JPS6084158A - Tower type classifier - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は、乾式の格式粉砕機（タワーミル）の改良に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a dry type crusher (tower mill).

乾式の格式粉砕機は、例えば、特公昭３９−５５８４号
「乾式塔式摩砕粉砕様−１にも開示された公知の粉砕機
である。この粉砕機は第１図、第２図に示すように、閉
鎖内系１内の中心にＩｈｌ＋かあり、この軸にスクリュ
ー３が取すイ目Ｊられでおり、ギャードモータ４により
スクリｊ−３を内容物を持ちあげる向きに回転させる。The dry type crusher is, for example, a known crusher disclosed in Japanese Patent Publication No. 39-5584 "Dry tower type grinding method-1". This crusher is shown in Figs. 1 and 2. As shown, Ihl+ is located at the center of the closed internal system 1, and the screw 3 is attached to this shaft, and the geared motor 4 rotates the screw 3 in the direction to lift up the contents.

給鉱はロータリーバルブ５によって粉砕機内に定１Ｂ供
給する。A constant 1B of ore is supplied into the crusher by a rotary valve 5.

給鉱物同士で粉砕を行わせることもあるか、通畠鋼球な
どの粉砕媒体を粉砕機内に充填しておく。Sometimes the feed minerals are used to crush each other, or the crusher is filled with a crushing medium such as Tokuhata steel balls.

給鉱された被粉砕物は、粉砕媒体とともに、スクリュー
３によって持ち上げられ、壁に沿っ−Ｃ落トし、この間
、粉砕媒体と被粉砕物とのすり合わせによる庁砕作用に
より粉砕される。以トこの粉砕された産物を粉末という
。The fed material to be crushed is lifted up by the screw 3 together with the grinding medium and falls along the wall, during which time it is pulverized by the grinding action of the grinding medium and the material to be crushed. This pulverized product is hereinafter referred to as powder.

粉末は粉砕機りｌに排出されるが、ｆｉＳ　１図の粉砕
機においては、送風機６による粉砕機内の−１，ｙ１気
流に同伴されて−Ｌ方から排出され、ザイクロン２で捕
集される。気流は送風機６から１１ｆび粉砕機に至り循
環する。第２図の粉砕機にあっては、粉末は粉砕機下部
からスリブ）・（図＞ｌ：　Ｌ　−ＣＩＡ：い）を経て
送風機６かもの気流に抽かれて粉砕機外に刊出されバグ
フィルタ７で捕集される。Powder is discharged to the crusher L, but in the crusher shown in fiS 1, it is accompanied by the -1,y1 airflow inside the crusher caused by the blower 6 and is discharged from the -L direction, where it is collected by the Zyclone 2. . The airflow circulates from the blower 6 to the crusher 11f. In the pulverizer shown in Fig. 2, the powder passes from the bottom of the pulverizer through the sleeves) (Fig. > l: L-CIA), is extracted by the airflow of six blowers, and is released outside the pulverizer. It is collected by filter 7.

以」−の従来の格式粉砕機では、被粉砕物の給鉱供給計
が一定であっても排出爪が一定せず、被粉砕物が粉砕媒
体の隙間に充填する充填量、充填密度等により粉砕機内
の通風抵抗が大きく変動し、Ｄ１出量にむらがある等の
欠点があった。In the conventional type crusher, even if the feed meter of the material to be crushed is constant, the discharge claw is not constant, and the amount of the material to be crushed filled into the gap between the crushing media, the packing density, etc. There were drawbacks such as the ventilation resistance inside the crusher fluctuating greatly and the amount of D1 output being uneven.

このため本発明者らは先に格式粉砕機の閉鎖内絡の底面
を粉末を通過させる多孔板で仕切り、この多孔板の下方
に粉末の滞留室を設けることを提案した（特願昭５８−
４５６７８）。この提案に係る粉砕機は、粉末の排出が
どんな場合でも良好となるため、粉末の抜き出し量を任
意に変更でき、従って粉砕機内の被粉砕物のレベルも適
宜制御可能となり、最良の粉砕効率の維持が容易となっ
た。For this reason, the present inventors previously proposed partitioning the bottom of the closed inner wall of a formal crusher with a perforated plate that allows the powder to pass through, and providing a powder retention chamber below this perforated plate (Japanese Patent Application No. 1983-
45678). The proposed pulverizer can discharge the powder well in any case, so the amount of powder to be extracted can be changed arbitrarily, and the level of the material to be crushed in the pulverizer can also be controlled appropriately, achieving the best pulverization efficiency. Maintenance has become easier.

しかしながら多孔板下部の粉末滞留室が、運転中は粉末
によって充満された状態にあることが必須条件になって
おり、この結果滞留室内の粉末の下降状態が直ちに多孔
板の孔を通して上部の粉砕室内の粉体の動きと粉砕媒体
の動きに影響を与え滞留室内の粉末の連動か粉砕効率を
左右することが判明した。However, it is an essential condition that the powder retention chamber at the bottom of the perforated plate is filled with powder during operation, and as a result, the falling state of powder in the retention chamber immediately passes through the holes in the perforated plate to the upper grinding chamber. It was found that the movement of the powder and the movement of the grinding media are influenced by the interlocking of the powder in the retention chamber and the grinding efficiency.

本発明はこのような格式粉砕機の改良に関するものであ
り、下部粉末滞留室内に充満する粉末を滞留室の水平方
向全断面に亘って極力均一にド降させるよう、抜き出す
ことにある。本発明者らは種々検討の上実験を繰返し、
如何なる形の粉体抜き出し装置であれ、複数個の粉末抜
き出し装置を粉砕機の下部粉末滞留室の鉛直中心軸に関
し対称的に配置することにより粉砕効、＝ｔｉをさらに
良好な状態で維持することを０ｆ能とした。この際の複
数個の粉末抜き出し装置については、形状、仕様か同一
であり、それぞれの装置に関わる粉体の流れ方も同一に
なるよう粉体のガイド等の形状を同一ないしは対称的に
することが必要であった。The present invention relates to an improvement of such a type crusher, and the object thereof is to extract the powder filling the lower powder retention chamber so as to drop it as uniformly as possible over the entire horizontal cross section of the retention chamber. The inventors have repeatedly conducted experiments after various studies.
Regardless of the shape of the powder extraction device, by arranging a plurality of powder extraction devices symmetrically with respect to the vertical center axis of the lower powder retention chamber of the crusher, the crushing efficiency, =ti, can be maintained in a better condition. was set to 0f function. In this case, the multiple powder extraction devices should have the same shape and specifications, and the shapes of the powder guides, etc. should be the same or symmetrical so that the flow of powder related to each device is the same. was necessary.

以下図面に基づいて本発明を説明する。The present invention will be explained below based on the drawings.

第３図（ａ）、（ｂ）、（ｃ）は多孔板８を具備し粉末
を同格下部から抜き出す１個のスクリューコンベヤ抜き
出し装置１０をもつ粉砕機の同格下部滞留室９における
粉末の動きを示す概念図であり　（ａ）は縦断面図、（
ｂ）はこれと直交する縦断面図、（ｃ）は断面平面図で
ある。図中の矢印は粉末の移動する方向を示す。理論的
には滞留室９内の粉末は場所により偏った動きをするこ
とが予想されてはいたが、粉末の粒度分布等から判断し
、粉末の下降速度は場所によって非常に大きな差異があ
り、（ｂ）図に示すように滞留室内の矢印の部分の移動
量をＰ、Ｑ、Ｒとすれば移動量Ｒは非常に少なく、Ｒ＜
Ｑ＜Ｐの関係にあり、また平面図（Ｃ）で見れば点線で
囲ったＸの範囲の粉末の下降速度は大きく、反対側（ス
クリューコンベヤ１．０の出口側Ｙの範囲）のＦ降速度
は非常に小さいことが判明した。また一方では粉末は多
孔板の孔を通して多孔板の上下部分が直接つながってい
る関係から滞留室内の粉末の運動は上部の粉砕室内の被
粉砕物の下降にも直接影響を及ぼし、滞留室内の不均一
な粉末の下降は多孔板の上面付近における粉砕効率に直
接悪影響を与える。FIGS. 3(a), (b), and (c) show the movement of powder in the lower retention chamber 9 of a crusher equipped with a perforated plate 8 and one screw conveyor extraction device 10 for extracting powder from the lower equivalent. (a) is a longitudinal cross-sectional view;
b) is a vertical cross-sectional view perpendicular to this, and (c) is a cross-sectional plan view. The arrow in the figure indicates the direction in which the powder moves. Theoretically, it was predicted that the powder in the retention chamber 9 would move unevenly depending on the location, but judging from the particle size distribution of the powder, the descending speed of the powder varies greatly depending on the location. (b) As shown in the figure, if the movement amounts of the arrowed parts in the retention chamber are P, Q, and R, the movement amount R is very small, and R<
There is a relationship of Q<P, and in the plan view (C), the descending speed of the powder in the range The speed turned out to be very small. On the other hand, since the upper and lower parts of the perforated plate are directly connected to each other through the holes in the perforated plate, the movement of the powder in the retention chamber has a direct effect on the descent of the material to be crushed in the upper grinding chamber. The uniform descent of the powder directly affects the grinding efficiency near the top surface of the perforated plate.

そこで、これらの問題解決のために本発明者らは滞留室
９からの粉末抜き出し方法を改めることにした。、第４
図は本発明の実施例で（ａ）は縦断面図、（ｂ）はこれ
に直交する縦断面図、（０）は断面平面図である。粉末
抜き出し川として、ＩＲ留室９に同一仕様のスクリュー
コンベヤ１０を２基、抜き出し方向を逆向きに滞留室の
鉛直中心に対して対称的に平行に配置した。運転の結果
、・滞留室９内の粉末の下降は均一化しくｂ）図におい
てはＰ：Ｑ：Ｒとなり、また（ｅ）図に示ず１ｌｉ−面
画には、Ｘ部とＹ部にほとんど差がなく全断面に亘って
均一な粉末の下降状態であることが分った。Therefore, in order to solve these problems, the present inventors decided to modify the method for extracting powder from the retention chamber 9. , 4th
The figures show an embodiment of the present invention, in which (a) is a longitudinal cross-sectional view, (b) is a vertical cross-sectional view orthogonal to this, and (0) is a cross-sectional plan view. As a powder extraction river, two screw conveyors 10 having the same specifications were arranged in the IR retention chamber 9 symmetrically and parallel to the vertical center of the retention chamber with the extraction direction opposite to each other. As a result of operation, the descent of the powder in the retention chamber 9 becomes uniform, b) In the figure, P:Q:R, and (e) Not shown in the figure, in the 1li plane, there are It was found that the powder was falling uniformly over the entire cross section with almost no difference.

複数基の粉末抜き出し装置とし−Ｃ別の実施例を第５図
、第６図に１シ面的に示す。第５図は１シ（のスクリュ
ーコンベヤ１０で滞留室９の鉛直中心に対称にスクリュ
ーを逆向きに取りつけ、粉末をＷｔ）留室９中心から反
対方向に２方向に抜き出す装置を配設した粉砕機、第６
図は滞留室９から複数ケ所粉末抜き出しダク）１１を設
けこのダクｌ−１１に抜き出し装Ｒ１Ｏをそれぞれ配設
した粉砕機である。また滞留室９そのものを対称的に等
分割し、それぞれ均等に粉末の抜き出し可能の装置を取
り伺けてもよいことはもちろんである。Another embodiment of the invention, which includes a plurality of powder extraction devices, is schematically shown in FIGS. 5 and 6. Figure 5 shows a pulverization system in which a screw conveyor 10 is installed with screws symmetrically oriented in opposite directions to the vertical center of the retention chamber 9, and a device is installed to extract the powder in two directions in opposite directions from the center of the retention chamber 9. machine, 6th
The figure shows a pulverizer in which a plurality of powder extraction ducts 11 are provided from the retention chamber 9, and each of the ducts 1-11 is provided with an extraction device R1O. It goes without saying that the retention chamber 9 itself may be symmetrically divided into equal parts and a device capable of equally extracting the powder from each part may be provided.

本発明の粉砕機は、底板に多孔板を用いこの多孔板の下
方に粉末滞留室を設け、この滞留室に、鉛直中心に関し
て対称な粉末抜き出し装置を設けたので多孔板上の粉砕
媒体および被粉砕物の動きが均一となり、粉砕能力の上
昇的５％の結果を得たほか、使用した粉砕媒体（鋼球）
の摩損量も約３％節約され、真に少なからざる効果を示
した。In the crusher of the present invention, a perforated plate is used as the bottom plate, a powder retention chamber is provided below the perforated plate, and a powder extraction device that is symmetrical with respect to the vertical center is provided in this retention chamber. The movement of the crushed material became uniform, resulting in an increase in crushing capacity of 5%, and the crushing media used (steel balls)
The amount of wear and tear was also reduced by about 3%, demonstrating a truly significant effect.

【図面の簡単な説明】[Brief explanation of drawings]

第１図、第２図は乾式格式粉砕機の説明図、第３図は底
部に多孔板を設けた粉砕機の説明図であり（ａ）は縦断
面図、（ｂ）は（ａ）と直交する縦断面図、（Ｃ）は下
部滞留室平面図を示し、それぞれ図中の矢印は粉体の移
動方向を示す。イエ４図は本発明の実施例を示し、（ａ
）は縦断面図、（ｂ）は（ａ）と直交する縦断面図、（
ｃ）は下部滞留室平面図、第５図、第６図はそれぞれ本
発明の別の実施例の下部滞留室平面図である。 １・・・閉鎖同格　２・・・リーイクロン３・・・スク
リュー　４・・・キャードモータ５・・・ロータリーバ
ルブ　６・・・送風機７・・・バグフィルタ　８・・・
多孔板９・・・滞ＷＪ　室ｉ　ｏ・・・スクリューコン
ベヤ１１・・・ダク）　Ｐ、Ｑ、ｒト・・移動量出願人
　三菱鉱業セメント株式会社 代理人　弁理士　小杉佳男 第１図 第２図 第３図 （Ｑ） （ｂ） （Ｃ） 第４図 （ＣＩ） （ｂ） 図 図 閣信号 ）−・Figures 1 and 2 are explanatory diagrams of a dry grade crusher, and Figure 3 is an explanatory diagram of a crusher with a perforated plate at the bottom. The orthogonal longitudinal sectional view and (C) show a plan view of the lower retention chamber, and the arrows in each figure indicate the moving direction of the powder. Figure 4 shows an embodiment of the present invention, (a
) is a longitudinal sectional view, (b) is a longitudinal sectional view orthogonal to (a), (
c) is a plan view of the lower retention chamber, and FIGS. 5 and 6 are plan views of the lower retention chamber of other embodiments of the present invention, respectively. 1... Closed apposition 2... Leekron 3... Screw 4... Card motor 5... Rotary valve 6... Blower 7... Bag filter 8...
Perforated plate 9...Storage WJ chamber i o...Screw conveyor 11...dak) P, Q, rt...Movement amount Applicant Mitsubishi Mining Cement Co., Ltd. Agent Patent attorney Yoshio Kosugi Figure 1 Figure 2 Figure 3 (Q) (b) (C) Figure 4 (CI) (b) Zuzukaku signal) -・

Claims (1)

【特許請求の範囲】 １　閉鎖同格とその中心にスクリューを設け、閉鎖同格
の底面を被粉砕物を通過させる多孔板とし、この多孔板
の下方に被粉砕物の滞留室を設けた格式粉砕機において
、該滞留室に同一能力の複数基の粉末抜き出し装置を滞
留室の鉛直中心に対して対称に配置したことを特徴とす
る格式粉砕機。 ２　滞留室下部を平面的に複数個に等分割し、それぞれ
の分割部に同−容置の粉末抜き出し装置を配設した特許
請求の範囲第１項記載の格式粉砕機。[Scope of Claims] 1. A scale crusher comprising a closed apposition and a screw at its center, the bottom of the closed apposition being a perforated plate through which the material to be crushed passes, and a retention chamber for the material to be crushed below the perforated plate. A formal crusher characterized in that a plurality of powder extraction devices having the same capacity are arranged in the retention chamber symmetrically with respect to the vertical center of the retention chamber. 2. A formal crusher according to claim 1, wherein the lower part of the retention chamber is divided into a plurality of equal parts in a plane, and each divided part is provided with a powder extraction device having the same capacity.