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Method for pre-processing neodymium iron boron wire cutting waste oil sludge

A wire cutting and NdFeB technology, applied in the field of pretreatment of NdFeB wire cutting waste oil sludge, can solve the problems of waste of rare earth resources, environmental pollution, etc., and achieve the effect of good temperature control and simple operation

Inactive Publication Date: 2013-02-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this method is not only a great waste of rare earth resources, but also causes huge pollution to the local environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Take 10ml of the sludge produced after wire cutting and pour it into the rotating bottle. Fix the rotating bottle on the right end of the rotating shaft, close the vacuum valve, vacuum, and keep the pressure inside the tube at 0.1 MPa, set the temperature to 50°C and set the speed to 10 rpm. At this time, turn on the heating button and the rotary button of the rotary evaporator, and adjust the height of the rotating bottle to start the water bath heating. Keep the temperature, speed, and pressure unchanged for 1h22min, then the liquid in the rotating bottle can be evaporated to dryness. After cooling, the material is taken out, and the rare earth oxide is obtained through acid dissolution, impurity removal, extraction separation, precipitation, and burning.

Embodiment 2

[0014] Take 10ml of the sludge produced after wire cutting and pour it into the rotating bottle. Fix the rotating bottle on the right end of the rotating shaft, close the vacuum valve, vacuum, and keep the pressure inside the tube at 0.01 MPa, set the temperature to 80°C and set the speed to 100 rpm. At this time, turn on the heating button and the rotary button of the rotary evaporator, and adjust the height of the rotating bottle to start the water bath heating. Keep the temperature, speed, and pressure unchanged for 44 minutes to evaporate the liquid in the rotating bottle. After cooling, the material is taken out, and the rare earth oxide is obtained through acid dissolution, impurity removal, extraction separation, precipitation, and burning.

Embodiment 3

[0016] Take 10ml of the sludge produced after wire cutting and pour it into the rotating bottle. Fix the rotating bottle on the right end of the rotating shaft, close the vacuum valve, perform vacuuming, and keep the pressure inside the tube at 0.1 MPa, set the temperature to 100°C, and set the speed to 300 rpm. At this time, turn on the heating button and the rotary button of the rotary evaporator, and adjust the height of the rotating bottle to start the water bath heating. Keep the temperature, speed, and pressure unchanged for 27 minutes, and then the liquid in the rotating bottle can be evaporated to dryness. After cooling, the material is taken out, and the rare earth oxide is obtained through acid dissolution, impurity removal, extraction separation, precipitation, and burning.

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Abstract

The invention relates to a method for pre-processing neodymium iron boron wire cutting waste oil sludge, belonging to the filed of rare earth recycle. The method comprises the following steps: distilling oil sludge after neodymium iron boron wire cutting at 50-100 DEG C at 10-300rpm with 0.01-0.1MPa, and carrying out acid dissolution, edulcoration, extraction separation, deposition and ignition on remaining products after distillation to obtain rear earth oxide, namely pouring the oil sludge after neodymium iron boron wire cutting in a revolving bottle for distillation by controlling the temperature, the air pressure and the rotary speed, and carrying out acid dissolution, edulcoration, extraction separation, deposition and ignition on remaining products after distillation to obtain rear earth oxide. The waste is oxidized and roasted when pre-processing is unnecessary; and the method is free of dust air pollution and is beneficial to environmental protection.

Description

Technical field [0001] The invention relates to a method for pretreatment of waste sludge from neodymium iron boron wire cutting. Background technique [0002] Rare earth is known as the industrial "gold". Because of its excellent photoelectromagnetic and other physical properties, it can form a wide variety of new materials with different properties and other materials. Its most significant function is to greatly improve the quality and performance of other products. Therefore, it is widely used in the material preparation field of many industries. Such as "military field", "petrochemical field", "new materials" and so on. However, it is precisely because rare earths are consumed in large quantities by various industries that the recycling of rare earths from waste materials has become more important. [0003] The most rare earth element materials are undoubtedly the rare earth permanent magnet material neodymium iron boron. In the production process of the rare earth permanent ...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B59/00
Inventor 刘敏赖伟鸿索红莉董传博金琼花岳明刘卫强张东涛马麟王毅
Owner BEIJING UNIV OF TECH
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