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Metal producing method and producing device by molten salt electrolysis

A molten salt electrolysis, molten salt technology, applied in the field of manufacturing equipment, manufacturing titanium metal, can solve problems such as difficulty, low recovery efficiency, increased cost, etc., to achieve the effect of inhibiting the reverse reaction

Inactive Publication Date: 2007-09-26
TOHO TITANIUM CO LTD +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in this method, a composite molten salt needs to be specially prepared, and the cost must also be considered
[0005] In addition, in any of the above-mentioned methods, there is a tendency for the metal calcium produced by molten salt electrolysis to reversely react with the chlorine gas by-produced by the electrolysis reaction to regenerate calcium chloride, which becomes a cause of a decrease in efficiency.
[0006] As mentioned above, in the conventional method, it is difficult to recover or concentrate metals such as metallic calcium as a single substance, and the recovery efficiency is low.
In addition, there is the problem of high cost even if it is possible
As a result, it becomes a cause of an increase in the cost of producing titanium

Method used

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  • Metal producing method and producing device by molten salt electrolysis
  • Metal producing method and producing device by molten salt electrolysis

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Embodiment

[0073] The molten salt electrolysis of calcium chloride was performed in the electrolytic cell shown in FIG. The temperature of the electrolytic bath composed of calcium chloride is kept at 850±5°C, and the ring-shaped cathode 4 is not particularly cooled, but is kept at 850±5°C.

[0074] Through the bath supply pipe 6, the raw material molten calcium chloride is continuously supplied to the inside of the cathode, and at the same time, the metal calcium concentration layer is drawn out of the system through a drawing pipe immersed outside the cathode. The metallic calcium extracted to the outside of the system is supplied to the reduction reaction of titanium oxide. On the other hand, the chlorine gas generated by the anode is supplied to the chlorination reaction of titanium ore. It is possible to produce metallic calcium equivalent to 80% of the theoretical weight calculated from the amount of electricity supplied to the anode and cathode.

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Abstract

The present invention provides a metal producing method by molten salt electrolysis carried out with calcium chloride molten salt filled in an electrolytic bath provided with an anode and a cathode, characterized in that either one electrode of the anode and the cathode is provided so as to surround the other electrode, the cathode is provided with at least one communication port to allow communication between an inner area surrounded by the cathode and an outer area, and molten salt is allowed to flow from one area, out of the inner area and the outer area, on the anode-provided side to the other area via the communication port.

Description

Technical field [0001] The present invention relates to the production of metals from metal chlorides, and in particular to a method and apparatus for producing metals including a method of producing metallic calcium by molten salt electrolysis and a method of producing metallic titanium using the metallic calcium. Background technique [0002] In the past, elemental metal titanium was manufactured by the Kroll method of reducing titanium tetrachloride with molten magnesium to obtain sponge titanium, and attempts were made to reduce manufacturing costs through various improvements. However, since the Kroll method is a batch process in which a series of operations are repeated discontinuously, its efficiency is restricted. [0003] In response to the above situation, a method of reducing titanium oxide with metallic calcium in molten salt to directly produce metallic titanium (for example, refer to Patent Documents 1 and 2) has been proposed to produce a reducing agent containing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/28C25C3/02
CPCC22B34/129C25C7/025C25C3/02C25C3/28
Inventor 山口雅宪小野有一小濑村晋西村荣二小笠原忠司山口诚堀雅彦上西彻
Owner TOHO TITANIUM CO LTD
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