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Rare earth metal siphoning device and method for rare earth electrolytic cell

A technology of rare earth metals and electrolytic cells, which is applied in the direction of electrolysis process, electrolysis components, cells, etc., can solve the problems of easy failure of equipment, high labor intensity of operators, and surface oxidation of rare earth metals, so as to prevent oxidation, increase labor procedures, Effect of Reducing Secondary Loss

Inactive Publication Date: 2021-01-01
中铝郑州有色金属研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method takes a long time to bake, the labor intensity of the operator is high, and the dependence on skilled workers is large, so it is impossible to realize automatic production
[0003] In recent years, the method of extracting rare earth metals using the principle of siphon has appeared, but the existing siphon device has the problems of equipment failure, surface oxidation of rare earth metal after ingot casting, and the purity of the extracted rare earth metal after casting ingot is not high enough. This makes the rare earth metals out of the furnace slow and inefficient

Method used

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  • Rare earth metal siphoning device and method for rare earth electrolytic cell
  • Rare earth metal siphoning device and method for rare earth electrolytic cell
  • Rare earth metal siphoning device and method for rare earth electrolytic cell

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Embodiment 1

[0031] The embodiment of the present invention provides a device for siphoning rare earth metal in a rare earth electrolytic cell, which is used in conjunction with any existing rare earth electrolytic cell. The overall inventive concept is as follows:

[0032] The device includes a siphon casting bag and vacuum equipment for providing a vacuum environment to the siphon casting bag. The siphon casting bag includes a bag body, a siphon tube, a weighing device and a casting mold. One end of the siphon tube communicates with the bag body, and the other end of the siphon tube is used for extending The rare earth metal is siphoned into the rare earth electrolytic cell, the weighing equipment and the casting mold are both arranged in the package body, and the casting mold is arranged on the weighing equipment. Compared with the prior art, the present invention sets the casting mold inside the siphon casting ladle, which has both the siphon function and the ingot casting function, avo...

Embodiment 2

[0042] This embodiment provides a method for siphoning rare earth metals, which is implemented based on the device for siphoning rare earth metals in a rare earth electrolytic cell in the above-mentioned embodiment 1, and specifically includes the following steps:

[0043] (1) The siphon tube 5 is preheated by the preheating device 8, and the temperature of the siphon tube 5 is controlled to be 650°C to 900°C, such as 650°C, 680°C, 715°C, 770°C, 825°C, 850°C, 860°C, 865°C °C, 870 °C, 877 °C, 882 °C, 885 °C, 900 °C, etc., the temperature of the siphon tube is preferably 50 °C to 200 °C lower than the melting point of the rare earth metal; the vacuum device 2 provides a vacuum environment to the siphon casting ladle 1 to control the siphon casting ladle 1. The vacuum inside is 0.1Pa~100Pa, such as 0.1Pa, 0.2Pa, 0.35Pa, 0.5Pa, 0.65Pa, 0.7Pa, 0.77Pa, 0.85Pa, 1Pa, 10Pa, 25Pa, 42Pa, 60Pa, 80Pa, 95Pa, etc. , preferably 0.1Pa~1Pa; extend the siphon tube 5 into the rare earth metal liq...

Embodiment 3

[0046] This embodiment provides a method for siphoning rare earth metals, which is implemented based on the device for siphoning rare earth metals in a rare earth electrolytic cell in the above-mentioned embodiment 1. The rare earth metal is specifically a praseodymium-neodymium alloy with a melting point of 992°C and a temperature of the melt in the furnace chamber of the electrolytic cell 1050°C. The siphon rare earth metal method specifically includes the following steps:

[0047] (1) Preheat the siphon tube 5 by the preheating device 8, and control the temperature of the siphon tube 5 to be 800°C to 850°C; provide a vacuum environment to the siphon casting ladle 1 through the vacuum equipment 2, and control the vacuum degree inside the siphon casting ladle 1 to be 0.1Pa~1Pa; extend the siphon tube 5 into the rare earth metal liquid below the electrolyte liquid level in the rare earth electrolytic cell 12, and start to siphon the rare earth metal, and the rare earth metal i...

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PUM

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Abstract

The invention discloses a rare earth metal siphoning device and method for a rare earth electrolytic cell. The device comprises a siphon casting ladle and vacuum equipment used for providing a vacuumenvironment for the siphon casting ladle, the siphon casting ladle comprises a ladle body, a siphon, weighing equipment and a casting mold, one end of the siphon is in communication with the ladle body, the other end of the siphon is used for extending into the rare earth electrolytic cell to siphon rare earth metal, the weighing equipment and the casting mold are both arranged in the ladle body,and the casting mold is arranged on the weighing equipment. Due to the fact that a weight sensor is installed below the siphon casting ladle, accurate siphon metal siphoning can be achieved accordingto the cell condition, the technical problem that a traditional rare earth siphon device can only roughly control the metal siphoning amount through an observation hole is solved, heat balance of theelectrolytic cell can be effectively adjusted through the metal siphoning amount, and when the cell temperature is too high or too low, the heat dissipation condition of an electrolytic cell system can be changed through the metal siphoning amount, and stable operation of the electrolytic cell is kept.

Description

technical field [0001] The application belongs to the technical field of rare earth electrolysis, and in particular relates to a device and method for siphoning rare earth metals in a rare earth electrolytic cell. Background technique [0002] The extraction of rare earth metals is an important process in the production process of rare earth electrolysis. At present, the main way for rare earth metals to come out of the furnace is to manually use a spoon to scoop out the rare earth metals from the container at the bottom of the electrolytic tank, and then pour them into a casting mold to cast them into ingots. This method takes a long time to bake, the labor intensity of the operator is high, and the dependence on skilled workers is large, so it cannot realize automatic production. [0003] In recent years, the method of extracting rare earth metals using the principle of siphon has appeared, but the existing siphon device has the problems of equipment failure, surface oxid...

Claims

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Application Information

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IPC IPC(8): C25C7/06C25C3/34
CPCC25C7/06C25C7/005C25C3/34
Inventor 胡谷华史志荣张亚楠杨杰柴登鹏刘彦辉李冬生梁利辉白卫国张旭贵刘丹
Owner 中铝郑州有色金属研究院有限公司
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