What is the difference between an electric arc furnace and an induction melting furnace?
Induction melting furnaces, electric arc furnaces are all kinds of electric furnaces. Many people can't tell the difference between the two. They are always confused. Today, we analyze the difference between induction melting furnace and electric arc furnace from the characteristics and classification.
Features:
An electric arc furnace is an electric furnace that smelts ore and metal at a high temperature generated by an electrode arc. When the gas discharge forms an arc, the energy is concentrated, and the arc temperature is above 3000 °C. For smelting metals, the electric arc furnace has greater flexibility than other steelmaking furnaces, and can effectively remove impurities such as sulfur and phosphorus. The furnace temperature is easy to control, and the equipment has a small footprint, which is suitable for the melting of high-quality alloy steel.
The induction melting furnace is a power supply device that converts the power frequency 50HZ alternating current into an intermediate frequency (300HZ or more to 1000HZ), converts the three-phase power frequency alternating current into a direct current, and then converts the direct current into an adjustable intermediate frequency current. 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 to generate a large eddy current in the metal material.
Classification:
There are many ways to classify electric arc furnaces.
According to the melting form of the electrode
(1) A non-consumable electrode type electric arc furnace which uses tungsten or graphite as an electrode, and the electrode itself does not consume or consume little during the smelting process.
(2) Consumable electrode type electric arc furnace, which uses the metal to be smelted as an electrode, and the metal electrode is melted while being consumed by itself.
According to the control method of arc length
(1) Constant arc voltage automatic control type electric arc furnace, which relies on the voltage between two poles to be compared with a given voltage, and the difference is driven by the signal amplification to drive the self-consumption electrode to keep the arc length constant.
(2) Constant arc length automatic control arc furnace, which relies on constant arc voltage to approximately control the constant length of the arc.
(3) Droplet pulse automatic control arc furnace, which automatically controls the constant arc length according to the pulse frequency generated during the formation and dripping of the metal droplet and the relationship between the pulse duration and the arc length.
Divided into jobs
(1) A periodic operating arc furnace, that is, one cycle per smelting furnace.
(2) Continuous working electric arc furnaces, which have two forms. One is the rotating type of the furnace body; the other is that the two furnaces share one DC power supply, that is, when one furnace is smelted, the power is switched to another furnace and the melting of the next furnace is started immediately.
Divided into furnace structure
(1) Fixed electric arc furnace.
(2) Rotary electric arc furnace.
Induction melting furnaces have only one classification, which is classified according to tonnage. For details, refer to the classification of induction melting furnaces.
