Ceramic Filters Have Good Thermal Shock Resistance And Are Used In
The Metallurgical Industry
Product Overview
The ceramic filter product is made by a special process and has a
foam-like porous structure. It has many advantages such as stable
chemical performance, high strength, high temperature resistance,
good thermal shock resistance, and large specific surface area. It
is widely used in Metallurgy, casting, environmental protection and
other fields. It can effectively remove large inclusions in the
liquid metal, adsorb small impurities, greatly reduce defects such
as trachoma, slag holes, pores, and inclusions, and improve
mechanical properties.
The use of honeycomb ceramics is very wide, as follows:
1. Catalyst Carrier
When honeycomb ceramics are used as catalyst carriers, they are
mainly used in automobile exhaust purification, boiler exhaust
denitration (NOx), industrial exhaust deodorization, and removal of
toxic and harmful gases.
The honeycomb ceramic catalyst carrier for automobile exhaust gas
purification is mainly a cordierite honeycomb ceramic carrier
coated with γ-Al2O3.
2. Refractory kiln furniture
The quality of extruded honeycomb ceramic kiln furniture is 60%-75%
lighter than that of traditional kiln furniture. The heat transfer
is rapid, which can achieve rapid firing. When it is used to burn
ferrite or other electronic ceramics, it is beneficial to improve
the performance of the product.
3. Wall flow filter
The porous thin-walled honeycomb ceramics can filter and purify the
carbon particles in the diesel exhaust gas (about 500 ℃).
Product parameter table
Material
Project | Alumina AL203 | Silicon carbide sic | Silicon nitride sin | Silicon nitride sin |
| Color | Ivory | black | black | Milky white, gray black |
| Content(%) | 99.5 | …… | …… | …… |
| Main features | - Excellent high frequency electrical insulation
Good wear resistance preservative Strong High hardness
| - Good high temperature strength
- High thermal conductivity
- Strong alkali resistance
- Wear-resistant
- Lightweight
| - Good high temperature strength
- Strong impact resistance
- Strong corrosion resistance
- Lightweight
| - High strength and high impact resistance
- Good self-lubricating
- Strong alkali resistance
- Smooth surface
- Good toughness
|
| The main purpose | - Wear parts
- High temperature parts
- Corrosion resistant parts
| - Machinery Seal
- Sliding parts
- High temperature parts
| - Molten metal parts
- Metal plasticity
- Processed parts
| - Industrial knives
- Pump parts
- Wear parts
|
| Density | Kg/m³ | 3.9*10 | 3.16*10 | 3.3*10 | 6.0*10 |
Mechanical behavior
| Vickers hardness | Gpa | 16.0 | 23.0 | 14.0 | 13.2 | 12.7 |
| Flexural strength | Mpa | 360 | 450 | 1020 | 1000 | 1470 |
| Compressive strength | Mpa | 2350 | …… | …… | …… | …… |
| Fracture toughness | Mpa | 4 | 2-3 | 7 | 4-5 | 4-5 |
Thermal performance
| Linear expansion coefficient | 40-400℃ | ×10-5/℃ | 7.2 | 3.7 | 2.8 | 10.5 | 10.8 |
| 40-800℃ | 8.0 | 4.4 | 3.3 | 11.0 | 11.3 |
| Thermal conductivity | W/(m·k) | 32 | 200 | 27 | 3 | 3 |
| Specific heat | J/(kg·k) | 0.78*10 | 0.67*10 | 0.65*10 | 0.46*10 | 0.46*10 |
| Thermal shock resistance (in water) | ℃ | 250 | …… | ＞800 | 300 | 350 |
| Electrical performance | Dielectric strength | V/m | 15*105 | …… | 13*105 | 11*105 | …… |
| Volume resistance(20℃) | Ω·cm | ＞1014 | 108 | 1014 | 1013 | …… |
| Dielectric constant | …… | 9.6 | …… | 9.9 | 33 | …… |
| Loss factor | ×10-4 | 10 | …… | …… | 520 | …… |
Product advantages
1. Reduce exhaust heat loss, maximize fuel utilization and reduce
unit energy consumption;
2. Raise the theoretical combustion temperature, improve the
combustion conditions, meet the high temperature requirements of
thermal equipment, expand the application range of low calorific
value fuels, especially the application range of blast furnace gas,
and increase the utilization rate of fuel calorific value;
3. Improve furnace heat exchange conditions, increase equipment
output and product quality, and reduce equipment investment;
4. Reduce the exhaust emissions and harmful gas emissions per unit
product of thermal engineering equipment, reduce atmospheric
pollution, and improve the environment.
Applications
Widely used in steel, machinery, building materials, petrochemical,
non-ferrous metal smelting and other industries.
Product Picture
The honeycomb ceramics are composed of countless equal holes of
various shapes. The large number of holes has reached 120-140 per
square centimeter, the density is 0.3-0.6 grams per cubic
centimeter, and the water absorption rate is as high as more than
20%.Due to the characteristics of porous thin walls, the geometric
surface area of the carrier is greatly increased and the thermal
shock resistance is improved. The meshed pores of the products
produced are mainly triangular and square, and the triangular
triangle has much better bearing capacity and more holes. This is
especially important as a catalytic carrier. As the number of holes
per unit area increases and the thickness of the carrier wall
decreases, the thermal shock resistance of the ceramic carrier
increases, as does the temperature of thermal shock failure.
Therefore, the honeycomb ceramic must reduce the expansion
coefficient and increase the number of holes per unit area. The
coefficient of thermal expansion is the main performance index. The
current foreign level is α25-800℃≤1.0×10-6℃-1, which has a certain
gap with the domestic comparison, but this gap is getting smaller
and smaller. The raw materials for the production of honeycomb
ceramics are mainly kaolin, talc, aluminum powder, clay, etc.,
especially the application of diatomaceous earth, zeolite,
expansive soil and refractory materials.
Product packaging
Packed in carton
FAQ
1. Are you a businessman or a manufacturer?
We are a company, we have our own factory
2. How long is your delivery time?
Negotiable
3. Can the product be customized?
Can be customized
4. What is the product packaging?
Carton or according to customer requirements
