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High-Density Graphite Electrodes
High-density graphite electrodes are made of high-quality petroleum coke, coal tar and other raw materials, through calcining, crushing, screening, dosing, kneading, forming, baking, graphitization, machining.

Description

High-density graphite electrodes are made of high-quality petroleum coke, coal tar and other raw materials, through calcining, crushing, screening, dosing, kneading, forming, baking, graphitization, machining. 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 to smelt various alloy steels, yellow phosphorus, industrial silicon, brown corundum, and other alloys and non-metal materials.


Electrode specifications:

Nominal diameter (mm)Actual diameter (mm)length (mm)*
mminchMaximum valueMinimum valueMinimum value of black skin
7537873721600
100410398971600
13051321271261600
15061541491461800
20082052001971800
22592302252221800
250102562512481800
300123073022991800
350143573523491800
400164094034001800.2100
450184604544511800.2100
500205115055021800.2100
550225625565532100.2400
600246136076042100.2400


Connector specifications: Cylindrical joint and joint hole size

Nominal diameter (mm)Connector size (mm)Connector hole size (mm)Screw pitch (mm)
mminchDdLDdHabc
75341.20    -0.533.80    -0.5103.00    -1.042.5+0.5035.1+0.5053.0+7    08.472.372.82
100466.759.3135.068.060.669.0
130569.862.4153.071.163.778.0
150688.981.5169.090.282.885.0
2008122.2114.8203.0123.5116.1103.0
2259139.7128.8203.0140.98130.0106.012.703.674.32
25010152.4141.5228.0154.1143.2116.0
30012184.2173.3254.0185.9175.0129.0
35014215.9205.0280.0217.6206.7142.0
40016244.5233.6305.0246.2235.3155.0
45018274.30    -0.7263.40    -0.7340.00    -2 .0276.0+0.70265.1+0.70172.5
50020296.0285.1375.0297.7286.8190.0


3Buckle conical joint and joint hole

Nominal diameter(mm)Connector size (mm)Connector hole size (mm)Screw pitch(mm)
mminchDLd1dH
2259139.70    -0.5203.20-190.730    -5<10131.27+0.5    0107.6+7    08.47
25010155.57220.10103.80147.14116.00
30012177.17270.90116.90168.73141.50
35014215.90304.80150.00207.47158.40
40016215.9304.8150207.47158.40
40016241.30338.70169.80232.87175.30
45018241.30338.70169.80232.87175.30
45018273.05355.60198.70264.62183.80
50020273.05355.60198.70264.62183.80
50020298.45372.60221.30290.02192.20


4Buckle conical joint and joint hole size

Nominal diameter (mm)Connector size (mm)Connector hole size(mm)Screw pitch(mm)
mminchDLd1dH
75346.040    -0.576.200    -120.800    -5<739.72+0.5    044.10+7    06.35
100469.85101.6040.3063.5356.80
130579.38127.0045.6073.0669.50
150692.08139.7056.2085.7675.90
2008122.24177.8080.00115.9294.90
2259139.70177.8097.46133.3894.90
25010152.40190.50108.00146.08101.30
30012177.80215.90129.20171.48114.00
35014203.20254.00148.20196.88133.00
40016222.25304.80158.80215.93158.40
40016222.25355.60150.00215.93183.80
45018241.30304.80177.90234.98158.40
45018241.30355.60169.42234.98183.80
50020269.88355.60198.00263.56183.80
50020269.88457.20181.08263.56234.60
55022298.45355.60226.58292.13183.80
55022298.45457.20209.65292.13234.60
60024317.50355.60245.63311.18183.30
60024317.50457.20228.70311.18234.60


Physical and chemical indicators:

projectunitNominal diameter(mm)
75~130150~225250~300350~500
Resistivity ≤ElectrodeμΩ·m8.59.09.09.0
Connector6.56.56.56.5
Flexural strength ≤ElectrodeMPa9.89.87.86.4
Connector13.013.013.013.0
Flexibility ≤ElectrodeGPa9.39.39.39.3
Connector14.014.014.014.0
Bulk density ≥Electrodeg/cm³1.581.521.521.52
Connector1.681.681.681.68
Thermal expansion coefficient ≤(100℃~600℃)Electrode10¯⁶ /℃2.92.92.92.9
Connector2.72.72.82.8
Ash ≤%0.50.50.50.5
Note: Ash content and thermal expansion coefficient are reference indicators


Current load:

Nominal diameter(mm)Allowable current load(A)Current density(A/cm²)
751300~200029-45
1001800~300022-37
1302800~420021~31
1504000~500022-28
2004800~900015-28
2508000~1200016-24
30011000~1600015~22
35015000~2200015~22
40020000~2800015~22
45024000~3400015~21
50028000~4200013~20


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.


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