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Graphite plate
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Ultra-High Power Graphite Electrode
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Factory direct sale! UHP ultra-high power electrodes, specifically designed for electric arc furnaces and refining furnaces.
UHP Ultra-High Power Graphite Electrode Details UHP (Ultra-High Power) graphite electrodes are a core conductive material in modern metallurgical industries, designed to withstand extreme current loads. They are primarily used in electric arc furnace steelmaking and high-end alloy smelting, an...
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UHP Ultra-High Power Graphite Electrode Details
UHP (Ultra-High Power) graphite electrodes are a core conductive material in modern metallurgical industries, designed to withstand extreme current loads. They are primarily used in electric arc furnace steelmaking and high-end alloy smelting, and their advantages of low energy consumption and high stability make them a key consumable for industrial upgrading.
I. Core Definition and Performance Advantages
- Core Positioning: Capable of withstanding current densities above 25 A/cm² (up to 40 A/cm²), achieving efficient melting through high-temperature electric arcs exceeding 3000°C generated between the electrode tip and the furnace charge. They are a core component of ultra-high power electric arc furnaces (EAFs) and refining furnaces.
- Key Performance Parameters:
- Electrical Conductivity: Resistivity ≤ 6.2 μΩ·m (some high-end products as low as 4.2 μΩ·m), far superior to ordinary high-power (HP) electrodes;
- Mechanical Strength: Flexural strength ≥ 10 MPa (joints can reach over 20 MPa), able to withstand charging impacts and electromagnetic vibrations;
- Thermal Stability: Coefficient of thermal expansion only 1.0-1.5 × 10⁻⁶/℃, not prone to cracking or spalling under rapid heating and cooling;
- Chemical Characteristics: Ash content ≤ 0.2%, density 1.64-1.76 g/cm³, strong oxidation and corrosion resistance, resulting in lower consumption per ton of steel.
II. Core Production Process and Raw Materials
- Key Raw Materials: Using 100% high-quality petroleum-based needle coke (ensuring low expansion and high conductivity), combined with modified medium-temperature pitch binder (softening point 108-112°C) and low quinoline insoluble (QI ≤ 0.5%) impregnating agent. - Core Process: The process involves ingredient mixing and kneading → extrusion molding → calcination (twice) → high-pressure impregnation (once for the electrode body, three times for the connector) → graphitization (in-line process at over 2800℃) → mechanical processing. Precise temperature control and parameter optimization ensure product accuracy (straightness tolerance ±10mm/50m) and performance stability.
- Process Innovation: The optimized "one impregnation, two calcination" process shortens the production cycle by 15-30 days compared to traditional methods, reducing costs by approximately 2000 RMB/ton, while maintaining excellent thermal shock resistance.
III. Main Application Scenarios
- Leading Field: AC/DC ultra-high power electric arc furnace steelmaking, used in the production of high-quality alloy steel and special steel, improving smelting efficiency by more than 30% and reducing energy consumption by 15%-20%;
- Expanded Applications: Smelting of high-end materials such as industrial silicon, ferrosilicon, and yellow phosphorus in submerged arc furnaces, as well as the production of high-temperature products such as corundum and abrasives, adaptable to different specifications of electric furnaces (diameter 12-28 inches, current carrying capacity 22000-120000A).
IV. Industry Value and Development Trends
- Core Value: Driving the transformation of electric arc furnace steelmaking towards "faster, cleaner, and more efficient" processes, it is a key material for energy saving and emission reduction in the steel industry and for coping with carbon tariffs. Its market share is expected to exceed 60% of the total graphite electrode demand by 2025, with a price of approximately 18,000 RMB/ton;
- Technological Direction: Focusing on graphene coating modification (reducing contact resistance by 40%), silicon carbide composite reinforcement, intelligent manufacturing (digital twin process simulation), and circular economy (dust recovery rate 99.9%+ waste heat recovery), to further improve lifespan and environmental friendliness.
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