JP2867009B2 - Powder processing equipment - Google Patents
Powder processing equipmentInfo
- Publication number
- JP2867009B2 JP2867009B2 JP30431694A JP30431694A JP2867009B2 JP 2867009 B2 JP2867009 B2 JP 2867009B2 JP 30431694 A JP30431694 A JP 30431694A JP 30431694 A JP30431694 A JP 30431694A JP 2867009 B2 JP2867009 B2 JP 2867009B2
- Authority
- JP
- Japan
- Prior art keywords
- processing apparatus
- powder processing
- slit
- cylindrical housing
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Crushing And Grinding (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、粉体処理装置に係り、
超微粉砕、粉体の複合化、粉体の改質、粉体の混合、粉
体の形状制御等を行うことによって、粉体に各種の機能
を賦与し、新素材を精製するために使用する粉体処理装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder processing apparatus,
Used to refine powder by giving various functions to powder by performing ultra-fine grinding, compounding powder, modifying powder, mixing powder, controlling powder shape, etc. To a powder processing apparatus.
【０００２】[0002]
【従来の技術】従来の粉体処理技術においては、乾式及
び湿式の粉砕媒体を使用する粉体処理装置によっても、
超微粉の製造と粉体の複合化、改質、混合、形状制御等
の操作は、エネルギー消費量が過多であり、生産量が少
なく、製造コストが高くて、工業的規模の生産には適し
ておらず、僅かに実験室規模で生産されるのみであっ
た。この問題を解決するために、特開平５−２５３５０
９号において開示された流通式媒体撹拌超微粉砕機等に
おいては、撹拌羽根の先端と円筒ハウジングの内壁との
間隔、及び最下段の撹拌羽根１８、２０の下端縁部とス
リット部材１６との間隔を、粉砕媒体の直径の２／３な
いし０となるようにした。この場合、攪拌羽根の先端と
円筒ハウジングの内壁との間隔を粉砕媒体の直径で割っ
た値、すなわち後述する無次元クリアランス数は０．６
７ないし０である。また、最下段の撹拌羽根の下端縁部
とスリット部材との間隔を粉砕媒体の直径で割った値、
すなわち後述する無次元クリアランス数も０．６７ない
し０である。しかし、この流通式媒体撹拌超微粉砕機お
いては、長時間の使用において粉砕媒体の摩耗および割
れが生じ、長時間連続運転ができず、仮に摩耗片および
破片が処理物中に混入すると、処理物の品質を悪化させ
るという問題が生じる。2. Description of the Related Art In the conventional powder processing technology, a powder processing apparatus using dry and wet grinding media is also required.
Production of ultrafine powder and operations such as compounding, reforming, mixing, and shape control of the powder require excessive energy consumption, low production volume, high production cost, and are suitable for industrial-scale production. And was produced only slightly on a laboratory scale. In order to solve this problem, Japanese Patent Application Laid-Open No.
In the flow-type medium stirring ultra-fine pulverizer disclosed in No. 9 and the like, the distance between the tip of the stirring blade and the inner wall of the cylindrical housing, and the lower edge of the lowermost stirring blades 18 and 20 and the slit member 16 The spacing was between 2/3 and 0 of the diameter of the grinding media. In this case, the value obtained by dividing the distance between the tip of the stirring blade and the inner wall of the cylindrical housing by the diameter of the grinding medium, that is, the dimensionless clearance number described later is 0.6.
7 to 0. Further, a value obtained by dividing the distance between the lower edge of the lowermost stirring blade and the slit member by the diameter of the grinding medium,
That is, the dimensionless clearance number described later is also 0.67 to 0. However, in this flow-type medium stirring ultra-fine pulverizer, abrasion and cracking of the pulverization medium occur during long-term use, and continuous operation cannot be performed for a long time. There is a problem that the quality of the processed material is deteriorated.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、従来の粉体
処理装置の上述した問題点に鑑みてなされたものであっ
て、粉砕媒体の摩耗及び割れが少なく、長時間連続運転
が可能であり、またスリット部材や粉砕媒体の摩耗片や
破片が処理物中に混入することがなく、効率的にかつ均
一に粉砕処理が可能な粉体処理装置を提供することを目
的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional powder processing apparatus, and has little wear and cracks in the pulverizing medium and can be operated continuously for a long time. It is another object of the present invention to provide a powder processing apparatus capable of efficiently and uniformly performing a pulverization process without causing abrasion fragments and debris of a slit member and a pulverization medium to be mixed into a processed material.
【０００４】[0004]
【発明の構成】本願の第１発明は、軸線を垂直にして配
置された円筒ハウジングと、粉砕媒体が通過しない大き
さのスリットを設け該円筒ハウジングの底部に配置され
たスリット部材と、該円筒ハウジングの軸線上に配置さ
れた回転軸と、該回転軸に取り付けられた撹拌羽根とを
有する粉体処理装置において、上記撹拌羽根の先端と円
筒ハウジングの内壁との間隔をｗh 、粉砕媒体の直径を
Ｄb とするとき、 ２≦ｗh ／Ｄb ≦１６ とすることを特徴とする粉体処理装置である。第１発明
の実施態様は、上記撹拌羽根が、複数段設けられている
ことを特徴とする。他の実施態様は、上記撹拌羽根が、
垂直な羽根と粉砕媒体を掻き上げる方向に傾斜した傾斜
羽根とを垂直方向に交互に配置してなることを特徴とす
る。本願の第２発明は、軸線を垂直にして配置された円
筒ハウジングと、粉砕媒体が通過しない大きさのスリッ
トを設け該円筒ハウジングの底部に配置されたスリット
部材と、該円筒ハウジングの軸線上に配置された回転軸
と、該回転軸に複数段をなして取り付けられた撹拌羽根
とを有する粉体処理装置において、最下段の上記撹拌羽
根の下端縁部と上記スリット部材の上面との間隔を
ｗb 、粉砕媒体の直径をＤb とするとき、 １．５≦ｗb ／Ｄb ≦８ とすることを特徴とする粉体処理装置である。According to a first aspect of the present invention, there is provided a cylindrical housing having a vertical axis, a slit member provided with a slit having a size through which a pulverizing medium does not pass, and a slit member disposed at the bottom of the cylindrical housing; In a powder processing apparatus having a rotating shaft disposed on the axis of the housing and a stirring blade attached to the rotating shaft, the distance between the tip of the stirring blade and the inner wall of the cylindrical housing is set to w h , A powder processing apparatus characterized in that when the diameter is Db, 2 ≦ w h / Db ≦ 16. An embodiment of the first invention is characterized in that the stirring blade is provided in a plurality of stages. In another embodiment, the stirring blade is
It is characterized in that vertical blades and inclined blades inclined in a direction in which the grinding medium is scraped up are alternately arranged in the vertical direction. A second invention of the present application is directed to a cylindrical housing arranged vertically with an axis thereof, a slit member provided with a slit having a size through which a pulverizing medium does not pass, and a slit member arranged at the bottom of the cylindrical housing. In the powder processing apparatus having the rotating shaft disposed and the stirring blades attached to the rotating shaft in a plurality of stages, the gap between the lower edge of the lowermost stage of the stirring blade and the upper surface of the slit member is reduced. when w b, the diameter of the grinding media and Db, a powder treating apparatus characterized by a 1.5 ≦ w b / Db ≦ 8 .
【０００５】第１発明の実施態様は、上記撹拌羽根が、
複数段設けられていることを特徴とする。他の実施態様
は、上記スリット部材が、スリットを平面円板に設け、
該スリットの放射方向の幅が上記粉砕媒体が通過しない
寸法であり、円周方向の幅が上記放射方向の幅より大き
いことを特徴とする。他の実施態様は、上記撹拌羽根
が、垂直な羽根と粉砕媒体を掻き上げる方向に傾斜した
傾斜羽根とを垂直方向に交互に配置してなることを特徴
とする。[0005] An embodiment of the first invention is characterized in that the stirring blade is
It is characterized in that a plurality of stages are provided. In another embodiment, the slit member is provided with a slit in a flat disk,
The width of the slit in the radial direction is a dimension through which the grinding medium does not pass, and the width in the circumferential direction is larger than the width in the radial direction. Another embodiment is characterized in that the stirring blades are arranged such that vertical blades and inclined blades inclined in a direction in which the grinding medium is scraped up are alternately arranged in the vertical direction.
【０００６】[0006]
【発明の効果】本発明の粉体処理装置によれば、粉砕媒
体の摩耗及び割れが少なく、長時間連続運転が可能であ
り、またスリット部材や粉砕媒体の摩耗片や破片が処理
物中に混入することがなく、効率的にかつ均一に粉砕処
理が可能である効果を有する。According to the powder processing apparatus of the present invention, the abrasion and cracking of the pulverizing medium are small, continuous operation is possible for a long time, and the abraded pieces and debris of the slit member and the pulverizing medium are contained in the processed material. There is an effect that the pulverization can be performed efficiently and uniformly without being mixed.
【０００７】[0007]
【実施例】以下、本発明の実施例の粉体処理装置を図に
基づいて説明する。 〔装置の構成〕粉体処理装置１は、図１に示すように、
軸線を垂直にして配置された円筒ハウジング２の軸線位
置に回転軸４が設けられる。円筒ハウジング２の側壁は
二重構造であって、冷却用液体６または加熱用液体が入
口管８から供給され、壁間を循環し、出口管１０から排
出される。円筒ハウジング２の上部は、処理原料Ｍを供
給するための供給口１２を有する蓋部材１４によって蓋
されている。円筒ハウジング２の底部には、粉砕媒体２
１が通過しない大きさのスリットを設けたスリット部材
１６が取り付けられている。円筒ハウジング２内の回転
軸４には、複数の垂直撹拌羽根１８、傾斜撹拌羽根２０
が各々５段ずつ取り付けられている。垂直撹拌羽根１８
は、円筒ハウジング２の軸線と平行すなわち垂直に取り
付けられ、傾斜撹拌羽根２０は該軸線に対し傾斜して取
付けられている。上から第１段および第３段等の奇数段
目の撹拌羽根は、等間隔に放射方向に複数本例えば５本
の垂直撹拌羽根１８が取付けられ、また第２段および第
４段等の偶数段目の撹拌羽根は、等間隔に放射方向に複
数本例えば５本の傾斜撹拌羽根２０が取付けられてい
る。傾斜撹拌羽根２０の傾斜方向は、回転軸４の駆動回
転によって傾斜撹拌羽根２０が処理原料Ｍを掻き上げる
方向である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A powder processing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. [Structure of Apparatus] As shown in FIG.
The rotating shaft 4 is provided at the axis position of the cylindrical housing 2 arranged with the axis vertical. The side wall of the cylindrical housing 2 has a double structure, and the cooling liquid 6 or the heating liquid is supplied from the inlet pipe 8, circulates between the walls, and is discharged from the outlet pipe 10. The upper part of the cylindrical housing 2 is covered by a cover member 14 having a supply port 12 for supplying the processing raw material M. At the bottom of the cylindrical housing 2, a grinding medium 2
A slit member 16 provided with a slit having a size that does not allow passage of the slit 1 is attached. The rotating shaft 4 in the cylindrical housing 2 has a plurality of vertical stirring blades 18, inclined stirring blades 20.
Are mounted on each of the five stages. Vertical stirring blade 18
Are mounted parallel or perpendicular to the axis of the cylindrical housing 2, and the inclined stirring blades 20 are mounted obliquely with respect to the axis. A plurality of, for example, five vertical stirring blades 18 are radially mounted at equal intervals on the odd-numbered stirring blades such as the first and third stages from the top, and the even-numbered stirring blades such as the second and fourth stages are arranged at equal intervals. A plurality of, for example, five inclined stirring blades 20 are attached at equal intervals in the radial direction to the stirring blades at the stage. The inclination direction of the inclined stirring blade 20 is a direction in which the inclined stirring blade 20 lifts up the processing raw material M by the drive rotation of the rotating shaft 4.
【０００８】複数の垂直撹拌羽根１８、傾斜撹拌羽根２
０は、互いに入替えられて、すなわち、上から第１段お
よび第３段等の奇数段目の撹拌羽根が、等間隔に放射方
向に複数本例えば５本の傾斜撹拌羽根２０が取付けら
れ、また第２段および第４段等の偶数段目の撹拌羽根
は、等間隔に放射方向に複数本例えば５本の垂直撹拌羽
根１８が取付けられるように構成してもよい。撹拌羽根
１８、２０の先端と円筒ハウジング２の内壁との間隔
は、粉砕媒体２１がここに詰まることを防ぐため、室温
において粉砕媒体２１の直径の２倍ないし１６倍とす
る。最下段の撹拌羽根１８または２０の下端縁部とその
下端縁部がスリット部材１６の上面に対し室温において
粉砕媒体２１の直径の１．５倍ないし８倍の間隔を置く
ように定められる。すなわち、撹拌羽根１８または２０
の先端と円筒ハウジング２の内壁との間隔ｗh mm、及び
最下段の撹拌羽根１８、２０の下端縁部とスリット部材
１６の上面との間隔をｗb mm、粉砕媒体の直径をＤbmm
とするとき、ｗh ／Ｄb 及びｗb ／Ｄb を無次元クリア
ランス数と定義すると、無次元クリアランス数ｗh ／Ｄ
b は２ないし１６、ｗb ／Ｄb は１．５ないし８とす
る。 後述する〔成果１〕によっても明らかなように、
無次元クリアランス数ｗ／Ｄb をこの範囲よりも小さく
すると、粉体処理装置１を長時間作動させた時、撹拌羽
根１８、２０の先端と円筒ハウジング２の内壁との間、
及び最下段の撹拌羽根１８、２０の下端縁部とスリット
部材１６との間に粉砕媒体２１を噛み込む頻度が高くな
り、逆に、無次元クリアランス数ｗh ／Ｄb 及びｗb ／
Ｄbをこの範囲よりも小さくすると粉砕効率が著しく低
下する問題がある。A plurality of vertical stirring blades 18 and inclined stirring blades 2
0 are interchanged with each other, that is, odd-numbered stirring blades such as the first and third stages from the top are mounted with a plurality of, for example, five inclined stirring blades 20 at equal intervals in the radial direction. The stirring blades of the even-numbered stages such as the second stage and the fourth stage may be configured such that a plurality of, for example, five vertical stirring blades 18 are attached at equal intervals in the radial direction. The distance between the tips of the stirring blades 18 and 20 and the inner wall of the cylindrical housing 2 is set to 2 to 16 times the diameter of the pulverizing medium 21 at room temperature in order to prevent the pulverizing medium 21 from being clogged here. The lower edge of the lowermost stirring blade 18 or 20 and the lower edge thereof are determined so as to be spaced from the upper surface of the slit member 16 by 1.5 to 8 times the diameter of the pulverizing medium 21 at room temperature. That is, the stirring blade 18 or 20
Interval w h mm, and the distance between the upper surface of the lower end edge portions and the slit member 16 of the lowermost stirring blades 18, 20 w b mm of the tip and the inner wall of the cylindrical housing 2, DBMM the diameter of the grinding media
Where w h / Db and w b / Db are defined as the dimensionless clearance number, the dimensionless clearance number w h / D
b is 2 to 16, w b / Db is 8 to 1.5 to. As is clear from [Result 1] described later,
When the dimensionless clearance number w / Db is smaller than this range, when the powder processing apparatus 1 is operated for a long time, the distance between the tip of the stirring blades 18 and 20 and the inner wall of the cylindrical housing 2 is reduced.
Also, the frequency of biting the grinding medium 21 between the lower end edges of the lowermost stirring blades 18 and 20 and the slit member 16 increases, and conversely, the dimensionless clearance numbers w h / Db and w b /
If Db is smaller than this range, there is a problem that the pulverizing efficiency is significantly reduced.
【０００９】スリット部材１６の下方には、砕成物シュ
ート２４が取付けられている。粉砕処理産物すなわち砕
成物３２はこの砕成物シュート２４を通じて装置外に排
出される。スリット部材１６は、図２に示すように、厚
さ８mmのステンレススチール製円板に螺旋状スリット５
０を設けてなる。スリット５０は、スリット部材１６の
中心寄りの始点５２から、円周寄りの終点５４まで、回
転軸４の回転方向と同一方向へ進む螺旋状をなす。スリ
ット５０の断面は、図３に示す形状であり、上側スリッ
ト幅Ｗｔ（mm）、下側スリット幅Ｗl （mm）の値を下表
に示す。スリット部材１６を補強するため、その裏面に
十字状のステンレススチール製補強材６０を溶接する。
スリット５０の始点５２及び終点５４は、補強材６０上
にあることが強度の点で好ましい。スリット部材１６
は、裏面からウオータジェットでスリット加工し、その
後に補強材６０を溶接する。ウオータジェットは、圧力
が数百ないし数千kgf/cm2 の細い水噴流（ウオータージ
ェット）を所定角度で加工表面に向けて噴射し、その衝
撃によって加工物を開孔及び切断する工作機械である。A crushed material chute 24 is mounted below the slit member 16. The crushed product, that is, the crushed material 32 is discharged out of the apparatus through the crushed material chute 24. As shown in FIG. 2, the slit member 16 is formed on a stainless steel disk having a thickness of 8 mm.
0 is provided. The slit 50 has a spiral shape that advances in the same direction as the rotation direction of the rotating shaft 4 from a starting point 52 near the center of the slit member 16 to an end point 54 near the circumference. The cross section of the slit 50 has the shape shown in FIG. 3, and the values of the upper slit width Wt (mm) and the lower slit width Wl (mm) are shown in the table below. In order to reinforce the slit member 16, a cross-shaped stainless steel reinforcing member 60 is welded to the back surface thereof.
The starting point 52 and the ending point 54 of the slit 50 are preferably on the reinforcing member 60 in terms of strength. Slit member 16
Is formed by slitting with a water jet from the back surface, and then the reinforcing member 60 is welded. A water jet is a machine tool that jets a thin water jet (water jet) having a pressure of several hundred to several thousand kgf / cm 2 toward a processing surface at a predetermined angle, and opens and cuts a workpiece by an impact. .
【００１０】粉体処理装置１を包含しこれを有効に作動
させる粉体処理システム１００は、図４に示すように、
処理原料Ｍを収容する処理原料容器１０５の底部にロー
タリバルブ１０２を取付け、そこから排出される処理原
料Ｍを計量機能を有するフィーダ１０３で貯留し、定量
供給するように構成される。フィーダ１０３は、上述し
た粉体処理装置１に連結される。粉体処理装置１の砕成
物シュート２４は、第１空気搬送部１０４を介して乾式
強制渦流式空気分級機１０６に接続される。乾式強制渦
流式空気分級機１０６の微粉排出口１０８は、第２空気
搬送部１１０を介してバグフイルター１１２に連結され
る。バグフイルター１１２においては、空気搬送された
砕成物３２中の微粉が採取され、清浄空気がブロア１１
３によって大気に放出される。乾式強制渦流式空気分級
機１０６の粗粉排出口１２０は、第３空気搬送部１２２
を介して処理原料容器１０５に連結される。粉体処理装
置１の構成データは次のとうりである。 (1)円筒ハウジング２の寸法 内径： ２００mm 内側深さ： ７７０mm (2)スリット５０の寸法 上側スリット幅Ｗｔ： ０．５mm 下側スリット幅Ｗl ： １．０mm (3)撹拌羽根１８、２０の寸法 垂直方向の幅（高さ）：垂直撹拌羽根１８・・・４２mm 傾斜撹拌羽根２０・・・３７mm 隣接段の撹拌羽根の中心間隔： ６５mm (4)撹拌羽根１８、２０の回転速度 ７０〜７００ｒｐｍ (5)粉砕媒体 アルミナ小径ボール、直径１mm、２mm、３mm、１０mmの
アルミナ小径ボール アルミナ小径ボールの真比重： ３．６０ 〔作動〕上述した粉体処理装置１は、水道水を冷却用液
体６として入口管８から供給して円筒ハウジング２の壁
間を循環させ、出口管１０から排出させることによっ
て、円筒ハウジング２内の温度制御を行う。一方、粉砕
媒体２１を供給口１２から供給した後、処理原料Ｍを同
じく供給口１２から供給し、回転軸４を連続的に回転さ
せる。処理原料Ｍと粉砕媒体２１は、円筒ハウジング２
内で撹拌されながら、処理原料Ｍは粉砕媒体２１によっ
て粉砕され、砕成物３２だけがスリット部材１６のスリ
ット５０を通過して砕成物シュート２４を通じて装置外
に排出される。必要により、円筒ハウジング２内の温度
を制御するため冷却用液体６の代わりに加熱用液体を使
用する。より効果的に温度制御を行うために、円筒ハウ
ジング２内に冷却ガスまたは加熱ガスを圧入又は吸引す
ることもある。 〔成果１〕上述した粉体処理装置１の一般的特性を調べ
るため、５００回の試験を行った。処理原料Ｍと処理産
物すなわち砕成物の粒度分布測定は、粒度が粗い場合は
乾式フルイを使用し、粒度が細かい場合はレーザ回折式
粒度分布測定装置すなわち株式会社日機装製のマイクロ
トラックＳＲＡまたはＳＰＡを使用した。処理原料Ｍ
は、８号けい砂と石灰石の２種類である。処理原料Ｍの
供給速度は、８号けい砂と石灰石ともに６ｋｇ／ｈであ
る。A powder processing system 100 including a powder processing apparatus 1 and effectively operating the same, as shown in FIG.
A rotary valve 102 is attached to the bottom of a processing raw material container 105 that stores the processing raw material M, and the processing raw material M discharged therefrom is stored in a feeder 103 having a measuring function, and is supplied in a fixed amount. The feeder 103 is connected to the powder processing device 1 described above. The crushed material chute 24 of the powder processing apparatus 1 is connected to a dry forced vortex air classifier 106 via a first air transport unit 104. The fine powder discharge port 108 of the dry forced vortex air classifier 106 is connected to a bag filter 112 via a second air conveying unit 110. In the bag filter 112, fine powder in the pulverized product 32 conveyed by air is collected, and clean air is
3 to the atmosphere. The coarse powder discharge port 120 of the dry forced vortex air classifier 106 is connected to a third air conveying section 122.
To the processing raw material container 105. The configuration data of the powder processing apparatus 1 is as follows. (1) Dimension of cylindrical housing 2 Inner diameter: 200 mm Inner depth: 770 mm (2) Dimension of slit 50 Upper slit width Wt: 0.5 mm Lower slit width Wl: 1.0 mm (3) Dimensions of stirring blades 18 and 20 Vertical width (height): Vertical stirring blade 18 ··· 42 mm Inclined stirring blade 20 ··· 37 mm Center spacing of stirring blades in adjacent stages: 65 mm (4) Rotation speed of stirring blades 18 and 20 70 to 700 rpm ( 5) Pulverizing medium Small diameter alumina balls, small diameter balls of 1 mm, 2 mm, 3 mm, 10 mm True specific gravity of small alumina balls: 3.60 [Operation] The powder processing apparatus 1 described above uses tap water as the cooling liquid 6. The temperature inside the cylindrical housing 2 is controlled by supplying from the inlet pipe 8 and circulating between the walls of the cylindrical housing 2 and discharging from the outlet pipe 10. On the other hand, after supplying the pulverizing medium 21 from the supply port 12, the processing raw material M is also supplied from the supply port 12, and the rotating shaft 4 is continuously rotated. The processing raw material M and the grinding medium 21 are
While being stirred inside, the processing raw material M is pulverized by the pulverizing medium 21, and only the crushed material 32 passes through the slit 50 of the slit member 16 and is discharged out of the apparatus through the crushed material chute 24. If necessary, a heating liquid is used instead of the cooling liquid 6 to control the temperature inside the cylindrical housing 2. In order to perform temperature control more effectively, a cooling gas or a heating gas may be injected or sucked into the cylindrical housing 2 in some cases. [Outcome 1] 500 tests were performed to examine the general characteristics of the powder processing apparatus 1 described above. The particle size distribution of the processing raw material M and the processed product, that is, the crushed product, is measured by using a dry sieve when the particle size is coarse, and by using a laser diffraction type particle size distribution measuring device when the particle size is fine, that is, Microtrack SRA or SPA manufactured by Nikkiso Co., Ltd. It was used. Processing raw material M
Are two types of silica sand and limestone. The feed rate of the processing raw material M is 6 kg / h for both No. 8 silica sand and limestone.
【００１１】横軸に上述した撹拌羽根１８、２０の先端
と円筒ハウジング２の内壁との間の無次元クリアランス
数ｗh ／Ｄb を取り、縦軸に砕成物３２の平均粒子径Ｘ
50及び比粉砕エネルギーＥ（ｋＷｈ／ｋｇ）を取って、
これら上記三者の関係を図５に示す。ここで、比粉砕エ
ネルギーＥ（ｋＷｈ／ｋｇ）は、処理原料Ｍ１ｋｇを所
定の平均粒子径Ｘ50に粉砕するために必要な粉体処理装
置の１時間当たりに消費する動力（ｋＷｈ／ｋｇ）と定
義される。図５から明らかなように、ｗh ／Ｄb ＝１０
付近までは、砕成物の平均径Ｘ50＝１．９５μｍであ
る。ｗh ／Ｄb がこれ以上に大きくなると、砕成物の平
均径Ｘ50も次第に粗くなる。この傾向は比粉砕エネルギ
ーＥについても見られるところで、ｗh ／Ｄb ＝１０付
近まではＥ＝０．９５ｋＷｈ／ｋｇの値を保つ。すなわ
ち、粉砕処理のことのみを考えれば、ｗh ／Ｄb ＝１６
以下が好ましい。また、それほど平均径Ｘ50の値の小さ
な製品を必要としない場合には、言うまでもなく比粉砕
エネルギーＥの値が低い状態で運転を行っても十分に目
的を達する。また、横軸に無次元クリアランス数ｗh ／
Ｄb を取り、縦軸に撹拌羽根回転完全度ε（無次元）を
取って、両者の関係を図６に示す。ここで、撹拌羽根回
転完全度εは、攪拌羽根の先端と円筒ハウジングの内面
との間に粉砕媒体が噛み込み、攪拌羽根がまったく回転
しない場合を０とし、噛み込みがなく円滑に回転する場
合を１．０とする。図６から明らかなように、なお、無
次元クリアランス数ｗh ／Ｄb がおおよそ０．８〜２の
範囲では、粉砕媒体が撹拌羽根先端と円筒ハウジング内
壁との間に噛み込まれて回転が不完全になる場合があ
る。ｗh ／Ｄb が約４以上になると回転も完全になる。
すなわち、粉体処理装置１の作動のみを考慮すれば、ｗ
h ／Ｄb ＝２以上である。無次元クリアランス数ｗh ／
Ｄb ＝４０．３では、撹拌羽根の長さが零である。The horizontal axis represents the dimensionless clearance number w h / Db between the tips of the stirring blades 18 and 20 and the inner wall of the cylindrical housing 2, and the vertical axis represents the average particle diameter X of the crushed material 32.
Taking 50 and the specific grinding energy E (kWh / kg),
FIG. 5 shows the relationship between the three. Here, specific grinding energy E (kWh / kg) is the power (kWh / kg) to be consumed per hour of powder processing apparatus required for grinding process material M1kg a predetermined average particle size X 50 Defined. As is apparent from FIG. 5, w h / Db = 10
Up to the vicinity, the average diameter X 50 of the crushed product is 1.95 μm. If w h / Db becomes larger than this, the average diameter X 50 of the crushed material gradually becomes coarse. This trend where is also seen for specific grinding energy E, to near w h / Db = 10 keeps the value of E = 0.95kWh / kg. That is, considering only that the grinding treatment, w h / Db = 16
The following is preferred. When it is not require much smaller product value of the mean diameter X 50 is of course the value of specific grinding energy E reaches a sufficiently purpose be carried out operating at a low state. In addition, the dimensionless clearance number on the horizontal axis w h /
FIG. 6 shows Db, and the vertical axis represents the completeness of rotation of the stirring blades ε (dimensionless). Here, the stirring blade rotation perfection ε is set to 0 when the grinding medium is caught between the tip of the stirring blade and the inner surface of the cylindrical housing and the stirring blade does not rotate at all, and when the stirring blade rotates smoothly without biting. Is set to 1.0. As apparent from FIG. 6, In the range of dimensionless clearance number w h / Db is approximately 0.8 to 2, the rotation crowded with biting between the milling media stirring blade tip and the cylindrical inside wall of the housing not May be complete. rotation and w h / Db is about 4 or more also is complete.
That is, if only the operation of the powder processing apparatus 1 is considered, w
h / Db = 2 or more. Dimensionless clearance number of w h /
When Db = 40.3, the length of the stirring blade is zero.
【００１２】一方、最下段の攪拌羽根の下端縁部とスリ
ット部材１６上面との無次元クリアランス数ｗb ／Ｄb
については、攪拌羽根の下端縁部とスリット部１６上面
との間の粉砕媒体が、攪拌羽根の回転とともに遠心効果
によって外周方向すなわち円筒ハウジング２の内壁側へ
移動し、従って粉砕媒体は、噛み込まれようとしても円
筒ハウジング２の内壁側へ逃げることができるため、粉
砕媒体が噛み込まれ難い。従って、無次元クリアランス
数ｗb ／Ｄb ＝１．５以上になると円滑に回転するよう
になり、粉砕媒体もスリット部材上を活発に移動し、ス
リット部材の粉砕物による目詰まりを防止する。しか
し、無次元クリアランス数ｗb ／Ｄb が８以上になる
と、スリット部材１６上面の摩擦抵抗及び攪拌羽根の回
転力が粉砕媒体に伝達され難くなり、スリット部材の上
面に接している粉砕媒体が殆ど移動しなくなり、スリッ
トが目詰まりし、作動不能となる。 〔成果２〕８号けい砂を６ｋｇ／ｈで供給・粉砕した時
の砕成物の粒度は次のとおりであった。 平均径Ｘ50 ＝ １．６１μｍ 最大径Ｘ100 ＝１０．５５μｍ 〔成果３〕８号けい砂を超微粉砕後、乾式強制渦流式空
気分級機で分級し超微粉を生産した例として、８号けい
砂の砕成物を図４に示す乾式強制渦流式空気分級機１０
６によって分級した微粉製品の粒度は次のとおりであっ
た。On the other hand, the dimensionless clearance number w b / Db between the lower edge of the lowermost stirring blade and the upper surface of the slit member 16.
With regard to the above, the crushing medium between the lower edge of the stirring blade and the upper surface of the slit portion 16 moves to the outer circumferential direction, that is, the inner wall side of the cylindrical housing 2 due to the centrifugal effect with the rotation of the stirring blade. Even if it is rare, it can escape to the inner wall side of the cylindrical housing 2, so that the pulverizing medium is hardly caught. Therefore, now rotate smoothly becomes dimensionless clearance number w b / Db = 1.5 or higher, the grinding media also actively move on the slit member, preventing clogging due pulverized slit member. However, when the dimensionless clearance number w b / Db is 8 or more, the rotational force of the frictional resistance and the stirring blade of the slit member 16 top surface is hardly transmitted to the grinding media, grinding media in contact with the upper surface of the slit member is almost It will not move, the slit will be clogged, and it will not work. [Outcome 2] The particle size of the crushed product when No. 8 silica sand was supplied and pulverized at 6 kg / h was as follows. Average diameter X 50 = 1.61 μm Maximum diameter X 100 = 10.55 μm [Result 3] As an example of ultra-fine powder produced by ultra-fine pulverization of silica sand and classification by a dry forced vortex type air classifier, ultra-fine powder is produced. A dry forced vortex type air classifier 10 shown in FIG.
The particle size of the fine powder product classified according to No. 6 was as follows.
【００１３】平均径Ｘ50 ＝ ０．６４μｍ 最大径Ｘ100 ＝ ２．６３μｍ この時の処理原料供給量は６ｋｇ／ｈで、微粉製品の生
産量は１．４ｋｇ／ｈであった。 〔成果４〕ＪＳＭ−Ｔ１００（ＪＥＯＬ製）およびＳ−
２５００（日立製作所製）の走査式電子顕微鏡による微
粉砕前後の粒子の電子顕微鏡写真を図７に示す。微粉砕
前の粒子は角ばった形状であるが、本発明の粉体処理装
置により粉砕処理すると、図８に示すように、砕成物は
一般に角のない丸みを帯びた形状になり、このような粒
子形状を希望する粉体の生産に最適である。 〔成果５〕本発明の装置は、粉体の複合化にも有効に適
用できる。 (1) 石灰石と二酸化チタンの複合化例 石灰石を母粒子に、二酸化チタンを子粒子にした場合の
複合化は、 母粒子…石灰石（粒度２μｍ以下）、配合率８０％ 子粒子…二酸化チタン（株式会社テイカの製品、製品
名ＪＡ−１、平均径Ｘ50＝０．２〜０．３μｍ）、配合
率２０％ 複合化の状態…図９に複合化した粒子の走査式電子顕
微鏡の写真を示す。同図から母粒子の石灰石表面に子粒
子の二酸化チタンが均質に付着し、複合化していること
が分る。 (2) ８号けい砂と二酸化チタンの複合化例 ８号けい砂を母粒子に、二酸化チタンを子粒子にした場
合の複合化例は、 母粒子…８号けい砂（平均粒子径Ｘ50＝８３μｍ）、
配合率８０％ 子粒子…二酸化チタン（株式会社テイカの製品、製品
名ＪＡ−１、平均粒子径Ｘ50＝０．２〜０．３μｍ）、
配合率２０％ 複合化の状態…母粒子の８号けい砂表面に子粒子の二
酸化チタンが図９の場合と同様に均質に付着し、複合化
していた。 〔成果６〕本発明の装置は、粉体の改質のためにも有効
に適用できる。カオリン粉を２ｋｇ／ｈで１パス（１回
通し）および２パス（２回通し）処理した時の処理産物
を、理学電気株式会社製のＸ線回折装置ＣＮ４０３７Ａ
１［２ｋＷ用］による回折の結果を図１０に示す。図１
０において、横軸は回折角度２θ〔°〕を示し、縦軸は
Ｘ線強度〔ＣＰＳ〕を示す。図１０に示すように、原料
のＸ線回折線には鋭いピークがあり、整った結晶構造で
あることを示している。一方、処理産物のＸ線回折線の
ピーク値が低くなり、非晶質（アモルファス）化が進行
している。この傾向は１パス（１回通し）より２パス
（２回通し）の処理産物の方が顕著で、パス回数が増加
するほど非晶質（アモルファス）化が進行している。Average diameter X 50 = 0.64 μm Maximum diameter X 100 = 2.63 μm At this time, the supply amount of the processing raw material was 6 kg / h, and the production amount of the fine powder product was 1.4 kg / h. [Outcome 4] JSM-T100 (made by JEOL) and S-
FIG. 7 shows electron micrographs of particles before and after pulverization with a scanning electron microscope 2500 (manufactured by Hitachi, Ltd.). The particles before the fine pulverization have a rounded shape. However, when the particles are pulverized by the powder processing apparatus of the present invention, as shown in FIG. 8, the pulverized product generally has a rounded shape without corners. It is most suitable for the production of powders that require a fine particle shape. [Outcome 5] The apparatus of the present invention can be effectively applied to compounding of powder. (1) Example of compounding of limestone and titanium dioxide When limestone is used as the base particles and titanium dioxide is used as the child particles, the compounding is as follows: mother particles: limestone (particle size: 2 μm or less), blending ratio: 80% child particles: titanium dioxide ( A product of Teika Co., Ltd., product name JA-1, average diameter X 50 = 0.2-0.3 μm), compounding ratio 20%, state of compounding: FIG. 9 shows a photograph of a scanning electron microscope of the compounded particles. Show. From the figure, it can be seen that the titanium dioxide of the child particles is uniformly attached to the surface of the limestone of the parent particles, and is composited. (2) Example of compounding of No. 8 silica sand and titanium dioxide A compounding example of using No. 8 silica sand as a base particle and titanium dioxide as a child particle is as follows: Base particles: No. 8 silica sand (average particle diameter X50 = 83 μm),
Blending 80% subparticles ... titanium dioxide (product of Ltd. Taker, product name EN-1, the average particle diameter X 50 = 0.2 to 0.3 [mu] m),
Compounding ratio: 20% Composite state: The titanium dioxide of the child particles uniformly adhered to the surface of the # 8 silica sand of the base particles as in the case of FIG. [Outcome 6] The apparatus of the present invention can be effectively applied to powder modification. The processed product obtained by processing the kaolin powder at 1 kg (1 pass) and 2 passes (2 passes) at 2 kg / h was converted to an X-ray diffractometer CN4037A manufactured by Rigaku Corporation.
FIG. 10 shows the result of diffraction by 1 [for 2 kW]. FIG.
At 0, the horizontal axis indicates the diffraction angle 2θ [°], and the vertical axis indicates the X-ray intensity [CPS]. As shown in FIG. 10, the X-ray diffraction line of the raw material has a sharp peak, indicating that it has a well-defined crystal structure. On the other hand, the peak value of the X-ray diffraction line of the processed product becomes lower, and the product becomes amorphous. This tendency is more remarkable in the processed product in two passes (two passes) than in one pass (one pass), and the more the number of passes increases, the more amorphization (amorphization) progresses.
【００１４】カオリンの場合非晶質（アモルファス）化
が進行すると溶解性が高くなる、耐候性が良くなるなど
品質が向上する。この現象は非晶質（アモルファス）化
だけに依存するのではなく、処理中生じるメカノケミカ
ル効果も寄与していると考えられる。いずれにしても、
カオリン粉を本発明の粉体処理装置で処理することによ
って、品質が向上するなどの改質することができ、その
改質進行度合をＸ線回折結果で判断している。粉体処理
装置による粉体の改質例はカオリン粉だけに止まらず、
各種粉体を同様に処理し、パス回数は異なるが非晶質
（アモルファス）化が進行する、粉体の反応性が良くな
る、吸着性が向上するなど同様の効果を得ている。[0014] In the case of kaolin, as the amorphous state progresses, the solubility is improved and the weather resistance is improved, and the quality is improved. It is considered that this phenomenon depends not only on the amorphousization but also on the mechanochemical effect generated during the processing. In any case,
By processing the kaolin powder with the powder processing apparatus of the present invention, it is possible to modify the quality, for example, to improve the quality. The degree of the progress of the modification is determined based on the result of X-ray diffraction. Examples of powder modification by powder processing equipment are not limited to kaolin powder,
Various powders are treated in the same manner, and the same effect is obtained, although the number of passes is different, the amorphousization proceeds, the reactivity of the powder is improved, and the adsorptivity is improved.
【図１】本発明の実施例の粉体処理装置の断面図であ
る。FIG. 1 is a sectional view of a powder processing apparatus according to an embodiment of the present invention.
【図２】本発明の実施例のスリット部材の平面図であ
る。FIG. 2 is a plan view of a slit member according to the embodiment of the present invention.
【図３】本発明の実施例のスリット部材の部分断面図で
ある。FIG. 3 is a partial sectional view of a slit member according to the embodiment of the present invention.
【図４】本発明の実施例の粉体処理装置を包含する粉体
処理システムの構成図である。FIG. 4 is a configuration diagram of a powder processing system including a powder processing apparatus according to an embodiment of the present invention.
【図５】本発明の粉体処理装置による粉砕の成果を示す
グラフ図である。FIG. 5 is a graph showing the result of pulverization by the powder processing apparatus of the present invention.
【図６】本発明の粉体処理装置における攪拌羽根回転完
全度を示すグラフ図である。FIG. 6 is a graph showing the completeness of rotation of a stirring blade in the powder processing apparatus of the present invention.
【図７】処理原料の８号けい砂の粒子形状を示す２００
倍の電子顕微鏡写真である。FIG. 7 shows the particle shape of No. 8 silica sand as a processing raw material.
It is an electron micrograph of the magnification.
【図８】本発明の粉体処理装置によって粉砕した８号け
い砂の粒子形状を示す２００００倍の電子顕微鏡写真で
ある。FIG. 8 is a 20,000 × electron micrograph showing the particle shape of No. 8 silica sand pulverized by the powder processing apparatus of the present invention.
【図９】石灰石を母粒子、二酸化チタンを子粒子として
本発明の粉体処理装置によって複合化した砕成物の構造
を示す１００００倍の電子顕微鏡写真である。FIG. 9 is an electron micrograph (× 10000) showing the structure of a crushed product composited with limestone as base particles and titanium dioxide as child particles by the powder processing apparatus of the present invention.
【図１０】カオリン粉を本発明の粉体処理装置によって
改質処理した砕成物のＸ線回折結果を示すグラフ図であ
る。FIG. 10 is a graph showing an X-ray diffraction result of a crushed product obtained by modifying kaolin powder by the powder processing apparatus of the present invention.
Ｍ 処理原料 １ 粉体処理装置 ２ 円筒ハウジング ４ 回転軸 ６ 冷却用液体 ８ 入口管 １０ 出口管 １２ 供給口 １４ 蓋部材 １６ スリット部材 １８ 垂直撹拌羽根 ２０ 傾斜撹拌羽根 ２１ 粉砕媒体 ２４ 砕成物シュート ３２ 砕成物 ５０ 螺旋状スリット ５２ 始点 ５４ 終点 ６０ ステンレススチール製補強材 １００ 粉体処理システム １０６ 乾式強制渦流式空気分級機 M Processing raw material 1 Powder processing device 2 Cylindrical housing 4 Rotating shaft 6 Cooling liquid 8 Inlet pipe 10 Outlet pipe 12 Supply port 14 Lid member 16 Slit member 18 Vertical stirring blade 20 Inclined stirring blade 21 Grinding medium 24 Crushed material chute 32 Granulated material 50 Spiral slit 52 Start 54 End 60 Stainless steel reinforcement 100 Powder treatment system 106 Dry forced vortex air classifier
───────────────────────────────────────────────────── フロントページの続き (72)発明者 阿部 学 東京都港区新橋３丁目４番５号 新橋フ ロンティアビル５階 株式会社 ファイ マテック内 (72)発明者 上田 勝己 東京都港区新橋３丁目４番５号 新橋フ ロンティアビル５階 株式会社 ファイ マテック内 (72)発明者 金子 貫太郎 大阪府大阪市西区北堀江１丁目12番19号 株式会社 栗本鉄工所内 (56)参考文献 特開 昭60−122054（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B02C 17/00 - 17/24──────────────────────────────────────────────────続 き Continuing on the front page (72) The inventor, Manabu Abe 3-4-5, Shimbashi, Minato-ku, Tokyo 5th floor of Shinbashi Frontier Building Pai Matek Co., Ltd. (72) Katsumi Ueda 3-chome, Shimbashi, Minato-ku, Tokyo No. 4-5 Shinbashi Frontier Building 5th floor Pai Matec Co., Ltd. (72) Inventor Kantaro Kantaro 1-12-19 Kitahorie, Nishi-ku, Osaka-shi, Osaka Kurimoto Iron Works Co., Ltd. (56) References 122054 (JP, A) (58) Field surveyed (Int. Cl. 6 , DB name) B02C 17/00-17/24
Claims (7)
ングと、粉砕媒体が通過しない大きさのスリットを設け
該円筒ハウジングの底部に配置されたスリット部材と、
該円筒ハウジングの軸線上に配置された回転軸と、該回
転軸に取り付けられた撹拌羽根とを有する粉体処理装置
において、 上記撹拌羽根の先端と円筒ハウジングの内壁との間隔を
ｗh 、粉砕媒体の直径をＤb とするとき、 ２≦ｗh ／Ｄb ≦１６ とすることを特徴とする粉体処理装置。1. A cylindrical housing arranged with its axis vertical, a slit member provided with a slit having a size through which a pulverizing medium does not pass, and arranged at the bottom of the cylindrical housing,
In a powder processing apparatus having a rotating shaft arranged on the axis of the cylindrical housing and a stirring blade attached to the rotating shaft, the distance between the tip of the stirring blade and the inner wall of the cylindrical housing is set to w h , A powder processing apparatus, wherein when the diameter of the medium is Db, 2 ≦ w h / Db ≦ 16.
ことを特徴とする請求項１記載の粉体処理装置。2. The powder processing apparatus according to claim 1, wherein the stirring blade is provided in a plurality of stages.
を掻き上げる方向に傾斜した傾斜羽根とを垂直方向に交
互に配置してなることを特徴とする請求項２記載の粉体
処理装置。3. The powder processing apparatus according to claim 2, wherein the stirring blades are arranged such that vertical blades and inclined blades inclined in a direction in which the grinding medium is scraped up are alternately arranged in the vertical direction. .
ングと、粉砕媒体が通過しない大きさのスリットを設け
該円筒ハウジングの底部に配置されたスリット部材と、
該円筒ハウジングの軸線上に配置された回転軸と、該回
転軸に複数段をなして取り付けられた撹拌羽根とを有す
る粉体処理装置において、 最下段の上記撹拌羽根の下端縁部と上記スリット部材の
上面との間隔をｗb 、粉砕媒体の直径をＤb とすると
き、 １．５≦ｗb ／Ｄb ≦８ とすることを特徴とする粉体処理装置。4. A cylindrical housing arranged with its axis vertical, a slit member provided with a slit having a size through which a grinding medium does not pass, and arranged at the bottom of the cylindrical housing,
In a powder processing apparatus having a rotating shaft disposed on the axis of the cylindrical housing and stirring blades attached to the rotating shaft in a plurality of stages, a lower end edge of the lowermost stirring blade and the slit when the distance between the upper surface of the member to w b, the diameter of the grinding media and Db, powder processing apparatus characterized by a 1.5 ≦ w b / Db ≦ 8 .
ことを特徴とする請求項４記載の粉体処理装置。5. The powder processing apparatus according to claim 4, wherein a plurality of the stirring blades are provided.
板に設け、該スリットの放射方向の幅が上記粉砕媒体が
通過しない寸法であり、円周方向の幅が上記放射方向の
幅より大きいことを特徴とする請求項４記載の粉体処理
装置。6. The slit member is provided with a slit in a flat disk, the width of the slit in the radial direction is a size that the grinding medium does not pass, and the width in the circumferential direction is larger than the width in the radial direction. The powder processing apparatus according to claim 4, wherein:
を掻き上げる方向に傾斜した傾斜羽根とを垂直方向に交
互に配置してなることを特徴とする請求項５記載の粉体
処理装置。7. A powder processing apparatus according to claim 5, wherein said stirring blades are arranged such that vertical blades and inclined blades inclined in a direction in which a grinding medium is lifted are alternately arranged in a vertical direction. .
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30431694A JP2867009B2 (en) | 1994-11-14 | 1994-11-14 | Powder processing equipment |
| KR1019950041116A KR960016970A (en) | 1994-11-14 | 1995-11-13 | Powder processing apparatus and manufacturing method of slit member used in the apparatus |
| US08/555,838 US5769338A (en) | 1994-11-14 | 1995-11-13 | Pulverulent body processing apparatus and method of manufacturing a slit member to be used for the same |
| EP95117951A EP0711605A3 (en) | 1994-11-14 | 1995-11-14 | Pulverulent body processing apparatus and method of manufacturing a slit member to be used for the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30431694A JP2867009B2 (en) | 1994-11-14 | 1994-11-14 | Powder processing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08131860A JPH08131860A (en) | 1996-05-28 |
| JP2867009B2 true JP2867009B2 (en) | 1999-03-08 |
Family
ID=17931565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30431694A Expired - Fee Related JP2867009B2 (en) | 1994-11-14 | 1994-11-14 | Powder processing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2867009B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012013279A1 (en) | 2012-07-05 | 2014-01-09 | Roland Nied | Method for operating a stirred ball mill and agitator ball mill therefor |
-
1994
- 1994-11-14 JP JP30431694A patent/JP2867009B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08131860A (en) | 1996-05-28 |
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