Graphite electrode φ500
UHP graphite electrode is used for the recycling of steel in the electric arc furnace industry. Its main ingredient is high-value needle coke which is made from either petroleum or coal tar. Graphite electrodes are finished with a cylinder shape and machined with threaded areas at each end. In this way, the graphite electrodes can be assembled into an electrode column using electrode nipple.
In order to meet the requirement of higher work efficiency and lower total cost, large capacity ultra-high power arc furnaces are becoming more and more popular. Because of this, UHP graphite electrodes with diameters of over 500 mm will dominate market.
FEATURE
Withstand large currents, high discharge rate.
Good dimension stability, not easy to deform.
Resistant to cracking & spalling.
High resistance to oxidation and thermal shock.
High mechanical strength, low electrical resistance.
High machining accuracy, good surface finishing.
SPECIFICATION
Table 1: Technical Specification of UHP Graphite Electrode
|
Resistance |
Density |
FlexureStrength |
ElasticModulus |
AshContent |
CTE |
CurrentLoad |
CurrentDensity |
|
|
(inch) |
(≤,µΩ·m) |
(≥,g/cm3) |
(≥,MPa) |
(≤,GPa) |
(≤,%) |
(100°C–600°C) |
(A) |
(A/cm2) |
|
(≤,10-6/°C) |
||||||||
|
10 |
14 |
8100–12200 |
20–30 |
|||||
|
12 |
14 |
15000–22000 |
20–30 |
|||||
|
14 |
14 |
20000–30000 |
20–30 |
|||||
|
16 |
14 |
25000–40000 |
19–30 |
|||||
|
18 |
14 |
32000–45000 |
19–27 |
|||||
|
20 |
11 |
14 |
38000–55000 |
18–27 |
||||
|
22 |
11 |
14 |
42000–66000 |
17–26 |
||||
|
24 |
11 |
14 |
49000–76000 |
17–26 |
Table 2: Graphite Electrode Size & Tolerance
|
Diameter(mm) |
Length(mm) |
||||||
|
NominalDiameter |
ActualDiameter |
NominalLength |
Tolerance |
ShortLength |
|||
|
(inch) |
(mm) |
(max.) |
(min.) |
(roughspot) |
|||
|
10 |
250 |
256 |
251 |
248 |
1600/1800 |
±100 |
-275 |
|
12 |
300 |
307 |
302 |
299 |
1600/1800 |
||
|
14 |
350 |
357 |
352 |
349 |
1600/1800 |
||
|
16 |
400 |
409 |
403 |
400 |
1600/1800/2000/2200 |
||
|
18 |
450 |
460 |
454 |
451 |
1600/1800/2000/2200 |
||
|
20 |
500 |
511 |
505 |
502 |
1800/2000/2200/2400 |
||
|
22 |
550 |
562 |
556 |
553 |
1800/2000/2200/2400 |
||
|
24 |
600 |
613 |
607 |
604 |
2000/2200/2400/2700 |
||
SURFACE QUALITY
There should be less than two defects or holes on the electrode surface, the maximum size of which is mentioned in the below chart.There should be no transverse crack on the electrode surface. For the longitudinal crack, the length should be less than 5% of the electrode circumference and the width should be 0.3 to 1.0 mm.The width of black area on electrode surface should be less than 1/10 of the electrode circumference and the length should be less than 1/3 of the electrode.
|
SpecificationDefectDimension |
NominalDiameterofGraphiteElectrode(mm) |
|
|
300–400 |
450–600 |
|
|
Diameter(mm) |
20–40 |
30–50 |
|
(<20mmshouldbenegligible) |
(<30mmshouldbenegligible) |
|
|
Depth(mm) |
5–10 |
10–15 |
|
(<5mmshouldbenegligible) |
(<10mmshouldbenegligible) |
|
描述
超高压石墨电极用于电弧炉行业的钢铁回收。 其主要成分是由石油或煤焦油制成的高价值针状焦。 石墨电极制成圆柱形状，并在每端加工有螺纹区域。 这样，石墨电极可以使用电极接头组装成电极柱。
为了满足更高的工作效率和更低的总成本的要求，大容量超高功率电弧炉越来越受欢迎。 因此，直径超过 500 毫米的超高压石墨电极将主导市场。
特征
承受大电流，高放电率。
尺寸稳定性好，不易变形。
抗开裂和剥落。
高抗氧化性和抗热冲击性。
机械强度高，电阻低。
加工精度高，表面光洁度好。
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