Industrialized production method for rare earth metals or alloys

A technology for rare earth metals and production methods, applied in the electrolysis process, electrolysis components, etc., can solve the problems of inability to accurately control the amount of materials required by the electrolytic cell, inability to supply on demand, and unstable industrial production, and achieve accurate control of real-time raw materials. The effect of consumption, reduction of workload, and improvement of the total qualified rate of products

Active Publication Date: 2019-03-19
QIANDONG RARE EARTH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] This application overcomes the problem that the existing feeding method in this industry cannot accurately control the amount of materials required in the electrolytic cell for a long time, and cannot supply on demand, which seriously affects the quality of the product, leads to the instability of industrial production, and increases the production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] During the continuous electrolytic production of praseodymium-neodymium alloy, after the previous furnace metal is cooled and peeled off, the weight of the previous furnace metal collected by the weighing system is 7.4kg, and the control system is based on the calculation formula. =8.36 (coefficient value is 1.13), the raw material is mixed with praseodymium neodymium oxide, praseodymium neodymium fluoride and lithium fluoride during production, the ratio of praseodymium neodymium oxide: praseodymium neodymium fluoride: lithium fluoride=100:7:0.6, Therefore, the material used in this furnace = 8.36 / (100 / 107.6) = 9.00kg, the automatic feeder is evenly fed according to the amount of material used in the furnace calculated by the control system, and the process is stirred once every 10 minutes, and it is released from the furnace to obtain praseodymium and neodymium products. This is a production process of one furnace of metal in one feeding process, and the entire product...

Embodiment 2

[0034] During the continuous electrolytic production of metal neodymium, after the last metal is cooled and stripped, the weighing system collects the weight of the previous metal as 6.5kg, and the control system uses the calculation formula to accurately add the amount of neodymium oxide to this furnace = 6.5 × 1.12 = 7.28 (The value of the coefficient is 1.12). The automatic feeding machine calculates according to the control system that the furnace needs to use the neodymium oxide material to feed evenly. During the process, it is stirred once every 5 minutes, and the metal neodymium is released from the furnace. The production process, such a cycle completes the entire production process. The shift production of neodymium metal is 55.2kg (8 hours), the power consumption per kilogram of product is 7.3 degrees, and the pass rate C<300ppm once a month accounts for 96%

Embodiment 3

[0036] During the continuous electrolytic production of metal lanthanum, after the metal in the previous furnace is cooled and stripped, the manual weighing is 6.2kg. According to the calculation formula, the amount of lanthanum oxide that needs to be accurately added to this furnace = 6.2 × 1.17 = 7.25 (the value of the coefficient is 1.17). Add the calculated amount of materials into the furnace evenly, and once every 6 minutes in the process, the metal lanthanum is released from the furnace. This is a production process of adding materials and discharging from the furnace, and the entire production process is completed in this way. The shift production of metal lanthanum is 51.5kg (8 hours), the power consumption per kilogram of product is 6.8 degrees, and the pass rate once a month C<300ppm accounts for 90%

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Abstract

The invention relates to a method for producing rare earth metals or alloys. The weight of a furnace discharge product of the last furnace is precisely collected through a weighing system and transmitted to a control system, the control system calculates the precise feeding amount of the current furnace according to the weight of the furnace discharge product of the last furnace and instructs a feeding system to conduct continuous and uniform feeding, the steps are continuously and circularly conducted, precise feeding can be achieved according to the electrolysis need of each furnace, and therare earth metals or alloys with the stable product quality are obtained through electrolysis. According to the method, not only is the labor intensity of workers reduced, but also the product quality is improved, and production is stabilized; precise feeding in the rare earth electrolysis process is really achieved, and feeding is conducted as needed; and the method is simple and low in maintenance rate in the operation and implementation process, the production efficiency is greatly improved, the production cost is greatly reduced, and a solid foundation is laid for achievement of industrialization and informatization of industries.

Description

technical field [0001] The application of the present invention belongs to the field of rare earth metallurgy, and specifically relates to an industrialized production method of rare earth electrolysis. Background technique [0002] During the electrolysis process of the rare earth fluoride molten salt electrolysis system, due to the volatilization and leakage of the molten salt, the participation of fluoride in the electrolysis and other reasons, the electrolyte will be lost and the proportion will be changed. When the amount of molten salt is reduced, it will lead to lower output and higher cost, and when the fluoride content is lower or higher, it will lead to lower product quality and higher production cost. Therefore, it is very important to ensure the stability of the electrolyte system. [0003] In the existing electrolysis process, the electrolyte, rare earth fluoride and lithium fluoride are added separately. Since the melting point of lithium fluoride is lower tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/34C25C3/36C25C7/06
CPCC25C3/34C25C3/36C25C7/06
Inventor 龚斌章立志郭雪锋肖宗元钟延东李孝璋郭荣敏詹彩霞
Owner QIANDONG RARE EARTH GRP
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