What is the essential difference between an intermediate frequency furnace and an electric arc furnace

Intermediate frequency furnace is a power device that converts 50Hz AC power into IF (above 300HZ to 20K HZ). It converts three-phase power frequency AC power into DC power after rectification, and then converts DC power into adjustable intermediate frequency current. The intermediate frequency alternating current flowing in 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. This eddy current also has some properties of intermediate frequency currents, that is, the free electrons of the metal itself generate heat when they flow in the metal body with resistance. For example, if a metal cylinder is placed in an induction coil with alternating intermediate frequency current, the metal cylinder is not in direct contact with the induction coil. The temperature of the energized coil itself is already very low, but the surface of the cylinder is heated to redness or even melt And, this redness and melting speed can be achieved by adjusting the frequency and the strength of the current. If the cylinder is placed in the center of the coil, the temperature around the cylinder is the same, and the cylinder does not generate harmful gases and strong light to pollute the environment when it is heated and melted.

 Intermediate frequency furnace series melting furnace features:

1 (1) High melting efficiency, good power saving effect, compact structure and strong overload capacity

(2) The temperature around the furnace is low, there is less smoke and dust, and the working environment is good.

3 (3) Simple operation process and reliable melting operation.

(4) The metal composition is uniform.

(5) The melting temperature rises fast, the furnace temperature is easy to control, and the production efficiency is high.

(6) The furnace has a high utilization rate and convenient replacement of varieties.

(7) Long arc-shaped yoke shields magnetic leakage and reduces external magnetic resistance, magnetic leakage at both ends of the shielded coil, the yoke cross-section is inside of the arc and seamlessly fits on the outer wall, increasing the effective permeability area and making the lower ring Get better support. The unique forward and reverse coils greatly improve the efficiency of the system.

 Intermediate frequency furnace series diathermy furnace features:

Quick heating speed, high production efficiency, less oxidative decarbonization, saving material and forging die costs

● Excellent working environment, improve workers' working environment and company image, no pollution, low energy consumption

● Heating uniformly, core watch temperature difference is very small, temperature control accuracy is high

The medium frequency furnace heating device has the advantages of small size, light weight, high efficiency, excellent thermal processing quality and favorable environment. It is rapidly eliminating coal-fired furnaces, gas furnaces, oil furnaces and ordinary resistance furnaces. It is a new generation of metal heating equipment.

The intermediate frequency furnace is the main equipment of the casting forging and heat treatment workshop. Its stability, reliability and safety are the guarantee of the normal and stable operation of the casting forging and heat treatment production line.

Electric arc furnace

 An electric furnace that uses the high temperature of electrode arcs to melt ore and metals. When the gas discharge forms an arc, the energy is very concentrated, and the temperature in the arc region is above 3000 ° C. For smelting metals, the electric arc furnace is more flexible than other steelmaking furnaces, and can effectively remove impurities such as sulfur and phosphorus. The furnace temperature is easy to control and the equipment covers a small area. Electric arc furnaces can be classified into three-phase electric arc furnaces, consumable electric arc furnaces, single-phase electric arc furnaces and resistance electric arc furnaces according to the form of electric arc. The furnace body of an electric arc steelmaking furnace is composed of a furnace cover, a furnace door, a tapping trough and a furnace body. The furnace bottom and the furnace wall are built with alkaline refractory or acid refractory. The electric arc steelmaking furnace is divided into ordinary power arc furnace, high power arc furnace and ultra high power arc furnace according to the amount of transformer capacity allocated per ton of furnace capacity. Electric arc furnace steelmaking uses graphite electrodes to input electric energy into the electric arc steelmaking furnace, and uses the arc generated between the electrode end and the charge as a heat source to perform steelmaking. The electric arc furnace uses electric energy as a heat source, which can adjust the atmosphere in the furnace, which is extremely beneficial for smelting steel types that contain more easily oxidizable elements. Shortly after the invention of electric arc furnace steelmaking, it was used to smelt alloy steel, and it has been greatly developed.

With the improvement of electric arc furnace equipment and the improvement of smelting technology and the development of the electric power industry, the cost of electric arc furnace steelmaking continues to decline. Now electric arc furnace steelmaking is not only used to produce alloy steel, but also used to produce ordinary carbon steel in large quantities The proportion of output in the total steel output of major industrial countries is constantly rising.

The cost of electric arc furnace is very expensive, but the product quality is good, the industrial frequency furnace consumes the most electricity, 800-900 degrees / ton below 2,000KW for intermediate frequency furnace, and 600-700 degrees / ton for large furnace. These are only normal conditions. (Operation proficiency, equipment maintenance), equipment aging, various compensation, harmonic control, and other factors will affect power consumption.

Medium-frequency furnace steelmaking is relatively cheaper than electric arc furnaces and is suitable for small and medium-sized enterprises (small workshops), but the steel he produces has many impurities and high carbon content, so the steel produced is not pure, and those with low requirements can choose Medium-frequency furnace steel is generally larger than 3 tons in electric arc furnaces, so only electric arc furnaces of a certain size can be used to make steels that are relatively pure.

The electric arc furnace uses industrial frequency power, while the intermediate frequency electric furnace uses intermediate frequency power.