CN102912112A - Method for pre-processing neodymium iron boron wire cutting waste oil sludge - Google Patents
Method for pre-processing neodymium iron boron wire cutting waste oil sludge Download PDFInfo
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- CN102912112A CN102912112A CN2012104020575A CN201210402057A CN102912112A CN 102912112 A CN102912112 A CN 102912112A CN 2012104020575 A CN2012104020575 A CN 2012104020575A CN 201210402057 A CN201210402057 A CN 201210402057A CN 102912112 A CN102912112 A CN 102912112A
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- iron boron
- neodymium iron
- wire cutting
- oil sludge
- distillation
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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
The present invention relates to a kind of pretreatment process to neodymium iron boron line cutting waste material greasy filth.
Background technology
Rare earth has the title of industry " gold ", because it has the good physical propertys such as photoelectromagnetism, type material that can be different, various in style with the other materials component property, its the most significant function is exactly the quality and performance that increases substantially other products, therefore is widely used in the middle of the field of material preparation of many industries.Such as " military field ", " petrochemical industry ", " novel material " etc.But, from discarded material, recycled rare earth and become more important by a large amount of consumption of industry-by-industry just because of rare earth.
Contain the maximum beyond doubt rare earth permanent-magnetic material neodymium iron boron of rare earth element material, in the middle of the production process of rare earth permanent-magnetic material neodymium iron boron finished product, neodymium iron boron must pass through mechanical workout, is manufactured into rectangle, circle, tile course.And in the middle of this process, can produce nearly 30% line material, abrasive material, blank.Calculate 100,000 tons output in 2010 with China, China will produce 30,000 tons waste material nearly in 1 year, and the content of rare earth that wherein contains also is huge undoubtedly.
Along with the technology of recovering rare earth from neodymium iron boron waste material is increasingly mature, abundant profit has wherein been seen by increasing businessman.According to data, only at the Zhejiang Cixi City, just there are thousands of families in the producer of big and small recovery neodymium iron boron waste material.And this wherein just has the underground black workshop that does not much have qualification of production, and they will obtain the neodymium iron boron waste material that comes, and particularly the greasy filth of line cutting and polishing only is to carry out coarse oxidizing roasting, again through flow processs such as peracid are molten, thus the rare earth element in the middle of extracting.Because these businessmans had not both had production permit, did not have the regular production flow process yet.So this method is not only to the significant wastage of rare earth resources, but also can form to the environment of locality huge pollution.
Summary of the invention
Pretreatment process in the greasy filth that the present invention is intended to carry out producing in the line cutting for neodymium iron boron, overcome the harm that the above-mentioned oxidizing roasting to neodymium iron boron line material greasy filth brings, and simple to operate, temperature is easy to control, can not introduce the series of advantages such as tramp material.
The present invention addresses the above problem the technical scheme of taking to be: the greasy filth that neodymium iron boron is carried out producing after the line cutting is poured in the revolving bottle, adds thermal distillation by the water-bath of rotatory evaporator.Distillation temperature is controlled at 50 ℃ ~ 100 ℃, and the revolving bottle rotating speed is 10rpm ~ 300rpm, and atmospheric pressure is 0.01MPa ~ 0.1MPa in the holding tube.Again, the removal of impurities molten through peracid of remaining product, extracting and separating, precipitation, calcination namely obtain rare earth oxide after the distillation.
The invention has the beneficial effects as follows:
(1) individual workship that compares extensive style is to the pretreatment process in the greasy filth, and this invention need not oxidizing roasting, can not produce tail gas environment is produced pollution.
(2) the rotatory evaporator instrumentation is simple, and is also better to temperature control, can not cause burning.Because being exposed in the air, so be difficult for introducing tramp material.
Embodiment
Below in conjunction with example the present invention is further specified.
Embodiment 1:
With the greasy filth that produces after the line cutting, get 10ml, pour in the middle of the revolving bottle.Revolving bottle is fixed on the right-hand member of turning axle, closes vacuum valve, vacuumize, and to keep intraductal pressure be 0.1MPa, set temperature is 50 ℃ and rotating speed is set is 10 rpm.Open heat button and the rotary knob of rotatory evaporator this moment, regulate the height of revolving bottle, can begin heating in water bath.Keep temperature, rotating speed, the constant 1h22min of pressure, can be with the liquid evaporate to dryness in the revolving bottle.To expect that after cooling body takes out,, removal of impurities molten through peracid, extracting and separating, precipitation, calcination namely obtain rare earth oxide.
Embodiment 2:
With the greasy filth that produces after the line cutting, get 10ml, pour in the middle of the revolving bottle.Revolving bottle is fixed on the right-hand member of turning axle, closes vacuum valve, vacuumize, and to keep intraductal pressure be 0.01MPa, set temperature is 80 ℃ and rotating speed is set is 100 rpm.Open heat button and the rotary knob of rotatory evaporator this moment, regulate the height of revolving bottle, can begin heating in water bath.Keep temperature, rotating speed, the constant 44min of pressure, can be with the liquid evaporate to dryness in the revolving bottle.To expect that after cooling body takes out,, removal of impurities molten through peracid, extracting and separating, precipitation, calcination namely obtain rare earth oxide.
Embodiment 3:
With the greasy filth that produces after the line cutting, get 10ml, pour in the middle of the revolving bottle.Revolving bottle is fixed on the right-hand member of turning axle, closes vacuum valve, vacuumize, and to keep intraductal pressure be 0.1MPa, set temperature is 100 ℃ and rotating speed is set is 300 rpm.Open heat button and the rotary knob of rotatory evaporator this moment, regulate the height of revolving bottle, can begin heating in water bath.Keep temperature, rotating speed, the constant 27min of pressure, can be with the liquid evaporate to dryness in the revolving bottle.To expect that after cooling body takes out,, removal of impurities molten through peracid, extracting and separating, precipitation, calcination namely obtain rare earth oxide.
Claims (1)
1. pretreatment process to neodymium iron boron line cutting waste material greasy filth, it is characterized in that: the greasy filth after the cutting of neodymium iron boron line is distilled, distillation temperature is at 50 ℃ ~ 100 ℃, rotating speed is 10rpm ~ 300rpm, and maintenance pressure is 0.01MPa ~ 0.1MPa, again, the removal of impurities molten through peracid of remaining product, extracting and separating, precipitation, calcination namely obtain rare earth oxide after the distillation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104020575A CN102912112A (en) | 2012-10-20 | 2012-10-20 | Method for pre-processing neodymium iron boron wire cutting waste oil sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104020575A CN102912112A (en) | 2012-10-20 | 2012-10-20 | Method for pre-processing neodymium iron boron wire cutting waste oil sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102912112A true CN102912112A (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104020575A Pending CN102912112A (en) | 2012-10-20 | 2012-10-20 | Method for pre-processing neodymium iron boron wire cutting waste oil sludge |
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| CN (1) | CN102912112A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160681A (en) * | 2013-02-19 | 2013-06-19 | 北京工业大学 | Preprocessing method of preparing neodymium iron boron alloy by using neodymium iron boron grinding-material oil sludge |
| CN103160682A (en) * | 2013-02-19 | 2013-06-19 | 北京工业大学 | Preprocessing method of preparing neodymium iron boron alloy by using neodymium iron boron linear-cutting oil sludge |
| CN103343234A (en) * | 2013-07-19 | 2013-10-09 | 北京工业大学 | Method for preparing neodymium and iron oxides by using neodymium iron boron oil sludge through regeneration and co-precipitation |
| CN104690270A (en) * | 2015-03-08 | 2015-06-10 | 北京工业大学 | Short-process method for preparing high-performance sintered NdFeB magnet by utilizing sintered NdFeB oil sludge waste material |
| CN115449627A (en) * | 2022-10-13 | 2022-12-09 | 中国科学院赣江创新研究院 | Method for oxidizing and roasting neodymium iron boron waste |
-
2012
- 2012-10-20 CN CN2012104020575A patent/CN102912112A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 肖荣晖: "钕铁硼生产中废料的回收及利用", 《有色冶炼》 * |
| 黄劲松，齐美富: "钕铁硼废料资源化利用工艺综述", 《中国资源综合利用》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160681A (en) * | 2013-02-19 | 2013-06-19 | 北京工业大学 | Preprocessing method of preparing neodymium iron boron alloy by using neodymium iron boron grinding-material oil sludge |
| CN103160682A (en) * | 2013-02-19 | 2013-06-19 | 北京工业大学 | Preprocessing method of preparing neodymium iron boron alloy by using neodymium iron boron linear-cutting oil sludge |
| CN103343234A (en) * | 2013-07-19 | 2013-10-09 | 北京工业大学 | Method for preparing neodymium and iron oxides by using neodymium iron boron oil sludge through regeneration and co-precipitation |
| CN104690270A (en) * | 2015-03-08 | 2015-06-10 | 北京工业大学 | Short-process method for preparing high-performance sintered NdFeB magnet by utilizing sintered NdFeB oil sludge waste material |
| CN104690270B (en) * | 2015-03-08 | 2016-11-09 | 北京工业大学 | A kind of Short flow method utilizing sintered NdFeB greasy filth waste material to prepare performance Nd Fe B sintered magnet |
| CN115449627A (en) * | 2022-10-13 | 2022-12-09 | 中国科学院赣江创新研究院 | Method for oxidizing and roasting neodymium iron boron waste |
| CN115449627B (en) * | 2022-10-13 | 2023-12-12 | 中国科学院赣江创新研究院 | Method for oxidizing roasting neodymium iron boron waste |
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Application publication date: 20130206 |