Metal heating furnace

As the name suggests, a metal heating furnace is a furnace that heats metal and belongs to the thermal processing industry. Metal heating furnaces have coal heating, oil heating, gas heating and electric heating. Due to the requirements of energy saving and environmental protection, electric heating metal heating furnaces have become more popular in recent years. 1. Heating principle of electric heating metal heating furnace

1. Electric heating metal heating furnaces are divided into resistance metal heating furnaces and induction metal heating furnaces

1. The resistance type metal heating furnace adopts the resistance wire heating method. When the current flows through the conductor, because any conductor has resistance, the electrical energy is lost in the conductor and converted into heat energy, according to Joule Lenz’s law:

Q=0.24I2 Rt Q—heat energy, card; I—current, ampere 9R—resistance, ohm, t—time, second.

Calculated according to the above formula, when 1 kilowatt-hour of electric energy is completely converted into heat energy, Q=(0.24×1000×36000)/1000=864 kcal. In electric heating technology, it is calculated as 1 kilowatt hour = 860 kcal. The electric furnace is a device that converts electrical energy into thermal energy in structure, which can be used to heat the designated workpiece efficiently and maintain high efficiency.

2. The induction metal heating furnace is a power supply device that converts the power frequency 50HZ alternating current into intermediate frequency (above 100HZ to 10000HZ) through the intermediate frequency power supply, converts the three-phase power frequency alternating current into direct current after rectification, and then changes the direct current into adjustable The intermediate frequency current supplies the intermediate frequency alternating current flowing through the capacitor and the induction coil, generates high-density magnetic lines of force in the induction coil, and cuts the metal material contained in the induction coil, generating a large eddy current in the metal material, thereby The metal itself generates heat to achieve the purpose of heating.

2. The advantages of induction metal heating furnace:

1. The induction metal heating furnace can work continuously for 24 hours. Using the principle of electromagnetic induction, a large eddy current is rapidly induced inside the metal material in the alternating magnetic field, so that the metal material heats up until it melts. The metallic material is heated locally or completely rapidly.

2. Induction metal heating furnaces rarely have problems. If there is a problem, 90% is caused by insufficient water pressure or water flow. It is recommended to use an internal circulating water system, that is, a closed cooling tower, to cool the intermediate frequency heating furnace, which is economical and cost-effective.

3. The heating rhythm of the induction metal heating furnace can be designed according to the productivity. The heating speed is designed according to the heating power, heating temperature and the weight of the heating workpiece. The heating speed can be up to 1 second and can be adjusted arbitrarily.

4. The induction metal heating furnace has a wide heating range, can have various forms of heating, and can heat a variety of workpieces (removable induction coils can be replaced according to the shape of the workpiece), such as end heating, overall heating, steel

5. It is very convenient to replace the sensor of the induction metal heating furnace, that is, the furnace head, and the replacement of the sensor can be completed within a few minutes.

6. The operation of the induction metal heating furnace is simple. The power can be raised and lowered only by rotating the power knob. The whole operation can be learned to start quickly in a few minutes, and the heating can be started after the water is turned on.

7. The induction metal heating furnace belongs to direct heating, because the internal heating of the metal is heated separately, and there is no heat loss of radiation conduction heating, so it consumes less power, less heat loss, less specific friction, and less energy consumption than other similar products. 20 %

8. The induction metal heating furnace has good heating performance, good heating uniformity and high overall effect. The intermediate frequency electric furnace heats very uniformly (the density of the induction coil can also be adjusted to obtain the required temperature for each part of the workpiece).

9. The induction metal heating furnace has various protection functions to reduce the use of failures and the power is adjustable. Stepless adjustment of output power protection: with overvoltage, overcurrent, overheating, water shortage and other alarm indications, and automatic control and protection.

10. The induction metal heating furnace is safe and reliable. It is equipped with alarm indications such as overvoltage, overcurrent, overheating, and water shortage, and is automatically controlled and protected. No high pressure, safe for workers to operate.