The Electric Ceramic Radiant Tube Heater developed and produced by our factory. Our factory has a mature production line that can produce quickly
Product: Electric Ceramic Radiant Tube Heater
Material: Cr20ni80, Cr25al5, OCr27al7mo2
Weight: 2kgs-5kgs,
Aspect: customer requirements
Voltage: 30V-220V, can be customized
Power: 2kw-40kw, can be customized
After-sales service: provide support from 30 overseas parties
Trademark: TS
Transport packaging: wooden box for export
Specifications: Size (length * width * height): 46 * 650mm, can be customized
Place of Origin: Guangdong, China
Shape: Radiant Tube Heater
Category: Heating Elements
Application: Electric heating system
Introduction of Electric Ceramic Radiant Tube Heater
The Radiant Tube Heater is composed of a resistance wire welded at the ends of the U-shaped axial arrangement and a ceramic support frame. There is no shield between the inner core and the outer protective sleeve, and the heat dissipation is good.
Material comparison:
The first:
a: Radiant Tube Heater with a rated working temperature of 1000 degrees, the resistance wire is made of Cr20Ni80 or 0Cr21Al6Nb, and the surface working temperature can reach 1200 degrees. The working temperature of the electric radiant tube with this material can reach 1000 degrees, and the support frame is corundum ceramics.
b: The outer protective sleeve is a cold-drawn seamless thin-walled heat-resistant steel pipe, the material is 1Cr25Ni20Si2 or 1Cr25Ni35Si2.
c: 1Cr25Ni20Si2 or 1Cr25Ni35Si2 has good high-temperature oxidation resistance, high-temperature creep strength, and certain anti-carburization performance.
d: The design of this Radiant Tube Heater is perfect
e: The material safety factor of this Radiant Tube Heater is relatively high.
The second
a: Radiant Tube Heater with a rated working temperature of 1200 degrees, the resistance wire is made of 0Cr27Al7Mo2 or Ganghua brand HRE heating wire, the surface working temperature can reach 1400 degrees, the short-term working temperature of this material is 1250 degrees, the support frame It is corundum ceramics.
b: The outer protective sleeve is a cold-drawn seamless thin-walled heat-resistant steel pipe made of Fe-Ni-Cr-Al-Re alloy.
c: Fe-Ni-Cr-Al-Re alloy has ultra-high oxidation resistance. It can work for a long time at 1300 degrees in an oxidizing atmosphere and has short-term oxidation resistance at 1360 degrees.
d: This Radiant Tube Heater is suitable for working in high temperature, low oxygen partial pressure, and environments containing S and C.
Features of Electric Ceramic Radiant Tube Heater:
1. Made of seamless cold-drawn heat-resistant steel pipes (temperature of 1200 degrees) made of high-quality raw materials
2. The inner core adopts resistance wire U-shaped axial arrangement end welding method
3. The resistance wire and the ceramic frame are basically unshielded, and the temperature difference between the resistance wire and the furnace is small, and the heat dissipation is good
4. Working temperature is 1000 degrees or 1200 degrees
5. The biggest advantage of the radiant tube produced by our company is the use of seamless cold-drawn, thin-walled heat-resistant steel pipe (1Cr25Ni20Si2 or 0Cr25Ni20Si2), and its heat radiation is 10% higher than similar products
6. Use more than 8000h
The Electric Ceramic Radiant Tube Heater developed and produced by our factory. In addition to supporting various heat treatment equipment factories in China, it can also research, design, and manufacture heaters for non-standard products for users. According to the situation of use, they can be divided into heat-resistant steel seamless pipes, plate ring welded pipes, centrifugal cast pipes, and non-standard products. Metal casing, etc.
In the production process, our factory strictly controls every step
(1) Electric heating materials
The heating wire is required to have a high degree of heat resistance; the material has no impurities, no segregation, and strong oxidation resistance; in the process of use, it does not deform, penetrate, or leak.
| Material | Cr | Ni | AL | Mn | p | s | c | Fe |
| Cr20Ni80 | 20~23 | small amount | ≤0.5 | ≤0.6 | ≤0.02 | ≤0.02 | ≤0.08 | ≤1.00 |
| 0Cr25AL5 | 23~26 | ≤0.06 | 4~7 | ≤0.07 | ≤0.02 | ≤0.02 | ≤0.06 | small amount |
| 0Cr21AL6Nb | 21~23 | ≤0.06 | 5~7 | ≤0.07 | ≤0.02 | ≤0.02 | ≤0.05 | small amount |
| 0Cr27AL7Mo2 | 26~28 | ≤0.06 | 5~7 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.05 | small amount |
(2) Refractory materials
The refractory material is required to be corundum ceramics. During the working process of the radiant tube, it has high high-temperature strength and high-temperature insulation capacity and does not break or leak.
Performance | Index |
| Refractoriness ℃ | 1650 |
| Volume density g/cm3 | 2.8-3.0 |
| Appearable porosity/% | 15-18 |
| Thermal expansion/% | 0.6-0.8 |
| Thermal shock stability℃/Water cooling | 80 |
(3) Protective cover
When the OCr25Ni20Si2 outer cover used in our factory generates heat locally, the tube body deforms very little, which has no effect on the heating element and the working environment in the furnace; it has a strong heat resistance and the normal use time is 6000~10000 hours.
| Steel | C | Si | Mn | P | S | Cr | Ni |
| 1Cr25Ni20Si2 | 1.5-2.5 | ≤1.5 | ≤0.03 | ≤0.03 | ≥24.0 | ≥18.4 |
(4) Production process
a: The heating wire has no cracks during the straightening process;
b: During the welding process of the electric heating wire, the welding meat is full and smooth, without overheating segregation and false welding.
c: After a large number of customers have used it, it is confirmed that under normal working temperature and load, The Electric Ceramic Radiant Tube Heater produced by our factory can be used for more than 8000 hours in a variety of furnaces.
Advantages of Electric Ceramic Radiant Tube Heater
(1) The controllability of the atmosphere in the furnace can be ensured;
(2) Temperature control, installation, and maintenance are more convenient, and it is easy to seal;
(3) Since there is no muffle tank (combustion device) in the furnace, the furnace volume is enlarged and the production capacity is improved;
(4) Strong heating capacity and high efficiency;
(5) Save heat-resistant steel.
Use and maintenance of The Electric Ceramic Radiant Tube Heater
1. Use
(1) Prohibit long-term over-temperature and overload use
(2) When the furnace temperature is at a high temperature of 400℃, no rapid cooling is allowed;
(3) Do not touch the radiant tube during loading and discharging;
(4) When the furnace is working, always pay attention to whether the traffic lights on the control panel are normal, and the traffic lights should be exchanged once after a period of time during heat preservation to avoid burning the radiant tube due to the failure of the control switch;
(5) Pay attention to the working conditions of the instrument at any time, and analyze and deal with it in time when the furnace temperature and the indicator indication are found to be abnormal;
(6) For furnaces with a capacity of more than 100KW, each heating zone should be equipped with an ammeter for inspection, and each phase of the three-compartment high-temperature electric furnace should be equipped with an ammeter.
2. Maintenance
(1) After three to four months of use, take out the radiant tube heater, pour out the dust in the radiant tube heater, and turn the radiant tube heater 180° to use;
(2) Pay attention to the positive and negative poles of the radiant tube heater, and exchange the positive and negative poles every three to four months;
(3) After pulling out the radiant tube, when disassembling the terminal, be careful not to hit or knock the lead rod;
(4) The bolts leading out the terminal clamp are prone to oxidation and loosening and should be checked and tightened regularly.
Common process elimination methods
| Serial number | Failure phenomenon | cause | elimination method |
| 1 | component short circuit | 1. The resistance wire is in contact with the steel pipe | 1. The resistance wire should be annealed and wound tightly |
| 2. Improper transition of resistance wire between 2 core tubes | 2. Adopt a reasonable transition method | ||
| 3. The heat-resistant core tube or porcelain plate is broken | 3. Choose the material and be careful not to break it | ||
4. Too much oxide scale falls off the bottom of the tube | 4. Place refractory bricks at the bottom of the pipe | ||
| 5. Within the control range of material size | |||
| 2 | core tube or porcelain tube fracture | 1. The quality of heat-resistant porcelain parts is not good | 1. Pay attention to the quality of porcelain parts |
| 2. The flame contacts the porcelain part during gas welding | 2. Avoid flame contact with porcelain parts | ||
| 3. Severe collision or vibration during installation | 3. Avoid collision and vibration | ||
| 4. Heating is too rapid during use | 4. Choose materials and improve the structure | ||
| 3 | radiant tube cracking | 1. The welding material is not good | 1. Choose welding materials |
| 2. Improper welding operation | 2. Welding according to specifications | ||
| 4 | radiant tube deformation | 1. The material of the radiant tube is not good | 1. Choose the material |
| 2. Improper lifting or thermal stress deformation | 2. Hang it correctly, if there is any deformation, take measures in time | ||
3. Placed horizontally, improper force | 3.When placed horizontally, a support frame should be provided |
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