Device and method for metal preparation by electro-reduction of molten salt

A method for metal preparation by electro-reduction of molten salt implemented by a device for metal preparation by electro-reduction of molten salt, wherein the device includes a reactor, an electrical conductor, a power supply, a gas charging and discharging mechanism and a closure mechanism;

• the reactor is a barrel body with a conductive base plate and an insulated peripheral wall and opens at one end, a barrel cavity of the reactor is configured to lay down a reactant and a molten salt substance in sequence from bottom to top;
• the electrical conductor is configured to be inserted into the molten salt substance after melting;
• the reactor and the electrical conductor are disposed inside the closure mechanism, and the power supply is disposed outside the closure mechanism;
• a positive pole of the power supply is electrically connected to the electrical conductor, and a negative pole of the power supply is electrically connected to the conductive base plate;
• the gas charging and discharging mechanism is configured to continuously charge a protective gas into the reactor while removing an exhaust gas;
• and
• the method includes:
• laying the reactant and the molten salt substance in sequence from bottom to top in the barrel cavity of the reactor;
• heating the reactor until the molten salt substance melt and then inserting the electrical conductor into the molten salt substance;
• continuously charging the protective gas into the reactor through the gas charging and discharging mechanism while removing the exhaust gas, and switching on the power supply to perform a molten salt electro-reduction reaction;
• when the molten salt electro-reduction reaction in the barrel cavity is finished, disconnecting the power supply, pouring out the molten salt substance in an upper portion of the barrel cavity, and removing a retained substance in a lower portion of the barrel cavity;
• and
• obtaining a metal by the retained substance.