JPH0679644B2 - Magnetic powder separation method - Google Patents
Magnetic powder separation methodInfo
- Publication number
- JPH0679644B2 JPH0679644B2 JP1822886A JP1822886A JPH0679644B2 JP H0679644 B2 JPH0679644 B2 JP H0679644B2 JP 1822886 A JP1822886 A JP 1822886A JP 1822886 A JP1822886 A JP 1822886A JP H0679644 B2 JPH0679644 B2 JP H0679644B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic powder
- magnetic
- hollow fiber
- suspension
- filled
- 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 - Lifetime
Links
- 239000006247 magnetic powder Substances 0.000 title claims description 37
- 238000000926 separation method Methods 0.000 title 1
- 239000012510 hollow fiber Substances 0.000 claims description 25
- 230000005291 magnetic effect Effects 0.000 claims description 25
- 239000000725 suspension Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 239000011882 ultra-fine particle Substances 0.000 claims description 11
- 239000002904 solvent Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 239000010419 fine particle Substances 0.000 description 7
- 238000011001 backwashing Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 239000003302 ferromagnetic material Substances 0.000 description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 1
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910001308 Zinc ferrite Inorganic materials 0.000 description 1
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- NQNBVCBUOCNRFZ-UHFFFAOYSA-N nickel ferrite Chemical compound [Ni]=O.O=[Fe]O[Fe]=O NQNBVCBUOCNRFZ-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/025—High gradient magnetic separators
- B03C1/031—Component parts; Auxiliary operations
- B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
- B03C1/034—Component parts; Auxiliary operations characterised by the magnetic circuit characterised by the matrix elements
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Filtering Materials (AREA)
- Combined Means For Separation Of Solids (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、磁性粉体の分離方法に関する。更に詳しく
は、強力な逆洗操作を不必要とする磁性粉体の分離方法
に関する。TECHNICAL FIELD The present invention relates to a method for separating magnetic powder. More specifically, it relates to a method for separating magnetic powder that does not require a strong backwashing operation.
〔従来の技術〕および〔発明が解決しようとする問題
点〕 従来は、磁性粉体けん濁液から磁性粉体を分離しようと
する場合、細線状や網状の強磁性体材料を用いて捕集す
ることが行われているが、このような方法では、印加磁
場を解除しても残留磁化があるので、微細な磁性粉体は
強磁性体材料に捕集されたままであり、それを分離する
ためには強力な逆洗を必要としている。[Prior Art] and [Problems to be Solved by the Invention] Conventionally, when magnetic powder is to be separated from a magnetic powder suspension, a fine linear or reticulated ferromagnetic material is used to collect the magnetic powder. However, in such a method, even if the applied magnetic field is released, since there is residual magnetization, the fine magnetic powder remains trapped in the ferromagnetic material and separates it. In order to need a strong backwash.
本発明者は、このような強力な逆洗を必要とすることな
く、捕集された磁性粉体の分離を行ない得るような方法
を求めて種々検討した結果、強磁性体材料に代えて超常
磁性を有する磁性超微粒子を以下に述べるような特定の
状態で捕集材として用いることにより、かかる課題が効
果的に解決されることを見出した。The present inventor has conducted various investigations as to a method capable of separating the collected magnetic powder without requiring such a strong backwash, and as a result, replaced with a ferromagnetic material by a supernormal method. It was found that such problems can be effectively solved by using magnetic ultrafine particles having magnetism in a specific state as described below.
〔問題点を解決するための手段〕および〔作用〕 従って、本発明は磁性粉体の分離方法に係り、磁性粉体
の分離は、超常磁性を有する磁性超微粒子を充填した中
空糸から形成した筒状体内に磁性粉体けん濁液を流し、
そこに磁場を印加することにより中空糸外表面に磁性粉
体を捕集することにより行われる。[Means for Solving Problems] and [Operation] Therefore, the present invention relates to a method for separating magnetic powder, wherein the magnetic powder is separated from a hollow fiber filled with magnetic ultrafine particles having superparamagnetism. Pour the magnetic powder suspension into the cylinder,
It is carried out by applying a magnetic field there to collect the magnetic powder on the outer surface of the hollow fiber.
超常磁性を有する磁性超微粒子としては、例えばマグネ
タイト、ニッケル−フェライト、コバルト−フェライ
ト、マンガン−フェライト、ニッケル・亜鉛−フェライ
ト、コバルト・亜鉛−フェライト、マンガン・亜鉛−フ
ェライト、バリウム−フェライトなどが用いられる。As the magnetic ultrafine particles having superparamagnetism, for example, magnetite, nickel-ferrite, cobalt-ferrite, manganese-ferrite, nickel-zinc-ferrite, cobalt-zinc-ferrite, manganese-zinc-ferrite, barium-ferrite, etc. are used. .
これらの磁性微粒子を充填する中空糸は、膜厚約0.5〜1
mm程度の高分子中空糸、例えばポリエチレン、ポリスチ
レン、ポリエチレンテレフタレート、酢酸セルロースな
どから製造された中空糸であり、これらの中空糸は筒状
体の形で用いられる。ただし、中空糸だけで筒状体を形
成させることは容易ではないので、一般には任意断面形
状の筒状鞘体の内面側にその長さ方向あるいはらせん状
に中空糸を並べ、接着剤で貼着させる形で筒状体を形成
させる。筒状体を形成する中空糸内には、一般に磁性微
粒子を約0.3〜5.0g/cm3程度の崇密度で充填させ、使用
する。The hollow fiber filled with these magnetic fine particles has a film thickness of about 0.5 to 1
A polymer hollow fiber having a size of about mm, for example, a hollow fiber produced from polyethylene, polystyrene, polyethylene terephthalate, cellulose acetate or the like, and these hollow fibers are used in the form of a tubular body. However, since it is not easy to form a tubular body with only hollow fibers, generally, the hollow fibers are arranged in the length direction or in a spiral shape on the inner surface side of a tubular sheath body having an arbitrary cross-sectional shape, and the hollow fibers are attached with an adhesive. A tubular body is formed in the form of wearing. In the hollow fiber forming the tubular body, generally, magnetic fine particles are filled at a density of about 0.3 to 5.0 g / cm 3 and used.
このように構成される磁性超微粒子充填中空糸筒状体内
に、磁性粉体けん濁液が流される。磁性粉体けん濁液と
しては、Fe、Co、Niなどの金属またはこれらの合金、更
に上記の如き超常磁性を有する磁性超微粒子などの磁性
粉体で粒径が約30〜200Åの微細なものを、水または炭
化水素、ケトン、アルコールなどの有機溶媒に約40重量
％以下の濃度で分散させたけん濁液が一般に用いられ
る。The magnetic powder suspension is caused to flow into the hollow ultrafine particle-filled hollow fiber tubular body having the above-described structure. As the magnetic powder suspension, magnetic powder such as Fe, Co, Ni and other metals or alloys thereof, and magnetic ultrafine particles having the above superparamagnetism and having a particle size of about 30 to 200Å Generally, a suspension is prepared by dispersing water in water or an organic solvent such as a hydrocarbon, a ketone or an alcohol at a concentration of about 40% by weight or less.
磁性粉体の分離は、磁性粉体けん濁液を流す際に、そこ
に磁場を印加することにより行われる。磁場の印加によ
り、磁性超微粒子を充填し、筒状体を形成している中空
糸の外表面に磁性粉体が捕集される。The magnetic powder is separated by applying a magnetic field to the magnetic powder suspension when the magnetic powder suspension is flowed. By applying the magnetic field, the magnetic ultrafine particles are filled and the magnetic powder is collected on the outer surface of the hollow fiber forming the cylindrical body.
具体的には、例えば第１図に示されるような方法によっ
てこの処理が行われる。即ち、筒状鞘体などに納められ
た磁性超微粒子充填中空糸筒状体１の周囲に電磁石2,
2′を設置し、かかる筒状体内に磁性粉体けん濁液３を
ポンプ４を経由して送り込む。この状態で磁場を印加す
ると、磁性粉体は中空糸の外表面に捕集され、けん濁媒
体はライン５から排出される。捕集された中空糸外表面
の磁性粉体は、電磁石への通電を止め、印加磁場を解除
した後、逆洗用溶媒６をポンプ７を経由して筒状体内に
送り込むと、磁性粉体は逆洗用溶媒と共にライン８から
排出される。ここで、逆洗用溶媒としてはメタノール、
エタノール、ｎ−ヘキサン、アセトンなどが用いられる
ので、それからの磁性粉体の分離は容易である。Specifically, this processing is performed, for example, by the method shown in FIG. That is, the electromagnets 2, 2, etc. are provided around the hollow fiber tubular body 1 filled with magnetic ultrafine particles contained in a tubular sheath body or the like.
2'is installed and the magnetic powder suspension 3 is fed into the cylindrical body via the pump 4. When a magnetic field is applied in this state, the magnetic powder is collected on the outer surface of the hollow fiber and the suspension medium is discharged from the line 5. The collected magnetic powder on the outer surface of the hollow fiber is supplied with the backwashing solvent 6 through the pump 7 into the tubular body after the energization of the electromagnet is stopped and the applied magnetic field is released. Is discharged from the line 8 together with the backwashing solvent. Here, methanol as the backwash solvent,
Since ethanol, n-hexane, acetone or the like is used, the magnetic powder can be easily separated from it.
本発明に係る磁性粉体の分離方法においては、非磁性材
料製の中空糸内に磁性微粒子を充填し、この磁性微粒子
は超常磁性なので、そこに磁場を印加すればけん濁液中
の磁性粉体を効率的に捕集し、印加磁場を解除すれば残
留磁化がゼロとなり、そのため捕集された微細な磁性粉
体が簡単な逆洗方法などにより容易に分離、回収され
る。また、このような処理において、磁性超微粒子充填
中空糸筒状体（モジュール）を直列または並列に配置す
ると、大量の磁性粉体けん濁液の処理が可能となる。In the method for separating magnetic powder according to the present invention, magnetic fine particles are filled in a hollow fiber made of a non-magnetic material, and since the magnetic fine particles are superparamagnetic, the magnetic powder in the suspension liquid can be applied by applying a magnetic field to the magnetic fine particles. When the applied magnetic field is released, the residual magnetization becomes zero, so that the collected fine magnetic powder can be easily separated and recovered by a simple backwashing method. Further, in such a treatment, a large amount of the magnetic powder suspension can be treated by arranging the magnetic ultrafine particle-filled hollow fiber tubular bodies (modules) in series or in parallel.
次に、実施例について本発明を説明する。 Next, the present invention will be described with reference to examples.
実施例 外径5mm、内径3mmのポリエチレンテレフタレート製中空
糸の内部に、平均粒径100Åのマグネタイト微粒子を2.0
g/cm3の崇密度で充填し、このようなマグネタイト微粒
子充填中空糸を外径20mm、内径18mm、長さ30cmの円筒状
鞘体の内面側に長さ方向に一層分並べ、エポキシ系接着
剤で貼着、固定された。Example A magnetite fine particle having an average particle size of 100Å was added to the inside of a polyethylene terephthalate hollow fiber having an outer diameter of 5 mm and an inner diameter of 3 mm.
Filled at a density of g / cm 3 , magnetite fine particle-filled hollow fibers are arranged in the lengthwise direction on the inner surface of a cylindrical sheath with an outer diameter of 20 mm, an inner diameter of 18 mm, and a length of 30 cm. It was attached and fixed with an agent.
このようなモジュール内へ、磁性粉体けん濁液（粒径30
〜100ÅのFe3O4超微粒子の約５重量％水性けん濁液）を
毎分10mlの流量で流した。この際、モジュール外側の電
磁石に通電すると、磁性粉体は中空糸の外表面に捕集さ
れる。電磁石のスイッチを切り、印加磁場を解除した後
メタノールで逆洗すると、磁性粉体は中空糸外表面から
洗い流され、得られたメタノールけん濁液からは真空乾
燥法など任意の手段によって、容易に磁性粉体を分離、
回収することができた。A magnetic powder suspension (particle size 30
˜100 Å Fe 3 O 4 ultrafine particles (about 5 wt% aqueous suspension) was flowed at a flow rate of 10 ml / min. At this time, when the electromagnet outside the module is energized, the magnetic powder is collected on the outer surface of the hollow fiber. When the electromagnet is switched off, the applied magnetic field is released, and then backwashed with methanol, the magnetic powder is washed away from the outer surface of the hollow fiber, and the resulting methanol suspension can be easily washed by any means such as vacuum drying. Separate magnetic powder,
I was able to recover it.
第１図は、本発明方法の一態様を示す概略図である。 （符号の説明） １……磁性超微粒子充填中空糸筒状体 ２……電磁石 ３……磁性粉体けん濁液 ６……逆洗用溶媒 FIG. 1 is a schematic view showing one embodiment of the method of the present invention. (Explanation of symbols) 1 ... Hollow fiber tubular body filled with magnetic ultrafine particles 2 ... Electromagnet 3 ... Magnetic powder suspension 6 ... Backwashing solvent
Claims (2)
中空糸から形成した筒状体内に磁性粉体けん濁液を流
し、そこに磁場を印加することにより中空糸外表面に磁
性粉体を捕集することを特徴とする磁性粉体の分離方
法。1. A magnetic powder suspension is caused to flow into a cylindrical body formed from hollow fibers filled with magnetic ultrafine particles having superparamagnetism, and a magnetic field is applied to the cylindrical liquid, whereby magnetic powder is applied to the outer surface of the hollow fibers. A method for separating magnetic powder, characterized by collecting.
磁場解除後溶媒で逆洗する特許請求の範囲第１項記載の
磁性粉体の分離方法。2. The method for separating magnetic powder according to claim 1, wherein the collected magnetic powder on the outer surface of the hollow fiber is backwashed with a solvent after releasing the applied magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1822886A JPH0679644B2 (en) | 1986-01-31 | 1986-01-31 | Magnetic powder separation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1822886A JPH0679644B2 (en) | 1986-01-31 | 1986-01-31 | Magnetic powder separation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62180717A JPS62180717A (en) | 1987-08-08 |
| JPH0679644B2 true JPH0679644B2 (en) | 1994-10-12 |
Family
ID=11965803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1822886A Expired - Lifetime JPH0679644B2 (en) | 1986-01-31 | 1986-01-31 | Magnetic powder separation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0679644B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7316341B2 (en) | 2004-02-20 | 2008-01-08 | Black & Decker Inc. | Adjustable exhaust assembly for pneumatic fasteners |
-
1986
- 1986-01-31 JP JP1822886A patent/JPH0679644B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7316341B2 (en) | 2004-02-20 | 2008-01-08 | Black & Decker Inc. | Adjustable exhaust assembly for pneumatic fasteners |
| US7458492B2 (en) | 2004-02-20 | 2008-12-02 | Black & Decker Inc. | Dual mode pneumatic fastener actuation mechanism |
| US7484649B2 (en) | 2004-02-20 | 2009-02-03 | Black & Decker Inc. | Adjustable exhaust assembly for pneumatic fasteners |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62180717A (en) | 1987-08-08 |
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