CN2558457Y - Air-current powder mill for powdering Nd-Fe-B permanent-magnet material - Google Patents
Air-current powder mill for powdering Nd-Fe-B permanent-magnet material Download PDFInfo
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- CN2558457Y CN2558457Y CN 02268342 CN02268342U CN2558457Y CN 2558457 Y CN2558457 Y CN 2558457Y CN 02268342 CN02268342 CN 02268342 CN 02268342 U CN02268342 U CN 02268342U CN 2558457 Y CN2558457 Y CN 2558457Y
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- permanent magnet
- airflow
- magnet material
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Abstract
The utility model relates to a crushing device, concretely an airflow grinding mill for milling of Nd-Fe-B permanent magnet materials. The airflow grinding mill comprises an airflow crushing room, a feeding mechanism communicated with the airflow crushing room, a nitrogen feeding mechanism and a magnet powder collecting mechanism. The magnet powder collecting mechanism is a filtering whirlwind-type collector compounded with the functions of whirlwind and filtering in one body. A valve is arranged at the bottom of the airflow crushing room. A vacuum pump is connected to the air outlet of the grinding mill. The utility model improves the present airflow grinding mills for milling of Nd-Fe-B permanent magnet materials and overcomes the disadvantages of present grinding mills, providing a grinding mill meeting the milling art requirement of the high-performance Nd-Fe-B permanent magnet. The manufactured magnet powder has a sharp and reasonable particle size distribution curve; the finally manufactured Nd-Fe-B permanent magnet has high performance. Also the utility model has the advantages of convenient operation and nitrogen saving.
Description
Technical field
The utility model relates to reducing mechanism, is specially Nd-Fe-Bo permanent magnet material powder process Air Grinder.
Background technology
Existing Nd-Fe-Bo permanent magnet material powder process Air Grinder comprises an air-flow pulverizing chamber, and linking with the air-flow pulverizing chamber is provided with feeding mechanism, nitrogen gas supply mechanism and captures mechanism by the magnetic that cyclone dust collectors, filter constitute.Feeding mechanism is sent Nd-Fe-Bo permanent magnet material into the air-flow pulverizing chamber, under the air blast effect that the nitrogen compressor of nitrogen gas supply mechanism provides, permanent-magnet material collides mutually to be realized pulverizing, permanent-magnet material after the efflorescence enters magnetic with the classified device classification of air-flow and captures mechanism, trap varigrained magnetic respectively by cyclone dust collectors and filter, since filter traps to magnetic be superfine powder, very easily oxidation, can't be used for further processing and manufacturing neodymium iron boron magnetic body, cause the granularity of magnet powder distribution curve unreasonable.The air-flow pulverizing chamber finally can be left the material that some can't be pulverized and particle is bigger, last under the effect of air-flow, process capture mechanism returns and tells, since return tell not thorough, in capturing mechanism, transmission pipeline, form residual, make that sneaking into oarse-grained time in the finished product magnetic tells material, size distribution curve is further worsened, finally influence the magnetic of neodymium iron boron magnetic body.
Existing flour mill need be discharged the air in the flour mill before formal the use, and the oxygen content in it is reduced to below the standard value, and therefore, nitrogen gas supply mechanism long-time input nitrogen in flour mill extrudes air with the way of diluting from exhaust outlet before use.Required evacuation time is long, make troubles to use, and the nitrogen consumption is big.
Summary of the invention
The utility model solves the problem that prior art exists, and a kind of Nd-Fe-Bo permanent magnet material powder process Air Grinder of new structure is provided.
The utility model is to adopt following technical scheme to realize: Nd-Fe-Bo permanent magnet material powder process Air Grinder, the feeding mechanism that comprises the air-flow pulverizing chamber, links with the air-flow pulverizing chamber, nitrogen gas supply mechanism and magnetic capture mechanism, and magnetic captures the filtration cyclone type trap of mechanism for whirlwind, filtering function are integrated in one.This filtration cyclone type trap is existing known products, and domestic have this product of many manufacturer production at present, this kind trap of producing as Shanghai chemical industry three factories, the pure and fresh powder machinery in Yixing Co., Ltd.Though, filter the cyclone type trap and be existing known products, but use beyond example still on Air Grinder in Nd-Fe-Bo permanent magnet material powder process, key is to use this filtration cyclone type trap superfine powder and fine powder can be captured together, collect, guaranteed the reasonable of granularity of magnet powder distribution curve, and then the magnetic of raising Nd-Fe-B permanent magnet, promptly use filtration cyclone type trap can produce outstanding, significant technique effect.
Bottom in the air-flow pulverizing chamber is provided with valve.This valve can adopt butterfly valve or slide valve.Return and to tell material and can directly discharge, and need not to return and tell through capturing mechanism, effectively avoided bulky grain to return telling material in the finished product magnetic, occurring as prior art through this valve from the air-flow pulverizing chamber.
Existing flour mill is provided with exhaust outlet on the nitrogen output channel of its capture mechanism, during flour mill emptying gas, open this exhaust outlet, and the air in the flour mill is discharged from this exhaust outlet under the effect of pressure nitrogen gas, then, and with this exhaust close.The utility model is provided with vavuum pump mutually with the exhaust outlet of flour mill, by vavuum pump the air in the flour mill is aspirated, and reaches certain vacuum and leads to into nitrogen afterwards again, thereby accelerate the emptying gas speed of flour mill, simultaneously, reduces nitrogen use level.The exhaust outlet of flour mill can be located on the nitrogen output channel that captures mechanism, also can be located at the upper end of air-flow pulverizing chamber.
The utility model has overcome the shortcoming of existing flour mill by to the improvement of existing Nd-Fe-Bo permanent magnet material powder process with Air Grinder, has provided the flour mill that a kind of flouring technology that can satisfy the high-performance Ne-Fe-B permanent magnet requires.The granularity of magnet powder distribution curve of its output is sharp-pointed, and size distribution curve is reasonable, and the neodymium iron boron magnetic body of final output has high performance.Easy to use, saving nitrogen.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of air-flow pulverizing chamber;
The specific embodiment
Nd-Fe-Bo permanent magnet material powder process Air Grinder, the feeding mechanism that comprises air-flow pulverizing chamber 1, links with the air-flow pulverizing chamber, nitrogen gas supply mechanism and magnetic capture mechanism, feeding mechanism is made of the spiral propeller 4 of batch can 2, feed bin 3, feed bin bottom, and the nitrogen gas supply mechanism is by nitrogen compressor 5, constitute with air accumulator 6, the freeze-dryer 7 that links to each other with air accumulator 6 and nitrogen transfer tube that nitrogen compressor links.Magnetic captures the filtration cyclone type trap 8 of mechanism for whirlwind, filtering function are integrated in one.Be provided with valve 9 in the bottom of air-flow pulverizing chamber, valve adopts butterfly valve.Be provided with vavuum pump 10 mutually with the exhaust outlet of flour mill, the exhaust outlet 17 of flour mill is located at the upper end of air-flow pulverizing chamber.
Flour mill before use, open vavuum pump 10, air in the suction flour mill, after reaching the certain vacuum degree, the nitrogen gas supply mechanism is found time the gas in the flour mill by vavuum pump to the flour mill nitrogen injection again, and nitrogen reinjects, oxygen content in flour mill is reduced to below the License Value, and flour mill begins normal operation.Neodymium iron boron in the batch can enters the air-flow pulverizing chamber through feed bin, spiral propeller, simultaneously, the compressed machine of nitrogen gas supply mechanism is to air-flow pulverizing chamber discharge pressure nitrogen, under the effect of stream of nitrogen gas, permanent-magnet material collides mutually, pulverizes, clasfficiator 13 classifications of permanent-magnet material after the pulverizing in the air-flow pulverizing chamber enter filtration cyclone type trap with air-flow, and the finished product magnetic enters in the finished product batch can 11 by filtering cyclone type trap outlet at bottom.Returning in the air-flow pulverizing chamber told material and run up to when a certain amount of, opens the butterfly valve of air-flow pulverizing chamber bottom, returns to tell material and enter back and tell in the batch can 12.
Charging aperture at the flour mill feed bin, the material outlet is told in returning of the finished product magnetic discharging opening of trap and air-flow pulverizing chamber, be equipped with and be used for linking with batch can, the transitional coupling of unified specification, vacuum valve 14 is housed above, nitrogen valve 15, pressure vacuum gauge 16, oxygen analyser etc., after opening the batch can valve, transitional coupling shows a jar interior oxygen content immediately, air pressure, if oxygen content exceeds standard, vacuumize at once, replenish nitrogen, after oxygen content is lower than standard value, could open transitional coupling batch can and flour mill are connected, guarantee like this to advance under the hypoxia condition, discharging.
Claims (3)
1, a kind of Nd-Fe-Bo permanent magnet material powder process Air Grinder, the feeding mechanism that comprises air-flow pulverizing chamber (1), links with the air-flow pulverizing chamber, nitrogen gas supply mechanism and magnetic capture mechanism, it is characterized by: magnetic captures the filtration cyclone type trap (8) of mechanism for whirlwind, filtering function are integrated in one.
2, Nd-Fe-Bo permanent magnet material powder process Air Grinder as claimed in claim 1 is characterized by: be provided with valve (9) in the bottom of air-flow pulverizing chamber.
3, as claim 1,2 described Nd-Fe-Bo permanent magnet material powder process Air Grinders, it is characterized by: be provided with vavuum pump (10) mutually with the exhaust outlet of flour mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02268342 CN2558457Y (en) | 2002-07-16 | 2002-07-16 | Air-current powder mill for powdering Nd-Fe-B permanent-magnet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02268342 CN2558457Y (en) | 2002-07-16 | 2002-07-16 | Air-current powder mill for powdering Nd-Fe-B permanent-magnet material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2558457Y true CN2558457Y (en) | 2003-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02268342 Expired - Fee Related CN2558457Y (en) | 2002-07-16 | 2002-07-16 | Air-current powder mill for powdering Nd-Fe-B permanent-magnet material |
Country Status (1)
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| CN (1) | CN2558457Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552087B (en) * | 2008-12-16 | 2011-04-06 | 宁波科宁达工业有限公司 | Device and method for removing burr of molded neodymium iron boron product |
| CN102728841A (en) * | 2012-07-10 | 2012-10-17 | 交城县融和磁材有限公司 | Airflow powder grinding device and method for sintered neodymium iron boron (NdFeB) permanent magnet material |
| CN102842419A (en) * | 2012-09-12 | 2012-12-26 | 厦门钨业股份有限公司 | Sintered Nd-Fe-B magnet manufacturing method and device |
| CN102842418A (en) * | 2012-09-12 | 2012-12-26 | 厦门钨业股份有限公司 | Sintered Nd-Fe-B magnet manufacturing method and device |
| CN103721818A (en) * | 2012-10-11 | 2014-04-16 | 中磁科技股份有限公司 | Method used for reducing temperature of grinding chamber of fluidization air-stream mill |
| WO2015013836A1 (en) * | 2013-07-31 | 2015-02-05 | 江西金力永磁科技有限公司 | Rare earth permanent magnet production process and device |
| CN105536960A (en) * | 2015-11-27 | 2016-05-04 | 金堆城钼业股份有限公司 | Preparation system and preparation method of low-oxygen ultrafine molybdenum disulfide |
| CN105964376A (en) * | 2016-05-20 | 2016-09-28 | 江苏普隆磁电有限公司 | Preparation device of magnetic particles |
| CN106241847A (en) * | 2016-08-16 | 2016-12-21 | 海宁永欣科技咨询有限公司 | A kind of manufacture method of ground calcium carbonate |
| CN110732399A (en) * | 2019-09-30 | 2020-01-31 | 包头韵升强磁材料有限公司 | method for improving outturn percentage of sintered neodymium iron boron jet mill powder |
-
2002
- 2002-07-16 CN CN 02268342 patent/CN2558457Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552087B (en) * | 2008-12-16 | 2011-04-06 | 宁波科宁达工业有限公司 | Device and method for removing burr of molded neodymium iron boron product |
| CN102728841A (en) * | 2012-07-10 | 2012-10-17 | 交城县融和磁材有限公司 | Airflow powder grinding device and method for sintered neodymium iron boron (NdFeB) permanent magnet material |
| CN102728841B (en) * | 2012-07-10 | 2014-06-04 | 交城县融和磁材有限公司 | Airflow powder grinding device and method for sintered neodymium iron boron (NdFeB) permanent magnet material |
| CN102842419A (en) * | 2012-09-12 | 2012-12-26 | 厦门钨业股份有限公司 | Sintered Nd-Fe-B magnet manufacturing method and device |
| CN102842418A (en) * | 2012-09-12 | 2012-12-26 | 厦门钨业股份有限公司 | Sintered Nd-Fe-B magnet manufacturing method and device |
| CN103721818B (en) * | 2012-10-11 | 2015-12-02 | 中磁科技股份有限公司 | A kind of method reducing fluidisation air-flow mill grinding room temperature |
| CN103721818A (en) * | 2012-10-11 | 2014-04-16 | 中磁科技股份有限公司 | Method used for reducing temperature of grinding chamber of fluidization air-stream mill |
| WO2015013836A1 (en) * | 2013-07-31 | 2015-02-05 | 江西金力永磁科技有限公司 | Rare earth permanent magnet production process and device |
| CN105536960A (en) * | 2015-11-27 | 2016-05-04 | 金堆城钼业股份有限公司 | Preparation system and preparation method of low-oxygen ultrafine molybdenum disulfide |
| CN105536960B (en) * | 2015-11-27 | 2018-09-07 | 金堆城钼业股份有限公司 | A kind of preparation system and preparation method thereof of the ultra-fine molybdenum disulfide of hypoxemia |
| CN105964376A (en) * | 2016-05-20 | 2016-09-28 | 江苏普隆磁电有限公司 | Preparation device of magnetic particles |
| CN106241847A (en) * | 2016-08-16 | 2016-12-21 | 海宁永欣科技咨询有限公司 | A kind of manufacture method of ground calcium carbonate |
| CN110732399A (en) * | 2019-09-30 | 2020-01-31 | 包头韵升强磁材料有限公司 | method for improving outturn percentage of sintered neodymium iron boron jet mill powder |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |