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Electrolytic cell and electrolytic process for preparing rare earth metals and their alloys

A rare-earth metal and electrolytic cell technology, which is applied in photography technology, photography auxiliary technology, instruments, etc., can solve the problems of high energy consumption and high current density, and achieve the effect of simple cell structure, low current density and reduced energy consumption

Active Publication Date: 2016-12-28
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The present invention aims to provide an electrolytic cell and an electrolytic process for preparing rare earth metals and their alloys, so as to solve the technical problems of relatively high current density and high energy consumption in the electrolytic cell in the prior art

Method used

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  • Electrolytic cell and electrolytic process for preparing rare earth metals and their alloys
  • Electrolytic cell and electrolytic process for preparing rare earth metals and their alloys
  • Electrolytic cell and electrolytic process for preparing rare earth metals and their alloys

Examples

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Effect test

Embodiment 1

[0052] Using high-power graphite electrodes to process rectangular graphite grooves, the external dimensions of the graphite grooves are 390mm (length) × 370mm (width) × 400mm (height), and the internal dimensions are 290mm (length) × 270mm (width) × 300mm (height). A groove of 250mm (length) × 60mm (width) × 70mm (depth) is processed in the center of the bottom of the graphite tank along the length of the tank, and a groove with an external size of 250mm (length) × 60mm (width) × 100mm ( height) of a tungsten crucible (thickness 10mm), two 75mm (width) × 10mm (thick) tungsten plates are placed as cathodes perpendicular to the center of the crucible and 4cm away from the upper edge of the crucible. The distance between the centers of the two cathode plates is about 11cm. Protrude out of the graphite tank and connect to the negative pole of the DC power supply. A set of anodes is respectively arranged on both sides of the tungsten plate 6 cm away from the side of the tungsten pl...

Embodiment 2

[0055] The size of the two cathode tungsten plates used in the electrolytic cell is 48mm (width)×10mm (thickness), and the distance between the anode unit group and the cathode unit group is 5cm. The graphite plate and the tungsten plate are 14cm away from the bottom surface of the graphite tank, and the other configurations and parameter control of the electrolytic tank are the same as in Example 1.

[0056] Fill the graphite tank with a ratio of LaF 3 :LiF=85:15 electrolyte molten salt, turn on the power supply to start electrolysis, control the bath temperature at 1000-1060°C, the electrolysis current intensity is 1000A, the electrolysis cell voltage is controlled at 6V, and the cathode current density is about 2.5A / cm at this time 2 , the anode current density is about 0.84A / cm 2 , add La at a constant speed of about 1.77kg per hour 2 o 3 , electrolyzed for 3 hours, a total of La 2 o 3 5.32kg, LaF 3 0.24kg, the output of metal lanthanum is about 4.44kg, the electroly...

Embodiment 3

[0058] The size of the two cathode tungsten plates used in the electrolytic cell is 30mm (width) × 10mm (thickness), and the distance between the anode unit group and the cathode unit group is 8cm. The graphite plate and the tungsten plate are 10 cm away from the bottom surface of the graphite tank, and other configurations and parameter control of the electrolytic tank are the same as in Example 1.

[0059] Fill the graphite tank with a ratio of LaF 3 :LiF=85:15 electrolyte molten salt, turn on the power supply to start electrolysis, the bath temperature is controlled at 1080-1130°C, the electrolysis current intensity is 1000A, the electrolysis cell voltage is controlled at 6.3V, and the cathode current density is about 4A / cm at this time 2 , the anode current density is about 0.84A / cm 2 , add La at a constant speed of about 1.75kg per hour 2 o 3 , electrolyzed for 3 hours, a total of La 2 o 3 5.24kg, LaF 3 0.26kg, the output of metal lanthanum is about 4.38kg, the elec...

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Abstract

The invention discloses an electrolytic cell for preparing rare earth metals and alloys thereof. The electrolytic cell includes an electrolytic cell body and an anode and a cathode arranged in the electrolytic cell body, the anode is composed of two or more anode unit groups, the cathode is composed of two or more cathode unit groups, and the anode unit The groups are arranged alternately with the cathode unit groups. Applying the technical solution of the present invention, since the anode unit groups and the cathode unit groups are alternately arranged in parallel, the cathode and anode current densities of the electrolytic cell of the present invention are small, especially the cathode current density is small, which reduces the energy consumption of the electrolytic cell . In addition, the cell structure of the present invention is simple, and the electrolytic capacity of the electrolytic cell is easy to expand: compared with the prior art, the electrolytic cell of the present invention has no center layout feature, and the cathode and anode are alternately arranged in parallel, and the cell type is easy to be enlarged, and the electrolytic capacity of the electrolytic cell of the present invention It can be expanded to tens of thousands of amperes or even hundreds of thousands of amperes.

Description

technical field [0001] The invention relates to the technical field of rare earth pyrometallurgy, in particular to an electrolytic cell and an electrolytic process for preparing rare earth metals and their alloys. Background technique [0002] The output of rare earth metals and their alloys in my country accounts for more than 90% of the world's output. The molten salt electrolysis method is the mainstream process for the production of light rare earth metals and medium and heavy rare earth alloys. Metal products are produced by molten salt electrolysis. At present, the mainstream tank type of domestic molten salt electrolysis industrial production is 6000-8000 amperes, and a few manufacturers have a single tank capacity of 10000 amperes. The 25,000 ampere electrolyzer type is only operated in individual enterprises due to the need for further improvement of economic and technical indicators. [0003] Chinese patent CN85100748A discloses a groove structure for continuous p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/22C25C3/36C25C7/00
Inventor 李宗安庞思明王志强陈德宏朱琼王祥生徐建林陈博雨周林徐立海赵斌
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG