JPH07299375A - Stirring mill for grinding into fine powder - Google Patents
Stirring mill for grinding into fine powderInfo
- Publication number
- JPH07299375A JPH07299375A JP9501594A JP9501594A JPH07299375A JP H07299375 A JPH07299375 A JP H07299375A JP 9501594 A JP9501594 A JP 9501594A JP 9501594 A JP9501594 A JP 9501594A JP H07299375 A JPH07299375 A JP H07299375A
- Authority
- JP
- Japan
- Prior art keywords
- stirring shaft
- medium
- container
- slurry
- stirring
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
- B02C17/161—Arrangements for separating milling media and ground material
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、粉体の湿式微粉砕又は
顔料等の微粉末をさらに微細に分散するために使用され
る攪拌ミルに関する。特に本発明は、容器と該容器内に
回転自在に配置された攪拌軸との間の粉砕室に粉砕媒体
が充填され、被粉砕物スラリーを粉砕室に軸方向に通し
ながら攪拌軸を回転させて粉砕媒体を攪拌し、被粉砕物
を粉砕又は分散させるようになった形式の攪拌ミルに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet mill of powder or a stirring mill used for finely dispersing fine powder such as pigment. Particularly, in the present invention, the grinding chamber between the container and the stirring shaft rotatably arranged in the container is filled with the grinding medium, and the stirring shaft is rotated while the slurry to be ground is passed through the grinding chamber in the axial direction. The present invention relates to a stirring mill of a type adapted to stir a grinding medium to grind or disperse a material to be ground.
【０００２】[0002]
【従来技術】従来、この用途に使用されている攪拌ミル
は、円筒形の容器内に軸方向に攪拌軸を配置し、該攪拌
軸に攪拌ピンを放射状に取り付けた構造を有する。スラ
リー導入口は容器の軸方向一端部に、スラリー取り出し
口は容器の軸方向他端部に設けられる。容器にガラスビ
ーズ等の粉砕媒体を充填し、スラリー導入口からスラリ
ーを導入しながら攪拌軸により攪拌ピンを回転させ、ス
ラリーを粉砕媒体の間に通すことにより所望の微粉砕及
び微細分散を行う。スラリーは容器の軸方向に流れ、ス
ラリー取り出し口から取り出される。スラリー取り出し
口には、粉砕媒体をスラリーから分離するスクリーン等
の分離手段が設けられる。2. Description of the Related Art Conventionally, a stirring mill used for this purpose has a structure in which a stirring shaft is axially arranged in a cylindrical container and stirring pins are radially attached to the stirring shaft. The slurry inlet is provided at one end of the container in the axial direction, and the slurry outlet is provided at the other end of the container in the axial direction. A container is filled with a crushing medium such as glass beads, and a stirring pin is rotated by a stirring shaft while introducing the slurry from the slurry introduction port, and the slurry is passed between the crushing media to perform desired pulverization and fine dispersion. The slurry flows in the axial direction of the container and is taken out from the slurry take-out port. A separating means such as a screen for separating the grinding medium from the slurry is provided at the slurry outlet.
【０００３】この従来の攪拌ミルにおいては、作動中
に、粉砕媒体が遠心力を受けて半径方向外側に集中する
傾向を生じる。このため、容器の半径方向内側では粉砕
媒体の密度が疎になる空洞部を生じ、スラリーがこの空
洞部を通過するいわゆるバイパス現象を生じて、粉砕な
いしは分散効果を低減させる。また、粉砕室の内部にお
いては、スラリー導入口からスラリー取り出し口に向け
ての流れが生じるため、粉砕媒体が流れの圧力によりス
ラリー取り出し口側に集中する傾向があり、スラリー取
り出し口付近に密集する粉砕媒体中をスラリーが通過す
るために、スラリーの流れ抵抗が増大する。この抵抗
は、特にスラリー流量が増加すると急激に増大する傾向
を有し、粉砕効率の低下を招く。このように、従来の攪
拌ミルでは、粉砕室を有効に利用することができず、か
つ粉砕媒体が圧縮されて磨耗が大きくなる、という問題
がある。さらに、粉砕のための動力は、ほとんどが攪拌
熱として消費されるので、スラリーの温度上昇が大き
く、温度制御が困難になる、という問題もある。In this conventional stirring mill, during operation, the grinding medium tends to be subjected to centrifugal forces and tend to concentrate radially outward. For this reason, a hollow portion in which the density of the grinding medium becomes sparse is formed inside the container in the radial direction, and a so-called bypass phenomenon in which the slurry passes through the hollow portion is generated to reduce the grinding or dispersion effect. Further, in the inside of the pulverization chamber, a flow occurs from the slurry inlet to the slurry outlet, so that the pulverizing medium tends to concentrate on the slurry outlet side due to the pressure of the flow, and concentrates near the slurry outlet. The flow resistance of the slurry increases as it passes through the grinding media. This resistance tends to increase rapidly, especially when the slurry flow rate increases, and causes a reduction in pulverization efficiency. As described above, in the conventional stirring mill, there is a problem that the crushing chamber cannot be effectively used, and the crushing medium is compressed and wear is increased. Further, most of the power for pulverization is consumed as agitation heat, so that there is a problem that the temperature rise of the slurry is large and the temperature control becomes difficult.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、従来の攪拌
ミルにおいて、粉砕媒体が粉砕室の一部に集中する傾向
を有する、という問題及び温度制御が困難である、とい
う問題を解決し、粉砕媒体を粉砕室内で高速で軸方向に
循環させて効率の高い粉砕を可能にする攪拌ミルを提供
することを課題とする。SUMMARY OF THE INVENTION The present invention solves the problems that a grinding medium has a tendency to concentrate in a part of a grinding chamber and that temperature control is difficult in a conventional stirring mill. An object of the present invention is to provide a stirring mill that circulates a grinding medium at high speed in an axial direction in the grinding chamber to enable highly efficient grinding.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するた
め、本発明は、被粉砕物スラリーを循環して粉砕室に通
すことができる粉砕装置を提供する。本発明による攪拌
ミルは、円筒状の容器と、該容器内に同軸かつ回転自在
に配置され周面に攪拌部材を設けた中空の攪拌軸とを備
える。容器には、軸方向一端部に隣接してスラリー入口
が、他端部に隣接してスラリー出口がそれぞれ形成され
る。容器のスラリー出口に隣接する中空の攪拌軸の端部
には、媒体循環用入口が、スラリー入口に隣接する中空
の攪拌軸の端部には媒体循環用出口がそれぞれ形成され
る。スラリー出口を囲んでスクリーンが設けられ、容器
内面と攪拌軸の外面との間に形成される粉砕室に充填さ
れた粉砕媒体が、スラリーの循環圧力により容器の軸方
向に移動し、攪拌軸の媒体循環用入口から攪拌軸内に入
り該攪拌軸の媒体循環用出口から粉砕室内に入る循環径
路により容器内を軸方向に循環する。このとき、スラリ
ーは、循環する媒体の流れに同伴する同伴流となって容
器内を循環し、媒体により粉砕される。本発明の攪拌ミ
ルの特徴は、攪拌軸の媒体循環用出口に近接して、該攪
拌軸の回転に伴い攪拌軸内の媒体を半径方向外向きに加
速するためのポンプ作用を果たすポンプ手段が設けられ
たことにある。このポンプ手段は、攪拌軸の回転に伴っ
て攪拌軸内の媒体が粉砕室に排出される方向に、該攪拌
軸の複数の開口の周方向縁面を傾斜させて構成すること
が好ましい。In order to solve the above-mentioned problems, the present invention provides a crushing apparatus which can circulate a slurry to be crushed and pass it through a crushing chamber. The stirring mill according to the present invention comprises a cylindrical container and a hollow stirring shaft coaxially and rotatably arranged in the container and provided with a stirring member on the peripheral surface. In the container, a slurry inlet is formed adjacent to one axial end and a slurry outlet is formed adjacent the other end. A medium circulation inlet is formed at the end of the hollow stirring shaft adjacent to the slurry outlet of the container, and a medium circulation outlet is formed at the end of the hollow stirring shaft adjacent to the slurry inlet. A screen is provided surrounding the slurry outlet, and the grinding medium filled in the grinding chamber formed between the inner surface of the container and the outer surface of the stirring shaft moves in the axial direction of the container due to the circulation pressure of the slurry, and Circulation is axially circulated in the container through a circulation path that enters the stirring shaft from the medium circulation inlet and enters the grinding chamber from the medium circulation outlet of the stirring shaft. At this time, the slurry becomes an entrained flow accompanying the flow of the circulating medium, circulates in the container, and is pulverized by the medium. A feature of the stirring mill of the present invention is that a pump means that is close to the medium circulation outlet of the stirring shaft and that performs a pumping action for accelerating the medium in the stirring shaft outward in the radial direction with the rotation of the stirring shaft is provided. It has been established. It is preferable that the pump means is configured by inclining circumferential edge surfaces of the plurality of openings of the stirring shaft in a direction in which the medium in the stirring shaft is discharged into the crushing chamber as the stirring shaft rotates.
【０００６】[0006]
【作用】本発明による攪拌ミルにおいては、被粉砕物ス
ラリーは、容器に形成したスラリー入口から粉砕室に導
入される。粉砕室に充填された粉砕媒体はスラリーとと
もに攪拌軸により攪拌され、スラリー中の被粉砕物は粉
砕媒体に同伴されて粉砕室内を軸方向に移動しながら、
互いに摺動を行うように運動する粉砕媒体間で強い摩擦
作用を受け、この摩擦により微細な粒子に粉砕される。
容器出口付近に達した粉砕媒体は、中空攪拌軸の端部に
形成された媒体循環用入口から攪拌軸内に入り、軸方向
に移動して容器入口付近において媒体循環用出口から粉
砕室に戻される。このように、粉砕媒体が攪拌ミル内で
軸方向に循環するために、粉砕媒体が粉砕室の一部に集
中することが防止され、粉砕室の全体を有効に利用した
粉砕作用が達成できる。また、スラリーは、循環する粉
砕媒体に同伴される同伴流となるため、スラリーだけが
媒体の中を通り抜けることがなく、スラリーの流通抵抗
を大幅に低下させることができる。本発明においては、
攪拌軸内の粉砕媒体がポンプ手段により高速で粉砕室に
排出されるため、粉砕室での粉砕媒体の循環も高速で行
われることになり、粉砕効率が極めて高くなる、という
優れた作用が達成される。In the stirring mill according to the present invention, the slurry to be ground is introduced into the grinding chamber through the slurry inlet formed in the container. The pulverizing medium filled in the pulverizing chamber is stirred by the stirring shaft together with the slurry, and the object to be pulverized in the slurry is entrained in the pulverizing medium and moves axially in the pulverizing chamber,
A strong frictional action is exerted between the grinding media that move so as to slide against each other, and this friction causes the particles to be ground into fine particles.
The grinding medium reaching near the container outlet enters the stirring shaft from the medium circulation inlet formed at the end of the hollow stirring shaft, moves axially, and returns from the medium circulation outlet to the grinding chamber near the container inlet. Be done. In this way, since the grinding medium is circulated in the stirring mill in the axial direction, the grinding medium is prevented from concentrating on a part of the grinding chamber, and the grinding action effectively utilizing the entire grinding chamber can be achieved. Further, since the slurry becomes an entrained flow accompanied by the circulating grinding medium, only the slurry does not pass through the medium, and the flow resistance of the slurry can be significantly reduced. In the present invention,
Since the pulverizing medium in the stirring shaft is discharged into the pulverizing chamber at high speed by the pump means, the pulverizing medium is circulated in the pulverizing chamber at high speed, and the excellent effect that the pulverizing efficiency becomes extremely high is achieved. To be done.
【０００７】[0007]
【実施例】以下、本発明の一実施例を図について説明す
る。図１を参照すると、本発明を実施した攪拌ミル１
は、円筒状の容器２を有し、該容器２の周囲には、冷却
用ジャケット３が形成されている。冷却用ジャケット３
には、冷却水入口３ａと冷却水出口３ｂが形成され、該
ジャケット３に冷却水が循環されるように構成される。
容器２は、円筒の両端部が端板２ａ、２ｂにより閉じら
れ、該端板２ａ、２ｂ間にわたって円筒壁２ｃが設けら
れる。容器２内には、攪拌軸４が配置される。この攪拌
軸４は、一端が開口し、他端が閉じたコップ形状であ
り、閉じた方の端部から軸方向外向きに駆動軸５が延び
ている。攪拌軸４は、容器２内において該容器２と同軸
に配置され、駆動軸５が容器２の端壁２ａを貫通して容
器２の外部に突出している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Referring to FIG. 1, a stirring mill 1 embodying the present invention
Has a cylindrical container 2, and a cooling jacket 3 is formed around the container 2. Cooling jacket 3
Is formed with a cooling water inlet 3a and a cooling water outlet 3b, and the cooling water is circulated in the jacket 3.
Both ends of the cylinder of the container 2 are closed by end plates 2a and 2b, and a cylindrical wall 2c is provided between the end plates 2a and 2b. A stirring shaft 4 is arranged in the container 2. The stirring shaft 4 has a cup shape with one end open and the other end closed, and a drive shaft 5 extends axially outward from the closed end. The stirring shaft 4 is arranged coaxially with the container 2 in the container 2, and the drive shaft 5 penetrates the end wall 2 a of the container 2 and projects to the outside of the container 2.
【０００８】容器２には、攪拌軸４の閉じた方の端部に
隣接する端板２ａに被粉砕物スラリー導入用のスラリー
入口６が形成され、反対側の端板２ｂの中央にスラリー
出口７が形成されている。容器２内には、スラリー出口
７を囲んで円筒状のスクリーン８が設けられる。このス
クリーン８は、粉砕媒体の通過を阻止し、スラリーのみ
をスラリー出口７に排出できる構成であり、端部が攪拌
軸４の開口した端部から該攪拌軸４の内部に挿入されて
いる。スクリーン８と攪拌軸４の端部開口との間には粉
砕媒体が流通できるだけの間隙が形成される。この間隙
が媒体循環用入口１２を構成する。攪拌軸４の周壁に
は、該攪拌軸４の閉じた方の端部に隣接する位置に、複
数個の粉砕媒体循環用出口１３が周方向に間隔をもって
形成されている。In the container 2, a slurry inlet 6 for introducing the slurry to be ground is formed in an end plate 2a adjacent to the closed end of the stirring shaft 4, and a slurry outlet is provided in the center of the end plate 2b on the opposite side. 7 are formed. A cylindrical screen 8 is provided in the container 2 so as to surround the slurry outlet 7. The screen 8 is configured to prevent passage of the grinding medium and discharge only the slurry to the slurry outlet 7, and the end portion is inserted into the stirring shaft 4 from the opened end portion of the stirring shaft 4. A gap is formed between the screen 8 and the end opening of the stirring shaft 4 so that the grinding medium can flow therethrough. This gap constitutes the medium circulation inlet 12. On the peripheral wall of the stirring shaft 4, a plurality of grinding medium circulation outlets 13 are formed at intervals in the circumferential direction at positions adjacent to the closed end of the stirring shaft 4.
【０００９】攪拌軸４の外周には、放射状に突出する多
数の攪拌部材４ａが設けられる。攪拌軸４の駆動軸５
は、端板２ａに固定された軸受ハウジング２ｄ内に軸方
向に間隔をもって配置された一対の軸受５ａにより回転
自在に支持されている。攪拌軸４は、駆動軸５に設けた
プーリー９をベルト１０を介してモーターにより駆動す
ることにより回転駆動される。容器２の円筒壁２ｃの内
面と攪拌軸４の外面との間に環状の粉砕室１１が形成さ
れる。この粉砕室１１にはガラスビーズのような粉砕媒
体１５が充填されている。粉砕室１１は、軸方向長さと
内径の比が1.7 より大きくないように寸法を定めること
が好ましい。また、スクリーン８の外径と粉砕室１１の
内径の比は0.3より大きく設定することが好ましい。A large number of radially stirring members 4a are provided on the outer periphery of the stirring shaft 4. Drive shaft 5 of stirring shaft 4
Are rotatably supported by a pair of bearings 5a arranged axially in a bearing housing 2d fixed to the end plate 2a. The stirring shaft 4 is rotationally driven by driving a pulley 9 provided on the drive shaft 5 with a motor via a belt 10. An annular grinding chamber 11 is formed between the inner surface of the cylindrical wall 2c of the container 2 and the outer surface of the stirring shaft 4. The grinding chamber 11 is filled with a grinding medium 15 such as glass beads. The grinding chamber 11 is preferably dimensioned such that the ratio of axial length to inner diameter is not greater than 1.7. Further, the ratio of the outer diameter of the screen 8 to the inner diameter of the crushing chamber 11 is preferably set larger than 0.3.
【００１０】図２及び図３に示すように、攪拌軸４の閉
じた方の端部に隣接する位置で該攪拌軸４の周壁に形成
される複数個の粉砕媒体循環用出口１３は、該攪拌軸４
の周壁の内面から外面に向けて矢印Ａで示す攪拌軸４の
回転方向に対して反対方向になるように、周方向側縁面
が傾斜している。As shown in FIGS. 2 and 3, a plurality of grinding medium circulating outlets 13 formed on the peripheral wall of the stirring shaft 4 at a position adjacent to the closed end of the stirring shaft 4 are Stirring shaft 4
The circumferential side edge surface is inclined so as to be opposite to the rotation direction of the stirring shaft 4 shown by the arrow A from the inner surface to the outer surface of the peripheral wall.
【００１１】この傾斜により、攪拌軸が矢印Ａ方向に回
転したとき、攪拌軸４の内部にある粉砕媒体１５が矢印
Ｂで示すようにこの媒体循環用出口１３から粉砕室１１
に吸い出されるような作用を生じる。この媒体縦貫用出
口１３の縁面の傾斜が、本発明における攪拌軸内の媒体
を半径方向外向きに加速するためのポンプ作用を果たす
ポンプ手段を構成する。Due to this inclination, when the stirring shaft rotates in the direction of arrow A, the grinding medium 15 inside the stirring shaft 4 passes from the medium circulation outlet 13 to the grinding chamber 11 as shown by arrow B.
It causes the action to be sucked into. The inclination of the edge surface of the medium longitudinal exit 13 constitutes pump means for performing a pumping action for accelerating the medium in the stirring shaft outward in the radial direction in the present invention.
【００１２】本発明の図示した実施例の作動を説明す
る。図示しないスラリー給送ポンプを作動させて被粉砕
物スラリーを攪拌ミル１の粉砕室１１に供給しながら攪
拌軸４を回転駆動する。粉砕室１１内の粉砕媒体１５が
攪拌軸４の攪拌部材４ａにより攪拌され、ポンプ作用に
よって軸方向に移動し、被粉砕物スラリーは粉砕媒体に
同伴して流れて、その間に被粉砕物の微粉砕が行われ
る。攪拌ミル１の粉砕室１１を通過した被粉砕物スラリ
ーは、スラリー出口７においてスクリーン８により粉砕
媒体１５から分離されて攪拌ミル１から排出される。The operation of the illustrated embodiment of the invention will now be described. While the slurry feed pump (not shown) is operated to supply the slurry to be ground to the grinding chamber 11 of the stirring mill 1, the stirring shaft 4 is rotationally driven. The pulverizing medium 15 in the pulverizing chamber 11 is agitated by the agitating member 4a of the agitating shaft 4 and moves in the axial direction by the pump action, and the slurry to be pulverized flows along with the pulverizing medium, and in the meantime Crushing is done. The slurry to be ground that has passed through the grinding chamber 11 of the stirring mill 1 is separated from the grinding medium 15 by the screen 8 at the slurry outlet 7 and discharged from the stirring mill 1.
【００１３】攪拌ミル１には被粉砕物スラリーを給送ポ
ンプにより送り込むので、その送り込みの圧力により、
粉砕媒体１５がスラリーとともに出口７側に押しやられ
る傾向を生じる。この出口７側に押しやられた粉砕媒体
１５は、従来の攪拌ミルではスクリーン８のまわりに集
中し、スラリーはその間隙を通ってスクリーン８から出
口７に送り出されることになる。その結果、スクリーン
８のまわりに集中した粉砕媒体は、スラリーの流通に対
する抵抗が増大の原因となる。その傾向は、スラリーの
流量が増加するにつれて顕著になる。図４の線Ａがその
傾向を示す。本発明の実施例では、粉砕媒体１５は媒体
循環用入口１２から攪拌軸４の内部に入る。そして、攪
拌軸４内部の粉砕媒体１５は、循環用出口１３の周方向
側縁面の傾斜により構成されるポンプ手段の作用で、半
径方向外向きに加速され、高速で循環用出口１３からス
ラリー入口側において粉砕室１１に戻される。図１に示
すように、粉砕室１１内における粉砕媒体１５の軸方向
の移動は速度Ｖ1 であり、攪拌軸４内における粉砕媒体
１５の軸方向の移動は速度Ｖ2 である。好ましい実施例
では、速度Ｖ2 は速度Ｖ1 と等しいか、それよりも大き
い。このようにして粉砕媒体１５が粉砕室１１から攪拌
軸４内を経て再び粉砕室に戻る、という循環を行うの
で、粉砕媒体１５が粉砕室１１の出口付近に集中する、
という問題が解消できる。特に本発明においては、攪拌
軸４にポンプ手段が設けられているので、攪拌軸４内の
粉砕媒体が加速されて粉砕室１１に排出される。その結
果、粉砕室１１内で粉砕媒体１５が高速で循環すること
になり、スラリーの流通に対する抵抗は容器と分離器の
管路抵抗だけで、粉砕媒体を通る通路抵抗がなく、全体
としての抵抗が大幅に減少する。図４の線Ｂは本発明の
実施例によるスラリー流量に対する抵抗を圧力損失で示
すもので、これにより、本発明の実施例では、スラリー
の集中による抵抗の増大が防止されることが分かる。The slurry to be crushed is sent to the stirring mill 1 by a feed pump.
The grinding medium 15 tends to be pushed to the outlet 7 side together with the slurry. The grinding medium 15 pushed to the outlet 7 side is concentrated around the screen 8 in the conventional stirring mill, and the slurry is sent from the screen 8 to the outlet 7 through the gap. As a result, the grinding medium concentrated around the screen 8 causes an increase in resistance to the flow of the slurry. The tendency becomes remarkable as the flow rate of the slurry increases. Line A in FIG. 4 shows this tendency. In the embodiment of the present invention, the grinding medium 15 enters the inside of the stirring shaft 4 through the medium circulation inlet 12. Then, the grinding medium 15 inside the stirring shaft 4 is accelerated radially outward by the action of the pump means constituted by the inclination of the peripheral side edge surface of the circulation outlet 13, and the slurry is slurried from the circulation outlet 13 at a high speed. It is returned to the crushing chamber 11 on the inlet side. As shown in FIG. 1, the movement of the grinding medium 15 in the grinding chamber 11 in the axial direction is a speed V 1 , and the movement of the grinding medium 15 in the stirring shaft 4 is a speed V 2 . In the preferred embodiment, velocity V 2 is equal to or greater than velocity V 1 . In this way, the grinding medium 15 is circulated from the grinding chamber 11 back to the grinding chamber through the stirring shaft 4, so that the grinding medium 15 is concentrated near the outlet of the grinding chamber 11.
The problem can be solved. Especially in the present invention, since the stirring shaft 4 is provided with the pump means, the grinding medium in the stirring shaft 4 is accelerated and discharged into the grinding chamber 11. As a result, the grinding medium 15 circulates at a high speed in the grinding chamber 11, and the resistance to the flow of the slurry is only the conduit resistance of the container and the separator, and there is no passage resistance through the grinding media, and the resistance as a whole is reduced. Is greatly reduced. Line B of FIG. 4 shows the resistance to the flow rate of the slurry in terms of pressure loss according to the embodiment of the present invention, which shows that the resistance of the embodiment of the present invention is prevented from increasing due to the concentration of the slurry.
【００１４】なお、先に述べた実施例では、攪拌部材４
ａはピン状のものであったが、これは図５に示すように
円板状の攪拌部材４ｂとすることもできる。In the embodiment described above, the stirring member 4
Although a has a pin shape, it may be a disk-shaped stirring member 4b as shown in FIG.
【００１５】[0015]
【効果】以上述べたように、本発明においては、粉砕室
内の粉砕媒体が攪拌軸の内部を通って高速で循環するよ
うに攪拌ミルを構成したので、粉砕媒体が粉砕室の出口
近傍に集中することがなく、圧力損失が減少し、かつ粉
砕室を有効に使用して粉砕を行うことが可能になる。As described above, in the present invention, since the agitating mill is constructed so that the pulverizing medium in the pulverizing chamber circulates at high speed through the inside of the agitating shaft, the pulverizing medium is concentrated near the outlet of the pulverizing chamber. Pressure loss is reduced, and the crushing chamber can be effectively used to perform crushing.
【図１】本発明の一実施例を示す粉砕装置の概略図であ
る。FIG. 1 is a schematic view of a crushing apparatus showing an embodiment of the present invention.
【図２】図１の線Ｉ−Ｉにおける断面図である。FIG. 2 is a cross-sectional view taken along line I-I of FIG.
【図３】本発明の実施例に使用される攪拌軸の拡大断面
図である。FIG. 3 is an enlarged sectional view of a stirring shaft used in an embodiment of the present invention.
【図４】本発明の実施例における圧損を従来の攪拌ミル
と対比して示す図表である。FIG. 4 is a chart showing pressure loss in an example of the present invention in comparison with a conventional stirring mill.
【図５】本発明の他の実施例を示す攪拌ミルの断面図で
ある。FIG. 5 is a sectional view of a stirring mill showing another embodiment of the present invention.
１・・・・攪拌ミル、２・・・・容器、３・・・・冷却ジャケット、
４・・・・攪拌軸、５・・・・駆動軸、６・・・・スラリー入口、７
・・・・スラリー出口、８・・・・スクリーン、１１・・・・粉砕
室、１２・・・・媒体循環用入口、１３・・・・媒体循環用出口1 ... Stirring mill, 2 ... Container, 3 ... Cooling jacket,
4 ... Stirring shaft, 5 ... Drive shaft, 6 ... Slurry inlet, 7
・ ・ ・ ・ Slurry outlet, 8 ・ ・ ・ ・ Screen, 11 ・ ・ ・ ・ ・ ・ Crushing chamber, 12 ・ ・ ・ ・ Medium circulation inlet, 13 ・ ・ ・ ・ Medium circulation outlet
Claims (3)
つ回転自在に配置され周面に攪拌部材を設けた中空の攪
拌軸とを備え、前記容器には、軸方向一端部に隣接して
スラリー入口が、他端部に隣接してスラリー出口がそれ
ぞれ形成されており、前記容器の前記スラリー出口に隣
接する前記中空の攪拌軸の端部には媒体循環用入口が、
前記スラリー入口に隣接する前記中空の攪拌軸の端部に
は媒体循環用出口がそれぞれ形成され、前記スラリー出
口を囲んでスクリーンが設けられ、前記容器内面と前記
攪拌軸の外面との間に形成される粉砕室に充填された粉
砕媒体は前記スラリーの循環圧力により前記容器の軸方
向に移動し前記攪拌軸の媒体循環用入口から前記攪拌軸
内に入り前記攪拌軸の媒体循環用出口から前記粉砕室内
に入る循環径路により前記容器内で循環するようになっ
た攪拌ミルにおいて、前記攪拌軸には、前記媒体循環用
出口に近接して該攪拌軸の回転に伴い前記攪拌軸内の媒
体を前記容器内での軸方向循環運動させるためのポンプ
作用を果たすポンプ手段が設けて、スラリーを前記媒体
に同伴して流れさせるようにしたことを特徴とする攪拌
ミル。1. A cylindrical container, and a hollow stirring shaft coaxially and rotatably arranged in the container and provided with a stirring member on a peripheral surface thereof. The container is adjacent to one axial end thereof. Slurry inlet, slurry outlet is formed adjacent to the other end, respectively, the medium circulation inlet at the end of the hollow stirring shaft adjacent to the slurry outlet of the container,
A medium circulation outlet is formed at an end of the hollow stirring shaft adjacent to the slurry inlet, and a screen is provided so as to surround the slurry outlet, and is formed between an inner surface of the container and an outer surface of the stirring shaft. The pulverization medium filled in the pulverization chamber is moved in the axial direction of the container by the circulation pressure of the slurry and enters the agitation shaft from the medium circulation inlet of the agitation shaft to the medium circulation outlet of the agitation shaft. In a stirring mill adapted to circulate in the container by a circulation path entering the crushing chamber, the stirring shaft is provided with a medium in the stirring shaft in the vicinity of the medium circulation outlet as the stirring shaft rotates. A stirring mill, characterized in that pump means for performing a circulating action in the container in the axial direction is provided to allow the slurry to flow along with the medium.
て、前記粉砕室内の前記媒体の軸方向速度Ｖ1 と、前記
粉砕室の端部で反転し前記攪拌軸内に入って該攪拌軸内
を流れる前記媒体の軸方向速度Ｖ2 の関係が、速度Ｖ2
が速度Ｖ1 より小さくならないようにしたことを特徴と
する、粉砕装置又は攪拌ミル。2. The stirring mill according to claim 1, wherein the velocity V 1 in the axial direction of the medium in the crushing chamber is reversed at the end of the crushing chamber to enter the stirring shaft to move the inside of the stirring shaft. The relationship of the axial velocity V 2 of the flowing medium is the velocity V 2
Is not less than the velocity V 1 , a grinding device or a stirring mill.
おいて、前記媒体循環用出口は、前記攪拌軸の周面に周
方向に間隔をもって形成した複数の開口により形成さ
れ、前記ポンプ手段は、前記攪拌軸の回転に伴って前記
攪拌軸内の媒体を前記粉砕室に排出するように、前記攪
拌軸の周面に形成した複数の前記開口の周方向縁面を傾
斜させることにより構成されたことを特徴とする、攪拌
ミル。3. The stirring mill according to claim 1, wherein the medium circulation outlet is formed by a plurality of openings formed in the circumferential surface of the stirring shaft at intervals in the circumferential direction, and the pump means is It is configured by inclining circumferential edge surfaces of the plurality of openings formed on the peripheral surface of the stirring shaft so that the medium in the stirring shaft is discharged to the crushing chamber as the stirring shaft rotates. A stirring mill, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9501594A JP3400087B2 (en) | 1994-05-09 | 1994-05-09 | Stirring mill for fine powder grinding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9501594A JP3400087B2 (en) | 1994-05-09 | 1994-05-09 | Stirring mill for fine powder grinding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07299375A true JPH07299375A (en) | 1995-11-14 |
| JP3400087B2 JP3400087B2 (en) | 2003-04-28 |
Family
ID=14126179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9501594A Expired - Fee Related JP3400087B2 (en) | 1994-05-09 | 1994-05-09 | Stirring mill for fine powder grinding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3400087B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100321859B1 (en) * | 1996-07-01 | 2002-08-27 | 미쓰이 고잔 가부시키가이샤 | Crushing apparatus |
| JP2006212488A (en) * | 2005-02-01 | 2006-08-17 | Ashizawa Finetech Ltd | Medium stirring type grinder |
| JP2006212489A (en) * | 2005-02-01 | 2006-08-17 | Ashizawa Finetech Ltd | Grinding method using medium stirring type grinder |
| JP2006239577A (en) * | 2005-03-03 | 2006-09-14 | Mitsui Mining Co Ltd | Media-stirring type wet pulverizer |
| JP2006346667A (en) * | 2005-05-17 | 2006-12-28 | Ashizawa Finetech Ltd | Circulation type media agitating mill |
| JP2007083241A (en) * | 2006-12-28 | 2007-04-05 | Ashizawa Finetech Ltd | Medium agitation type crushing device |
| JP2007229686A (en) * | 2006-03-03 | 2007-09-13 | Mitsui Mining Co Ltd | Media agitation type wet disperser and fine particle dispersion method |
| JP2007289828A (en) * | 2006-04-24 | 2007-11-08 | Mitsui Mining Co Ltd | Medium stirring-type wet dispersion machine and fine particle dispersion method |
| JP2007307522A (en) * | 2006-05-22 | 2007-11-29 | Mitsui Mining Co Ltd | Medium agitation type wet dispersion machine and dispersion method of fine particle |
| JP2008029902A (en) * | 2006-07-26 | 2008-02-14 | Ashizawa Finetech Ltd | Media agitation mill |
| CN106552694A (en) * | 2016-11-22 | 2017-04-05 | 郑州游爱网络技术有限公司 | A kind of granulation screening integration apparatus for carbon molecular sieve raw material |
| CN108686781A (en) * | 2018-06-08 | 2018-10-23 | 东北大学 | A kind of spiral agitator suitable for low-density abrasive media |
-
1994
- 1994-05-09 JP JP9501594A patent/JP3400087B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100321859B1 (en) * | 1996-07-01 | 2002-08-27 | 미쓰이 고잔 가부시키가이샤 | Crushing apparatus |
| JP2006212488A (en) * | 2005-02-01 | 2006-08-17 | Ashizawa Finetech Ltd | Medium stirring type grinder |
| JP2006212489A (en) * | 2005-02-01 | 2006-08-17 | Ashizawa Finetech Ltd | Grinding method using medium stirring type grinder |
| CN100448546C (en) * | 2005-03-03 | 2009-01-07 | 三井矿山株式会社 | Medium mixing up of wet-type dispersion machine |
| JP2006239577A (en) * | 2005-03-03 | 2006-09-14 | Mitsui Mining Co Ltd | Media-stirring type wet pulverizer |
| JP2006346667A (en) * | 2005-05-17 | 2006-12-28 | Ashizawa Finetech Ltd | Circulation type media agitating mill |
| JP4741931B2 (en) * | 2005-05-17 | 2011-08-10 | アシザワ・ファインテック株式会社 | Circulation type media stirring mill |
| JP2007229686A (en) * | 2006-03-03 | 2007-09-13 | Mitsui Mining Co Ltd | Media agitation type wet disperser and fine particle dispersion method |
| JP2007289828A (en) * | 2006-04-24 | 2007-11-08 | Mitsui Mining Co Ltd | Medium stirring-type wet dispersion machine and fine particle dispersion method |
| JP2007307522A (en) * | 2006-05-22 | 2007-11-29 | Mitsui Mining Co Ltd | Medium agitation type wet dispersion machine and dispersion method of fine particle |
| JP2008029902A (en) * | 2006-07-26 | 2008-02-14 | Ashizawa Finetech Ltd | Media agitation mill |
| JP2007083241A (en) * | 2006-12-28 | 2007-04-05 | Ashizawa Finetech Ltd | Medium agitation type crushing device |
| CN106552694A (en) * | 2016-11-22 | 2017-04-05 | 郑州游爱网络技术有限公司 | A kind of granulation screening integration apparatus for carbon molecular sieve raw material |
| CN108686781A (en) * | 2018-06-08 | 2018-10-23 | 东北大学 | A kind of spiral agitator suitable for low-density abrasive media |
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