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Integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nano material by arc plasma method

An arc plasma and rare earth metal technology, which is applied in the preparation/treatment 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: 2021-06-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • 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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  • Integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nano material by arc plasma method
  • Integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nano material by arc plasma method
  • Integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nano material by arc plasma method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0063] Step (1), using rare earth metal gadolinium block as the first anode (mass about 20g), tungsten rod as the first cathode, the first cathode and the first anode are vertically placed in the electric arc furnace (such as vertically along the horizontal The vertical direction of the direction), and the distance is 8mm. After the electric arc furnace is evacuated, it is filled with 50kPa of argon (Ar), starts the arc, adjusts the current to 100A and conducts plasma melting for 20min. After the melting is completed, the rare earth metal gadolinium ingot is obtained. The purity was tested by inductively coupled plasma mass spectrometry (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 m...

Embodiment 2

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

[0067] Step (1), using a rare earth metal gadolinium block as the first anode (mass about 20g), a tungsten rod as the first cathode, the first cathode and the first anode are placed vertically in the electric arc furnace, and the distance is 8mm, After the electric arc furnace was evacuated, it was filled with argon gas of 50kPa, the arc was started, and the current was adjusted to 125A for plasma smelting for 20min. ) 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: using the rare earth gadolinium ingot as a second anode, and the tungsten rod as a second cathode, The second cathode and the second anode are vertically located in the electric arc furnace, and the dist...

Embodiment 3

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

[0071] Step (1), using a rare earth metal gadolinium block as the first anode (mass about 20g), a tungsten rod as the first cathode, the first cathode and the first anode are placed vertically in the electric arc furnace, and the distance is 8mm, After the electric arc furnace was evacuated, it was filled with argon gas of 50kPa, the arc was started, and the current was adjusted to 150A for plasma smelting for 20min. ) 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: using the rare earth gadolinium ingot as a second anode, and the tungsten rod as a second cathode, The second cathode and the second anode are vertically located in the electric arc furnace, and the dist...

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Abstract

The invention discloses an integrated method for purifying rare earth metal gadolinium and preparing a gadolinium oxide nano material through an arc plasma method. The method comprises the steps that a rare earth metal gadolinium block serves as a first anode, a tungsten rod serves as a first cathode, the first cathode and the first anode are placed in an electric arc furnace, after the electric arc furnace is vacuumized for the first time, the furnace is filled with first plasma gas, and an electric arc is started, so that impurities in the rare earth metal gadolinium block are removed in a volatile form to obtain a rare earth metal gadolinium ingot with relatively high purity; a rare earth metal gadolinium ingot located in the electric arc furnace serves as a second anode, a tungsten rod located in the electric arc furnace serves as a second cathode, after the electric arc furnace is vacuumized for the second time, the furnace is filled with second plasma gas, the electric arc is started, products on the inner wall of the reaction cavity of the electric arc furnace are collected, and the gadolinium oxide nano material is obtained. The method is easy to operate, good in environment, good in purification effect, high in efficiency and high in product purity, and integration of metal purification and metal-based nano material preparation by the arc plasma method is achieved.

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 the fields of cutting-edge technology and military industry. Rare earth elements were first discovered in minerals in Sweden, and materials containing rare earth elements are called rare earth materials. There are 17 kinds of rare earth elements in total, namely lanthanide (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 others with very similar properties to the lanthanides Elements - Scandium (Sc) and Yttrium (Y). Rare earth elements have a sp...

Claims

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Application Information

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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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