Title:
METHOD FOR MANUFACTURING LOW-CHLORINE TITANIUM SPONGE
Document Type and Number:
WIPO Patent Application WO/2018/110617
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method for manufacturing titanium sponge, in which, when titanium sponge is manufactured by the Kroll process, the average chlorine concentration of the titanium sponge is reduced by reducing the chlorine concentration near peak sections of titanium sponge lumps. The present invention is a method for manufacturing titanium sponge, in which titanium sponge lumps are produced by supplying titanium tetrachloride onto molten magnesium in a reaction vessel according to the Kroll process, the method being characterized in that at least part of the titanium sponge to be produced is produced while supply of the titanium tetrachloride is continued for a duration t from the point of time at which metal magnesium on the surface of a reaction bath has depleted and low-grade titanium chlorides have begun to dissolve in magnesium chloride. When the total mass of titanium tetrachloride supplied into the reaction vessel is MTiC14 (tons), the duration t satisfies t ≤ 0.63 × MTiC14.
Inventors:
INOUE YOSUKE (JP)
YAMAGUCHI MASANORI (JP)
YAMAGUCHI MASANORI (JP)
Application Number:
PCT/JP2017/044808
Publication Date:
June 21, 2018
Filing Date:
December 14, 2017
Export Citation:
Assignee:
TOHO TITANIUM CO LTD (JP)
International Classes:
C22B34/12; C22B5/04
Other References:
KIYOSHI ET AL: "Morohology and formation mechanism of residual chlorine in titanium sponge produced in the kroll process", SHINGEN TO- SOZAI, vol. 112, no. 4, 27 January 2012 (2012-01-27), pages 251 - 256, XP055494763
Attorney, Agent or Firm:
MOEGI PATENT OFFICE (JP)
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