Light Weight High Alumina Brick For Thermal Equipment Insulating Layers
Special size and OEM Service also provide!
The size is precise, providing kinds of shapes according to customer's drawing
Weihang supply several grades of mullite insulating brick for use in applications from 1260°C to 1760°C.Each grade of brick is formulated to meet specific thermal and physical requirements.After firing each brick is machined to close dimensional tolerances.
Insulating bricks are manufactured utilising exceptionally high purity clays and other ceramic materials.The carefully graded organics which are used during the manufacturing process burn out during firing to give a uniform pore structure.
| Item |
Unit |
Wear-resistant refractory brick |
| NMZ-1 |
NMZ-2 |
NMZ-3 |
| Chemical composition |
Al2O3 |
% |
≥85 |
≥75 |
≥65 |
| SiO2 |
% |
≤15 |
≤25 |
≤35 |
| Fe2O3 |
% |
＜1.0 |
≤1.2 |
≤1.5 |
| Density |
g/cm3 |
≥2.9 |
≥2.6 |
≥2.5 |
| Compressive strength (normal temperature) |
Mpa |
≥100 |
≥85 |
≥70 |
| Apparent porosity |
％ |
≤18 |
≤20 |
≤21 |
| Abrasion resistance |
cc |
≤6 |
≤7 |
≤8 |
| Refractoriness |
℃ |
≥1790 |
≥1790 |
≥1790 |
|
Linear change on heating
(900℃×3h)
|
％ |
≤0.05 |
≤0.1 |
≤0.1 |
| Thermal conductivity(350℃) |
w/m.k |
≤1.8 |
≤1.8 |
≤1.5 |
| Thermal shock stability(1100℃Water cooling) |
|
20 |
20 |
20 |
Details:
1. Made by flint clay clinker and binder,through Crushing,Mixing,Shaping,Drying and high temperature Sintering.
2. Al2O3 content is 30%-48%,SiO2 content is 50%-65%,and a small number of alkali metals,alkaline earthmetal oxides TiO2,Fe2O3 etc.3.Working temperature:less than 1350°C.
Features:
1. Good resistance to abrasion and corrosion,
2. Good volume stability at high temperature,
3. Chemical attack to provide long service life,
4. Easy operation and installation,
5. Broad usage or applications and low price.
Application:
It is widely used as a primary hot face refractory lining or as back-up insulation behind other refractory in furnace(such as carbon furnace, cracking furnace, heating furnace for oil refining, roller kiln, tunnel kiln.), flues, refining vessels, heaters, regenerators and similar high temperature industrial equipment.
Quality Assurance
The quality assurance system consists of the following steps:
a. Inspection and Control of incoming raw materials:According to the chemical content,raw materials are classified into different levels to ensure quality of brick first.
b. Inspection and control of the process:During the production,every brick will be weighed twice strictly to reduce the error of weight .
c. Inspection of product Standardization of quality of each product by process control and experimentation.
d. Taking corrective measures whenever deviations are noted.
e. Quality audit by quality management.Before delivery, the inspectors will inspect the size,appearance,physical and chemical properties of brick again in factory.
Factory show:
Packing and delivery:
Packing of Insulating brick: Standard export wooden pallet with cardboard.
Shipping of Insulating brick: By vessel or by train from any Chinese port,
Samples can be delivered by International express.
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