A DC electric arc furnace (DC EAF) is a type of electric arc furnace that uses direct current (DC) to produce heat for melting metals. It is widely used in the steelmaking industry for melting scrap and producing steel.

In a DC EAF, an electric arc is created between two electrodes (usually graphite electrodes) and the scrap metal that is placed in the furnace. The electric arc generates intense heat that melts the metal, and the molten metal is then tapped from the furnace and used to produce steel.

One of the advantages of using a DC EAF is that it allows for greater flexibility in the types of scrap metal that can be melted. Because DC EAFs can operate at higher temperatures than AC EAFs (which use alternating current), they can melt a wider range of metals and alloys.

Another advantage of DC EAFs is their energy efficiency. By using DC power, the furnace can be operated at a lower voltage, which reduces energy losses and leads to higher efficiency.

However, DC EAFs also have some disadvantages, including higher capital costs and the need for specialized equipment to supply and control the DC power. Additionally, the use of DC power can lead to more wear and tear on the furnace electrodes, which can increase maintenance costs.

We can produce one electrode and three electrodes DC electric arc furnace, this will base on the equipment’s producing capacity. Whether melting metal or nonmetal, DC arc furnace can save more than 20% energy than AC furnace, because melting material will be turned up from bottom following electric current just like mixing, so the melting speed will be higher. Such as melting one ton scrap steel powder, the consumption of DC ARC furnace will be 610 KWh, but induction furnace will be 1100 KWh.