Petroleum coke is a carbonaceous solid derived from oil refinery cocker units or other cracking process. Petroleum coke can be devided into low sulfur petroleum coke,sulfur petroleum coke and high sulfur petroleum coke,petroleum coke for making graphite,smelting and chemical industries.
Petroleum coke is a carbonaceous solid derived from oil refinery cocker units or other cracking process. Petroleum coke can be devided into low sulfur petroleum coke,sulfur petroleum coke and high sulfur petroleum coke,petroleum coke for making graphite,smelting and chemical industries.
Artificial graphite electrode is made of high-quality low ash materials, such as petroleum coke, needle coke
and coal pitch.after calcining,burdening,kneading,forming,baking and pressure impregnation, graphitization
and then precision machined with professional CNC machining.such of the products own characteristics with
low resistivity, good electrical conductivity ,low ash, compact structure,good anti oxidation and high mechanical strength, so it is the best conductive material for electric arc furnace and smelting furnace.
China dia 550mm HP graphite electrode plant price manufactures
China dia 550mm HP graphite electrode plant price manufactures
HP Size and Tolerance
Diameter (mm)
Length (mm)
Nominal diameter
Actual diameter
Nominal length
Tolerance
Short feet length
mm
inch
max
min
mm
mm
max
min
200
8
209
203
1600/1800/
2000/2200/
2400/2700
±100
-100
-275
250
10
258
252
300
12
307
302
350
14
357
352
400
16
409
403
450
18
460
454
500
20
511
505
550
22
556
553
600
24
613
607
Physical and Chemical Index of HP
Items
unit
Diameter: 250-600mm
Standard
Test data
Electrode
Nipple
Electrode
Nipple
Electrical resistance
μΩm
6.5-7.5
6.0
6.0-7.0
5.5
Flexure strength
Mpa
9.8-10.5
14
12-15
15-18
Modulus of elasticity
GPa
12
16
12
14
Ash content
%
0.2
0.2
0.2
0.2
Apparent density
g/cm3
1.6
1.7
1.68-1.73
1.75
Factor of expansion(100-600)
x10-6/
2.4
2.2
2.2
2.0
Operating instruction
1. Use special hoist tools to hoist graphite electrode. It is strictly forbad to prize electrode ends up with crowbar. It must be handled with great care during transport to avoid being struck.
2. Graphite electrode must be kept away from being moistened or wetted by rain, snow and water, and must be kept dry.
3. Carefully checking before making connection, make sure that socket and nipple thread is not damaged, nipple pitch plug is in.
4. Blow the nipple and socket threads with compressed air.
5. It must be dried in the furnace before use, the drying temperature in the furnace should be less than 150,the drying period should be more 30 hours
6. Graphite electrode must be connected and contacted closely and straightly.Use moment spanner for connecting electrode with suitable force. Mustnt decline.
7. The holding device must hold the electrode tightly, good contact and no arc.
8. To avoid the electrode breakage, put the large materials in lower part and small materials in the upper part. Insulating materials should not be put into the furnace. The working current of electrode must be conformity with the allowable current of electrode in the instructions.
RP Graphite electrode,HG Graphite electrode,UHP graphite electrode
Resistivity: 4.8-6 3.5-5
Bending Strength:10-14 Mpa 20-24 MPa
Young's Modulus: Electrode 9.0-13 Nipple 15-18
Bulk Density: Electrode 1.68-1.74 Nipple: 1.77-1.82
CTE: Electrode 1.1-1.4 Nipple 0.9-1.2
HP graphite electrode is mainly used for ultra high power electric arc furnaces with the current density range of 18-25A/cm2.
>Anti-oxidation treatment for longevity.
>High-purity,high-density,strong chemical stability.
>High machining accuracy,good surface finishing.
>High mechanical strength,low electrical resistance.
>Resistant to cracking & spalling.
>High resistance to oxidation and thermal shock.
