JPS6331347B2 - - Google Patents
Info
- Publication number
- JPS6331347B2 JPS6331347B2 JP15650982A JP15650982A JPS6331347B2 JP S6331347 B2 JPS6331347 B2 JP S6331347B2 JP 15650982 A JP15650982 A JP 15650982A JP 15650982 A JP15650982 A JP 15650982A JP S6331347 B2 JPS6331347 B2 JP S6331347B2
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- concentration
- classification tank
- level
- flow rate
- 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
Links
- 239000002002 slurry Substances 0.000 claims description 76
- 239000003082 abrasive agent Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 238000013019 agitation Methods 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000011538 cleaning material Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Description
【発明の詳細な説明】
本発明は、分級槽から供給するスラリーの濃度
を調整する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for adjusting the concentration of slurry supplied from a classification tank.
供給されたスラリー或いは循環スラリーを分級
槽において分級し、調整されたスラリーとするこ
とはよく知られている。例えばストリツプ表面に
砂鉄などの研掃材を高圧水によつて加速して衝突
させ、表面上のスケールを除去する所謂メカニカ
ルデスケーリング法では、前記研掃材はスラリー
として供給される。 It is well known that a supplied slurry or circulating slurry is classified in a classification tank to obtain an adjusted slurry. For example, in the so-called mechanical descaling method in which scale on the surface is removed by impinging an abrasive material such as iron sand on the surface of the strip while being accelerated by high-pressure water, the abrasive material is supplied as a slurry.
かかる投射後のスラリーは再び分級槽に給送さ
れ、損失分を補充すべくあらたな砂鉄を供給し、
分級して投射用スラリーとなる。このようなデス
ケーリング法での脱スケール能力は、投射ノズル
に供給されるスラリー濃度に依存しており、従つ
て供給スラリーは安定した濃度を維持する必要が
あり、又所定の濃度を容易に確保できることが肝
要である。 The slurry after such projection is again fed to the classification tank, and new iron sand is supplied to replenish the lost amount.
It is classified and becomes a slurry for projection. The descaling ability of such descaling methods depends on the slurry concentration supplied to the projection nozzle, and therefore the supplied slurry must maintain a stable concentration, and a predetermined concentration must be easily ensured. It is important that you can do it.
ところが砂鉄などの研掃材のように、比重の大
きい粉粒状物は分級槽底部に急速に沈下してしま
い、そのまゝでは取出し不可能であり、通常は分
級槽上部の水を分級槽底部より撹拌水として供給
し、研掃材を流動状態としてポンプによりスラリ
ーとして取出すことになる。従つてこのような分
級槽では取出したスラリーを測定してスラリー濃
度を求め、例えば前記撹拌力を変えて供給するス
ラリー濃度を調整することはできるが、ある測定
時間、調整時間を必要とするので応答性に問題が
あり、デスケーリングが安定して行なわれない。 However, particles with high specific gravity, such as abrasive materials such as iron sand, quickly sink to the bottom of the classification tank and cannot be taken out as they are, so normally the water at the top of the classification tank is drained to the bottom of the classification tank. The abrasive material is supplied as agitated water, and the abrasive material is brought into a fluid state and taken out as a slurry using a pump. Therefore, in such a classification tank, it is possible to determine the slurry concentration by measuring the slurry taken out and adjust the supplied slurry concentration by changing the stirring force, but this requires a certain amount of measurement time and adjustment time. There are problems with responsiveness and descaling is not performed stably.
しかも分級槽内の研掃材量が変動すればスラリ
ー濃度も変動するので、正確な調整は循環使用―
補充という場合には、分級槽内の研掃材量の把握
が難しいこともあつて一層難しくなる。 Moreover, if the amount of abrasive in the classification tank fluctuates, the slurry concentration will also fluctuate, so accurate adjustment is required for cyclic use.
Replenishment becomes even more difficult because it is difficult to ascertain the amount of abrasive material in the classification tank.
本発明は、これらの点について種々検討の結
果、一定の撹拌状態にある研掃材の分級槽レベル
は再現性があり、しかも供給スラリー濃度に密接
な関係があることに着目し、これを利用して、分
級槽において予じめ所定の供給スラリー濃度とす
るようにしたものである。 As a result of various studies on these points, the present invention has focused on the fact that the level of the classification tank of the abrasive under constant agitation is reproducible and is closely related to the supply slurry concentration, and utilizes this fact. In this way, a predetermined slurry concentration is set in advance in the classification tank.
即ち砂鉄など比重の大きい研掃材は、撹拌しな
い限り槽内に急速に沈下してしまうことは前述し
た通りであるが、この状態でレベルを測定しても
スラリーとして取出しは不可能であることもさる
ことながら、仮りに取出したとしても、スラリー
レベルがどうであろうと濃度は一定である。 In other words, as mentioned above, abrasive materials with a high specific gravity such as iron sand will quickly sink into the tank unless stirred, but even if the level is measured in this state, it is impossible to take it out as a slurry. Moreover, even if the slurry is removed, the concentration remains constant regardless of the slurry level.
つまり前述の状態ではスラリー濃度とスラリー
レベルは何等の関係ももつていないが、これを撹
拌状態とすることによつて両者の相関を見出し、
（正確な分級槽研掃材量の把握は不要）これをス
ラリー濃度調整に活用することに本発明の特色が
ある。 In other words, in the above-mentioned state, there is no relationship between the slurry concentration and the slurry level, but by creating a stirring state, a correlation between the two can be found.
(It is not necessary to accurately determine the amount of cleaning material in the classification tank.) The present invention is characterized by utilizing this information to adjust the slurry concentration.
以下本発明を図面に示す実施例に基づいて具体
的に説明する。 The present invention will be specifically described below based on embodiments shown in the drawings.
まず第１図は本発明を適用する分級槽及びその
出入系路の全体図を示している。即ち１は分級槽
であり、分級槽１内にはスラリー状の研掃材２と
その上部の水３が充填され、余剰水或いは所定サ
イズ以下の微細な研掃材は余剰水とともに分級槽
１より溢流する。研掃材損失分は系路４から補充
され、一旦投射された回収スラリーは系路５から
供給される。 First, FIG. 1 shows an overall diagram of a classification tank to which the present invention is applied and its inlet/outlet route. That is, 1 is a classification tank, and the classification tank 1 is filled with a slurry-like abrasive material 2 and water 3 above it, and excess water or fine abrasive material of a predetermined size or less is passed into the classification tank 1 along with the surplus water. More overflow. The lost abrasive material is replenished from the system 4, and the recovered slurry once projected is supplied from the system 5.
分級槽１の上部の水は、系路６によりポンプ７
を介して分級槽底部より撹拌水として供給し、研
掃材を撹拌し、前記のスラリーとする。該スラリ
ーはポンプ８を介して取出され、投射用ノズル部
（図示せず）に圧送される。分級槽１内にはスラ
リーレベル計９が配置され、流動状態にあるスラ
リーのレベルを測定するようになつている。Ａは
スラリーレベルの制御範囲を示す。 The water in the upper part of the classification tank 1 is pumped to the pump 7 by the system line 6.
The abrasive material is supplied as agitation water from the bottom of the classification tank through the agitator, and the abrasive material is agitated to form the slurry. The slurry is taken out via the pump 8 and pumped to a projection nozzle (not shown). A slurry level meter 9 is arranged in the classification tank 1 to measure the level of the slurry in a fluid state. A indicates the control range of the slurry level.
スラリーレベル計９は例えば音叉式スラリーレ
ベル計を用いる。 As the slurry level meter 9, for example, a tuning fork type slurry level meter is used.
第２図によつてその作動原理を示す。ａは音叉
であり、その内部には２個のピエゾ素子ｂがあ
り、アンプｃとピエゾ素子ｂの間で正帰還回路を
作つて、音叉ａは常に一定の周波数で振動してい
る。スラリーのレベルが上昇して音叉ａがスラリ
ーに覆われ、その振動が減衰すると、その信号は
アンプｃ、整流装置ｄ、直流―交流変換装置ｅを
介して、設定基準電圧装置ｆからの出力と比較し
ながらサーボモーターｇを駆動し、捲取ドラムｈ
にワイヤーｉを介して音叉ａが捲上げられる。音
叉の振動が以前の状態に戻る点、即ち新しいスラ
リーレベルに位置するように音叉本体ａが移動す
る。 The principle of its operation is shown in FIG. A is a tuning fork, and there are two piezo elements b inside it.A positive feedback circuit is created between the amplifier c and the piezo elements b, so that the tuning fork a always vibrates at a constant frequency. When the level of the slurry rises and the tuning fork a is covered with the slurry, and its vibration is damped, the signal is output from the set reference voltage device f via the amplifier c, the rectifier d, and the DC-AC converter e. While comparing, drive the servo motor g and rotate the winding drum h.
Tuning fork a is wound up via wire i. The tuning fork body a is moved so as to be located at the point where the vibration of the tuning fork returns to its previous state, ie at the new slurry level.
またスラリーレベルが下降すると、音叉ａが開
放されその振動は大きくなり、上昇の場合とは逆
の動きにより、音叉ａを下降させる方向にサーボ
モーターｇを駆動させ、捲取ドラムｈによりワイ
ヤーｉを介して音叉ａを下降させる。 When the slurry level falls, the tuning fork a is opened and its vibration increases, and the servo motor g is driven in the direction of lowering the tuning fork a by the opposite movement to the rising case, and the wire i is pulled by the winding drum h. lower the tuning fork a.
こうして音叉ａは常にスラリーの変動に追従す
ることになる。この音叉の位置は捲取ドラムｈよ
りくり出されたワイヤーｉの長さからスラツジレ
ベルとして、連続的にメーターｊに表示される。 In this way, the tuning fork a always follows the fluctuations of the slurry. The position of this tuning fork is continuously displayed on a meter j as a sludge level based on the length of the wire i drawn out from the winding drum h.
分級槽スラリーレベル（mm）と供給スラリー濃
度には一定の相関があり、しかもこれらの関係は
撹拌流速によつて異なる。又それぞれの関係はあ
る一定のスラリーレベルになるとスラリー濃度も
ほゞ一定値になる。 There is a certain correlation between the slurry level (mm) in the classification tank and the concentration of the supplied slurry, and this relationship differs depending on the stirring flow rate. Also, regarding each relationship, when the slurry level reaches a certain level, the slurry concentration also becomes a substantially constant value.
従つて、このような関係を予じめその分級槽に
おける特性値として求めておくことにより、例え
ば供給スラリー濃度を一定値まで高めたい場合に
は、前記関係に従つて撹拌流速を低下させるか、
又はスラリーレベルを高めるように補給砂鉄を増
加させ、又供給スラリー濃度を一定値まで低下さ
せたい場合には、撹拌流速を高める側に操作する
ことにより所定濃度のスラリーを得、又一定濃度
に維持させることができる。 Therefore, by determining such a relationship in advance as a characteristic value for the classification tank, for example, when it is desired to increase the supply slurry concentration to a certain value, the stirring flow rate can be reduced in accordance with the above relationship, or
Or, if you want to increase the supplementary iron sand to raise the slurry level, or lower the supply slurry concentration to a certain value, increase the stirring flow rate to obtain slurry of the specified concentration and maintain it at a constant concentration. can be done.
第３図に実際のスラリー濃度の制御フローを示
す。即ち、制御器１０には、供給スラリー濃度
ａ、スラリーレベルｂ及び撹拌流速ｃが入力さ
れ、又さらにスラリー濃度設定器１１及び撹拌流
速ごとのスラリー濃度とスラリーレベルの関係の
記憶装置１２の信号を入力して、撹拌流速の調整
信号ｄ又は砂鉄供給量調整信号ｅの少なくとも１
つを出力する。なおスラリー濃度の実測値の信号
ａは確認信号であり、必ずしも制御用信号として
用いる必要はない。 FIG. 3 shows the actual control flow for slurry concentration. That is, the supplied slurry concentration a, the slurry level b, and the agitation flow rate c are input to the controller 10, and the signal from the slurry concentration setting device 11 and the storage device 12 for the relationship between the slurry concentration and slurry level for each agitation flow rate is inputted to the controller 10. At least one of the stirring flow rate adjustment signal d or the iron sand supply amount adjustment signal e
Output one. Note that the signal a of the actual value of the slurry concentration is a confirmation signal and does not necessarily need to be used as a control signal.
かかる調整方法を採用することにより、極めて
容易に供給スラリー濃度の調整を行なうことがで
きる。しかし必ずしも、第３図に掲げたような本
格的な制御装置を設ける必要はなく、例えば予じ
め求めたスラリー濃度とスラリーレベルの関係に
従つてスラリーレベルを監視し、これによりマニ
ユアルで撹拌流速、或いはスラリーレベルをコン
トロールしてもよい。 By employing such an adjustment method, the concentration of the supplied slurry can be adjusted very easily. However, it is not necessarily necessary to provide a full-fledged control device as shown in Figure 3. For example, the slurry level can be monitored according to the relationship between the slurry concentration and slurry level determined in advance, and the stirring flow rate can be controlled manually. , or the slurry level may be controlled.
次に本発明の実施例を説明する。 Next, embodiments of the present invention will be described.
第４図は実際の制御例を示しており、イはスラ
リーレベル、ロは撹拌流速、ハは研掃材の補給、
ニはスラリー濃度のそれぞれ同時的推移である。 Figure 4 shows an actual control example, where A is the slurry level, B is the stirring flow rate, C is the supply of abrasive material,
D is the simultaneous change in slurry concentration.
分級槽より取出したスラリー濃度が低下した場
合は、前述のように分級槽に対して研掃材を補給
してスラリーレベルを上昇させる方法と分級槽撹
拌流速を減じる方法があるが、研掃材の補給に対
し撹拌流速の減少の方が時間的な対応が速いた
め、一旦撹拌流速を減じて（図ロのＡ）スラリー
濃度ニを所要濃度まで増大させ、同時に分級槽へ
の研掃材の補給を開始する。（図ハのＡ）
分級槽スラリーレベル（図イ）は時間とともに
上昇し分級槽から取出すスラリー濃度ニは増大し
てくるが、これが所要濃度の限界を超える場合は
分級槽の撹拌流速を増大させ、スラリー濃度が低
下するように操作する。 If the concentration of the slurry taken out from the classification tank decreases, there are two ways to increase the slurry level by replenishing the classification tank with abrasive as described above, and to reduce the agitation flow rate of the classification tank. Reducing the agitation flow rate has a faster time response to replenishment of the slurry, so first reduce the agitation flow rate (A in figure 2) to increase the slurry concentration D to the required concentration, and at the same time add the abrasive to the classification tank. Start supplying. (A in Figure C) The slurry level in the classification tank (Figure A) increases with time, and the concentration of slurry taken out from the classification tank increases, but if this exceeds the required concentration limit, increase the stirring flow rate in the classification tank. , operate so that the slurry concentration decreases.
スラリー濃度が過度に高くなつた場合にも同様
に逆操作を行ない、絶えず撹拌流速、スラリーレ
ベルもしくはその両方を制御することにより、所
要のスラリー濃度を得ることができる。 Even if the slurry concentration becomes too high, the desired slurry concentration can be obtained by performing the same reverse operation and constantly controlling the stirring flow rate, the slurry level, or both.
本発明によれば、前記のように極めて高効率、
高精度でスラリー濃度を制御でき、安定した脱ス
ケールを図ることができる。 According to the present invention, extremely high efficiency and
Slurry concentration can be controlled with high precision and stable descaling can be achieved.
第１図は本発明が適用される分級槽及びその出
入側系路の全体説明図、第２図は分級槽内のスラ
リーレベル操作例の模式図、第３図は分級槽にお
けるスラリー濃度制御方式の説明図、第４図は本
発明の実施例の図表を示している。
Fig. 1 is an overall explanatory diagram of the classification tank to which the present invention is applied and its inlet/outlet system, Fig. 2 is a schematic diagram of an example of slurry level operation in the classification tank, and Fig. 3 is a slurry concentration control method in the classification tank. FIG. 4 shows a diagram of an embodiment of the present invention.
Claims (1)
より圧送する撹拌水によつて流動させつつスラリ
ーレベルを測定し、一方予じめ撹拌流速ごとに求
めたスラリーレベルとスラリー濃度との関係か
ら、当該分級槽からのスラリー供給濃度が所定の
値となるように、研掃材の補給によるスラリーレ
ベル又は撹拌流速の少くとも一方を調整すること
を特徴とする分級槽から供給するスラリー濃度調
整方法。1 The slurry level is measured while the abrasive material supplied into the classification tank is made to flow by stirring water pumped from the bottom of the classification tank, and the slurry level determined in advance for each stirring flow rate is compared with the slurry concentration. Based on the relationship, the slurry concentration supplied from the classification tank is characterized by adjusting at least one of the slurry level by replenishing abrasive material or the stirring flow rate so that the slurry supply concentration from the classification tank becomes a predetermined value. Adjustment method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15650982A JPS5947164A (en) | 1982-09-10 | 1982-09-10 | Control of concentration of slurry supplied from classifying tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15650982A JPS5947164A (en) | 1982-09-10 | 1982-09-10 | Control of concentration of slurry supplied from classifying tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5947164A JPS5947164A (en) | 1984-03-16 |
| JPS6331347B2 true JPS6331347B2 (en) | 1988-06-23 |
Family
ID=15629315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15650982A Granted JPS5947164A (en) | 1982-09-10 | 1982-09-10 | Control of concentration of slurry supplied from classifying tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5947164A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103419140A (en) * | 2012-05-25 | 2013-12-04 | 宝山钢铁股份有限公司 | Supplied sand concentration control method for post-mixing high-pressure jet cleaning, and apparatus thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61197326U (en) * | 1985-05-30 | 1986-12-09 | ||
| JPH0230216Y2 (en) * | 1986-03-06 | 1990-08-14 | ||
| WO2013046854A1 (en) * | 2011-09-26 | 2013-04-04 | 新東工業株式会社 | Blasting device and blasting method |
-
1982
- 1982-09-10 JP JP15650982A patent/JPS5947164A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103419140A (en) * | 2012-05-25 | 2013-12-04 | 宝山钢铁股份有限公司 | Supplied sand concentration control method for post-mixing high-pressure jet cleaning, and apparatus thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5947164A (en) | 1984-03-16 |
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