JPS63118020A - Control method for moisture in sintering raw material - Google Patents
Control method for moisture in sintering raw materialInfo
- Publication number
- JPS63118020A JPS63118020A JP26188286A JP26188286A JPS63118020A JP S63118020 A JPS63118020 A JP S63118020A JP 26188286 A JP26188286 A JP 26188286A JP 26188286 A JP26188286 A JP 26188286A JP S63118020 A JPS63118020 A JP S63118020A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- moisture
- amount
- water
- added water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002994 raw material Substances 0.000 title claims abstract description 69
- 238000005245 sintering Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000002156 mixing Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、焼結プロセスにおける焼結原料の水分を制御
する装置に係り、特に、焼結機に供給される焼結原料の
水分値を、一定（目標水分値）におさえるようにした制
御系を有する焼結原料の水分制御方式に関するものであ
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for controlling the moisture content of sintering raw materials in a sintering process, and in particular, to a device for controlling the moisture content of sintering raw materials supplied to a sintering machine. , relates to a moisture control system for sintering raw materials having a control system that suppresses the moisture content to a constant value (target moisture value).
従来の装置は、特開昭５０−２０５２８号に記載の如く
、第２図に示すように、水分調節計２と流ｔ１１：Ａ節
計３との間に乗算機４を設け１、水分調節計出力ＱＢに
輸送量検出器５で検出した原料輸送量Ｕ（１）を遅延器
６を介して乗算した後、流量調節計３に加えて添加水量
を制御している。このとき焼結原料の水分Ｙ％と添加水
ｔｔＱｔ：／ｈとの間には（１）式の関係がある。As described in Japanese Patent Laid-Open No. 50-20528, the conventional device includes a multiplier 4 between the moisture controller 2 and the flow t11:A moderator 3, as shown in FIG. After multiplying the metered output QB by the raw material transportation amount U(1) detected by the transportation amount detector 5 via the delay device 6, the amount of added water is controlled in addition to the flow rate controller 3. At this time, there is a relationship expressed by equation (1) between the water content Y% of the sintering raw material and the added water ttQt:/h.
Ｕ（２）＋Ｑ Ｕ（２）＋に−ＱＢ−ｔＪ（２）
・・・・・（１）
ただし、Ｕ（２）は原料輸送ｔ （ｔ／ｈ）（水添加位
置〕
ＲＩＮは原料持込水分（％）
Ｋは原料輸送ｔｕが常用輸送地のとき
Ｑ＝ＱＢとなるように選んだ乗算器の
比例定数
一方、原料輸送ＭＵ（２）と添加水：ｂｔＱとの間に如
く近似できる。U(2)+Q U(2)+ -QB-tJ(2)
・・・・・・(1) However, U(2) is raw material transportation t (t/h) (water addition position) RIN is raw material moisture brought in (%) K is when raw material transportation tu is a regular transportation location Q= On the other hand, the proportionality constant of the multiplier selected to be QB can be approximated between the raw material transport MU (2) and the added water: btQ.
Ｙ＝ＲＩＮ＋に−ＱＢ ・・・・・・（
２）すなわち、原料輸送量Ｕ（２）の変動を補償し。Y=RIN+ -QB ・・・・・・(
2) In other words, compensate for fluctuations in the raw material transportation amount U(2).
水分調節計２の出力ＱＢによって添加水量Ｑを制御し原
料水分ＲＩＮの変化による焼結原料の水分Ｙの変化を押
えようとするものである。The amount of added water Q is controlled by the output QB of the moisture controller 2 to suppress changes in the moisture content Y of the sintered raw material due to changes in the raw material moisture RIN.
しかし、添加水の添加位置から水分検出器位置までの遅
れ時間（むだ時間）に対して配慮されていなかった。However, no consideration was given to the delay time (dead time) from the addition position of the added water to the moisture detector position.
上記従来技術は、ミキサーでの添加水の添加位置から、
焼結原料の水分値Ｙを検出する水分検出器までの遅れ時
間について配慮されておらず、水分検出器で測定された
焼結原料の水分値は、遅れ時間前に添加水の添加された
原料ＡＱに対するものであり、現時点でフィードバック
値として添加水の添加位！（ミキサー）にある原料Ａｏ
に対して、添加水量を決定した場合、原料ＡＱと原料Ａ
ｏの性状の違いから焼結原料の水分値を一定に推持する
ことに対して精度上問題があった。つまり、原料配合比
率の変動による持込水分、原料輸送量の大きな変動に対
しては、制御が安定しない。In the above conventional technology, from the addition position of the added water in the mixer,
No consideration is given to the delay time until the moisture detector detects the moisture value Y of the sintered raw material, and the moisture value of the sintered raw material measured by the moisture detector is based on the raw material to which added water was added before the lag time. This is for AQ, and the current feedback value is the addition level of added water! Raw material Ao in (mixer)
, when determining the amount of water added, raw material AQ and raw material A
Due to the difference in the properties of o, there was a problem in terms of accuracy in keeping the moisture value of the sintering raw material constant. In other words, control is not stable with respect to large fluctuations in the amount of moisture brought in and the amount of transported materials due to fluctuations in the raw material blending ratio.
本発明の目的は、上述の如き欠点を除去し、焼結原料の
水分を安定に制御できるようにしたものである。An object of the present invention is to eliminate the above-mentioned drawbacks and to make it possible to stably control the moisture content of the sintering raw material.
上記目的は、焼結原料の目標水分値からの偏差を補償す
るフィードバック制御系と、水添加位置にはいる原料を
目標水分値にするに必要な添加水量を、その原料の輸送
量、原料持込水分より決定するフィードフォワード制御
系から決定された各各の添加水量を、プロセスパラメー
タとなる原料総合輸送量、原料持込水分の変動状態より
重み付け加算し、添加水を制御することにより達成され
る。The above objectives are to develop a feedback control system that compensates for deviations from the target moisture value of the sintered raw material, and to determine the amount of added water necessary to bring the raw material entering the water addition position to the target moisture value, the amount of transported raw material, and the raw material retention. This is achieved by controlling the added water by weighting and adding each amount of added water determined by the feedforward control system, which is determined from the incorporated water content, based on the process parameters of the total amount of raw material transported and the fluctuation state of the raw material brought in moisture. Ru.
フィードバック系は、プロセスパラメータの小さな変動
、ノイズに対して精度よく添加水量を制御し、フィード
ファワード系は、プロセスパラメータの大きな変動に対
して応答性よく添加水量を制御する。それらの各々の特
徴をプロセス状態に合わせ、添加水量を決定することに
より、安定した焼結原料の水分制御を提供できる。The feedback system controls the amount of added water with high precision against small fluctuations in process parameters and noise, and the feedforward system controls the amount of added water with good responsiveness against large fluctuations in process parameters. By adjusting the characteristics of each of these to the process conditions and determining the amount of water added, stable moisture control of the sintered raw material can be provided.
以下、本発明の一実施例を第１図により説明する。流量
調節計３に入力される添加水量Ｑは、フィードバック系
で決定された添加水量ＱＢとフィードファワード系で決
定された添加水量ＱＦから添加水量調節計１０により決
定される。添加水量・ＱＢは、水分検出器１により水添
加後の原料の水分Ｙを検出してフィードバック水分調節
計２に人力し、目標水分値からの偏差に所望の演算を施
し決定される。添加水ｉＱＦは、各原料槽からの原料輸
送量Ｕ（１）ｉを輸送量検出器５で検出し、水添加位置
までの輸送時間を持つ遅延器を介した水添加位置の原料
輸送量Ｕ（２）ｉと、その原料輸送１ｔＪ（２）ｉ、実
績添加水量Ｐ（２）を水分検出器１までの輸送時間を持
つ遅延器７を介して、水分検出器１の位置での原料輸送
量Ｕ（３）ｉ、実績添加水量Ｐ（３）及び水分検出器１
により検出された水分Ｙより原料水分演算器８で決定さ
れた原料の持込水分ＲＩｉを、フィードフォワード水分
調節計９に入力し、目標水分値Ｒにするに必要な添加水
量として決定される。An embodiment of the present invention will be described below with reference to FIG. The added water amount Q input to the flow rate controller 3 is determined by the added water amount controller 10 from the added water amount QB determined by the feedback system and the added water amount QF determined by the feedforward system. The amount of added water QB is determined by detecting the moisture Y of the raw material after water addition using the moisture detector 1, manually inputting it to the feedback moisture controller 2, and performing a desired calculation on the deviation from the target moisture value. Added water iQF is determined by detecting the raw material transport amount U(1)i from each raw material tank with the transport amount detector 5, and detecting the raw material transport amount U at the water addition position via a delay device having a transport time to the water addition position. (2)i, its raw material transportation 1tJ(2)i, and actual added water amount P(2) are transported to the moisture detector 1 via a delay device 7 that has a transportation time to the moisture detector 1. amount U(3)i, actual added water amount P(3) and moisture detector 1
The brought-in moisture RIi of the raw material determined by the raw material moisture calculator 8 from the detected moisture Y is input to the feedforward moisture controller 9, and is determined as the amount of added water required to reach the target moisture value R.
ここで、フィードバック水分調節計２では、次式により
添加水量ＱＢを制御し原料水分ＲＩ Ｎ 。Here, the feedback moisture controller 2 controls the amount of added water QB using the following equation to calculate the raw material moisture RI N .
原料輸送量Ｕの変化による焼結原料の水分Ｙの変動を押
えようとするものである。This is intended to suppress fluctuations in the moisture content Y of the sintered raw material due to changes in the amount U of raw material transported.
Ｂ
Ｙ＃ＲＩＮ＋□ ・・・・・・（３）こ
れは、水分検出器１にある原料と水添加位置にある原料
の原料水分ＲＩＮ、輸送量Ｕの差が小さければ制御は安
定する。つまり。B Y#RIN+□ (3) This means that if the difference between the raw material moisture RIN and the transport amount U between the raw material at the moisture detector 1 and the raw material at the water addition position is small, the control will be stable. In other words.
Ｕ＝ΣＵ（ｊ）ｉ ・・・・・
（５）の関係式から
Ｕ（２）ｉ：Ｕ（３）ｉ ・・・・・
・（６）の条件であれば制御は安定する。U=ΣU(j)i...
From the relational expression (5), U(2)i:U(3)i...
- If the condition (6) is met, the control will be stable.
つぎに、フィードフォワード系において、原料水分演算
器８では次式により各原料槽の原料水分ＲＴｉを、寅算
する。Next, in the feedforward system, the raw material moisture calculator 8 calculates the raw material moisture RTi of each raw material tank using the following equation.
ただしＲｉは各原料槽内の原料の固有水分〔％〕である
。However, Ri is the inherent moisture [%] of the raw material in each raw material tank.
フィードフォワード水分調節Ｒ［９では、（９）式によ
り添加水−１ＱＦを制御し、焼結原料の水分が目標水分
値Ｒになるようにする。In feedforward moisture adjustment R[9, the added water -1QF is controlled by equation (9) so that the moisture content of the sintering raw material becomes the target moisture value R.
以上のように決定された添加水量ＱＢ、ＱＦを。Added water amounts QB and QF determined as above.
添加水量ｉ！１４節計１０は焼結プロセスを輸送される
原料の状態より
Ｑ＝ ａ−Ｑ Ｆ ＋（１−ａ）ＱＢ ・＝・
・（１０）の式で、重み係数ａを決定し、添加水量Ｑを
制御する０重み係数ａはＵ（２）ｉとＵ（３）ｉの偏差
傾向より決定される。Added water amount i! 14 Segment 10 is based on the condition of the raw material transported through the sintering process: Q = a-Q F + (1-a) QB ・=・
- In the equation (10), the weighting coefficient a is determined and the zero weighting coefficient a that controls the amount of added water Q is determined from the deviation tendency between U(2)i and U(3)i.
本発明によれば、各原料槽から輸送される原料の輸送量
、配合比率の変動による原料持込水分、輸送量等のプロ
セスパラメータの変化に対しても、その変化量が大きい
場合は、フィードフォワード系の添加水量の比重を多く
し添加水量を決定し、変化量が小さい場合は、フィード
バック系の添加水量の比重を多くし添加水量を決定し、
添加水量補償するようにしているので、焼結原料の水分
を安定に制御することができる。According to the present invention, even if process parameters such as the amount of raw material transported from each raw material tank and the amount of moisture brought in and transported due to fluctuations in the blending ratio change, if the amount of change is large, the feed Increase the specific gravity of the amount of added water in the forward system to determine the amount of added water, and if the amount of change is small, increase the specific gravity of the amount of added water in the feedback system to determine the amount of added water,
Since the amount of added water is compensated, the moisture content of the sintering raw material can be stably controlled.
第１図は本発明の焼結原料の水分制御方式の実施例を示
すブロック図、第２図は従来の焼結原料の水分を制御す
る場合の一例を示すブロック図である。
２・・水分調節計、３・・・流量調節計、８ 原料水分
演算器、９・・・フィードフォワード水分Ｆ１５１節計
。FIG. 1 is a block diagram showing an embodiment of the water content control system for a sintering raw material according to the present invention, and FIG. 2 is a block diagram showing an example of a conventional method for controlling water content in a sintering raw material. 2... Moisture controller, 3... Flow rate controller, 8 Raw material moisture calculator, 9... Feedforward moisture F151 saving meter.
Claims (1)
、焼結原料の目標水分値からの偏差を補償するフィード
バック制御系と、水添加位置にはいる原料を目標水分値
にするに必要な添加水量を、その原料の輸送量、原料持
込水分より決定するフィードファワード制御系から構成
され、各々の制御系より決定される添加水量を、各原料
槽からの原料輸送量の輸送比率（配合比率）、総合輸送
量の変動状態より重み付け加算し、添加水を制御するよ
うにして、配合比率の変化による原料持込水分、総合輸
送量の変動を補償するようにしたことを特徴とする焼結
原料の水分制御方式。1. In the sintering raw material moisture control system in the sintering process, there is a feedback control system that compensates for deviations from the target moisture value of the sintered raw material, and the amount of added water necessary to bring the raw material entering the water addition position to the target moisture value. is composed of a feedforward control system that determines the amount of raw material transported and the water content brought in, and the amount of added water determined by each control system is determined by the transport ratio (mixing ratio) of the amount of raw material transported from each raw material tank. ), the added water is weighted and added based on the fluctuation state of the total transportation amount, and the added water is controlled to compensate for fluctuations in raw material moisture brought in and the total transportation amount due to changes in the blending ratio. Moisture control method for raw materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26188286A JPS63118020A (en) | 1986-11-05 | 1986-11-05 | Control method for moisture in sintering raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26188286A JPS63118020A (en) | 1986-11-05 | 1986-11-05 | Control method for moisture in sintering raw material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63118020A true JPS63118020A (en) | 1988-05-23 |
| JPH046773B2 JPH046773B2 (en) | 1992-02-06 |
Family
ID=17368075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26188286A Granted JPS63118020A (en) | 1986-11-05 | 1986-11-05 | Control method for moisture in sintering raw material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63118020A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100415931B1 (en) * | 1999-10-26 | 2004-01-31 | 주식회사 포스코 | Water injection controlling method of raw materials for making sintered ore |
| CN105716987A (en) * | 2016-05-05 | 2016-06-29 | 中冶北方（大连）工程技术有限公司 | Sintered batch moisture detection and analysis device and analyzing method thereof |
-
1986
- 1986-11-05 JP JP26188286A patent/JPS63118020A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100415931B1 (en) * | 1999-10-26 | 2004-01-31 | 주식회사 포스코 | Water injection controlling method of raw materials for making sintered ore |
| CN105716987A (en) * | 2016-05-05 | 2016-06-29 | 中冶北方（大连）工程技术有限公司 | Sintered batch moisture detection and analysis device and analyzing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH046773B2 (en) | 1992-02-06 |
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