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Furnace Graphite Electrode Regular Power RP Grade 550mm Large Diameter

Short Description:

The RP graphite electrode has revolutionized the steel-making industry and has helped numerous facilities attain higher productivity levels, reduced costs, and improved the quality of their end products.


Product Detail

Product Tags

Technical Parameter

Parameter

Part

Unit

RP 550mm(22”) Data

Nominal Diameter

Electrode

mm(inch)

550

Max Diameter

mm

562

Min Diameter

mm

556

Nominal Length

mm

1800/2400

Max Length

mm

1900/2500

Min Length

mm

1700/2300

Max Current Density

KA/cm2

12-15

Current Carrying Capacity

A

28000-36000

Specific Resistance

Electrode

μΩm

7.5-8.5

Nipple

5.8-6.5

Flexural Strength

Electrode

Mpa

≥8.5

Nipple

≥16.0

Young’s Modulus

Electrode

Gpa

≤9.3

Nipple

≤13.0

Bulk Density

Electrode

g/cm3

1.55-1.64

Nipple

C.T.E.

Electrode

×10-6/℃

≤2.4

Nipple

≤2.0

Ash Content

Electrode

%

≤0.3

Nipple

≤0.3

NOTE:Any specific requirement on dimension can be offered.

Graphite Electrode Factors In Steelmaking

In the steelmaking industry, the Electric Arc Furnace (EAF) process is one of the most widely used methods. Choosing the right graphite electrode is essential for this process. RP (Regular Power) graphite electrodes are a popular choice due to their affordability and suitability for medium-power furnace operations.

When selecting RP graphite electrodes, there are several important factors to consider. One is the electrode's diameter, which should be appropriate for the specific furnace size and production requirements. The grade of the electrode is another factor; RP graphite electrodes are typically classified into four grades according to their electrical resistivity and flexural strength. The appropriate grade should be selected based on the specific requirements of the furnace operation.

Recommended Data For Matching Graphite Electrode With Electric Arc Furnace

Furnace Capacity (t)

Inner Diameter (m)

Transformer Capacity  (MVA)

Graphite Electrode Diameter (mm)

UHP

HP

RP

10

3.35

10

7.5

5

300/350

15

3.65

12

10

6

350

20

3.95

15

12

7.5

350/400

25

4.3

18

15

10

400

30

4.6

22

18

12

400/450

40

4.9

27

22

15

450

50

5.2

30

25

18

450

60

5.5

35

27

20

500

70

6.8

40

30

22

500

80

6.1

45

35

25

500

100

6.4

50

40

27

500

120

6.7

60

45

30

600

150

7

70

50

35

600

170

7.3

80

60

---

600/700

200

7.6

100

70

---

700

250

8.2

120

---

---

700

300

8.8

150

---

---

Surface Quality Ruler

1.The defects or holes should not more than two parts on the graphite electrode surface, and the defects or holes size not be allowed exceed the data in table below mentioned.

2.There is no transverse crack on the electrode surface.For longitudinal crack,its length should be not more than 5% of the graphite electrode circumference,its width should be within 0.3-1.0mm range.Longitudinal crack data below 0.3mm data should be negligible

3.The width of he rough spot(black) area on the graphite electrode surface should be not less than 1/10 of the graphite electrode circumference,and the length of rough spot(black) area over 1/3 of the graphite electrode length is not be allowed.

Surface Defect Data for Graphite Electrode Chart

Nominal Diameter

Defect Data(mm)

mm

inch

Diameter(mm)

Depth(mm)

300-400

12-16

20–40
< 20 mm should be negligible

5–10
< 5 mm should be negligible

450-700

18-24

30–50
< 30 mm should be negligible

10–15
< 10 mm should be negligible


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