◎ Higher purity, higher density, and greater chemical stability;
◎ Low coefficient of thermal expansion, resistance to cracking, spalling and thermal shock;
◎ Higher mechanical strength and lower electrical resistivity;
◎ Higher machining accuracy and good surface finish;
◎ The advanced antioxidant treatment process, lower consumption, and longer operation life.
Application
Ultra High Power (UHP) Graphite Electrodes are widely used in various DC/AC Ultra-high Power (UHP) Electric Arc Furnace, Ladle Refining Furnace, and Submerged Arc Furnace for smelting various kinds of high quality alloy steel, metals,etc. for its excellent performance.
Selection
Graphite electrodes are selected based on some of the following application considerations: • Furnace design • Scrap requirements • Charging practice • Burner/Oxygen usage • Water spray rings • Fume control system • Meltdown/Refine/Tap-to-Tap Time • Power level • Slag practice
Physical & Chemical Properties of UHP Graphite Electrodes
Items
Classification
Unit
Nominal Diameter (mm)
250-400
450-500
550-650
700-800
Resistivity
Electrode
μΩm
≤
6.2
6.3
6.0
5.8
Nipple
5.3
5.3
4.5
4.3
Bending Strength
Electrode
Mpa
≥
10.5
10.5
10.0
10.0
Nipple
20.0
20.0
22.0
23.0
Young’s Modulus
Electrode
Gpa
≤
14.0
14.0
14.0
14.0
Nipple
20.0
20.0
22.0
22.0
Bulk Density
Electrode
g/cm3
≥
1.67
1.66
1.66
1.68
Nipple
1.74
1.75
1.78
1.78
CTE(100℃-600℃)
Electrode
×10-6/℃
≤
1.5
1.5
1.5
1.5
Nipple
1.4
1.4
1.3
1.3
Ash Content
Electrode
%
≤
0.5
0.5
0.5
0.5
Nipple
Recommended current load of UHP Graphite Electrodes