JP2004081965A

JP2004081965A - Non-magnetic metal separating apparatus

Info

Publication number: JP2004081965A
Application number: JP2002245448A
Authority: JP
Inventors: Kanji Kuniyone; 国米　寛治; Nobuaki Oniki; 鬼木　信章
Original assignee: Nippon Magnetic Dressing Co
Current assignee: Nippon Magnetic Dressing Co
Priority date: 2002-08-26
Filing date: 2002-08-26
Publication date: 2004-03-18

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-magnetic metal separating apparatus enabling efficient separation of non-magnetic metal in a raw material regardless of the content rate of the non-magnetic metal in the raw material even when the amount of the raw material to be treated is large. <P>SOLUTION: The apparatus is provided with a cylindrical body 11 of a non-magnetic, non-conductive material with a round cross-section, a high-speed rotary magnet 13 eccentrically arranged at an upper position within the body 11 and positioned with a slight gap G between itself and an upper part of an inner wall 12 of the body 11, and a belt conveyer 15 for feeding the raw material 14 to a position above the body 11. A driven roller 19 of the conveyer 15 on its raw material discharging side is made of a non-magnetic, and non-conductive material. The driven roller 19 is located above the body 11 and is arranged on this side of a perpendicular m passing through an axis T of the cylindrical body 11 in the raw material carrying direction. The conveyer 15 is provided with a guiding member 17 of the non-magnetic, non-conductive material on the raw material discharging side, and the member 17 guides the discharged material 14 to the upper part of the body 11 and prevents dropping of the material 14 in the opposite direction of the raw material carrying direction. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば、アルミニウムや銅等の有用な非磁性金属を含む原料から非磁性金属を分離するために使用する非磁性金属分離装置に関する。
【０００２】
【従来の技術】
従来、例えば、非磁性金属であるアルミニウムや銅等を含む廃棄物（原料）から、有用な非磁性金属を再利用することを目的に、非磁性金属を磁気的に分離するために用いる非磁性金属分離装置として、特開昭５７−１１９８５６号公報や特許第３２３０２５３号公報に記載された形態のものが知られている。なお、この種の分離装置においては、移動磁界中に原料を通して電磁誘導力により非磁性金属を分離するものである。
特開昭５７−１１９８５６号公報に記載された装置においては、非磁性材料からなって互いに逆方向に回転する一対の回転筒体が所定の間隔を開けて配置され、かつ一対の回転筒体内には回転筒体と逆方向に回転し、表面に軸方向に並設した複数個の磁極を有する回転磁石が内蔵されており、回転筒体の対向部近傍に向かって非磁性金属を含む原料を供給する振動フィーダー及び振動フィーダーに連接し、かつ傾斜して配置された案内板が配置され、しかも、下側の回転磁石は回転筒体に対して偏心して配置された構成となっている。
一方、特許第３２３０２５３号公報に記載された装置は、一端部で駆動ローラに、他端部で非磁性材料からなる筒体に巻回される搬送ベルトと、筒体内に同軸又は偏心して内蔵され、筒体より高速で回転駆動される回転磁石とを備えており、筒体の下方で該筒体の排出側端部より駆動ローラ側に偏倚して従動ローラが配設され、従動ローラにも搬送ベルトが巻回された構成となっている。
【０００３】
【発明が解決しようとする課題】
しかしながら、前記従来の非磁性金属分離装置においては、未だ解決すべきそれぞれ以下のような問題があった。
特開昭５７−１１９８５６号公報に記載された装置においては、原料中の非磁性金属が、振動フィーダーから供給されて案内板の先端から下側の回転筒体の上部の円弧部の表面に落下するが、この際、落下する位置（回転筒体の周方向）や落下の後の跳ね上がりの如何では、回転磁石による電磁誘導力（分離力）の作用にもかかわらず、非磁性金属が回転磁石の回転方向と逆の方向、即ち、原料中の非金属や、原料に微少に含まれる可能性のある磁性金属と同じ方向に飛翔して正確な分離が行われないことが生じた。特に、案内板の先端から下側の回転筒体の上部の円弧部の表面までの落下距離が大きく、処理する原料が多く、しかも原料中の非磁性金属の割合も多く、回転筒体の外径が小さく、回転磁石の磁力（磁束密度）が小さい場合には、問題が大きかった。この結果、製品の純度が低下するという問題があった。
一方、特許第３２３０２５３号公報に記載された装置においては、回転磁石の磁束により非磁性金属（アルミニウム屑）は上方向の反発力を受けて、筒体の略最上端部から放物線を描いて排出されるが、この際、搬送ベルトにより搬送されたアルミニウム屑と非金属や磁性金属が十分にほぐされていない場合には、アルミニウム屑の分離が十分に行われないことになり、回収されたアルミニウム屑中に非金属が含まれ、回収された非金属側にアルミニウム屑が混在しており、それぞれ再利用する点で問題があった。
【０００４】
本発明はこのような事情に鑑みてなされたもので、処理する原料の量が多くても、原料中の非磁性金属の割合に関係なく、効率良く原料中の非磁性金属を分離できる非磁性金属分離装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
前記目的に沿う第１の発明に係る非磁性金属分離装置は、所定の外周速度で回転し、非磁性かつ非導電性材料からなる断面円形の筒体と、筒体内の上部位置に偏心して配置され、筒体の内壁上部とは僅少の隙間を有して配置され、周方向に隣り合って異なる磁極を交互に有し、高速で回転する回転磁石と、筒体の上位置に選別しようとする原料を供給するベルトコンベアとを有し、ベルトコンベアの原料排出側の従動ローラが非磁性かつ非導電性材料からなって、筒体の軸心に平行に配置され、その直径が筒体の直径より小さく、更に筒体の上位置であって、筒体の軸心を通る垂線を基準として原料搬送方向に対して手前側に配置され、そして、ベルトコンベアの原料排出側には、ベルトコンベアから排出された原料を筒体の上部に案内し、しかも、排出された原料が原料搬送方向とは逆方向に落下するのを防止する非磁性かつ非導電性材料からなるガイド部材が設けられている。これによって、筒体の直径より小さいベルトコンベアの従動ローラが、筒体の上位置で筒体の軸心を通る垂線を基準として原料搬送方向に対して手前側に配置され、また、ガイド部材が筒体の軸心を通る垂線を基準として原料搬送方向に対して手前側に配置されて、ベルトコンベアから排出された原料を筒体の上部に案内し、原料が原料搬送方向とは逆方向に落下するのを防止することができるので、ベルトコンベアから排出される全ての原料を確実に、かつ滑らかに回転磁石の電磁誘導力が作用する領域に供給することができる。
【０００６】
第１の発明に係る非磁性金属分離装置において、従動ローラ及びこれに続くガイド部材を、筒体に対して相対的に上下調整可能に配置することもできる。これによって、原料の条件や搬送速度、回転磁石の磁束密度や回転速度等に応じて、従動ローラの高さ位置やガイド部材の傾きを変えることにより、ベルトコンベアから排出される全ての原料を確実に、かつ滑らかに回転磁石の電磁誘導力が作用する領域に供給することができる。
第１の発明に係る非磁性金属分離装置において、ガイド部材の原料搬送路は水平に対して±３０度以内の範囲にあって、しかも、ガイド部材の原料排出端は、筒体の軸心を通る垂線より原料搬送方向手前側に配置することもできる。これによって、ベルトコンベアから排出される全ての原料を確実に、しかも、より滑らかに回転磁石の電磁誘導力が作用する領域に供給することができる。ガイド部材の原料搬送路を水平に対して±３０度以内としたのは、＋３０度を超えると原料がガイド部材から筒体に落ちる際の衝撃が大きくなり、それにより筒体上で散乱し易くなり、一方、−３０度未満では原料がガイド部材から筒体に滑らかに供給されることが困難となるためである。
【０００７】
前記目的に沿う第２の発明に係る非磁性金属分離装置は、所定の外周速度で回転し、非磁性かつ非導電性材料からなる断面円形の筒体と、筒体内の上部位置に偏心して配置され、筒体の内壁上部とは僅少の隙間を有して配置され、周方向に隣り合って異なる磁極を交互に有し、高速で回転する回転磁石と、筒体の上位置に選別しようとする原料を供給するベルトコンベアとを有し、ベルトコンベアの原料排出側の従動ローラが非磁性かつ非導電性材料からなって、筒体の軸心に平行に配置され、その直径が筒体の直径より小さく、更に筒体の上位置であって、筒体の軸心を通る垂線を基準として原料搬送方向に対して手前側に配置され、そして、筒体の外表面にはベルトコンベアから排出される原料の後方落下を防止する多数の線状又は点状の落下防止用突起を設けることもできる。これによって、筒体の直径より小さいベルトコンベアの従動ローラが筒体の上位置で筒体の軸心を通る垂線を基準として原料搬送方向に対して手前側に配置され、また、筒体の外表面には多数の線状又は点状の落下防止用突起が設けられているので、ベルトコンベアから排出される原料の後方落下を確実に防止すると共に、原料を回転磁石の電磁誘導力が作用する領域に供給することができる。ここで、線状又は点状の落下防止用突起の形状として、筒体の軸心方向に見て断面が台形で、しかも上辺が底辺より短くされ、これにより、筒体の回転速度を大きくした場合でも、落下防止用突起による原料の持ち込みを少なくして、分離の効率を高めるように構成することもできる。
【０００８】
第２の発明に係る非磁性金属分離装置において、落下防止用突起は高さを５〜１０ｍｍの範囲にすることもできる。これによって、原料の落下防止をより効果的に行うことができると共に、回転磁石による分離効果も向上することができる。ここで、落下防止用突起の高さを５〜１０ｍｍの範囲にしたのは、５ｍｍ未満では、落下を防止することができず、一方、１０ｍｍを超えると速い速度の落下防止用突起によって、はね飛ばし現象が生じ、分離能力が低下するためである。
【０００９】
前記目的に沿う第３の発明に係る非磁性金属分離装置は、原料搬出側端部に設けられた小径の従動ローラによってガイドされる搬送ベルトを有し、しかも、従動ローラの手前側近傍に位置する搬送ベルトの直下には空間部を有するベルトコンベアと、空間部に配置され、搬送ベルトとは僅少の隙間を有し、周方向に隣り合って異なる磁極を交互に有し、高速で回転する回転磁石とを有し、ベルトコンベアで搬送された原料中の非磁性金属を回転磁石で飛翔分離させる。これによって、原料中に磁性金属があった場合、磁性金属が回転磁石に吸引されて、搬送ベルトの強磁場位置に保持されるのを、強制的に徐々に離し、この結果、分離後の原料中の磁性金属が従動ローラの下流側の搬送ベルトに付着することを防止できる。
【００１０】
第３の発明に係る非磁性金属分離装置において、回転磁石の外側には非磁性かつ非導電性材料からなる筒体が隙間を有して配置され、しかも回転磁石は、筒体の軸心に対して同軸又は偏心して配置することもできる。これによって、搬送ベルト上の原料と回転磁石との距離を一定に維持できると共に、搬送ベルトと回転磁石との干渉を回避することができる。
第３の発明に係る非磁性金属分離装置において、従動ローラの下位置にはリターンローラが設けられて、従動ローラによってガイドされた後の搬送ベルトを、従動ローラの位置から下方であって従動ローラの搬送ベルトの最終当接位置を通る垂線を基準にして、回転磁石に対して反対側で垂線に対して０〜３０度の方向に指向させることもできる。これによって、仮に原料中に微少の磁性金属（例えば、鉄分）が含まれていても、非磁性金属が除去されて搬送ベルトによって送られる原料（原料滓）によって下流側に押し流され、搬送ベルトに留まることがない。ここで、垂線に対して０〜３０度の方向に指向させるのは、０度未満では、磁性金属が搬送ベルトに留まり易くなり、一方、３０度を超えると、飛翔分離が困難となるためである。
第３の発明に係る非磁性金属分離装置において、従動ローラとリターンローラでガイドされる搬送ベルトの一部にも回転磁石が近接し、搬送ベルトに沿って落下する原料中の非磁性金属を飛翔分離することもできる。これによって、従動ローラを過ぎて搬送ベルトに沿って落下する原料に再度回転磁石による磁場が働く。
【００１１】
前記目的に沿う第４の発明に係る非磁性金属分離装置は、搬送ベルトを実質的に水平又は水平に対して０度を超え２０度以内の下り勾配に保持する駆動ローラ、及び従動ローラとして作用する筒体、並びに筒体の下位置に配置された小径のリターンローラを備え、筒体の内部には高速回転する回転磁石が設けられた非磁性金属分離装置において、筒体とリターンローラとの間にガイドローラを配置し、搬送ベルトが筒体に接する角度を１０〜８０度の範囲に制限している。これによって、水平又は水平に対して０度を超え２０度以内の下り勾配に保持された搬送ベルトが、角度を１０〜８０度の範囲で筒体に接しているので、原料中の非磁性金属と原料滓との分離が効率よく行える。ここで、搬送ベルトの下り勾配を水平又は水平に対して０度を超え２０度以内としたのは、水平を超えて上り勾配とすると、非磁性金属の飛翔距離が短くなり、一方、２０度を超えた下り勾配とすると、電磁誘導力に対して重力の影響が大きくなり、分離効率が低下するためである。さらに、搬送ベルトが筒体に接する角度を１０〜８０度の範囲にしたのは、１０度未満であれば、電磁誘導力が小さ過ぎて分離の効果が小さく、一方、８０度を超えると、電磁誘導力の効果が飽和するためである。
【００１２】
第１〜第３の発明に係る非磁性金属分離装置において、従動ローラの直径を、筒体の直径の２０％以下とすることもできる。これによって、ベルトコンベアから筒体への原料の供給がより滑らかにできる。ここで、従動ローラの直径を、筒体の直径の２０％以下としたのは、２０％を超えると、ベルトコンベアから筒体への原料の供給が円滑にできないためである。
【００１３】
【発明の実施の形態】
続いて、添付した図面を参照しつつ、本発明を具体化した実施の形態につき説明し、本発明の理解に供する。
ここに、図１（Ａ）、（Ｂ）、（Ｃ）はそれぞれ本発明の第１の実施の形態に係る非磁性金属分離装置、同装置の第１、第２の変形例を示す構成図、図２は本発明の第２の実施の形態に係る非磁性金属分離装置の構成図、図３は本発明の第３の実施の形態に係る非磁性金属分離装置の構成図、図４は本発明の第３の実施の形態に係る非磁性金属分離装置の変形例の要部構成図、図５は本発明の第４の実施の形態に係る非磁性金属分離装置の構成図である。
【００１４】
図１（Ａ）に示すように、本発明の第１の実施の形態に係る非磁性金属分離装置１０は、所定の外周速度Ｖで時計方向（原料搬送方向１６と同じ方向）に回転し、非磁性かつ非導電性材料からなる断面円形の筒体１１と、筒体１１内の上部位置に偏心して配置され、筒体１１の内壁１２上部とは僅少の隙間Ｇを有して配置され、周方向に隣り合って異なる磁極（Ｓ極、Ｎ極）を交互に有し、高速で時計方向に回転する回転磁石１３と、筒体１１の上位置に選別しようとする原料１４を供給するベルトコンベア１５とを有している。そして、ベルトコンベア１５の原料排出側には、ベルトコンベア１５から排出された原料１４を筒体１１の上部に案内し、しかも、排出された原料１４が原料搬送方向１６とは逆方向に落下するのを防止する非磁性かつ非導電性材料からなるガイド部材１７が設けられている。以下、これらについて詳しく説明する。
【００１５】
図１（Ａ）に示すように、ベルトコンベア１５は、図示しない駆動モータに連結された減速機構を介して時計方向に回転される大径の駆動ローラ１８と、原料搬送方向１６の下流端に配置された小径の従動ローラ１９と、従動ローラ１９の下方で駆動ローラ１８側に配置された中径のテンションローラ２０とが無端の搬送ベルト２１に巻回されている。なお、ベルトコンベア１５の原料排出側に設けられた従動ローラ１９は筒体１１の軸心Ｔに平行に配置されており、その直径ｄが筒体１１の直径Ｄより小さく形成されている。さらに、従動ローラ１９は筒体１１の上位置であって、筒体１１の軸心Ｔを通る垂線ｍを基準として原料搬送方向１６に対して手前側に配置されている。なお、従動ローラ１９及びテンションローラ２０は非磁性かつ非導電性材料からなっている。
【００１６】
図１（Ａ）に示すように、筒体１１は偏心して配置された回転磁石１３を内蔵しており、筒体１１の両端部には図示しない駆動、従動側回転軸が形成されている。駆動、従動側回転軸はそれぞれ駆動、従動側軸受により支持されており、駆動側回転軸には減速機構を介して電動モータが連結されている。かかる構成により、電動モータの駆動によって、筒体１１を回転中心（軸心）Ｔの廻りを時計方向に回転することができる。
【００１７】
図１（Ａ）に示すように、回転磁石１３の表面部には、Ｓ極、Ｎ極が周方向に交互に隣り合って複数個配置されており、Ｓ極、Ｎ極によって形成される外径Ｌの外形と筒体１１の上端部の内壁１２とは僅少の隙間Ｇ（例えば、１〜２ｍｍ）を有して配置されている。回転磁石１３も、筒体１１と同様に、両端部には図示しない駆動、従動側回転軸が形成され、駆動、従動側回転軸はそれぞれ駆動、従動側軸受により支持されており、駆動側回転軸には減速機構を介して電動モータが連結されている。回転磁石１３の回転中心（軸心）Ｋは筒体１１の回転中心Ｔより垂直方向上側に距離δだけ偏心している。かかる構成により、電動モータの駆動によって、回転磁石１３は回転中心Ｋの廻りを時計方向に高速度で回転することができる。
【００１８】
図１（Ａ）に示すように、ベルトコンベア１５の上側の搬送ベルト２１は水平に配置されており、ベルトコンベア１５の原料排出側には、従動ローラ１９付近の搬送ベルト２１によりベルトコンベア１５から排出された原料１４を筒体１１の上部（垂線ｍの手前側、即ち、垂線ｍに対して上流側）に案内するためのガイド部材１７が設けられている。ガイド部材１７は排出された原料１４が原料搬送方向１６とは逆方向（左側方向、即ち、反時計回り）に落下するのを防止でき、非磁性かつ非導電性材料からなっている。なお、ベルトコンベア１５によりガイド部材１７に搬送される原料１４は、ガイド部材１７により若干搬送速度がアップされ、これにより、ガイド部材１７から搬送される原料１４の筒体１１の上での滞留を少なくして、分離の効果を高くするようになっている。
【００１９】
図１（Ａ）に示すように、ガイド部材１７は側面視して底辺を上側にした断面三角形状に形成されており、底辺側である原料搬送路２２は水平に配置された上側の搬送ベルト２１の原料搬送路２３と同一レベルで水平になるように配置されている。さらに、原料搬送路２２の原料排出端２４は筒体１１の上端Ｊとほぼ同じ高さ位置に配置されている。かかる構成によって、ベルトコンベア１５の従動ローラ１９近傍の搬送ベルト２１から排出された原料１４が、ガイド部材１７を介して、筒体１１の上端Ｊとほぼ同じ高さ位置で、隙間Ｇの位置の若干後方（上流側）の位置に渡されるようになっている。この結果、筒体１１上に搬送された原料１４中の非磁性金属（アルミニウム片や銅片等）に対する回転磁石１３による電磁誘導力の作用が効果的になるので、効率のよい分離が行われることになる。なお、筒体１１に載った原料１４は、回転磁石１３によって発生する磁場により非磁性金属が飛翔するが、その残りの原料滓は筒体１１を伝って下方に落下する。この場合、回転磁石１３は筒体１１に対して上方に偏心しているので、仮に原料滓中に磁性金属が含まれていても、筒体１１の下流側に行くに従って磁気が弱くなるため、円滑に円筒１１から離脱し、原料滓と共に落下する（なお、以下の実施の形態においても同じ）。
【００２０】
図１（Ｂ）及び図１（Ｃ）はそれぞれ、回転磁石１３が偏心して内蔵され、位置が固定された筒体１１に対して、ベルトコンベア１５が全体として垂直方向に上側に少し位置を変えて配置された、非磁性金属分離装置１０の第１、第２の変形例である非磁性金属分離装置１０ａ、１０ｂを表している。なお、非磁性金属分離装置１０と同一の構成要素については、同一の符号を付して詳しい説明を省略する。
図１（Ｂ）及び図１（Ｃ）に示すように、非磁性金属分離装置１０ａ、１０ｂは、非磁性金属分離装置１０に較べて、ベルトコンベア１５の従動ローラ１９部から排出された原料１４が、筒体１１の上端Ｊとほぼ同じ高さ位置で、隙間Ｇの位置の若干後方の位置に渡されるように、それぞれガイド部材２５、２６の原料搬送路２７、２８の傾斜角をα、βとしている。非磁性金属分離装置１０のガイド部材１７の原料搬送路２２の傾斜角は０度（水平）であり、原料搬送路２７、２８の傾斜角α、βはそれぞれ約１５、３０度である。
【００２１】
次いで、本発明の第１の実施の形態に係る非磁性金属分離装置１０の作用について、図１（Ａ）を参照しながら説明する。
（１）図示しない貯留ホッパーから分離する原料１４を、ベルトコンベア１５の上側の搬送ベルト２１の上流側に切り出す。
（２）ベルトコンベア１５の搬送ベルト２１上に切り出された原料１４は、駆動ローラ１８の回転駆動により駆動される搬送ベルト２１に載置されて原料搬送方向１６に移動する。
【００２２】
（３）ベルトコンベア１５の従動ローラ１９部から排出された原料１４は、上側の搬送ベルト２１の水平に配置された原料搬送路２３と略同一レベルで水平に配置された原料搬送路２２を備えたガイド部材１７を介して、筒体１１の上端Ｊ（隙間Ｇの位置）の若干後方の位置でほぼ同じ高さ位置である、原料搬送方向１６と同じ方向に回転する筒体１１の外周面上に排出される。
（４）筒体１１上に搬送された原料１４中の非磁性金属は、筒体１１内に偏心して配置され、筒体１１の回転速度より高速で回転する回転磁石１３の磁力線に基づく電磁誘導力を受けて原料１４中の他の物より遠くに飛ばされることにより、効果的に分離される。従来のような搬送ベルトを設けた場合の搬送ベルトの表面磁束密度を、例えば３０００Ｇ（ガウス）と仮定すると、このような搬送ベルトを省略した本実施の形態では、筒体１１の表面磁束密度が３５００Ｇにアップし、この結果、原料１４の飛散分離能力が従来に較べて１．３６倍アップすることになる。
【００２３】
（５）特に、ガイド部材１７から筒体１１上に受け渡される原料１４中の非磁性金属は、落下のヘッド差が無い（即ち、位置エネルギーが無い）ため、筒体１１の外周面上で跳ね上がりが抑制され、筒体１１上の一定の位置にスムーズに受け渡されるので、非磁性金属に作用する回転磁石１３による電磁誘導力が常に、安定するため、非磁性金属の飛翔ルートのバラツキが小さくなり、正確な分離が行われることになる。
【００２４】
次に、本発明の第２の実施の形態に係る非磁性金属分離装置３０について、図２を参照して説明する。なお、非磁性金属分離装置１０と同一の構成要素については、同一の符号を付して詳しい説明を省略する。
非磁性金属分離装置３０は、所定の外周速度Ｕで時計方向（原料搬送方向１６と同じ方向）に回転し、非磁性かつ非導電性材料からなる断面円形の筒体３１と、筒体３１内の上部位置に偏心（偏心量＝ｆ）して配置され、筒体３１の内壁３２上部とは僅少の隙間ｇを有して配置され、周方向に隣り合って異なる磁極（Ｓ極、Ｎ極）を交互に有し、高速で時計方向に回転する回転磁石３３と、筒体３１の上位置に選別しようとする原料１４を供給するベルトコンベア３４とを有している。以下、これらについて詳しく説明する。なお、筒体３１の回転中心（軸心）をＴ、回転磁石３３の回転中心（軸心）をＫとする。回転中心Ｔを通る垂線をｍとし、回転中心Ｔと回転中心Ｋとを結ぶ直線をｎとすると、垂線ｍと直線ｎとの交差角はγである。
【００２５】
ベルトコンベア３４の原料排出側の従動ローラ３５は非磁性かつ非導電性材料からなっており、筒体３１の軸心Ｔに平行に配置されている。従動ローラ３５の直径ｈは筒体３１の直径Ｈより小さく形成されており、更に従動ローラ３５は筒体３１の上位置であって、筒体３１の軸心Ｔを通る垂線ｍを基準として原料搬送方向１６に対して手前側に配置されている。ベルトコンベア３４は、図示しない駆動モータに連結された減速機構を介して時計方向に回転される大径の駆動ローラ３６と、原料搬送方向１６の下流端に配置された小径の従動ローラ３５とが無端の搬送ベルト３７に巻回されている。
【００２６】
筒体３１の回転駆動機構は筒体１１と同様の構成となっており、一方、回転磁石３３の回転駆動機構も回転磁石１３と同様の構成となっているので、説明を割愛する。
筒体３１の外表面には、ベルトコンベア３４の排出端から排出される原料１４が筒体３１の後方に落下するのを防止するために、多数の点状の落下防止用突起３８がランダムに設けられている。落下防止用突起３８の高さは５〜１０ｍｍの範囲にある。従って、図２に示すように、筒体３１の軸心Ｔを通る垂線ｍを基準として原料搬送方向１６に対して手前側でベルトコンベア３４から落下する原料１４は、回転する筒体３１及び多数の落下防止用突起３８によって、確実に筒体３１の外周面上に載置されて前側（時計廻り）に移動し、筒体３１の内側に僅少の隙間ｇを有して配置された回転磁石３３の磁束に基づく電磁誘導力の作用を受けて、原料１４中の非磁性金属が効果的に分離されることになる。
【００２７】
さらに、本発明の第３の実施の形態に係る非磁性金属分離装置４０について、図３を参照して説明する。なお、非磁性金属分離装置１０、３０と同一の構成要素については、同一の符号を付して詳しい説明を省略する。
非磁性金属分離装置４０は、原料搬出側端部に設けられた小径の従動ローラ４１によってガイドされる搬送ベルト４２を有し、しかも、従動ローラ４１の手前側（左側、即ち、上流側）近傍に位置する搬送ベルト４２の直下には空間部４３を有するベルトコンベア４４と、空間部４３に配置され、搬送ベルト４２とは僅少の隙間ｋを有し、周方向に隣り合って異なる磁極（Ｓ極、Ｎ極）を交互に有し、高速で時計方向に回転する回転磁石４５とを有している。
【００２８】
回転磁石４５の外側には非磁性かつ非導電性材料からなる筒体４６が隙間ｓを有して配置されており、しかも回転磁石４５は、直径Ｐを有する筒体４６の軸心（回転中心）Ｔに対して同軸状に配置されている。
上流側に駆動ローラ４７を備えたベルトコンベア４４の従動ローラ４１の下位置には、搬送ベルト４２に巻回されたリターンローラ４８が設けられており、リターンローラ４８により上側の搬送ベルト４２の原料搬送路４９を従動ローラ４１の位置から下方に向けている。
【００２９】
筒体４６は、筒体１１とは異なり、原料１４を載せて原料搬送方向１６に駆動される搬送ベルト４２の下面との摩擦力により回転する構造となって、電動モータ及び減速機構等が省略されている。一方、回転磁石４５の回転駆動機構は回転磁石１３と同様の構成となっている。
なお、図３に示すように、回転磁石４５の軸心Ｔから従動ローラ４１の搬送ベルト４２の最終当接位置までの水平距離ａは最小限にする必要があり、水平距離ａが小さければ、分離した非磁性金属の飛翔距離がより小さくて済み、これにより分離効率が向上する。また、従動ローラ４１によってガイドされた後の搬送ベルト４２を、従動ローラ４１の位置から下方であって従動ローラ４１の搬送ベルト４２の最終当接位置を通る垂線を基準にして、回転磁石４５に対して反対側で垂線に対して０〜３０度の方向に指向させるのが好ましい。
【００３０】
図４には非磁性金属分離装置４０の変形例である非磁性金属分離装置４０ａの要部を示す。なお、非磁性金属分離装置４０と類似の構成要素については、同一の番号にアルファベット（ａ）を付して詳しい説明を省略する。
非磁性金属分離装置４０ａは非磁性金属分離装置４０と較べて、従動ローラ４１ａとリターンローラ４８ａとでガイドされる搬送ベルト４２ａの一部にも回転磁石４５ａが近接して配置されている。これによって、従動ローラ４１ａの上流側で回転磁石４５ａにより、原料１４から殆どの非磁性金属が分離された後、まだ分離されず原料１４中に残留している非磁性金属が、搬送ベルト４２ａに沿って落下する途中で再度回転磁石４５ａによる磁場の働きにより飛翔分離されることになる。
【００３１】
かかる構成を達成するために、非磁性金属分離装置４０ａにおいては、従動ローラ４１ａを極めて小径（筒体４６ａの直径の約０．２倍以下の直径）にし、かつ、従動ローラ４１ａとリターンローラ４８ａとでガイドされる搬送ベルト４２ａが筒体４６ａに近接するように、リターンローラ４８ａの直径及び位置を決定している。しかも、従動ローラ４１ａとリターンローラ４８ａとでガイドされる搬送ベルト４２ａの垂直に対する傾斜角ηは５〜１０度程度としている。なお、符号４９ａは搬送ベルト４２ａの原料搬送路を示す。
【００３２】
本発明の第４の実施の形態に係る非磁性金属分離装置５０について、図５を参照して説明する。なお、非磁性金属分離装置１０、３０、４０と同一の構成要素については、同一の符号を付して詳しい説明を省略する。
非磁性金属分離装置５０においては、ベルトコンベア５１の原料搬送路５２側の搬送ベルト５３を実質的に水平又は水平に対して０度を超え２０度以内の下り勾配に保持するように（本実施の形態では、水平）、駆動ローラ５４と、従動ローラとして作用する筒体５５とを配置しており、筒体５５の内部には高速回転（１０００〜３６００ｒｐｍ）する回転磁石５６が設けられ、筒体５５の下位置に配置された小径のリターンローラ５７を備え、しかも、筒体５５とリターンローラ５７との間にはリターンローラ５７よりもっと小径のガイドローラ５８が配置されている。
【００３３】
さらに、搬送ベルト５３が筒体５５に接する角度θを１０〜８０度の範囲に制限しており、これによって、搬送ベルト５３による搬送方向１６による分離効果及び回転磁石５６による分離効果を向上できるため、原料１４中の非磁性金属と原料滓との分離が効率よく行え、回収効率が向上する。
なお、非磁性金属分離装置４０と同様、回転磁石５６の軸心Ｔからガイドローラ５８の搬送ベルト５３の最外側位置までの水平距離ｂは出来るだけ短くすることが望ましく、水平距離ｂが小さければ小さいほど、分離した非磁性金属の飛翔距離がより小さくて済み、これにより分離効率が向上する。この点を考慮して、ガイドローラ５８の径及び位置を決定する。また、ガイドローラ５８とリターンローラ５７との間の搬送ベルト５３は、垂直に対して下向きに筒体５５側に傾斜しているが、これに限定されず、垂直又は下向きに筒体５５と反対側に傾斜しても構わない。
【００３４】
本発明は前記した実施の形態に限定されるものではなく、本発明の要旨を変更しない範囲での変更は可能であり、例えば、前記したそれぞれの実施の形態や変形例の一部又は全部を組み合わせて本発明の非磁性金属分離装置を構成する場合にも本発明の権利範囲に含まれる。
図１（Ｂ）、（Ｃ）に示すように、非磁性金属分離装置１０ａ、１０ｂにおいては、非磁性金属分離装置１０に較べてベルトコンベア１５の従動ローラ１９及び従動ローラ１９に続くガイド部材２５、２６を、筒体１１に対して上下又は傾斜調整可能に配置したが、これに限定されず、必要に応じて、従動ローラを備えたベルトコンベア及びガイド部材を筒体１１に対して固定しておくこともできる。
【００３５】
また、非磁性金属分離装置１０において、従動ローラ１９のみを上下調整可能にし、しかも、従動ローラ１９の移動に追随してガイド部材１７を傾斜させて所定の位置に原料１４を供給するように構成して、非磁性金属分離装置１０ａ、１０ｂと実質的に同様な効果を奏するようにすることもできる。さらに、逆に、例えば、図１（Ａ）において、ベルトコンベア１５を固定し、回転磁石１３を内蔵する筒体１１を下降させ、筒体１１の下降に応じて、ガイド部材１７の水平に配置された原料搬送路２２を傾斜させるようにすることもできる。
ガイド部材１７の原料搬送路２２の傾斜角は０、１５、３０度としたが、これに限定されず、状況に応じて、最大３０度、最小−３０度（即ち、水平に対して３０度下方に傾斜している）の範囲内とすることもできる。
【００３６】
非磁性金属分離装置３０においては、筒体３１の外表面にはベルトコンベア３４から排出される原料１４の後方落下を防止するため多数の点状の落下防止用突起３８を設けたが、これに限定されず、状況に応じて、多数の線状の落下防止用突起を設けても構わない。また、落下防止用突起３８の高さを５〜１０ｍｍの範囲としたが、これに限定されず、それ以外の範囲の高さとすることもできる。
非磁性金属分離装置４０においては、回転磁石４５を筒体４６の軸心に対して同軸に配置したが、これに限定されず、必要に応じて、回転磁石を筒体の軸心に対して偏心して配置することもできる。また、従動ローラ４１の下位置にリターンローラ４８を設けたが、これに限定されず、状況に応じて、リターンローラを省略することもできる。
従動ローラ１９、３５、４１の直径の大きさについては言及しなかったが、筒体の直径Ｄ、Ｈ、Ｐの２０％以下であることが好ましい。
【００３７】
【発明の効果】
請求項１〜３及びこれらに従属する請求項１１記載の非磁性金属分離装置においては、筒体の直径より小さいベルトコンベアの従動ローラが、筒体の上位置で筒体の軸心を通る垂線を基準として原料搬送方向に対して手前側に配置され、また、ガイド部材が筒体の軸心を通る垂線を基準として原料搬送方向に対して手前側に配置されて、ベルトコンベアから排出された原料を筒体の上部に案内し、原料が原料搬送方向とは逆方向に落下するのを防止することができるので、ベルトコンベアから排出される全ての原料を確実に、かつ滑らかに回転磁石の電磁誘導力が作用する領域に供給することができる。従って、処理する原料の量が多くても、原料中の非磁性金属の割合に関係なく、効率良く原料中の非磁性金属を分離することができる。
更には、回転磁石は筒体の上部位置に偏心して配置しているので、供給された原料により強い磁場をかけ、更に筒体の下部では磁力が小さいので、仮に原料中に磁性物が混じっていても、筒体の下部に留まる恐れがない。
【００３８】
特に、請求項２記載の非磁性金属分離装置においては、原料の条件（種類）や搬送速度、回転磁石の磁束密度や回転速度等に応じて、従動ローラの高さ位置やガイド部材の傾きを変えることにより、ベルトコンベアから排出される全ての原料を確実に、かつ滑らかに回転磁石の電磁誘導力が作用する領域に供給することができるので、さらに、分離効率が向上できる。
請求項３記載の非磁性金属分離装置においては、ベルトコンベアから排出される全ての原料を確実に、しかも、より滑らかに回転磁石の電磁誘導力が作用する領域に供給することができるので、分離効率をさらに向上できる。
【００３９】
請求項４、５及びこれらに従属する請求項１１記載の非磁性金属分離装置においては、筒体の直径より小さいベルトコンベアの従動ローラが筒体の上位置で筒体の軸心を通る垂線を基準として原料搬送方向に対して手前側に配置され、また、筒体の外表面には多数の線状又は点状の落下防止用突起が設けられているので、ベルトコンベアから排出される原料の後方落下を確実に防止すると共に、原料を回転磁石の作用する領域に供給することができる。従って、処理する原料が多く、原料中の非磁性金属の割合に関係なく、効率良く原料中の非磁性金属を分離することができる。
特に、請求項５記載の非磁性金属分離装置においては、原料の落下防止をより効果的に行うことができると共に、回転磁界による分離効果も向上することができるので、分離効率が向上する。
【００４０】
請求項６〜９記載の非磁性金属分離装置においては、原料中に磁性金属があった場合、磁性金属が回転磁石に吸引されて、搬送ベルトの強磁場位置に保持されるのを、強制的に徐々に離し、この結果、分離後の原料中の磁性金属が従動ローラの下流側の搬送ベルトに付着することを防止できるので、磁性金属の付着によって生じる問題を解消できる。
特に、請求項７記載の非磁性金属分離装置においては、搬送ベルト上の原料と回転磁石との距離を一定に維持できるので安定した分離ができると共に、搬送ベルトと回転磁石との干渉を回避することができるので、それぞれの損傷を防止でき、安全である。
【００４１】
請求項８記載の非磁性金属分離装置においては、仮に原料中に微少の磁性金属が含まれていても、非磁性金属が除去されて搬送ベルトによって送られる原料滓によって下流側に押し流され、搬送ベルトに留まることがないので、原料中に磁性金属があっても、装置自身に不測のダメージを与えることがない。
そして、請求項９記載の非磁性金属分離装置においては、従動ローラを過ぎて搬送ベルトに沿って落下する原料に再度回転磁石による磁場が働くので、この領域でも非磁性金属の分離が行われ、非磁性金属の分離効率を高めることができる。請求項１０記載の非磁性金属分離装置においては、水平又は水平に対して０度を超え２０度以内の下り勾配に保持された搬送ベルトが、角度を１０〜８０度の範囲で筒体に接しているので、原料中の非磁性金属と原料滓との分離が効率よく行えるため、回収効率が向上する。
請求項１１記載の非磁性金属分離装置においては、従動ローラの直径を、筒体の直径の２０％以下としている。従って、請求項１〜５記載の非磁性金属分離装置においては、分離された筒体への原料の供給がより滑らかにできるので、分離効率がさらに向上する。また、請求項７記載の非磁性金属分離装置においては、これによって、従動ローラの軸心を回転磁石の軸心に近づけることができ、結果として、飛翔分離された非磁性金属が分離された非磁性金属が混じる度合いを減少し、より精度のよい非磁性金属分離ができる。
【図面の簡単な説明】
【図１】（Ａ）、（Ｂ）、（Ｃ）はそれぞれ本発明の第１の実施の形態に係る非磁性金属分離装置、同装置の第１、第２の変形例を示す構成図である。
【図２】本発明の第２の実施の形態に係る非磁性金属分離装置の構成図である。
【図３】本発明の第３の実施の形態に係る非磁性金属分離装置の構成図である。
【図４】本発明の第３の実施の形態に係る非磁性金属分離装置の変形例の要部構成図である。
【図５】本発明の第４の実施の形態に係る非磁性金属分離装置の構成図である。
【符号の説明】
１０、１０ａ、１０ｂ：非磁性金属分離装置、１１：筒体、１２：内壁、１３：回転磁石、１４：原料、１５：ベルトコンベア、１６：原料搬送方向、１７：ガイド部材、１８：駆動ローラ、１９：従動ローラ、２０：テンションローラ、２１：搬送ベルト、２２：原料搬送路、２３：原料搬送路、２４：原料排出端、２５、２６：ガイド部材、２７、２８：原料搬送路、３０：非磁性金属分離装置、３１：筒体、３２：内壁、３３：回転磁石、３４：ベルトコンベア、３５：従動ローラ、３６：駆動ローラ、３７：搬送ベルト、３８：落下防止用突起、４０、４０ａ：非磁性金属分離装置、４１、４１ａ：従動ローラ、４２、４２ａ：搬送ベルト、４３：空間部、４４：ベルトコンベア、４５、４５ａ：回転磁石、４６、４６ａ：筒体、４７：駆動ローラ、４８、４８ａ：リターンローラ、４９、４９ａ：原料搬送路、５０：非磁性金属分離装置、５１：ベルトコンベア、５２：原料搬送路、５３：搬送ベルト、５４：駆動ローラ、５５：筒体、５６：回転磁石、５７：リターンローラ、５８：ガイドローラ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a non-magnetic metal separation device used for separating a non-magnetic metal from a raw material containing a useful non-magnetic metal such as aluminum or copper.
[0002]
[Prior art]
Conventionally, for example, a non-magnetic material used for magnetically separating a non-magnetic metal from a waste (raw material) containing a non-magnetic metal, such as aluminum or copper, for the purpose of reusing the useful non-magnetic metal 2. Description of the Related Art As a metal separation device, those of the type described in JP-A-57-119856 and JP-A-3230253 are known. In this type of separation apparatus, a non-magnetic metal is separated by an electromagnetic induction force through a raw material in a moving magnetic field.
In the device described in JP-A-57-119856, a pair of rotating cylinders made of a non-magnetic material and rotating in opposite directions to each other are arranged at a predetermined interval, and are provided in the pair of rotating cylinders. Has a built-in rotating magnet that rotates in the opposite direction to the rotating cylinder and has a plurality of magnetic poles arranged on the surface in the axial direction, and feeds a raw material containing a non-magnetic metal toward the vicinity of the facing portion of the rotating cylinder. A vibration feeder to be supplied and a guide plate connected to the vibration feeder and arranged obliquely are arranged, and the lower rotating magnet is arranged eccentrically with respect to the rotating cylinder.
On the other hand, the apparatus described in Japanese Patent No. 3230253 is coaxially or eccentrically incorporated in a cylinder with a conveyance belt wound around a driving roller at one end and a cylinder made of a non-magnetic material at the other end. , A rotating magnet that is driven to rotate at a higher speed than the cylindrical body, and a driven roller is disposed below the cylindrical body so as to be biased toward the driving roller from the discharge side end of the cylindrical body, and the driven roller is also provided. The transport belt is wound.
[0003]
[Problems to be solved by the invention]
However, the conventional non-magnetic metal separation apparatus has the following problems to be solved.
In the apparatus described in JP-A-57-119856, the non-magnetic metal in the raw material is supplied from a vibrating feeder and falls from the tip of the guide plate onto the surface of the upper circular arc portion of the lower rotary cylinder. However, in this case, depending on the position of the drop (in the circumferential direction of the rotating cylinder) and the jumping after the drop, the non-magnetic metal is rotated by the rotating magnet despite the action of the electromagnetic induction force (separation force) by the rotating magnet. In the direction opposite to the direction of rotation, that is, in the same direction as the non-metal in the raw material or the magnetic metal that may be slightly contained in the raw material, and accurate separation is not performed. In particular, the falling distance from the tip of the guide plate to the surface of the upper circular arc portion of the lower rotating cylinder is large, the amount of raw material to be processed is large, and the ratio of non-magnetic metal in the raw material is large. The problem was significant when the diameter was small and the magnetic force (magnetic flux density) of the rotating magnet was small. As a result, there is a problem that the purity of the product is reduced.
On the other hand, in the device described in Japanese Patent No. 3230253, a non-magnetic metal (aluminum dust) receives an upward repulsion by a magnetic flux of a rotating magnet, and is discharged in a parabolic shape from a substantially uppermost end of a cylindrical body. However, at this time, if the aluminum scrap transported by the transport belt and the nonmetal or magnetic metal are not sufficiently loosened, the aluminum scrap will not be sufficiently separated, and the recovered aluminum Non-metal is contained in the scrap, and aluminum scrap is mixed on the collected non-metal side, and there is a problem in that each scrap is reused.
[0004]
The present invention has been made in view of such circumstances, and even if the amount of the raw material to be treated is large, regardless of the ratio of the nonmagnetic metal in the raw material, the nonmagnetic metal in the raw material can be efficiently separated. It is an object to provide a metal separation device.
[0005]
[Means for Solving the Problems]
A non-magnetic metal separating device according to a first aspect of the present invention, which rotates at a predetermined peripheral speed, has a cylindrical body having a circular cross section made of a non-magnetic and non-conductive material, and is eccentrically disposed at an upper position in the cylindrical body. It is arranged with a small gap from the upper part of the inner wall of the cylindrical body, has different magnetic poles adjacent to each other in the circumferential direction, and alternates between the rotating magnet rotating at a high speed and the upper position of the cylindrical body. And a driven roller on the raw material discharge side of the belt conveyor is made of a non-magnetic and non-conductive material, is disposed parallel to the axis of the cylindrical body, and has a diameter of the cylindrical body. Smaller than the diameter, further above the cylindrical body, disposed on the near side with respect to the raw material transport direction with respect to a perpendicular passing through the axis of the cylindrical body, and a belt conveyor on the raw material discharge side of the belt conveyor. The raw material discharged from the upper part of the cylinder, Duck, guide member made of a nonmagnetic and nonconductive material to prevent the falling in the opposite direction is provided ejected raw material as a raw material conveying direction. Thereby, the driven roller of the belt conveyor smaller than the diameter of the cylinder is disposed on the near side with respect to the raw material transport direction with reference to a vertical line passing through the axis of the cylinder at the upper position of the cylinder, and the guide member is It is arranged on the near side with respect to the raw material transport direction with reference to the perpendicular passing through the axis of the cylindrical body, guides the raw material discharged from the belt conveyor to the upper part of the cylindrical body, and the raw material is in the opposite direction to the raw material transport direction. Since falling can be prevented, all the raw materials discharged from the belt conveyor can be reliably and smoothly supplied to the region where the electromagnetic induction force of the rotating magnet acts.
[0006]
In the non-magnetic metal separation device according to the first invention, the driven roller and the guide member following the driven roller may be arranged so as to be vertically adjustable relative to the cylindrical body. By changing the height position of the driven roller and the inclination of the guide member according to the conditions of the raw materials, the transport speed, the magnetic flux density and the rotational speed of the rotating magnet, etc., all the raw materials discharged from the belt conveyor can be reliably maintained. And smoothly and smoothly to the region where the electromagnetic induction force of the rotating magnet acts.
In the non-magnetic metal separation device according to the first invention, the raw material transport path of the guide member is within a range of ± 30 degrees with respect to the horizontal, and the raw material discharge end of the guide member is aligned with the axis of the cylindrical body. It can also be arranged on the near side in the raw material transport direction with respect to the perpendicular passing through. Thus, all the raw materials discharged from the belt conveyor can be reliably and smoothly supplied to the region where the electromagnetic induction force of the rotating magnet acts. The reason that the material conveying path of the guide member is set to be within ± 30 degrees with respect to the horizontal is that when the temperature exceeds +30 degrees, the impact when the material falls from the guide member to the cylinder increases, thereby easily scattering on the cylinder. On the other hand, if it is less than -30 degrees, it is difficult to supply the raw material smoothly from the guide member to the cylindrical body.
[0007]
A non-magnetic metal separation device according to a second aspect of the present invention, which rotates at a predetermined outer peripheral speed and has a circular cross-section made of a non-magnetic and non-conductive material, and an eccentrically arranged upper portion in the cylinder. It is arranged with a small gap from the upper part of the inner wall of the cylindrical body, has different magnetic poles adjacent to each other in the circumferential direction, and alternates between the rotating magnet rotating at a high speed and the upper position of the cylindrical body. And a driven roller on the raw material discharge side of the belt conveyor is made of a non-magnetic and non-conductive material, is disposed parallel to the axis of the cylindrical body, and has a diameter of the cylindrical body. Smaller than the diameter, further above the cylinder, disposed on the near side with respect to the raw material transport direction with respect to a perpendicular passing through the axis of the cylinder, and discharged from the belt conveyor on the outer surface of the cylinder. Multiple lines or dots to prevent the material from falling backward It may be provided fall preventing protrusion. Thereby, the driven roller of the belt conveyor smaller than the diameter of the cylinder is disposed on the front side with respect to the raw material transport direction with respect to a vertical line passing through the axis of the cylinder at the upper position of the cylinder, and Since a large number of linear or dot-shaped projections for preventing falling are provided on the surface, the material discharged from the belt conveyor is reliably prevented from falling backward, and the electromagnetic induction force of the rotating magnet acts on the material. Can be supplied to the area. Here, as the shape of the linear or dot-shaped drop prevention projection, the cross section is trapezoidal when viewed in the axial direction of the cylinder, and the upper side is shorter than the bottom side, thereby increasing the rotation speed of the cylinder. Even in this case, it is also possible to reduce the carry-in of the raw material by the projections for preventing the fall and to improve the efficiency of the separation.
[0008]
In the non-magnetic metal separator according to the second invention, the height of the fall prevention projection may be in the range of 5 to 10 mm. Thereby, the fall of the raw material can be more effectively prevented, and the separation effect by the rotating magnet can be improved. Here, the reason why the height of the fall prevention projection is set in the range of 5 to 10 mm is that if the height is less than 5 mm, the fall cannot be prevented. This is because a splashing phenomenon occurs and the separation ability is reduced.
[0009]
According to a third aspect of the present invention, there is provided a non-magnetic metal separating apparatus having a conveying belt guided by a small-diameter driven roller provided at an end of a material discharge side, and further comprising a conveying belt positioned near a front side of the driven roller. A belt conveyor having a space portion directly below the conveyer belt and a space portion, which has a small gap with the conveyer belt, alternately has different magnetic poles adjacent to each other in a circumferential direction, and rotates at a high speed. And a non-magnetic metal in the raw material conveyed by the belt conveyor is separated by a rotating magnet. As a result, if there is a magnetic metal in the raw material, the magnetic metal is attracted to the rotating magnet and is gradually released from being held at the strong magnetic field position of the conveyor belt. The magnetic metal inside can be prevented from adhering to the transport belt on the downstream side of the driven roller.
[0010]
In the non-magnetic metal separation device according to the third invention, a cylindrical body made of a non-magnetic and non-conductive material is arranged with a gap outside the rotary magnet, and the rotary magnet is attached to the axis of the cylindrical body. It can also be arranged coaxially or eccentrically to it. Thereby, the distance between the raw material on the conveyor belt and the rotating magnet can be kept constant, and interference between the conveyor belt and the rotating magnet can be avoided.
In the non-magnetic metal separation device according to the third invention, a return roller is provided at a position below the driven roller, and the conveying belt guided by the driven roller is moved downward from the position of the driven roller by the driven roller. With respect to a perpendicular passing through the final contact position of the conveyor belt, the conveyor belt may be directed in a direction of 0 to 30 degrees with respect to the perpendicular on the opposite side to the rotating magnet. Thus, even if the raw material contains a small amount of magnetic metal (for example, iron), the non-magnetic metal is removed, and the raw material (raw material residue) sent by the conveyor belt is swept downstream by the raw material. Never stay. Here, the reason why the magnetic metal is oriented in the direction of 0 to 30 degrees with respect to the perpendicular is that if it is less than 0 degree, the magnetic metal tends to stay on the conveyor belt, and if it exceeds 30 degrees, it becomes difficult to fly and separate. is there.
In the non-magnetic metal separation device according to the third invention, the rotating magnet is also close to a part of the transport belt guided by the driven roller and the return roller, and flies the non-magnetic metal in the raw material falling along the transport belt. It can also be separated. As a result, a magnetic field is again generated by the rotating magnet on the raw material that falls along the transport belt after passing the driven roller.
[0011]
A non-magnetic metal separating apparatus according to a fourth aspect of the present invention which functions as a driving roller and a driven roller for holding the conveyor belt substantially horizontally or at a downward slope of more than 0 degrees and less than 20 degrees with respect to the horizontal. A non-magnetic metal separation device including a cylindrical body, and a small-diameter return roller disposed at a position below the cylindrical body, and a rotating magnet that rotates at a high speed inside the cylindrical body. A guide roller is interposed between the rollers, and the angle at which the conveyor belt contacts the cylinder is limited to a range of 10 to 80 degrees. As a result, the conveyor belt held horizontally or at a downward slope of more than 0 degrees and less than 20 degrees with respect to the horizontal is in contact with the cylinder at an angle in the range of 10 to 80 degrees. And the raw material slag can be efficiently separated. Here, the reason why the downward gradient of the conveyor belt is horizontal or horizontal and that it is within 20 degrees with respect to the horizontal is that if the upward gradient is exceeded beyond horizontal, the flight distance of the non-magnetic metal becomes short, while This is because, if the slope is lower than the above, the influence of gravity on the electromagnetic induction force increases, and the separation efficiency decreases. Further, the angle at which the conveyor belt contacts the cylindrical body is in the range of 10 to 80 degrees. If the angle is less than 10 degrees, the electromagnetic induction force is too small and the effect of separation is small. This is because the effect of the electromagnetic induction force is saturated.
[0012]
In the non-magnetic metal separation device according to the first to third inventions, the diameter of the driven roller may be set to 20% or less of the diameter of the cylindrical body. This makes it possible to supply the raw material from the belt conveyor to the cylinder more smoothly. Here, the reason why the diameter of the driven roller is set to 20% or less of the diameter of the cylindrical body is that if it exceeds 20%, the supply of the raw material from the belt conveyor to the cylindrical body cannot be performed smoothly.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.
Here, FIGS. 1A, 1B, and 1C are configuration diagrams showing a nonmagnetic metal separation device according to a first embodiment of the present invention, and first and second modifications of the device, respectively. FIG. 2 is a configuration diagram of a non-magnetic metal separation device according to a second embodiment of the present invention, FIG. 3 is a configuration diagram of a non-magnetic metal separation device according to a third embodiment of the present invention, and FIG. FIG. 5 is a configuration diagram of a main part of a modification of the non-magnetic metal separation device according to the third embodiment of the present invention. FIG. 5 is a configuration diagram of the non-magnetic metal separation device according to the fourth embodiment of the present invention.
[0014]
As shown in FIG. 1A, the non-magnetic metal separation device 10 according to the first embodiment of the present invention rotates clockwise (in the same direction as the raw material transport direction 16) at a predetermined peripheral speed V, A cylindrical body 11 having a circular cross section made of a non-magnetic and non-conductive material, and eccentrically arranged at an upper position in the cylindrical body 11, and arranged with a small gap G with an upper part of an inner wall 12 of the cylindrical body 11; A belt that alternately has different magnetic poles (S-pole, N-pole) adjacent to each other in the circumferential direction and rotates clockwise at high speed, and a belt that supplies a raw material 14 to be sorted to an upper position of the cylindrical body 11 And a conveyor 15. Then, on the raw material discharge side of the belt conveyor 15, the raw material 14 discharged from the belt conveyor 15 is guided to the upper part of the cylindrical body 11, and the discharged raw material 14 falls in a direction opposite to the raw material transport direction 16. And a guide member 17 made of a non-magnetic and non-conductive material. Hereinafter, these will be described in detail.
[0015]
As shown in FIG. 1A, a belt conveyor 15 has a large-diameter drive roller 18 rotated clockwise through a speed reduction mechanism connected to a drive motor (not shown), and a downstream end in a material transport direction 16. A small-diameter driven roller 19 disposed and a medium-diameter tension roller 20 disposed below the driven roller 19 on the drive roller 18 side are wound around an endless transport belt 21. The driven roller 19 provided on the material discharge side of the belt conveyor 15 is disposed parallel to the axis T of the cylindrical body 11, and has a diameter d smaller than the diameter D of the cylindrical body 11. Further, the driven roller 19 is located at a position above the cylindrical body 11 and is located on the near side with respect to the raw material transport direction 16 with reference to a perpendicular line m passing through the axis T of the cylindrical body 11. The driven roller 19 and the tension roller 20 are made of a non-magnetic and non-conductive material.
[0016]
As shown in FIG. 1 (A), the cylinder 11 has a built-in rotary magnet 13 disposed eccentrically, and a drive and driven side rotation shaft (not shown) is formed at both ends of the cylinder 11. The drive and driven-side rotary shafts are supported by drive and driven-side bearings, respectively, and an electric motor is connected to the drive-side rotary shaft via a speed reduction mechanism. With this configuration, the cylindrical body 11 can be rotated clockwise around the rotation center (axial center) T by driving the electric motor.
[0017]
As shown in FIG. 1A, a plurality of S poles and N poles are alternately arranged adjacent to each other in the circumferential direction on the surface of the rotating magnet 13. The outer shape of the diameter L and the inner wall 12 at the upper end of the cylindrical body 11 are arranged with a small gap G (for example, 1 to 2 mm). Similarly to the cylindrical body 11, the rotating magnet 13 has drive and driven rotation shafts (not shown) formed at both ends, and the drive and driven rotation shafts are supported by drive and driven bearings, respectively. An electric motor is connected to the shaft via a speed reduction mechanism. The rotation center (axis) K of the rotating magnet 13 is vertically eccentric from the rotation center T of the cylinder 11 by a distance δ. With this configuration, the rotating magnet 13 can rotate around the rotation center K at a high speed clockwise by driving the electric motor.
[0018]
As shown in FIG. 1 (A), the conveyor belt 21 on the upper side of the belt conveyor 15 is horizontally arranged, and the material discharge side of the belt conveyor 15 is moved from the belt conveyor 15 by the conveyor belt 21 near the driven roller 19. A guide member 17 is provided for guiding the discharged raw material 14 to the upper part of the cylindrical body 11 (on the near side of the perpendicular m, that is, on the upstream side with respect to the perpendicular m). The guide member 17 can prevent the discharged raw material 14 from dropping in a direction opposite to the raw material transport direction 16 (leftward direction, that is, counterclockwise), and is made of a non-magnetic and non-conductive material. The raw material 14 conveyed to the guide member 17 by the belt conveyor 15 is slightly conveyed at a higher speed by the guide member 17, so that the raw material 14 conveyed from the guide member 17 stays on the cylindrical body 11. It is designed to increase the effect of separation by reducing it.
[0019]
As shown in FIG. 1 (A), the guide member 17 is formed in a triangular cross section with the bottom side facing upward when viewed from the side, and the raw material conveyance path 22 on the bottom side is an upper conveyance belt arranged horizontally. 21 are arranged so as to be horizontal at the same level as the material transport path 23. Further, the raw material discharge end 24 of the raw material transport path 22 is disposed at a position substantially at the same height as the upper end J of the cylindrical body 11. With this configuration, the raw material 14 discharged from the transport belt 21 near the driven roller 19 of the belt conveyor 15 is positioned at the same height position as the upper end J of the cylindrical body 11 via the guide member 17 at the position of the gap G. It is passed to a position slightly behind (upstream side). As a result, the action of the electromagnetic induction force by the rotating magnet 13 on the non-magnetic metal (aluminum piece, copper piece, etc.) in the raw material 14 conveyed on the cylindrical body 11 becomes effective, so that efficient separation is performed. Will be. The raw material 14 placed on the cylindrical body 11 causes the non-magnetic metal to fly due to the magnetic field generated by the rotating magnet 13, but the remaining raw material residue falls down along the cylindrical body 11. In this case, since the rotating magnet 13 is eccentric upward with respect to the cylindrical body 11, even if the raw metal slag contains a magnetic metal, the magnetism becomes weaker toward the downstream side of the cylindrical body 11, so that , And falls along with the raw material residue (the same applies to the following embodiments).
[0020]
1 (B) and 1 (C), respectively, the belt conveyor 15 slightly changes its position slightly upward in the vertical direction as a whole with respect to the cylindrical body 11 in which the rotating magnet 13 is eccentrically incorporated and whose position is fixed. 1 shows non-magnetic metal separators 10a and 10b which are first and second modifications of the non-magnetic metal separator 10 arranged in a horizontal direction. The same components as those of the non-magnetic metal separator 10 are denoted by the same reference numerals, and detailed description thereof will be omitted.
As shown in FIGS. 1 (B) and 1 (C), the non-magnetic metal separation devices 10a and 10b are different from the non-magnetic metal separation device 10 in that the raw material 14 discharged from the driven roller 19 of the belt conveyor 15 is used. Are inclined at α and α, respectively, so that the material conveying paths 27 and 28 of the guide members 25 and 26 are respectively provided at positions substantially the same height as the upper end J of the cylindrical body 11 and slightly behind the position of the gap G. β. The inclination angle of the raw material transfer path 22 of the guide member 17 of the non-magnetic metal separation device 10 is 0 degree (horizontal), and the inclination angles α and β of the raw material transfer paths 27 and 28 are about 15 and 30 degrees, respectively.
[0021]
Next, the operation of the non-magnetic metal separation device 10 according to the first embodiment of the present invention will be described with reference to FIG.
(1) The raw material 14 to be separated from the storage hopper (not shown) is cut out on the upstream side of the conveyor belt 21 above the belt conveyor 15.
(2) The raw material 14 cut out on the transport belt 21 of the belt conveyor 15 is placed on the transport belt 21 driven by the rotation of the drive roller 18 and moves in the raw material transport direction 16.
[0022]
(3) The raw material 14 discharged from the driven roller 19 of the belt conveyor 15 is provided with a raw material transport path 22 horizontally arranged at substantially the same level as the horizontally arranged raw material transport path 23 of the upper transport belt 21. The outer peripheral surface of the cylindrical body 11 that rotates in the same direction as the raw material transport direction 16 at a position slightly behind the upper end J (position of the gap G) of the cylindrical body 11 through the guide member 17 at a position slightly behind the upper end J (position of the gap G). Is discharged on top.
(4) The non-magnetic metal in the raw material 14 conveyed onto the cylinder 11 is eccentrically disposed within the cylinder 11 and is electromagnetically induced by the rotating magnet 13 that rotates at a speed higher than the rotation speed of the cylinder 11. It is effectively separated by being pushed away from other objects in the raw material 14 under the force. Assuming that the surface magnetic flux density of the transport belt in the case where the conventional transport belt is provided is, for example, 3000 G (Gauss), in the present embodiment in which such a transport belt is omitted, the surface magnetic flux density of the cylindrical body 11 is reduced. 3500G, and as a result, the scatter separation capability of the raw material 14 is increased 1.36 times as compared with the conventional case.
[0023]
(5) In particular, since the non-magnetic metal in the raw material 14 transferred from the guide member 17 onto the cylinder 11 has no head difference in dropping (that is, no potential energy), the non-magnetic metal on the outer peripheral surface of the cylinder 11 Since the bouncing is suppressed and smoothly transferred to a certain position on the cylindrical body 11, the electromagnetic induction force by the rotating magnet 13 acting on the non-magnetic metal is always stable, so that the variation of the flight route of the non-magnetic metal is reduced. Smaller and more accurate separation will be achieved.
[0024]
Next, a nonmagnetic metal separator 30 according to a second embodiment of the present invention will be described with reference to FIG. The same components as those of the non-magnetic metal separator 10 are denoted by the same reference numerals, and detailed description thereof will be omitted.
The non-magnetic metal separation device 30 rotates clockwise (in the same direction as the raw material transport direction 16) at a predetermined outer peripheral speed U, and has a circular cross-section cylindrical body 31 made of a non-magnetic and non-conductive material. Are arranged eccentrically (eccentricity = f) at an upper position of the inner wall 32 of the cylindrical body 31 and are arranged with a small gap g from the upper part of the inner wall 32 of the cylindrical body 31. Different magnetic poles (S pole, N pole) ) Are alternately provided, and include a rotating magnet 33 that rotates clockwise at a high speed, and a belt conveyor 34 that supplies the raw material 14 to be sorted to an upper position of the cylindrical body 31. Hereinafter, these will be described in detail. The rotation center (axis) of the cylindrical body 31 is T, and the rotation center (axis) of the rotating magnet 33 is K. Assuming that a perpendicular line passing through the rotation center T is m and a straight line connecting the rotation center T and the rotation center K is n, the intersection angle between the perpendicular line m and the straight line n is γ.
[0025]
The driven roller 35 on the material discharge side of the belt conveyor 34 is made of a non-magnetic and non-conductive material, and is arranged in parallel with the axis T of the cylindrical body 31. The diameter h of the driven roller 35 is formed to be smaller than the diameter H of the cylindrical body 31, and the driven roller 35 is located above the cylindrical body 31 and the raw material is determined based on a vertical line m passing through the axis T of the cylindrical body 31. It is arranged on the near side with respect to the transport direction 16. The belt conveyor 34 includes a large-diameter drive roller 36 that is rotated clockwise through a speed reduction mechanism connected to a drive motor (not shown), and a small-diameter driven roller 35 that is disposed at the downstream end in the raw material transport direction 16. It is wound around an endless transport belt 37.
[0026]
The rotary drive mechanism of the cylindrical body 31 has the same configuration as the cylindrical body 11, while the rotary drive mechanism of the rotary magnet 33 has the same configuration as the rotary magnet 13, and a description thereof will be omitted.
In order to prevent the raw material 14 discharged from the discharge end of the belt conveyor 34 from dropping to the rear of the cylinder 31 on the outer surface of the cylinder 31, a large number of point-shaped drop prevention projections 38 are randomly formed. Is provided. The height of the fall prevention projection 38 is in the range of 5 to 10 mm. Therefore, as shown in FIG. 2, the raw material 14 falling from the belt conveyor 34 on the near side with respect to the raw material transport direction 16 with respect to the vertical line m passing through the axis T of the cylindrical body 31 The rotating magnet is securely mounted on the outer peripheral surface of the cylindrical body 31 and moved forward (clockwise) by the fall prevention projection 38, and is disposed inside the cylindrical body 31 with a small gap g. Under the action of the electromagnetic induction force based on the magnetic flux of 33, the non-magnetic metal in the raw material 14 is effectively separated.
[0027]
Further, a nonmagnetic metal separator 40 according to a third embodiment of the present invention will be described with reference to FIG. The same components as those of the nonmagnetic metal separators 10 and 30 are denoted by the same reference numerals, and detailed description thereof will be omitted.
The non-magnetic metal separation device 40 has a conveyance belt 42 guided by a small-diameter driven roller 41 provided at an end portion on the material discharge side, and near the front side (left side, that is, upstream side) of the driven roller 41. , A belt conveyor 44 having a space 43 immediately below the conveyor belt 42, and a small gap k with the conveyor belt 42, which are adjacent to each other in the circumferential direction and have different magnetic poles (S , And a rotating magnet 45 that rotates clockwise at high speed.
[0028]
A cylindrical body 46 made of a non-magnetic and non-conductive material is disposed outside the rotating magnet 45 with a gap s therebetween, and the rotating magnet 45 has an axis (rotation center) of the cylindrical body 46 having a diameter P. ) It is arranged coaxially with T.
A return roller 48 wound around the transport belt 42 is provided below the driven roller 41 of the belt conveyor 44 having a drive roller 47 on the upstream side. The transport path 49 is directed downward from the position of the driven roller 41.
[0029]
Unlike the cylindrical body 11, the cylindrical body 46 has a structure in which the raw material 14 is placed and rotated by the frictional force with the lower surface of the transport belt 42 driven in the raw material transport direction 16, and the electric motor and the speed reduction mechanism are omitted. Have been. On the other hand, the rotary drive mechanism of the rotary magnet 45 has the same configuration as the rotary magnet 13.
As shown in FIG. 3, the horizontal distance a from the axis T of the rotating magnet 45 to the final contact position of the driven roller 41 with the conveyor belt 42 needs to be minimized. If the horizontal distance a is small, The flying distance of the separated non-magnetic metal can be smaller, thereby improving the separation efficiency. Further, the transport belt 42 guided by the driven roller 41 is applied to the rotating magnet 45 with reference to a perpendicular line that is below the position of the driven roller 41 and passes through the final contact position of the driven belt 41 of the driven roller 41. It is preferable to direct the light beam in the direction of 0 to 30 degrees with respect to the perpendicular on the opposite side.
[0030]
FIG. 4 shows a main part of a non-magnetic metal separation device 40a which is a modification of the non-magnetic metal separation device 40. It should be noted that components similar to those of the non-magnetic metal separation device 40 are denoted by the same numbers with the alphabet (a), and detailed description thereof is omitted.
As compared with the non-magnetic metal separation device 40, the non-magnetic metal separation device 40a also has a rotating magnet 45a arranged closer to a part of the transport belt 42a guided by the driven roller 41a and the return roller 48a. Thereby, after most of the non-magnetic metal is separated from the raw material 14 by the rotating magnet 45a on the upstream side of the driven roller 41a, the non-magnetic metal which has not been separated and remains in the raw material 14 is transferred to the transport belt 42a. On the way down, they are separated again by the action of the magnetic field of the rotating magnet 45a.
[0031]
In order to achieve such a configuration, in the non-magnetic metal separation device 40a, the driven roller 41a has a very small diameter (about 0.2 times or less the diameter of the cylindrical body 46a), and the driven roller 41a and the return roller 48a The diameter and the position of the return roller 48a are determined so that the conveyance belt 42a guided by the above-described method is close to the cylindrical body 46a. In addition, the inclination angle η of the transport belt 42a guided by the driven roller 41a and the return roller 48a with respect to the vertical is about 5 to 10 degrees. Note that reference numeral 49a indicates a raw material transport path of the transport belt 42a.
[0032]
A nonmagnetic metal separation device 50 according to a fourth embodiment of the present invention will be described with reference to FIG. The same components as those of the nonmagnetic metal separators 10, 30, and 40 are denoted by the same reference numerals, and detailed description thereof will be omitted.
In the non-magnetic metal separation device 50, the transport belt 53 on the side of the raw material transport path 52 of the belt conveyor 51 is maintained substantially horizontally or at a downward slope of more than 0 degrees and less than 20 degrees with respect to the horizontal (this embodiment). In the embodiment, a driving roller 54 and a cylinder 55 acting as a driven roller are arranged, and a rotating magnet 56 that rotates at high speed (1000-3600 rpm) is provided inside the cylinder 55. A small-diameter return roller 57 is provided below the body 55, and a guide roller 58 smaller in diameter than the return roller 57 is disposed between the cylindrical body 55 and the return roller 57.
[0033]
Further, the angle θ at which the transport belt 53 contacts the cylindrical body 55 is limited to a range of 10 to 80 degrees, whereby the separation effect of the transfer belt 53 in the transfer direction 16 and the separation effect of the rotating magnet 56 can be improved. In addition, the nonmagnetic metal in the raw material 14 and the raw material slag can be efficiently separated, and the recovery efficiency is improved.
As in the case of the non-magnetic metal separator 40, the horizontal distance b from the axis T of the rotating magnet 56 to the outermost position of the conveyor belt 53 of the guide roller 58 is desirably as short as possible. The smaller the flying distance of the separated non-magnetic metal, the smaller the flying distance, thereby improving the separation efficiency. In consideration of this point, the diameter and the position of the guide roller 58 are determined. The transport belt 53 between the guide roller 58 and the return roller 57 is inclined downward toward the cylinder 55 with respect to the vertical, but is not limited to this, and is opposite to the cylinder 55 vertically or downward. It may be inclined to the side.
[0034]
The present invention is not limited to the above-described embodiments, and changes can be made without departing from the spirit of the present invention. For example, some or all of the above-described embodiments and modifications are described. The combination of the nonmagnetic metal separation device of the present invention with the combination is also included in the scope of the present invention.
As shown in FIGS. 1B and 1C, in the non-magnetic metal separation devices 10a and 10b, the driven roller 19 of the belt conveyor 15 and the guide member 25 that follows the driven roller 19 as compared with the non-magnetic metal separation device 10. , 26 are arranged so as to be vertically or tiltable with respect to the cylinder 11, but the invention is not limited thereto, and a belt conveyor having a driven roller and a guide member may be fixed to the cylinder 11 as necessary. You can keep it.
[0035]
Further, in the non-magnetic metal separation apparatus 10, only the driven roller 19 can be adjusted up and down, and the guide member 17 is inclined following the movement of the driven roller 19 to supply the raw material 14 to a predetermined position. Thus, substantially the same effects as those of the nonmagnetic metal separation devices 10a and 10b can be achieved. Conversely, for example, in FIG. 1A, the belt conveyor 15 is fixed, the cylindrical body 11 containing the rotating magnet 13 is lowered, and the guide member 17 is horizontally arranged according to the lowering of the cylindrical body 11. It is also possible to incline the prepared raw material transport path 22.
The inclination angles of the raw material conveying path 22 of the guide member 17 are set to 0, 15, and 30 degrees, but are not limited thereto, and may be 30 degrees at the maximum and -30 degrees at the minimum (that is, 30 degrees relative to the horizontal) depending on the situation. (Inclined downward).
[0036]
In the non-magnetic metal separator 30, a large number of point-like projections 38 are provided on the outer surface of the cylindrical body 31 to prevent the raw material 14 discharged from the belt conveyor 34 from falling backward. The present invention is not limited to this, and a number of linear drop prevention protrusions may be provided depending on the situation. Further, the height of the fall prevention projection 38 is set in the range of 5 to 10 mm, but is not limited to this, and may be set to a height in another range.
In the non-magnetic metal separation device 40, the rotating magnet 45 is arranged coaxially with respect to the axis of the cylinder 46, but is not limited to this. If necessary, the rotating magnet may be arranged with respect to the axis of the cylinder. It can also be arranged eccentrically. Further, although the return roller 48 is provided below the driven roller 41, the present invention is not limited to this, and the return roller may be omitted depending on the situation.
Although the size of the diameter of the driven rollers 19, 35, 41 is not mentioned, it is preferable that the diameter is not more than 20% of the diameter D, H, P of the cylindrical body.
[0037]
【The invention's effect】
In the non-magnetic metal separating apparatus according to claims 1 to 3 and the dependent claims, the driven roller of the belt conveyor having a diameter smaller than the diameter of the cylinder is a vertical line passing through the axis of the cylinder at a position above the cylinder. The guide member is disposed on the near side with respect to the vertical direction passing through the axis of the cylindrical body with respect to the raw material transport direction, and is discharged from the belt conveyor. The raw material is guided to the upper part of the cylindrical body, and it is possible to prevent the raw material from falling in the direction opposite to the raw material transport direction, so that all the raw material discharged from the belt conveyor is reliably and smoothly transferred to the rotating magnet. It can be supplied to the area where the electromagnetic induction force acts. Therefore, even if the amount of the raw material to be treated is large, the nonmagnetic metal in the raw material can be efficiently separated regardless of the ratio of the nonmagnetic metal in the raw material.
Furthermore, since the rotating magnet is eccentrically arranged at the upper position of the cylindrical body, a stronger magnetic field is applied to the supplied raw material, and since the magnetic force is smaller at the lower part of the cylindrical body, a magnetic substance is temporarily mixed in the raw material. However, there is no danger of staying at the lower part of the cylinder.
[0038]
In particular, in the non-magnetic metal separation device according to the second aspect, the height position of the driven roller and the inclination of the guide member are adjusted according to the conditions (type) of the raw material, the transport speed, the magnetic flux density and the rotational speed of the rotating magnet, and the like. By changing this, all the raw materials discharged from the belt conveyor can be reliably and smoothly supplied to the region where the electromagnetic induction force of the rotating magnet acts, so that the separation efficiency can be further improved.
In the non-magnetic metal separation device according to the third aspect, all the raw materials discharged from the belt conveyor can be reliably and more smoothly supplied to the region where the electromagnetic induction force of the rotating magnet acts. Efficiency can be further improved.
[0039]
In the non-magnetic metal separation device according to claims 4 and 5 and the dependent claim 11, the driven roller of the belt conveyor having a diameter smaller than the diameter of the cylindrical body passes through a vertical line passing through the axis of the cylindrical body at the upper position of the cylindrical body. As a reference, it is arranged on the near side with respect to the raw material transport direction, and since a number of linear or dot-like projections for drop prevention are provided on the outer surface of the cylindrical body, the raw material discharged from the belt conveyor is provided. The material can be reliably prevented from falling backward, and the raw material can be supplied to the region where the rotating magnet operates. Therefore, the raw material to be treated is large, and the nonmagnetic metal in the raw material can be efficiently separated regardless of the ratio of the nonmagnetic metal in the raw material.
In particular, in the non-magnetic metal separation device according to the fifth aspect, the falling of the raw material can be more effectively prevented, and the separation effect by the rotating magnetic field can be improved, so that the separation efficiency is improved.
[0040]
In the non-magnetic metal separation device according to the sixth to ninth aspects, when there is a magnetic metal in the raw material, the magnetic metal is attracted by the rotating magnet and is held at the strong magnetic field position of the conveyor belt. As a result, it is possible to prevent the magnetic metal in the separated raw material from adhering to the transport belt downstream of the driven roller, thereby eliminating the problem caused by the adhesion of the magnetic metal.
In particular, in the non-magnetic metal separating apparatus according to the seventh aspect, the distance between the raw material on the transport belt and the rotating magnet can be kept constant, so that stable separation can be performed and interference between the transport belt and the rotating magnet is avoided. It is possible to prevent each damage and it is safe.
[0041]
In the non-magnetic metal separation apparatus according to the eighth aspect, even if the raw material contains a small amount of magnetic metal, the non-magnetic metal is removed, and the raw material slag sent by the conveyor belt is swept downstream to convey the material. Since it does not stay on the belt, even if there is a magnetic metal in the raw material, there is no unexpected damage to the apparatus itself.
Further, in the non-magnetic metal separation device according to claim 9, since the magnetic field by the rotating magnet acts again on the raw material that falls along the conveying belt after passing the driven roller, the non-magnetic metal is separated in this region, The separation efficiency of the non-magnetic metal can be increased. In the non-magnetic metal separation device according to claim 10, the transport belt held horizontally or at a downward slope of more than 0 degree and less than 20 degrees with respect to the horizontal is in contact with the cylindrical body at an angle of 10 to 80 degrees. Since the non-magnetic metal in the raw material and the raw material slag can be efficiently separated, the recovery efficiency is improved.
In the non-magnetic metal separation device according to the eleventh aspect, the diameter of the driven roller is set to 20% or less of the diameter of the cylindrical body. Therefore, in the non-magnetic metal separation device according to the first to fifth aspects, the raw material can be more smoothly supplied to the separated cylinder, so that the separation efficiency is further improved. Further, in the non-magnetic metal separation device according to the seventh aspect, the axis of the driven roller can be made closer to the axis of the rotating magnet, and as a result, the non-magnetic metal separated by flying is separated. The degree of mixing of the magnetic metal is reduced, and more accurate non-magnetic metal separation can be performed.
[Brief description of the drawings]
FIGS. 1A, 1B, and 1C are configuration diagrams showing a nonmagnetic metal separation device according to a first embodiment of the present invention, and first and second modifications of the device, respectively. is there.
FIG. 2 is a configuration diagram of a non-magnetic metal separation device according to a second embodiment of the present invention.
FIG. 3 is a configuration diagram of a non-magnetic metal separation device according to a third embodiment of the present invention.
FIG. 4 is a main part configuration diagram of a modified example of the nonmagnetic metal separation device according to the third embodiment of the present invention.
FIG. 5 is a configuration diagram of a non-magnetic metal separation device according to a fourth embodiment of the present invention.
[Explanation of symbols]
10, 10a, 10b: non-magnetic metal separator, 11: cylindrical body, 12: inner wall, 13: rotating magnet, 14: raw material, 15: belt conveyor, 16: raw material transport direction, 17: guide member, 18: drive roller , 19: driven roller, 20: tension roller, 21: transport belt, 22: raw material transport path, 23: raw material transport path, 24: raw material discharge end, 25, 26: guide member, 27, 28: raw material transport path, 30 : Non-magnetic metal separation device, 31: cylindrical body, 32: inner wall, 33: rotating magnet, 34: belt conveyor, 35: driven roller, 36: drive roller, 37: transport belt, 38: projection for drop prevention, 40, 40a: Non-magnetic metal separation device, 41, 41a: driven roller, 42, 42a: conveyor belt, 43: space, 44: belt conveyor, 45, 45a: rotating magnet, 46, 46a: cylinder, 4 : Drive roller, 48, 48a: return roller, 49, 49a: raw material transport path, 50: non-magnetic metal separation device, 51: belt conveyor, 52: raw material transport path, 53: transport belt, 54: drive roller, 55: Cylindrical body, 56: rotating magnet, 57: return roller, 58: guide roller

Claims

Rotating at a predetermined outer peripheral speed, a cylindrical body having a circular cross section made of a non-magnetic and non-conductive material, eccentrically disposed at an upper position in the cylindrical body, and having a small gap with an upper inner wall of the cylindrical body. Arranged, alternately have different magnetic poles adjacent to each other in the circumferential direction, a rotating magnet that rotates at high speed, and a belt conveyor that supplies a raw material to be sorted to the upper position of the cylindrical body,
The driven roller on the raw material discharge side of the belt conveyor is made of a non-magnetic and non-conductive material, and is disposed in parallel with the axis of the cylinder, the diameter thereof is smaller than the diameter of the cylinder, and the diameter of the cylinder is further reduced. The upper position, disposed on the near side with respect to the raw material transport direction with reference to a perpendicular passing through the axis of the cylindrical body,
And, on the raw material discharge side of the belt conveyor, the raw material discharged from the belt conveyor is guided to the upper part of the cylindrical body, and further, the discharged raw material is prevented from dropping in a direction opposite to the raw material conveying direction. A non-magnetic and non-conductive material, and a guide member made of a non-magnetic and non-conductive material.

2. The non-magnetic metal separation device according to claim 1, wherein the driven roller and the guide member following the driven roller are arranged so as to be vertically adjustable relative to the cylindrical body. apparatus.

3. The non-magnetic metal separation device according to claim 1, wherein the raw material transport path of the guide member is within a range of ± 30 degrees with respect to the horizontal, and the raw material discharge of the guide member. 4. A nonmagnetic metal separation device, wherein an end is disposed on the near side in a raw material transport direction with respect to a perpendicular passing through an axis of the cylindrical body.

Rotating at a predetermined outer peripheral speed, a cylindrical body having a circular cross section made of a non-magnetic and non-conductive material, eccentrically disposed at an upper position in the cylindrical body, and having a small gap with an upper inner wall of the cylindrical body. Arranged, alternately have different magnetic poles adjacent to each other in the circumferential direction, a rotating magnet that rotates at high speed, and a belt conveyor that supplies a raw material to be sorted to the upper position of the cylindrical body,
The driven roller on the raw material discharge side of the belt conveyor is made of a non-magnetic and non-conductive material, and is disposed in parallel with the axis of the cylinder, the diameter thereof is smaller than the diameter of the cylinder, and the diameter of the cylinder is further reduced. The upper position, disposed on the near side with respect to the raw material transport direction with reference to a perpendicular passing through the axis of the cylindrical body,
The outer surface of the cylindrical body is provided with a large number of linear or dot-like projections for preventing the material discharged from the belt conveyor from dropping backward. apparatus.

5. The non-magnetic metal separation device according to claim 4, wherein the height of the fall prevention projection is in a range of 5 to 10 mm.

A belt conveyor having a transport belt guided by a small-diameter driven roller provided at the raw material discharge side end, and further having a space immediately below the transport belt located near the front side of the driven roller,
A rotating magnet that is arranged in the space, has a small gap with the transport belt, has alternately different magnetic poles adjacent to each other in the circumferential direction, and rotates at a high speed;
A non-magnetic metal separation device, wherein the non-magnetic metal in the raw material conveyed by the belt conveyor is separated by flying with the rotating magnet.

7. The non-magnetic metal separation device according to claim 6, wherein a cylindrical body made of a non-magnetic and non-conductive material is arranged with a gap outside the rotating magnet, and the rotating magnet is provided on a shaft of the cylindrical body. A non-magnetic metal separation device, which is arranged coaxially or eccentrically with respect to a core.

The non-magnetic metal separation device according to any one of claims 6 and 7, wherein a return roller is provided at a position below the driven roller, and the transport belt after being guided by the driven roller is used as the non-magnetic metal separating device. On the basis of a perpendicular below the position of the driven roller and passing through the final contact position of the driven belt of the driven roller, in a direction of 0 to 30 degrees with respect to the perpendicular on the opposite side to the rotating magnet. Non-magnetic metal separation device characterized by being oriented.

9. The non-magnetic metal separating apparatus according to claim 8, wherein the rotating magnet is close to a part of the transport belt guided by the driven roller and the return roller, and the non-magnetic material in the raw material that falls along the transport belt. A non-magnetic metal separation device for separating a magnetic metal by flying.

A drive roller for holding the conveyor belt substantially horizontally or at a downward gradient of more than 0 degree and less than 20 degrees with respect to the horizontal, a cylinder acting as a driven roller, and a small-diameter cylinder disposed below the cylinder. A non-magnetic metal separation device including a return roller and having a rotating magnet that rotates at a high speed inside the cylindrical body,
A non-magnetic metal separating apparatus, wherein a guide roller is disposed between the cylinder and the return roller, and an angle at which the transport belt contacts the cylinder is limited to a range of 10 to 80 degrees.

The non-magnetic metal separation device according to any one of claims 1 to 5, wherein a diameter of the driven roller is 20% or less of a diameter of the cylindrical body. .