Method for refining beryllium by molten salt electrolysis

A method for refining beryllium by molten salt electrolysis, comprising the following steps:

• (1) Constructing an electrochemical system:
• the electrolytic cell is divided into an anode chamber and a cathode chamber, wherein the anode chamber contains an anode molten salt electrolyte, a crude beryllium anode is inserted in the anode molten salt electrolyte, the cathode chamber contains a cathode molten salt electrolyte, a cathode is inserted in the cathode molten salt electrolyte, a liquid alloy is at the bottom of the inside of the electrolytic cell:
• the anode molten salt electrolyte and the cathode molten salt electrolyte are not in contact with each other but are connected via the liquid alloy at the bottom of the inside of the electrolytic cell;
• (2) Applying a current for electrolysis, the beryllium metal in the anode is oxidized to beryllium ions, the beryllium ions from the anode are moved into the anode molten salt electrolyte, the beryllium ions in the anode molten salt electrolyte are reduced to beryllium metal at the interface between the anode molten salt electrolyte and the liquid alloy, the beryllium metal at the interface between the anode molten salt electrolyte and the liquid alloy is dissolved into the liquid alloy, meanwhile the beryllium metal in the liquid alloy is oxidized to beryllium ions at the interface between the liquid alloy and the cathode molten salt electrolyte, the beryllium ions at the interface between the liquid alloy and the cathode molten salt electrolyte are moved into the cathode molten salt electrolyte, the beryllium ions in the cathode molten salt electrolyte are reduced to beryllium metal on the cathode surface.