Alumina Ceramic Furnace Tubes
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Advantage of alumina ceramic furnace tubes
1. The excellent high temperature resistance of alumina ceramic furnace tubes ensures smooth production processes, avoids production interruptions caused by furnace tube problems, and improves smelting efficiency and quality.
2. During the operation of high-temperature furnaces and vacuum furnaces, the temperature rises and falls frequently and violently. Alumina ceramic furnace tubes can adapt to this temperature change and maintain the integrity of the structure.
3. As a fitting tube in high-temperature furnaces and vacuum furnaces, precise dimensions ensure tight installation and adaptability, and good surface smoothness can reduce material adhesion and accumulation inside the tube.
4. When used in high-temperature furnaces and vacuum furnaces, the service life of alumina ceramic furnace tubes is much longer than that of ordinary metal furnace tubes or other material furnace tubes.
Application of alumina ceramic furnace tubes
1. In high-temperature furnaces such as steel and non-ferrous metal smelting, alumina ceramic furnace tubes are used as material conveying pipelines to accurately transport raw materials to high-temperature reaction areas.
2. Alumina ceramic furnace tubes can be used as isolation tubes to separate the workpiece to be processed from other parts of the furnace, ensuring that a specific gas atmosphere only acts on the workpiece and avoiding interference from external impurity gases.
3. Accurate temperature measurement is required inside high-temperature furnaces, and thermocouples are commonly used temperature measuring components. Alumina ceramic furnace tube serves as a thermocouple protective sleeve, providing reliable protection for thermocouples.
Size,Performance index
Alumina Tube(open both ends)(slip casting) Specification Table:
Number | SPEC: OD x ID | LENG TH MM | Number | SPEC: OD x ID | LENG TH MM | ||
| INCH | MM | INCH | MM | ||||
| 1 | 0.197x0.118 | 5x3 | ≤800 | 32 | 1.126x0.886 | 28.6x22.5 | ≤1800 |
| 2 | 0.236x0.157 | 6x4 | ≤1300 | 33 | 1.181x0.827 | 30x21 | |
| 3 | 0.250x0.125 | 6.4x3.2 | 34 | 1.181x0.906 | 30x23 | ||
| 4 | 0.250x0.157 | 6.4x4 | 35 | 1.260x0.984 | 32x25 | ||
| 5 | 0.250x0.188 | 6.4x4.8 | 36 | 1.375x1.125 | 34.9x28.6 | ||
| 6 | 0.276x0.157 | 7x4 | 37 | 1.378x1.063 | 35x27 | ||
| 7 | 0.276x0.197 | 7x5 | 38 | 1.496x1.181 | 38x30 | ||
| 8 | 0.315x0.197 | 8x5 | 39 | 1.575x1.181 | 40x30 | ||
| 9 | 0.354x0.236 | 9x6 | ≤1600 | 40 | 1.654x1.339 | 42x34 | |
| 10 | 0.375x0.250 | 9.6x6.4 | 41 | 1.750x1.500 | 44.5x38.1 | ||
| 11 | 0.394x0.236 | 10x6 | 42 | 1.811x1.496 | 46x38 | ||
| 12 | 0.394x0.276 | 10x7 | 43 | 1.875x1.625 | 47.6x41.3 | ||
| 13 | 0.433x0.276 | 11x7 | 44 | 1.969x1.575 | 50x40 | ||
| 14 | 0.472x0.236 | 12x6 | 45 | 2.000x1.750 | 50.8x44.5 | ||
| 15 | 0.472x0.315 | 12x8 | 46 | 2.250x2.000 | 57.2x50.8 | ||
| 16 | 0.472x0.355 | 12x9 | 47 | 2.283x1.890 | 58x48 | ||
| 17 | 0.500x0.250 | 12.7x6.4 | 48 | 2.362x1.96 | 60x50 | ||
| 18 | 0.500x0.375 | 12.7x9.5 | 49 | 2.500x2.250 | 63.5x57.2 | ||
| 19 | 0.551x0.394 | 14x10 | 50 | 2.559x2.165 | 65x55 | ||
| 20 | 0.591x0.394 | 15x10 | ≤1800 | 51 | 2.750x2.500 | 69.9x63.5 | |
| 21 | 0.630x0.472 | 16x12 | 52 | 2.756x2.362 | 70x60 | ||
| 22 | 0.669x0.472 | 17x12 | 53 | 2.956x2.561 | 75x65 | ||
| 23 | 0.688x0.437 | 17.5x11.1 | 54 | 3.000x2.750 | 76x70 | ||
| 24 | 0.750x0.512 | 19.1x13 | 55 | 3.150x2.675 | 80x68 | ||
| 25 | 0.787x0.591 | 20x15 | 56 | 3.500x3.125 | 88.9x79.4 | ≤1600 | |
| 26 | 0.866x0.630 | 22x16 | 57 | 3.543x3.150 | 90x80 | ||
| 27 | 0.866x0.669 | 22x17 | 58 | 3.937x3.543 | 100x90 | ||
| 28 | 0.945x0.709 | 24x18 | 59 | 4.000x3.650 | 101.6x93 | ||
| 29 | 1.000x0.750 | 25.4x19.1 | 60 | 4.331x3.937 | 110x100 | ≤1500 | |
| 30 | 1.063x0.669 | 27x17 | 61 | 4.500x4.125 | 114.3x105 | ||
| 31 | 1.063x0.787 | 27x20 | 62 | 4.724x4.331 | 120x110 | ||
| Number | 1 Bore tube SPEC: OD x ID | Length MM | |
| INCH | MM | ||
| 1 | 0.031x0.011 | 0.8x0.3 | ≤18500 |
| 2 | 0.039x0.019 | 1x0.5 | |
| 3 | 0.059x0.024 | 1.5x0.6 | |
| 4 | 0.079x0.039 | 2x1 | |
| 5 | 0.100x0.050 | 2.5x1.3 | |
| 6 | 0.118x0.059 | 3x1.5 | |
| 7 | 0.118x0.079 | 3x2 | |
| 8 | 0.125x0.063 | 3.2x1.6 | |
| 9 | 0.157x0.079 | 4x2 | |
| 10 | 0.197x0.118 | 5x3 | |
| 11 | 0.236x0.118 | 6x3 | |
| 12 | 0.236x0.157 | 6x4 | |
| 13 | 0.250x0.125 | 6.4x3.2 | |
| 14 | 0.250x0.157 | 6.4x4 | |
| 15 | 0.250x0.188 | 6.4x4.8 | |
| 16 | 0.276x0.197 | 7x5 | |
| 17 | 0.315x0.197 | 8x5 | |
| 18 | 0.354x0.236 | 9x6 | |
| 19 | 0.374x0.250 | 9.5x6.35 | |
| 20 | 0.394x0.236 | 10x6 | |
| 21 | 0.433x0.276 | 11x7 | |
| 22 | 0.472x0.315 | 12x8 | |
Alumina ceramic performance index (Notice of Correct in Leakeage Rate）
NO. | Property | Unit | Alumina |
1 | Al2O3 | % | >99.3 |
2 | SiO2 | % | — |
3 | Density | g/cm3 | 3.88 |
4 | Water absorption | % | 0.01 |
5 | Compressive strength | MPa | 2300 |
6 | 20℃ leakage rates | Torr・L/sec | >10-11=1.33322×10-12Pa・m3/sec |
7 | Twisting in high temperature | mm | 0.2 allowed in 1600℃ |
8 | Bonding in high temperature | not bonded in 1600℃ | |
9 | 20—1000℃ coefficient of thermal expansion | mm.10-6／℃.m | 8.2 |
10 | Thermal conductivity | W/m.k | 25 |
11 | Electric insulation strength | KV/mm | 20 |
12 | 20℃direct current insulation resistance | Ohm/cm | 1014 |
13 | High-temperature insulation resistance | 1000℃ MΩ | ≥0.08 |
1300℃ MΩ | ≥0.02 | ||
14 | Thermal shock resistance | 4 times not cracked in 1550℃ | |
15 | Maximum working temperature | ℃ | 1800 |
16 | Hardness | Mohs | 9 |
17 | Flexural strength | Mpa | 350 |
Factory Equipment
Slip casting moulding: Inject the prepared slurry into the gypsum mold and let it stand for a period of time to allow the gypsum mold to absorb moisture. The slurry forms a uniform body on the inner wall of the mold.
Injection moulding: Inject a slurry containing paraffin into a metal mold at a certain temperature and pressure, and after the body cools and solidifies, perform demolding to prepare ceramic bodies.
Extrusion moulding: Suitable for long tube products, the powder is extruded into shape through an extruder.
FAQ
Q1. Can alumina ceramic furnace tubes be reused?
A1. Yes, alumina ceramic furnace tubes can indeed be reused after they've been used, as long as they remain undamaged and free from
any contamination. It's essential to thoroughly clean and inspect them to confirm that they're still in good condition and suitable
for future use.
Q2. Is it safe to use alumina ceramic furnace tubes in high-pressure applications?
A2. Indeed, alumina ceramic furnace tubes are well-suited for high-pressure applications. Their exceptional mechanical strength, combined
with resistance to thermal and chemical stresses, renders them capable of withstanding rigorous conditions.
Q3. Can alumina ceramic furnace tubes withstand rapid temperature changes?
A3. Certainly, alumina ceramic furnace tubes demonstrate commendable thermal shock resistance, enabling them to endure rapid
temperature fluctuations without experiencing cracks or fractures.
Q4. Can alumina ceramic furnace tubes be customized according to specific environments?
A4. Indeed, numerous suppliers provide the option to customize alumina ceramic furnace tubes according to specific requirements. This
customization may involve modifications to dimensions, form, and the incorporation of additional features, ensuring alignment
with the precise needs of your application.
Q5. How long can alumina ceramic furnace tubes be used?
A5. The durability of alumina ceramic furnace tubes can differ based on factors like application conditions, operational temperatures, and
maintenance proced.
Certificate
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