6 Working Principles of Electric Arc Furnaces

6 tons of electric arc furnaces can smelt high-quality non-alloy steel and alloy steel. During the smelting process of steelmaking electric furnace, oxidizing or reducing atmosphere and conditions can be formed according to the process requirements, so it is suitable for the production of different types of steel.
Specifically, carbon steel or stainless steel can be produced by adding oxidants or blowing oxygen into the molten steel to carry out oxidation reactions, remove part of carbon, phosphorus and other impurities, and then through the reduction refining process.
In addition, electric arc furnace can also use scrap steel, pig iron or direct reduced iron as raw materials to achieve the recycling of steel products. Let's learn about its working principle together.

 

Arc furnaces use alternating current (AC) or direct current (DC) to generate arcs. In these furnaces, an arc is generated when an electrode (usually made of carbon or graphite) is energized. The arc is generated between the electrode and the melted material, which is usually placed in a crucible or directly in the furnace.

The temperature generated by the arc can exceed 3000°C, which is enough to melt most metals. The heat is intense and localized, directly heating the material to be melted. This direct heating method can effectively use energy and quickly melt the charge.

Modern steelmaking arc furnaces are equipped with vertically placed graphite electrodes. The arc is shot directly into the metal molten pool, and the arc length can be automatically adjusted to maintain optimal heating conditions. The furnace wall lining can withstand high temperatures, and the electrodes are constantly replaced after they are consumed during operation.

AC EAF: This is the most common type, using a three-electrode three-phase system. Each electrode participates in the heating process, and an arc is generated between each electrode and the metal being processed.

DC EAF: Uses a single electrode, which is less common, but is becoming more and more popular due to its higher efficiency and lower electrode consumption.

Integrated metal electric arc furnace are highly flexible and can be operated continuously or intermittently. They can be combined with traditional steelmaking processes to improve overall efficiency and production capacity. However, they also have limitations, such as the need to continuously replace electrodes and maintain high-temperature furnace linings.

Power is supplied to the electric furnace through a transformer and copper busbars. The 6 ton electric arc furnaces itself can be a simple water-cooled stainless steel structure, small in size, easy to clean quickly, and maintain the high purity of the processed materials.

 

In short, the working principle of the steelmaking electric arc furnace is to use an electric arc to generate high heat, which is then used to melt the metal. This technology is widely used and efficient, and is an indispensable part of modern metallurgical processes, especially in steel production.