Industrial-Grade Rare Earth Electrolysis Rectifier (24V/4000A) for Molten Salt Smelting

Engineered for the most demanding metallurgical processes, this 24V 4000A air-cooled DC power supply is the definitive solution for rare earth molten salt electrolysis. Unlike standard conversion equipment, this unit is purpose-built to deliver precise current direction and magnitude control, ensuring consistent fluoride system temperatures and uniform metal deposition. As a trusted industrial high frequency rectifier factory, we prioritize electrochemical performance over simple power output, offering a 0.1% current stabilization rate that directly correlates to reduced rare earth oxide consumption and higher metal yield per shift.
PART 1 KEY FEATURES & ENGINEERING HIGHLIGHTS
High-Frequency IGBT Topology: Operating at 20kHz switching frequency, this system achieves up to 92% efficiency, significantly reducing cooling costs in high-ambient smelting halls. The IGBT modules feature direct liquid cooling via deionized water loops (external chiller optional) to maintain junction temperatures below 85°C even at full load.
Constant Current / Constant Voltage (CC/CV) Dual-Loop Control: With a response time of <1ms, the rectifier automatically compensates for electrode gap fluctuations and bath resistance changes common in cerium and lanthanum electrolysis. The CC mode ensures steady 4000A throughput while CV mode protects the graphite anode from thermal shock during start-up.
Robust Output Characteristics: Capable of continuous 100% full-load operation at 40°C ambient, this unit tolerates dirty power grids with an input voltage fluctuation range of ±15%. The DC output ripple is suppressed to less than 3% RMS, which is critical for preventing magnet contamination in downstream processing.
Flexible Communication Interface: Integrates seamlessly into existing distributed control systems (DCS) via standard RS485 Modbus RTU protocol. The built-in WEB server enables remote monitoring from any control room terminal, allowing operators to track real-time kWh consumption per kilogram of rare earth produced.
PART 2 TECHNICAL SPECIFICATIONS TABLE

PART 3 ADVANCED BUILT-IN PROTECTION SYSTEMS
The molten salt process creates hazardous conditions for electronics, including conductive dust, airborne fluorine compounds, and thermal radiation. This rectifier is shielded against all such threats. The power stage is completely isolated with a sealed busbar chamber, preventing electrolytic vapor condensation from shorting DC terminals. Software interlocks constantly monitor phase loss and input surge, de-rating output automatically rather than tripping breakers. An embedded electrolytic capacitor health monitor predicts end-of-life conditions 2000 hours in advance, preventing unexpected downtime. For upset conditions, the system features a self-cleaning gas discharge tube on the DC side that safely redirects transient voltage spikes from reversing motors or contactor arcs.
PART 4 TARGET INDUSTRIAL APPLICATIONS
This high-density power supply is engineered primarily for electrolytic preparation of mischmetal, neodymium, and dysprosium alloys. However, its exceptional dynamic response makes it suitable for related electrometallurgical duties:
Rare Earth Fluoride Electrolysis: Provides the 2000-4000 A current density required for maintaining the temperature gradient between the molten oxide layer and metal pool.
Anode Effect Control: When cell voltage spikes above 15V due to anode effect, the rectifier switches to a low-current pulsing mode (0.2Hz, 10% duty cycle) that suppresses back-EMF without quenching the cell.
Magnesium & Aluminum Scrap Refining: The high-current loop response enables efficient transfer of aluminum ions through molten salt electrolytes in secondary smelting operations.
Academic R&D: For research institutions studying new molten salt systems, the customizable waveform generator permits simulation of different current modulation patterns.
PART 5 CUSTOMIZATION AND TAILORED ENGINEERING SERVICES
Every smelting operation presents unique bath chemistry and cell geometry constraints. We move beyond off-the-shelf solutions, leveraging our status as a certified IGBT rectifier manufacturer to deliver bespoke configurations. Our in-house engineering team can adjust output ranges between 1V and 1000V DC, and 1A to 100,000A, while maintaining the exact square-wave or pulse profile your process requires.
Process Timer: Configure automated diurnal cycles to match shift schedules, including scheduled reverse current steps to strip solid electrolyte buildup from refractory linings.
Multi-Stage Profile Control: Program up to 32 distinct current ramps and soak periods for different phases of the batch (e.g., pre-electrolysis conditioning vs. metal drawing).
Ampere-Minute Integrator: Precisely measure the total charge passed through the cell, allowing you to calculate current efficiency and predict metal output to within 0.1 kg per batch.
Automatic Reverse Polarity: Adjustable from 1 to 999 seconds for cleaning anode films in oxide reduction processes.
Soft-Start Option: Limits inrush current to protect ceramic crucibles from thermal cracking during initial power-up. Interfaces include isolated 4-20mA analog control signals for external PLC coordination, and high-speed Pulse Functions (1-3000Hz adjustable) for specialized alloy deposition. This is the definitive custom current voltage rectifier for scientific researchers and large-scale producers alike.
REQUEST A QUOTE
Exact heavy-duty DC power supply price is based on your required protection class, load characteristics, and I/O configuration. Our global after-sales network ensures replacement components are shipped within 48 hours to any industrial zone. Contact our engineering department for a detailed load study and quotation tailored to your smelter’s layout.