Characteristics of double electrode DC electric arc furnace/ submerged arc furnace

Equipment characteristics:

1.The power consumption is 10%~15% less than that of AC furnace.

2.The consumption of graphite electrode is 40% less than that of AC furnace.

3.Compared with AC furnace, it eliminates the investment of reactive power compensation device.

4.PLC automatic control, production rhythm is stable and reliable.

5.In the smelting process, according to the process requirements, without shutdown, the current remains unchanged, the voltage level increases or decreases at will, and then the arc length changes at will, so as to realize the open arc and submerged arc functions. It can also adjust the voltage and power arbitrarily.

6.The electrode can change its polarity at will in the smelting process, which greatly shortens the smelting time.

7.Because of the serious thermal effect of bottom anode, the bottom of single electrode DC furnace is easy to burn out. The double electrode DC furnace has no bottom anode effect, which completely solves the problem .

8. DC power supply main control board has the function of photoelectric isolation, which can effectively avoid the strong magnetic field in the production site to interfere with the stability of the control circuit in the production process. The board also has the functions of overvoltage, overcurrent and high temperature protection, which can effectively avoid the damage caused by short circuit to the equipment.

9.DC plasma melting equipment electrode center temperature is high, heat concentration, easy to deep buried electrode, furnace bottom is not easy to rise, more suitable for high melting point products smelting.

10.In the smelting process, metal ions in the melt will be concentrated around the negative electrode due to electrolysis, so as to improve the yield and purity of products, which is more conducive to the enrichment of precious metals and other high-value metals.

11.The current direction and electromagnetic field direction of DC furnace remain unchanged. Driven by the magnetic field, the molten slurry circulates in one direction all the time, forming electromagnetic stirring, so that the material melts without dead corners, the product quality is high, and the yield is high.

However, the current direction of the AC furnace changes 50 times per second, and the direction of the magnetic field is chaotic, which makes it impossible to realize the electromagnetic stirring function.

12.The noise level is 10~20 dB lower than AC furnace.

13.The graphite electrode consumption of DC furnace is 40% lower than that of AC furnace.

14.The refractory of furnace wall has a long service life. The angle between arc light and graphite electrode of AC furnace is 45 ° and it is easy to hit the furnace wall, thus damaging the refractory of furnace wall. The angle between arc light and graphite electrode of DC furnace is 30 ° and it is not easy to hit the furnace wall .

15.When an accident occurs in the smelting process and a power failure occurs for a period of time, an insulating hard shell will be formed on the surface of the molten liquid. If the single electrode DC furnace encounters this situation, The equipment cannot continue smelting, so it can only be dismantled. Facing this situation, the double electrode DC furnace can start arc smelting again by adding arc striking materials such as coke at the bottom of the electrode.