JP2968069B2 - Magnetic separation device - Google Patents
Magnetic separation deviceInfo
- Publication number
- JP2968069B2 JP2968069B2 JP3046330A JP4633091A JP2968069B2 JP 2968069 B2 JP2968069 B2 JP 2968069B2 JP 3046330 A JP3046330 A JP 3046330A JP 4633091 A JP4633091 A JP 4633091A JP 2968069 B2 JP2968069 B2 JP 2968069B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- filter
- liquid
- magnetic particles
- separation device
- 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
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属加工や機械部品の
摩耗などにより発生し加工油や洗浄液、油圧作動油等に
混入してくる磁性粒子、水に接触するタンクや配管内か
ら発生し水中に混入してくる錆、鉄バクテリアなどの磁
性粒子、あるいは鉱石を粉砕した粉体液中に含まれる磁
性有用金属（例：Ｎｉ，Ｃｏ等）および磁性体に含まれ
る有用金属（例：Ｇａ，Ｎｂ等）の粒子などの磁性粒子
を液体中から連続的に除去する磁気分離装置に関するも
のである。BACKGROUND OF THE INVENTION The present invention relates to magnetic particles which are generated by metal working or abrasion of machine parts and are mixed into a processing oil, a cleaning liquid, a hydraulic oil, etc., and are generated from a tank or a pipe which comes into contact with water. Magnetic particles such as rust and iron bacteria mixed in water, or magnetic useful metals (eg, Ni, Co, etc.) contained in powder liquid obtained by grinding ore and useful metals contained in a magnetic material (eg, Ga, The present invention relates to a magnetic separation device for continuously removing magnetic particles such as particles of Nb) from a liquid.
【０００２】[0002]
【従来の技術】現在産業の中核をなす製造業においては
液体中に混入する磁性粒子の除去は必要不可欠である。
例えば、製鉄業や金属工業、自動車等のプレス加工業に
おいては、その製品工程中で使用される洗浄水、圧延
油、冷却水、加工油等に混入する多量の磁性粒子が製品
表面の清浄度を悪化させ製品の疵発生原因にもなってい
る。また、淡水、浄水等の処理設備においてもタンクや
配管から発生する錆や鉄バクテリアが水道水中の赤水な
どの原因となりその除去のため大がかりな浄化槽や分離
槽が必要となり設備コストが増大している。また、山元
における鉱石中の磁性体を含む有用成分の濃化は、長年
の資源の開発により高濃度資源が減り低濃度資源の利用
も必要となってきた昨今の精錬業において益々必要とな
っている。2. Description of the Related Art In the manufacturing industry which is currently the core of the industry, it is essential to remove magnetic particles mixed in a liquid.
For example, in the iron and steel industry, the metal industry, and the stamping industry such as automobiles, a large amount of magnetic particles mixed in washing water, rolling oil, cooling water, processing oil, etc. used in the product process causes the cleanliness of the product surface. And also causes the occurrence of flaws in the product. In addition, even in treatment facilities for fresh water, purified water, etc., rust and iron bacteria generated from tanks and pipes cause red water in tap water, etc., and large-scale septic tanks and separation tanks are required for their removal, increasing equipment costs. . In addition, the concentration of useful components including magnetic substances in ores at Yamamoto has become increasingly necessary in the recent refining industry, where high-concentration resources have been reduced and low-concentration resources have been required due to the development of resources over many years. I have.
【０００３】そこでこれら液中の磁性粒子を分離し濃化
して系外へ排出することは、製造業における製品品質や
水処理設備における設備コストの切下げ、有用金属の選
鉱等によい結果をもたらすこととなる。従来、液体中に
混入している磁性粒子の磁気分離装置としては永久磁石
を用いたマグネットロール型のものが有名である。これ
は連続的に回転するマグネットロール表面近傍に液体を
流しロール表面上に磁性粒子を吸着するものである。吸
着した磁性粒子はロールの回転に伴いロール表面に付着
したままスクレーパーに運ばれロール表面上から掻き取
られ分離される。この方法はロール表面近傍を遅い速度
で通過する磁性粒子しか除去できないため除去効率が低
い。また、スクレーパーによる掻き取り分離の効率が低
いことも問題である。[0003] Separating and concentrating the magnetic particles in these liquids and discharging them to the outside of the system can lead to good results in reducing product quality in the manufacturing industry, equipment costs in water treatment facilities, and beneficiation of useful metals. Becomes Conventionally, as a magnetic separation device for separating magnetic particles mixed in a liquid, a magnet roll type using a permanent magnet is well known. In this method, a liquid flows near the surface of a continuously rotating magnet roll, and magnetic particles are adsorbed on the surface of the roll. The adsorbed magnetic particles are carried to the scraper while being attached to the roll surface as the roll rotates, and are scraped off from the roll surface and separated. This method has a low removal efficiency because it can remove only magnetic particles passing at a low speed near the roll surface. Another problem is that the efficiency of scraping and separation by the scraper is low.
【０００４】また、特開昭５４−８６８７８号公報の如
く電磁石を用いた大型の磁気分離装置も有名である。こ
れはステンレスワイヤーなどの磁性細線から構成される
フィルターを電磁石により磁化させ、フィルター中に磁
性粒子を含む液体を通過させることにより磁性細線上に
磁性粒子を吸着分離する。その後、電磁石を切ることに
よりフィルターに懸かる磁界をなくし同時に逆洗水をフ
ィルター中に吹き込んで細線上に付着した磁性粒子を分
離し系外へ排出する。この方法はステンレスワイヤーを
強く磁化するため電磁石を用いねばならず装置コスト、
運転に伴う消費電力共に大きくなり経済的に不利であ
る。また、電磁石による磁界を切ってもステンレスワイ
ヤーには残留磁化が残っており磁性粒子の分離効率を高
めるには長いフィルター逆洗時間が必要であり装置稼動
率を低くしている。従って、液体中の磁性粒子を低コス
ト高効率で除去し、しかも少ない時間で高効率に系外に
排出することのできる磁気分離装置が求められている。A large-sized magnetic separation device using an electromagnet is also famous as disclosed in Japanese Patent Application Laid-Open No. 54-86878. In this method, a filter composed of a magnetic thin wire such as a stainless steel wire is magnetized by an electromagnet, and a liquid containing magnetic particles is passed through the filter to adsorb and separate the magnetic particles on the magnetic fine wire. Then, the magnetic field suspended on the filter is eliminated by turning off the electromagnet, and at the same time, the backwash water is blown into the filter to separate the magnetic particles attached on the fine wire and discharge the magnetic particles out of the system. In this method, an electromagnet must be used to strongly magnetize the stainless steel wire, and equipment costs must be increased.
The power consumption associated with the operation increases, which is economically disadvantageous. Further, even if the magnetic field by the electromagnet is cut off, the residual magnetization remains in the stainless wire, and a long filter backwashing time is required to increase the separation efficiency of the magnetic particles, which lowers the operation rate of the apparatus. Therefore, there is a need for a magnetic separation device capable of removing magnetic particles in a liquid at low cost and high efficiency and discharging the magnetic particles out of the system in a short time with high efficiency.
【０００５】[0005]
【発明が解決しようとする課題】本発明は前述した種々
の問題点を有利に解決する磁気分離装置を提供すること
を目的とするものである。SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic separation device which can advantageously solve the above-mentioned various problems.
【０００６】[0006]
【課題を解決するための手段】本発明の要旨は、非磁性
ケーシング内に配置された強磁性アモルファス合金細線
から成るフィルターメディアを外部より磁化させ、ケー
シングに流入する浄化対象液体中の懸濁磁性粒子を吸着
除去する磁気分離装置において、ケーシング外部の着磁
装置をケーシングから脱着自在に設け、かつフィルター
メディア中に気体噴射管を設けて磁気フィルターを洗浄
する機能を具備してなる磁気分離装置にある。SUMMARY OF THE INVENTION The gist of the present invention is to externally magnetize a filter medium comprising a ferromagnetic amorphous alloy thin wire disposed in a non-magnetic casing, and to suspend magnetized filter medium in a liquid to be purified which flows into the casing. In a magnetic separation device for adsorbing and removing particles, a magnetic separation device provided with a function of washing a magnetic filter by providing a magnetizing device outside the casing detachably from the casing and providing a gas injection pipe in a filter medium. is there.
【０００７】まず、本発明を鋼板洗浄工程に用いた浄化
システムについて図１を用いて説明する。例えば、鋼板
洗浄工程１６に用いられた洗浄液中には鋼板に付着して
いた磁性粒子が混入しており、該洗浄液は経路Ａ1 を通
って磁気分離装置１７に送られ磁性粒子を除去された
後、ポンプ２０にて圧送され経路Ａ2 を通って循環タン
ク１８に溜められた後、再度鋼板洗浄工程に使用され
る。また、鋼板洗浄工程１６に用いられた洗浄液を経路
Ａ3 を通して循環タンク１８に溜め、経路Ａ4 ，経路Ａ
2 を通してその途中の磁気分離装置１７にて浄化するこ
とにより該循環タンク１８を浄化するという浄化システ
ムも行なわれている。First, a purification system using the present invention in a steel plate cleaning step will be described with reference to FIG. For example, in the washing solution used in the steel plate cleaning process 16 is contaminated with magnetic particles adhering to the steel sheet, the cleaning solution was removed sent magnetic particles in the magnetic separator 17 through the path A 1 after, after accumulated in the circulation tank 18 through the path a 2 is pumped by pump 20, it is used again to the steel plate cleaning process. Further, it accumulated in the circulation tank 18 the cleaning liquid used in the steel plate cleaning process 16 through the path A 3, path A 4, route A
A purification system is also practiced in which the circulation tank 18 is purified by purifying in a magnetic separation device 17 in the middle of the circulation tank 18 through 2 .
【０００８】いずれの浄化システムにおいても時間の経
過と共に磁気分離装置１７の磁性粒子除去性能が低下し
てくるため、定期的にあるいは除去性能低下度に応じて
逆洗と呼ばれる磁気分離装置１７のフィルター洗浄を行
なうこととなる。逆洗時は、経路Ｂ1 より逆洗液体
（水、洗浄油等）が、経路Ｂ2より逆洗気体（空気、蒸
気等）が投入され、両者からなる気液二相流によりフィ
ルター逆洗が行われる。排出された磁性粒子は経路Ｂ3
を通って排出タンク１９に溜められる。この方法を繰り
返し行うことにより、鋼板洗浄水中の磁性粒子を連続的
に高効率で除去している。In any of the purification systems, the magnetic particle removal performance of the magnetic separation device 17 decreases with the passage of time. Therefore, the filter of the magnetic separation device 17 called backwashing is periodically or in accordance with the degree of reduction in the removal performance. Cleaning will be performed. During backwashing, backwash liquid (water, wash oil, etc.) than the path B 1 is, backwash gas (air, steam, etc.) than the path B 2 is turned, the filter backwash by gas-liquid two-phase flow consisting of both Is performed. The ejected magnetic particles pass through path B 3
Through the discharge tank 19. By repeating this method, the magnetic particles in the steel plate washing water are continuously and efficiently removed.
【０００９】図２（ａ）は本発明における磁性粒子除去
状態を示す説明図である。まず、浄化対象液体がポンプ
１により液供給配管２を通して強磁性フィルター３へ送
られる。同時にフィルター３は非磁性ケーシング４の外
部から着磁用マグネット５により着磁されており、図２
（ａ）中の矢印の如く液体がフィルター中を通過する間
に液体中に混入する磁性粒子は強磁性フィルター上に捕
獲される。浄化された液体は液戻し配管６を通して循環
タンクへ戻される。FIG. 2A is an explanatory view showing a state of removing magnetic particles according to the present invention. First, the liquid to be purified is sent to the ferromagnetic filter 3 through the liquid supply pipe 2 by the pump 1. At the same time, the filter 3 is magnetized by a magnetizing magnet 5 from the outside of the non-magnetic casing 4.
As shown by the arrow in (a), magnetic particles mixed into the liquid while the liquid passes through the filter are captured on the ferromagnetic filter. The purified liquid is returned to the circulation tank through the liquid return pipe 6.
【００１０】図２（ｂ）は本発明におけるフィルター逆
洗状態を示す説明図である。例えば、ポンプ１を停止さ
せることにより配管２を通してケーシング４中に満たさ
れている浄化対象液体を抜いた後、液供給配管２のバル
ブ１１を閉め逆洗液供給配管７によりケーシング４中に
逆洗液を満たし配管６のバルブ１２を閉める。その時、
図２（ｂ）の如くマグネット５をフィルター部から外し
同時に配管７から逆洗液を、逆洗気体供給配管８を通し
てノズル９から逆洗気体をフィルター３内に吹き込みフ
ィルターに付着した磁性粒子を気液二相流により押し流
し、廃液用配管１０を通して外部へ排出する。また、浄
化対象液体が水などでケーシング容量分の排出が許され
るならば、ケーシング内液の置換を行わず、バルブ１
１，１２を閉めマグネット５を外し、配管７から逆洗液
をノズル９から逆洗気体を直接フィルター３中の浄化対
象液体に吹き込みフィルター逆洗を行うことも逆洗時間
を短くし装置稼動率の点で有利である。このフィルター
再生工程の後、再びフィルターは着磁され浄化対象液体
からの磁性粒子除去を行い、これが繰り返される。FIG. 2B is an explanatory view showing a filter backwash state in the present invention. For example, after the pump 1 is stopped to remove the liquid to be purified filled in the casing 4 through the pipe 2, the valve 11 of the liquid supply pipe 2 is closed, and the backwash liquid is supplied into the casing 4 by the backwash liquid supply pipe 7. Fill the liquid and close the valve 12 of the pipe 6. At that time,
As shown in FIG. 2 (b), the magnet 5 is removed from the filter portion, and at the same time, the backwash liquid is blown from the pipe 7 and the backwash gas is blown from the nozzle 9 into the filter 3 through the backwash gas supply pipe 8 to remove the magnetic particles attached to the filter. It is flushed out by the liquid two-phase flow, and is discharged to the outside through the waste liquid pipe 10. Also, if the liquid to be purified is allowed to be drained by water or the like for the capacity of the casing, the liquid in the casing is not replaced and the valve 1 is replaced.
Closing the magnets 1 and 12, removing the magnet 5, injecting the backwash liquid from the pipe 7 and the backwash gas directly from the nozzle 9 into the liquid to be purified in the filter 3 and performing the filter backwash also shortens the backwash time and reduces the equipment operation rate. It is advantageous in the point. After this filter regeneration step, the filter is magnetized again to remove magnetic particles from the liquid to be purified, and this is repeated.
【００１１】本発明は、磁性粒子除去時に高い除去効率
を示すことのできるように強磁性フィルターにステンレ
スワイヤーの十数倍の磁化率を持つ磁気特性のよいアモ
ルファス合金細線を用いること、また、このアモルファ
ス合金細線はフィルター逆洗時にステンレスワイヤーの
十分の一の保磁力で残留磁気の小さいため、高いフィル
ター逆洗効率を示す点で有利なこと、フィルター逆洗時
に洗浄効果の大きい気液二相流を用いていることの３点
を大きな特徴としている。According to the present invention, an amorphous alloy fine wire having good magnetic properties having a magnetic susceptibility ten and several times higher than that of a stainless steel wire is used for a ferromagnetic filter so that a high removal efficiency can be exhibited when removing magnetic particles. Amorphous alloy fine wire is advantageous in showing high filter backwashing efficiency due to small coercive force of one tenth of stainless steel wire during filter backwashing, and gas-liquid two-phase flow with large cleaning effect during filter backwashing The major feature of this method is that it uses.
【００１２】[0012]
【実施例】製鉄業の冷延鋼板製造プロセスにおいて、冷
間圧延の後工程である鋼板洗浄ラインで用いられている
洗浄水を本発明の磁気分離装置により浄化し、各種逆洗
方法におけるフィルター逆洗効率の評価を行った。ま
た、該洗浄水に対して各種磁気分離装置による連続浄化
テストを行い浄化能力の比較を行った。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a steel-rolled steel sheet manufacturing process, washing water used in a steel sheet washing line, which is a post-step of cold rolling, is purified by a magnetic separation device of the present invention, and a filter reverse in various back washing methods is used. The washing efficiency was evaluated. The cleaning water was subjected to a continuous purification test using various magnetic separation devices, and the purification abilities were compared.
【００１３】図３は、本発明の磁気分離装置における各
種逆洗方法に対する逆洗効率の変化を示したものであ
る。本発明の磁気分離装置にて該洗浄水の浄化を行い、
フィルター内に一定量の磁性粒子が蓄積されたところ
で、逆洗液体として水を、逆洗気体としてはエアあるい
は蒸気を用いてフィルター逆洗テストを行なった。水の
みによる逆洗では、逆洗効率が５０％程度であったが、
水の中にエアまたは蒸気を吹き込んだ気液二相流を逆洗
流体として用いた際には３分以内で１００％の逆洗効率
を示すことができた。このことは気液二相流の逆洗能力
が高くフィルター逆洗方法として有効であることを示し
ている。この逆洗条件は次の通りである。 フィルター内逆洗水流速……２．５mm／sec エアおよび蒸気吹込み圧力…３．０kg／cm2 逆洗時間………………………３分 図４は、該洗浄水に対して各種磁気分離装置を用いて連
続浄化テストを行った結果である。該ライン系内での磁
性粒子発生速度は１kg／hrであり、洗浄水の浄化を何も
行わなければ磁性粒子濃度は増え続ける。該ラインに対
して各種磁気分離装置により洗浄水中の磁性粒子濃度を
低く維持することを試みた。これらのテストは全て、循
環タンクを洗浄して新しい洗浄水をタンクに注入した後
行った。FIG. 3 shows the change in the backwashing efficiency for various backwashing methods in the magnetic separation apparatus of the present invention. Purification of the washing water by the magnetic separation device of the present invention,
When a certain amount of magnetic particles had accumulated in the filter, a filter backwash test was performed using water as the backwash liquid and air or steam as the backwash gas. Backwashing efficiency with water alone was about 50%,
When a gas-liquid two-phase flow in which air or steam was blown into water was used as a backwashing fluid, a backwashing efficiency of 100% could be exhibited within 3 minutes. This indicates that the gas-liquid two-phase flow has a high backwashing ability and is effective as a filter backwashing method. The conditions for this backwash are as follows. Filter the backwash water flow rate ...... 2.5mm / sec air and steam blow pressure ... 3.0 kg / cm 2 backwashing time ........................... 3 minutes 4, to the cleaning water It is a result of performing a continuous purification test using various magnetic separation devices. The generation speed of magnetic particles in the line system is 1 kg / hr, and the concentration of magnetic particles continues to increase unless cleaning water is purified. An attempt was made to keep the concentration of magnetic particles in the washing water low for the line by using various magnetic separation devices. All of these tests were performed after flushing the circulation tank and filling the tank with fresh wash water.
【００１４】まず、マグネットロール型磁気分離装置に
よる浄化テストでは、もともと装置の持つ除去効率が低
いために洗浄水中の磁性粒子濃度は早い内に非常に高い
レベルに達してしまっている。また、電磁石とステンレ
スワイヤーを用いた磁気分離装置で磁性粒子除去時間６
０分、逆洗時間１０分、処理流量１０００／min でテス
トを行った結果では、ステンレスワイヤーの残留磁化が
高いためにフィルターの再生が十分に行われず、時間が
経過するにつれてフィルターの目詰りが起こり磁性粒子
除去効率が低下し系内の磁性粒子濃度は徐々に増加して
しまっている。First, in a purification test using a magnet roll-type magnetic separation device, the concentration of magnetic particles in the washing water has reached a very high level sooner because of the inherently low removal efficiency of the device. In addition, the magnetic separation device using an electromagnet and a stainless steel wire removes the magnetic particles for 6 hours.
Tests performed at 0 minutes, a backwash time of 10 minutes, and a processing flow rate of 1000 / min show that the filter was not sufficiently regenerated due to the high residual magnetization of the stainless steel wire, and the filter clogged as time passed. As a result, the efficiency of removing magnetic particles has decreased, and the concentration of magnetic particles in the system has gradually increased.
【００１５】これに反して、本発明の磁気分離装置によ
るテストでは、磁性粒子除去時間６０分、逆洗時間３
分、処理流量４００／min で洗浄水の浄化を行ったとこ
ろ、図に示す如く系内の平衡濃度を約７０ppm と非常に
低いレベルに抑えることができた。これは本発明の磁気
分離装置においては磁化されたアモルファス合金細線の
磁性粒子除去効率の高いことに加えて、アモルファス合
金細線と気液二相流の組合せによる高いフィルター逆洗
効果により、フィルターの目詰りもなく常に高い除去効
率を維持していることを示している。On the other hand, in the test using the magnetic separation apparatus of the present invention, the magnetic particle removal time was 60 minutes, and the backwash time was 3 minutes.
When the cleaning water was purified at a processing flow rate of 400 / min, the equilibrium concentration in the system could be suppressed to a very low level of about 70 ppm as shown in the figure. This is because, in the magnetic separation device of the present invention, in addition to the high magnetic particle removal efficiency of the magnetized amorphous alloy thin wire, the filter backwash effect by the combination of the amorphous alloy thin wire and the gas-liquid two-phase flow makes it possible to reduce the size of the filter. This indicates that the high removal efficiency is always maintained without clogging.
【００１６】[0016]
【発明の効果】本発明の磁気分離装置を用いると、様々
な液体中からそこに混入する磁性粒子を高効率でしかも
安定に低コストで除去することが可能となり、その効果
はきわめて大きいものである。The use of the magnetic separation device of the present invention makes it possible to remove magnetic particles mixed in various liquids with high efficiency and stably at low cost, and the effect is extremely large. is there.
【図１】磁性粒子の磁気分離システムを説明する概要説
明図である。FIG. 1 is a schematic explanatory view illustrating a magnetic separation system for magnetic particles.
【図２】（ａ），（ｂ）は本発明の装置構成を示す概要
説明図である。FIGS. 2 (a) and 2 (b) are schematic explanatory diagrams showing a device configuration of the present invention.
【図３】本発明の磁気分離装置において各種逆洗方法に
対する逆洗効果の比較を示す説明図である。FIG. 3 is an explanatory diagram showing a comparison of the backwashing effect with various backwashing methods in the magnetic separation device of the present invention.
【図４】本発明の浄化効果との従来の浄化方法の効果の
比較を示す説明図である。FIG. 4 is an explanatory diagram showing a comparison between the purification effect of the present invention and the effect of a conventional purification method.
１６ 鋼板洗浄工程 １７ 磁気フィルター １８ 循環タンク 16 Steel plate cleaning process 17 Magnetic filter 18 Circulation tank
Claims (1)
アモルファス合金細線から成るフィルターメディアを外
部より磁化させ、ケーシングに流入する浄化対象液体中
の懸濁磁性粒子を吸着除去する磁気分離装置において、
ケーシング外部の着磁装置をケーシングから脱着自在に
設け、かつフィルターメディア中に気体噴射管を設けて
磁気フィルターを洗浄する機能を具備してなる磁気分離
装置。1. A magnetic separation device for magnetizing a filter medium made of a ferromagnetic amorphous alloy thin wire disposed in a non-magnetic casing from the outside and adsorbing and removing suspended magnetic particles in a liquid to be purified flowing into the casing.
A magnetic separation device comprising: a magnetizing device provided outside a casing so as to be detachable from the casing; and a function of washing a magnetic filter by providing a gas injection pipe in a filter medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3046330A JP2968069B2 (en) | 1991-03-12 | 1991-03-12 | Magnetic separation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3046330A JP2968069B2 (en) | 1991-03-12 | 1991-03-12 | Magnetic separation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04281807A JPH04281807A (en) | 1992-10-07 |
| JP2968069B2 true JP2968069B2 (en) | 1999-10-25 |
Family
ID=12744140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3046330A Expired - Lifetime JP2968069B2 (en) | 1991-03-12 | 1991-03-12 | Magnetic separation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2968069B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100967712B1 (en) * | 2003-06-27 | 2010-07-07 | 주식회사 포스코 | Magnetic Filter For Recycling the Roll Milling Oil |
| JP4898182B2 (en) | 2005-10-17 | 2012-03-14 | 株式会社ブンリ | Filtration device |
| JP2010036053A (en) * | 2008-07-31 | 2010-02-18 | Bunri:Kk | Filtering device |
| JP2012176382A (en) | 2011-02-28 | 2012-09-13 | Nippon Steel Engineering Co Ltd | Magnetic separation filter device |
-
1991
- 1991-03-12 JP JP3046330A patent/JP2968069B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04281807A (en) | 1992-10-07 |
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