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Home / Graphite Electrode / UHP GRAPHITE ELECTRODEGraphite Electrode UHP GRAPHITE ELECTRODE
UHP graphite electrode is mainly used for ultra high power electric arc furnaces with the current density greater than 25 A/cm2. UHP graphite electrode 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.
Features
Withstand large currents, high discharge rate.
Good dimension stability, not easy to deform.
Resistant to cracking & spalling.
High resistance to oxidation and thermal shock.
High mechanical strength, low electrical resistance.
High machining accuracy, good surface finishing.
Application
Graphite electrodes are widely used for production of alloy steels, metal and other nonmetallic materials, etc.
DC electric arc furnace.
AC electric arc furnace.
Submerged arc furnace.
Ladle furnace.
Technical Specification of UHP Graphite Electrode
Dia.
Resistance
Density
Flexure Strength
Elastic Modulus
Ash Content
CTE
Current Load
Current Density
(inch)
(≤, µΩ·m)
(≥, g/cm3)
(≥, MPa)
(≤, GPa)
(≤, %)
(100 °C – 600 °C)
(A)
(A/cm2)
(≤, 10-6/°C)
10
5.2
1.67
10.5
14
0.3
1.5
8100–12200
20–30
12
5.2
1.7
10.5
14
0.3
1.5
15000–22000
20–30
14
5.2
1.7
10.5
14
0.3
1.5
20000–30000
20–30
16
5.2
1.7
10.5
14
0.3
1.5
25000–40000
19–30
18
5.2
1.7
10.5
14
0.3
1.5
32000–45000
19–27
20
5.2
1.7
11
14
0.3
1.4
38000–55000
18–27
22
5.2
1.72
11
14
0.3
1.4
42000–66000
17–26
24
4.8
1.72
11
14
0.3
1.4
49000–76000
17–26
Graphite Electrode Size & Tolerance
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
2000/2200/2400/2700
Surface Quality There should be less than two defects or holes on the electrode surface, the maximum size of which is mentioned in the below chart.
SpecificationDefect Dimension
Nominal Diameter of Graphite Electrode (mm)
300–400
450–600
Diameter (mm)
20–40
30–50
(
(
Depth (mm)
5–10
10–15
(
(
400mm HP Graphite Electrode