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Brand:graptek
Description:HP (high power) graphite electrodes are widely used in electric arc furnaces for steel melting. They are used to carry the electricity that melts scrap steel.
Origin:China
FOB:perMetric Ton/Metric Tons0.8--1USD
Port:Tianjin
Payment Terms:L/C
Supply Ablility:60000Metric Ton/Metric Tons
Supply Time:Year
Packaging Details:Packing with wooden case and pallet,and enlace with baling band
Product detail: DE
HP graphite electrode is the conducting element for electric arc furnaces steelmaking. It is made of petroleum coke, needle coke, coal pitch and produced by a series of strict production processes. High-current lines insert through the graphite electrode port inside the furnace body. This will releases electric energy in the arc furnace to heat the furnace.
The demand for the larger diameter electrodes has been increasing as EAF furnace sizes become larger. Graphite electrodes with diameter of 500 mm or 600 mm have become increasingly popular in recent years.
- Anti-oxidation treatment for longevity.
- High-purity, high-density, strong chemical stability.
- High machining accuracy, good surface finishing.
- High mechanical strength, low electrical resistance.
- Resistant to cracking & spalling.
- High resistance to oxidation and thermal shock.
Graphite electrodes are widely used for production of alloy steels,
- DC electric arc furnace.
- AC electric arc furnace.
- Submerged arc furnace.
Graphite electrode for submerged arc furnace
Graphite electrode for AC arc furnace
Graphite electrode for DC arc furnace
| Diameter | Resistance (≤, µΩ·m) |
Density (≥, g/cm3) |
Flexure Strength (≥, MPa) |
Elastic Modulus (≤, GPa) |
Ash Content (≤, %) |
CTE (100 °C – 600 °C) (≤, 10-6/°C) |
Current Load (A) |
Current Density (A/cm2) |
|
|---|---|---|---|---|---|---|---|---|---|
| inch | mm | ||||||||
| 8 | 200 | 6.5 | 1.62 | 10.5 | 12 | 0.3 | 2.4 | 5500–9000 | 18–25 |
| 9 | 225 | 6.5 | 1.62 | 10.5 | 12 | 0.3 | 2.4 | 6500–10000 | 18–25 |
| 10 | 250 | 6.5 | 1.62 | 10.5 | 12 | 0.3 | 2.4 | 8000–13000 | 18–25 |
| 12 | 300 | 6.5 | 1.62 | 10.5 | 12 | 0.3 | 2.4 | 13000–17400 | 17–24 |
| 14 | 350 | 6.5 | 1.62 | 10.5 | 12 | 0.3 | 2.4 | 17400–24000 | 17–24 |
| 16 | 400 | 6.5 | 1.62 | 10.5 | 12 | 0.3 | 2.4 | 21000–31000 | 16–24 |
| 18 | 450 | 6.5 | 1.60 | 9.8 | 12 | 0.3 | 2.4 | 25000–40000 | 15–24 |
| 20 | 500 | 6.5 | 1.60 | 9.8 | 12 | 0.3 | 2.4 | 30000–48000 | 15–24 |
| 22 | 550 | 6.5 | 1.60 | 9.8 | 12 | 0.3 | 2.4 | 37000–57000 | 15–23 |
| 24 | 600 | 6.5 | 1.60 | 9.8 | 12 | 0.3 | 2.4 | 44000–67000 | 15–23 |
| Diameter (mm) | Length (mm) | ||||||
|---|---|---|---|---|---|---|---|
| Nominal Diameter | Actual Diameter | Nominal Length | Tolerance | Short Length | |||
| (inch) | (mm) | (max.) | (min.) | (rough spot) | |||
| 8 | 200 | 205 | 200 | 197 | 1600 | ±100 | -275 |
| 9 | 225 | 230 | 225 | 222 | 1600 | ||
| 10 | 250 | 256 | 251 | 248 | 1600/1800 | ||
| 12 | 300 | 307 | 302 | 299 | 1600/1800 | ||
| 14 | 350 | 357 | 352 | 349 | 1600/1800 | ||
| 16 | 400 | 409 | 403 | 400 | 1600/1800/2000/2200 | ||
| 18 | 450 | 460 | 454 | 451 | 1600/1800/2000/2200 | ||
| 20 | 500 | 511 | 505 | 502 | 1800/2000/2200/2400 | ||
| 22 | 550 | 562 | 556 | 553 | 1800/2000/2200/2400 | ||
| 24 | 600 | 613 | 607 | 604 | 2000/2200/2400 | ||
- There should be less than two defects or holes on the electrode surface, the maximum size of which is mentioned in the below chart.
- There should be no transverse crack on the electrode surface. For the longitudinal crack, the length should be less than 5% of the electrode circumference and the width should be 0.3 to 1.0 mm.
- The width of black area on electrode surface should be less than 1/10 of the electrode circumference and the length should be less than 1/3 of the electrode.
| SpecificationDefect Dimension | Nominal Diameter of Graphite Electrode (mm) | |
|---|---|---|
| 300–400 | 450–600 | |
| Diameter (mm) | 20–40 (< 20 mm should be negligible) |
30–50 (< 30 mm should be negligible) |
| Depth (mm) | 5–10 (< 5 mm should be negligible) |
10–15 (< 10 mm should be negligible) |
