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SOLUTION

Storages of the electrode

Storages of the electrode

Handling and storages of the electrode
1. Operate carefully when lift and move the electrodes so as to avoid drop and damage caused by the inclining of the electrode.
2. To keep the end face of the electrode and the thread in the socket in a good status, never hook into the sockets on both side of the electrode with metal hooks when moving the electrodes.
3. Carefully lift up and down when load and unload the case with nipples so as to prevent the nipples from clicking against each other and cause damages to the thread of the nipples thereof.
4. Don’t put the electrodes and nipples directly onto the grand, put them onto wooden bars or metal stands instead, collision or sand contamination must be avoided. Don’t take the packing materials away when the electrode and nipples are not going be used. Dust and contaminations to the threads must be avoided.
5. Electrode storage in the warehouse should be put neatly on both sides. Do not stack electrodes too high; the height of stacks is generally not more than 2 meters.
6. Electrodes in the stacks must be protected away from rains and heavy humidity, wet electrode must be dried before being loaded onto the furnace so as to reduce the risks of cracking and over high oxidization when operation.
7. Nipples must be away from high temperature to prevent the pitch plugs from melting.
Precautions to the usage of electrode:
1.Determine the grade and diameter of the electrode suitable to be applied by the capacity of the furnace, and the capacity of the furnace transformer. (please refer to below table).

nominal diameter(mm)

Operating current range

RP

HP

UHP

75

1000-1400

1000-2000

 

100

1500-2400

2000-3000

 

150

3500-4900

4000-5400

 

200

5000-6900

5400-10000

 

250

7000-10000

10000-13000

 

300

10000-13000

13000-17400

18000-24000

350

13500-18000

17400-24000

22000-30000

400

18000-23500

24000-32000

28000-35000

450

22000-27000

32000-40000

33000-45000

500

25000-32000

40000-48000

40000-55000

2. In order to prevent the electrode column from being hit by the collapsed furnace loads, heavy and big scraps should be loaded onto the bottom of the furnace, don’t put significant quantity of insulating materials such as lime and so on just under the electrode column, otherwise it would be difficult to power on the electrode column, or even break the column for this.
3. When the electrode column moves upward and downward, it should be moved smoothly. After mend the furnace cover, please check the position of it.
When melting, in order to prevent it oxidation, fireproofing material should be used.
4. To avoid breakage, don’t put an electrode column horizontally.
5. The reason must be find out if a gap appeared between two electrodes after connection, the electrode column can only be loaded after the gap eliminated.
6. The electrode column must be straightly perpendicular to the ground level during operation, oblique column is not allowed during operation.
7. Please refer to figure 10 for right position of electrode and nipple.
8. The position of the electrode holder of the furnace must be between the two holder marks on the top electrode. The electrode holder should neither hole the electrode out of the two holder marks on the electrode, nor hold on the electrode other then the top one, otherwise, the column may be broken for this.
9. Lock pins can be applied to the electrode columns for the furnace with severe vibration, it helps stopping the unscrewing during operation.