Method for producing metal titanium

Patent metadata

Field	Value
Publication number	US-2023125127-A1
Application number	US-202218087718-A
Country	US
Kind code	A1
Filing date	Dec 22, 2022
Priority date	Jun 6, 2018
Publication date	Apr 27, 2023
Grant date	—

Abstract

A metal titanium production apparatus includes: a reductor that subjects titanium tetrachloride to a reduction process in presence of bismuth and magnesium to obtain a liquid alloy containing titanium and the bismuth; a segregator that subjects the liquid alloy to a segregation process to obtain a precipitate; and a distillator that subjects the precipitate to a distillation process to obtain metal titanium, and the distillator sets an atmosphere so as to preferentially vaporize the bismuth attached to the precipitate and then sets the atmosphere so as to vaporize the bismuth forming the precipitate.

First claim

1 - 9 . (canceled)

10 : A metal titanium production method, comprising:
a reduction step of subjecting titanium tetrachloride to a reduction process in presence of bismuth and magnesium to obtain a liquid alloy containing titanium and the bismuth; a segregation step of subjecting the liquid alloy to a segregation process to obtain a precipitate; and a distillation step of subjecting the precipitate to a distillation process to obtain metal titanium,
wherein
in the distillation step, an atmosphere around the precipitate is set so as to preferentially vaporize the bismuth attached to the precipitate and then is set so as to vaporize the bismuth forming the precipitate, and
in the distillation step,
the precipitate is heated at a first temperature such that a structure of titanium contained in the precipitate obtained through the segregation step is maintained and vaporization of bismuth from a surface of the precipitate is maintained by bismuth diffusing to the surface from an inner part of the precipitate so that the precipitate changes into a porous structure and that the melting point of the precipitate increases due to the vaporization of bismuth, and
thereafter the precipitate is heated at a second temperature such that the structure of titanium contained in the precipitate having an increased melting point is maintained, the second temperature being higher than the first temperature.

Assignees

• Univ Kyoto
• Ihi Corp

Inventors

• Uda Tetsuya
• Kunitomo Yoshinobu
• Kishimoto Akihiro
• Kumamoto Kazuhiro
• Sato Akihiro
• Dodo Yasushi
• Hashimoto Takuya
• Yoshimura Akihiko

Classifications

• Y02P10/20

  Recycling · CPC title

• C22B34/1277 Primary

  using other metals, e.g. Al, Si, Mn · CPC title

• C22B34/1295

  Refining, melting, remelting, working up of titanium · CPC title

• C22B34/1272 Primary

  reduction of titanium halides, e.g. Kroll process · CPC title

• C22B34/12 Primary

  Obtaining titanium {or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08} · CPC title