JP2795363B2 - Crushing equipment - Google Patents

Crushing equipment

Info

Publication number
JP2795363B2
JP2795363B2 JP3333841A JP33384191A JP2795363B2 JP 2795363 B2 JP2795363 B2 JP 2795363B2 JP 3333841 A JP3333841 A JP 3333841A JP 33384191 A JP33384191 A JP 33384191A JP 2795363 B2 JP2795363 B2 JP 2795363B2
Authority
JP
Japan
Prior art keywords
raw
rotary
layer thickness
vertical
mill
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
Application number
JP3333841A
Other languages
Japanese (ja)
Other versions
JPH05104019A (en
Inventor
充 池田
忠之 古閑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ube Corp
Original Assignee
Ube Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ube Industries Ltd filed Critical Ube Industries Ltd
Priority to JP3333841A priority Critical patent/JP2795363B2/en
Publication of JPH05104019A publication Critical patent/JPH05104019A/en
Application granted granted Critical
Publication of JP2795363B2 publication Critical patent/JP2795363B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material
    • B02C21/002Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明の粉砕設備は,ボールミル
などの仕上ミルの予備粉砕機として竪型粉砕機を使用す
るものであって,主としてセメントクリンカ,高炉スラ
グなど特に硬くて粉砕し難く,かつ,摩耗性の強い原料
を微粉砕する粉砕設備に関する。
BACKGROUND OF THE INVENTION The crushing equipment of the present invention uses a vertical crusher as a preliminary crusher for a finishing mill such as a ball mill, and is particularly hard, such as cement clinker and blast furnace slag, which is hard to crush. In addition, the present invention relates to a crushing apparatus for finely crushing a material having high abrasion.

【0002】[0002]

【従来の技術】石灰石や高炉スラグ,セメント原料など
の化学品を細かく粉砕し粉体とする粉砕機の一種とし
て,図6に示すように,回転テーブルと粉砕ローラとを
備えた竪型粉砕機1が広く用いられている。この種の粉
砕機は,円筒状ケーシング15の下部においてモータ2
Aにより減速機2で駆動されて低速回転する円盤状の回
転テーブル3Aと,その上面外周部を円周方向へ等分す
る箇所に油圧などで圧接されて従動回転する複数個の粉
砕ローラ4とを備えている。
2. Description of the Related Art As one type of pulverizer for finely pulverizing chemical products such as limestone, blast furnace slag, and cement raw material into powder, as shown in FIG. 6, a vertical pulverizer equipped with a rotary table and a pulverizing roller. 1 is widely used. This type of crusher has a motor 2 at the lower part of the cylindrical casing 15.
A, a disk-shaped rotary table 3A driven by the speed reducer 2 and rotated at a low speed, and a plurality of crushing rollers 4 driven to rotate by being hydraulically pressed against a portion equally dividing the outer peripheral portion of the upper surface in the circumferential direction. It has.

【0003】粉砕ローラ4はケーシング15に軸6によ
って揺動自在に軸支されたアーム5とアーム7を介して
油圧シリンダ9のピストンロッド10に連結されてお
り,油圧シリンダ9を作動させることにより,粉砕ロー
ラ4を回転テーブル3A上に押圧して原料への粉砕圧力
を与えている。3Bは回転テーブル3Aの外周縁に設け
られ原料層厚を調整するダムリング,14は回転テーブ
ル3A周囲のガス吹上用環状空間通路,14Aはガス供
給路,13は羽根13Aにより粉砕された原料を分級す
る回転セパレータ,16はガスと共に製品を取出す排出
口,17は原料投入シュートである。
The crushing roller 4 is connected to a piston rod 10 of a hydraulic cylinder 9 via an arm 5 and an arm 7 which are pivotally supported on a casing 15 by a shaft 6 so that the crushing roller 4 is actuated. The crushing roller 4 is pressed on the rotary table 3A to apply crushing pressure to the raw material. 3B is a dam ring provided on the outer periphery of the rotary table 3A to adjust the thickness of the raw material layer, 14 is an annular space passage for gas blowing around the rotary table 3A, 14A is a gas supply path, and 13 is a raw material pulverized by the blade 13A. A rotary separator for classification, 16 is an outlet for taking out the product together with the gas, and 17 is a raw material input chute.

【0004】このような竪型粉砕機において,回転テー
ブルの中央部へ原料投入シュート17で供給された原料
は,回転テーブル3Aの回転によりテーブル半径方向の
遠心力を受けて回転テーブル3A上を滑るときに回転テ
ーブル3Aにより回転方向の力を受け,回転テーブル3
Aとの間で滑って回転テーブル3Aの回転数よりいくら
か遅い回転を行なう。以上2つの力,すなわち,半径方
向と回転方向の力とが合成され,原料は回転テーブル3
A上を渦巻状の軌跡を描いて回転テーブル3Aの外周部
へ移動する。この外周部には,ローラが圧接されて回転
しているので,渦巻線を描いた原料は粉砕ローラ4と回
転テーブル3Aとの間へローラ軸方向とある角度をなす
方向から進入して噛込まれて粉砕される。
In such a vertical pulverizer, the raw material supplied to the center of the rotary table by the raw material charging chute 17 receives the centrifugal force in the table radial direction by the rotation of the rotary table 3A and slides on the rotary table 3A. When a force in the rotating direction is received by the rotating table 3A,
A slides with A and makes a rotation somewhat slower than the rotation speed of the turntable 3A. The above two forces, that is, the force in the radial direction and the force in the rotational direction are synthesized, and the raw material is
A moves to the outer periphery of the turntable 3A in a spiral locus on A. Since a roller is pressed against this outer peripheral portion and rotated, the raw material describing the spiral enters the crushing roller 4 and the rotary table 3A from a direction forming an angle with the roller axis direction and is caught. Rarely crushed.

【0005】一方,ケーシング15の基部にはダクトに
よって空気,あるいは熱風などのガスが導かれており,
このガスが回転テーブル3Aの外周面とケーシングの内
周面との間の環状空間部14から吹き上がることによ
り,粉砕された微粉体はガスに同伴されてケーシング1
5内を上昇し,上部に位置するセパレータ13の羽根1
3Aにより分級作用を受け,所定粒度の製品はガスと共
に排出口16から排出され次の工程へ送られる。
On the other hand, a gas such as air or hot air is guided to the base of the casing 15 by a duct.
This gas blows up from the annular space 14 between the outer peripheral surface of the turntable 3A and the inner peripheral surface of the casing, so that the pulverized fine powder accompanies the gas and the casing 1
5, the blades 1 of the separator 13 located above.
The product having the predetermined particle size is subjected to the classification action by 3A, and is discharged together with the gas from the outlet 16 and sent to the next step.

【0006】近年粉砕原料の製品粒度への要求は年々高
まり,微粉砕あるいは超微粉砕と称されるように,益々
製品粒度の微細化が望まれるようになった。そこで単一
の粉砕機でその要求に応じることは困難になり,このた
め,たとえばボールミル等の仕上ミルに原料を投入する
前に予備粉砕機として竪型粉砕機を使用し,竪型粉砕機
の粉砕産物を振動篩でふるい分けして微粉のみを仕上ミ
ルへ供給する方法が採用されるようになった。図5はこ
の場合のフローシートを示し,原料コンベヤ60によっ
て供給された原料ホッパ70の原料はコンスタントフィ
ード・ウェア80を経て,竪型粉砕機1で粉砕され,産
物はバケットエレベータ90を介して振動篩100に導
かれてスクリーニングされ,微粉のみ仕上ミル(ボール
ミル)110で粉砕され,オーバサイズの産物は再び竪
型粉砕機1で予備粉砕されるようになっている。120
は分級装置,130は集塵装置,140は吸引ファンで
ある。
[0006] In recent years, the demand for the product particle size of the pulverized raw material has been increasing year by year, and the finer product particle size has been more and more desired as referred to as fine pulverization or ultra-fine pulverization. Therefore, it is difficult to meet the demand with a single crusher. For this reason, for example, a vertical crusher is used as a preliminary crusher before charging the raw materials into a finishing mill such as a ball mill. A method has been adopted in which a crushed product is sieved with a vibrating sieve and only fine powder is supplied to a finishing mill. FIG. 5 shows a flow sheet in this case. The raw material of the raw material hopper 70 supplied by the raw material conveyor 60 is pulverized by the vertical pulverizer 1 through the constant feedware 80, and the product is vibrated through the bucket elevator 90. It is guided to a sieve 100 for screening, and only fine powder is pulverized by a finishing mill (ball mill) 110, and the oversized product is again pre-pulverized by the vertical pulverizer 1. 120
Is a classifier, 130 is a dust collector, and 140 is a suction fan.

【0007】[0007]

【発明が解決しようとする課題】上に述べた予備粉砕お
よび本粉砕による2段粉砕では,予備粉砕の産物を振動
篩でふるい分けしており,篩のメインテナンスが問題と
なる。すなわち,たとえば,スラグを含有するセメント
クリンカの微粉砕を行なう場合など摩耗性の特に激しい
原料では,一般的に言って2〜3ケ月毎に振動篩の点検
と部品交換が必要となり,この取替え作業には数時間の
運転停止を余儀なくされ,運転休止による生産性の低下
が避けられなかった。したがって振動篩に代る代替手段
の採用が当面する課題であった。
In the above-described two-stage pulverization by pre-pulverization and main pulverization, the pre-pulverized product is sieved with a vibrating sieve, and maintenance of the sieve becomes a problem. That is, for example, when the raw material is particularly abrasive, such as when finely pulverizing a cement clinker containing slag, it is generally necessary to inspect the vibrating sieve and replace parts every two to three months. Had to be shut down for several hours, which inevitably led to a drop in productivity due to downtime. Therefore, there has been a problem to be solved by adopting an alternative means instead of the vibrating sieve.

【0008】また,スラグやクリンカなど硬くて被粉砕
性の悪い原料をかなり細かく粉砕するときには,強い加
圧力を粉砕ローラに加えるので原料層厚は比較的小さ
く,そのため振動が発生しやすく,発生する振動値(振
幅)は通常の原料に比べて大きく,安定した連続運転が
継続し難いという難点があった。
Further, when a hard and poorly crushable raw material such as slag or clinker is crushed to a very small size, a strong pressing force is applied to the crushing roller, so that the thickness of the raw material layer is relatively small, and therefore vibration is liable to occur, which is likely to occur. The vibration value (amplitude) is larger than that of ordinary raw materials, and it is difficult to maintain stable continuous operation.

【0009】[0009]

【課題を解決するための手段】上に述べた課題を解決す
るために、本発明の粉砕設備においては、予備粉砕機と
して使用する竪型粉砕機と、該竪型粉砕機へ原料を供給
する秤量機を備えた原料供給設備と、該竪型粉砕機の粉
砕産物を粉砕する仕上ミルと、粉砕後の微粉を分級する
分級装置と、分級後の精粉を捕集する集塵装置ならびに
吸引ファンとから構成される粉砕設備であって、該竪型
粉砕機は回転テーブルの外周部上面に複数個の回転自在
な粉砕ローラを配置し、該粉砕ローラを該回転テーブル
へ押圧する油圧力可変の油圧手段を備え、粉砕ローラに
所定の粉砕力を与えて回転テーブル上面と粉砕ローラ周
面との間で原料を粉砕する竪型粉砕機てあって、ケーシ
ングに振動計を装着するとともに、運転中における回転
テーブルと粉砕ローラ間の原料層厚を測定する層厚計を
備え、回転テーブル駆動用の電動機を可変速電動機と
し、かつ、前記振動計の指示値前記層厚計の指示値
前記原料供給設備の秤量機の指示値を入力してあらかじ
め設定されたアルゴリズムにより振動レベルの判定
料層厚の判定原料供給量の判定を行なってそれぞれの
設定された適正値を逸脱したとき、前記油圧手段の油圧
力を変更するか、または該可変速電動機の回転数を変更
するか、原料供給量を変更する操作指令信号を発信する
制御装置を備え、前記回転テーブルの外周下部に粉砕産
物の排出口を具備してなる構成とした。
In order to solve the above-mentioned problems, in the crushing equipment of the present invention, a vertical crusher used as a preliminary crusher and a raw material are supplied to the vertical crusher. A raw material supply facility equipped with a weighing machine, a finishing mill for pulverizing the pulverized product of the vertical pulverizer, a classifier for classifying fine powder after pulverization, a dust collector for collecting fine powder after classification, and suction Crushing equipment comprising a fan, wherein the vertical crusher has a plurality of rotatable crushing rollers disposed on an upper surface of an outer peripheral portion of a rotary table, and a variable hydraulic pressure for pressing the crushing rollers against the rotary table. A vertical crusher that applies a predetermined crushing force to the crushing roller and crushes the raw material between the upper surface of the rotary table and the peripheral surface of the crushing roller. Rotating table and crusher With a layer thickness meter which measures a material layer thickness between La, a motor for driving the rotary table and variable speed electric motor, and the instruction value and <br/> the material of the layer thickness meter and indicated value of the vibrometer the appropriate values each set perform the determination of the determination and the raw material supply quantity determination and the original <br/> RyosoAtsu vibration level by weighing machines algorithm preset by entering the indicated value of the supply equipment A control device for transmitting an operation command signal for changing the hydraulic pressure of the hydraulic means, changing the rotation speed of the variable speed motor, or changing the raw material supply amount when deviating; The bottom was provided with a discharge port for crushed products.

【0010】[0010]

【作用】本発明の粉砕設備は,予備粉砕機として採用す
る竪型粉砕機で粉砕された粉砕産物の粗粒を仕上ミルに
供給して粉砕する2段粉砕とし,仕上ミルの粉砕産物お
よび竪型粉砕機の精粉を分級して微粉を製品とする一
方,分級後の粗粉は再び仕上ミルにて粉砕されるから粉
砕効率が高い。また,仕上ミルへ供給する経路では振動
篩を省略しているので運転休止も少なく生産性が向上す
る。さらに,竪型粉砕機の振動発生時には,竪型粉砕機
に装備された振動計と層厚計およびこの測定値と予め設
定された設定値との差異によって,粉砕ローラの油圧力
や回転テーブルの回転数を変更して原料層厚を適正に保
持し,原料供給量をコントロールする制御装置の働きに
より,振動発生の持続を抑制し鎮静化させることができ
るので安定連続運転ができる。
The pulverizing equipment of the present invention is a two-stage pulverizer in which coarse particles of the pulverized product pulverized by a vertical pulverizer adopted as a preliminary pulverizer are supplied to a finishing mill and pulverized. The fine powder obtained by classifying the fine powder of the die grinder is refined, and the coarse powder after classification is again pulverized by the finishing mill, so that the pulverization efficiency is high. In addition, since the vibrating sieve is omitted in the supply path to the finishing mill, the number of operation stoppages is small, and the productivity is improved. In addition, when vibration of the vertical mill is generated, the vibration pressure and the thickness of the rotary table and the rotary table are determined by the difference between the measured value and the preset value. By controlling the material layer thickness appropriately by changing the number of revolutions and controlling the material supply amount, the continuous generation of vibrations can be suppressed and the calming can be suppressed.

【0011】[0011]

【実施例】以下図面に基づいて本発明の実施例について
詳細に説明する。図1〜図4は本発明に係る実施例を示
し,図1は粉砕設備のフローシート,図2制御装置のブ
ロック線図,図3は制御系統図,図4は層厚計の概略説
明用縦断面図である。図において,1は竪型粉砕機,2
Aは可変速電動機,9Aは油圧シリンダ9の油圧ユニッ
ト,60は原料コンベヤ,70は原料ホッパ,80はコ
ンスタントフィード・ウェア,80aは同用可変速電動
機,80bはコンスタントフィード・ウェア80の秤量
機,110は仕上ミル(たとえばボールミルやロッドミ
ル),120は分級装置,130は集塵装置,140は
吸引ファンである。竪型粉砕機1のケーシング15には
振動計200が装着され,また,粉砕ローラ4のアーム
5には,図4に示すように,層厚計210が装備され
る。220は制御装置であり,振動計200と層厚計2
10および可変速電動機2Aとコンスタントフィード・
ウェア80の可変速電動機80aとに接続される。仕上
ミル110は通常ボールミルやロッドミルを使用し,分
級装置(たとえば,サイクロンセパレータが採用され
る)120を閉回路に連結して分級後の粗粉は仕上ミル
110の入口側へ再度供給される。微粉はバッグフィル
タやサイクロン,電気集塵機などの集塵装置130で捕
集し,製品となる。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 show an embodiment according to the present invention. FIG. 1 is a flow sheet of a crusher, FIG. 2 is a block diagram of a control device, FIG. 3 is a control system diagram, and FIG. It is a longitudinal cross-sectional view. In the figure, 1 is a vertical crusher, 2
A is a variable speed motor, 9A is a hydraulic unit of the hydraulic cylinder 9, 60 is a raw material conveyor, 70 is a raw material hopper, 80 is a constant feed wear, 80a is a variable speed electric motor for the same use, and 80b is a weighing machine of the constant feed wear 80 , 110 is a finishing mill (for example, a ball mill or a rod mill), 120 is a classifier, 130 is a dust collector, and 140 is a suction fan. A vibrometer 200 is mounted on the casing 15 of the vertical crusher 1, and a layer thickness meter 210 is mounted on the arm 5 of the crush roller 4 as shown in FIG. Reference numeral 220 denotes a control device, which is a vibration meter 200 and a layer thickness meter 2.
10 and variable speed motor 2A and constant feed
The wear 80 is connected to the variable speed motor 80a. The finishing mill 110 is usually a ball mill or a rod mill, and a classifier (for example, a cyclone separator is used) 120 is connected to a closed circuit, and the classified coarse powder is supplied again to the inlet of the finishing mill 110. The fine powder is collected by a dust collector 130 such as a bag filter, a cyclone, and an electric dust collector, and becomes a product.

【0012】次に竪型粉砕機1の構造のうち,特に層厚
計210および制御装置220について図2〜図4に基
づいて説明する。まず,層厚計210について説明する
と,図4に示すように,運転中刻々変動する原料層厚の
変化に対応して上下動する粉砕ローラ4の動きを回転軸
6回りに回動するアーム5の動きとして把握し,その変
位は変位変換器として,たとえば,差動変圧器を応用し
た層厚計130で測定する。すなわち,図に示すように
1次コイルEと2次コイルA,Bとの間に磁性体で作ら
れたコアCを入れ,1次コイルAに一定の交流電圧E
を励磁しておき,アーム5とロッドRを介して連結して
前後進させると,コアCの移動によって2次コイルAと
2次コイルBに対するリアクタンスが変化し,両者の誘
起電圧EとEに差を生じて出力電位差Eが得ら
れ,これよりコアCの変位が測定できる。なお,竪型粉
砕機1のその他の構造は従来技術で説明したとおりであ
るからその説明は省略する。
Next, among the structures of the vertical pulverizer 1, the layer thickness meter 210 and the control device 220 will be described with reference to FIGS. First, the layer thickness meter 210 will be described. As shown in FIG. 4, the movement of the pulverizing roller 4 which moves up and down in response to the change of the raw material layer thickness that fluctuates during operation is controlled by the arm 5 which rotates about the rotation axis 6. The displacement is measured by a layer thickness gauge 130 to which a differential transformer is applied, for example, as a displacement converter. That is, the primary coil E as shown in FIG. And the secondary coil A, put core C made of magnetic material between is B, a constant AC voltage to the primary coil A E P
Leave excited, when the backward before linked via an arm 5 and rod R, the reactance is changed by the movement of the core C against the secondary coil A and the secondary coil B, both the induced voltage E A and E A difference is generated in B , and an output potential difference E O is obtained, from which the displacement of the core C can be measured. The other structure of the vertical crusher 1 is the same as that described in the related art, so that the description is omitted.

【0013】次に,制御装置220の作動について説明
する。図2に示すように,タイマで設定された時間間隔
毎に刻々測定される振動計200および層厚計210な
らびに秤量機80bの測定結果が電気信号に変換されて
制御装置220へ入力される。この3つの情報(振動値
と原料層厚と原料供給量)と予め設定器に入力されてい
る設定値とを比較器で比較し,設定値の範囲を逸脱して
いる場合には制御器を介して粉砕ローラ4に負荷する油
圧力を変更して振動値と原料層厚の改善を図り,次いで
可変速電動機2Aの回転数を制御して回転テーブル3A
の回転数を増減する。設定値には基準振動レベル,基準
原料層厚ならびに定格回転数(回転テーブル駆動用可変
速電動機),定格回転数(コンスタントフィード・ウェ
ア駆動用可変速電動機)を入れておく。制御器は調節器
と操作器とから構成され,調節器は振動値や原料層厚の
測定値と設定値との差異に応じて回転テーブル駆動用可
変速電動機の回転数の増減の幅を指示するもので,その
制御動作には比例動作(P動作),積分動作(I動
作),微分動作(D動作),比例積分動作(PI動
作),比例微分動作(PD動作)等,原料水分の変化の
状況に応じて使い分けることができる。調節器は,以上
のほか,振動の設定値に対する測定値の越え方に応じて
原料供給量を減少させる幅を指示する役割も有する。な
お,原料供給量はコンスタントフィード・ウェア80の
秤量機80bの測定値を時間単位に積算することにより
得られる。
Next, the operation of the control device 220 will be described. As shown in FIG. 2, the measurement results of the vibrometer 200, the layer thickness meter 210, and the weighing machine 80b, which are measured every time interval set by the timer, are converted into electric signals and input to the control device 220. The three pieces of information (vibration value, raw material layer thickness, and raw material supply amount) are compared with set values input to the setter in advance by a comparator. The hydraulic pressure applied to the crushing roller 4 is changed to improve the vibration value and the thickness of the raw material layer.
Increase or decrease the number of rotations. The set values include the reference vibration level, the reference material layer thickness, the rated rotation speed (variable speed motor for driving the rotary table), and the rated rotation speed (variable speed motor for driving the constant feed wear). The controller is composed of a controller and an operating device. The controller indicates the range of increase or decrease of the rotation speed of the variable speed motor for driving the rotary table according to the difference between the set value and the measured value of the vibration value or material layer thickness. The control operation includes proportional operation (P operation), integration operation (I operation), differentiation operation (D operation), proportional integration operation (PI operation), and proportional differentiation operation (PD operation). It can be used properly according to the situation of change. In addition to the above, the controller also has a role of indicating a width of decreasing the raw material supply amount in accordance with how the measured value exceeds the set value of the vibration. The raw material supply amount is obtained by integrating the measured values of the weighing machine 80b of the constant feed ware 80 in units of time.

【0014】操作器はこの調節器からの指示に基づいて
油圧ユニット9Aまたは可変速電動機2Aや可変速電動
機80aへ動作指令を伝達する。図中の矢印のついた線
は信号の流れを示す。
The operating device transmits an operation command to the hydraulic unit 9A or the variable speed motor 2A or the variable speed motor 80a based on an instruction from the controller. The line with the arrow in the figure indicates the signal flow.

【0015】これらの制御装置220の制御系統の流れ
は,図3に示すとおりである。すなわち,運転中タイマ
によって指示された時間間隔で,振動値と原料層厚が測
定され,振動実測値が基準振動レベル(たとえば片振幅
50μm)より大きいときには,原料層厚が設定範囲よ
り低いとき油圧力や回転テーブル回転数を減少し,設定
範囲より高いときには油圧力や回転テーブル回転数を増
加させる。原料層厚が適正範囲にあるにも拘らず振動レ
ベルが高いときにはこの事態を回避するため一時的に原
料供給量を減少させるが,原料供給量を減少させたこと
による原料層厚の減少分だけ回転テーブル回転数を絞っ
て従来どおりの原料層厚を保持する。また,振動レベル
が基準レベル以内で原料供給量が定格に満たないときに
は原料供給量を増加するが,このときも原料層厚が変動
しないようそれに見合う分だけ回転テーブル回転数を増
加する。
The flow of the control system of these control devices 220 is as shown in FIG. That is, the vibration value and the thickness of the raw material layer are measured at the time intervals specified by the timer during operation, and when the measured vibration value is larger than the reference vibration level (for example, half-amplitude 50 μm), when the raw material layer thickness is lower than the set range, The pressure and the rotation speed of the rotary table are reduced, and when the pressure is higher than the set range, the hydraulic pressure and the rotation speed of the rotary table are increased. When the vibration level is high even though the raw material layer thickness is in the appropriate range, the supply of raw material is temporarily reduced to avoid this situation. The conventional raw material layer thickness is maintained by reducing the number of rotations of the turntable. Further, when the vibration supply level is within the reference level and the raw material supply amount is less than the rated value, the raw material supply amount is increased. At this time, too, the rotation table rotation speed is increased by an amount corresponding thereto so that the raw material layer thickness does not fluctuate.

【0016】このようにして,動作変更したあとタイマ
による一定時間経過後,再び振動値や層厚計210によ
る原料層厚測定値と設定値とを比較し,設定値を越えた
ときには上に述べた操作を繰返す。振動値の設定値は片
振幅50μm程度とし,原料層厚の設定値は原料の種類
や粉砕機の型番,製品粒度によって異なり一概に決めら
れないが,軟い原料や型番の大きな粉砕機,製品粒度の
粗いときほど設定層厚は大きくなる。運転実績やテスト
ランによって状況を把握し適正な値を選定するとよい。
In this way, after a certain period of time elapses by the timer after the operation is changed, the vibration value or the raw material layer thickness measured value by the layer thickness meter 210 is compared with the set value again. Repeat the operation. The set value of the vibration value is about 50 μm in half amplitude, and the set value of the raw material layer thickness depends on the type of raw material, the model of the crusher, and the particle size of the product, and cannot be determined unconditionally. The set layer thickness increases as the grain size increases. It is advisable to grasp the situation based on operation results and test runs and select an appropriate value.

【0017】以上のようなフィードバック機構を有する
自動制御を実施することにより,振動値が急に増大した
り,運転中に供給原料の含有水分が急に低下(または増
大)して粉砕効率が低下したり,噛込みが悪くなって振
動値が増大した状態になっても,上記の操作によって原
料供給量や原料層厚が改善され,原料の噛込みが再び良
くなってもとの安定した運転状態にもどすことができ
る。
By performing the automatic control having the feedback mechanism as described above, the vibration value suddenly increases, or the water content of the feed material suddenly decreases (or increases) during operation, and the grinding efficiency decreases. Even if the vibration value increases due to poor biting, the raw material supply amount and the raw material layer thickness are improved by the above operation, and the raw material biting is improved again to maintain the stable operation. You can return to the state.

【0018】本発明の粉砕設備は,このような竪型粉砕
機1が予備粉砕を実施し,微粉は分級後空気搬送によっ
て分級装置120へ搬送され,粗粒は仕上ミル110に
供給されて粉砕され,閉回路に仕上ミル110に接続さ
れた分級装置(サイクロンセパレータ)120で仕上粉
砕後の所望粒度の微粉を集塵機130で捕集する。した
がって,竪型粉砕機と仕上ミルとの間にはたとえば振動
篩のような分級装置が不要であり,プラント全体の構成
がシンプルであるので設備費,ランニングコストとも低
い。特に摩耗性のつよい原料では摩耗部品の取替えで度
々運転休止することが回避される。
In the pulverizing equipment of the present invention, such a vertical pulverizer 1 carries out preliminary pulverization, and after classification, fine powder is conveyed to a classification device 120 by air conveyance, and coarse particles are supplied to a finishing mill 110 for pulverization. Then, fine particles having a desired particle size after the finish pulverization are collected by a dust collector 130 by a classifier (cyclone separator) 120 connected to the finishing mill 110 in a closed circuit. Therefore, there is no need for a classifier such as a vibrating sieve between the vertical mill and the finishing mill, and the configuration of the entire plant is simple, so that both equipment costs and running costs are low. Frequent shutdowns due to replacement of worn parts are avoided, especially with raw materials that are highly abrasive.

【0019】[0019]

【発明の効果】本発明の粉砕設備は以上説明したように
構成されているので,下記のとおりの効果を奏する。 予備粉砕機としての竪型粉砕機の粉砕産物のうち微
粉は仕上ミルを経由しないので,仕上ミルでの過粉砕を
防止できるほか粉砕効率が向上する。 竪型粉砕機の振動発生時に自動的に粉砕ローラの油
圧力や回転テーブル回転数を変更して原料層厚を適正範
囲に保持して振動発生を鎮静化するので粉砕設備を長期
連続安定的に運転できる。 従来技術のように振動篩を使用しないので,摩耗部
品の取替え間隔が大きく,連続運転期間が長くなり生産
性が向上し,メインテナンス性が改善される。 予備粉砕と仕上粉砕との間に分級設備がなく設備費
が安価である。
Since the crushing equipment of the present invention is constructed as described above, the following effects can be obtained. Since fine powder among the pulverized products of the vertical pulverizer as the pre-pulverizer does not pass through the finishing mill, over-pulverization in the finishing mill can be prevented and the pulverizing efficiency is improved. Automatically changes the oil pressure of the crushing roller and the number of revolutions of the rotary table when the vibration of the vertical crusher is generated. Can drive. Since a vibrating sieve is not used unlike the prior art, the interval between replacement of worn parts is large, the continuous operation period is long, productivity is improved, and maintainability is improved. There is no classification equipment between pre-milling and finishing milling, and the equipment cost is low.

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

【図1】本発明の粉砕設備の実施例を示すフローシート
である。
FIG. 1 is a flow sheet showing an embodiment of the crushing equipment of the present invention.

【図2】本発明の粉砕設備に係る竪型粉砕機の制御装置
の実施例を示すブロック線図である。
FIG. 2 is a block diagram showing an embodiment of a control device of a vertical crusher according to the crushing equipment of the present invention.

【図3】本発明の粉砕設備に係る竪型粉砕機の制御系統
図である。
FIG. 3 is a control system diagram of a vertical crusher according to the crushing equipment of the present invention.

【図4】本発明の粉砕設備に係る竪型粉砕機の層厚計の
概略説明図(縦断面図)である。
FIG. 4 is a schematic explanatory view (longitudinal sectional view) of a layer thickness gauge of a vertical pulverizer according to the pulverization equipment of the present invention.

【図5】従来の粉砕設備のフローシートである。FIG. 5 is a flow sheet of a conventional grinding facility.

【図6】従来の竪型粉砕機の全体縦断面図である。FIG. 6 is an overall vertical sectional view of a conventional vertical crusher.

【符号の説明】[Explanation of symbols]

1 竪型粉砕機 2 減速機 2A 可変速電動機 2K 定速モータ 3A 回転テーブル 4 粉砕ローラ 5 アーム 6 回転軸 9 油圧シリンダ 9A 油圧ユニット 15 ケーシング 60 原料コンベヤ 70 原料ホッパ 80 コンスタントフィード・ウェア 80a 可変速電動機 80b 秤量機 90 バケットエレベータ 100 振動篩 110 仕上ミル 120 分級装置 130 集塵装置 140 吸引ファン 200 振動計 210 層厚計 220 制御装置 A 2次コイル B 2次コイル C コア E 1次コイル R ロッド DESCRIPTION OF SYMBOLS 1 Vertical grinder 2 Reduction gear 2A Variable speed motor 2K Constant speed motor 3A Rotary table 4 Grinding roller 5 Arm 6 Rotating shaft 9 Hydraulic cylinder 9A Hydraulic unit 15 Casing 60 Raw material conveyor 70 Raw material hopper 80 Constant feed wear 80a Variable speed motor 80b Weighing machine 90 Bucket elevator 100 Vibrating sieve 110 Finishing mill 120 Classifier 130 Dust collector 140 Suction fan 200 Vibrometer 210 Layer thickness gauge 220 Controller A Secondary coil B Secondary coil C Core E Primary coil R Rod

フロントページの続き (58)調査した分野(Int.Cl.6,DB名) B02C 15/00,17/00,21/00,25/00Continuation of front page (58) Field surveyed (Int.Cl. 6 , DB name) B02C 15 / 00,17 / 00,21 / 00,25 / 00

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 予備粉砕機として使用する竪型粉砕機
と、該竪型粉砕機へ原料を供給する秤量機を備えた原料
供給設備と、該竪型粉砕機の粉砕産物を粉砕する仕上ミ
ルと、粉砕後の微粉を分級する分級装置と、分級後の精
粉を捕集する集塵装置ならびに吸引ファンとから構成さ
れる粉砕設備であって、 該竪型粉砕機は回転テーブルの外周部上面に複数個の回
転自在な粉砕ローラを配置し、該粉砕ローラを該回転テ
ーブルへ押圧する油圧力可変の油圧手段を備え、粉砕ロ
ーラに所定の粉砕力を与えて回転テーブル上面と粉砕ロ
ーラ周面との間で原料を粉砕する竪型粉砕機であって、
ケーシングに振動計を装着するとともに、運転中におけ
る回転テーブルと粉砕ローラ間の原料層厚を測定する層
厚計を備え、回転テーブル駆動用の電動機を可変速電動
機とし、かつ、前記振動計の指示値前記層厚計の指示
前記原料供給設備の秤量機の指示値を入力してあら
かじめ設定されたアルゴリズムにより振動レベルの判定
原料層厚の判定原料供給量の判定を行なってそれぞ
れの設定された適正値を逸脱したとき、前記油圧手段の
油圧力を変更するか、または該可変速電動機の回転数を
変更するか、原料供給量を変更する操作指令信号を発信
する制御装置を備え、前記回転テーブルの外周下部に粉
砕産物の排出口を具備してなる粉砕設備。
1. A vertical mill used as a preliminary mill, a raw material supply facility equipped with a weighing machine for supplying raw materials to the vertical mill, and a finishing mill for milling pulverized products of the vertical mill. And a classifying device for classifying fine powder after pulverization, a dust collecting device for collecting fine powder after classification, and a suction fan, wherein the vertical pulverizer is an outer peripheral portion of a rotary table. A plurality of rotatable crushing rollers are disposed on the upper surface, and a hydraulic means for varying the hydraulic pressure for pressing the crushing rollers against the rotary table is provided. A vertical pulverizer for pulverizing raw materials between surfaces,
A vibrometer is attached to the casing, and a layer thickness meter for measuring the thickness of the raw material layer between the rotary table and the crushing roller during operation is provided.A motor for driving the rotary table is a variable speed motor, and an instruction of the vibrometer is provided. determination of the vibration level by preset algorithm by inputting the indicated value of the weighing machine of the value and the indicated value of the layer thickness gauge material supply facilities
When the determination of the raw material layer thickness and the determination of the raw material supply amount deviate from the set appropriate values, whether to change the hydraulic pressure of the hydraulic means or to change the rotation speed of the variable speed motor And a control device for transmitting an operation command signal for changing a raw material supply amount, and a pulverized product including a pulverized product discharge port at a lower portion of the outer periphery of the rotary table.
JP3333841A 1991-10-18 1991-10-18 Crushing equipment Expired - Fee Related JP2795363B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3333841A JP2795363B2 (en) 1991-10-18 1991-10-18 Crushing equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3333841A JP2795363B2 (en) 1991-10-18 1991-10-18 Crushing equipment

Publications (2)

Publication Number Publication Date
JPH05104019A JPH05104019A (en) 1993-04-27
JP2795363B2 true JP2795363B2 (en) 1998-09-10

Family

ID=18270546

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3333841A Expired - Fee Related JP2795363B2 (en) 1991-10-18 1991-10-18 Crushing equipment

Country Status (1)

Country Link
JP (1) JP2795363B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104549690A (en) * 2014-12-10 2015-04-29 苏州路路顺机电设备有限公司 Ore grinding process

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4939145B2 (en) * 2006-08-21 2012-05-23 三菱重工業株式会社 Biomass crusher and control method thereof
JP5057213B2 (en) * 2007-01-26 2012-10-24 宇部興産機械株式会社 Control method of vertical crusher
JP4919159B2 (en) * 2007-01-26 2012-04-18 宇部興産機械株式会社 Method and apparatus for controlling vertical crusher
JP4953066B2 (en) * 2007-01-26 2012-06-13 宇部興産機械株式会社 Control method of vertical crusher
JP6127466B2 (en) * 2012-11-21 2017-05-17 株式会社Ihi Vertical roller mill

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH041660B2 (en) * 1984-07-26 1992-01-13 Mitsubishi Heavy Ind Ltd
JPS62286558A (en) * 1986-06-06 1987-12-12 Ube Industries Vertical type crusher
JPS6320047A (en) * 1986-07-10 1988-01-27 Ishikawajima Harima Heavy Ind Method and device for crushing raw material lump
JPS63147559A (en) * 1986-12-11 1988-06-20 Mitsubishi Heavy Ind Ltd Method of controlling bowl speed changer
JPH0626677B2 (en) * 1987-07-31 1994-04-13 宇部興産株式会社 Vertical roll mill operation control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104549690A (en) * 2014-12-10 2015-04-29 苏州路路顺机电设备有限公司 Ore grinding process

Also Published As

Publication number Publication date
JPH05104019A (en) 1993-04-27

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