Comparison of DC electric arc furnace and traditional AC electric arc furnace

Compared with traditional AC electric arc furnaces, there are those advantages. Do you know what electric arc furnaces are? In fact, electric arc furnaces are tools used to make steel. There are many types of electric arc furnaces. Different types of electric arc furnaces use different steelmaking methods.  The DC electric arc furnace is derived from the DC electric arc furnace, so what are the advantages of the DC electric arc furnace? Today I will introduce you to the advantages of the DC electric arc furnace.

A steel-making electric arc furnace that uses a DC power supply to supply electrical energy. Like the AC electric arc furnace, it uses the electric arc generated between the electrode and the charge (or molten pool) to generate heat to achieve the purpose of smelting. It can be used to smelt steel or alloys.

Compared with traditional AC electric arc furnace, the main advantages of DC electric arc furnace are:

(1) The arc is stable and concentrated, the molten pool is stirred well, the temperature in the furnace is evenly distributed, and the corrosion of the furnace lining is small;

(2) The current and voltage fluctuations are small, the impact on the grid is reduced, and the cable life is prolonged;

(3) The electrode loss is less, and the electrode consumption per ton of steel is 50% less than that of the AC electric arc furnace. The performance of the DC electric arc furnace is better than that of the AC electric arc furnace, but it has been suffering from the inability to obtain a high-power DC power supply, which has caused it to fail to develop for a long time.

With the application of thyristor technology, the manufacturing technology of high-power DC power supply equipment has been solved, so in the late 1970s, the metallurgical industry renewed the research on DC electric arc furnaces, and the construction and use of DC electric arc furnaces in the early 1980s The technical problems have been solved one by one.

There is only one electrode above the DC arc furnace, which is the negative electrode, and the bottom electrode is the positive electrode. Its power supply system is different from the AC electric arc furnace. It is equipped with a rectifier and a reactor. The contacts are installed on the bottom of the furnace to form a current loop. The maintenance and life of the contacts are key issues in the operation of the DC electric arc furnace. Generally, copper plates are placed on the furnace bottom steel plate. To facilitate electrical conductivity, three-layer magnesia-carbon bricks are built on the copper plate, and then refractory materials are knotted on it.

There are so many advantages of the DC electric arc furnace that the electric arc furnace manufacturer introduced to you today. I believe that everyone has a certain understanding of the DC electric arc furnace. When choosing an electric arc furnace in the future, you should choose according to the actual situation. DC electric arc furnace is a good equipment for steelmaking. In fact, there is still a lot of knowledge about electric arc furnaces. If you want to learn more, you can go online for more information.