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Superior Quality Graphite Electrode UHP/HP/RP for Electric Arc Furnace

  • Superior Quality Graphite Electrode UHP/HP/RP for Electric Arc Furnace
  • Superior Quality Graphite Electrode UHP/HP/RP for Electric Arc Furnace
Place of Origin China
Brand Name Chaoyo
Certification QA/QC
Model Number graphite electrode
Minimum Order Quantity 25tons
Packaging Details wooden pallet
Delivery Time 10-15days
Payment Terms TT/LC
Supply Ability 3000 Metric Ton/Metric Tons per Month
Product Details
Application EAF / LF Diameter 550mm
Length 1800mm Length Resistance (μΩ.m) ≤6.5
Apparent Density (g/cm³ ) ≥1.65 Thermal Expansion ≤2.4
Flexural Strength (N/㎡) ≥10.5 Type Electrode Block
Grade UHP (Ultra High Power) Connect 4TPI
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Product Description

Superior Quality Graphite Electrode UHP/HP/RP for Electric Arc Furnace

 

Description:

The main function of graphite electrode is to conduct electricity when smelting metal in electric arc furnace (EAF). Due to the increasing proportion of steel smelted by EAF in the world, the use of EAF to smelt steel plate and other secondary formed steel is the main project to consume graphite electrode. In addition, graphite electrodes are also used in smelting furnaces to melt non-ferrous metals, ceramic products and waste recycling industries.

What grade of graphite electrode can our company provide?

A particular application may require different grades of electrodes to match existing furnaces and reduce overall melting costs. Generally, according to the quality level, graphite electrode can be divided into the following three standards:

 
 
1. Low electric resistance
2. High density
3. Good electrical conductivity
4. High anti-oxidation capability
5. Precise machining accuracy
6. Low sulphur and low ash, not give steel second time impurity

 

Specification

 Physical & Chemical Index

ITEMS REGULAR POWER HIGH POWER ULTRA HIGH POWER
Ø75-200 Ø250-600 Ø200-400 Ø450-600 Ø200-500 Ø550-700

 

Resistance μΩ.m (Max)

 Electrode 8.5 6.5 5.5
Nipple 6.5 5.5 4.5
Density g/cm³ (min) Electrode 1.6 1.58 1.68 1.65 1.68 1.7
Nipple 1.75 1.78 1.8
Flexure Strength Mpa (min) Electrode 10.0 8.0 10.5 9.8 11.0
Nipple 15.0 17.0 20.0
Elastic Modulus Gpa (max) Electrode 9.3 14.0 14.0
Nipple 14.0 16.0 22.0
Ash Content
% (max)		 Electrode 0.1 0.1 0.1
Nipple 0.1 0.1 0.1
CTE (100-600℃)
100-⁶/℃(max)		 Electrode 2.9 2.4 1.5
Nipple 2.7 2.2 1.4

Current Load

 

NOMINAL DIAMETER

 

REGULAR POWER

 

HIGH POWER

 

ULTRA HIGH POWER

 

MM

 Current Load (A) Current Density (A/cm²) Current Load (A) Current Density (A/cm²) Current Load (A) Current Density (A/cm²)
75 1000-1400 22-31        
100 1500-2400 19-30        
130 2200-3400 17-26        
150 3000-4500 16-25        
200 5000-6900 15-21 5500-9000 18-25    
250 7000-10000 14-20 8000-13000 18-25 8100-12200 20-30
300 10000-13000 14-18 13000-17400 17-24 15000-22000 20-30
350 13500-18000 14-18 17400-24000 17-24 20000-30000 20-30
400 18000-23500 14-18 21000-31000 16-24 25000-40000 19-30
450 22000-27000 13-17 25000-40000 15-24 32000-45000 19-30
500 25000-32000 13-16 30000-48000 15-24 38000-55000 18-27
550 28000-34000 12-14 34000-53000 14-22 45000-65000 18-27
600 30000-36000 11-13 38000-58000 13-21 50000-75000 18-26
650 32000-39000 10-12 41000-65000 12-20 60000-85000 18-25
700 34000-42000 9-11 45000-72000 12-19 70000-120000 18-30

Surface Quality

1,There are no more than two defects or holes on the surface of the electrode and the size shall not exceed the value in the following table.
2,There is no transverse crack or longitudinal crack with width of 0.3-1.0 on the surface of the electrode. The length of longitudinal crack is not more than 5% of the perimeter of the electrode. The crack with width less than 0.3mm shall be ignored.
3,The width of black skin area on the surface of the electrode is less than 1/10 of the perimeter of the electrode and its length is less than 1/3 of the length of the electrode.

 

SPECIFICATION

SIZE

 NOMINAL DIAMETER OF GRAPHITE ELECTRODE (MM)
75-225 250-400 450-800
Diameter(mm) 10-20 20-30 30-40
Depth(mm) 3-5 5-10 10-15

Graphite Electrode Size & Tolerance

DIAMETER (MM) LENGTH (MM)
Nominal Diameter Actual Diameter

 

Nominal Length

 

Tolerance

 

Short Length
Inch mm Max Min Rough spot
3 75 78 73 72 1000/1200/1400/1600

 

 

 

 

 

 

 

±100

 

 

 

 

 

 

 

-275
4 100 103 98 97 1000/1200/1400/1600
5 130 132 127 126 1000/1200/1400/1600
6 150 154 149 146 1200/1400/1600/1800
7 175 179 174 171 1200/1400/1600/1800
8 200 205 200 197 1600/1800
9 225 230 225 222 1600/1800
10 250 256 251 248 1600/1800/2000
12 300 307 302 299 1600/1800/2000/2200
14 350 358 352 349 1600/1800/2000/2200
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
26 650 663 659 656 2400/2700
28 700 714 710 707 2400/2700

Coupling Torque Reference For Nipple & Electrode

ELECTRODE DIAMETER Inch 8 9 10 12 14 16 18 20 22 24
mm 200 225 250 300 350 400 450 500 550 600
BREAKAWAY TORQUE n.m 200
- 260		 300
- 340		 400
- 450		 550
- 650		 800
- 950		 900
- 1100		 1100
- 1400		 1500
- 2000		 1900
- 2500

2400
- 3000

 

Dimension of Cylinder Nipples:
Norminal Diameter (mm) Size of Nipples (mm) Size of Sockets (mm) Thread (mm)
mm inch D d L D d H a b c
75 3 41.2 0
-0.5		 33.8 0
-0.5		 103.0 0
-1.0		 42.5 +0.50 35.1 +0.50 53.0 +7
0		 8.47 2.37 2.82
100 4 66.7 59.3 135.0 68.0 60.6 69.0
130 5 69.8 62.4 153.0 71.1 63.7 78.0
150 6 88.9 81.5 169.0 90.2 82.8 85.0
200 8 122.2 114.8 203.0 123.5 116.1 103.0
225 9 139.7 128.8 203.0 140.98 130.0 106.0 12.70 3.67 4.32
250 10 152.4 141.5 228.0 154.1 143.2 116.0
300 12 184.2 173.3 254.0 185.9 175.0 129.0
350 14 215.9 205.0 280.0 217.6 206.7 142.0
400 16 244.5 233.6 305.0 246.2 235.3 155.0
450 18 274.3 0
-0.7		 263.4 0
-0.7		 340.0 0
-2 .0		 276.0 +0.70 265.1 +0.70 172.5
500 20 296.0 285.1 375.0 297.7 286.8 190.0

Dimension of 3TPI Conical Nipples:
Norminal Diameter (mm) Size of Nipples (mm) Size of Sockets (mm) Thread (mm)
mm inch D L d 1 d H
225 9 139.7 0
-0.5		 203.2 0-1 90.73 0
-5		 <10 131.27 +0.5
0		 107.6 +7
0		 8.47
250 10 155.57 220.10 103.80 147.14 116.00
300 12 177.17 270.90 116.90 168.73 141.50
350 14 215.90 304.80 150.00 207.47 158.40
400 16 215.9 304.8 150 207.47 158.40
400 16 241.30 338.70 169.80 232.87 175.30
450 18 241.30 338.70 169.80 232.87 175.30
450 18 273.05 355.60 198.70 264.62 183.80
500 20 273.05 355.60 198.70 264.62 183.80
500 20 298.45 372.60 221.30 290.02 192.20

Dimension of 4TPI Conical Nipples:
Norminal Diameter (mm) Size of Nipples (mm) Size of Sockets (mm) Thread (mm)
mm inch D L d 1 d H
75 3 46.04 0
-0.5		 76.20 0
-1		 20.80 0
-5		 <7 39.72 +0.5
0		 44.10 +7
0		 6.35
100 4 69.85 101.60 40.30 63.53 56.80
130 5 79.38 127.00 45.60 73.06 69.50
150 6 92.08 139.70 56.20 85.76 75.90
200 8 122.24 177.80 80.00 115.92 94.90
225 9 139.70 177.80 97.46 133.38 94.90
250 10 152.40 190.50 108.00 146.08 101.30
300 12 177.80 215.90 129.20 171.48 114.00
350 14 203.20 254.00 148.20 196.88 133.00
400 16 222.25 304.80 158.80 215.93 158.40
400 16 222.25 355.60 150.00 215.93 183.80
450 18 241.30 304.80 177.90 234.98 158.40
450 18 241.30 355.60 169.42 234.98 183.80
500 20 269.88 355.60 198.00 263.56 183.80
500 20 269.88 457.20 181.08 263.56 234.60
550 22 298.45 355.60 226.58 292.13 183.80
550 22 298.45 457.20 209.65 292.13 234.60
600 24 317.50 355.60 245.63 311.18 183.30
600 24 317.50 457.20 228.70 311.18 234.60


RP Specifications:
Item Unit Norminal Diameter(mm)
75~130 150~225 250~300 350~500
Electric Resistivity Max Electrode μΩ·m 8.5 9.0 9.0 9.0
Nipples 6.5 6.5 6.5 6.5
Flexural Strength Min Electrode MPa 9.8 9.8 7.8 6.4
Nipples 13.0 13.0 13.0 13.0
Elastic Modulus Max Electrode GPa 9.3 9.3 9.3 9.3
Nipples 14.0 14.0 14.0 14.0
Bulk Density Min Electrode g/cm³ 1.58 1.52 1.52 1.52
Nipples 1.68 1.68 1.68 1.68
C.T.E. Max(100ºC~600ºC) Electrode 10¯6 /ºC 2.9 2.9 2.9 2.9
Nipples 2.7 2.7 2.8 2.8
Ash Max % 0.5 0.5 0.5 0.5

HP Specifications:
Item Unit Norminal Diameter(mm)
200~400 450~500 550~600
Electric Resistivity Max Electrode μΩ·m 6.8 7.5 7.0
Nipples 5.5 5.5 5.0
Flexural Strength Min Electrode MPa 10.5 9.8 10.0
Nipples 14.0 14.0 16.0
Elastic Modulus Max Electrode GPa 12.0 12.0 12.0
Nipples 16.0 16.0 18.0
Bulk Density Min Electrode g/cm³ 1.60 1.60 1.65
Nipples 1.70 1.70 1.75
C.T.E. Max(100ºC~600ºC) Electrode 10¯6 /ºC 2.4 2.4 2.4
Nipples 2.2 2.2 2.2
Ash Max % 0.3 0.3 0.3

UHP Specifications:
Item Unit Norminal Diameter(mm)
300~400 450~500 550~600
Electric Resistivity Max Electrode μΩ·m 6.2 6.3 5.8
Nipples 4.5 4.5 4.0
Flexural Strength Min Electrode MPa 11.5 11.5 11.0
Nipples 20.0 20.0 22.0
Elastic Modulus Max Electrode GPa 14.0 14.0 14.0
Nipples 20.0 20.0 22.0
Bulk Density Min Electrode g/cm³ 1.71 1.70 1.68
Nipples 1.76 1.78 1.80
C.T.E. Max(100ºC~600ºC) Electrode 10¯6 /ºC 1.5 1.5 1.5
Nipples 1.4 1.4 1.3
Ash Max % 0.3 0.3 0.3

Current-Carrying Capacity of RP graphite electrodes
Norminal diameter(mm) Current-Carrying Capacity(A) Current Density(A/cm²)
75 1000~1400 22-31
100 1500~2400 19-30
130 2200~3400 17~26
150 3000~4500 16-25
200 5000~6900 15-21
250 7000~10000 14-20
300 10000~13000 14~18
350 13500~18000 14~18
400 18000~23500 14~18
450 22000~27000 13~17
500 25000~32000 13~16
550 30000~42000 13~16
600 40000~53000 13~16

Current-Carrying Capacity of HP graphite electrodes
Norminal diameter(mm) Current-Carrying Capacity(A) Current Density(A/cm²)
200 5500~9000 18-28
250 8000~13000 18-25
300 13000~17400 17~24
350 17400~24000 17~24
400 21000~31000 16~24
450 25000~40000 15~24
500 30000~48000 15~24
550 44000~58000 15~24
600 52000~67000 15~24

Current-Carrying Capacity of UHP graphite electrodes
Norminal diameter(mm) Current-Carrying Capacity(A) Current Density(A/cm²)
300 15000~22000 20~30
350 20000~30000 20~30
400 25000~40000 19~30
450 32000~45000 19~27
500 38000~55000 18~27
550 45000~70000 18~27
600 50000~97000 18~27

 

 

 

 

Superior Quality Graphite Electrode UHP/HP/RP for Electric Arc Furnace 0

Superior Quality Graphite Electrode UHP/HP/RP for Electric Arc Furnace 1

 

Advantages of Graphite Electrode
* Good oxidation resistance
* High mechanical strength.
* Needle coke content accounts for 80%
* Low electrical resistivity,good electrical conductivity
* Low ash content,Its ash content is controlled within 3%
* Dense and uniform structure,Low graphite electrode consumption
* Annual output of 80,000 tons, timely delivery

Application:
Graphite electrodes are used mainly in ladle furnaces,electric-arc furnace steelmaking,Yellow phosphorus furnace , Industrial silicon furnace or melting copper. They are presently the only products available that have the high levels of electrical conductivity and the capability of sustaining the extremely high levels of heat generated in this demanding environment.High Quality Needle Coke in HP&UHP graphite electrode,ensure the electrode application is perfect. Graphite electrodes are also used to refine steel in ladle furnaces and in other smelting processes.

Superior Quality Graphite Electrode UHP/HP/RP for Electric Arc Furnace 2

Service
*Our engineers team know all of the EAF, Ladle, and Foundry applications throughout Asia (Include middleast countries),America and Africa.

*Our engineer team will visit our customer's factory every year, to check and analyse the customers' furnace conditions in order to achieve an optimal performance of the graphite electrodes and a decrease of the specific electrode consumption.

*Other services including train employees,performance analysis, storage in our warehouses, inspection of accessories, and monitoring the furnace.

Superior Quality Graphite Electrode UHP/HP/RP for Electric Arc Furnace 3

 

Quality Assurance & Control
· National Certified Laboratory
· Key testing instruments, including: specific resistor, bulk density meter, elasticmodulus meter, bending strength inspector, ash analysis meter, CTE analysis meter, etc.
· On-time instrument calibration
· On-site properties testing, including:
L-CTE,C-CTE
Specific resistance, bulk density,
Bending strength, ash content, elastic modulus

Superior Quality Graphite Electrode UHP/HP/RP for Electric Arc Furnace 4

 

Production Application:

  1. Core application in Electric Arc Furnace (EAF) steelmaking (accounting for over 70% of global consumption): Conduct electricity to generate high-temperature electric arcs for melting scrap steel, producing construction steel, automotive steel and specialty steel
  2. Facilitate non-ferrous metal smelting: Smelt metals such as copper, nickel and lead; also used in vacuum remelting of refractory metals like titanium to achieve purification and uniform composition
  3. Produce key industrial materials: Manufacture metallurgical-grade silicon, polysilicon (for solar energy/semiconductors), as well as phosphorus and ferroalloys in submerged arc furnaces
  4. Serve the electrochemical industry: Act as anodes in electrolytic refining of metals like copper and gold for purification, or as current collectors in fuel cells to ensure stable electricity transmission
  5. Support specialized industries: Assist in high-temperature production of glass/ceramics (reducing energy consumption); also used in laboratory high-temperature experiments and electrochemical analysis

 

Superior Quality Graphite Electrode UHP/HP/RP for Electric Arc Furnace 5

 

Superior Quality Graphite Electrode UHP/HP/RP for Electric Arc Furnace 6

 

 

 

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graphite rod

graphite electrodes