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Graphite Electrode

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    Chemical Index

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Artificial graphite electrode is made of high-quality low ash materials, such as petroleum coke, needle coke 

and coal pitch.after calcining,burdening,kneading,forming,baking and pressure impregnation, graphitization

and then precision machined with professional CNC machining.such of the products own characteristics with

low resistivity, good electrical conductivity ,low ash, compact structure,good anti oxidation and high

mechanical strength, so it is the best conductive material for electric arc furnace and smelting furnace. 


Notes of the use of graphite electrode 

1.The electrode holder should be held in the place beyond the security line of the top electrode;otherwise, the electrode would be easily broken.the contact surface between the holder and the electrode should be cleaned up regularly to maintain a good contacting,the cooling jacket of the holder shall be avoided from water leakage. 

2.Identify the reasons it there is gap in the electrode junction,do not use them until the gap is eliminated. 

3.If there is falling off of nipple bolt when connecting electrodes,it is necessary to complete the nipple bolt. 

4.The application of electrode should avoid of tilting operation, particularly , the group of connected electrodes should not be put horizontally so as to prevent from breaking. 

5.When charging materials to the furnace,the bulk materials should be charged to the place of the furnace bottom,so as to minimize the impact of the large furnace materials on the electrodes. 

6.The large pieces of insulation materials should be avoided of stacking on the bottom of the electrodes when smelting so as to prevent from affecting the electrode use or even broken. 

7.Avoid of collapsing the furnace lid when rising or dropping the electrodes,which may result in electrode damage. 

8.It is necessary to prevent the steel slag from splashing to the threads of the electrodes or nipple stored in the smelting site,which may damage the precision of the threads. 

Production Equipment

 

 

性能

Properties

 

单位

Unit

石墨电极公称直径Nominal Diameter Of Electrode

UHP

HP

RP

300-600 mm

650-800mm

300-800mm

300-800mm

电阻率

Electric resistivity

电极Electrode

μΩ.m

4.8-5.8

4.6-5.8

5.8-6.6

7.8-8.8

接头Nipple

3.8-4.5

3.8-4.5

4.2-5.0

5.0-6.5

抗折强度

Flexural strength

电极Electrode

Mpa

10.0-14.0

10.0-14.0

10.0-13.0

7.0-12.0

接头Nipple

20.0-26.0

22.0-26.0

18.0-22.0

15.0-20.0

弹性模量

Young’s modulus

电极Electrode

Gpa

9.0-13.0

10.0-14.0

8.0-12.0

7.0-9.3

接头Nipple

15.0-18.0

15.0-18.0

14.0-16.0

12.0-14.0

体积密度

Bulk density

电极Electrode

g/cm3

1.68-1.74

1.70-1.74

1.62-1.66

1.53-1.56

接头Nipple

1.77-1.82

1.78-1.84

1.74-1.80

1.70-1.74

热膨胀系数

CTE(100-600℃)

电极Electrode

×10-6/℃

1.1-1.4

1.1-1.4

1.6-1.9

2.2-2.6

接头Nipple

0.9-1.2

0.9-1.2

1.1-1.4

2.0-2.5

灰分Ash


0.3

0.3

0.3

0.5

Sizes and permissible variation of graphite electrode

公称直径Nominal Diameter

实际直径Actual Diameter(mm)

实际长度Actual Length(mm)

mm

in

最大  Max

最小      Min

黑皮部分最小Black cover part

长度Length

长度允许偏差Tolerance

短尺长度Short ruler sizes

200

8

205

200

197

1600 1800

±100

-275

250

10

256

251

248

300

12

307

302

299

350

14

357

352

349

400

16

409

403

400

1600 1800 2000 2200

450

18

460

454

451

500

20

511

505

502

550

22

562

556

553

600

24

613

607

604


Packing 

Graphite electrode is packaged by wooden cages and nipple is packaged by wooden boxes.graphite electrode and nipple can be packaged together according to the requirements of the customers.the products are protected by waterproof and dustproof plastic inside and fixed by steel bands,fit for road and sea transportation.

 


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