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Method of recovering and extracting rare earth oxides from neodymium iron boron waste

A rare earth oxide, neodymium iron boron technology, applied in the direction of improving process efficiency, can solve the problems of low extraction efficiency, high labor intensity, serious pollution, etc., and achieve the effect of simple implementation and high labor intensity.

Inactive Publication Date: 2017-08-04
XUNWU HENGYUAN TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the recovery and extraction of rare earth oxides from NdFeB waste is not only labor-intensive but also seriously polluting, and the extraction efficiency is also very low.

Method used

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Examples

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Embodiment 1

[0018] Embodiments of the invention include:

[0019] A method for recovering and extracting rare earth oxides from NdFeB waste materials, comprising the following steps:

[0020] (1) The first step: crushing, the NdFeB waste is crushed by a grinder, and the size of the crushed particles is 1cm 2 ;

[0021] (2) The second step: incineration, high-temperature incineration of the crushed NdFeB waste in (1), the incineration product is obtained after incineration, and it is stirred once every fifteen minutes during incineration, and the incineration temperature is 1400 degrees Celsius;

[0022] (3) The third step: cleaning, collecting the incineration product in step (2) and washing with clear water to obtain a clean cleaning product, the number of times of cleaning is 3 times;

[0023] (4) The fourth step: acid dissolution, mix the cleaning material in step (3) according to the ratio of cleaning material and acid 1:1, then continue to add dilute acid to the mixture, and contin...

Embodiment 2

[0027] A method for recovering and extracting rare earth oxides from NdFeB waste in this embodiment consists of the following steps:

[0028] (1) The first step: crushing, the NdFeB waste is crushed by a grinder, and the size of the crushed particles is 2cm 2 ;

[0029] (2) The second step: incineration, high-temperature incineration of the crushed NdFeB waste in (1), the incineration product is obtained after incineration, and it is stirred once every fifteen minutes during incineration, and the incineration temperature is 1500 degrees Celsius;

[0030] (3) The third step: cleaning, the incineration product in step (2) is collected and rinsed with water to obtain a clean cleaning product, and the number of cleanings is 2 times;

[0031] (4) The fourth step: acid dissolution, mix the cleaning material in step (3) according to the ratio of cleaning material and acid 1:1, then continue to add dilute acid to the mixture, and continue to heat the mixture, the heating temperature ...

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PUM

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Abstract

The invention discloses a method of recovering and extracting rare earth oxides from neodymium iron boron waste. The cleaning times in the third step (3) is 2 or 3, the heating time in fourth step (4) is 8-12h, the roasting temperature in the sixth step (6) is 900-1200 DEG C and the roasting time in the sixth step (6) is 2-4h. The method of recovering and extracting the rare earth oxides from the neodymium iron boron waste has the following beneficial effects: the problems in the prior art that the labor intensity is high, the pollution is serious, and the production efficiency is low are solved, and the method is simple to implement and adapts various areas.

Description

technical field [0001] The invention relates to the field of rare earth extraction methods, in particular to a method for recovering and extracting rare earth oxides from NdFeB waste. Background technique [0002] Rare earth resources are strategic resources and non-renewable resources. With the sharp increase in the demand for rare earths in color developers, magnets and electronics industries, it is particularly important to reasonably and effectively improve the utilization of rare earth resources. Using NdFeB waste to recover rare earth elements is one of the important means. Moreover, the use of NdFeB waste to recover rare earth elements has many advantages, such as shortened procedures, reduced costs, and reduced "three wastes" compared with the use of ore to produce rare earth products. At present, the main sources of NdFeB waste are: (1) the furnace pool produced by vacuum smelting, the ultrafine powder produced in the milling process, and the grinding mud produced ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B59/00
CPCC22B7/007C22B59/00Y02P10/20
Inventor 叶亮詹群
Owner XUNWU HENGYUAN TECH DEV CO LTD
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