550-800mm RP graphite electrode,RP Graphite Electrode

550-800mm RP graphite electrode,RP Graphite Electrode,Industrial Graphite Electrode,High Density Graphite Electrodes Manufacturer

RP Graphite Electrode

Industrial Graphite Electrode

High Density Graphite Electrodes Manufacturer

Electric resistivity :  7.5-8.8

Bending strength:>=6.5

Elastic Modulus: <=9

Bulk density: 1.54-1.62

Ash: <=0.3

CTE: 2.20-2.60

Regular power graphite electrode is a graphite electrode with allowable current density lower than 17A/cm2. RP graphite electrode is mainly used in the ordinary power electric furnace for steelmaking, silicon smelting and yellow phosphorus refining etc.

Physical and Chemical Index of  Hign Power Graphite Electrode:

Item 

Unit

HP

300~500

550~700

Electric Resistivity 

Electrode

uΩ.m

   

Nipple

 

Bending Strength

Electrode

MPa

≥10.0

≥8.5

Nipple

≥18.0

Modulus of Elasticity

Electrode

GPa

≤13.0

Nipple

≤15.0

Bulk Density

Electrode

g/cm3

 

Nipple

 

Ash Content

Electrode

%

≤0.3

Nipple

The Coefficient of Thermal Expansion(CTE)

Electrode

10-6/℃

 

Nipple

 

 

High Power Graphite Electrode Current Carrying Capacity

Norminal Diameter

HP

Current Carrying Capacity

Current Density

inch

mm

A

A/cm2

12

300

13000~17400

17~24

14

350

17400~24000

17~24

16

400

21000~31000

16~24

18

450

25000~40000

15~24

20

500

30000~48000

15~24

22

550

34000~53000

14~22

24

600

38000~58000

13~21

28

700

45000~72000

12~19

32

800

 

Tolerance of Graphite Electrode Diameter and Length(mm) 

Nominal Diameter

Actural diameter

Length

in

mm

max

min

Black surface min

12

300

307

302

299

1800/2000

14

350

358

352

349

1800/2000/2200

16

400

409

403

400

1800/2000/2200

18

450

460

454

451

1800/2000/2200

20

500

511

505

502

2000/2200/2400

22

550

562

556

553

2000/2200/2400/2700

24

600

613

607

604

2200/2400/2700/3000

28

700

714

710

707

2200/2400/2700/3000

29

800

816

812

809

2200/2400/2700/3000

 

Permissible Deviation of Graphite Electrode Length (mm)

Nominal Length

Standard Deviation

Short Length Deviation

max

min

max

min

1800

+100

-100

-100

-275

2000

+100

-100

-100

-275

2200

+100

-100

-100

-275

2400

+100

-100

-100

-275

2700

+200

-150

-150

-275

3000

+200

-150

-150

-300

 




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