JP2014123585A - Demagnetization method of neodymium magnet, rotary drum device for neodymium magnet segregation, and neodymium magnet recovery device - Google Patents

Demagnetization method of neodymium magnet, rotary drum device for neodymium magnet segregation, and neodymium magnet recovery device Download PDF

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JP2014123585A
JP2014123585A JP2012277510A JP2012277510A JP2014123585A JP 2014123585 A JP2014123585 A JP 2014123585A JP 2012277510 A JP2012277510 A JP 2012277510A JP 2012277510 A JP2012277510 A JP 2012277510A JP 2014123585 A JP2014123585 A JP 2014123585A
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neodymium magnet
neodymium
magnet
rotary drum
rotating drum
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JP5921426B2 (en
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Takeshi Abe
武司 阿部
Takuya Tsushima
拓哉 對馬
Yoji Murakami
洋二 村上
Kazuyoshi Murasawa
一喜 村澤
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Mitsubishi Electric Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a demagnetization method of a neodymium magnet, a rotary drum device for neodymium magnet segregation and a neodymium magnet recovery device, in which the neodymium magnet is easily demagnetized and crushed together with an apparatus incorporating the neodymium magnet to segregate between the neodymium magnet and other product components.SOLUTION: According to a demagnetization method of a neodymium magnet, a temperature of an apparatus (hard disk drive 1) incorporating the neodymium magnet is raised to 150 to 200°C, thereby a magnetic flux density of the neodymium magnet is made into 0.6 to 1.2 T (Tesla). A rotary drum device for attracting neodymium magnet crushed pieces 15 in a crushed object 11 obtained by crushing the apparatus incorporating the neodymium magnet demagnetized in accordance with the demagnetization method comprises: a rotary drum 13 for neodymium magnet segregation including a demagnetizing coil for demagnetizing the rotary drum; a demagnetizer 2 for demagnetizing the rotary drum 13 for neodymium magnet segregation and the neodymium magnet in the apparatus; and a crusher 3 for crushing the apparatus.

Description

この発明は、ネオジム磁石を内蔵した機器からネオジム磁石を効率的に回収することができるネオジム磁石の減磁方法、ネオジム磁石分別用の回転ドラム、ネオジム磁石回収装置に関するものである。   The present invention relates to a method for demagnetizing a neodymium magnet, a rotating drum for separating neodymium magnets, and a neodymium magnet collecting apparatus that can efficiently collect a neodymium magnet from a device incorporating a neodymium magnet.

現在、ネオジム磁石と呼ばれている希土類の一種を使用した磁石は、モータを中心として多くの製品に欠かせないものとなっている。
ネオジム自体の素材価値が他の希土類と比べて特段高価とは言えず、またよく添加される稀少価値の高いジスプロシウムの含有量も数％であるため、ネオジム磁石の価値は貴金属と比べると安価であったため、様々な製品からこのネオジム磁石を取り出しリサイクルを行うための技術開発及び、回収とリサイクルを行うスキームの構築は活発でなかった。 At present, magnets using a kind of rare earth called neodymium magnets are indispensable for many products, mainly motors.
Since the material value of neodymium itself is not particularly expensive compared to other rare earths, and the content of rare dysprosium that is often added is only a few percent, the value of neodymium magnets is cheap compared to precious metals. For this reason, technological development for extracting and recycling this neodymium magnet from various products and construction of a scheme for collecting and recycling were not active.

しかしながら、ここ数年に渡る国際情勢の変化からレアアースを再利用する試みがされている。
特許文献１では、モータをモータの巻線被膜の溶解温度以下に加熱する工程と、ステータ電機子巻線に減衰交流電流を印加し磁界を発生させる工程を用いて磁石の減磁を行い、ネオジム磁石を回収する技術を提案している。 However, due to changes in the international situation over the past few years, attempts have been made to reuse rare earths.
In Patent Document 1, a magnet is demagnetized using a step of heating a motor below the melting temperature of the winding film of the motor and a step of applying a damped alternating current to the stator armature winding to generate a magnetic field. Proposes a technique for collecting magnets.

特許第３６３６０１９号公報Japanese Patent No. 3636019

市場に多く流通しているネオジム磁石を内蔵した機器、例えば、ハードディスクドライブは、２．５インチと３．５インチのサイズの物が多い。
ハードディスクドライブは、リサイクル家電４品目のように効率よく解体し各構成物を分離する手法は未だ確立されていない。
ハードディスクドライブの分別方法としては、もっぱら手作業による解体により基盤のみを分離する方法や、全体をそのまま、粉々に破砕する方法がある。
破砕すると破砕機の内部や他の鉄部材に磁石が密着したままとなり、ネオジム磁石を効率よく回収するのは困難である。
ネオジム磁石は、概ね成分の約６５％が鉄、２８％がネオジム、残りの数％がジスプロシウムという組成である。
ネオジム磁石の保持力は、磁石の中で最も強力であり、少量であっても完全に着磁されたネオジム磁石を使用している製品、構成物からネオジム磁石のみを分離することは、機械の故障を誘発し易く、非常に危険である。
また、ハードディスクドライブ内部のネオジム磁石は、ヨークと呼ばれる鉄に接着剤で取り付けられており、このヨークの大半はハードディスクドライブの筐体に螺子で固定されているので、そのまま破砕して性質の違いを用いて他の組成物と分離すること、特に鉄と分離することが困難である。 Devices with built-in neodymium magnets that are widely distributed in the market, for example, hard disk drives, are often 2.5 inch and 3.5 inch sizes.
The hard disk drive has not yet been established as a method for efficiently dismantling and separating the components, like the four items of recycled home appliances.
Hard disk drive separation methods include a method of separating only the base by manual dismantling and a method of crushing the whole as it is.
When crushed, the magnet remains in close contact with the inside of the crusher and other iron members, and it is difficult to efficiently collect the neodymium magnet.
Neodymium magnets generally have a composition in which about 65% of the component is iron, 28% is neodymium, and the remaining several percent is dysprosium.
The holding power of neodymium magnets is the strongest of all magnets. Even if a small amount of magnets are used, it is necessary to separate only neodymium magnets from products and components that use fully magnetized neodymium magnets. It is easy to induce failure and very dangerous.
Also, the neodymium magnet inside the hard disk drive is attached to iron called a yoke with an adhesive, and most of this yoke is fixed to the housing of the hard disk drive with screws. It is difficult to use and separate from other compositions, especially iron.

製品からネオジム磁石を分別する方法として、一般的には強磁性体が常磁性体に転移するキュリー温度まで磁石を加熱する手法や、交番減衰磁界を与えて脱磁を行う手法を取った上で、磁石を回収する方法がある。   As a method of separating neodymium magnets from products, in general, a method of heating a magnet to a Curie temperature at which a ferromagnetic material transitions to a paramagnetic material, or a method of demagnetizing by applying an alternating attenuation magnetic field is taken. There is a method of collecting the magnet.

巻き線の端子間に時間と共に減衰する電流を印加して、巻き線に発生した磁界を利用してネオジム磁石を減磁させるには、常温では２０ＫＡ程度の大電流を流すことが必要となる。   In order to demagnetize the neodymium magnet using a magnetic field generated in the winding by applying a current that decays with time between the terminals of the winding, it is necessary to pass a large current of about 20 KA at room temperature.

しかし、一般的なモータの巻き線に２０ＫＡの大電流を流すと、端子もしくは巻き線が瞬時に損傷し必要な磁界が発生しない。
そこで、特許文献１では、製品を巻き線皮膜の溶解温度以下や許容冷媒温度以下となる１００℃や１３０℃位以下の温度に一旦加熱して保持し、磁束密度を低下させた後、端子間に減衰交流電流を印加し、更に減磁する手法が記載されている。 However, if a large current of 20 KA is passed through a general motor winding, the terminal or winding is instantaneously damaged and a necessary magnetic field is not generated.
Therefore, in Patent Document 1, the product is once heated and held at a temperature of 100 ° C. or 130 ° C. or lower, which is equal to or lower than the melting temperature of the winding film or the allowable refrigerant temperature, and after decreasing the magnetic flux density, between terminals. Describes a method of applying a damped alternating current and further demagnetizing.

しかし、この場合も、温度管理と高電流印加という２つの高エネルギーのパラメータを管理する必要が生じるためネオジム磁石の分別にコストと手間がかかるという課題があった。   However, also in this case, it is necessary to manage two high-energy parameters, namely temperature control and high current application, so that there is a problem that cost and labor are required for separating neodymium magnets.

この発明は、このような課題を解決するためになされたものであり、ネオジム磁石を内蔵した機器ごとネオジム磁石を簡便に減磁させた後、破砕を行ってネオジム磁石と他の製品構成物とを分別する、ネオジム磁石の減磁方法、ネオジム磁石分別用の回転ドラム、ネオジム磁石回収装置を提供することを目的とする。   This invention was made to solve such a problem, and after demagnetizing the neodymium magnet easily together with the device incorporating the neodymium magnet, it was crushed to produce the neodymium magnet and other product components. An object is to provide a method for demagnetizing a neodymium magnet, a rotating drum for separating neodymium magnets, and a neodymium magnet recovery device.

この発明に係る、ネオジム磁石の減磁方法は、
ネオジム磁石を内蔵した機器の温度を摂氏１５０〜２００度の温度まで昇温させ、ネオジム磁石の磁束密度を０．６〜１．２Ｔ（テスラ）にするものである。 The demagnetizing method of the neodymium magnet according to the present invention is as follows:
The temperature of the device incorporating the neodymium magnet is raised to a temperature of 150 to 200 degrees Celsius, and the magnetic flux density of the neodymium magnet is set to 0.6 to 1.2 T (Tesla).

この発明に係る、ネオジム磁石の減磁方法は、
ネオジム磁石を内蔵した機器の温度を摂氏１５０〜２００度の温度まで昇温させ、ネオジム磁石の磁束密度を０．６〜１．２Ｔにするものなので、
ネオジム磁石の磁束密度を、フェライト磁石と同程度の０．６〜１．２Ｔの磁束密度にコントロールすることが出来るので、ネオジム磁石の取り扱いが容易で安全である。 The demagnetizing method of the neodymium magnet according to the present invention is as follows:
Since the temperature of the device incorporating the neodymium magnet is raised to a temperature of 150 to 200 degrees Celsius and the magnetic flux density of the neodymium magnet is 0.6 to 1.2 T,
Since the magnetic flux density of the neodymium magnet can be controlled to the same magnetic flux density of 0.6 to 1.2 T as that of the ferrite magnet, handling of the neodymium magnet is easy and safe.

この発明の実施の形態１に係るネオジム磁石回収装置の構成を示すブロック図である。It is a block diagram which shows the structure of the neodymium magnet collection | recovery apparatus which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係るネオジム磁石回収装置の動作のフローである。It is a flow of operation | movement of the neodymium magnet collection | recovery apparatus which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係るハードディスクドライブ内のネオジム磁石の形状と磁束密度の測定点を示す図である。It is a figure which shows the measuring point of the shape and magnetic flux density of the neodymium magnet in the hard disk drive which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係るネオジム磁石をキュリー温度以下の所定の各温度に加熱して５分間保持し、冷却した後の測定点における磁束密度の変化を示す図である。It is a figure which shows the change of the magnetic flux density in the measuring point after heating the neodymium magnet which concerns on Embodiment 1 of this invention to each predetermined temperature below Curie temperature, hold | maintaining for 5 minutes, and cooling.

実施の形態１．
以下、本願発明の実施の形態１に係るネオジム磁石の減磁方法、ネオジム磁石分別用の回転ドラム、ネオジム磁石回収装置を図を用いて説明する。
図１は、ネオジム磁石回収装置１００（以下、装置１００という）の構成を示すブロック図である。
減磁機２は、ネオジム磁石を内蔵した機器（ハードディスクドライブ１）を加熱してハードディスクドライブ１内のネオジム磁石５を減磁する装置である。
破砕機３は、減磁後のハードディスクドライブ１を所定の大きさになるまで破砕する装置である。
振動フィーダ１２は、破砕物１１を分別するための回転ドラム１３に送る装置である。
回転ドラム１３の所定の位置には、回転ドラム１３に付着したネオジム磁石破砕物１５を削ぎ落として回収する固定スクレッパ１６を備えている。
脱磁コイル１７は、回転ドラム１３の脱磁をおこなうコイルである。
脱磁用電源１８は、脱磁コイルに定期的に電流を流すコンデンサー内蔵した電源である。 Embodiment 1 FIG.
A neodymium magnet demagnetization method, a neodymium magnet separation rotating drum, and a neodymium magnet recovery apparatus according to Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a neodymium magnet recovery apparatus 100 (hereinafter referred to as apparatus 100).
The demagnetizer 2 is a device that demagnetizes the neodymium magnet 5 in the hard disk drive 1 by heating a device (hard disk drive 1) containing a neodymium magnet.
The crusher 3 is a device that crushes the hard disk drive 1 after demagnetization to a predetermined size.
The vibration feeder 12 is a device that sends the crushed material 11 to a rotary drum 13 for sorting.
A fixed scraper 16 is provided at a predetermined position of the rotating drum 13 to scrape off and collect the crushed neodymium magnets 15 attached to the rotating drum 13.
The demagnetizing coil 17 is a coil for demagnetizing the rotary drum 13.
The power supply 18 for demagnetization is a power supply with a built-in capacitor that allows a current to flow periodically through the demagnetization coil.

図２は、装置１００の動作のフローである。
まず、ハードディスクドライブ１を加熱工程で加熱し（Ｓ００１）、次に、ハードディスクドライブ１ごと破砕し（Ｓ００２）、破砕物１１を分別する（Ｓ００３）。
図３は、ハードディスクドライブ１内にあるネオジム磁石５の形状と後述する磁束密度の測定点を示す図である。 FIG. 2 is an operation flow of the apparatus 100.
First, the hard disk drive 1 is heated in the heating process (S001), then the entire hard disk drive 1 is crushed (S002), and the crushed material 11 is separated (S003).
FIG. 3 is a diagram showing the shape of the neodymium magnet 5 in the hard disk drive 1 and the measurement points of the magnetic flux density described later.

ネオジム磁石は、３２０〜３４０℃程度の温度に加熱すると、その磁束密度が０になることが知られている。
この温度のことをキュリー温度という。
図４は、ネオジム磁石５をキュリー温度以下の所定の各温度に加熱して５分間保持し、冷却した後の測定点７における磁束密度をそれぞれ計測したときの、加熱温度と、残留した磁束密度の関係を示すグラフである。 It is known that a neodymium magnet has a magnetic flux density of 0 when heated to a temperature of about 320 to 340 ° C.
This temperature is called the Curie temperature.
FIG. 4 shows the heating temperature and the residual magnetic flux density when the neodymium magnet 5 is heated to predetermined temperatures below the Curie temperature, held for 5 minutes, and the magnetic flux density at the measurement point 7 after cooling is measured. It is a graph which shows the relationship.

加熱前のネオジム磁石５は、概ね３．４Ｔの磁束密度を有している。
ネオジム磁石５を１００℃〜１３０℃で加熱処理すると、未だ２Ｔ以上の磁束密度が残っており、非常に強力な磁石のままである。
ネオジム磁石５を１５０℃〜２００℃で加熱処理すると、ネオジム磁石５の磁束密度は、フェライト磁石と同程度の約０．６〜１．２Ｔまで低下して、ネオジム磁石５の取り扱いが容易になる。 The neodymium magnet 5 before heating has a magnetic flux density of approximately 3.4T.
When the neodymium magnet 5 is heat-treated at 100 ° C. to 130 ° C., a magnetic flux density of 2T or more still remains and remains a very strong magnet.
When the neodymium magnet 5 is heat-treated at 150 ° C. to 200 ° C., the magnetic flux density of the neodymium magnet 5 decreases to about 0.6 to 1.2 T, which is the same as that of the ferrite magnet, and the handling of the neodymium magnet 5 becomes easy. .

ネオジム磁石５の加熱方法は、ネオジム磁石５が所定の温度になるまで加熱できる手法であれば何でもよく、電気炉、高周波加熱によりハードディスクドライブ１全体を加熱する方法や、電磁波でハードディスクドライブ１内のネオジム磁石５のみを加熱する方法などが利用可能である。   The neodymium magnet 5 may be heated by any method as long as the neodymium magnet 5 can be heated to a predetermined temperature. The entire hard disk drive 1 may be heated by an electric furnace or high-frequency heating, or the hard disk drive 1 may be heated by electromagnetic waves. A method of heating only the neodymium magnet 5 can be used.

図１の装置１００では、ハードディスクドライブ１を、コンベヤで減磁機２に送り加熱処理する（図２、Ｓ００１）。
加熱し、概ね５分程度保持し、冷却した後のハードディスクドライブ１は、内部のネオジム磁石５の磁束密度が上記のように減少してはいるが、ネオジム磁石５を容易にそのまま取り出すことはできない。 In the apparatus 100 of FIG. 1, the hard disk drive 1 is sent to the demagnetizer 2 by a conveyor and heated (FIG. 2, S001).
Although the magnetic flux density of the internal neodymium magnet 5 is reduced as described above, the hard disk drive 1 after being heated, held for about 5 minutes, and cooled cannot easily take out the neodymium magnet 5 as it is. .

しかし、１５０〜２００℃に加熱処理を行っておけば、ヨークとネオジム磁石５間の接着剤の接着強度は大きく低下しているので、加熱処理の時点でヨークとネオジム磁石５が分離もしくは、軽度の衝撃で分離可能な状態になっている。   However, if the heat treatment is performed at 150 to 200 ° C., the adhesive strength of the adhesive between the yoke and the neodymium magnet 5 is greatly reduced. Therefore, the yoke and the neodymium magnet 5 are separated at the time of the heat treatment or are mild. It can be separated by the impact of.

そこで、ヨークとネオジム磁石５を確実に分離させ、なお且つ、ネオジム磁石のみを回収するために破砕機３により破砕処理工程を行う（図２、Ｓ００２）。
破砕機３は、直径１０ｍｍ〜２０ｍｍの穴の開いたスクリーンが付いた２００ｒｐｍ以下で回転する１軸もしくは２軸のせん断式破砕機である。
また、同様のスクリーン穴が付いた３００ｒｐｍ以下で回転する衝撃式破砕機であっても良い。
破砕処理の衝撃が大きすぎたり破砕機３のスクリーン穴のサイズが小さすぎると、ネオジム磁石５が粉々になってしまう。
したがって、ネオジム磁石５が５ｍｍ〜１０ｍｍ程度のサイズとなるように破砕を行う必要がある。 Therefore, a crushing process is performed by the crusher 3 in order to reliably separate the yoke and the neodymium magnet 5 and collect only the neodymium magnet (FIG. 2, S002).
The crusher 3 is a uniaxial or biaxial shear type crusher rotating at 200 rpm or less with a screen having a hole having a diameter of 10 mm to 20 mm.
Further, an impact crusher that rotates at 300 rpm or less with a similar screen hole may be used.
If the impact of the crushing process is too large or the size of the screen hole of the crusher 3 is too small, the neodymium magnet 5 will be shattered.
Therefore, it is necessary to perform crushing so that the neodymium magnet 5 has a size of about 5 mm to 10 mm.

図１に示すように、破砕機３に加熱処理後のハードディスクドライブ１を投入し、破砕物１１がスクリーン穴を通過するまで破砕を行う。
スクリーン穴を通過したハードディスクドライブ１の破砕物１１には、様々な部材の破片が含まれる。
従って、破砕物１１からネオジム磁石５の破片のみを分別し回収する必要がある（図２、Ｓ００３）。
ヨークに接着されていたネオジム磁石５は、破砕物１１の中で、概ねヨークから分離した状態となっている。 As shown in FIG. 1, the hard disk drive 1 after the heat treatment is put into the crusher 3, and crushing is performed until the crushed material 11 passes through the screen hole.
The crushed material 11 of the hard disk drive 1 that has passed through the screen hole includes fragments of various members.
Therefore, it is necessary to separate and collect only fragments of the neodymium magnet 5 from the crushed material 11 (FIG. 2, S003).
The neodymium magnet 5 bonded to the yoke is in a state of being substantially separated from the yoke in the crushed material 11.

破砕機３の本体、刃物、スクリーン等は鉄素材からなり、磁力の残ったネオジム磁石５が吸着しやすいが、後から次々に投入されるハードディスクドライブ１の破砕処理により、多少ネオジム磁石５の破片が吸着していても、次々と押し出されてスクリーンを通過する。   The main body, blade, screen, etc. of the crusher 3 are made of iron material, and the neodymium magnet 5 with the remaining magnetic force is easily adsorbed. Even if adsorbs, it is pushed out one after another and passes through the screen.

破砕物１１は、ホッパー１０にそのまま投入され振動フィーダ１２に供給される。
ネオジム磁石５には磁力が残っているため、ネオジム磁石５の破片が鉄系の部材の破片に吸着してしまう恐れがある。
そのため、破砕物１１は、堆積させずにすぐに振動フィーダ１２に供給し、ネオジム磁石５の破片と鉄系部材の破片が吸着するのを防ぐのが好ましい。 The crushed material 11 is put into the hopper 10 as it is and supplied to the vibration feeder 12.
Since the magnetic force remains in the neodymium magnet 5, there is a possibility that the fragments of the neodymium magnet 5 are attracted to the fragments of the iron-based member.
Therefore, it is preferable that the crushed material 11 is immediately supplied to the vibration feeder 12 without being deposited to prevent the broken pieces of the neodymium magnet 5 and the broken pieces of the iron-based member from adsorbing.

振動フィーダ１２の先端部の下方に鉄製の回転ドラム１３を設置し、振動フィーダ１２上の破砕物１１の進行方向と同じ方向に一定速度で回転させる。
この回転ドラム１３の表面に振動フィーダ１２先端から落下した破砕物１１が接触する。
磁性を帯びていない鉄系破砕物１４（磁束密度が０）は、回転ドラム１３の表面に吸着することなく回転ドラム１３の表面を滑って前方のシュートに落下する。
一方、磁性を帯びているネオジム磁石破砕物１５は、回転ドラム１３の表面を滑り落ちず、磁力により回転ドラム１３の表面に吸着したまま回転する。
回転ドラム１３上に付着したネオジム磁石破砕物１５は、固定スクレッパ１６によってそぎ落とされ、後方のシュートで回収する。
このようにして、磁性を帯びているネオジム磁石破砕物１５だけを分別して回収する。 An iron rotating drum 13 is installed below the tip of the vibration feeder 12 and is rotated at a constant speed in the same direction as the traveling direction of the crushed material 11 on the vibration feeder 12.
The crushed material 11 dropped from the tip of the vibration feeder 12 contacts the surface of the rotating drum 13.
The iron-based crushed material 14 (magnetic flux density of 0) that is not magnetized slides on the surface of the rotating drum 13 without being attracted to the surface of the rotating drum 13 and falls to the front chute.
On the other hand, the magnetized crushed neodymium magnet 15 does not slide down the surface of the rotating drum 13 and rotates while adsorbed on the surface of the rotating drum 13 by a magnetic force.
The crushed neodymium magnet 15 adhering to the rotating drum 13 is scraped off by a fixed scraper 16 and collected by a rear chute.
In this way, only the magnetized neodymium magnet fragments 15 are separated and collected.

鉄製の回転ドラム１３は、ネオジム磁石５が吸着するため、中長期的には回転ドラム１３自体が弱い磁性を帯びてしまう。
そうすると、回転ドラム１３自体が磁性を帯びていない鉄系破砕物１４を吸着し、後方のシュートに回収してしまう恐れがある。
これを防止するため、回転ドラム１３を囲むように、回転ドラム１３用の脱磁コイル１７を取り付け、定期的にコンデンサーを内蔵した脱磁用電源１８から電流を流して回転ドラム１３の脱磁を行う。 Since the neodymium magnet 5 is attracted to the iron rotating drum 13, the rotating drum 13 itself becomes weakly magnetized in the medium to long term.
If it does so, there exists a possibility that the rotating drum 13 itself may adsorb | suck the iron-type crushed material 14 which is not magnetized, and may collect | recover to a back chute | shoot.
In order to prevent this, a demagnetizing coil 17 for the rotating drum 13 is attached so as to surround the rotating drum 13, and current is periodically passed from a demagnetizing power source 18 incorporating a capacitor to demagnetize the rotating drum 13. Do.

以上のように、本発明の実施の形態に係るネオジム磁石の減磁方法、ネオジム磁石分別用の回転ドラム１３、ネオジム磁石回収装置１００によれば、ネオジム磁石５の磁束密度を、フェライト磁石と同程度の０．６〜１．２Ｔの磁束密度にコントロールすることが出来るので、ネオジム磁石５の取り扱いが容易で安全である。
また、ネオジム磁石５を他の物と一緒に破砕しても破砕の衝撃に打ち勝って破砕機３の内部に破片が吸着して残ることなく排出できる。
また、ネオジム磁石５には適度に磁束密度が残っているので、分別用の鉄材を用いてネオジム磁石の破片のみを吸着させることにより、容易に他の樹脂、鉄、金属類部材と分別、回収することができる。 As described above, according to the neodymium magnet demagnetization method, the neodymium magnet separation rotating drum 13 and the neodymium magnet recovery device 100 according to the embodiment of the present invention, the magnetic flux density of the neodymium magnet 5 is the same as that of the ferrite magnet. Since the magnetic flux density of about 0.6 to 1.2 T can be controlled, the handling of the neodymium magnet 5 is easy and safe.
Further, even if the neodymium magnet 5 is crushed together with other objects, it can be discharged without overcoming the crushing impact and adhering debris to the inside of the crusher 3.
In addition, since the magnetic flux density remains moderately in the neodymium magnet 5, it can be easily separated and collected from other resin, iron, and metal members by adsorbing only the pieces of neodymium magnet using an iron material for separation. can do.

尚、本発明は、その発明の範囲内において、実施の形態を適宜、変形、省略することが可能である。   In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.

１００ ネオジム磁石回収装置、１ ハードディスクドライブ、２ 減磁機、
３ 破砕機、５ ネオジム磁石、７ 測定点、１０ ホッパー、１１ 破砕物、
１２ 振動フィーダ、１３ 回転ドラム、１４ 鉄系破砕物、
１５ ネオジム磁石破砕物、１６ 固定スクレッパ、１７ 脱磁コイル、
１８ 脱磁用電源。 100 Neodymium magnet recovery device, 1 hard disk drive, 2 demagnetizer,
3 crusher, 5 neodymium magnet, 7 measuring points, 10 hopper, 11 crushed material,
12 Vibrating feeder, 13 Rotating drum, 14 Iron-based crushed material,
15 Neodymium magnet fragment, 16 fixed scraper, 17 demagnetizing coil,
18 Power supply for demagnetization.

Claims (8)

ネオジム磁石を内蔵した機器の温度を摂氏１５０〜２００度の温度まで昇温させ、ネオジム磁石の磁束密度を０．６〜１．２テスラにするネオジム磁石の減磁方法。 A method of demagnetizing a neodymium magnet by raising the temperature of a device incorporating a neodymium magnet to a temperature of 150 to 200 degrees Celsius and setting the magnetic flux density of the neodymium magnet to 0.6 to 1.2 Tesla. 前記機器を摂氏１５０〜２００度にて５分間以上保持する請求項１のネオジム磁石の減磁方法。 The method for demagnetizing a neodymium magnet according to claim 1, wherein the device is held at 150 to 200 degrees Celsius for 5 minutes or more. 請求項１に記載の減磁方法で減磁したネオジム磁石を内蔵する前記機器を破砕した破砕物の中のネオジム磁石破砕物を吸着させる回転ドラムであって、前記回転ドラムを脱磁する脱磁コイルを備えたネオジム磁石分別用の回転ドラム。 A rotary drum for adsorbing a neodymium magnet crushed material in a crushed material obtained by crushing the device containing the neodymium magnet demagnetized by the demagnetization method according to claim 1, wherein the demagnetization is performed to demagnetize the rotary drum. A rotating drum for separating neodymium magnets with coils. 請求項１又は請求項２に記載のネオジム磁石の減磁方法により前記機器内のネオジム磁石を減磁する減磁機と、
前記機器を破砕する破砕機と、
請求項３に記載のネオジム磁石分別用の回転ドラムとを備えたネオジム磁石回収装置。 A demagnetizer that demagnetizes the neodymium magnet in the device by the demagnetization method of the neodymium magnet according to claim 1 or 2,
A crusher for crushing the equipment;
The neodymium magnet collection | recovery apparatus provided with the rotating drum for neodymium magnet fractionation of Claim 3. 前記機器がハードディスクドライブである請求項１又は請求項２に記載のネオジム磁石の減磁方法。 The method for demagnetizing a neodymium magnet according to claim 1, wherein the device is a hard disk drive. 前記機器がハードディスクドライブである請求項３に記載のネオジム磁石分別用の回転ドラム。 The rotating drum for separating neodymium magnets according to claim 3, wherein the device is a hard disk drive. 前記機器がハードディスクドライブである請求項４に記載のネオジム磁石回収装置。 The neodymium magnet recovery apparatus according to claim 4, wherein the device is a hard disk drive. 前記回転ドラムが鉄製である請求項３又は請求項６に記載のネオジム磁石分別用の回転ドラム。 The rotating drum for separating neodymium magnets according to claim 3 or 6, wherein the rotating drum is made of iron.
JP2012277510A 2012-12-20 2012-12-20 Rotating drum for neodymium magnet separation, neodymium magnet recovery device Expired - Fee Related JP5921426B2 (en)

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JPH08331784A (en) * 1995-03-24 1996-12-13 Hitachi Metals Ltd Permanent-magnet type rotary electric machine
JP2003173910A (en) * 2001-12-05 2003-06-20 Yaskawa Electric Corp Electromagnetic equipment
JP2010199110A (en) * 2009-02-23 2010-09-09 Rare Metals 21:Kk Method of recovering neodymium magnet from used equipment, and neodymium magnet collected or recycled by the method

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JPH08331784A (en) * 1995-03-24 1996-12-13 Hitachi Metals Ltd Permanent-magnet type rotary electric machine
JP2003173910A (en) * 2001-12-05 2003-06-20 Yaskawa Electric Corp Electromagnetic equipment
JP2010199110A (en) * 2009-02-23 2010-09-09 Rare Metals 21:Kk Method of recovering neodymium magnet from used equipment, and neodymium magnet collected or recycled by the method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106568631A (en) * 2016-11-07 2017-04-19 韩笑 Food smashing, sampling and detecting device
CN106568631B (en) * 2016-11-07 2019-01-18 韩笑 Food crushes verifying attachment

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