Method for extracting rare earth elements and rare earth extraction system

A rare earth element and extraction technology, applied in the direction of improving process efficiency, can solve the problems of difficulty in determining the correct position of stratification, manual observation of stratified liquid level, and high initial investment cost, so as to ensure non-emulsification, reduce dosage, and speed up The effect of mass transfer speed

Inactive Publication Date: 2013-02-20
陆文光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this prior art is that the layered liquid level can only be observed manually through the upper mirror, and it is difficult to determine the correct position of the layered layer
The disadvantages of this existing technology are: large space occupation, high initial investment cost (in order to make the purity of each single rare earth product reach 99.99%, often use a mixing clarifier device above 1000 grades), low extraction rate

Method used

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  • Method for extracting rare earth elements and rare earth extraction system

Examples

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Effect test

Embodiment 1

[0022] See figure 1 , the rare earth extraction system of this embodiment includes: an extraction tank 1, a stirring shaft 2 arranged on the central axis of the extraction tank 1 and having a paddle 4 at the bottom, inside the extraction tank 1 and on the A plurality of stirring rings 3 axially distributed on the stirring shaft 2, a plurality of static rings 5 ​​arranged on the inner wall of the extraction tank 1 and distributed with each stirring ring 3; the top of the extraction tank 1 is provided with a The heavy liquid inlet for inputting heavy liquid and the light phase outlet for outputting light phase material liquid, the bottom of extraction tank 1 is provided with the light liquid inlet for inputting light liquid and the heavy phase outlet for outputting heavy phase; A clarification tank 8 is arranged above the extraction tank 1, the light phase outlet of the extraction tank 1 is connected to the bottom of the clarification tank 8, and the top of the clarification tan...

Embodiment 2

[0028] The methods for extracting rare earth elements by the above rare earth extraction system include:

[0029] Input the quantitative aqueous solution or suspension of rare earth elements as heavy liquid into the extraction tank 1 through the heavy liquid inlet on the top of the extraction tank 1 (in practice, it can be viewed through the glass on the top of the extraction tank (1) Observe the liquid level with the mirror, when the liquid level reaches the preset height, stop the feed liquid input;);

[0030] Start the stirring shaft 2; at the same time, heat the extraction tank 1 to keep the feed liquid in the extraction tank 1 at a preset temperature;

[0031]The extraction solvent as a light liquid is evenly entered into the extraction tank 1 from the liquid distributor at the bottom of the extraction tank 1. During the stirring process, the bottom-up stepwise mixing and mass transfer are realized between the light and heavy liquids. The light phase liquid that has comp...

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Abstract

The invention relates to a method for extracting rare earth elements and a rare earth extraction system. The method comprises the following steps: inputting quantitative water solution or suspension, as heavy liquid, of rare earth elements into an extraction tank via a heavy liquid inlet at the top of the extraction tank; starting a stirring shaft; filling an extraction solvent as light liquid into the extraction tank uniformly from a liquid distributor at the bottom of the extraction tank, ensuring step-by-step mixing and mass transfer from bottom to top between the light liquid and the heavy liquid in the stirring process and enabling the light phase liquid completing mass transfer to overflow into a decanting tank from the top of the extraction tank; after the light phase liquid is decanted in the decanting tank, discharging the light components via a light liquid outlet at the top of the decanting tank; judging whether extraction is completed by detecting the concentrations of the needed rare earth elements in the light component solution discharged from the decanting tank; after extraction is completed, stopping input of the light liquid and starting an emptying valve below the decanting tank to empty the decanting tank; and discharging the heavy liquid in the extraction tank via a heavy liquid outlet at the bottom of the extraction tank.

Description

[0001] This application is a divisional application, the application number of the original application: 201110222358.5, the name of the invention: the method and extraction system for extracting rare earth elements, and the application date: 2011-8-4. technical field [0002] The invention relates to a method for extracting rare earth elements and a rare earth extraction system. Background technique [0003] Rare earths are the lanthanide elements in the periodic table of chemical elements - 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 closely related to the 15 elements of the lanthanide series Elements - scandium (Sc) and yttrium (Y), a total of 17 elements, called rare earth elements (Rare Earth), referred to as rare earth (RE or R). [0004] In the smelting of rare earths and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B59/00C22B3/26
CPCY02P10/20
Inventor 陆文光
Owner 陆文光
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