Method and equipment for continuous preparation of high-purity titanium by oxide melting electrolysis-vacuum rectification

Abstract

The invention relates to a method and equipment for continuous preparation of high-purity titanium by oxide melting electrolysis-vacuum rectification, belonging to the fields of electrochemical metallurgy and vacuum metallurgy. The process steps are as follows: add metal or alloy cathode and titanium-containing oxide slag electrolyte in the electrolytic furnace, use inert electrode or graphite as the anode; perform electrolysis under high temperature conditions, and send the titanium-containing alloy obtained by electrolysis into the rectification furnace for rectification , Separation of titanium and metal or alloy cathode; making the metal or alloy cathode return to the electrolytic furnace through evaporation to realize circulation. The entire operation process realizes the continuous preparation of high-purity titanium by controlling the rectification furnace and electrolytic furnace to realize oxide melting electrolysis-vacuum rectification. The invention meets the requirements of green metallurgy, utilizes the principles of electrochemical metallurgy and vacuum metallurgy, continuously and comprehensively recovers metallurgical secondary resources, and has the advantages of low energy consumption, simple operation, short process and the like.

Description

technical field

[0001] The invention relates to a method and equipment for continuous preparation of high-purity titanium by oxide melting electrolysis-vacuum rectification, belonging to the fields of electrochemical metallurgy and vacuum metallurgy. Background technique

[0002] Due to its high specific strength, corrosion resistance and good biocompatibility, titanium is considered as a future metal and is widely used in aerospace, petrochemical, nuclear power, ships, submarines and biomedicine. It accounts for about 0.42% in the earth's crust, which is 16 times the total amount of copper, nickel, lead, and zinc. However, most titanium-containing minerals are composite ores, which are difficult to directly smelt. At present, the Kroll method is the main industrial production method of titanium. While producing titanium, this method has high requirements for intermediates such as titanium tetrachloride and magnesium, and has strict requirements for the airtightness and pre...

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