Furnace Graphite Electrode Regular Power RP Grade 550mm Large Diameter
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 |
5–10 |
|
450-700 |
18-24 |
30–50 |
10–15 |
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