High-power graphite electrodes are made of high-quality petroleum coke, needle coke, coal tar and other raw materials, through calcining, crushing, screening, dosing, kneading, forming, baking, graphitization, machining, etc. Compact and uniform structure, good electrical conductivity, good thermal conductivity, high mechanical strength, and strong resistance to oxidation and corrosion at high temperatures. It is widely used in electric arc furnaces and ladle refining furnaces for smelting various alloy steels, yellow phosphorus, industrial silicon, brown corundum and other alloys Non-metallic materials.
Electrode specifications:
Nominal diameter (mm) | Actual diameter (mm) | length (mm)* |
mm | inch | Maximum value | Minimum value | Minimum value of black skin |
75 | 3 | 78 | 73 | 72 | 1600 |
100 | 4 | 103 | 98 | 97 | 1600 |
130 | 5 | 132 | 127 | 126 | 1600 |
150 | 6 | 154 | 149 | 146 | 1800 |
200 | 8 | 205 | 200 | 197 | 1800 |
225 | 9 | 230 | 225 | 222 | 1800 |
250 | 10 | 256 | 251 | 248 | 1800 |
300 | 12 | 307 | 302 | 299 | 1800 |
350 | 14 | 357 | 352 | 349 | 1800 |
400 | 16 | 409 | 403 | 400 | 1800.2100 |
450 | 18 | 460 | 454 | 451 | 1800.2100 |
500 | 20 | 511 | 505 | 502 | 1800.2100 |
550 | 22 | 562 | 556 | 553 | 2100.2400 |
600 | 24 | 613 | 607 | 604 | 2100.2400 |
Connector specifications:
Cylindrical joint and joint hole size
Nominal diameter (mm) | Connector size (mm) | Connector hole size (mm) | Screw pitch (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 |
3Buckle conical joint and joint hole
Nominal diameter(mm) | Connector size (mm) | Connector hole size (mm) | Screw pitch(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 |
4Buckle conical joint and joint hole size
Nominal diameter (mm) | Connector size (mm) | Connector hole size(mm) | Screw pitch (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 |
Physical and chemical indicators:
Project | Unit | Nominal diameter(mm) |
200~400 | 450~500 | 550~600 |
Resistivity ≤ | Electrode | μΩ·m | 6.8 | 7.5 | 7.0 |
Connector | 5.5 | 5.5 | 5.0 |
Flexural strength ≤ | Electrode | MPa | 10.5 | 9.8 | 10.0 |
Connector | 14.0 | 14.0 | 16.0 |
Flexibility ≤ | Electrode | GPa | 12.0 | 12.0 | 12.0 |
Connector | 16.0 | 16.0 | 18.0 |
Bulk density ≥ | Electrode | g/cm³ | 1.60 | 1.60 | 1.65 |
Connector | 1.70 | 1.70 | 1.75 |
Thermal expansion coefficient ≤(100℃~600℃) | Electrode | 10¯⁶ /℃ | 2.4 | 2.4 | 2.4 |
Connector | 2.2 | 2.2 | 2.2 |
Ash ≤ | % | 0.3 | 0.3 | 0.3 |
Note: Ash content and thermal expansion coefficient are reference indicators |
Current load:
Nominal diameter(mm) | Allowable current load(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 |
Export packing:
The packing is made of wood and plywood with strip steel outside and plastic outside. The solid wood slat is used to protect the graphite electrodes, the nipples and sockets are protected by foam hat first then by plywood outside, the plastic inside has effect of moisture proof and dust proof, with 6-8 steel strips outside, beautiful and firm which suitable for land and sea transportation.
Precautions for use:
1.When selecting electrode diameter for steel making, please refer to electrode current capacity.
2.Graphite electrodes should be protected from rain and snow during transportation and storage. Before use, they must be dried.
3.Graphite electrodes should be handled with care during loading, unloading, and transportation to protect the threads and prevent damage.
4.Before connecting the electrode, the electrode socket thread must be blown out with compressed air, and then the nipples and the electrode should be tightened.
5.The electrode lifting device of the electrode should not shake during operation to prevent the nipples from loosening and tripping.
6.The electrode holder must not hold the electrode near the nipple socket.
7.When charging the furnace, a large steel block should be placed at the lower part to prevent the material from collapsing and breaking the electrode during melting.