CN100569970C - The method of energy-saving sintering neodymium iron boron - Google Patents
The method of energy-saving sintering neodymium iron boron Download PDFInfo
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- CN100569970C CN100569970C CNB2007100454273A CN200710045427A CN100569970C CN 100569970 C CN100569970 C CN 100569970C CN B2007100454273 A CNB2007100454273 A CN B2007100454273A CN 200710045427 A CN200710045427 A CN 200710045427A CN 100569970 C CN100569970 C CN 100569970C
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Abstract
The present invention relates to a kind of method of energy-saving sintering neodymium iron boron, concrete steps are: 1, power switch is pushed automated location, mechanical pump starts; 2, the diffusion pump heater switch is pushed heating location, diffusion pump begins heating; 3, open stove face plate, shove charge is put into body of heater to product by technological process; 4, with the gauze that soaks sherwood oil the fire door circle is wiped clean, closed fire door then; 5, press automatic button, enter the automatic sequence control process, sintering oven is finished heating, insulation, inflation and blower fan starting cooling automatically; 6, after the end to be cooled, come out of the stove.Be characterized in: in the sintering program operation process, increase diffusion pump closing control point, utilize PLC, temp controlled meter and inflation output, control the Push And Release of diffusion pump by sintering oven PLC program.This method can be saved a large amount of electric energy; Improve the work-ing life of diffusion pump oil, reduce equipment failure; Avoided for energy-conservation and adopt manual intervention to produce mishandle.
Description
Technical field
The invention belongs to a kind of power-economizing method of NbFeB sintered process.
Background technology
In the production process of high performance sintered neodymium-iron-boron, the hydrogen crushing process is used widely, to reducing the neodymium iron boron production cost, enhance product performance very big application prospect is all arranged, but in the sintering process of the neodymium iron boron of the broken technology of employing hydrogen, long-time deflation course is arranged, in this process, require not need to use diffusion pump for the vacuum tightness of sintering oven.Comprising as the used vacuum sintering furnace of the production process of existing high performance sintered neodymium-iron-boron (shown in Figure 1): body of heater 1, expansion pump 2, heating power supply 3, housing 4, mechanical pump 5, high vacuum valve 7, lobe pump 6 is slightly taken out valve 8, preceding step valve 9 etc.
The production process of high performance sintered neodymium-iron-boron:
1, power switch is pushed automated location, this moment, mechanical pump started.
2, the diffusion pump heater switch is pushed heating location, this moment, diffusion pump began heating.
3, open stove face plate, shove charge is put into body of heater to product by technological process.
4, with the gauze that soaks sherwood oil the fire door circle is wiped clean, closed fire door then.
5, click automatic button, just enter the automatic sequence control process.Sintering oven is finished heating, insulation, inflation and blower fan starting cooling automatically.
6, after the end to be cooled, can come out of the stove,
When carrying out second furnace operating, as long as repeat 3,4,5 operation stepss.
In whole sintering oven schedule of operation process, unless human intervention could allow diffusion pump quit work.
Therefore, in the production process of existing high performance sintered neodymium-iron-boron, also can't accurately control the deflation course of diffusion pump automatically, cause energy loss big.
Summary of the invention
Technical problem to be solved by this invention is to satisfy under the condition of NbFeB sintered processing requirement, reduces the energy consumption of sintering oven, and a kind of method of energy-saving sintering neodymium iron boron is provided.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of method of energy-saving sintering neodymium iron boron, concrete steps are:
1, power switch is pushed automated location, mechanical pump starts;
2, the diffusion pump heater switch is pushed heating location, diffusion pump begins heating;
3, open stove face plate, shove charge is put into body of heater to product by technological process;
4, with the gauze that soaks sherwood oil the fire door circle is wiped clean, closed fire door then;
5, press automatic button, enter the automatic sequence control process, sintering oven is finished heating, insulation, inflation and blower fan starting cooling automatically;
6, after the end to be cooled, come out of the stove;
Be characterized in: in the above-mentioned sintering program operation process, increase diffusion pump closing control point, utilize PLC, temp controlled meter and inflation output, control the Push And Release of diffusion pump by sintering oven PLC program.
Enter 800 ℃ in the sintering program, product venting be incubated after 60 minutes, and temp controlled meter is to PLC input dividing potential drop sintering commencing signal, and PLC export control signal, opens the diffusion pump preheating, and locked preceding step valve and high vacuum valve can not be opened; When the product venting finished, vacuum tightness reaches opened the required vacuum tightness of diffusion pump.
After the sintering program entered 1080 ℃ of insulation end, PLC output control signal was opened inflation valve, closed the diffusion pump heating simultaneously; Close and slightly take out valve and high vacuum valve, open preceding step valve, guarantee the normal cooling of diffusion pump.
The invention has the beneficial effects as follows:
1. save a large amount of electric energy.About 3300 tons of sintered NdFeB blank annual production, calculate by every stove product 330Kg, be total to about 10000 stoves, about 10.5 hours of the diffusion pump heating power of every stove product minimizing use 9KW, altogether can saves energy: 10000 stoves * 9 kilowatt * every degree electricity of 10.5 hours/stove=945000 kilowatt-hours then can be saved the electricity charge: 49.14 ten thousand yuan by 0.52 yuan of calculating every year.
2. improve the work-ing life of diffusion pump oil, reduce equipment failure.Because the every stove of diffusion pump has shortened more than half duration of service, double the work-ing life of diffusion pump oil, reduced half because the fault that diffusion pump causes is then corresponding.
3. avoided for energy-conservation and adopt manual intervention to produce mishandle.The automatic control ratio workman operation of PLC is more reliable safer.
Description of drawings
Fig. 1 is the used vacuum sintering furnace synoptic diagram of the present invention;
Fig. 2 is sintering process process of the present invention and diffusion pump service condition chart;
Wherein: diffusion pump " 0 " expression is closed, and " 1 " expression is opened.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
The method of energy-saving sintering neodymium iron boron of the present invention, concrete steps are:
1, power switch is pushed automated location, mechanical pump starts;
2, the diffusion pump heater switch is pushed heating location, diffusion pump begins heating;
3, open stove face plate, shove charge is put into body of heater to product by technological process;
4, with the gauze that soaks sherwood oil the fire door circle is wiped clean, closed fire door then;
5, press automatic button, enter the automatic sequence control process, sintering oven is finished heating, insulation, inflation and blower fan starting cooling automatically;
6, after the end to be cooled, come out of the stove.
Wherein: sintering process: according to NbFeB sintered technology, adopt sintering oven PLC program, in the sintering program operation process, increase the reference mark, close diffusion pump in due course, in whole sintering process, the time that diffusion pump is closed always has 630 minutes as shown in Figure 2.Utilize PLC, temp controlled meter and inflation output, control the Push And Release of diffusion pump.Enter 800 ℃ of insulating processes in the sintering program, product begins a large amount of venting, be incubated 60 minutes after, utilize temp controlled meter to PLC input dividing potential drop sintering commencing signal, begin to open the diffusion pump preheating, when the product venting finished, vacuum tightness has also just reached opened the required vacuum tightness of diffusion pump.And opening before the diffusion pump, preceding step valve and main valve are all locked and can not open, and assurance equipment runs well.After 1080 ℃ of insulations finish, when opening inflation valve, also close the diffusion pump heating simultaneously, and slightly take out valve this moment and preceding step valve is all closed and only opened to main valve, guarantee the normal cooling of diffusion pump.
Claims (1)
1. the method for an energy-saving sintering neodymium iron boron, concrete steps are:
1) power switch is pushed automated location, mechanical pump starts;
2) the diffusion pump heater switch is pushed heating location, diffusion pump begins heating;
3) open stove face plate, shove charge is put into body of heater to product by technological process;
4) with the gauze that soaks sherwood oil the fire door circle is wiped clean, closed fire door then;
5) press automatic button, enter the automatic sequence control process, sintering oven is finished heating, insulation, inflation and blower fan starting cooling automatically;
6) after the end to be cooled, come out of the stove;
It is characterized in that: in the above-mentioned sintering program operation process, increase diffusion pump closing control point, utilize PLC, temp controlled meter and inflation output, control the Push And Release of diffusion pump by sintering oven PLC program;
When the sintering program enters 800 ℃, the product venting be incubated after 60 minutes, and temp controlled meter is to PLC input dividing potential drop sintering commencing signal, and PLC export control signal, opens the diffusion pump preheating, and locked preceding step valve and high vacuum valve can not be opened; When the product venting finished, vacuum tightness reaches opened the required vacuum tightness of diffusion pump; After the sintering program entered 1080 ℃ of insulation end, PLC output control signal was opened inflation valve, closed the diffusion pump heating simultaneously; Close and slightly take out valve and high vacuum valve, open preceding step valve, guarantee the normal cooling of diffusion pump.
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| CNB2007100454273A CN100569970C (en) | 2007-08-30 | 2007-08-30 | The method of energy-saving sintering neodymium iron boron |
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| CNB2007100454273A CN100569970C (en) | 2007-08-30 | 2007-08-30 | The method of energy-saving sintering neodymium iron boron |
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| CN101200780A CN101200780A (en) | 2008-06-18 |
| CN100569970C true CN100569970C (en) | 2009-12-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601367A (en) * | 2011-01-24 | 2012-07-25 | 北京中科三环高技术股份有限公司 | Heat treatment method of radiation or multi-pole orientation magnet ring |
| CN103000363A (en) * | 2012-11-02 | 2013-03-27 | 宁波永久磁业有限公司 | Partial pressure sintering method for sintering neodymium-iron-boron magnet |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103357872A (en) * | 2012-06-12 | 2013-10-23 | 北京京磁强磁材料有限公司 | Sintering technology of NdFeB (neodymium iron boron) magnet |
-
2007
- 2007-08-30 CN CNB2007100454273A patent/CN100569970C/en active Active
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| 制备工艺对高矫顽力烧结钕铁硼永磁材料的影响. 唐杰.四川大学硕士学位论文. 2006 |
| 制备工艺对高矫顽力烧结钕铁硼永磁材料的影响. 唐杰.四川大学硕士学位论文. 2006 * |
| 多室连续式真空炉的研制与应用. 刘阳兴等.真空，第42卷第2期. 2005 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601367A (en) * | 2011-01-24 | 2012-07-25 | 北京中科三环高技术股份有限公司 | Heat treatment method of radiation or multi-pole orientation magnet ring |
| CN102601367B (en) * | 2011-01-24 | 2016-02-03 | 北京中科三环高技术股份有限公司 | The heat treatment method of a kind of radiation or multipole oriental magnetic ring |
| CN103000363A (en) * | 2012-11-02 | 2013-03-27 | 宁波永久磁业有限公司 | Partial pressure sintering method for sintering neodymium-iron-boron magnet |
| CN103000363B (en) * | 2012-11-02 | 2015-08-19 | 宁波永久磁业有限公司 | The dividing potential drop sintering method of Sintered NdFeB magnet |
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| CN101200780A (en) | 2008-06-18 |
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