JP3451269B2 - Method for separating and recovering valuable resources from composite materials - Google Patents
Method for separating and recovering valuable resources from composite materialsInfo
- Publication number
- JP3451269B2 JP3451269B2 JP27506393A JP27506393A JP3451269B2 JP 3451269 B2 JP3451269 B2 JP 3451269B2 JP 27506393 A JP27506393 A JP 27506393A JP 27506393 A JP27506393 A JP 27506393A JP 3451269 B2 JP3451269 B2 JP 3451269B2
- Authority
- JP
- Japan
- Prior art keywords
- metal
- particles
- belt conveyor
- separating
- metal particles
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 16
- 239000002131 composite material Substances 0.000 title claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 239000002923 metal particle Substances 0.000 claims description 18
- 229910052755 nonmetal Inorganic materials 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 10
- 239000011812 mixed powder Substances 0.000 claims description 3
- 239000011362 coarse particle Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 12
- 229910052802 copper Inorganic materials 0.000 description 12
- 239000010949 copper Substances 0.000 description 12
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 239000000758 substrate Substances 0.000 description 7
- 239000002699 waste material Substances 0.000 description 6
- 239000003365 glass fiber Substances 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910000042 hydrogen bromide Inorganic materials 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 238000010169 landfilling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011802 pulverized particle Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000001612 separation test Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Combined Means For Separation Of Solids (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、産業用電子分野等にお
いて使用されるプリント基板等の金属と非金属から構成
される複合材料（特にその不良品や廃材）からの有価金
属の分離・回収方法に関し、さらに詳しくは上記複合材
料を粉砕して得た異種物質の混合粉末を、粉体粒子の形
状の違いを利用して金属粒子と非金属粒子とに分離し、
それぞれを、または少なくとも一方をリサイクル用有価
物として回収する方法に関するものである。
【０００２】
【従来の技術】一般に、プリント基板としてのガラスエ
ポキシ樹脂基板は、電子産業の中で大量に生産されてお
り、それに伴い製造工程においても廃材や不良品が大量
に発生している。これらの廃材等は素材としてガラス繊
維やプラスチック等の樹脂と、回路パターンとして用い
られた銅、ニッケル、金、銀等の金属とから構成されて
いるため、粉砕しにくい上、樹脂そのものが熱硬化性で
あるため再溶融化が難しいので、リサイクルされないで
埋め立て処分されている場合が多いのが現状である。
【０００３】経済上の理由からプリント基板上に有価物
として高価な銅、ニッケル等が塗布されている場合に
は、それら金属の厚みが30μｍ以上の基板である場合と
か、もっと薄くても、さらに高価な金、銀あるいはパラ
ジウム等の貴金属が塗布されている場合等には、基板表
面をエッチングして金属のみを回収する技術も知られて
いる。
【０００４】しかしながら、上記の回収技術では有価金
属を回収するために排水処理設備が必要となる他、残っ
た基板は埋め立てにするか、焼却するかの方法で処理さ
れていた。この場合、埋め立てしても土壌中でこれらの
樹脂体は腐食しないという性質があり、又、焼却すると
塩化水素、臭化水素、ダイオキシン等の有害ガスを発生
するため処理費用が高くなるという問題があり、根本的
な解決策はなかった。
【０００５】近年、上記廃基板等の複合材を一旦剪断機
で細断した後、さらに粉砕機で粉砕したものを乾式サイ
クロン等で比重分離して選別する方法も知られるように
なったが、金属と樹脂等との分離が不完全であった。
【０００６】
【発明が解決しようとする課題】本発明は、上述従来の
技術の問題点を解決しようとするもので、微細粒径に粉
砕した粒子を特定の選別機にかけることによって、有価
物たる金属成分と樹脂、ガラス繊維等の非金属体成分と
に精度良く分離することを目的とするものである。
【０００７】
【課題を解決するための手段】本発明者等は、斯かる課
題を解決するために鋭意研究した結果、被処理物を０．
８mm以下に粉砕し、単体分離することによって得られた
金属と非金属の展性の差から生ずる産物の形状の違いを
利用して、形状が球に近い有価金属と球から遠い形状の
非金属とに精度よく分離できる方法を見い出し、本発明
法を提供することができたものである。
【０００８】 すなわち本発明は、金属部分と非金属部
分とからなる複合材を剪断破壊して所定の大きさの粗粒
とした後、金属部分と非金属部分とが別々になるまで粉
砕機で粉砕して金属粒子と非金属粒子の混合粉末とし、
次いで該混合粉末を任意の角度に傾斜したベルトコンベ
ア上に連続的に供給し、球状である金属粒子をベルトコ
ンベアの傾斜した側へ、非球状である非金属粒子をベル
トコンベアの進行方向へそれぞれ排出することによって
分離回収することを特徴とする複合材料から有価物を分
離回収する方法に関するものである。
【０００９】
【作用】本発明方法適用の対象となる被処理材として
は、たとえばプリント配線基板があり、ガラスエポキシ
樹脂基板の廃材や切れ端は勿論、その他あらゆる形態の
樹脂体と金属との複合材が全て本発明方法による処理の
対象となり得る。
【００１０】被処理材は先ずシヤー（剪断機）などで約
１cm角以下に切断または粗砕した後、ハンマーミル等の
粉砕機を用いて０．８mm以下に粉砕する。この時展性の
大きい金属部分は球に近い球状の粒子となるのに対し、
プラスチックおよびガラス繊維部は扁平状および針状の
粒子に粉砕される。このようにして得られた粉砕産物
は、有価金属粒子と樹脂粒子との混合体であるため、次
工程で選別機により分離を行なう。
【００１１】この場合、粉砕産物を進行方向に対して直
角の方向に任意の角度で傾斜したベルトコンベア上に連
続的に供給すると、粒子はベルトコンベア上を斜面の下
方へと転がり落ちながら前方へと運ばれ、転がり落ちる
速度が大きいものは手前に、小さいものは前方に、そし
て転がらないものはベルトコンベアの進行方向のヘッド
部に排出される。
【００１２】転がり落ちる速度は、形状が球に近くなる
ほど、あるいは粒子の径が大きくなるほど、また密度が
大きいほど速度が大となることから、これらの特性を有
する金属粒子はより手前に落下し、逆にプラスチックお
よびガラス繊維のほとんどはベルトコンベアのヘッド部
に排出される。
【００１３】この場合、ある大きさの摩擦係数をもった
材質のベルトを選択し、傾斜角度およびベルトスピード
を適切に設定することにより高い精度で金属粒子を非金
属粒子から分離することができるものである。
【００１４】以下実施例をもって詳細に説明するが、本
発明の範囲はこれらに限定されるものではない。
【００１５】
【実施例１】被処理材として両面に銅回路パターンを形
成したガラスエポキシ基板を剪断機で約１cm角程度に剪
断破壊した後、ハンマーミルで０．８mm以下に粉砕し、
各粒子が実質上単一物質からなる粒子となるように単体
分離した。この基板の組成は、銅３０wt％、ガラス繊維
１８wt％、エポキシ樹脂硬化体５２wt％である。その
後、次の選別・分離工程で分離精度が向上するように乾
式分級機を用いて微細な粒子を除去したところ、幸い銅
等の金属は微細になりにくく、この除去される微粒子群
にはほとんど含まれなかった。
【００１６】次いで得られた粉砕粒子を２５度に傾斜し
たベルト幅２５０mm、ベルトスピード１８０mm／秒の速
度で走るベルトコンベア上に連続的に供給し、粉砕工程
で球状になった銅粒子を中心としたものをベルト上を転
がり落としてベルトコンベア側面に設けた産物回収箱に
回収し、非金属粒子をベルトコンベアヘッド部に排出さ
せた。
【００１７】次いで上記工程で得られた金属粒子を中心
とするものを、さらに２０度に傾斜した上記ベルトコン
ベアに再度供給し、混入していた非金属粒子を分離して
純度を高めた。
【００１８】上記工程のベルトコンベアヘッド部には非
金属粒子のほか粒度の小さい銅粒子も混入したため、傾
斜角２５度、ベルトスピード４００mm／秒のベルトコン
ベアで再度選別して銅粒子をベルトコンベア側面に回収
し、前工程で得られた銅粒子と併せて銅の実収率を高め
た。また、ベルトコンベアヘッド部に集まった非金属粒
子は最初の工程のベルトコンベアヘッド部に濃縮させた
粒子群と併せて非金属回収産物とした。
【００１９】一連の工程から得られた金属回収産物およ
び非金属回収産物の２産物の化学分析を行ない、各産物
の品位および実収率を求め、「分離試験結果」として表
１にまとめたが、この結果、銅品位８８％、銅実収率９
５．５％という高い成績が得られた。
【００２０】
【表１】
【００２１】
【発明の効果】上述のように本発明法は簡易な手段によ
って、たとえば廃プリント基板中の有価金属を高純度物
として回収できる他、他の非金属物質も分離回収できる
ため有価金属を再利用できるばかりでなく、回収された
非金属有価物を樹脂構造物等の充填材としても有効利用
できる等、優れた効果を有するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite material composed of a metal and a non-metal such as a printed circuit board used in the field of industrial electronics and the like (especially defective products and Waste material), and more specifically, a method of separating and recovering valuable metals from composite materials obtained by pulverizing the above-mentioned composite material, using a difference in the shape of the powder particles to separate metal particles from non-metal particles. Separated into
The present invention relates to a method for recovering each or at least one of them as valuables for recycling. 2. Description of the Related Art In general, a glass epoxy resin substrate as a printed circuit board is produced in large quantities in the electronics industry, and accordingly, a large amount of waste materials and defective products are produced in the manufacturing process. Since these waste materials are composed of resin such as glass fiber and plastic as materials, and metals such as copper, nickel, gold and silver used as circuit patterns, they are not easily crushed and the resin itself is cured by heat. It is difficult to re-melt due to its nature, and in many cases it is landfilled without being recycled. When expensive printed materials such as copper and nickel are coated on printed circuit boards for economic reasons, the thickness of the metal may be 30 μm or more. When expensive noble metals such as gold, silver or palladium are applied, a technique of etching only the metal by etching the substrate surface is also known. [0004] However, the above-mentioned recovery technique requires a wastewater treatment facility to recover valuable metals, and the remaining substrate is treated by landfilling or incineration. In this case, there is a problem that these resin bodies do not corrode in the soil even when buried, and there is a problem in that incineration generates harmful gases such as hydrogen chloride, hydrogen bromide, and dioxin, thereby increasing the processing cost. Yes, there was no fundamental solution. In recent years, there has been known a method in which a composite material such as the waste substrate is once cut by a shearing machine and then ground by a crusher and separated by specific gravity using a dry cyclone or the like. Separation of metal and resin was incomplete. SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems of the prior art, and it is possible to obtain a valuable material by subjecting particles crushed to a fine particle size to a specific sorter. An object of the present invention is to accurately separate a metal component and a nonmetallic component such as resin and glass fiber. Means for Solving the Problems The inventors of the present invention have conducted intensive studies in order to solve the above-mentioned problems, and as a result, have set the object to be processed to 0.1%.
Utilizing the difference in the shape of the product resulting from the difference in malleability between metal and non-metal obtained by crushing to 8 mm or less and separating the metal into non-metal, valuable metal whose shape is close to a sphere and non-metal whose shape is far from a sphere The present inventors have found a method capable of accurately separating the particles, and have provided the method of the present invention. That is, according to the present invention, after a composite material composed of a metal portion and a non-metal portion is shear-ruptured to obtain coarse particles of a predetermined size, a pulverizer is used until the metal portion and the non-metal portion are separated. Crushed into a mixed powder of metal particles and non-metal particles,
Next, the mixed powder is continuously supplied onto a belt conveyor inclined at an arbitrary angle, the spherical metal particles are moved toward the inclined side of the belt conveyor, and the non-spherical non-metal particles are moved toward the traveling direction of the belt conveyor. The present invention relates to a method for separating and recovering valuable resources from a composite material, which is characterized by separating and recovering by discharging. The material to be processed to which the method of the present invention is applied is, for example, a printed wiring board, and is a composite material of a resin body and a metal in any other form, as well as a waste material or a piece of a glass epoxy resin substrate. Can all be processed by the method of the present invention. The material to be treated is first cut or roughly crushed into about 1 cm square or less by a shear (shear) or the like, and then crushed to 0.8 mm or less using a crusher such as a hammer mill. The metal part with high malleability becomes spherical particles close to a sphere,
The plastic and glass fiber parts are crushed into flat and needle-like particles. Since the pulverized product thus obtained is a mixture of valuable metal particles and resin particles, it is separated by a separator in the next step. In this case, when the pulverized product is continuously supplied onto a belt conveyor inclined at an arbitrary angle in a direction perpendicular to the traveling direction, the particles roll forward on the belt conveyor while falling down on the slope. Those with a high rolling speed are discharged to the front, those with a low rolling speed are discharged to the front, and those that do not roll are discharged to the head in the traveling direction of the belt conveyor. The rolling speed is higher as the shape is closer to a sphere, or as the diameter of the particle is larger, or as the density is higher, so that the metal particles having these characteristics fall forward. Conversely, most of the plastic and glass fibers are discharged to the head of the belt conveyor. In this case, the metal particles can be separated from the non-metal particles with high accuracy by selecting a belt made of a material having a certain coefficient of friction and appropriately setting the inclination angle and the belt speed. It is. Hereinafter, the present invention will be described in detail with reference to Examples, but the scope of the present invention is not limited thereto. Example 1 A glass epoxy substrate having a copper circuit pattern formed on both sides as a material to be treated was sheared and fractured to about 1 cm square by a shearing machine, and then ground to 0.8 mm or less by a hammer mill.
Separation was performed so that each particle was substantially composed of a single substance. The composition of this substrate is 30% by weight of copper, 18% by weight of glass fiber, and 52% by weight of a cured epoxy resin. After that, fine particles were removed using a dry classifier to improve the separation accuracy in the next separation / separation step.Fortunately, metals such as copper were difficult to become fine, and almost no particles were removed. Not included. Next, the obtained pulverized particles are continuously supplied onto a belt conveyor running at a belt width of 250 mm inclined at 25 degrees and a belt speed of 180 mm / sec. The resulting material was rolled down on a belt, collected in a product collection box provided on the side of the belt conveyor, and non-metal particles were discharged to a belt conveyor head. Next, the metal particles mainly obtained in the above step were supplied again to the above-mentioned belt conveyor inclined at 20 degrees, and the mixed non-metal particles were separated to increase the purity. Since non-metallic particles and small-sized copper particles were mixed into the belt conveyor head in the above process, the copper particles were again sorted on a belt conveyor having an inclination angle of 25 degrees and a belt speed of 400 mm / sec to remove the copper particles from the side of the belt conveyor. To increase the actual yield of copper in combination with the copper particles obtained in the previous step. The non-metal particles collected in the belt conveyor head were combined with the particles concentrated in the belt conveyor head in the first step to obtain a non-metal recovered product. Chemical analysis was performed on two products, a metal recovery product and a non-metal recovery product, obtained from a series of steps, and the grade and actual yield of each product were determined. The results are shown in Table 1 as "separation test results". As a result, the copper grade was 88% and the actual copper yield was 9
The result was as high as 5.5%. [Table 1] As described above, according to the method of the present invention, for example, valuable metals in waste printed circuit boards can be recovered as high-purity substances by simple means, and other non-metallic substances can be separated and recovered. Not only can be reused, but also the recovered nonmetallic valuable material can be effectively used as a filler for resin structures and the like, and has excellent effects.
【図面の簡単な説明】
【図１】本発明方法で使用するベルトコンベアの平面図
である。
【図２】図１のＸ−Ｘ線断面概略図である。
【図３】本発明方法のフローシート図である。
【符号の説明】
１ ベルトコンベア
２ 球状産物回収箱
３ 非球状産物回収箱
４ ベルトコンベア進行方向BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a belt conveyor used in the method of the present invention. FIG. 2 is a schematic sectional view taken along line XX of FIG. FIG. 3 is a flow sheet diagram of the method of the present invention. [Description of Signs] 1 Belt conveyor 2 Spherical product collection box 3 Non-spherical product collection box 4 Belt conveyor traveling direction
フロントページの続き (72)発明者 遠藤 茂寿 茨城県つくば市小野川16番３ 工業技術 院 資源環境技術総合研究所内 (72)発明者 大矢 仁史 茨城県つくば市小野川16番３ 工業技術 院 資源環境技術総合研究所内 (72)発明者 泉川 千秋 東京都千代田区丸の内１丁目８番２号 同和鉱業株式会社内 (56)参考文献 特開 平６−246235（ＪＰ，Ａ) 特開 平５−200363（ＪＰ，Ａ) 特開 平４−135676（ＪＰ，Ａ) 特開 昭60−49979（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B07B 1/00 - 15/00 Continued on the front page. (72) Inventor Shigehisa Endo 16-3 Onogawa, Tsukuba, Ibaraki Pref., National Institute of Advanced Industrial Science and Technology (72) Inventor Hitoshi Oya 16-3 Onogawa, Tsukuba, Ibaraki Pref. In the laboratory (72) Inventor Chiaki Izumikawa 1-8-2 Marunouchi, Chiyoda-ku, Tokyo Dowa Mining Co., Ltd. (56) References JP-A-6-246235 (JP, A) JP-A-5-200363 (JP, A) JP-A-4-135676 (JP, A) JP-A-60-49979 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B07B 1/00-15/00
Claims (1)
を剪断破壊して所定の大きさの粗粒とした後、金属部分
と非金属部分とが別々になるまで粉砕機で粉砕して金属
粒子と非金属粒子の混合粉末とし、次いで該混合粉末を
任意の角度に傾斜したベルトコンベア上に連続的に供給
し、球状である金属粒子をベルトコンベアの傾斜した側
へ、非球状である非金属粒子をベルトコンベアの進行方
向へそれぞれ排出することによって分離回収することを
特徴とする複合材料から有価物を分離回収する方法。(57) [Claim 1] A composite material comprising a metal part and a non-metal part is subjected to shear fracture to form coarse particles of a predetermined size, and then the metal part
Pulverize with a pulverizer until the metal
The mixed powder of the particles and the non-metal particles is then supplied continuously onto a belt conveyor inclined at an arbitrary angle, and the spherical metal particles are supplied to the inclined side of the belt conveyor. A method for separating and recovering valuable materials from a composite material, wherein the metal particles are separated and recovered by discharging the metal particles in a traveling direction of a belt conveyor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27506393A JP3451269B2 (en) | 1993-10-06 | 1993-10-06 | Method for separating and recovering valuable resources from composite materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27506393A JP3451269B2 (en) | 1993-10-06 | 1993-10-06 | Method for separating and recovering valuable resources from composite materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07100436A JPH07100436A (en) | 1995-04-18 |
| JP3451269B2 true JP3451269B2 (en) | 2003-09-29 |
Family
ID=17550329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27506393A Expired - Fee Related JP3451269B2 (en) | 1993-10-06 | 1993-10-06 | Method for separating and recovering valuable resources from composite materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3451269B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030084434A (en) * | 2002-04-26 | 2003-11-01 | (주) 거양 | Apparatus for separating metallic balls |
| NZ520369A (en) * | 2002-07-22 | 2005-03-24 | Titanox Dev Ltd | A separation process for producing titanium rich powder from metal matrix composite |
| JP5892670B2 (en) * | 2012-03-28 | 2016-03-23 | 国立研究開発法人産業技術総合研究所 | Magnetic separator |
-
1993
- 1993-10-06 JP JP27506393A patent/JP3451269B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07100436A (en) | 1995-04-18 |
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