An integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nanomaterials by arc plasma method

An arc plasma, rare earth metal technology, applied in the preparation/processing of rare earth metal oxides/hydroxides, rare earth metal compounds, lanthanide oxides/hydroxides, etc., can solve the problem of long operation time and product purity. Insufficient, long process flow and other problems, to achieve the effect of low production cost, good purification effect and simple process

Active Publication Date: 2022-07-22
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the vacuum distillation method has relatively large limitations and is only used to purify metals with high vapor pressure near the melting point. Vacuum smelting and electron beam smelting methods have better purification effects, but the samples volatilize greatly during the smelting process and the recovery rate is low. Electromigration and The electrolytic refining process is long, and the risk of metal contamination during the purification process is high
The main problems in the purification of traditional methods are 1: long operation time and low efficiency; 2: difficult to remove gas impurities O and N; 3: high requirements for raw materials and insufficient product purity; 4: poor operating environment, easy to cause secondary pollution

Method used

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  • An integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nanomaterials by arc plasma method
  • An integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nanomaterials by arc plasma method
  • An integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nanomaterials by arc plasma method

Examples

Experimental program
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Effect test

Embodiment 1

[0062] An integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nanomaterials by arc plasma method, the specific process is as follows:

[0063] In step (1), the rare earth metal gadolinium block is used as the first anode (the mass is about 20 g), the tungsten rod is used as the first cathode, and the first cathode and the first anode are placed vertically in the electric arc furnace (for example, along the The vertical direction of the direction), and the spacing is 8mm, after the electric arc furnace is evacuated, filled with argon (Ar) of 50kPa, start the arc, adjust the current to be 100A to carry out plasma smelting for 20min, and obtain the rare earth metal gadolinium ingot after smelting, The purity was detected by inductively coupled plasma mass spectrometer (ICP-MS).

[0064]In step (2), the rare earth metal gadolinium ingot obtained in the above step (1) is prepared into a gadolinium oxide nanomaterial by an arc plasma method: th...

Embodiment 2

[0066] An integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nanomaterials by arc plasma method, the specific process is as follows:

[0067] In step (1), the rare earth metal gadolinium block is used as the first anode (the mass is about 20 g), the tungsten rod is used as the first cathode, the first cathode and the first anode are vertically placed in the electric arc furnace, and the distance is 8 mm, After the electric arc furnace was evacuated, the argon gas of 50kPa was charged, the arc was started, and the electric current was adjusted to be 125A to carry out plasma smelting for 20 min. ) for purity testing.

[0068] In step (2), the rare earth metal gadolinium ingot obtained in the above step (1) is prepared into a gadolinium oxide nanomaterial by an arc plasma method: the rare earth metal gadolinium ingot is used as the second anode, and the tungsten rod is used as the second cathode, The second cathode and the second anode are...

Embodiment 3

[0070] An integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nanomaterials by arc plasma method, the specific process is as follows:

[0071] In step (1), the rare earth metal gadolinium block is used as the first anode (the mass is about 20 g), the tungsten rod is used as the first cathode, the first cathode and the first anode are vertically placed in the electric arc furnace, and the distance is 8 mm, After the electric arc furnace was evacuated, the argon gas of 50kPa was charged, the arc was started, and the electric current was adjusted to be 150A to carry out plasma smelting for 20 min. ) for purity testing.

[0072] In step (2), the rare earth metal gadolinium ingot obtained in the above step (1) is prepared into a gadolinium oxide nanomaterial by an arc plasma method: the rare earth metal gadolinium ingot is used as the second anode, and the tungsten rod is used as the second cathode, The second cathode and the second anode are...

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Abstract

The invention discloses an integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nanomaterials by an arc plasma method. The method includes: using a rare earth metal gadolinium block as a first anode, a tungsten rod as a first cathode, and placing the first cathode and the first anode in an electric arc furnace, after the electric arc furnace is evacuated for the first time, and then charged into the first cathode. a plasma gas and start the arc, so that the impurities in the rare earth metal gadolinium ingot are removed in the form of volatilization to obtain rare earth metal gadolinium ingot with higher purity; the rare earth metal gadolinium ingot located in the electric arc furnace is used as the second anode, located in the arc furnace The tungsten rod in the furnace is used as the second cathode. After the electric arc furnace is evacuated for the second time, the second plasma gas is charged and the arc is started, and the products on the inner wall of the reaction chamber of the electric arc furnace are collected to obtain gadolinium oxide nanomaterials. The above method has the advantages of simple operation, excellent environment, good purification effect, high efficiency and high product purity, and realizes the integration of metal purification by arc plasma method and preparation of metal-based nanomaterials.

Description

technical field [0001] The invention relates to the field of preparation of rare earth metal nanomaterials, in particular to an integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nanomaterials by an arc plasma method. Background technique [0002] Rare earths are valuable strategic resources and are widely used in cutting-edge technology and military industries. Rare earth elements were originally found in minerals in Sweden, and materials containing rare earth elements are called rare earth materials. Rare earth elements include a total of 17 kinds, namely lanthanides - lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium ( Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), and two other lanthanides with very similar properties Elements - Scandium (Sc) and Yttrium (Y). Rare earth elements have a specific 4f ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B59/00C22B9/22C01F17/224C01F17/10
CPCC22B59/00C22B4/04C22B9/226C01F17/224C01F17/10
Inventor 梁风唐政刚解志鹏张达杨斌戴永年姚耀春
Owner KUNMING UNIV OF SCI & TECH
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