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300mm UHP Graphite Electrode – Premium Ultra High Power Graphite Solution for High-Performance EAF Systems
Suitable for high-power electric arc furnaces, ladle refining furnaces, and ferroalloy furnaces, the 300mm UHP graphite electrode offers exceptional electrical conductivity and heat resistance, making it an ideal electrode solution for high-speed smelting and energy-efficient steelmaking.
Description
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Product Overview
The 300mm UHP (Ultra High Power) graphite electrode is a high-performance conductive material specifically designed for Electric Arc Furnace (EAF) steelmaking, ladle refining (LF), and submerged arc furnace (SAF) ferroalloy production under extreme current, thermal, and mechanical conditions. Engineered from high-grade petroleum needle coke and ultra-low-sulfur coal tar pitch, these electrodes undergo high-pressure forming, multi-stage baking, >2800°C graphitization, and CNC-precision machining to deliver superior electrical conductivity, low consumption, and unmatched durability.
UHP graphite electrodes are essential for modern, energy-efficient steel production—supporting faster melting, lower kWh/t consumption, and extended service life under ultra-high current density environments.
Key Technical Specifications (300mm UHP)
| Parameter | Unit | Electrode | Nipple |
| Resistivity | μΩ·m | 4.8 ~ 5.8 | 3.4 ~ 4.0 |
| Bending Strength | MPa | ≥ 12.0 | ≥ 22.0 |
| Elastic Modulus | GPa | ≤ 13.0 | ≤ 18.0 |
| Bulk Density | g/cm³ | 1.68 ~ 1.73 | 1.78 ~ 1.84 |
| Thermal Expansion Coefficient | 10⁻⁶/°C | ≤ 1.2 | ≤ 1.0 |
| Ash Content | % | ≤ 0.2 | ≤ 0.2 |
| Allowable Current | A | — | 15000 ~ 22000 |
| Current Density | A/cm² | — | 20 ~ 30 |
| Actual Diameter | mm | Max: 307 Min: 302 | — |
| Actual Length (Customizable) | mm | 1600–1800 | — |
| Length Tolerance | mm | ±100 | — |
| Short Ruler Length | mm | -275 | — |
Performance Advantages
● Ultra-High Electrical Conductivity
Supports rapid arc heating and efficient melting cycles with lower energy loss.
● Superior Thermal Shock Resistance
Low thermal expansion coefficient minimizes cracking under rapid heat fluctuations.
● Enhanced Mechanical Strength
Outstanding flexural and compressive strength ensures minimal breakage during use and connection.
● Low Impurity Content
Ultra-low ash, sulfur, and volatiles help produce cleaner molten steel and reduce slag formation.
● Precision-Engineered Threads
CNC-machined joint threads (3TPI/4TPI/M60) ensure tight connectivity and low joint resistance for stable arcs.
Typical Applications
● Primary EAF Steelmaking
Ideal for melting steel scrap and DRI in high-power furnaces requiring quick and stable heat input.
● Ladle Furnace (LF) Refining
Ensures accurate temperature holding and low impurity transfer during secondary metallurgy.
● Ferroalloy Production in SAF
Perfect for continuous high-load smelting of ferroalloys such as FeMn, FeCr, and CaC₂.
● Non-Ferrous & Special Alloy Smelting
Suitable for high-purity melting of copper, aluminum, and other sensitive alloys.
Manufacturing & Quality Control
● Raw Material Selection
Imported needle coke (S ≤ 0.03%, low VM) for superior carbon matrix integrity.
● Forming & Baking
Isostatic pressing and staged baking at up to 900°C for uniform density and stability.
● Graphitization
2800°C treatment for high crystallinity, enhancing conductivity and durability.
● CNC Finishing
Precision turning of body and nipple threads (3TPI / 4TPI / M60) ensures reliable assembly.
● Standardized Testing
Conforms to ASTM C1234, IEC 60239, and GB/T 20067—includes ultrasonic, resistivity, density, and strength testing.
End-User Benefits
● Reduced Electrode Consumption (ECR)
High-density, low-porosity design decreases consumption per ton of molten steel.
● Improved Electrical Efficiency
Lower resistivity helps reduce kWh/t and shorten production cycles.
● Cleaner Steelmaking
Lower sulfur and ash content support the production of ultra-clean steel grades.
● Extended Lifespan & Operational Reliability
Minimized breakage and oxidation lead to fewer changeovers and higher productivity.
Conclusion
The 300mm UHP graphite electrode offers the highest level of performance, conductivity, and thermal endurance for large-scale EAF and LF operations. Optimized for high-efficiency melting and metallurgical precision, this premium-grade electrode helps steelmakers reduce energy consumption, lower operational costs, and produce cleaner steel with longer arc stability and minimal wear—making it a core component for the next-generation electric steelmaking industry.
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