A connecting pipe, a titanium sponge manufacturing apparatus comprising said connecting pipe, a method for producing sponge titanium using said apparatus and a sponge titanium manufactured by said method

摘要

At least one reaction vessel which is a connecting tube which is long in life without producing a short circuit between the lead wire and the outer tube and disconnection of the lead wire in the manufacturing and refining process of the sponge titanium by the Kroll process, And at least one recovery container for condensing and recovering magnesium and magnesium chloride separated in the reaction vessel, wherein the connecting pipe has a double structure comprising an inner pipe and an outer pipe At least one heating unit provided between the inner pipe and the outer pipe, two or more pairs of lead terminals penetrating through the outer pipe and used for electrical connection to the outside of the connecting pipe, An insulator for sealing the lead terminal, a lead wire for electrically connecting the heating unit and the lead terminal, and a stress absorbing portion provided on the outer tube, wherein the stress absorbing portion includes: Connecting pipe, characterized in that provided between the serial lead terminals.