A7 45390? _B7_ 五、發明說明（^ ) (請先閱讀背面之注意事項再填寫本頁) 本發明是有關一種方法，以再度使用藉由分解結合體 之磁性材料所産生的永久磁鐵，以及再度使用此所取得 之磁性材料以製造新産生的磁性材料。 在漸増尺碼大小中技術性産品，尤其是技術産品之廢 料，像是例如電視機、HIFI裝置、電腦、監視器、周邊 裝置，必須再度使用其各櫥元件，或再度利用它作為製 造原料，或將它再循環。此技術性産品合成由不同各個 材料所構成的結合物體，此各痼材料包括某部份的磁性 材料，像是例如钕（Nd)鐵硼。 因此若例如由美國專利號碼US 5 ,330,25 7之擴音器而 為熟知，此永久磁鐵包括由稀有土条金颶所構成β此擴 音機是由於其高效率輕重童而突顯。 熟知的是再使用一些材料，此各値材料之分解再利用 是原料所必須。 在使用大型機器之技術的標準之中，廢料於再加工之 前經常被搗碎。一値搗碎的方法可由US 5, 678, 7 7 3得知， 其所說明描述的方法使得可能經由機械式的方法，將金 屬與塑膠材料分離。然而在磁鐵糸統之中，以此種方法 是不可能將磁性永久磁鐵與鐵部份分離》 經濟部智慧財產局員工消費合作社印製 此由化學化合物所構成稀有土糸金靥的循環，一此化 合物包含稀有土糸金屬一，使其根據US 5,437,70 9以化 學的方式經由將熔化之金屬抽出而贲行。此方法須要一 昂貴的裝置，以從在分離過程中所産生的金靥熔液之中 蒸餾出稀有土条金屬。它並未提供可能性，例如在磁性 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 經濟部智慧財產局員工消費合作社印製 〇3907 . ; A7 45390T_B7__ 五、發明說明（^) 材料敍..鐵-硼之中，同時將其餘的元素鐵（Fe)與硼（B)製 造出。 因此一直存在著此須求，需要一重簡單可執行的方 法，以從結合物體分離出磁性材料。 本發明的目的即在於此，其規範說明一種方法以再度 利用永久磁鐵，它簡單、節省成本而可執行。本發明的 另一個目的是提供一種方法，以從結合物體中分離出磁 性材料，其以特別簡單的方式使用大型機器技術而執 行。 此目的根據本發明之藉由一種將永久磁鐵再利用的方 法而獲得解決，其包括以下之步驟： 一在氣體材料之作用影響之下，將磁體材料與結合物體 分離，此磁性材料經由此作用而脆化。因而也許在氣 體材料作用之前及/或之中及/或之後，在結合物體上施 加機械性作用，其有益於分離過程， —再度利用此取得之磁性材料以製造新產生的永久磁 鐵。 因此，此磁性材料用於脆化，，而從結合物體或是從黏 附於磁性材料上的材料分離。 根據本發明的結合物體是所有一般的技術性產品，其 包括除了磁性材料以外的其他材料。例如用於根據本發 明的結合物體是擴音器、馬達、監視器、電視、HIFI裝 置、電腦、週邊裝置等等。 關於”磁性材料''此槪念是所有一般性的磁性材料，其由 -4- 本紙張尺度適用中國國家標準（CI^S)A4規格（210 X 297公釐） " 1 I------------ _.,'1--— II 訂---ill -線 广.、 (請先閱讀背面之注意事項再填寫本頁) 453107 五、|务明說明（3 ) 一永久磁鐵及/或一軟磁鐵所構成。因而它必須以本發明 的方法，而使磁性材料從所黏附的非磁性材料分離》 (請先閱讀背面之注意事項再填窝本頁) 此根據本發明的可分離的永久磁鐵物質包括較佳是稀 土金屬。例如根據本發明可使用的稀土金屬是Nd，pr，Ce， Sm及Dy。根據本發明可分離的磁鐵材料除了稀土金屬之 外還較佳包括鐵（Fe)、鈷（Co)、硼（B)等元素。此混合部 份，其中此稀土金屬，鐵、鈷或硼存在於磁性材料之中， 此取決於技術與磁性材料之純度。此根據本發明可使用 的磁性材料包括尤其較佳結構分子式的狀態：Nd2FeuB， SmCo 5或Sm “Co, Fe, Cu，Zn)'17。在其中永久磁鐵可以除 了上述元件之外還有其他適合用於永久磁鐵的元素存 在。 所有特別較佳作爲再使用的永久磁鐵，其在基本上是 由Nd2-Fe14-B所構成。例如用於其他之根據本發明可使 用之永久磁鐵材料是由熟知的ΕΡ-Β-0 1 53 744所構成。 此將磁鐵材料與結合物體之分離是在氣體物質的作用 下進行，在其中關於所使用的氣體物質較佳的氫氣。 經濟部智慧財產局員工消費合作社印製 此氣體物質較佳是在溫度範圍從20°C (室溫）至850 °C，以及壓力（絕對）在從0.1巴至150巴之間的範圍內作 用於磁性材料之上。在以氣體物質作脆化處理之前或之 中，可以合適地在一個溫度中進行熱處理，其至少等於 此永久磁鐵的居里溫度。此處理較佳用於將永久磁鐵去 磁，並且使不同材料的分離變得簡單。 已經在脆化過程之中或較佳是脆化過程之後，可以飼' 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 453907 A7 B7 五、發明說明（4) (請先閱讀背面之注意事項再填寫本頁) 如再度獲得氣體物質執行淸除。這較佳是在200 °C至850 °C範圍的溫度中，借助於溫度處理而進行。因此此溫度 處理較佳是在真空或稀有氣體之氛圍之中實施。作爲淸 除之中的溫度範圍特別較佳是在400°C至600°C之間。在 此情況之下，以例如Nd-Fe-B爲基礎的永久磁鐵材料經 由氣體物質例如是氫的淸除，這使得以粉末冶金方式由 再循環材料製成新的永久磁鐵變得簡單。經此而製出得 到一種磁鐵材料，其包含較少部份的氫。此導致良好的 磁性特性與良好的腐蝕穩定性。 此前面所描述的溫度處理使其例如在一個其所熟知抗 熱封閉爐、一貫通爐或在其所熟知的轉動管爐中實施。 在一個其他的較佳實施形式中，當在根據本發明以氣 體物質進行分離時，在結合物體上施加機械作用。此機 械作用可經由通常的搗碎方法，如碾碎、敲打、或燒烤 壓碎而實施。 此將不同的組成部份分離是使其適合經由所熟知的方 式，如篩選、挑選或者磁性，或渦流區隔等區隔方法而 實施。 經濟部智慧財產局員工消費合作社印製 此再利用所製造出的磁鐵材料可以以此種方式執行， 即此所製造出而得的磁鐵材料，當其以本身所熟知方式 製成新產生的磁鐵材料作爲原料使用。自然其爲合適， 將所製造得出的磁鐵材料作爲新的原料在規定的部份混 合中撥入。 在實施根據本發明的方法之前，可以首先將磁性材料 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱） )tS39Q7_b7 _ 五、發明說明（r ) (請先閱讀背面之注意事項再填寫本頁) 與產品經由機械作用作粗略的分離，其例如根據·us 5,678,773之所熟知的方法實行。在此亦適合進行將金屬 與塑膠材料區隔。較佳可以經常將非常強烈磁化的永久 磁鐵在切碎搗碎之前去磁，此例如經由將產品在空氣中 加熱或在空氣隔絕之下（熱解作用）加熱，至居里溫度之上 而成爲可能。 通常以粘合劑將永久磁鐵固定於產品之中，或是它是 將鐵藉由粘著固定於永久磁鐵之上的磁性軛。在機械性 的分離或切碎搗碎之後，可以將此磁鐵由其所黏著的黏 著劑殘渣釋放。爲了分離所黏著的黏著劑，可以使用所 熟知的化學溶劑。一個替代的方法存在於此，其用在空 氣隔絕之下作熾熱處理（熱解作用）而採取額外的分離措 施，將粘著劑殘渣與永久磁鐵分離》 而根據本發明的方法使其特別合適，而不必實行一個 此種步驟將粘著的粘著劑分離。 經濟部智慧財產局員工消費合作社印製 根據本發明方法之一個特別的優點是，由結合物體可 再製而得的幾乎是粉末狀的磁性材料相當的貴，因此使 得它不論有或沒有一額外小數目的製程步驟，均可再以 粉末冶金的方法將其加工處理成高品質新的磁鐵。此 外’以根據本發明的方法可以經由適當地選擇脆化條 件’可以將不同的永久磁鐵合金，例如作爲廢鐵而分離。 其另外一個優點是，在實施根據本發明的方法時，在 此昂貴磁材料的再製之中 > 可以達成高的收穫量。 以下描述實施例，其作爲本發明之說明。 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 453907 A7 ___B7__ 五、發明說明（& ) 第1例： (請先閱讀背面之注杳？事項再填寫本頁) 一個應該再循環使用的用於聽覺或視覺裝置的擴音 機，是由一個圓盤形銳一鐵一硼（Nd-Fe-B)所製的永久磁 鐵，一個鐵罐與鐵盤形狀的鐵磁性軛，以及一·個銅線圈 與具有一薄膜之擴音護手套所構成。此圓盤形的永久磁 鐵質量爲7.1克，其經歷多個步驟之熱處理： a) 在3 5 0 °C的氬氛圍中將其燒紅1小時（此在永久磁鐵的 居里溫度之上>。因此此擴音器之有機組成部份被熱解並 且此永久磁鐵被去磁。 b) 將其在室溫中冷卻，然後將此擴音機，保持於一巴（bar) 壓力下的氫氣中經歷2小時的時間。因而此鈸一鐵一硼 合金吸收氫氣並脆化*而使得此永久磁鐵衰變瓦解成粉 末。 e)將此擴音機系統在真空下燒紅至45(TC經歷5小時， 一直到達0.1毫巴（mbar)的真空》 經濟部智慧財產局員工消費合作社印製 d) 在熱處理之後，以具有2毫米（mm)網目寬度的篩子進 行篩選，以將粉末狀的組成成份與實體的組成成份分 離。此粗大的構成部份較佳是由金屬部件像是鐵罐所構 成。經由磁性分隔可以將鐵性與非磁性粗大的組成元件 再度的分隔。 e) 將所留下的粉末挑選以分離較輕的大部份是非金屬的 組成部份。因此可以製得的粉末至32.3%由稀土金屬 (Nd，Pr，Dy)所構成，至1%由硼所構成並且至66.7%由鐵 所構成。它平均可重新製得6.8克的钕一鐵一硼（Nd- 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 453907 A7 一 -1 B7___ 五、發明說明（7 )A7 45390? _B7_ V. Description of the Invention (^) (Please read the notes on the back before filling this page) The present invention is a method to reuse the permanent magnets produced by disassembling the magnetic material of the combined body, and again The obtained magnetic material is used to manufacture a newly produced magnetic material. Technical products in the increasing size, especially the waste of technical products, such as televisions, HIFI devices, computers, monitors, and peripheral devices, must use their cabinet components again, or reuse it as manufacturing materials, or Recycle it. This technical product synthesizes a combined object composed of different materials, each of which contains some magnetic material, such as neodymium (Nd) iron boron. Therefore, if it is well known, for example, from US Pat. No. 5,330,257, a loudspeaker, the permanent magnet includes a rare earth barn, and this loudspeaker is prominent because of its high efficiency. It is well known that some materials are reused, and the decomposition and reuse of each material is necessary for the raw materials. Among the standards for using large machines, waste is often smashed before reprocessing. A method of mashing is known from US 5,678, 7 7 3, and the method described makes it possible to separate the metal from the plastic material by a mechanical method. However, in the magnet system, it is impossible to separate the magnetic permanent magnets from the iron part by this method. ”The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed this cycle of rare earth urns made of chemical compounds. This compound contains the rare earth rhenium metal I, which is allowed to limp through chemical extraction according to US 5,437,70 9 by pulling out the molten metal. This method requires an expensive device to distill the rare earth metal from the gold tin melt produced during the separation process. It does not provide the possibility, such as the application of the Chinese National Standard (CNS) A4 specification (210 X 297 mm) on the magnetic paper scale. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 03907.; A7 45390T_B7__ 5. Description of the invention ( ^) Material description: Among the iron-boron, the remaining elements iron (Fe) and boron (B) are manufactured at the same time. Therefore, there has always been a need for a simple and executable method to separate magnetic materials from bonded objects. This is the object of the present invention, which specifies a method for reusing permanent magnets, which is simple, cost-effective and executable. Another object of the invention is to provide a method for separating magnetic materials from a bonded object, which is performed in a particularly simple manner using large machine technology. This object is solved according to the present invention by a method for reusing a permanent magnet, which includes the following steps:-The magnetic material is separated from the bonded object under the influence of the action of the gas material, and the magnetic material passes through the action And brittle. Therefore, it may be possible to apply a mechanical action on the bonded object before and / or during and / or after the action of the gaseous material, which is beneficial to the separation process—reusing the magnetic material obtained here to produce a new permanent magnet. Therefore, the magnetic material is used for embrittlement, and is separated from a bonded object or a material adhered to the magnetic material. The bonding object according to the present invention is all general technical products, which include materials other than magnetic materials. For example, the combined objects used in accordance with the present invention are a loudspeaker, a motor, a monitor, a television, a HIFI device, a computer, a peripheral device, and the like. Regarding "magnetic materials", this idea is all general magnetic materials. The paper size applies to the Chinese National Standard (CI ^ S) A4 specification (210 X 297 mm). --------- _., '1 --— II Order --- ill -Xiang Guang., (Please read the precautions on the back before filling this page) 453107 V. | Be sure to explain (3 ) A permanent magnet and / or a soft magnet. It must be separated from the non-magnetic material by the method of the present invention (Please read the precautions on the back before filling the page) The detachable permanent magnet material according to the present invention includes preferably a rare earth metal. For example, the rare earth metals that can be used according to the present invention are Nd, pr, Ce, Sm, and Dy. The detachable magnet materials according to the present invention are other than the rare earth metal. It also preferably includes elements such as iron (Fe), cobalt (Co), boron (B), etc. This mixed portion, in which the rare earth metal, iron, cobalt or boron is present in the magnetic material, depends on the technology and magnetic material Purity. This magnetic material that can be used according to the present invention includes a state of a particularly preferred structural molecular formula: Nd2F euB, SmCo 5 or Sm "Co, Fe, Cu, Zn) '17. Among them, in addition to the above-mentioned elements, other elements suitable for the permanent magnet may be present. All of the permanent magnets which are particularly preferred for reuse are basically composed of Nd2-Fe14-B. For example, other permanent magnet materials which can be used according to the present invention are composed of the well-known EP-B-0 1 53 744. This separation of the magnet material from the bonded object is performed under the action of a gaseous substance, among which hydrogen gas is preferred with respect to the gaseous substance used. This gaseous substance is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs in a temperature range from 20 ° C (room temperature) to 850 ° C, and pressure (absolute) in the range from 0.1 bar to 150 bar On top of magnetic material. Before or during the embrittlement treatment with a gaseous substance, the heat treatment may be suitably performed at a temperature which is at least equal to the Curie temperature of the permanent magnet. This process is preferably used to demagnetize permanent magnets and to make the separation of different materials simple. Already in the embrittlement process or preferably after the embrittlement process, the paper size is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) 453907 A7 B7 V. Description of the invention (4) (please (Please read the precautions on the back before filling out this page.) This is preferably carried out at a temperature in the range of 200 ° C to 850 ° C by means of temperature treatment. Therefore, this temperature treatment is preferably performed in an atmosphere of a vacuum or a rare gas. The temperature range to be eliminated is particularly preferably between 400 ° C and 600 ° C. In this case, the permanent magnet material based on, for example, Nd-Fe-B is eliminated by a gaseous substance such as hydrogen, which makes it simple to make a new permanent magnet from a recycled material in a powder metallurgy manner. As a result, a magnet material is obtained, which contains a smaller portion of hydrogen. This results in good magnetic properties and good corrosion stability. This previously described temperature treatment makes it possible, for example, to implement it in a well-known heat-resistant closed furnace, a through furnace or in a well-known rotating tube furnace. In a further preferred embodiment, a mechanical action is exerted on the binding object when separating with a gaseous substance according to the invention. This mechanical action can be carried out by usual mashing methods, such as crushing, beating, or grilling and crushing. This separation of the different components makes them suitable for implementation by well-known methods such as screening, sorting, or magnetic, or eddy current separation. The magnetic material produced by the reuse cooperative printed by the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs can be implemented in such a way that the magnetic material produced here can be made into a newly generated magnet in a manner known per se. Materials are used as raw materials. Naturally, it is appropriate, and the manufactured magnet material is transferred as a new raw material in a prescribed partial mixing. Before implementing the method according to the present invention, the magnetic material can be applied to the Chinese paper standard (CNS) A4 specification (210 X 297). TS39Q7_b7 _ V. Description of the invention (r) (Please read the note on the back first) Please fill in this page again) and make a rough separation from the product by mechanical action, for example, according to the well-known method of us 5,678,773. It is also suitable for separating metal from plastic materials. It is preferred that often very strongly magnetized permanent magnets be demagnetized before being shredded, for example by heating the product in air or under air insulation (pyrolysis) to a temperature above the Curie temperature. may. The permanent magnet is usually fixed in the product with an adhesive, or it is a magnetic yoke that fixes iron to the permanent magnet by adhesion. After mechanical separation or shredding, the magnet can be released from the adhesive residue to which it is attached. To separate the adhered adhesive, a well-known chemical solvent can be used. An alternative method exists here, which is used for red heat treatment (pyrolysis) under air insulation to take additional separation measures to separate the adhesive residue from the permanent magnet. The method according to the invention makes it particularly suitable Without having to perform one such step to separate the sticky adhesive. A special advantage of the method of printing according to the invention by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economics is that the almost powdery magnetic material that can be reproduced from the combined object is quite expensive, thus making it with or without an extra small The number of process steps can be processed into high-quality new magnets by powder metallurgy. In addition, in the method according to the present invention, different permanent magnet alloys can be separated, for example, as scrap iron, by appropriately selecting embrittlement conditions. Another advantage is that in carrying out the method according to the invention, a high yield can be achieved in the reproduction of this expensive magnetic material. Examples are described below as an illustration of the present invention. This paper size applies to China National Standard (CNS) A4 specification (210 X 297 mm) 453907 A7 ___B7__ 5. Description of the invention (&) Example 1: (Please read the note on the back? Matters before filling out this page) A Loudspeakers for audio or visual devices that should be recycled are permanent magnets made of a disc-shaped sharp-iron-boron (Nd-Fe-B), an iron can, and a ferromagnetic yoke in the shape of an iron disc. And a copper coil and a sound reinforcement glove with a film. This disc-shaped permanent magnet has a mass of 7.1 grams and undergoes several steps of heat treatment: a) It is red for 1 hour in an argon atmosphere at 350 ° C (this is above the Curie temperature of the permanent magnet >;. So the organic part of this loudspeaker is pyrolyzed and the permanent magnet is demagnetized. B) Cool it at room temperature, and then keep this loudspeaker in hydrogen at one bar pressure. Go through 2 hours. As a result, this hafnium-iron-boron alloy absorbs hydrogen and embrittles *, causing the permanent magnet to decay into powder. e) The amplifier system is red to 45 under vacuum (TC goes through 5 hours and reaches a vacuum of 0.1 mbar). Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. d) After heat treatment, A sieve with a mesh width of (mm) is sieved to separate the powdery constituents from the solid constituents. This large component is preferably composed of a metal part such as an iron can. By magnetic separation, ferrous and non-magnetic coarse components can be separated again. e) Select the remaining powder to separate the lighter, mostly non-metallic components. Therefore, the powder that can be produced is composed of 32.3% of rare earth metals (Nd, Pr, Dy), 1% of boron, and 66.7% of iron. It can re-produce 6.8 g of neodymium-iron-boron on average (Nd- This paper size is in accordance with China National Standard (CNS) A4 (210 X 297 mm) 453907 A7 -1 B7___ V. Description of the invention (7)
Fe-B)磁鐵，其相對應於95.8%的收穫量* f)將所獲得具有鈸一鐵一硼（Nd-Fe-B)粉末適當成份之材 (請先閱讀背面之注意事項再填寫本頁) 料予以磨碎’篩選並混合，將其壓成形狀部件.，並且在 所熟知的粉末冶金的製造方式中燒結以製成新的銨一 鐵一硼（Nd-Fe-B)磁鐵。 第2例： 其如上述第1例中，然而具有以下之不同。 此等永久磁鐵的分離直接在脆化處理之後進行，其所 獲得的是顆粒或粉末形狀的材料，其包含至93.8%之磁鐵 合金。 第3例： 此擴音機其包括銳一鐵一硼型的永久磁鐵，是保持在 室溫1巴（bar)之氫氛圍的真空容器中3小時。然後其薄 膜被機械式地去除，並且此擴音機置於一個具有10毫米 (mm)網目寬度的振動篩上振動30分鐘。其被分離的部份 (<5毫米）包括此銳一鐵一硼合金至88.2%。 第4例： 經濟部智慧財產局員工消費合作社印激 一個金屬廢料包括未知比例的鈸一鐵一砸式以及釤一 鈷式的永久磁鐵。此永久磁鐵是黏貼於陶瓷板上。此結 合物體是保持於室溫1巴（bar)的氫氛圍中3小時。在振 動篩上篩選之後，可以從結合物體的一部份將磁鐵完全 的去除。在被篩選的部份之中釤（Sm)的含量<0.3 %且鈸含 量3 2 · 1 %，因此使得將這種磁鐵完全去除是稀有少見- 此留下的具有永久磁鐵的接合板85〇t的1巴（bar)的 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 4S3 9QJ ΑΊ Β7 五、發明說明（方） 氫氣中被燒紅。而室溫中冷卻後，此永久磁鐵從陶瓷板 上去除。一項化學分析顯示，此永久磁鐵完全由釤一鈷 (Sm-Co)磁鐵所構成，而鈸（Nd)的含量<0.1%。 此如此經由再循環所產生的釤一鈷（Sm-Co)磁鐵使得 它容易被磨成粉末。經由調整此種新產生的釤鈷合金使 得它能再度製得完整的釤鈷磁鐵》 在上述例子中的所有百分率的說明是有關其於粉末材 料整個重量中之重量部份。 ----------1 — —— - _ --II - - ---- I ----I (請先聞讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 -10- 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐）Fe-B) magnet, which corresponds to a yield of 95.8% * f) the obtained material with the appropriate composition of Nd-Fe-B powder (please read the precautions on the back before filling in this Page) The material is ground, sieved, mixed, pressed into shaped parts, and sintered in a well-known manufacturing method of powder metallurgy to make a new ammonium-iron-boron (Nd-Fe-B) magnet. Second example: It is the same as in the first example described above, but has the following differences. The separation of these permanent magnets is performed directly after the embrittlement treatment, and the obtained material is a granular or powder-shaped material containing up to 93.8% of the magnet alloy. Third example: This loudspeaker includes a sharp-iron-boron type permanent magnet, and is held in a vacuum container at room temperature in a hydrogen atmosphere of 1 bar for 3 hours. The film was then removed mechanically, and the loudspeaker was placed on a shaker with a mesh width of 10 millimeters (mm) and shaken for 30 minutes. The separated part (< 5 mm) includes this sharp-iron-boron alloy to 88.2%. Example 4: Employees' Cooperatives in the Intellectual Property Bureau of the Ministry of Economic Affairs printed a metal scrap including an unknown proportion of a permanent magnet of 钹 1-iron- 砸 and 钐 -cobalt. This permanent magnet is adhered to a ceramic plate. The combined object was kept in a hydrogen atmosphere at room temperature of 1 bar for 3 hours. After screening on the vibrating screen, the magnet can be completely removed from the part of the bonded object. Among the screened parts, the content of radon (Sm) < 0.3% and radon content 3 2 · 1%, so that it is rare and rare to completely remove such magnets-this left a splice plate with permanent magnets 85 〇t 1 bar (bar) of this paper size applies Chinese National Standard (CNS) A4 specifications (210 X 297 mm) 4S3 9QJ Α7 Β7 5. Description of the invention (square) Burned red in hydrogen. After cooling at room temperature, the permanent magnet was removed from the ceramic plate. A chemical analysis showed that the permanent magnet was composed entirely of rhenium-cobalt (Sm-Co) magnets, and the content of rhenium (Nd) was <0.1%. The Sm-Co magnet produced by recycling this way makes it easy to be ground into powder. By adjusting this newly produced samarium-cobalt alloy so that it can produce a complete samarium-cobalt magnet again, all the percentage descriptions in the above example are related to the weight portion of the entire weight of the powder material. ---------- 1 — ——-_ --II------ I ---- I (Please read the notes on the back before filling out this page) Intellectual Property Bureau, Ministry of Economic Affairs Printed by Staff Consumer Cooperatives-10- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)