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350mm UHP Graphite Electrode – Premium Ultra High Power Solution for EAF Steelmaking
The 350mm UHP graphite electrode is ideal for large-capacity EAF steelmaking, enabling fast melting of scrap and DRI with stable current and low consumption. It’s also suitable for ladle refining and high-temperature ferroalloy and non-ferrous metal smelting, enhancing productivity and steel purity.
Description
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Product Overview
The 350mm Ultra High Power (UHP) graphite electrode is designed for extreme electrical and thermal conditions in Electric Arc Furnaces (EAFs), Ladle Furnaces (LFs), and Submerged Arc Furnaces (SAFs). Manufactured from 100% premium petroleum-based needle coke and ultra-low sulfur coal tar pitch, these electrodes undergo high-pressure forming (via extrusion or isostatic pressing), multi-stage baking, and ultra-high-temperature graphitization above 2800°C.
Precision CNC machining ensures accurate thread profiles, optimal nipple fit, and low contact resistance, resulting in stable arc performance, superior conductivity, and minimal electrode consumption.
Technical Specifications – 350mm UHP Electrode
| 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 | — | 20000 ~ 30000 |
| Current Density | A/cm² | — | 20 ~ 30 |
| Actual Diameter | mm | Max: 358 Min: 352 | — |
| Actual Length (Customizable) | mm | 1600 – 2400 | — |
| Length Tolerance | mm | ±100 | — |
| Short Ruler Length | mm | -275 | — |
Core Performance Advantages
● Ultra-High Electrical Conductivity
Supports rapid arc initiation and stable current flow in high-capacity furnaces.
● Excellent Thermal Shock Resistance
Low thermal expansion minimizes cracking during rapid temperature changes.
● Robust Mechanical Strength
Withstands mechanical stresses during operation, charging, and clamping.
● Low Impurity Content
Reduced ash, sulfur, and volatiles decrease slag formation and enhance steel purity.
● Precision-Machined Nipples
CNC-machined threads ensure a tight electrode-nipple fit, lowering joint resistance and improving conductivity.
Application Scenarios
● Primary EAF Steelmaking
Ideal for melting scrap and DRI in large-capacity EAFs, offering fast melting cycles and high energy efficiency.
● Ladle Furnace (LF) Secondary Refining
Maintains temperature consistency and limits reoxidation during alloying and desulfurization.
● Ferroalloy Production in SAFs
Endures continuous high-temperature operations in silicon-manganese, ferrochrome, and calcium carbide smelting.
● High-Purity Non-Ferrous Metallurgy
Used in melting aluminum, copper, and titanium alloys where low contamination is critical.
Manufacturing & Quality Assurance
● Raw Materials: Premium needle coke with sulfur ≤ 0.03%, low ash, and volatiles.
● Forming & Baking: Isostatic/extrusion forming, followed by multi-stage baking up to 900°C for dimensional stability.
● Graphitization: Processed at ≥ 2800°C for maximum crystalline alignment and conductivity.
● CNC Precision Machining: Electrodes and nipples machined to tight tolerances for smooth jointing.
● Testing Standards: Compliant with ASTM C1234, IEC 60239, GB/T 20067, and subject to ultrasound, resistivity, and strength testing.
End-User Benefits
● Reduced Electrode Consumption Rate (ECR)
High density and low porosity result in less wear and fewer replacements.
● Improved Energy Efficiency
Lower resistivity enables faster melting and reduced energy (kWh/t) use.
● Superior Steel Cleanliness
Low impurities ensure minimal slag and fewer non-metallic inclusions.
● Extended Service Life
Longer operating cycles and reduced downtime through mechanical durability.
Conclusion
The 350mm UHP graphite electrode offers an optimal balance of electrical performance, mechanical integrity, and thermal resilience. Engineered for efficiency and reliability, it reduces operational costs, improves steel quality, and maximizes furnace uptime—making it the preferred choice for modern EAF and LF operations in global steel and alloy production facilities.
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