200mm-300mm Graphite Electrodes

(1) Raw Material Preparation

Material Selection: High-quality needle coke and coal tar pitch are used as primary raw materials to ensure excellent conductivity and mechanical strength.

Mixing & Blending: The coke and binder (pitch) are homogenized in precise ratios for consistent composition.

(2) Forming Process

Extrusion Molding: A hydraulic extruder shapes the mixture into cylindrical green electrodes.

Vibration Molding (Optional): Used for UHP-grade electrodes to enhance density and uniformity.

(3) Baking & Graphitization

Low-Temperature Baking (300-800°C): Removes volatiles and stabilizes the structure.

High-Temperature Graphitization (2500-3000°C): Conducted in Acheson furnaces or continuous graphitization furnaces to transform carbon into high-purity graphite, reducing resistivity.

(4) Machining

Turning: CNC lathes precision-machine the outer diameter and ends (±0.1mm tolerance).

Threading: Specialized milling/CNC machines cut 3/4-taper or 1/5-taper threads for secure connections.

(5) Surface Treatment

Anti-Oxidation Coating (Optional): Al-Si or phosphate coatings applied to resist high-temperature oxidation.

Quality Control: Ultrasonic testing (UT), resistivity checks, and flexural strength tests ensure compliance.

(1) Steelmaking

Electric Arc Furnaces (EAF): Ideal for HP/UHP steelmaking in medium-to-large furnaces (200-300mm electrodes).

Ladle Furnaces (LF): Used for secondary steel refining to improve purity.

(2) Non-Ferrous Metal Smelting

Copper/Aluminum/Zinc Alloys: Serves as conductive electrodes in induction/submerged arc furnaces, resistant to molten metal corrosion.

(3) Industrial Silicon & Ferroalloys

Submerged Arc Furnaces (SAF): Produces silicon metal, ferrosilicon, ferromanganese, and ferrochrome under high current density (20-30 A/cm²).

(4) Specialty Materials

Calcium Carbide (CaC₂) Production: Key conductive component in high-temperature furnaces.

Yellow Phosphorus, Corundum, Boron Carbide: Suitable for high-temperature chemical reactors.

(5) Other Industrial Uses

Graphitization Furnace Heating Elements: Processes carbon materials.

Lab High-Temperature Furnaces: Research-grade applications (e.g., CVD reactors, sintering furnaces).

✅ High Current Capacity – Ultra-low resistivity (≤6 μΩ·m for UHP), ideal for high-power furnaces.
✅ Oxidation Resistance – Graphitization + coatings extend service life.
✅ Precision Machining – High-accuracy threads ensure stable connections and reduce wear.
✅ Custom Solutions – Tailored lengths, threads, and coatings available.