JPH06136461A - Method for regenerating metal - Google Patents
Method for regenerating metalInfo
- Publication number
- JPH06136461A JPH06136461A JP28788592A JP28788592A JPH06136461A JP H06136461 A JPH06136461 A JP H06136461A JP 28788592 A JP28788592 A JP 28788592A JP 28788592 A JP28788592 A JP 28788592A JP H06136461 A JPH06136461 A JP H06136461A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- vessel
- melting
- metals
- oxides
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は金属の製造に関するもの
で、特に金属と非金属の混合物を安価に分離精製するこ
とにより、経済的に価値のある形状の製品を製造する方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the production of metals, and more particularly to a method for producing economically valuable products by separating and refining a mixture of metal and non-metal at low cost. .
【０００２】[0002]
【従来の技術】金属屑の再生方法あるいは金属と非金属
の分離精製方法としては、再溶解する方法が最も簡便な
方法である。金属と非金属の混合物を分離精製する方法
は種々知られているが、いずれもその分離精製コストが
大きいことが欠点であった。本発明は極めて安価に分離
精製する方法を提供するものであり、特に希土類金属と
希土類金属酸化物との混合物の分離精製に効果的であ
る。例えば希土類金属のように活性な金属は長時間大気
中に保管していると、金属表面の一部が酸化して金属と
酸化物の混合物となる。この場合の酸化物は金属からみ
ると不純物が混入していることと同じ効果をもたらすの
で、そのままでは使用できない場合が多く分離精製する
必要が生ずる。また金属とスラグの混合物より金属のみ
を回収したい場合も同様である。又、金属の切断片や粉
体が製造工程や機械加工の過程で発生し、これらの金属
を経済的に有用な形状のものに再生する必要が生じる
が、本発明はこのような再生工程にも適用できる。2. Description of the Related Art The method of remelting metal scraps or the method of separating and refining metal and nonmetal is the simplest method. Various methods for separating and refining a mixture of a metal and a nonmetal are known, but all of them have the drawback of high separation and refining costs. INDUSTRIAL APPLICABILITY The present invention provides a method for separating and purifying at extremely low cost, and is particularly effective for separating and purifying a mixture of a rare earth metal and a rare earth metal oxide. For example, when an active metal such as a rare earth metal is stored in the air for a long time, a part of the metal surface is oxidized and becomes a mixture of metal and oxide. Since the oxide in this case has the same effect as that of impurities mixed in from the viewpoint of metal, it cannot be used as it is, and it is necessary to separate and purify it in many cases. The same applies when it is desired to recover only the metal from the mixture of the metal and the slag. Further, metal cut pieces and powders are generated in the manufacturing process and machining process, and it is necessary to regenerate these metals into economically useful shapes. Can also be applied.
【０００３】[0003]
【発明が解決しようとする課題】このような場合は金属
のみ又はスラグのみを回収することが必要になるが、こ
の時に経済的に成立つ条件として回収した金属又はスラ
グの経済的な価値よりも、回収コストが少ないことが条
件になる。金属を回収する場合も単に再溶解しただけで
は足りず、次の加工に便利な形状になっていることが要
求される。従って回収する金属が高価な金属は従来の方
法で回収することが経済的に可能であるが、回収する金
属が比較的安価な場合は、回収した金属の価格よりも金
属の回収費用が高くなるので経済的に成立たない為に、
そのまま放置又は破棄されることになる。本発明はこの
ような問題を解決して、安価に有用な金属又は化合物
（スラグ）を再生し、回収する技術的解決方法を提供す
るものである。In such a case, it is necessary to recover only the metal or the slag, but the economical value of the recovered metal or the slag is more important than the economical value of the condition that can be economically established at this time. The condition is that the recovery cost is low. When recovering metal, it is not enough to simply remelt it, and it is required that it has a shape convenient for the next processing. Therefore, it is economically possible to recover metals that are expensive to recover by conventional methods, but if the metals to be recovered are relatively inexpensive, the cost of recovering the metals will be higher than the cost of the recovered metals. Because it is not economically feasible,
It will be left as it is or discarded. The present invention solves such problems and provides a technical solution for regenerating and recovering a useful metal or compound (slag) at low cost.
【０００４】[0004]
【課題を解決するための手段】金属とスラグ等の混合物
より安価に金属とスラグ等を分離精製でき、同時に金属
を再生することができる本発明の方法について説明す
る。金属と非金属の混合物を竪型の溶解容器に入れる。
この場合溶解容器の形状は必ずしも制限はないが、外部
加熱手段や再生後の加工を考慮すると円筒状が最も好ま
しい。簡単に説明する為に一応この形状であるとして説
明する。又容器の材料は金属又はスラグ等の双方の融点
以上に耐える材料であることが必要である。この溶解容
器の材料の一例としてＳＵＳ製の溶解容器を採用した例
で説明する。もちろん溶解容器の内側を耐火材でライニ
ングしたものでも良い。溶解容器内側はわずかにテーパ
ーを付けておくと抜取りに便利である。この混合物を入
れた円筒状のＳＵＳ容器の外側に、円筒状のヒーターを
配置する。このヒーター温度を、ＳＵＳ容器に入れた金
属の融点以上に維持する。A method of the present invention will be described, which is capable of separating and refining metal and slag and the like at a lower cost than a mixture of metal and slag and regenerating the metal at the same time. A mixture of metal and non-metal is placed in a vertical melting vessel.
In this case, the shape of the melting container is not necessarily limited, but a cylindrical shape is most preferable in consideration of external heating means and processing after regeneration. For the sake of simplicity, the description will be given assuming that this shape is used. Further, the material of the container needs to be a material that can withstand the melting point of both metals or slag. As an example of the material of the melting container, an example in which a SUS melting container is adopted will be described. Of course, the inside of the melting vessel may be lined with a refractory material. It is convenient to draw out if the inside of the melting vessel is slightly tapered. A cylindrical heater is placed outside the cylindrical SUS container containing this mixture. This heater temperature is maintained above the melting point of the metal contained in the SUS container.
【０００５】すると加熱帯の原料が溶融し、通常非金属
は融点が高く比重は小さいので溶融金属上部に浮上し、
溶融帯下部は清浄な金属のみとなる。この状態を保ちな
がら外熱炉を徐々に上方に移動させる。溶融帯は上々に
移動し、下部の金属層は外熱炉の加熱ゾーンから外れる
ので徐々に凝固し、清浄な金属インゴットが得られる。Then, the raw material of the heating zone is melted, and usually the nonmetal has a high melting point and a small specific gravity, so that it floats above the molten metal.
The lower part of the melting zone contains only clean metal. While maintaining this state, the external heating furnace is gradually moved upward. The melting zone moves upward, and the lower metal layer separates from the heating zone of the external heating furnace, so that it gradually solidifies and a clean metal ingot is obtained.
【０００６】外熱炉が最上部に持上がった時点では非金
属が集まり、そのまま冷却すればたとえばスラグのイン
ゴットが得られ、バラストとして再利用できるようにな
る。又、溶解容器下部には金属インゴットが得られ、冷
却後容器を反転すれば円柱状の金属が得られ、以後の切
削、圧延加工に付すことができる。When the external heating furnace is lifted to the uppermost portion, non-metals gather, and if cooled as it is, an ingot of slag, for example, can be obtained and can be reused as ballast. Further, a metal ingot is obtained in the lower portion of the melting container, and a columnar metal is obtained by reversing the container after cooling, which can be subjected to subsequent cutting and rolling.
【０００７】純度の低い原料を処理する場合、融点が低
く粘性の小さい精錬効果の大きいフラックスをあらかじ
め加えておくのも有効である。このようなフラックスと
してはＣａＯ、Ａｌ2 Ｏ3 、ＣａＦ2 等を含む組成物か
ら目的に応じて選択することができる。When processing a raw material having a low purity, it is also effective to add a flux having a low melting point and a low viscosity and a high refining effect in advance. Such a flux can be selected from a composition containing CaO, Al 2 O 3 , CaF 2, etc. according to the purpose.
【０００８】又高温で酸化しやすい活性金属の精製に
は、混合物を入れた容器の上方を真空ポンプに接続する
等の処置により溶解容器内を真空にして、同様の操作に
より酸化反応を防止しながら分離精製することも可能で
ある。あるいは不活性雰囲気にしてもよい。つまり本発
明により酸化しやすい活性金属の精製も簡単にすること
が出来るのである。たとえばミッシュメタルやサマリウ
ム、ネオジム等の希土類金属、アルミニウム、マグネシ
ウム、チタニウム等の酸化し易い金属の回収処理に有効
である。又本発明は金属の粉体または粉体と切断片等よ
り固形の金属を回収する方法としても有効であり、特に
活性金属の金属回収方法としても効果的である。In order to purify the active metal which is easily oxidized at high temperature, the inside of the melting vessel is evacuated by a procedure such as connecting the upper part of the vessel containing the mixture to a vacuum pump, and the oxidation reaction is prevented by the same operation. However, it is also possible to separate and purify. Alternatively, an inert atmosphere may be used. That is, according to the present invention, the purification of the active metal which is easily oxidized can be simplified. For example, it is effective for recovering rare earth metals such as misch metal, samarium, and neodymium, and metals that are easily oxidized such as aluminum, magnesium, and titanium. The present invention is also effective as a method for recovering solid metal from metal powder or powder and cut pieces, and is particularly effective as a method for recovering active metal.
【０００９】[0009]
【作用】本発明はゾーンメルティング方式を活用して、
金属と非金属の混合物原料を溶融し、非金属を浮上分離
させながら徐々に溶融ゾーンを上方に移動させ、下部に
清浄な金属インゴットを得るものである。The present invention utilizes the zone melting system to
The raw material for the mixture of metal and nonmetal is melted, and the nonmetal is floated and separated while gradually moving upward in the melting zone to obtain a clean metal ingot at the bottom.
【００１０】[0010]
実施例１ 金属と酸化物の混合物より金属を分離精製し回収した例 本発明に使用する設備の一例を図１に示した。図１にお
いて、溶解容器（１）として既製のＳＵＳ管を用いて内
部にテーパー加工を施し、下方を溶接密閉化して上部は
取外し可能なフランジ（３）を作成して耐熱パッキン
（２）で真空もれを防ぎ、かつ上部から真空ポンプ
（５）により吸引することにより溶解容器（１）内を真
空で使用できるようにした。フランジ（３）の上部には
真空計（４）を取付け、溶解容器の中の真空度がチェッ
クできるようにした。この溶解容器（１）の一部が加熱
できるように管状の外熱炉（６）を取付け、この中央部
分に溶解容器（１）の反応部分の温度が測定できるよう
に熱電対（８）を設置した。熱電対（８）で検出した温
度により、外熱炉（６）のヒーター（７）を制御して反
応部分の温度を一定に維持できるようにした。管状の外
熱炉（６）をリフター支持台（９）にのせ、リフターは
自動的にモーターで昇降できるようにした。Example 1 Example in which metal was separated and purified from a mixture of metal and oxide and recovered An example of equipment used in the present invention is shown in FIG. In FIG. 1, a ready-made SUS pipe is used as the melting container (1), the inside is tapered, the lower part is welded and hermetically sealed, and the upper part is formed with a removable flange (3). Leaking was prevented and the inside of the dissolution vessel (1) could be used in vacuum by suctioning from above with a vacuum pump (5). A vacuum gauge (4) was attached to the upper part of the flange (3) so that the degree of vacuum in the melting vessel could be checked. A tubular external heating furnace (6) is attached so that a part of the melting vessel (1) can be heated, and a thermocouple (8) is attached to the central part so that the temperature of the reaction part of the melting vessel (1) can be measured. installed. The heater (7) of the external heating furnace (6) was controlled by the temperature detected by the thermocouple (8) so that the temperature of the reaction part could be kept constant. The tubular external heating furnace (6) was placed on the lifter support base (9) so that the lifter could be automatically moved up and down by a motor.
【００１１】溶解容器（１）の形状は、精製回収後のミ
ッシュメタルの要求形状に合せてほぼ直径１００ｍｍの
円柱状になるようにＳＵＳ管で作成した。図１の装置を
使用して溶解容器（１）の上部のフランジ（３）をはず
して、ＳＵＳ管でできた溶解容器（１）の中に表面と内
部の一部が酸化したミッシュメタル、つまりミッシュメ
タル金属とその酸化物の混合物を入れた。その後に溶解
容器（１）の上部に耐熱パッキン（２）とフランジ
（３）を取付けて真空ポンプ（５）により真空に吸引し
た。真空度を確認した後に外熱炉（６）の温度を昇温さ
せて７５０℃で１時間保持した後、１時間当たり２０ｃ
ｍの速さで外熱炉（６）を上昇させた。又真空度は−７
５０ｍｍ／Ｈｇ以下に保持した。外熱炉（６）の上部が
溶解容器（１）の上部まで到達した時点で１時間保持し
た後に外熱炉（６）のヒーター（７）を切り放冷した。The shape of the melting vessel (1) was made by a SUS tube so as to have a cylindrical shape with a diameter of about 100 mm in accordance with the required shape of the misch metal after purification and recovery. Using the apparatus of FIG. 1, the upper flange (3) of the melting vessel (1) was removed, and inside the melting vessel (1) made of SUS pipe, a misch metal whose surface and part of the inside were oxidized, that is, A mixture of mischmetal metal and its oxide was added. After that, a heat-resistant packing (2) and a flange (3) were attached to the upper portion of the melting container (1), and a vacuum pump (5) was used to draw a vacuum. After confirming the degree of vacuum, the temperature of the external heating furnace (6) was raised and held at 750 ° C. for 1 hour, and then 20 c per hour.
The external heating furnace (6) was raised at a speed of m. The vacuum degree is -7
It was maintained at 50 mm / Hg or less. When the upper part of the external heating furnace (6) reached the upper part of the melting vessel (1), it was held for 1 hour and then the heater (7) of the external heating furnace (6) was cut off and allowed to cool.
【００１２】この後上部のフランジ（３）を取外した後
にＳＵＳ管でできた溶解容器（１）を転倒させインゴッ
トを取出した。インゴットは下方にミッシュメタルが、
上方は酸化物がきれいに分離して析出していた。下方に
析出したインゴットを切断して調査したが酸化物は検出
されず、きれいなミッシュメタルになって回収された。
又回収したミッシュメタルは次工程の要求形状である円
柱状になっているのでそのまま切削加工用に使用でき
た。After that, the upper flange (3) was removed, and then the melting vessel (1) made of SUS pipe was turned over and the ingot was taken out. The ingot has a misch metal below
Oxides were clearly separated and deposited in the upper part. The ingot deposited on the lower side was cut and investigated, but no oxide was detected and it was recovered as clean misch metal.
Further, the recovered misch metal has a cylindrical shape which is a required shape for the next step, and thus can be used as it is for cutting.
【００１３】実施例２ スラグと金属の混合物から金属を分離精製して金属を再
生回収した例 図１の装置を用いて上部のフランジ（３）をはずして溶
解容器（１）の中にスラグとＮｄ−Ｆｅ合金の混合物を
入れた。その後に溶解容器（１）の上部に耐熱パッキン
（２）とフランジ（３）を取付けて真空ポンプ（５）に
より真空に吸引した。真空度を確認した後、外熱炉
（６）の温度を昇温させて８５０℃で１時間保持した後
に１時間当たり１０ｃｍの速さで外熱炉（６）を上昇さ
せた。又真空度は−７４０ｍｍ／Ｈｇ以下に保持した。
外熱炉（６）の上部が溶解容器（１）の上部まで到達し
た時点で１時間保持した後、外熱炉（６）のヒーター
（７）を切り放冷した。この後上部のフランジ（３）を
取外し、溶解容器（１）を転倒させインゴットを取出し
た。インゴットは下方にＮｄ−Ｆｅ合金が、上方にスラ
グがきれいに分離して析出していた。下方に析出したイ
ンゴットを切断して調査したがスラグは検出されず、き
れいなＮｄ−Ｆｅ合金になって回収された。Example 2 Example of separating and refining metal from a mixture of slag and metal to regenerate and recover the metal Using the apparatus of FIG. 1, the upper flange (3) was removed and the slag was placed in the melting vessel (1). A mixture of Nd-Fe alloys was added. After that, a heat-resistant packing (2) and a flange (3) were attached to the upper portion of the melting container (1), and a vacuum pump (5) was used to draw a vacuum. After confirming the degree of vacuum, the temperature of the external heating furnace (6) was raised and held at 850 ° C. for 1 hour, and then the external heating furnace (6) was raised at a speed of 10 cm per hour. The degree of vacuum was kept at -740 mm / Hg or less.
When the upper part of the external heating furnace (6) reached the upper part of the melting vessel (1), it was held for 1 hour, and then the heater (7) of the external heating furnace (6) was cut and allowed to cool. After this, the upper flange (3) was removed, the melting container (1) was tumbled, and the ingot was taken out. In the ingot, the Nd-Fe alloy was deposited in the lower part and the slag was deposited in the upper part. The ingot deposited on the lower side was cut and investigated, but no slag was detected and it was recovered as a clean Nd-Fe alloy.
【００１３】参考例 活性な金属の粉体と切断片より金属を再生した例 Ｎｄ−Ｆｅ合金のような活性な金属の粉体または小さな
切断片は、そのまま溶融しても急激に燃焼して金属の回
収はできない。このようなものも本発明の利用により下
記のように回収可能となる。図１の装置を用いて上部の
フランジ（３）をはずして溶解容器（１）の中にＮｄ−
Ｆｅ合金の粉体又は小さな切断片を入れた。その後に溶
解容器（１）の上部に耐熱パッキン（２）とフランジ
（３）を取付けて真空ポンプ（５）により真空に吸引し
た。真空度を確認した後に外熱炉（６）の温度を昇温さ
せて９００℃で１時間保持した後に１時間当たり３０ｃ
ｍの速さで外熱炉（６）を上昇させた。又真空度は−７
４０ｍｍ／Ｈｇ以下に保持した。外熱炉（６）の上部が
溶解容器（１）の上部まで到達した時点で外熱炉（６）
のヒーター（７）を切り放冷した。この後上部のフラン
ジ（３）を取外した後に、溶解容器（１）を転倒させイ
ンゴットを取出した。下方に析出した金属を切断して調
査したが粉体等は検出されず、きれいなＮｄ−Ｆｅ合金
メタルになって回収された。Reference Example Example of Regenerating Metal from Powder of Active Metal and Cut Pieces Powder of active metal such as Nd-Fe alloy or small cut pieces burns rapidly even if they are melted as they are. Cannot be collected. Such materials can be recovered as described below by using the present invention. Using the apparatus of FIG. 1, remove the upper flange (3) and place Nd- in the dissolution vessel (1).
A powder of Fe alloy or a small cut piece was put therein. After that, a heat-resistant packing (2) and a flange (3) were attached to the upper portion of the melting container (1), and a vacuum pump (5) was used to draw a vacuum. After confirming the degree of vacuum, the temperature of the external heating furnace (6) was raised and held at 900 ° C. for 1 hour, and then 30 c per hour.
The external heating furnace (6) was raised at a speed of m. The vacuum degree is -7
It was maintained at 40 mm / Hg or less. When the upper part of the external heating furnace (6) reaches the upper part of the melting vessel (1), the external heating furnace (6)
The heater (7) was cut off and allowed to cool. After removing the upper flange (3), the melting container (1) was turned over and the ingot was taken out. The metal deposited below was cut and investigated, but no powder or the like was detected, and it was recovered as a clean Nd-Fe alloy metal.
【００１４】[0014]
【発明の効果】実施例に反応例の一部を示したが、本発
明を採用することにより以下のような優れた効果を得る
ことができる。 １）金属等の再生利用に要する費用が、従来法に比較し
て大変安価である。 ２）金属等の再生利用に要する設備が簡単で安価であ
る。 ３）従来の再生法では有効利用方法がなかった比較的安
価な金属も、経済合理性にあった再生利用が可能にな
る。 ４）再生利用の為の設備の操作が簡単である。 ５）比較的少量でも経済的に再生できる。 ６）従来法では再生方法が難しかった活性金属の再生が
できる。Although some of the reaction examples are shown in the examples, the following excellent effects can be obtained by adopting the present invention. 1) The cost required for recycling metal or the like is very low as compared with the conventional method. 2) The equipment required for recycling metal is simple and inexpensive. 3) Reusable metals that are economically rational can be reused even for relatively inexpensive metals that could not be effectively used by conventional recycling methods. 4) Easy operation of equipment for recycling. 5) It can be economically regenerated with a relatively small amount. 6) It is possible to regenerate the active metal, which was difficult in the conventional method.
【図１】本発明を実施するための具体的な装置の一例を
示す図である。FIG. 1 is a diagram showing an example of a specific apparatus for carrying out the present invention.
１ 溶解容器 ２ 耐熱パッキン ３ 上部フランジ ４ 真空計 ５ 真空ポンプ ６ 外熱炉 ７ ヒーター ８ 熱電対 ９ リフター支持台 １０ リフター昇降部分 １１ 金属非金属混合物 １２ 溶融金属層 １３ 非金属浮上物層 １４ 凝固回収金属 1 Melting Container 2 Heat Resistant Packing 3 Upper Flange 4 Vacuum Gauge 5 Vacuum Pump 6 External Heat Furnace 7 Heater 8 Thermocouple 9 Lifter Support 10 Lifter Lifting Part 11 Metal Non-Metal Mixture 12 Molten Metal Layer 13 Non-Metal Floating Material Layer 14 Coagulation Recovery metal
Claims (2)
入れ、溶解容器の外側に配置した可動性外熱炉によりの
装入物を加熱溶解させ、外熱炉を時間経過とともに徐々
に上方に引上げつつ溶解帯を移動させながら金属と非金
属を比重差を用いて分離すると同時に、金属塊を得るこ
とを特徴とする金属の再生方法。1. A mixture of a metal and a non-metal is placed in a vertical melting vessel, a charge is charged and melted by a movable external heating furnace arranged outside the melting vessel, and the external heating furnace is gradually heated over time. A method for regenerating a metal, characterized in that a metal lump is obtained at the same time as separating a metal and a non-metal by using a difference in specific gravity while moving a melting zone while pulling upward.
特徴とする請求項１記載の金属の再生方法。2. The method for regenerating a metal according to claim 1, wherein the metal is a rare earth metal or an alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28788592A JPH06136461A (en) | 1992-10-26 | 1992-10-26 | Method for regenerating metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28788592A JPH06136461A (en) | 1992-10-26 | 1992-10-26 | Method for regenerating metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06136461A true JPH06136461A (en) | 1994-05-17 |
Family
ID=17722988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28788592A Pending JPH06136461A (en) | 1992-10-26 | 1992-10-26 | Method for regenerating metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06136461A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6960240B2 (en) | 2001-07-10 | 2005-11-01 | Shin-Etsu Chemical Co., Ltd. | Remelting of rare earth magnet scrap and/or sludge, magnet-forming alloy, and sintered rare earth magnet |
| US7175888B2 (en) | 2004-03-03 | 2007-02-13 | General Electric Company | Mischmetal oxide TBC |
| JP2018109231A (en) * | 2016-12-29 | 2018-07-12 | 有研稀土新材料股▲フン▼有限公司 | Rare earth metal and method for purifying the same |
-
1992
- 1992-10-26 JP JP28788592A patent/JPH06136461A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6960240B2 (en) | 2001-07-10 | 2005-11-01 | Shin-Etsu Chemical Co., Ltd. | Remelting of rare earth magnet scrap and/or sludge, magnet-forming alloy, and sintered rare earth magnet |
| US7204891B2 (en) | 2001-07-10 | 2007-04-17 | Shin-Etsu Chemical Co., Ltd. | Remelting of rare earth magnet scrap and/or sludge, magnet-forming alloy, and sintered rare earth magnet |
| US7175888B2 (en) | 2004-03-03 | 2007-02-13 | General Electric Company | Mischmetal oxide TBC |
| US7229705B1 (en) | 2004-03-03 | 2007-06-12 | General Electric Company | Mischmetal oxide TBC |
| JP2018109231A (en) * | 2016-12-29 | 2018-07-12 | 有研稀土新材料股▲フン▼有限公司 | Rare earth metal and method for purifying the same |
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