Mullite Products, Mullite ceramic honeycomb, Special heat storage ball
Special high aluminum regenerative ball for steel plant
With the rapid development of regenerative industrial furnace, the research and production of thermal mass in regenerative heating furnace has also reached a certain scale. Currently, the different manufactures have adopted different production techniques. There is limited experience in producing regenerative ball at present market, which has caused passive situation. Then, the users have to replace the regenerative ball in short time duration.
In consideration of various factors in the production and application of regenerative ball, KSINO has developed the special high aluminum regenerative ball for regenerative heating furnaces in steel plant. It has advantages of high strength, excellent wear resistance, high thermal conductivity & heat capacity, high thermal efficiency, and excellent thermal stability. The special high aluminum regenerative ball can be reused. In the application, it will be not easy to break.
Main physical and chemical indexes
|
Item |
YT—70 |
|
Al2O3(%); ≥ |
70 |
|
Volume density (g/cm3)≥ |
2.5 |
|
Packing unit weight（Kg/ m3） |
1500～1600 |
|
Specific surface area（ m2/ m3） |
200～220 |
|
Compressive strength（N/ ball） |
14000 |
|
Reference value of specific heat capacity（×103/Kg K） |
1.1 |
|
Thermal conductivity at 1000℃（W/M．K） |
1.5 |
|
Applicable temperature（℃）;≥ |
1450 |
Special physical and chemical indexes of corundum mullite for steel mills
|
Physical and chemical indexes |
|
|
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Refractoriness（℃） |
|
|
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Chemical composition |
AL2O3（％） |
78 |
|
Volume density g/cm3 |
2.7 |
|
|
Packing unit weight（Kg/m3 ） |
1600-1700 |
|
|
Specific surface area（ m2/ m3） |
200-220 |
|
|
Compressive strength（N/ ball） |
15000 |
|
|
Applicable temperature（℃） |
≥1650 |
|
|
Thermal conductivity at 1000℃（W/M．K） |
1.4 |
|
|
Specific heat capacity（×103J/Kg. K） |
1.1 |
|
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Packaging: plastic woven bag Specification: 25kg/ bag |
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Note: KSINO can customize various models of products based on customer requirements. Welcome to your inquiry！ |
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Mullite Regenerator balls specially used in aluminum plants
Mullite regenerator balls specially used in aluminum plants are made of mullite and other materials with more stable heating stability based on the development of high aluminum regenerative ball. It makes stronger thermal shock stability and resistance to extreme cold and extreme heat of regenerator balls in the heat storage box during the continuous commutation of cold and hot gases. Its performance is better than that of ordinary high aluminum regenerator balls.
Main specifications: Φ18mm Φ20mm Φ22mm Φ25mm
Physical and chemical indexes
|
project |
YT—70 |
|
Al2O3(%); |
≥75 |
|
Volume density (g/cm3) |
≥2.5 |
|
Packing unit weight（Kg/ m3） |
1450～1550 |
|
Specific surface area（ m2/ m3） |
200～220 |
|
Compressive strength（N/ ball） |
15000 |
|
Reference value of specific heat capacity（×103/Kg K） |
1.2 |
|
Thermal conductivity at 1000℃（W/M．K） |
1.6 |
|
Applicable temperature（℃）;≥ |
1450 |
Ceramic honeycomb is mainly used for heat storage in heating furnaces of steel mills and smelting furnaces of aluminum industry. It has the characteristics of fast heat transfer, large heat storage, good thermal conductivity and so on.
High Temperature Air Combustion (HTAC) adopts ceramic honeycomb regenerator. Honeycomb ceramic regenerator is adopted to expand the flame combustion area by organizing oxygen poor combustion. The flame boundary almost extends to the furnace boundary, which makes the temperature in the furnace evenly distributed. In this situation, the emission of NOx in the flue gas can be reduced by more than 40%. The increase of the average temperature in the furnace strengthens the heat transfer in the furnace. Compared with the same sized thermal equipment, its output can be increased by more than 20%, while the equipment cost is decreased. With the help of high-temperature preheated air or high-temperature preheated gas, low calorific value fuel can achieve higher furnace temperature. This expands the application range of low calorific value fuels.
Product specifications
SPECIFICATION
Specifications: 100x100x100, 150x100x100mm, etc
Number of holes: 3mm, 3.5mm, 4mm, 5mm, 6mm, 8mm, etc
Types of hole: square, hexagonal, round, etc
Sizes：100x100x100、150x100x100mm others.
▪ Cells：3mm、3.5mm、4mm、5mm、6mm、8mm and others.
▪ Holeshapes：square, rotundity, hexagon and others
Product Parameters
| Items | Materials | |||
| Cordierite | Mullite | Corundum mullite | ||
| Volume density（g/cm3） | 1.5-1.9 | 2.0-2.5 | 2.3-2.7 | |
| Coefficient of thermal expansion (*10-6/K-1) (20-1000°C) | ≤3 | ≤5 | ≤6 | |
| Specific heat (J/Kg.k)(20-1000°C) | 900-1150 | 1000-1150 | 1100-1300 | |
| Thermal conductivity (W/m.K)(20-1000°C) | 1.2-1.8 | 1.5-2.0 | 1.5-2.0 | |
| Thermal shock strength (°C ) | ≥350 | ≥350 | ≥300 | |
| Water absorption (%) | ≤20 | ≤20 | ≤20 | |
| Softening temperature (°C) | 1250 | 1450 | 1550 | |
| Chemical composition | AI2O3 | 35-45 | 60-70 | 70-80 |
| SIO2 | 45-55 | 25-35 | 15-25 | |
| MgO | 12-14 | 1-3 | 1-3 | |
| Fe2O3+TlO2 | 1-4 | 1-4 | 1-4 | |
| Others | <5 | <5 | <5 | |