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Method for electrolysis of molten salt, electrolytic cell, and process for producing ti using said method

A technology of molten salt electrolysis and molten salt, which is applied in the manufacture of Ti and the field of electrolytic cells, can solve the problems of high price and achieve the effect of high-efficiency manufacturing

Inactive Publication Date: 2008-08-20
OSAKA TITANIUM TECHNOLOGIES
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Problems solved by technology

However, in this method, it is necessary to use expensive high-purity TiO 2

Method used

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  • Method for electrolysis of molten salt, electrolytic cell, and process for producing ti using said method
  • Method for electrolysis of molten salt, electrolytic cell, and process for producing ti using said method
  • Method for electrolysis of molten salt, electrolytic cell, and process for producing ti using said method

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Embodiment Construction

[0029] The molten salt electrolysis method of the present invention, the electrolytic cell, and the method for producing Ti to which the method is applied will be described in detail below with reference to the accompanying drawings. Also, in the molten salt electrolysis method of the present invention, the metal mist forms the metal in reducing TiCl 4 It also functions when Ti is formed, so the case where Ca is the metal mist forming metal will be described below.

[0030] FIG. 1 is a cross-sectional view showing a configuration example of a main part of an electrolytic cell used for carrying out the molten salt electrolysis method of the present invention.

[0031] The electrolytic cell 1 has: keep the CaCl 2 A pipe (cylindrical)-shaped electrolytic cell container 1a long in one direction for molten salt; a cylindrical anode 2 and a columnar negative electrode 3 arranged in the container 1a along the longitudinal direction of the electrolytic cell container 1a, A molten sa...

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Abstract

The present invention provides a method for electrolyzing molten salt that can enhance the concentration of metal-fog forming metal in the molten salt by carrying out the electrolysis under conditions that the molten salt containing the chloride of metal-fog forming metal is supplied from one end of an electrolytic cell to a space between an anode and a cathode in a continuous or intermittent manner to provide a flow rate in one direction to the molten salt in the vicinity of the surface of the cathode and thus to allow the molten salt to flow in one direction in the vicinity of the surface of the cathode. According to the present invention, while high current efficiency is maintained, only the molten salt enriched with metal-fog forming metal such as Ca can be effectively taken out. Further, this method can easily be carried out by using the electrolytic cell according to the present invention. Furthermore, the application of the method for electrolyzing molten salt according to the present invention to the production of Ti by Ca reduction can realize the production of metallic Ti with high efficiency. Thus, the method for electrolyzing molten salt, the electrolytic cell, and the process for producing Ti, each according to the present invention, can be effectively utilized in the production of Ti by Ca reduction.

Description

technical field [0001] The present invention relates to chlorides of metal mist forming metals (e.g. Ca, Li, Na, Al, etc.), in particular electrolysis containing CaCl 2 A molten salt electrolysis method capable of obtaining a molten salt having an increased Ca concentration, an electrolytic cell used therefor, and a method for producing Ti using the method. Background technique [0002] Reduction of TiCl by Mg in an industrial process for metallic Ti 4 The reduction method (kroll method) is a general method. In this reduction method, metal Ti is produced through a reduction step-vacuum separation step. In the reduction process, the liquid TiCl supplied from above in the reaction vessel 4 Molten Mg is reduced to generate particulate metal Ti, which is gradually precipitated downward to obtain spongy metal Ti. In the vacuum separation process, unreacted Mg and by-product MgCl are removed from the spongy metal Ti in the reaction vessel 2 . [0003] By the reduction method...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/02C22B34/12
CPCC22B34/1268C22B34/129C22B5/04C25C3/02C25C7/005
Inventor 小笠原忠司山口诚上西彻堀雅彦竹村和夫岳下胜则
Owner OSAKA TITANIUM TECHNOLOGIES
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