JPS6256535A - Method for controlling moisture in sintering machine - Google Patents
Method for controlling moisture in sintering machineInfo
- Publication number
- JPS6256535A JPS6256535A JP19818285A JP19818285A JPS6256535A JP S6256535 A JPS6256535 A JP S6256535A JP 19818285 A JP19818285 A JP 19818285A JP 19818285 A JP19818285 A JP 19818285A JP S6256535 A JPS6256535 A JP S6256535A
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- Prior art keywords
- moisture
- mixer
- water
- raw material
- meter
- Prior art date
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は品質の安定した焼結鉱を製造ずべく焼結原料の
水分を制御する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for controlling the moisture content of a sintering raw material in order to produce sintered ore of stable quality.
（従来技術〕
高炉へ装入される主原料たる焼結鉱は粉鉱等の焼結原料
を焼結設備にて焼成して製造されており、焼結原料は通
気性を確保して焼結設備での生産性を向上させ、また焼
結鉱品質を安定化させるために擬似粒化されて粗大化せ
しめられる。(Prior art) Sintered ore, which is the main raw material charged into a blast furnace, is manufactured by firing sintered raw materials such as fine ore in sintering equipment, and the sintered raw materials are sintered while ensuring air permeability. In order to improve the productivity of the equipment and stabilize the quality of the sintered ore, it is made into pseudo-granules and coarsened.
この擬似粒化のためには焼結設備へ供給する焼結原料中
へ水分を適当量含有せしめることが重要であり、このた
め焼結設備には一般に焼結機の前段に混合造粒設備が設
置されており、ここで水分管理を行っている。To achieve this pseudo-granulation, it is important to contain an appropriate amount of moisture in the sintering raw material supplied to the sintering equipment, and for this reason, the sintering equipment generally includes mixing and granulation equipment before the sintering machine. It is installed here, and moisture management is carried out here.
さて、焼結設備における操業内容については、第２図に
示すように原料槽２から切り出された焼結原料は、ベル
トコンベア３にて焼結機４０へ移送される間に第１造粒
ミキサー１０．第２造粒ミキサー２０にて注水され、こ
れらにおいて擬似粒化して粗大化し、焼結機４０の原料
サージホッパー４１へ装入され、次いでここから切り出
された焼結染料は焼結機４０にて焼成されて焼結鉱とな
る。Now, regarding the operation details of the sintering equipment, as shown in FIG. 10. Water is injected into the second granulation mixer 20, where it is pseudo-granulated and coarsened, and then charged into the raw material surge hopper 41 of the sintering machine 40, and then the sintered dye cut out from there is sent to the sintering machine 40. It is fired and becomes sintered ore.
上記造粒ミキサーでは焼結原料の水分を適当量に調整す
べく注水量制御が行われており、その注水量制御は中性
子水分計方式と赤外線水分計方式とに大別される。In the above-mentioned granulation mixer, water injection amount control is performed in order to adjust the moisture content of the sintering raw material to an appropriate amount, and the water injection amount control is roughly divided into a neutron moisture meter method and an infrared moisture meter method.
前者の中性子水分計方式は、第２図の原料サージホッパ
４１へ取付けた中性子水分計４２にて原料中の水分を測
定し、この測定値に基づき水分が目標値となるようにバ
ルブ２１の開度を調整して第２造粒ミキサー２０での注
水量を制御している。しかしながらこの方式の場合は対
象原料の水分応答遅れが生じ、焼結原料中の水分を十分
に調整できなかった。これは水分側定位ぽ〜注水位置間
距離が離れているためであり、具体的には造粒ミキサー
内での混合滞留時間が約１〜４分、造粒ミキサー原料サ
ージホッパーーまでのベルトコンへアによる搬送時間が
約０．５〜２分、原料サージホッパー内での中性子水分
計の検出位置までの原料滞留時間が約１〜２分掛かり、
更に中性子水分計での測定誤差低減のために時定数が約
０．５〜１分必要だからである。The former neutron moisture meter method measures the moisture in the raw material with a neutron moisture meter 42 attached to the raw material surge hopper 41 shown in FIG. is adjusted to control the amount of water poured into the second granulation mixer 20. However, with this method, there was a delay in response to the moisture content of the target raw material, and the moisture content in the sintered raw material could not be adequately adjusted. This is due to the distance between the water side positioning port and the water injection position. Specifically, the mixing residence time in the granulation mixer is about 1 to 4 minutes, and the belt controller from the granulation mixer raw material surge hopper to the granulation mixer raw material surge hopper. It takes about 0.5 to 2 minutes for transportation by A, and it takes about 1 to 2 minutes for the raw material to reside in the raw material surge hopper to the detection position of the neutron moisture meter.
Furthermore, a time constant of approximately 0.5 to 1 minute is required to reduce measurement errors in a neutron moisture meter.
後者の赤外線水分計方式は、第３図に示す如く第２造粒
ミキザー２０の後に赤外線水分計３０を配してこれにて
原料中の水分を測定し、このＩＩＩ定値に基づいて水分
が目標値となるようにバルブ２１の開度を調整して第２
造粒ミキサー２０での注水量を制御している。In the latter infrared moisture meter method, as shown in Figure 3, an infrared moisture meter 30 is placed after the second granulation mixer 20 to measure the moisture in the raw material, and the target moisture content is determined based on this III constant value. Adjust the opening degree of the valve 21 so that the second
The amount of water injected into the granulation mixer 20 is controlled.
この方式の場合は中性子水分計方式の場合と異なり制御
の遅れが少ないが、赤外線水分計の測定精度、制御内容
等に問題がある。即ち、赤外線水分計は測定に際して焼
結原料の色１粒度及び太陽光等の外来光等によって影響
を受け、例えば原料銘柄毎の配合率の変化、注水量変化
による色変化等により影響を受けて測定誤差を生じ、こ
のため水分を目標値に調整できなかった。Unlike the neutron moisture meter method, this method has less delay in control, but there are problems with the measurement accuracy and control details of the infrared moisture meter. In other words, when measuring, an infrared moisture meter is affected by the grain size of the sintered raw material, external light such as sunlight, etc.For example, it is affected by changes in the blending ratio of each raw material brand, color changes due to changes in the amount of water poured, etc. A measurement error occurred, and as a result, the moisture content could not be adjusted to the target value.
また赤外線水分計が層状に積載された焼結原料の表面性
状、測定距離変化等によっても影響を受ける。したがっ
てこの影響を防止すべくベルトコンベア３上の原料高さ
を一定にするように掻き坂９ （第３図に示す）を設け
ている。The infrared moisture meter is also affected by the surface properties of the sintered raw materials stacked in layers, changes in the measurement distance, etc. Therefore, in order to prevent this effect, a scraping slope 9 (shown in FIG. 3) is provided to keep the height of the raw material on the belt conveyor 3 constant.
更に、この方式の場合には、測定位置が上流側にあるた
め、注水された焼結原料が焼結機４０へ供給される迄の
期間に蒸発する水分量を把握し稚く、このため焼結原料
中の水分量を目的値に一致させることが困難であった。Furthermore, in the case of this method, since the measurement position is on the upstream side, it is difficult to ascertain the amount of water that evaporates during the period until the injected sintering raw material is supplied to the sintering machine 40. It was difficult to make the water content in the coagulating material match the target value.
なお、前述の焼結原料の色５粒度等による赤外線水分計
の測定誤差を解消すべく特開昭５８−３１０３８号が提
案されているが、この方法は測定誤差を無くずことが可
能であるが、他の問題については解決できなかった。Note that Japanese Patent Application Laid-Open No. 1983-31038 has been proposed in order to eliminate the measurement error of an infrared moisture meter due to the color, particle size, etc. of the sintered raw material, but this method can eliminate measurement errors. However, other issues could not be resolved.
本発明は斯かる事情に鑑みてなされたものであり、その
目的とするところは焼結原料への注水をフィードフォワ
ード制御及びフィードバック；ｌＩ制御することによっ
て制御遅れがなく、しかも焼結原料中の水分の調整精度
が高い焼結原料の水分制御方法を提供するにある。The present invention was made in view of the above circumstances, and its purpose is to perform feedforward control and feedback of water injection into the sintering raw material; An object of the present invention is to provide a method for controlling the moisture content of sintered raw materials with high moisture content adjustment accuracy.
本発明に係る焼結原料の水分制御方法は、造粒ミキサー
を備えた焼結設備にて焼結原料の水分を目標水分に制御
する方法において、焼結原料の水分を最終目標水分にす
べく注水する造粒ミキサーの上流側及び下流側に赤外線
水分計を配してこれらにて水分を測定し、上流側の赤外
線水分計の測定値に基づいて造粒ミキサーでの注水量を
フィードフォワード制御し、また下流側の赤外線水分計
の測定値に基づいて造粒ミキサーでの注水量をフィード
バック制御し、上記フィードフォワード制御系へ補正を
加えることを特徴とする。The method for controlling the moisture content of a sintered raw material according to the present invention is a method for controlling the moisture content of a sintered raw material to a target moisture content in a sintering equipment equipped with a granulation mixer. Infrared moisture meters are placed upstream and downstream of the granulation mixer that injects water, and these measure the moisture content, and the amount of water injected into the granulation mixer is feedforward controlled based on the measured value of the upstream infrared moisture meter. The present invention is also characterized in that the amount of water injected into the granulation mixer is feedback-controlled based on the measured value of an infrared moisture meter on the downstream side, and correction is added to the feedforward control system.
以下本発明を図面に基づき具体的に説明する。 The present invention will be specifically explained below based on the drawings.
第１図は本発明の実施状態を示す模式図であり、図中１
は混合造粒設備を示す、原料槽２は混合造粒設備１の上
流側に配してあり、これには焼結原料が貯留されており
、焼結原料はこの下部よりベルトコンベア３上へ所定量
切り出されて白抜矢符方向へ移送される。FIG. 1 is a schematic diagram showing the implementation state of the present invention, and in the figure 1
indicates the mixing and granulation equipment. The raw material tank 2 is arranged upstream of the mixing and granulation equipment 1, and the sintering raw material is stored in this tank, and the sintering raw material is transferred from the bottom of this tank onto the belt conveyor 3. A predetermined amount is cut out and transported in the direction of the white arrow.
原料槽２の下流側には重量計量計４が設置されており、
ヘルドコンベア３上の焼結原料はこれにて重量が測定さ
れて第１造粒ミキサー１０へ導入される。重量側定値は
第１造粒ミキサー用制御器５及び第２造粒ミキサー用制
御器６へ与えられる。A weighing scale 4 is installed downstream of the raw material tank 2.
The weight of the sintered raw material on the heald conveyor 3 is measured and introduced into the first granulation mixer 10. The fixed value on the weight side is given to the first granulation mixer controller 5 and the second granulation mixer controller 6.
第１造粒ミキザー１０へ導入された焼結原料はここで注
水される。このとき水流量調節器１３は制御器５からの
出力信号に基づきバルブ１１の開度を調整し、この開度
に基づいた水量がバルブ１工を通って第ｊ造粒ミキサー
１０へ供給されている。また水流量調節器１３にはバル
ブ１１よりも水源（図示せず）側に取付けられた流量計
１２がらのフィードバンク信号が入力されるようになっ
ており、流量計１２は水／ｊＬ量波節器１３の外に制御
器５へ測定信号を出方している。そして第工造粒ミキサ
ーエ０にて注水された焼結原料は第１造粒ミキサー１０
の下流側に設けた掻き板９にて掻かれた後、第２造粒ミ
キサー２０の方へ送られていく。Water is poured into the sintering raw material introduced into the first granulation mixer 10 here. At this time, the water flow rate regulator 13 adjusts the opening degree of the valve 11 based on the output signal from the controller 5, and the amount of water based on this opening degree is supplied to the j-th granulation mixer 10 through the first valve. There is. In addition, a feed bank signal from a flow meter 12 installed on the water source (not shown) side of the valve 11 is input to the water flow rate regulator 13, and the flow meter 12 is configured to receive a water/jL quantity wave. A measurement signal is output from the controller 5 to the outside of the controller 13. Then, the sintering raw material injected with water in the first granulation mixer E0 is transferred to the first granulation mixer 10.
After being scraped by a scraping plate 9 provided on the downstream side of the granulation mixer 20, the pellets are sent to the second granulation mixer 20.
第１３ｒｉ粒ミキサー１０〜第２造粒ミキサー２０間の
掻き板９の下流側には焼結原料を臨む位置に例えば３波
長方式の赤外線水分計３０ａが設置されており、赤外線
水分計３０ａは第１造粒ミキサー１０にて注水された焼
結原料中の水分を測定し、測定信号は水分計液接部３０
ｂにて水分量に関する電気信号に変襖されて前記制御器
５及び６へ出力される。On the downstream side of the scraping plate 9 between the 13th RI grain mixer 10 and the second granulation mixer 20, for example, a three-wavelength infrared moisture meter 30a is installed at a position facing the sintering raw material. 1 Measure the moisture in the sintering raw material injected with water in the granulation mixer 10, and the measurement signal is sent to the moisture meter liquid contact part 30.
At step b, the signal is converted into an electrical signal relating to the moisture content and is output to the controllers 5 and 6.
水分が測定された後、焼結原料は第２造粒ミキサー２０
へ導入されてここで更に注水される。このとき水流量調
節器２３は制御器６の出力信号に基づきバルブ２Ｉの開
度を４節し、この開度に基づいた水量がバルブ２１を通
って第２造粒ミキサー２０へ供給されている。また水流
量調節器２３及びホ１ｊ御器６にはバルブ２１よりも水
源（図示せず）側に取付けられた流量計２２からのフィ
ードバック信号が入力されるようになっている。After the moisture content is measured, the sintering raw material is transferred to the second granulation mixer 20.
water is introduced into the tank, where it is further injected with water. At this time, the water flow rate regulator 23 sets the opening degree of the valve 2I to four positions based on the output signal of the controller 6, and the amount of water based on this opening degree is supplied to the second granulation mixer 20 through the valve 21. . Further, a feedback signal from a flow meter 22 installed closer to the water source (not shown) than the valve 21 is input to the water flow rate regulator 23 and the water controller 6.
第２造粒ミキサー２０にて注水された焼結原料はその下
流便Ｉに設けた橿き板９′にて掻かれた後、焼結機４０
の方へ送られていく。The sintering raw material injected with water in the second granulation mixer 20 is scraped by a sintering plate 9' provided in the downstream feed I, and then transferred to the sintering machine 40.
will be sent to.
上記撞き板９′の下流側には焼結原料を臨む位置に例え
ば３波長方式の赤外線水分計３１ａが設置されており、
赤外線水分計３１．１は第２造粒ミキザー２０までに注
水された焼結原料中の水分を測定し、測定信号は水分計
変換部３１ ｂにて水分量に関する電気信号に変倹され
て前記制御器６へ出力される。For example, a three-wavelength infrared moisture meter 31a is installed at a position facing the sintering raw material on the downstream side of the sliding plate 9'.
The infrared moisture meter 31.1 measures the moisture in the sintering raw material that has been injected up to the second granulation mixer 20, and the measurement signal is converted into an electric signal related to the moisture content by the moisture meter converter 31b. It is output to the controller 6.
水分が測定された後、焼結原料は焼結機４０の染料サー
ジホッパー４１へ装入される。After the moisture content is measured, the sintering raw material is charged into the dye surge hopper 41 of the sintering machine 40.
前記制御器５及び制御器６には目標水分設定器８から注
水比率設定器７を会して夫々目標水分値、例えば制御器
６へは最終目標水分値、制御器５へは最終目標水分より
僅かに少ない水分値に関する信号が入力されるようにな
っており、制御器５ば重量計量計４．水分計変換部３０
ｂからの各入力信号及び上記目標水分値の信号より第１
造粒ミキサー１０での注水量を次に説明する水分制御内
容に基づいて算出し、算出信号を水流量調節器１３へ出
力する。The controllers 5 and 6 are connected to a target moisture setting device 8 to a water injection ratio setting device 7, respectively, to output a target moisture value, for example, a final target moisture value to the controller 6, and a final target moisture value to the controller 5. A signal regarding a slightly low moisture value is inputted to the controller 5 and the weighing scale 4. Moisture meter conversion section 30
From each input signal from b and the target moisture value signal, the first
The amount of water injected into the granulation mixer 10 is calculated based on the content of water control described below, and a calculated signal is output to the water flow rate regulator 13.
一方、制御器６はＭ量計量計４．水分計変換部３０ｂ、
３１ｂ及び４２ｂからの各入力信号及び注水比率設定器
７からの目標水分値の信号より第２造粒ミキサー２０で
の注水量を、次に説明する水分制御内容に基づいて算出
し、算出信号を水流量調節器２３へ出力する。On the other hand, the controller 6 controls the M quantity meter 4. Moisture meter conversion section 30b,
From each input signal from 31b and 42b and the target water value signal from the water injection ratio setting device 7, the water injection amount in the second granulation mixer 20 is calculated based on the water content control details described below, and the calculated signal is Output to the water flow rate regulator 23.
水流量調節器１．３．２３夫には入力信号及び流量計１
２、２２からの水流量に関するフィードバック信号に基
づいてバルブ１１．２１の開度を制御する。Water flow regulator 1.3.23 input signal and flow meter 1
The opening degree of the valve 11.21 is controlled based on the feedback signal regarding the water flow rate from 2 and 22.
このように構成された焼結設備、即ち混合造粒設備及び
焼結機における水分制御内容につき説明する。The content of moisture control in the sintering equipment configured as described above, ie, the mixing granulation equipment and the sintering machine, will be explained.
重量計量計４にてヘルドコンヘア３上を所定速度で移送
されている焼結原料の積載輸送量（Ｗ、ｔ／ｈ）が測定
される。また第１造粒ミキサー１０にて注水された焼結
原料中の水分ｍ１が赤外線水分計３０ａにより測定され
る。A weighing scale 4 measures the loaded transport amount (W, t/h) of the sintering raw material being transported at a predetermined speed on the held container 3. Further, the moisture m1 in the sintering raw material injected with water in the first granulation mixer 10 is measured by an infrared moisture meter 30a.
さて、このときＷ、ｍｌ、流量計１２の測定値ｆ１及び
目標水分値Ｍ１とするに必要な注水ｆｆ１Ｆ＋は次の＋
１１式により求められる。Now, at this time, the water injection ff1F+ necessary to set W, ml, the measured value f1 of the flow meter 12, and the target moisture value M1 is as follows +
It is determined by Equation 11.
ｐ、、に、 ｉ、±（１−に＋） ・Ｗ（Ｋ２・（Ｍ
＋−Ｉｌｌｏ）＋（１−に：り ・（Ｍｌ−ｍｌ） １
・・・ （１）
但し、ｍｏ ：注水される前の焼結原料中に含有する水
分
に、、に２ ：定数
この（１＋式を制御器５へ予め設定しておく、水分計変
換部３０ｂ等からのｒＪ 、Ｗ、、ｒ、 １Ｍ、信号が
入力されると制御器５はＦ、を算出する。そして制御器
５はこの水流量に関する信号を水流量調節器１３へ出力
して第１造粒ミキサー１０の注水量をフィードハック制
御する。p, , i, ±(+ to 1-) ・W(K2・(M
+-Illo)+(1-ni:ri ・(Ml-ml) 1
... (1) However, mo: Moisture contained in the sintered raw material before water is injected, 2: Constant This (1+ formula is set in advance to the controller 5, the moisture meter converter 30b When signals rJ, W,, r, 1M, etc. are inputted, the controller 5 calculates F. Then, the controller 5 outputs a signal related to the water flow rate to the water flow rate regulator 13 and The amount of water injected into the granulation mixer 10 is controlled by feed hack.
ナオＷ 、 ｍ Ｏはベルトコンベアの速度によりトラ
ッキングしておき、第１造粒ミキサー通過時のタイミン
グに合わせた値により計算する。NaO W and mO are tracked based on the speed of the belt conveyor, and calculated using values that match the timing when passing through the first granulation mixer.
またｍ。の値が予め決められない場合はに２をゼロとし
てもよい。Also m. If the value of is not determined in advance, 2 may be set to zero.
一方、制御器６には第２造粒ミキサー２０での注水ＩＦ
２に関する下記（２）式が予め設定されており、Ｆ２−
に３・ｆ２±（１−に３） ・Ｗ（Ｌ値Ｍ２−ｍｌ ）
＋ （１−に４）値Ｍ２−１１１２） ）・・・ （
２）
但し、Ｋ３．に、：定数
ｍ２ ：赤外線水分計３１ｂの水分測定値ｆ２ ：流量
計２２の測定値
水分計変換部３０ｂ、３１ｂ等からの信号ｍｌ 、 ｍ
２ 。On the other hand, the controller 6 has a water injection IF in the second granulation mixer 20.
The following equation (2) regarding 2 is set in advance, and F2-
3・f2±(1-3) ・W (L value M2-ml)
+ (1- to 4) value M2-1112) )... (
2) However, K3. : Constant m2 : Moisture measurement value of the infrared moisture meter 31b f2 : Measurement value of the flow meter 22 Signals from the moisture meter converters 30b, 31b, etc. ml, m
2.
ｗ、Ｆ２及び最終目標水分値Ｍ２よりＦ２を求める。な
お（２）式においてＷ及び注水量Ｆ２は第２造粒ミキサ
ー通過時のタイミングに合わせてトラッキングした値で
ある。F2 is determined from w, F2, and the final target moisture value M2. In equation (2), W and the water injection amount F2 are values tracked in accordance with the timing when passing through the second granulation mixer.
そして制御器６はこの注水量Ｆ２に関する信号を水流量
調節器２３へ出力し、赤外線水分計３０ａからの信号ｍ
１成分に基づき第２造粒ミキサー２０の注水量をフィー
ドフォワード制御し、また赤外線水分計３１ａからの信
号ｍ２成分に基づきフィードバンク制御する。Then, the controller 6 outputs a signal regarding this water injection amount F2 to the water flow rate regulator 23, and outputs a signal m from the infrared moisture meter 30a.
The amount of water injected into the second granulation mixer 20 is feedforward controlled based on one component, and feedbank control is performed based on the signal m2 component from the infrared moisture meter 31a.
これにより水分が最終目標水分値となった焼結原料は焼
結機４０にて焼成されて品質の安定した焼結鉱となる。As a result, the sintered raw material whose moisture content has reached the final target moisture value is fired in the sintering machine 40 to become sintered ore with stable quality.
なお、上記説明では赤外線水分計３０ａによる水分測定
値に基づいて第１造粒ミキサーでの注水量をフィードバ
ック制御しているが、本発明はこの場合に限らず第１造
粒ミキサーでの注水量が一定である場合であっても実施
できる。In the above explanation, the amount of water injected in the first granulation mixer is feedback-controlled based on the moisture value measured by the infrared moisture meter 30a, but the present invention is not limited to this case. It can be carried out even when the is constant.
また、本発明は第１．第２造粒ミキサーにて注水する場
合に限らず、一方の造粒ミキサーにて注水する場合にあ
っても実施できる。この場合は該当造粒ミキサーの上流
側に設けた赤外線水分計での測定値に基づいてフィード
フォワード制御を行い、また該当造粒ミキサーの下流側
に設けた赤外線水分計での測定値に基づいてフィートバ
ック制御を行うことにより焼結原料中の水分を目標値に
調整できる。Moreover, the present invention has a first aspect. This can be carried out not only when water is poured into the second granulation mixer, but also when water is poured into one of the granulation mixers. In this case, feedforward control is performed based on the measurement value of an infrared moisture meter installed upstream of the relevant granulation mixer, and feedforward control is performed based on the measurement value of an infrared moisture meter installed downstream of the relevant granulation mixer. By performing feedback control, the moisture content in the sintering raw material can be adjusted to the target value.
以上詳述した如く本発明は最終目標水分にすべく注水す
る造粒ミキサーの上、下流側夫々に設けた赤外線水分計
の測定値夫々に基づいてフィードフォワード制御及びフ
ィードバック制御を行うので、従来の中性子水分計のみ
による制御の場合に生じていた制御遅れを解消でき、ま
た従来の赤外線水分計１個のみによる制御の場合の原料
配合変更による色３粒度の変化、測定距離変動及び茄発
等による水損失等に基づき生じていた制御不良を改善で
き、上記の下流側に設けた赤外線水分計での測定値に基
づくフィードバック制御により水分制御が可能であり、
従って精度よく焼結原料中の水分を目標値に制御でき、
品質の安定した焼結鉱の製造が可能となる等優れた効果
を奏する。As described in detail above, the present invention performs feedforward control and feedback control based on the measured values of infrared moisture meters installed above and downstream of the granulation mixer that injects water to achieve the final target moisture content. It eliminates the control delay that occurs when controlling only with a neutron moisture meter, and also eliminates the problems caused by changes in color 3 particle size due to changes in raw material composition, fluctuations in measurement distance, boiling, etc. when controlling with only a single infrared moisture meter. It is possible to improve control defects caused by water loss, etc., and moisture control is possible through feedback control based on the measured value of the infrared moisture meter installed on the downstream side.
Therefore, the moisture content in the sintered raw material can be precisely controlled to the target value.
It has excellent effects such as making it possible to produce sintered ore with stable quality.
また本発明による場合は、上流側又は下流側の赤外線水
分計のどちらか一方が故障したときでも直ちに一方の赤
外線水分計による注水制御が可能である利点を有してい
る。Furthermore, the present invention has the advantage that even if either the upstream or downstream infrared moisture meter breaks down, water injection can be immediately controlled by one of the infrared moisture meters.
第１図は本発明の実施状態を示す模式図、第２図、第３
図は従来技術の説明図である。Fig. 1 is a schematic diagram showing the implementation state of the present invention, Fig. 2, Fig. 3
The figure is an explanatory diagram of the prior art.
Claims (1)
を目標水分に制御する方法において、焼結原料の水分を
最終目標水分にすべく注水する造粒ミキサーの上流側及
び下流側に赤外線水分計を配してこれらにて水分を測定
し、上流側の赤外線水分計の測定値に基づいて造粒ミキ
サーでの注水量をフィードフォワード制御し、 また下流側の赤外線水分計の測定値に基づいて造粒ミキ
サーでの注水量をフィードバック制御することを特徴と
する焼結原料の水分制御方法。[Claims] 1. A granulation mixer that injects water to bring the moisture content of the sintering raw material to the final target moisture content in a method for controlling the moisture content of the sintering raw material to the target moisture content in a sintering equipment equipped with a granulation mixer. Infrared moisture meters are placed on the upstream and downstream sides of the granulation mixer to measure the moisture content, and the amount of water injected into the granulation mixer is feedforward controlled based on the measured value of the upstream infrared moisture meters. A method for controlling the moisture content of a sintered raw material, characterized in that the amount of water injected into a granulation mixer is feedback-controlled based on the measured value of an infrared moisture meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19818285A JPS6256535A (en) | 1985-09-06 | 1985-09-06 | Method for controlling moisture in sintering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19818285A JPS6256535A (en) | 1985-09-06 | 1985-09-06 | Method for controlling moisture in sintering machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6256535A true JPS6256535A (en) | 1987-03-12 |
| JPH052731B2 JPH052731B2 (en) | 1993-01-13 |
Family
ID=16386841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19818285A Granted JPS6256535A (en) | 1985-09-06 | 1985-09-06 | Method for controlling moisture in sintering machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6256535A (en) |
-
1985
- 1985-09-06 JP JP19818285A patent/JPS6256535A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH052731B2 (en) | 1993-01-13 |
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