallet:
Bricks are paved onto the pallet in a row,each layer shall be separated and the wooden case is wrapped by film,the cardboard around the four sides of pallet will protect bricks in the transportation.
230X114X65mm,668pcs/pallet
230X114X75mm,560pcs/pallet
SPECIFICATIONS:
Description |
Grade 23 |
Grade 26 |
Grade 28 |
Grade 30 |
Chemical Composition (%) | ||||
Al2O3 | 42 | 56 | 67 | 73 |
SiO2 | 55 | 41 | 30 | 24 |
Fe2O3 | ≤1 | ≤0.8 | ≤0.7 | 0.7 |
K2O + Na2O | ||||
Physical Properties | ||||
Density (kg/m3) | 600 | 800 | 900 | 1000 |
Classification Temperature (℃) | 1300 | 1400 | 1500 | 1550 |
Cold Crushing Strength (MPa) | 1.2 | 1.8 | 2.5 | 3.3 |
Modulus of Rupture (MPa) | 1.0 | 1.7 | 2.3 | 3.1 |
Permanent Linear Change (%) x 24hrs | ≤0.6 | ≤0.6 | ≤0.8 | ≤0.9 |
Thermal Expansion (%) 1000 ℃ | 0.5 | 0.52 | 0.52 | 0.53 |
Thermal Conductivity (W/m.k) | ||||
350 ℃ | 0.18 | 0.25 | 0.33 | 0.38 |
400 ℃ | 0.20 | 0.29 | 0.35 | 0.40 |
600 ℃ | 0.24 | 0.32 | 0.37 | 0.42 |
- Q: What are the high aluminum bricks made of?
- We specialize in the production of various LeiBao refractory refractory material, such as corundum, zirconia products, alumina hollow ball products, mullite products and so on.
- Q: How are the high alumina bricks fired?
- According to the quality requirements of different grades of high alumina brick, choose different grades of bauxite raw materials, it is conducive to rational use, fine materials, fine distribution, as far as possible not to use mixed grade severe raw materials. The quality of the clinker depends on the calcination temperature, calcination temperature, sintering temperature should be generally reached or slightly higher than that of alumina clinker sintering, to ensure the full and possible high volume density, and the two secondary Mullitization and sintering shrinkage effect in calcination process. Lightweight high alumina brick, also known as high aluminum insulation brick (high-aluminium heat insulating brick). A lightweight refractory consisting of mullite and glass phases or corundum in excess of 48%. The volume density is 0.4 ~ 1.35g/cm3. The porosity is 66% ~ 73%, and the compressive strength is 1 ~ 8MPa. Better thermal shock resistance.
- 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: Can high alumina brick resist carburizing?
- It is heavy brick mullite brick, brick to do the heavy weight to more than 2.4 manufacturers can achieve a few feeling
- Q: How to reduce porosity of high alumina brick
- High alumina brick used as refractory products in refractory material, has a great application in masonry kilns, insiders pointed out that the quality of high alumina brick general porosity and it has a great relationship! So, how to reduce the porosity of high alumina brick rate is very important!
- Q: What kinds of minerals are there in the five major categories of ore crystal chemistry?
- Halide. A few species, about 120 species, accounting for only 0.1% of the earth's crust. Most of them formed in the surface conditions, forming a salt mineral, containing less pigment ions, light color, low hardness, generally less than 3.5. Common mineral halite (NaCl), potassium (KCl), fluorite (CaF2) etc..
- Q: What is the apparent porosity of high alumina brick?
- Total porosity is porosity refers to the total volume of sample porosity in the percentage of total volume of samples. Apparent porosity refers to the percentage of the total volume of openings, pores, and total specimens in the sample.
- Q: Is glass wool inorganic thermal insulation material?
- The characteristics of glass wool, glass wool is the molten glass fibrosis, the formation of cotton like material, chemical composition of glass, is a kind of inorganic fibers. With good forming, small volume density, thermal conductivity, both thermal insulation, sound-absorbing performance, corrosion resistance, chemical stability.
- Q: What are the lining structures of lime rotary kilns and what are the requirements for refractories?
- The rotary kiln lining structure of rotary kiln and requirements on refractories calcining active lime according to the general output is divided into Nissan 300t, 400 t, 600 t, 800 t, 1000 t, 12000 t of kiln type, calcining zone temperature at 1350 degrees celsius. The kiln is divided into a discharge end, a cooling zone, a burning zone, a preheating zone and a feeding end, and the temperature of each section of the kiln ranges from 1000 DEG C to 1350 DEG C, and the requirements for refractory materials are different. The kiln refractory materials not only to withstand the high temperature impact, but also need to bear the material erosion, kiln rotation stress produced, so not only on the physico-chemical properties of refractory materials have strict requirements, but also for the construction of brick should be strictly.
- 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.
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High Alumina JM28 Insulating Firebrick Lightweight Mullite Brick Refractory Brick
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1000 pc
- Supply Capability:
- 2000000 pc/month
OKorder Service Pledge
OKorder Financial Service
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