UHP Graphite Electrode

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What is UHP Graphite Electrode?

UHP graphite electrode refers to ultra high power graphite electrode, it is a specialized type of graphite electrodes designed to withstand extremely high current densities and demanding operating conditions in electric arc furnaces (EAFs). These electrodes are specifically engineered to meet the requirements of ultra-high-power steelmaking processes, where higher power inputs are needed to melt large quantities of scrap steel and produce high-quality steel products.

uhp graphite electrode

Application of UHP Graphite Electrode

UHP graphite electrodes play a crucial role in a wide range of industrial applications where high temperatures, electrical conductivity, and resistance to thermal and mechanical stress are required. Their versatility and reliability make them indispensable components in modern manufacturing processes.

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Key Points about High Power Graphite Electrodes

Composition

Ultra High Power Graphite Electrodes are typically manufactured using high-quality petroleum coke, coal tar pitch, and other carbonaceous materials. They undergo advanced processing techniques and stringent quality control measures to achieve superior electrical conductivity, thermal resistance, and mechanical strength.

Electrical Conductivity

Ultra High Power Graphite Electrodes exhibit exceptional electrical conductivity, allowing them to efficiently conduct electricity and generate intense heat during the steelmaking process. They are capable of withstanding extremely high current densities, making them suitable for ultra-high-power applications.

Sizes and Specifications

Ultra High Power Graphite Electrodes are available in various sizes and specifications to suit different furnace capacities and operating conditions. The diameter, length, and current-carrying capacity of the electrodes can be customized based on the specific requirements of the ultra-high-power steelmaking operation.

Mechanical Strength

Ultra High Power Graphite Electrodes are engineered to withstand the mechanical stresses and thermal shocks experienced during ultra-high-power steelmaking operations. They possess exceptional mechanical strength and resistance to breakage, deformation, and oxidation at elevated temperatures.

Application

Ultra High Power Graphite Electrodes are used in EAFs for ultra-high-power steelmaking processes that require exceptionally high power inputs and demanding performance characteristics. These electrodes are employed in applications such as the production of high-quality steel grades, specialty steel alloys, and advanced steel refining processes.

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Features:

  • Capable of withstanding large currents and high discharge rates.
  • Exhibits excellent dimensional stability, minimizing the risk of deformation.
  • Resistant to cracking and spalling, ensuring long-term durability.
  • Demonstrates high resistance to oxidation and thermal shock.
  • Possesses high mechanical strength and low electrical resistance.
  • Offers superior machining accuracy and achieves a high-quality surface finish.

Why Graphite Electrode?

Graphite material offers superior electrochemical stability, resulting in a low loss ratio for electrodes made from this material. Additionally, graphite electrodes are easier to process and exhibit significantly faster processing speeds compared to copper electrodes. Furthermore, graphite’s lightweight nature and excellent thermal and electrical conductivity make it a preferred choice for various applications.

UHP Graphite Electrodes Specification

Technical Specification of UHP Graphite Electrode

Dia.
(inch)
Resistance
(≤, µΩ·m)
Density
(≥, g/cm3)
Flexure Strength
(≥, MPa)
Elastic Modulus
(≤, GPa)
Ash Content
(≤, %)
CTE
(100 °C – 600 °C)
(≤, 10-6/°C)
Current Load
(A)
Current Density
(A/cm2)
105.51.6711140.31.58100–1220020–30
125.51.6711140.31.515000–2200020–30
145.51.6711140.31.520000–3000020–30
165.51.6711140.31.525000–4000019–30
185.51.6611140.31.532000–4500019–27
205.51.6611140.31.438000–5500018–27
225.51.6611140.31.442000–6600017–26
245.51.6611140.31.449000–7600017–26

Graphite Electrode Size & Tolerance

Diameter (mm)Length (mm)
Nominal DiameterActual DiameterNominal LengthToleranceShort Length
(inch)(mm)(max.)(min.)(rough spot)
102502562512481600/1800±100-275
123003073022991600/1800
143503573523491600/1800
164004094034001600/1800/2000/2200
184504604544511600/1800/2000/2200
205005115055021800/2000/2200/2400
225505625565531800/2000/2200/2400
246006136076042000/2200/2400
SpecificationDefect Dimension
Nominal Diameter of Graphite Electrode (mm)
300–400450–600
Diameter (mm)20–40
(< 20 mm should be negligible)
30–50
(< 30 mm should be negligible)
Depth (mm)5–10
(< 5 mm should be negligible)
10–15
(< 10 mm should be negligible)
ItemRP Graphite ElectrodeHP Graphite ElectrodeUHP Graphite Electrode
Nominal Diameter/mmCurrent Carrying Capacity/ACurrent Density/(A/cm2)Current Carrying Capacity/ACurrent Density/(A/cm2)Current Carrying Capacity/ACurrent Density/(A/cm2)
1503000-450016-25    
2005000-690015-215500-900018-25  
2507000-1000014-208000-1300018-25  
30010000-1300014-1813000-1740017-2415000-2200020-30
35013500-1800014-1817400-2400017-2420000-3000020-30
40018000-2350014-1821000-3100016-2425000-4000019-30
45022000-27000013-1725000-4000015-2432000-4500019-27
50025000-3200013-1630000-4800015-2438000-5500018-27
55028000-3400012-1434000-5300014-2245000-6500018-27
60030000-3600011-1338000-5800013-2150000-7500018-26
65032000-3900010-1241000-6500012-2060000-8500018-25
70034000-420009-1145000-7200012-1970000-12000018-30
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