High Alumina Brick Refractory Bricks High Aluminum Half Bar Brick
Special size and OEM Service also provide!
The size is precise, providing kinds of shapes according to customer's drawing
High Alumina Bricks manufacturing process is similar to much grog clay brick, the different is there are higher proportion of grog in ingredients that can reach 90~95%. Select and screening deironing before the grog crushed. Firing temperature is higher, as of Grade I &II high alumina bricks fired in the tunnel kiln is 1500~1600 ℃.Chinese production practice shows that select, grading and keep in storage high alumina grog before crushed. Adopt fine grinding methods calcined bauxite and mixed clay to improve product's quality.
1. CT firebricks are made from high-purity refractory clays, temperature of use ranging from 1100 oC to 1700 oC, each grade is formulated to meet specific thermal and physical requirements.
2. With graduated additions of alumina for higher temperature products
3. Carefully grade d organic filler
4. The organic filler burns out during manufacture to give a uniform, control 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) |
次 |
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.
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
1.Pallet+Paper or Steel angle bead+Paper board +Plastic or Steel belt +Plastic film
(1)Wooden pallet size:Usually0.92*0.92m(standard brick),but 1*1m (special shape brick)at most,
(2)Load weight of each pallet:Usually 1.5-1.7Tons,but 2.0 Tons at most.
(3)20 Foot Container can be loaded 25-26Tons at most,about 13-16Pallets.
2.Can make the package according to customer's requirements.
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