Core Requirements for DC Power Supplies in Rare Earth Smelting

• Current Range: 100 amperes to 10,000 amperes (3 kA–20 kA is common for electrolytic cells);
• Voltage Range: 0–20 V (electrolysis), 20–150 V (electrodeposition, environmentally friendly electrolysis);
• Accuracy: ±0.5% for regulated current, ±1% for regulated voltage;
• Ripple: ≤5% for molten salt electrolysis, ≤2% for electrodeposition;
• Efficiency and Energy Consumption: 8,000–12,000 kWh per ton of metal, with significant energy-saving potential;
• Reliability: Continuous operation of 330 days/year, high-temperature resistance, corrosion resistance, and immunity to grid fluctuations.

Rectifier Applications in Molten Salt Electrolysis

Chloride Molten Salt Electrolysis

Chloride molten salt electrolytic cells require voltages of 8–12 V and currents of 6 kA–20 kA, with a ripple requirement of ≤5%. Thyristor rectifiers are recommended, as they are mature and short-circuit resistant.

Oxide-Fluoride Molten Salt Electrolysis

Oxide-Fluoride Molten Salt Electrolysis Cell Voltage: 10-15 V, Current: 8 kA-15 kA, Ripple Requirements: ≤3%. An IGBT high-frequency switching power supply or synchronous rectification high-frequency power supply is recommended.

Extraction Electrodeposition

Description: Extraction Electrodeposition Cell Voltage: 30-60 V, Current: 500 A-3 kA, Ripple Requirements: ≤2%. Periodic reverse pulse function is required. A high-frequency switching power supply + pulse module is recommended.

Wastewater Electrocoagulation

Wastewater Electrocoagulation Cell Voltage: 20-30 V, Current: 100 A-1 kA, Timed reverse pulse function is required. A modular high-frequency switching power supply is recommended.

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