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Electrolytic cell in electro-deoxidization metallurgy process

A technology of electro-deoxidation metallurgy and electrolyzer, applied in the direction of electrolysis process, electrolysis components, diaphragm, etc., can solve the problems of low product quality, large proportion of side reactions, low current efficiency, etc., achieve large production capacity, short production cycle, The effect of preventing side effects

Inactive Publication Date: 2011-08-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is a problem that the proportion of side reactions is too large in the process of preparing titanium metal by FFC electrodeoxidation method, which leads to long reaction time, low current efficiency and low product quality in the electrolytic production process.

Method used

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  • Electrolytic cell in electro-deoxidization metallurgy process
  • Electrolytic cell in electro-deoxidization metallurgy process
  • Electrolytic cell in electro-deoxidization metallurgy process

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] The cathode of the electrolytic cell adopts titanium oxide cathode rod, which is formed by mixing and sintering titanium dioxide fine powder and PVA binder in proportion. The oxide mass of each cathode rod is about 100g. Group. In the anode area, three rotating graphite anodes are connected in parallel in a manner corresponding to the cathode as electrolysis anodes. The distance between the cathode and the anode is 200mm, and the anode rod speed is set at 120rpm. Remove partitions. Using CaCl 2 molten salt, molten salt CaCl 2 The depth is 140mm, the temperature is controlled at 950°C, the flow rate of protective gas argon is set at 5L / min, the voltage of the electrolytic cell is 3.1V, and the electrolysis time is 36h. For the overall electrolysis process, see image 3 .

[0020] The shape of the product is basically unchanged, the density is high, the color is gray-black, and there is gray layering in the center part. After testing, it is mainly intermediate produc...

example 2

[0022] The cathode of the electrolytic cell adopts titanium oxide cathode rod, which is formed by mixing and sintering titanium dioxide fine powder and PVA binder in proportion. The oxide mass of each cathode rod is about 100g. Group. In the anode area, three rotating graphite anodes are connected in parallel in a manner corresponding to the cathode as electrolysis anodes. The distance between the cathode and the anode is 200mm, and the anode rod speed is set at 180rpm. The separator is made of Al 2 o 3 The material has a porosity of 55%, an apparent porosity of 30%, a thickness of 2mm, and a height of 300mm. The overall configuration of the electrolytic cell is as follows: figure 1 and figure 2 shown. CaCl is used in the electrolytic cell 2 molten salt, molten salt CaCl 2 The depth is 140mm, the temperature is controlled at 950°C, the flow rate of protective gas argon is set at 5L / min, the voltage of the electrolytic cell is 3.1V, and the electrolysis time is 36h. Fo...

example 3

[0025] The cathode of the electrolytic cell adopts titanium oxide cathode rod, which is formed by mixing and sintering titanium dioxide fine powder and PVA binder in proportion. The oxide mass of each cathode rod is about 100g. Group. In the anode area, three rotating graphite anodes are connected in parallel in a manner corresponding to the cathode as electrolytic anodes. The distance between the cathode and the anode is 200mm, and the anode rod speed is set at 120rpm. The separator is made of MgO material, the porosity is 50%, the apparent porosity is 15%, the thickness is 5mm, and the height is 300mm. The overall configuration of the electrolytic cell is as follows: figure 1 and figure 2 shown. CaCl is used in the electrolytic cell 2 molten salt, molten salt CaCl 2 The control depth is 140mm, the temperature is controlled at 950°C, the protective gas argon flow rate is set at 5L / min, the voltage of the electrolytic cell is 3.1V, and the electrolysis time is 28h. For ...

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Abstract

The invention discloses an electrolytic cell in electro-deoxidization metallurgy process, which is divided into a negative electrode region and a positive electrode region, which have the effect of isolating the flow of fused salts while achieving free exchange of ions, thus suppressing the occurrence of side reaction of positive and negative electrode products; the positive electrode in the electrolytic cell is rotated to accelerate the deoxidization speed and simultaneously, the emission of tail gas in the positive electrode region is quickened up in a manner of oriented-circulating protective gas stream in order to avoid overhigh content of the tail gas within the electrolytic cell; the electrodes of the electrolytic cell are changed into be arrayed in parallel, which breaks the limitation of traditional single electrode, the negative electrode and the positive electrode correspondingly form counter electrodes so as to polarize the electro-deoxidization task of the electrodes. The parallel-type electrodes can also adjust the array number of the counter electrodes according to requirement so as to change production ability without more improvements on equipment and production conditions, and to guarantee product quality as well. The electrolytic cell according to the invention has large production ability and short production period and is capable of realizing semi-continuous product.

Description

technical field [0001] The invention relates to the design of an electrolytic cell for preparing metal simple substance or alloy by electrochemical deoxidation of metal oxides, in particular to the process design of an electrolytic cell for electro-deoxidation metallurgical method. Background technique [0002] The method commonly used in the production of sponge titanium industry in the world is the Kroll process. The Kroll method mainly uses metal Mg to reduce TiCl 4 Process - Vacuum separation process produces metal titanium, which can produce high-purity titanium metal. However, due to the long thermal reduction process, complicated procedures, and non-continuous production, the production cost of titanium remains high, and the environmental pollution in the production process greatly restricts the wide application of titanium. Although many researchers have tried to improve the Kroll process, the results show that some technical improvements cannot change the high cos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C7/04C25C3/28
Inventor 郭占成蔡卓飞王中磊叶伟
Owner UNIV OF SCI & TECH BEIJING
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