.

needle coke graphite electrode

PRODUCT CHARACTERISTIC: Mainly used in steelmaking electric arc furnace, refining furnace, industrial silicon furnace, yellow phosphorus furnace, corundum furnace, etc., as conductive usage.

series products are made of high quality carbon materials.The main products are: , smelting furnace shaped carbon block,, , graphite crucible, electrode paste, , and non-standard specifications of shaped carbon products.

PRODUCT DESCRIPTION

NAME: Graphite Electrode

MODEL:350mm

Introduction

The is mainly made of petroleum coke and needle coke, and the coal asphalt is used as a binder. It is made by calcination, distributing, kneading, forming, roasting, graphitization and machining. It's a conductor which release electric energy in the form of electric arc in the electric arc furnace heats and melts the material. the charge can be divided into a regular power graphite electrode, a high power graphite electrode and an ultra high power graphite electrode according to its quality index. The main raw material for graphite electrode production is petroleum coke. The regular power graphite electrode can be added with a small amount of pitch coke. The sulfur content of petroleum coke and pitch coke cannot exceed 0.5%. Needle coke is also required for the production of high power or ultra high power graphite electrodes.

Advantage:

The advantage of graphite electrode is that it is easy to process, the electricity discharge processing rate is high, and the graphite loss is small.

Production characteristics

The production period is long. The production period of regular power graphite electrodes is about 45 days, the production period of ultra high power graphite electrodes is more than 70 days, and the production period of graphite electrode joints (nipples) requiring multiple impregnation is more longer.

Application:

Mainly used in electric arc steelmaking furnaces, refining furnaces, industrial silicon furnaces, yellow phosphorus furnaces, electric resistance furnaces, etc., as conductive usage. The graphite electrode blank is also used to process a variety of shaped graphite products such as enamel, mold, boat and heating element.

Technical Properties of Graphite Electrodes & Nipples

Item

Unit

RP Graphite Electrodes

Specific Resistance ≤

Electrodes (E)

μΩ.m

Nipple (N)

Flexural Strength ≥

Electrodes (E)

MPa

Nipple (N)

Elastic Modulus ≤

Electrodes (E)

GPa

Nipple (N)

Bulk Density ≥

Electrodes (E)

ɡ/㎝³

Nipple (N)

100-600(C.T.E.) ≤

Electrodes (E)

10-6/℃

Nipple (N)

Ash Content ≤

Electrodes (E)

%

Nipple (N)

Real Density ≥

Electrodes (E)

ɡ/㎝³

Nipple (N)

Allowable Current of Graphite Electrodes

NorminalDiameter

RP Graphite Electrode

Allowable Current

mm

in

A

A/cm2

75

3

1000-1400

22-31

100

4

1500-2400

19-30

130

2200-3400

17-26

150

6

3000-4500

16-25

175

7

4000-5500

16-22

200

8

500-6900

16-21

225

9

6000-8200

15-20

250

10

7000-10000

14-20

300

12

14-18

350

14

14-18

400

16

14-18

Size & Dviation of Graphite Electrode

(Unit):mm

NorminalDiameter

Actual Diameters

Length

mm

in

Black PartMin.

Standard

Allow Deviation

Allow RulerDeviation

75

3

78

73

72

1000

+/-50

-50-225

100

4

103

98

97

1200

+/-50

-50-225

130

132

127

126

1200

+/-50

-50-225

150

6

154

149

146

1600

+/-100

-100-275

175

7

179

174

171

1600

+/-100

-100-275

200

8

205

200

197

1600

+/-100

-100-275

225

9

230

225

222

1600

+/-100

-100-275

250

10

256

251

248

1600/1800

+50/-100

-100-275

300

12

307

302

299

1600/1800

+/-100

-100-275

350

14

357

352

349

1600/1800

+/-100

-100-275

400

16

409

403

400

1600/1800

+/-100

-100-275



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