Production

Graphite electrodes are an important element of electric arc, ore-thermal, refined furnaces in the smelting of steel and alloys.

Graphite electrodes are an important element of electric arc, ore-thermal, refined furnaces in the smelting of steel and alloys.

Graphitized electrodes have a cylindrical shape of a given diameter and length. The material for the production of these products is petroleum coke, coal tar pitch, electrode combat. At the ends of the products, sockets with a cylindrical or metric thread are made to combine several parts using nipples into the column.

LLC "Leura Group" supplies graphite electrodes of the following brands:

  • UHP (EGSP) - for ultra-high power arc furnaces and powerful ladle furnaces.
  • SHP (EGPK) - for high-power arc and ladle furnaces.
  • HP (EGP) - for arc furnaces of average power.
  • RP (EG) - for low power arc furnaces

Electrode dimensions in diameter and nominal length.


Diameter Nominal length
мм max,mm min,mm 1500 1800 2100 2400 2700
250 256 251 * * *    
300 307 302 * * * *  
350 338 352 * * * *  
400 409 403 * * * * *
450 460 454 * * * * *
500 511 505 * * * * *
550 562 556 * * * * *
600 613 607 * * * * *

Physico-mechanical properties of graphite electrodes.


Name of the indicator Nominal diameter Brand of electrodes
ЭГ - RP ЭГП - НР ЭГПК - SHP ЭГСП - UHP
Specific resistance mOhm*m 225 - 750 7,0 - 11,0 5,0 - 7,5 4,5 - 6,5 4,0 - 6,0
Bulk density g/cm 3 225 - 450 1,55 - 1,65 1,65 - 1,75 1,65 - 1,78 1,65 - 1,78
500 - 750 1,54 - 1,64 1,65 - 1,75 1,65 - 1,75 1,65 - 1,75
Bending strength of MPa 225 - 450 6,5 - 14,0 9,0 - 17,0 9,0 - 14,0 9,0 - 14,0
500 - 750 6,5 - 9,5 8,0 - 15,0 8,0 - 13,0 8,0 - 13,0
Thermal coefficient
linear expansion
10 -6, К -1, no more than, in the interval
temperatures
(20-520)°С
(20-100)°С



225 - 750
-
-
-
-
1,7
0,2 - 0,9
1,5
0,2 - 0,7

Physical and mechanical properties of nipples.


Name of the indicator. Diameter Brand nipple
НС Н
Specific resistance mOhm*m, not more 225 - 750 5,5 7,0
Mechanical limit
Flexural strength, MPa, not less than for electrodes with a diameter
225 - 400 15,0 14,0
450 - 750 18,0 -
Volume density, g/cm 3, not less for electrodes with a diameter 225 - 400 1,70 1,65
450 - 750 1,74 -
Temperature coefficient
linear expansion
10 -6, К -1, no more than, in the interval
temperatures
(20-520) ° С
(20-100) ° С
200 - 750 1,5 -
0,2 - 0,7 -