High Temperature Electric Heat Radiant Tube Bright surface

High temperature electric heat radiant tube

The inner core of the radiant tube is composed of a U-shaped axial arrangement end welded resistance wire and a ceramic support frame.There is no shield between the inner core and the outer protective sleeve, good heat dissipation.The electric heating radiation tube with rated working temperature of 1000 degrees, the material of the resistance wire is Cr20Ni80 or 0Cr21Al6Nb, the surface working temperature can reach 1200 degrees, and the maximum working temperature of the electric heating radiation tube with this material can reach 1000 degrees.The support frame is a high aluminum ceramic piece. The outer protective sleeve is a cold-drawn seamless thin-wall heat-resistant steel pipe made of 1Cr25Ni20Si2 or 1Cr25Ni35Si2. The material has good high temperature oxidation resistance, high temperature creep strength, and certain carburizing resistance. The design and material selection of the radiation tube have a large safety factor.

The electric heating radiation tube with a rated working temperature of 1200 degrees, the resistance wire is made of 0Cr27Al7Mo2, and the surface working temperature can reach 1400 degrees. The maximum working temperature of the electric heating radiation tube with this material is 1250 degrees for a short time, and the support frame is steel jade porcelain.

The outer protective sleeve is a cold-drawn seamless thin-wall heat-resistant steel pipe made of Fe-Ni-Cr-Al-Re alloy, which has ultra-high oxidation resistance and can work for a long time at 1300 degrees in an oxidizing atmosphere and for a short time at 1360 degrees. Suitable for working in high temperature, low oxygen partial pressure and S, C environment.
In addition to supporting domestic heat treatment equipment manufacturers, the electric heat radiation tube developed and produced by our factory can also be used for user research and design of non-standard product heaters, which can be divided into heat-resistant steel seamless pipes, plate coil welded pipes, centrifugal casting pipes and non-metallic casings according to the use of the occasion.

Features of high temperature electric heat radiant tube:
1.Manufactured from seamless, cold-drawn heat-resistant steel pipes (up to 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 ceramic frame are basically no shielding, and the temperature difference between the resistance wire and the furnace is small.
4.The maximum operating temperature is 1000 degrees or 1200 degrees.
5.The biggest advantage of the radiant tube produced by the company is the use of seamless cold-drawn, thin-walled heat-resistant steel pipe (1Cr25Ni20Si2 or 0Cr25Ni20Si2), and the thermal radiation of its products is 10% higher than that of similar products.
6.Use more than 8000h

(1)Electric heating materials
High heat resistance of heating wire is required; The material has no impurities, no segregation, and strong oxidation resistance; In the process of use, no deformation, no breakdown, no loopholes.

(2)refractory matter
The required refractory material is corundum, and in the process of radiation tube work, it has a high temperature strength and high temperature insulation capacity, no fragmentation, no leakage.

(3)Protective cover
The OCr25Ni20Si2 cover used by our factory has minimal deformation of the tube body when it is locally heated, and has no effect on the heating element and the working environment in the furnace; Strong heat resistance, normal use time of 6000~10000 hours, for the domestic leading level.

(4)Production process
During the straightening process of the electric heating wire, there is no crack; During the welding process, the welding flesh is full and smooth, without overheating segregation and virtual welding phenomenon.
After a large number of customers have used it that under normal working temperature and load, the electric heating radiant tubes produced by our factory are more than 8000 hours in a variety of furnaces.
 

Radiant tubes have the following advantages
(1)It can ensure the controllability of the atmosphere in the furnace
(2)Temperature control, installation and maintenance are convenient and easy to seal
(3)Since there is no muffle tank in the furnace, the furnace volume is expanded and the production capacity is increased
(4)Strong heating capacity and high efficiency
(5)Saving heat resistant steel

Product use and maintenance
1.Usage
(1)It is forbidden to use for a long time over temperature and overload.
(2)When the furnace temperature is 400 °C, it must not be rapidly cooled.
(3)Do not touch the radiation tube during loading and discharging.
(4)When the furnace is working, often pay attention to whether the traffic light on the control panel is normal, and the traffic light should be exchanged once after a period of time when keeping warm, so as not to burn the radiation tube due to the failure of the control switch.
(5)Pay attention to the working condition of the instrument at any time, and analyze and deal with it in time when the furnace temperature and the instrument indication are abnormal.
(6)For furnaces with a capacity of more than 100KW, each heating zone should preferably be equipped with an ammeter for inspection, and an ammeter should be installed in each phase of the three-box high-temperature electric furnace.
2. Maintenance
(1)After three to four months of use, pull out the radiation tube, pour out the dust inside the radiation tube, and turn the radiation tube 180°.
(2)Pay attention to indicate the positive and negative poles of the radiation tube, and exchange the positive and negative poles once every three to four months.
(3)After the radiation tube is removed, be careful not to hit or knock the lead rod when removing the terminal
(4)The bolts leading out the terminal clamps are prone to oxidation loosening and should be checked and tightened regularly