UHP graphite electrodes |
is used for the recycling of steel in the electric arc furnace industry. Its main ingredient is high-value needle coke which is made from either petroleum or coal tar. Graphite electrodes are finished with a cylinder shape and machined with threaded areas at each end. In this way, the graphite electrodes can be assembled into an electrode column using electrode nipple.
In order to meet the requirement of higher work efficiency and lower total cost, large capacity ultra-high power arc furnaces are becoming more and more popular. Because of this, UHP graphite electrodes with diameters of over 500 mm will dominate market.
Graphite electrodes are widely used for production of alloy steels, metal and other nonmetallic materials, etc.
Dia.(inch) | 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) |
---|---|---|---|---|---|---|---|---|
10 | 5.5 | 1.67 | 11 | 14 | 0.3 | 1.5 | 8100–12200 | 20–30 |
12 | 5.5 | 1.67 | 11 | 14 | 0.3 | 1.5 | 15000–22000 | 20–30 |
14 | 5.5 | 1.67 | 11 | 14 | 0.3 | 1.5 | 20000–30000 | 20–30 |
16 | 5.5 | 1.67 | 11 | 14 | 0.3 | 1.5 | 25000–40000 | 19–30 |
18 | 5.5 | 1.66 | 11 | 14 | 0.3 | 1.5 | 32000–45000 | 19–27 |
20 | 5.5 | 1.66 | 11 | 14 | 0.3 | 1.4 | 38000–55000 | 18–27 |
22 | 5.5 | 1.66 | 11 | 14 | 0.3 | 1.4 | 42000–66000 | 17–26 |
24 | 5.5 | 1.66 | 11 | 14 | 0.3 | 1.4 | 49000–76000 | 17–26 |
Diameter (mm) | Length (mm) | ||||||
---|---|---|---|---|---|---|---|
Nominal Diameter | Actual Diameter | Nominal Length | Tolerance | Short Length | |||
(inch) | (mm) | (max.) | (min.) | (rough spot) | |||
10 | 250 | 256 | 251 | 248 | 1600/1800 | ±100 | -275 |
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 |
SpecificationDefect Dimension | UHP graphite electrodes 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) |