Graphite Electrode
Graphite electrodes are widely used in iron and steel, non-ferrous metal smelting and silicon, phosphorus smelting, and other industries. According to the performance of products, they are divided into ultra-high-power graphite electrodes, high-power graphite electricity, and ordinary power graphite electrodes.
Physical and Chemical Index
Notes of the use of graphite electrode
1. The electrode holder should be held in the place beyond the security line of the top electrode; otherwise, the electrode would be easily broken. the contact surface between the holder and the electrode should be cleaned up regularly to maintain good contact, the cooling jacket of the holder shall be avoided from water leakage.
2. Identify the reasons there is a gap in the electrode junction, do not use them until the gap is eliminated.
3. If there is falling off of nipple bolt when connecting electrodes, it is necessary to complete the nipple bolt.
4. The application of the electrode should avoid tilting operation, the group of connected electrodes should not be put horizontally so as to prevent from breaking.
5. When charging materials to the furnace, the bulk materials should be charged to the place of the furnace bottom, so as to minimize the impact of the large furnace materials on the electrodes.
6. The large pieces of insulation materials should be avoided of stacking on the bottom of the electrodes when smelting .so as to prevent from affecting the electrode used or even broken.
7. Avoid collapsing the furnace lid when rising or dropping the electrodes, which may result in electrode damage.
It is necessary to prevent the steel slag from splashing to the threads of the electrodes or nipple stored in the smelting site, which may damage the precision of the threads.
Physical and Chemical Index
| Properties | Unit | Nominal Diameter of Electrode | ||||
| UHP | HP | RP | ||||
| 300-600 mm | 650-800mm | 300-800mm | 300-800mm | |||
| Electrode | μΩ.m | 4.8-5.8 | 4.6-5.8 | 5.8-6.6 | 7.8-8.8 | |
| Electric resistivity | Nipple | 3.8-4.5 | 3.8-4.5 | 4.2-5.0 | 5.0-6.5 | |
| Electrode | Mpa | 10.0-14.0 | 10.0-14.0 | 10.0-13.0 | 7.0-12.0 | |
| Flexural strength | Nipple | 20.0-26.0 | 22.0-26.0 | 18.0-22.0 | 15.0-20.0 | |
| Electrode | Gpa | 9.0-13.0 | 10.0-14.0 | 8.0-12.0 | 7.0-9.3 | |
| Young’s modulus | Nipple | 15.0-18.0 | 15.0-18.0 | 14.0-16.0 | 12.0-14.0 | |
| Electrode | ≥g/cm3 | 1.68-1.74 | 1.70-1.74 | 1.62-1.66 | 1.53-1.56 | |
| Bulk density | Nipple | 1.77-1.82 | 1.78-1.84 | 1.74-1.80 | 1.70-1.74 | |
| Electrode | ×10-6/℃ | 1.1-1.4 | 1.1-1.4 | 1.6-1.9 | 2.2-2.6 | |
| CTE(100-600℃) | Nipple | 0.9-1.2 | 0.9-1.2 | 1.1-1.4 | 2.0-2.5 | |
| Ash | 0.3 | 0.3 | 0.3 | 0.5 | ||
Notes of the use of graphite electrode
1. The electrode holder should be held in the place beyond the security line of the top electrode; otherwise, the electrode would be easily broken. the contact surface between the holder and the electrode should be cleaned up regularly to maintain good contact, the cooling jacket of the holder shall be avoided from water leakage.
2. Identify the reasons there is a gap in the electrode junction, do not use them until the gap is eliminated.
3. If there is falling off of nipple bolt when connecting electrodes, it is necessary to complete the nipple bolt.
4. The application of the electrode should avoid tilting operation, the group of connected electrodes should not be put horizontally so as to prevent from breaking.
5. When charging materials to the furnace, the bulk materials should be charged to the place of the furnace bottom, so as to minimize the impact of the large furnace materials on the electrodes.
6. The large pieces of insulation materials should be avoided of stacking on the bottom of the electrodes when smelting .so as to prevent from affecting the electrode used or even broken.
7. Avoid collapsing the furnace lid when rising or dropping the electrodes, which may result in electrode damage.
It is necessary to prevent the steel slag from splashing to the threads of the electrodes or nipple stored in the smelting site, which may damage the precision of the threads.
