Molten salt electroforming preparation method of rhenium

The invention discloses a molten salt electroforming preparation method of rhenium. The method comprises the following steps: S1, molten salt chlorination: under protection of inert gas, heating a molten salt medium to a molten state, adding K2ReCl6 to obtain molten salt containing K2ReCl6, introducing chlorine into the molten salt containing K2ReCl6 for chlorination, and cooling the molten salt to obtain the chloridized molten salt; and S2, electroforming: under protection of inert gas, heating the chloridized molten salt in S1 to the molten state, immersing a core mold into the chloridized molten salt in the molten state, and performing electrifying to carry out electroforming to obtain a rhenium metal casting on the surface of the core mold by taking the chloridized molten salt in the molten state as an electrolyte, the core mold as a cathode and an inert electrode carrying rhenium as an anode. The preparation method disclosed by the invention is low in cost and high in efficiency and can prepare the rheni