CN100452251C - Hydrogen-pulverized flexible processing method for Nd-Fe-B - Google Patents
Hydrogen-pulverized flexible processing method for Nd-Fe-B Download PDFInfo
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- CN100452251C CN100452251C CNB2006101012425A CN200610101242A CN100452251C CN 100452251 C CN100452251 C CN 100452251C CN B2006101012425 A CNB2006101012425 A CN B2006101012425A CN 200610101242 A CN200610101242 A CN 200610101242A CN 100452251 C CN100452251 C CN 100452251C
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Abstract
The present invention relates to a flexible processing method for Nd-Fe-B hydrogen-pulverization, which belongs to the technical field of the manufacture of sintering Nd-Fe-B magnets. The method adopts a flexible processing production mode in the way of connecting an independent hydrogen absorbing device in parallel with more than one corresponding independent internally-heated vacuum dehydrogenating-refrigerating device, and a moving feeding device capable of horizontally butting with the hydrogen absorbing device and the internally-heated vacuum dehydrogenating-refrigerating device and running on an orbit perpendicular to the direction of the butt joint is used for movably feeding materials. Because the working period of the process of hydrogen absorption is only approximately 1/8 of the working period of the process of dehydrogenation, the materials are sent to different dehydrogenating-refrigerating devices for processing by the feeding device in the hydrogen absorbing device to carry out parallel type dehydrogenation processing for the materials according to different characteristics of products in different devices. Under the condition of not affecting a hydrogen absorbing system, a dehydrogenating-refrigerating device can be added according to the increase of production scales to realize the flexible production of different materials. In the process of production, hydrogen gas is a main dangerous source and can be supplied in a concentrated mode, which greatly decrease hydrogen gas dangerous sources in fields with the same scale, and therefore, the present invention is a safe, efficient and flexible processing method for hydrogen-pulverization.
Description
[technical field]
The present invention relates to the flexible processing method that a kind of neodymium iron boron hydrogen is pulverized, belong to Sintered NdFeB magnet and make the field.
[technical background]
Neodymium iron boron hydrogen is pulverized the course of processing and is divided into suction hydrogen-heating dehydrogenation-three processes of cooling; because the operating time is different in three processes; because material contacts with air and is easy to generate oxidation and sends out and answer; all operation process need be worked in vacuum environment or argon shield atmosphere; in the particularly industrialization course of processing, inhale hydrogen and dehydrogenation-about 3-6 of cooling work cycle difference doubly.
According to the difference of dehydrogenation mode of heating, heating chamber is pulverized stove the body of heater outside for external-heat hydrogen, and heating chamber is that internal heat type hydrogen is pulverized stove in body of heater inside.The external-heat heating electric energy that needs of comparing with the internal heat type vacuum furnace is bigger, and present internal heat type neodymium iron boron hydrogen pulverization process stove generally adopts the work of single body of heater periodic, or two kinds of devices of serially connected continuous oven body running.
The hydrogen pulverization process stove of single body of heater periodic work is to concentrate in the vacuum-pressure vessel and carry out work inhaling hydrogen-heating dehydrogenation-three operations of cooling, work period is very long like this, in addition for the sake of security, safety requirements to body of heater is also very high, be not only a vacuum pressure container that can bear malleation, but also want the condition of work can bear high temperature, so operating efficiency is lower, when needs increase production capacity, can only adopts and purchase many same equipment and expand production.
The hydrogen of serially connected continuous operation is pulverized stove (as Fig. 1), will inhale hydrogen and carry out in first vacuum chamber, enters second internal heat type heating chamber vacuum dehydrogenation then and handles, and enters the cooling chamber cooling at last.Though it is slightly higher than single body of heater periodic processing unit efficient like this, but because each activity time is inconsistent, the beat of work is to carry out according to the longest operation, sometimes the product dehydrogenation process parameter of the different trades mark is different, for the management of producing with organize and be not very convenient, increase relatively difficulty of operating room when needing to increase production capacity, it is relatively more expensive to purchase same continuous body of heater fund.
[summary of the invention]
The purpose of this invention is to provide a kind of nd-fe-b permanent magnetic alloy that can in a system, handle heterogeneity, different technology conditions simultaneously, the flexible processing method of entire process process safety, neodymium iron boron hydrogen pulverizing efficiently.
Method of the present invention is: at first set up one independently to inhale hydrogen production device and more than one independently internal heat type vacuum dehydrogenation-cooling device, the material mouth of inhaling hydrogen production device and internal heat type vacuum dehydrogenation-cooling device has same interface size, and be positioned at same vertical plane, the air distribution system of inhaling hydrogen production device is connected with the suction hydrogen production device; Set up one can realize with inhale hydrogen production device, internal heat type vacuum dehydrogenation-cooling device level is docked, and can realize perpendicular to the mobile pay-off of walking on the track of butt joint direction; Under vacuum or protective atmosphere, processed material is placed in effective service area of inhaling hydrogen production device and carries out hydrogenation treatment, after material disposes, mobile pay-off docks in the horizontal direction with the suction hydrogen module, under vacuum or protective atmosphere, material is fetched in the mobile pay-off, mobile pay-off runs to internal heat type vacuum dehydrogenation-cooling device place and docks in the horizontal direction with internal heat type vacuum dehydrogenation-cooling device on the track perpendicular to the butt joint direction, carry out the transmission of material, carry out the dehydrogenation-cooling processing of material at internal heat type vacuum dehydrogenation-cooling device; Then, add the processed material of next group in the hydrogen production device toward inhaling again, repeat aforesaid step, at last material is sent to the dehydrogenation-cooling processing of carrying out material in second internal heat type vacuum dehydrogenation-cooling device; Then, repeat aforesaid step again, make all internal heat type vacuum dehydrogenation-cooling devices all be among the work or make all pending materials all obtain handling.
Above-mentioned suction hydrogen production device is the horizontal vacuum pressure vessel;
Above-mentioned protective atmosphere is meant the protective atmosphere at nitrogen or argon gas;
Above-mentioned one independently inhale hydrogen production device can corresponding 6～8 internal heat type vacuum dehydrogenation-cooling devices.
The present invention adopts parallel flexible processing mode, since inhale the work period of hydrogen process and only be certain embodiments work period about 1/8, inhale in the hydrogen production device to deliver in different dehydrogenation-cooling devices at one and handle by pay-off, make material different qualities according to product in different devices carry out parallel dehydrogenation processing, can be according to production-scale growth, do not influence under the condition of inhaling hydrogen system, increase dehydrogenation-cooling device, the production of realization different material can be carried out Flexible Production, inhaling hydrogen production device for one can corresponding 6～8 dehydrogenation-cooling device, hydrogen is main dangerous matter sources in process of production, can realize concentrating hydrogen supply, having significantly reduced the hydrogen dangerous matter sources in the place of same scale, is a kind of safer therefore, more efficiently, flexible hydrogen is pulverized processing method.
Advantage of the present invention is:
[1] suction hydrogen process concentrates in the isolated system and carries out, and inhales the hydrogen temperature and is lower than 200 ℃, inhales hydrogen pressure and improves 0.5Mpa, has not only improved the suction hydrogen efficiency, and makes in the suction hydrogen process safer.
The body of heater of the hydrogen pulverization process stove of making both at home and abroad is actually internal heat type or External heated vacuum furnace at present, also be a high temperature and high pressure containers that is operated under the hydrogen state simultaneously, so oven body part all entrusts the chemical industry equipment unit of qualification to manufacture and design, then by device fabrication unit's assembling internals, the outer part of configuration.Chemical industry equipment unit is in order to guarantee to use the safety of hydrogen under vacuum, high pressure, high-temperature condition, spell out in the internal heat type Proper Design requires: the furnace wall serviceability temperature is lower than 200 ℃.Because suction hydrogen, dehydrogenation, the cooling of overseas equipment are carried out in a body of heater, in order to reach the safe handling temperature of furnace wall, 600 ℃ of high-temperature dehydrogenations must have reliable heat-insulation layer, and heat-insulation layer has certain useful life, if lost efficacy, might cause the potential safety hazard of equipment.Suction hydrogen process of the present invention is carried out separately in inhaling hydrogen production device, with the high-temperature dehydrogenation process not in same body of heater, actual is exactly to separate inhaling the hydrogen function in the hydrogen pulverization process stove, make the suction hydrogen production device become a simple Hydrogen Vapor Pressure container, there is not the problem of high temperature contact hydrogen, thoroughly eliminated the potential safety hazard under the hydrogen condition of high temperature.
[2] flexible processing (see figure 2)
From the hydrogen comminution process as can be seen, it is the shortest to inhale the hydrogen process, and the dehydrogenation cooling procedure is longer, so just can adopt the pattern of butt joint in parallel, inhaling hydrogen production device for one can corresponding a plurality of parallel dehydrogenation unit, not only can in different dehydrogenation units, carry out the dehydrogenation operation of different condition, can also increase dehydrogenation unit, only need the increase dehydrogenation unit to get final product if expand production according to the needs appropriateness of producing.The magnet specification difference of producing; the hydrogen pulverization process technology that requires also has nothing in common with each other; can in different dehydrogenation units, carry out different dehydrogenating technologies simultaneously; can handle the nd-fe-b permanent magnetic alloy of heterogeneity, different technology conditions simultaneously; whole system is all carried out under vacuum or protective atmosphere from being charged to the whole process of discharging, has avoided the oxidation of material and the leakage of hydrogen.
[description of drawings]
Fig. 1 is the workflow schematic diagram that existing continous way hydrogen is handled stove;
Fig. 2 is a workflow schematic diagram of the present invention.
Among the figure: 1. the air distribution system 2. suction hydrogen production devices 3. internal heat types vacuum dehydrogenation-cooling device A4 that inhales hydrogen production device moves B.7. discharge pedestal of pay-off 5. material platforms 6. internal heat type vacuum dehydrogenation-cooling devices
[embodiment]
Embodiment:
Certain factory processes 600kg Nd Fe B alloys, 48H alloy 300kg wherein, 42M alloy 300kg requires 48H alloy vacuum dehydrogenation to reach below the 3Pa, and the dehydrogenation of 42M alloy reaches below the 16Pa.
One, adopt the single body of heater periodic of 300kg furnaceman to be as mode:
1. handle the 48H alloy earlier:
Inhale 2 hours hydrogen work periods
The dehydrogenation work period; 20 hours
The cooling work cycle: 10 hours
2. handle the 42M alloy
Inhale 2 hours hydrogen work periods
The dehydrogenation work period: 10 hours
The cooling work cycle: 10 hours
Work period amounts to: 54 hours
Two, adopt method of the present invention:
As shown in Figure 2,
1. handle the 48H alloy earlier:
Inhale 2 hours hydrogen work periods
Send into dehydrogenation-cooling device A work period: 20 hours
The cooling work cycle: 1 hour
2. handle the 42M alloy
Inhale 2 hours hydrogen work periods
Send into dehydrogenation-cooling device B work period: 10 hours
The cooling work cycle: 1 hour
Add up to 23 hours operating times
Claims (1)
1, a kind of flexible processing method of neodymium iron boron hydrogen pulverizing, it is characterized in that: at first set up one independently to inhale hydrogen production device and the independently internal heat type vacuum dehydrogenation-cooling device more than two, the material mouth of inhaling hydrogen production device and internal heat type vacuum dehydrogenation-cooling device has same interface size, and be positioned at same vertical plane, the air distribution system of inhaling hydrogen production device is connected with the suction hydrogen production device; Set up one can realize with inhale hydrogen production device, internal heat type vacuum dehydrogenation-cooling device level is docked, and can realize perpendicular to the mobile pay-off of walking on the track of butt joint direction; Under vacuum or protective atmosphere, processed material is placed in effective service area of inhaling hydrogen production device and carries out hydrogenation treatment, after material disposes, mobile pay-off docks in the horizontal direction with the suction hydrogen production device, under vacuum or protective atmosphere, material is fetched in the mobile pay-off, mobile pay-off runs to internal heat type vacuum dehydrogenation-cooling device place and docks in the horizontal direction with internal heat type vacuum dehydrogenation-cooling device on the track perpendicular to the butt joint direction, carry out the transmission of material, carry out the dehydrogenation-cooling processing of material at internal heat type vacuum dehydrogenation-cooling device; Then, add the processed material of next group in the hydrogen production device toward inhaling again, repeat aforesaid step, at last material is sent to the dehydrogenation-cooling processing of carrying out material in second internal heat type vacuum dehydrogenation-cooling device; Then, repeat aforesaid step again, make all internal heat type vacuum dehydrogenation-cooling devices all be among the work or make all pending materials all obtain handling.
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| CNB2006101012425A CN100452251C (en) | 2006-07-04 | 2006-07-04 | Hydrogen-pulverized flexible processing method for Nd-Fe-B |
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| CNB2006101012425A CN100452251C (en) | 2006-07-04 | 2006-07-04 | Hydrogen-pulverized flexible processing method for Nd-Fe-B |
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| CN100452251C true CN100452251C (en) | 2009-01-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101767203B (en) * | 2010-01-05 | 2011-11-16 | 北京科技大学 | Minute spherical hydrogen-storage alloy powder preparation method |
| CN103801700B (en) * | 2012-11-08 | 2016-12-21 | 沈阳中北通磁科技股份有限公司 | RE permanent magnetic alloy flexibility hydrogen breaks process |
| CN103801703B (en) * | 2012-11-08 | 2017-01-18 | 沈阳中北通磁科技股份有限公司 | Rare earth permanent magnetic alloy continuous hydrogen decrepitation process method |
| CN105149599B (en) * | 2015-09-18 | 2018-01-02 | 苏州萨伯工业设计有限公司 | A kind of broken method of hydrogen |
| CN108941578A (en) * | 2018-07-23 | 2018-12-07 | 宁波晋科自动化设备有限公司 | A kind of semi continuous hydrogen processing system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326834A (en) * | 2001-05-21 | 2001-12-19 | 董中天 | Powder producing process and equipment by Rb-Fe-B multiple work station hydrogenation |
| US6403024B1 (en) * | 1999-02-19 | 2002-06-11 | Sumitomo Special Metals Co., Ltd. | Hydrogen pulverizer for rare-earth alloy magnetic material powder using the pulverizer, and method for producing magnet using the pulverizer |
| CN1509831A (en) * | 2002-12-20 | 2004-07-07 | 有研稀土新材料股份有限公司 | Low temperature hydrogen breaking process for quick cooled thick belt of NdFeB |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6403024B1 (en) * | 1999-02-19 | 2002-06-11 | Sumitomo Special Metals Co., Ltd. | Hydrogen pulverizer for rare-earth alloy magnetic material powder using the pulverizer, and method for producing magnet using the pulverizer |
| CN1326834A (en) * | 2001-05-21 | 2001-12-19 | 董中天 | Powder producing process and equipment by Rb-Fe-B multiple work station hydrogenation |
| CN1509831A (en) * | 2002-12-20 | 2004-07-07 | 有研稀土新材料股份有限公司 | Low temperature hydrogen breaking process for quick cooled thick belt of NdFeB |
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Assignee: INNER MONGOLIA BAOTOU STEEL RARE EARTH MAGNETIC MATERIAL CO., LTD. Assignor: Baotou Inst of Rare Earth Contract record no.: 2011990001072 Denomination of invention: Hydrogen-pulverized flexible processing method for Nd-Fe-B Granted publication date: 20090114 License type: Exclusive License Open date: 20061213 Record date: 20111206 |
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