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Rare earth recovery system and recovery process thereof

A recovery system and rare earth technology, applied in the direction of improving process efficiency, etc., can solve the problems of low extraction rate and low extraction purity, achieve high extraction rate, reduce waste, and improve filter press efficiency

Active Publication Date: 2021-12-10
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, the filtrate contains impurities, etc., so that the above process has problems such as low extraction purity and low extraction rate.

Method used

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  • Rare earth recovery system and recovery process thereof
  • Rare earth recovery system and recovery process thereof
  • Rare earth recovery system and recovery process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment provides a structure of a rare earth recovery system.

[0048] Such as figure 1 As shown, a rare earth recovery system includes a filter tank, a clear liquid tank, a sedimentation tank and two dissolution tanks 39, such as figure 2 As shown, the dissolution tank 39 includes a filter press device and a mixing device with a linkage structure, and the filter press device includes a filter press drive mechanism 40 and a filter press rod 29, and the filter press drive mechanism 40 is located at the The inside of the dissolving tank 39, and the filter press driving mechanism 40 is used to drive the filter press rod 29 to press filter the filtrate in the dissolving tank 39;

[0049] The mixing device is located at the inner bottom surface of the dissolving tank 39, and comprises a linkage assembly 41 equipped with a cam 15 and a stirring blade 38 arranged on the side of the linkage assembly 41 for stirring the filtrate in the dissolving tank 39, and the cam 1...

Embodiment 2

[0058] This embodiment provides a rare earth recovery process, using the rare earth recovery system provided in Example 1, comprising the following steps:

[0059] S1: Collect 250m 3 Leach the mother liquor of rare earth mine (test pH=4.8), put the mother liquor into the mixing tank, start stirring, add magnesium oxide (industrial grade, 85% MgO) while pouring the mother liquor, test the pH value of the supernatant, if pH<6.7 Magnesium oxide is then added until the pH of the supernatant reaches 6.7;

[0060] S2: Drain the mixed sediment slurry to the filter tank, and filter it in the filter tank, then drain the clear liquid above the filter tank to the clear liquid tank, and discharge the rare earth mud sediment at the bottom of the filter tank from the sludge discharge port to the dissolution tank ;

[0061] S3: Slowly add oxalic acid and polyethylene glycol solution with a mass ratio of 1:2 to the rare earth mud precipitate in the dissolution tank, adjust the pH value to 5...

Embodiment 3

[0065] This embodiment provides a rare earth recovery process, using the rare earth recovery system provided in Example 1, comprising the following steps:

[0066] S1: Collect 250m 3 Leach the mother liquor of rare earth mine (test pH=4.8), pour the mother liquor into the mixing tank, start stirring, add magnesium oxide (industrial grade, 85% MgO) while pouring the mother liquor, test the pH value of the supernatant, if the pH<7.2 Magnesium oxide is then added until the pH of the supernatant reaches 7.2;

[0067] S2: Drain the mixed sediment slurry to the filter tank, and filter it in the filter tank, then drain the clear liquid above the filter tank to the clear liquid tank, and discharge the rare earth mud sediment at the bottom of the filter tank from the sludge discharge port to the dissolution tank ;

[0068] S3: Slowly add oxalic acid and polyethylene glycol solution with a mass ratio of 1:10 to the rare earth mud precipitate in the dissolution tank, adjust the pH valu...

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Abstract

The invention discloses a rare earth recovery system. The rare earth recovery system comprises a filter tank, a clear liquid tank, a sedimentation tank and two dissolving tanks, wherein each dissolving tank comprises a filter pressing device and a uniform mixing device which are provided with linkage structures. The invention further discloses a rare earth recovery process using the rare earth recovery system. According to the rare earth recovery system and the rare earth recovery process, the filter pressing structures and the uniform mixing structures in the dissolving tanks are improved, so that the filter pressing structures and the uniform mixing structures can be subjected to linkage operation, the filter pressing efficiency is improved, the filtrate is fully dissolved, and the extraction rate of rare earth ore is improved. The rare earth recovery system is simple in structure, the rare earth recovery process is convenient and fast, large-batch rare earth recovery can be carried out, and manpower and material resources are saved.

Description

technical field [0001] The invention relates to the technical field of rare earth recovery, in particular to a rare earth recovery system and a recovery process thereof. Background technique [0002] Rare earth minerals mainly exist in the form of minerals in the earth's crust, and there are three main types: as the basic constituent elements of minerals, rare earths exist in the mineral lattice in the form of ionic compounds, and constitute an essential component of minerals. These minerals are usually called rare earth minerals. Rare earth mineral elements are known as "industrial vitamins". They have irreplaceable excellent magnetic, optical and electrical properties, and play a huge role in improving product performance, increasing product varieties, and increasing production efficiency. . Due to their great effect and low dosage, rare earths have become an important element to improve product structure, increase technological content, and promote technological progress...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B59/00C22B3/02C22B3/22C22B3/44
CPCC22B59/00C22B3/02C22B3/22C22B3/44Y02P10/20
Inventor 张春雷
Owner JIANGXI UNIV OF SCI & TECH
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