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High Power Graphite Electrode (HP)

High power graphite electrode uses imported needle coke ,petroleum coke as main material and asphalt as binder.If the diameter is ≤400mm, the resistance is ≤6.3. If the diameter is ≥450mm, the resistance is ≤6.5.And the current load is between15A/Cm3 -25A/Cm3.

Detailed Introduction

The technical indexes of charcoal graphite electrode:

Item Unit High Power HP
≤φ400 ≥φ450
High Power HP Electrode μΩ·m 5.2-6.3 5.3-6.5
Nipple 3.5-4.5
Flexural Strength Electrode Mpa 10.5-15 10.5-15
Nipple 20-26
Modulus of Elasticity Electrode Gpa 9-12
Nipple 13-18
Ash Content Electrode % 0.2
Nipple
Bulk Density electrode G/cm3 1.65-1.72
Nipple 1.75-1.81
Coefficient of Thermal Expansion Electrode 10-6/℃ 1.6-1.8
Nipple 1.3-1.5


Graphite electrode suggested current load meter:

Nominal Diameter
Permissible Current Load
High Power Graphite Electrode HP
mm A A/Cm3
200 5500-9000 18-25
250 8000-13000 18-25
300 13000-17400 17-24
350 17400-24000 17-24
400 21000-31000 16-24
450 25000-40000 15-24
500 30000-48000 15-24
550 37000-58000 15-23
600 42000-65000 15-23
700 59620-83600 15-21


Graphite electrode specifications and allowable deviations:

Nominal diameter Actual diameter Actual diameter
mm in Maximum Minimum The smallest part of the black skin length Length allowable deviation Short length
200 8 205 200 197



±100




-275
250 10 256 251 248 1600
300 12 307 302 299 1800
350 14 357 352 349
400 16 409 403 400
450 18 460 454 451 1800
500 20 511 505 502 2100
550 22 562 556 553 2400
600 24 613 607 604 2700
700 28 714 708 705

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