HP Graphite Electride

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What is HP Graphite Electrode?

High Power Graphite Electrodes are a type of graphite electrodes that are designed to withstand higher current densities and more severe operating conditions compared to regular power graphite electrodes. These electrodes are primarily used in electric arc furnaces (EAFs) for steelmaking processes that require higher power inputs and more demanding performance characteristics.

AGRM is a full-process manufacturer, owning the entire process of graphite electrode production including coking, calcination, forming, first baking, impregnation, second baking in tunnel kilns, graphitization, machining, and other processes. The production cycle is 3 to 6 months, and there is inventory in each link of the production process. The long-term inventory is around 10,000 tons, with an annual production capacity of 30,000 tons.

As a professional graphite electrode manufacturer, we also offer RP graphite electrodes and UHP graphite electrodes. The diameter of HP graphite eletrode ranges from 200 mm to 600 mm. It is mainly used for high-power electric arc furnaces with a current density range of 18–25 A/cm2.
The demand for larger diameter electrodes has been on the rise with the increase in size of EAF furnaces. Graphite electrodes with diameters of 500 mm or 600 mm have seen growing popularity in recent years.

graphite electrode production process

Application of Graphite Electrode

Graphite electrodes are widely used for the production of alloy steels, metal and other nonmetallic materials, etc. in different types of furnaces. HP graphite electrodes are usually used in DC electric arc furnace, AC electric arc furnace and submerged arc furnace etc.

GRAPHITE electrode for AC arc furnace

Graphite Electrode for AC Arc Furnace

graphite electrode for DC arc furnace

Graphite Electrode for DC Arc Furnace

graphite electrodes submerged arc furnace

Electrodes Submerged Arc Furnace

Key Points about High Power Graphite Electrodes

Composition

High Power Graphite Electrodes are manufactured using high-quality petroleum coke, coal tar pitch, and other carbonaceous materials similar to regular power electrodes. However, they are typically produced with higher graphitization levels and more stringent quality control measures to enhance their electrical conductivity and mechanical strength.

Electrical Conductivity

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

Sizes and Specifications

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 steelmaking operation.

Mechanical Strength

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

Application

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

HP Graphite Electrodes Specification

Technical Specification of HP Graphite Electrode

DiameterResistance
(≤, 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)
inchmm
82006.51.6210.5120.32.45500–900018–25
92256.51.6210.5120.32.46500–1000018–25
102506.51.6210.5120.32.48000–1300018–25
123006.51.6210.5120.32.413000–1740017–24
143506.51.6210.5120.32.417400–2400017–24
164006.51.6210.5120.32.421000–3100016–24
184506.51.609.8120.32.425000–4000015–24
205006.51.609.8120.32.430000–4800015–24
225506.51.609.8120.32.437000–5700015–23
246006.51.609.8120.32.444000–6700015–23

Graphite Electrode Size & Tolerance

Diameter (mm)Length (mm)
Nominal DiameterActual DiameterNominal LengthToleranceShort Length
(inch)(mm)(max.)(min.)(rough spot)
82002052001971600±100-275
92252302252221600
102502562512481600/1800
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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