The working principle of heating tube and heating rod

What is the principle of the heating rod heating tube?

The working principle of the heating tube and heating rod:

Heating tube-magnesium oxide powder used in electric heating tube is a crystalline magnesium oxide powder with good heat resistance, thermal conductivity and insulation, it is placed in a metal tube, tightly filled in the gap part, and treated by other processes , has good heat resistance, thermal conductivity and insulation. The most commonly used electric heating element is the electric heating wire, which is used for heating after charging, and converts electric energy into heat energy. The electric heating wire itself is a metal conductor. When current flows through a conductor, the current generates a certain amount of heat, which is transported by the conductor.

 There are generally two types of electric heating wires, namely iron-chromium-aluminum alloy electric heating wire and nickel-chromium alloy electric heating wire. The difference between the two is that the working temperature of FE-CR-AL alloy material can reach 1400 ℃, which is enough to meet the needs of electric heating tubes. However, the nickel-chromium wire has good flexibility and good oxidation resistance, and the iron-chromium-aluminum wire is relatively brittle. Nickel-chromium wire has good plasticity, long use time, and is not easy to deform. The price of FE-CR-AL alloy wire is lower, and the price of NI-CR alloy wire is higher. A good heating tube generally uses nickel-chromium alloy wire. Some enterprises have to charge separately, and use iron, chromium and aluminum to tell customers to use nickel-chromium wire. Generally, the price of nickel-chromium wire electric heating pipes will not be very low, so customers cannot be fooled by the price.

 Heating tube-heating rod is easy to use, and many industries now use heating tube or heating rod for heating, such as various nitrate tanks, water tanks, oil tanks, acid-base tanks, chemical industry, medical treatment, plastic machinery, mold heating, metallurgy Machinery, ceramic glass processing, fusible metal furnaces, air heating furnaces, drying ovens, hot pressing molds and other equipment.