JP3436841B2

JP3436841B2 - Temperature control device for continuous heating furnace

Info

Publication number: JP3436841B2
Application number: JP08032996A
Authority: JP
Inventors: 義朗関; 連久江; 口直樹山; 智敏貞武; 田邦雄吉; 田一郎前; 石英之大
Original assignee: JFE Steel Corp; Toshiba Corp
Current assignee: JFE Steel Corp; Toshiba Corp
Priority date: 1996-04-02
Filing date: 1996-04-02
Publication date: 2003-08-18
Anticipated expiration: 2016-04-02
Also published as: JPH09268328A

Description

Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】この発明は、スラブを連続的
に加熱する多帯式連続加熱炉の炉温を設定することによ
りスラブの温度を制御する連続加熱炉の温度制御装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control device for a continuous heating furnace that controls the temperature of the slab by setting the furnace temperature of a multi-zone continuous heating furnace that continuously heats the slab.

【０００２】[0002]

【従来の技術】多帯式連続加熱炉は通常３０ｍ〜６０ｍ
の長さを持ち、複数個の炉帯に分けられている。各帯に
は燃料と空気とを供給するバーナーが設けられており、
燃料流量を調整することによって炉帯の温度を他帯から
ほぼ独立に制御することが可能になっている。加熱炉温
度制御の目的は以下のようである。（１）スラブ抽出時の温度（平均、均熱、スキッド、表
面等）を目標温度まで加熱すること。（２）スラブの昇温を目標昇温パターン通りに行なわせ
ること。（３）燃料流量を最小にすること。2. Description of the Related Art A multi-zone type continuous heating furnace is usually 30 m to 60 m
It has the length of and is divided into several furnace zones. Each zone is equipped with a burner that supplies fuel and air,
By adjusting the fuel flow rate, the temperature of the furnace zone can be controlled almost independently of other zones. The purpose of heating furnace temperature control is as follows. (1) To heat the slab extraction temperature (average, soaking, skid, surface, etc.) to the target temperature. (2) To raise the temperature of the slab according to the target temperature rise pattern. (3) Minimize the fuel flow rate.

【０００３】上記、（１）項及び（２）項はスラブを目
標抽出温度まで目標昇温パターン通りに加熱することに
より、高品質の圧延、製品品質の安定化を実現させる。
また（３）項は加熱に必要な燃料を最小にすることによ
り省エネルギーに寄与し、経済的な操業を実現させる。
従来は（１）項及び（３）項を重視してきたが、近年の
製品品質、特に機械的性質（抗張力、延伸性等）のスラ
ブ内及びスラブ間均一性に対する要求が厳しくなってお
り、スラブ毎の目標昇温パターン通りにスラブを加熱す
ることが要求されるようになってきた。In the above items (1) and (2), the slab is heated to the target extraction temperature in accordance with the target temperature rising pattern to achieve high quality rolling and product quality stabilization.
Further, the item (3) contributes to energy saving by minimizing the fuel required for heating and realizes economical operation.
Conventionally, the items (1) and (3) have been emphasized, but in recent years, the demands on the product quality, especially the uniformity of mechanical properties (tensile strength, stretchability, etc.) within and between slabs have become strict. It has become necessary to heat the slab according to the target heating pattern for each.

【０００４】従来技術として例えば特開平２−１５６０
１７号公報に開示されたものがある。これは各スラブに
目標昇温パターンを設定し、近接する類似のスラブを一
まとまりとして各グループ内で目標昇温パターンの共通
パラメータ（例：各帯スラブ昇温速度）の値を非線形計
画法により求め、予定変更（目標温度、抽出ピッチ）が
あっても目標昇温パターンの変更は行わないものであ
る。また、特公昭６０−２３６５号公報に開示されたも
のは、目標昇温パターンをスラブ装入後の経過時間と予
定在炉時間との比（無次元化時間）で表し、予定変更が
あった場合でも昇温パターンの変更は行わないものであ
る。As a conventional technique, for example, Japanese Patent Application Laid-Open No. 2-1560.
There is one disclosed in Japanese Patent No. This sets a target heating pattern for each slab, and sets similar common slabs as a group to determine the value of the common parameter (eg, each band slab heating rate) of the target heating pattern in each group by nonlinear programming. Even if there is a change in the schedule (target temperature, extraction pitch), the target heating pattern is not changed. Further, the one disclosed in Japanese Examined Patent Publication No. 60-2365 shows a target temperature rise pattern as a ratio of the elapsed time after slab charging to the planned in-reactor time (dimensionless time), and the schedule is changed. Even in this case, the temperature rise pattern is not changed.

【０００５】[0005]

【発明が解決しようとする課題】上記従来の制御方法で
は、（ａ）近接するスラブとの加熱評価項目値の制約条件や
加熱負荷が違う場合にグループ分けが上手く出来ず、厳
しい制約のスラブや大きな加熱負荷のスラブを要求され
る品質（抽出時平均温度、均熱度、スキッドマーク量、
表面温度）に加熱することが出来ない。（ｂ）加熱途中で予定変更があった場合に目標昇温パタ
ーンを時間軸方向に移動させるだけでは加熱評価項目値
が制約範囲内に入るとの保証がなく、制約範囲外となる
危険性がある。In the above-mentioned conventional control method, (a) when the heating evaluation item value constraint condition and the heating load with the adjacent slab are different, the grouping cannot be performed well, and the slab with the severe constraint or Quality required for slabs with large heating load (average temperature during extraction, soaking degree, skid mark amount,
It cannot be heated to the surface temperature). (B) If the target temperature rise pattern is moved in the time axis direction when the schedule is changed during heating, there is no guarantee that the heating evaluation item value will fall within the constraint range, and it will be outside the constraint range. There is a risk of becoming.

【０００６】本発明は上記問題点を解決するためになさ
れたもので、その目的は帯に存在するスラブに共通の炉
温を設定すること、及び共通炉温が存在しない場合に抽
出スケジュールを修正することにより全てのスラブを、
要求される加熱制約を満たすように加熱することが可能
で、予定変更があっても加熱評価項目値を上下限制約範
囲内に収めることを可能にする多帯式連続加熱炉の温度
制御装置を提供するにある。The present invention has been made to solve the above problems, and its purpose is to set a common furnace temperature for the slabs existing in the strip, and to correct the extraction schedule when the common furnace temperature does not exist. By doing all the slabs,
A temperature control device for a multi-zone continuous heating furnace that can heat to meet the required heating constraints and that can keep heating evaluation item values within the upper and lower limit constraints even if the schedule is changed. To provide.

【０００７】[0007]

【課題を解決するための手段】スラブを連続的に加熱す
る多帯式加熱炉の炉温を制御する炉温制御装置を有する
連続加熱炉において請求項１に記載の温度制御装置は、
抽出時平均スラブ温度、均熱度、スキッドマーク量等加
熱評価項目値の上下限値、鋼種、寸法及びスラブの抽出
スケジュールを入力し、スラブ毎の燃料流量が最小とな
る最適目標昇温パターン及びこのパターンに対応する各
帯の炉温を計算するスラブ毎目標昇温パターン計算手段
と、前記最適目標昇温パターンに対応する各帯の炉温を
基準として炉温の微小変化に対する加熱評価項目値への
影響係数、及び抽出スケジュールから計算した各帯在帯
時間を基準として各帯在帯時間の変化に対する加熱評価
項目値への影響係数を計算する影響係数計算手段と、前
記各影響係数に基づいてスラブが装入された時点以降の
任意の時刻における該当スラブの近隣スラブとの関係で
決まる各帯の共通炉温を計算する共通炉温計算手段と、
共通炉温が存在しない場合に加熱評価項目値を上下限範
囲内に入れるために抽出スケジュールを修正する抽出ス
ケジュール修正手段と、計算された前記共通炉温及び修
正された前記抽出スケジュールに基づき目標昇温パター
ンを計算する目標昇温パターン計算手段と、スラブの炉
内位置、厚み、幅、長さ、鋼種、装入温度、前回計算時
刻における実績温度等のスラブ情報及び現在炉温を入力
し、スラブ毎に実績温度を計算する実績処理手段と、前
記目標昇温パターン、前記修正された抽出スケジュール
及び前記スラブ毎の実績温度を入力し炉温設定値を計算
し、前記炉温制御装置に入力する設定炉温計算手段と、
を備えたことを特徴としている。In a continuous heating furnace having a furnace temperature control device for controlling the furnace temperature of a multi-zone heating furnace for continuously heating a slab, the temperature control device according to claim 1 is provided.
Extraction time average slab temperature, Hitoshinetsudo, upper and lower limits of the skid mark amount such heating evaluation item value, steels, and enter the size and slab extraction schedule, the optimum target Atsushi Nobori pattern fuel flow for each slab is minimized and this Target heating pattern calculation means for each slab that calculates the furnace temperature of each zone corresponding to the pattern, and heating evaluation item values for small changes in the furnace temperature based on the furnace temperature of each zone corresponding to the optimum target heating pattern Influence coefficient, and the influence coefficient calculation means for calculating the influence coefficient to the heating evaluation item value for each change in the resident zone time calculated from each zonal zone time calculated from the extraction schedule, and based on each of the impact coefficients a common furnace temperature calculating means for calculating a common furnace temperature of each band that Kima <br/> in relation to the neighboring slabs corresponding slab at any time after the time the slab is charged,
When the common furnace temperature does not exist, the extraction schedule modification means for modifying the extraction schedule so that the heating evaluation item value falls within the upper and lower limit range, and the target increase based on the calculated common furnace temperature and the modified extraction schedule. Target temperature rising pattern calculation means for calculating the temperature pattern, the furnace position of the slab, thickness, width, length, steel type, charging temperature, slab information such as the actual temperature at the previous calculation time and the current furnace temperature, and actual processing means for calculating the actual temperature for each slab, the target Atsushi Nobori pattern, calculates the corrected extracted schedule and entered furnace temperature setpoint actual temperature of said each slab, the input to the furnace temperature control device a setting furnace temperature calculating means for,
It is characterized by having.

【０００８】請求項２に記載の温度制御装置は、抽出時
平均スラブ温度、均熱度、スキッドマーク量等加熱評価
項目値の上下限値、鋼種、寸法及びスラブの抽出スケジ
ュールを入力し、スラブ毎の燃料流量が最小となる最適
目標昇温パターン及びこのパターンに対応する各帯の炉
温を計算するスラブ毎目標昇温パターン計算手段と、前
記最適目標昇温パターンに対応する各帯の炉温に基づい
てスラブが装入された時点以降の任意の時刻における該
当スラブの近隣スラブとの関係で決まる各帯の共通炉温
を予測計算して仮決定すると共に、該当スラブと近隣ス
ラブの加熱評価項目値を用いて共通炉温を決定する共通
炉温計算手段と、前記共通炉温計算手段によって仮決定
された共通炉温を入力し、前記抽出スケジュールに従っ
て該当スラブと近隣スラブの抽出までの温度を予測し、
加熱評価項目値を前記共通炉温計算手段に入力する焼き
上げ予測手段と、共通炉温が存在しない場合に加熱評価
項目値を上下限範囲内に入れるために抽出スケジュール
を修正する抽出スケジュール修正手段と、決定された前
記共通炉温及び修正された前記抽出スケジュールに基づ
き目標昇温パターンを計算する目標昇温パターン計算手
段と、スラブの炉内位置、厚み、幅、長さ、鋼種、装入
温度、前回計算時刻における実績温度等のスラブ情報及
び現在炉温を入力し、スラブ毎に実績温度を計算する実
績処理手段と、前記目標昇温パターン、前記修正された
抽出スケジュール及び前記スラブ毎の実績温度を入力し
炉温設定値を計算し、前記炉温制御装置に入力する設定
炉温計算手段と、を備えたことを特徴としている。In the temperature control device according to the second aspect, the upper and lower limit values of heating evaluation item values such as average slab temperature during extraction, soaking degree, skid mark amount, steel type, size and slab extraction schedule are input, and each slab is input. Target heating pattern for calculating the optimum target temperature rise pattern that minimizes the fuel flow rate and the furnace temperature of each zone corresponding to this pattern, and the furnace temperature of each zone corresponding to the optimum target temperature rise pattern with slab is predictive calculation to provisionally determine a common furnace temperature of each band determined by the relationship with the neighboring slab of the corresponding slab at any time after the time of the charged based on, the corresponding slabs and neighboring slabs pressurized heat The common furnace temperature calculation means for determining the common furnace temperature using the evaluation item value, and the common furnace temperature provisionally determined by the common furnace temperature calculation means are input, and the slabs close to the relevant slab according to the extraction schedule are input. To predict the temperature of up to extraction of the slab,
A heating prediction means for inputting the heating evaluation item value to the common furnace temperature calculating means, and a modification of the extraction schedule so that the heating evaluation item value falls within the upper and lower limit range when the common furnace temperature does not exist. Extraction schedule correction means, target temperature rise pattern calculation means for calculating a target temperature rise pattern based on the determined common furnace temperature and the corrected extraction schedule, in-furnace position of slab, thickness, width, length, Steel type, charging temperature, slab information such as the actual temperature at the previous calculation time and the current furnace temperature are input, and actual result processing means for calculating the actual temperature for each slab, the target heating pattern, the modified extraction schedule, and And a set furnace temperature calculation means for inputting the actual temperature of each slab to calculate the furnace temperature set value and inputting the set value to the furnace temperature control device.

【０００９】請求項３に記載の温度制御装置は、スラブ
の炉内位置、厚み、幅、長さ、鋼種、装入温度等のスラ
ブ情報及びスラブの抽出スケジュールを入力する一方、
予め設定若しくは入力された初期炉温又は初期炉温から
任意帯炉温を所定の量だけ変化させた炉温及び前記抽出
スケジュールを焼き上げ予測手段に出力し、その出力に
対応して前記焼き上げ予測手段から入力される加熱評価
項目値と前記スラブ情報とに基づき、炉温の微小変化に
対する加熱評価項目値への影響係数、及び各帯在帯時間
の変化に対する加熱評価項目値への影響係数を計算する
影響係数計算手段と、前記影響係数計算手段から出力さ
れた初期炉温又は初期炉温から任意帯炉温を所定の量だ
け変化させた炉温及び前記抽出スケジュールに基づいて
該当スラブと近隣スラブの抽出までの温度を予測し、加
熱評価項目値を出力して前記影響係数計算手段に与える
焼き上げ予測手段と、計算された前記各影響係数と加熱
評価項目値とを入力してスラブ毎の目標昇温パターンの
任意の時刻における該当スラブの近隣スラブとの関係で
決まる各帯の共通炉温を計算する共通炉温計算手段と、
共通炉温が存在しない場合に加熱評価項目値を上下限範
囲内に入れるために抽出スケジュールを修正する抽出ス
ケジュール修正手段と、前記共通炉温及び修正された前
記抽出スケジュールに基づき目標昇温パターンを計算す
る目標昇温パターン計算手段と、スラブの炉内位置、厚
み、幅、長さ、鋼種、装入温度、前回計算時刻における
実績温度等のスラブ情報及び現在炉温を入力し、スラブ
毎に実績温度を計算する実績処理手段と、前記目標昇温
パターン、前記修正された抽出スケジュール及び前記ス
ラブ毎の実績温度を入力し炉温設定値を計算し、前記炉
温制御装置に入力する設定炉温計算手段と、を備えたこ
とを特徴としている。In the temperature control device according to the third aspect of the present invention, the slab in-furnace position, thickness, width, length, steel type, charging temperature and other slab information and the slab extraction schedule are input.
Outputs any zone furnace temperature from a preset or input initial furnace temperature, or the initial furnace temperature to a predetermined amount only altered so the furnace temperature and predicting means baking the extraction schedule predicting means baking said in response to the output wherein based on the slab information, influence coefficients, and each band resident band time to the heating evaluation item value for small changes in furnace temperature and pressure heat evaluation item values are entered from
And influence coefficient calculating means for calculating an influence coefficient of the heating evaluation item value for changes in, was any band furnace temperature is varied by a predetermined amount from the initial furnace temperature, or the initial furnace temperature is output from the influence coefficient calculating means Predict the temperature until the extraction of the relevant slab and neighboring slabs based on the furnace temperature and the extraction schedule, and output a heating evaluation item value to the influence coefficient calculation means and a baking prediction means, and each calculated influence coefficient. enter the heating evaluation item value as a common furnace temperature calculation for calculating a common furnace temperature of each band that Kima <br/> in relation to the neighboring slabs corresponding slab at any time in target Atsushi Nobori pattern for each slab Means and
When the common furnace temperature does not exist, the extraction schedule correction means for correcting the extraction schedule in order to put the heating evaluation item value within the upper and lower limit range, and the target heating pattern based on the common furnace temperature and the corrected extraction schedule. For each slab, enter the target heating pattern calculation means to calculate, the slab in-furnace position, thickness, width, length, steel type, charging temperature, slab information such as the actual temperature at the last calculation time, and the current furnace temperature. Actual processing means for calculating the actual temperature, the target heating pattern, the corrected extraction schedule and the actual temperature for each slab are input to calculate the furnace temperature set value, and the set furnace is input to the furnace temperature control device. And a temperature calculating means.

【００１０】請求項４に記載の温度制御装置は、抽出時
平均スラブ温度、均熱度、スキッドマーク量等加熱評価
項目値の上下限値、鋼種、寸法及びスラブの抽出スケジ
ュールを入力し、スラブ毎の燃料流量が最小となる最適
目標昇温パターン及びこのパターンに対応する各帯の炉
温を計算するスラブ毎目標昇温パターン計算手段と、加
熱評価項目値を入力し各帯炉温を出力するニューラルネ
ットワークにより予めスラブ毎に各帯炉温変化許容範囲
を求めるスラブ毎炉温許容範囲計算手段と、前記各帯炉
温変化許容範囲に基づいてスラブが装入された時点以降
の任意の時刻における該当スラブの近隣スラブとの関係
で決まる各帯の共通炉温を計算する共通炉温計算手段
と、共通炉温が存在しない場合に加熱評価項目値を上下
限範囲内に入れるために抽出スケジュールを修正する抽
出スケジュール修正手段と、計算された前記共通炉温及
び修正された前記抽出スケジュールに基づき目標昇温パ
ターンを計算する目標昇温パターン計算手段と、スラブ
の炉内位置、厚み、幅、長さ、鋼種、装入温度、前回計
算時刻における実績温度等のスラブ情報及び現在炉温を
入力し、スラブ毎に実績温度を計算する実績処理手段
と、前記目標昇温パターン、前記修正された抽出スケジ
ュール及び前記スラブ毎の実績温度を入力し炉温設定値
を計算し、前記炉温制御装置に入力する設定炉温計算手
段と、を備えたことを特徴としている。The temperature control device according to claim 4 inputs the upper and lower limits of heating evaluation item values such as average slab temperature during extraction, soaking degree, and skid mark amount, steel grade, size, and slab extraction schedule, and each slab slab each target Atsushi Nobori pattern calculation means fuel flow to calculate the furnace temperature of each band corresponding to the optimum target Atsushi Nobori pattern and this pattern becomes minimum, pressurized
A neural network that inputs thermal evaluation item values and outputs each zone furnace temperature
Slab furnace temperature allowable range calculation means for obtaining each zone furnace temperature allowable change range for each slab in advance by a work, and corresponding at any time after the time when the slab is charged based on each zone furnace temperature change allowable range a common furnace temperature calculating means for calculating a common furnace temperature of each band that KOR in relation to the neighboring slabs of the slab, the extraction schedule to take into the upper and lower limit range of heating evaluation item value when the common furnace temperature does not exist Extraction schedule correction means for correction, target temperature rise pattern calculation means for calculating a target temperature rise pattern based on the calculated common furnace temperature and the corrected extraction schedule, in-furnace position, thickness, width, length of the slab The slab information such as the steel type, the charging temperature, the actual temperature at the previous calculation time, and the current furnace temperature are input, and the actual temperature processing means for calculating the actual temperature for each slab, and the target temperature increase pattern. Down, the modified extracted schedule and entered furnace temperature setpoint actual temperature of said each slab calculated, is characterized by comprising a, a setting furnace temperature calculating means to be input to the furnace temperature control device.

【００１１】請求項５に記載の温度制御装置は、さら
に、炉温、在帯時間変化に対する加熱評価項目値変化
を、影響係数を用いて、一定周期毎に予測計算し、その
値が許容範囲を外れた場合に共通炉温及び修正抽出ピッ
チを計算する手段を起動させる監視手段を備えたことを
特徴としている。The temperature control device according to the fifth aspect of the invention further predicts and calculates the change in the heating evaluation item value with respect to the change in the furnace temperature and the in-zone time at every constant cycle using the influence coefficient, and the value is within the allowable range. It is characterized in that it is provided with a monitoring means for activating means for calculating the common furnace temperature and the corrected extraction pitch when the temperature is out of the range.

【００１２】[0012]

【発明の実施の形態】以下、本発明の原理と併せてその
実施形態を以下に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below together with the principle of the present invention.

【００１３】多帯式連続加熱炉の各帯の炉温を変化させ
たときの加熱評価項目値の変化の影響係数は（１）式で
表される。The influence coefficient of the change of the heating evaluation item value when the furnace temperature of each zone of the multi-zone continuous heating furnace is changed is expressed by the equation (1).

【００１４】[0014]

【数１】ただし、 ΔＸ_outi ：加熱評価項目値の変化分ｋ_T,X,i,j：ｉスラブの帯炉温変化によるＸ評価項目値の影響係数 ΔＴ：炉温の変化分ｉ：スラブ番号ｊ：帯番号を表す。[Equation 1] However, [Delta] X _outi: variation k T of the pressurized heat evaluation item _{value, X, i, j:} influence coefficient of X evaluation item value by strip furnace temperature change of i Slab [Delta] T: furnace temperature of variation i: Slab Number j: Shows the band number.

【００１５】各帯の在帯時間を変化させたときの加熱評
価項目値の変化の影響係数は（２）式で表される。The influence coefficient of the change of the heating evaluation item value when the in-zone time of each zone is changed is expressed by equation (2).

【００１６】[0016]

【数２】ただし、 ΔＸ_out,i ：加熱評価項目値の変化分ｋ_Y,X,i,j：ｉスラブの帯在帯時間変化によるＸ評価項目の影響係数 Δτ ：在帯時間の変化分ｉ：スラブ番号ｊ：帯番号を表す。[Equation 2] _However, ΔX _{out, i:} variation k Y pressurized heat evaluation item _{value, X, i, j: i} influence coefficients of X endpoints by bands resident band time variation of the slab .DELTA..tau: standing strip time variation i: Slab Number j: represents a band number.

【００１７】また、加熱評価項目値Ｘ_out,iは次の
（３），（４），（５）式で表される。 Further, pressurized thermal evaluation item value X _{out, i} is the following (3), (4), it is expressed by equation (5).

【００１８】[0018]

【数３】ただし、Ｘ_0,out,i：スラブ毎の最適な目標昇温パターン計算に
よって求めた加熱評価項目値基準点Ｔ_0,j：ｊ帯炉温基準点 τ_0,j：ｊ帯在帯時間基準点である。[Equation 3] _However, X 0, _{out, i:} optimum target evaluation pressurized heat was determined by heating the pattern calculated field value reference point of each slab T _{0, j: j} zone furnace temperature reference point τ _{0, j: j} Obizai zone time It is a reference point.

【００１９】各帯の炉温変化及び在帯時間変化と加熱評
価項目値変化は非線形関係にあるため、影響係数は基準
点からのズレの大きさに依存して変化する。Since the changes in the furnace temperature and the time in the zone and the changes in the heating evaluation item value in each zone have a non-linear relationship, the influence coefficient changes depending on the amount of deviation from the reference point.

【００２０】（３）式において加熱評価項目値は上下限
制約範囲内であれば変化を許容しているため、現在から
抽出までの未来時刻における該当スラブ存在帯において
他のスラブとの共通炉温がある可能性がある。[0020] (3) Since the pressurized heat evaluation item value each scent is allowed change if the upper and lower limit constraint range, common with other slabs in the corresponding slab presence band in the future time to extract from the current There may be furnace temperature .

【００２１】そこで、請求項１に記載の連続加熱炉の温
度制御装置においては、スラブ毎の各帯要求炉温許容範
囲計画値を元に同一帯在帯スラブに共通炉温があるかを
調べ、共通炉温がある場合はその範囲内において炉温基
準点との２乗偏差が最小となる炉温をその帯のその時刻
における炉温に決定する。若し、共通炉温が無い場合は
抽出スケジュールを修正する必要がある。すなわち、抽
出ピッチを延長する必要がある。抽出ピッチの延長にも
（３）式を用いる。抽出ピッチを変更することによって
未来時刻におけるある帯の共通炉温を求めることができ
る。Therefore, in the temperature control device for the continuous heating furnace according to the first aspect of the present invention, the zone required furnace temperature allowable range for each slab is set.
Whether there is a common furnace temperature in the same zonal slab based on the planned value
If there is a common furnace temperature , the furnace temperature that minimizes the squared deviation from the furnace temperature reference point within that range is determined as the furnace temperature at that time in that zone. If there is no common furnace temperature, it is necessary to modify the extraction schedule. That is, it is necessary to extend the extraction pitch. Equation (3) is also used to extend the extraction pitch. By changing the extraction pitch, it is possible to obtain the common furnace temperature of a certain band at the future time.

【００２２】ところで、請求項１に記載の連続加熱炉の
温度制御装置装置は、炉温あるいは在帯時間の変化に対
する加熱評価項目値の変化は線形関係にあると仮定して
計算される影響係数に基づいて共通炉温を求めている。
しかしながら、実際にはその変化は非線形であるため、
スラブ毎の目標昇温パターン計算結果から大幅にずれた
共通炉温とする場合には線形化の誤差が悪影響を及ぼし
制御性能を劣化させる虞れがある。By the way, the continuous heating furnace temperature controller apparatus according to claim 1, the change in furnace temperature or Zaiobi pressurized thermal evaluation item value you pair <br/> to changes in time to be in a linear relationship Assuming
The common furnace temperature is calculated based on the calculated influence coefficient .
However, in practice the change is non-linear, so
When the common furnace temperature is significantly deviated from the target heating pattern calculation result for each slab, the linearization error may adversely affect the control performance.

【００２３】そこで、請求項２に記載の連続加熱炉の温
度制御装置はこの問題を解決するもので、該当スラブの
近隣スラブとの関係で決まる各帯の共通炉温を予測計算
して仮決定し、この仮決定された共通炉温を用いて近隣
スラブの抽出までの焼き上げ温度を予測する操作を繰り
返すことにより、すなわち、試行錯誤的に炉温を求める
ことにより精度良く共通炉温を求めることを可能にして
いる。すなわち、該当スラブが現在時刻から抽出される
までの間、該当スラブ存在帯に存在する全てのスラブの
スラブ毎帯炉温を平均し、これを初期値として現在時刻
から該当スラブ抽出時刻まで該当スラブに影響を与える
全てのスラブの昇温計算をおこなう。この計算によつて
該当スラブに影響を与える全てのスラブの加熱評価項目
値が上下限許容範囲内であれば、共通炉温計算手段が平
均炉温を共通炉温とする。そして、許容範囲を外れてい
たら、許容範囲に戻す方向の炉温修正を行い、これを繰
り返すことにより共通炉温を決定し、その炉温をもとに
該当スラブの目標昇温パターンを求める。Therefore, the temperature control device for the continuous heating furnace according to claim 2 solves this problem .
Predictive calculation of common furnace temperature for each zone determined by the relationship with neighboring slabs
And make a tentative decision, and use this tentatively decided common furnace temperature to
Repeat the operation to predict the baking temperature until slab extraction.
By returning it, that is, by obtaining the furnace temperature by trial and error, the common furnace temperature can be accurately obtained. That is, until the relevant slab is extracted from the current time, the slab furnace temperature of all the slabs existing in the relevant slab existence zone is averaged, and this is the initial value, and the slab is extracted from the current time to the relevant slab extraction time. Calculate the temperature rise of all the slabs that affect the. By this calculation, the heating evaluation items of all the slabs that affect the relevant slab
If the value is within the upper and lower limit allowable range, the common furnace temperature calculation means sets the average furnace temperature as the common furnace temperature. If it is out of the allowable range, the furnace temperature is corrected in the direction of returning it to the allowable range, the common furnace temperature is determined by repeating this, and the target temperature rise pattern of the corresponding slab is obtained based on the furnace temperature.

【００２４】上述したように、請求項１および２に記載
の連続加熱炉の温度制御装置は、スラブ毎の目標昇温パ
ターン計算で得られた炉温を用いて共通炉温を計算して
いるため、スラブ毎の炉温が必要である。 As mentioned above, the method according to claims 1 and 2
The temperature controller for the continuous heating furnace of the
Calculate the common furnace temperature using the furnace temperature obtained from the turn calculation
Therefore, the furnace temperature for each slab is required.

【００２５】そこで、請求項３に記載の連続加熱炉の温
度制御装置においては、予め設定若しくは入力された初
期炉温又は初期炉温から任意帯炉温を所定の量だけ変化
させた炉温に対応して予測計算により求められる加熱評
価項目値に基づいて算出した影響係数を用いて共通炉温
を求めている。 Therefore, in the temperature control device for the continuous heating furnace according to claim 3, the first preset or input
Change the desired zone furnace temperature by a predetermined amount from the initial furnace temperature or the initial furnace temperature
Heating rating obtained by predictive calculation corresponding to the furnace temperature
The common reactor temperature is calculated using the influence coefficient calculated based on the price item value.
Are seeking.

【００２６】一方、請求項１乃至３に記載の連続加熱炉
の温度制御装置では、いずれも、影響係数を計算するの
にオンラインでスラブ昇温計算を行ったり、複数スラブ
の制約条件を考慮して例えば線形計画法により目標昇温
パターンを求めているが、計算時間を飛躍的に向上させ
ることは困難である。On the other hand, in any of the temperature control devices for continuous heating furnaces according to claims 1 to 3, slab temperature rise calculation is performed online to calculate the influence coefficient, and constraint conditions for a plurality of slabs are taken into consideration. For example, the target heating pattern is obtained by, for example, a linear programming method, but it is difficult to dramatically improve the calculation time.

【００２７】そこで、請求項４に記載の連続加熱炉の温
度制御装置においては、予めオンラインで代表的な操業
条件を用いて影響係数を計算し、その結果をニューラル
ネットワークに記憶させることにより、プロセスの逆モ
デルのニューラルネットワークを構築し、それを例えば
プロセス計算機等のオフライン計算用ハードウエアにイ
ンプリメントすることにより、オンラインでの共通炉温
計算時間を大幅に改善し、なおかつ非線形性にも対応可
能な、共通炉温と目標昇温パターンを求めている。Therefore, in the temperature control device for a continuous heating furnace according to claim 4, the influence coefficient is calculated in advance using typical operating conditions online, and the result is stored in the neural network, thereby of building the neural network of the inverse model by implementing it, for example, in off-line calculation hardware such process computer, greatly improved common furnace temperature calculation time online, yet also supports nonlinearity We are looking for possible common furnace temperatures and target heating patterns.

【００２８】請求項５に記載の連続加熱炉の温度制御装
置においては、炉温、在帯時間変化に対する加熱評価項
目値を、影響係数を用いて、一定周期毎に予測計算し、
その値が許容範囲を外れた場合には共通炉温及び抽出ピ
ッチ変更手段を起動させるようにして、常時安定して炉
温を操作するようにしている。In the temperature control device for a continuous heating furnace according to claim 5, the heating evaluation item values for the furnace temperature and the change over time in the zone are predicted and calculated using the influence coefficient at regular intervals.
When the value is out of the allowable range, the common furnace temperature and extraction pitch changing means are activated so that the furnace temperature can be operated constantly and constantly.

【００２９】図１は請求項１に記載の連続加熱炉の温度
制御装置に対応する実施形態の構成を示すブロック図で
ある。同図において、加熱炉本体１は複数個の炉帯に分
けられ、各炉帯にはそれぞれ燃料と空気とを供給するバ
ーナーと、温度計２とが設けられ、炉温制御装置３が、
各温度計２の計測値と炉温設定値との差を零に近付ける
ようにバーナーの開度を制御する。ここでは図面の簡単
化のために、バーナー及び温度計をそれぞれ１個づつ示
している。スラブ温度制御装置１０は炉温制御装置３に
加える炉温設定値を計算するものである。FIG. 1 is a block diagram showing the configuration of an embodiment corresponding to the temperature control device for a continuous heating furnace according to claim 1. In the figure, the heating furnace body 1 is divided into a plurality of furnace zones, each furnace zone is provided with a burner for supplying fuel and air, a thermometer 2, and a furnace temperature control device 3
The opening of the burner is controlled so that the difference between the measured value of each thermometer 2 and the set value of the furnace temperature approaches zero. Here, one burner and one thermometer are shown for simplification of the drawing. The slab temperature control device 10 calculates a furnace temperature set value applied to the furnace temperature control device 3.

【００３０】スラブ温度制御装置１０は、加熱評価項目
値の上下限値及びスラブ抽出スケジュール等を入力して
スラブ毎の燃料流量が最小となる最適目標昇温パターン
を計算するスラブ毎目標昇温パターン計算手段１１と、
温度変化から加熱評価項目値への影響係数、及び在帯時
間から加熱評価項目値への影響係数を計算する影響係数
計算手段１２と、これらの影響係数から該当スラブと近
隣スラブとの共通炉温を計算する共通炉温計算手段１３
と、共通炉温が存在しない場合に抽出スケジュールを変
更する抽出スケジュール修正手段１５と、共通炉温及び
抽出スケジュールに基づいて目標昇温パターンを計算す
る目標昇温パターン計算手段１４と、スラブ情報及び現
在炉温を入力し、スラブ毎に実績温度を計算する実績処
理手段１７と、上記抽出スケジュール、目標昇温パター
ン及び実績温度を入力して炉温設定値を計算する設定炉
温計算手段１６とで構成されている。The slab temperature control device 10 is a heating evaluation item.
The lower limit and the slab extracted slabs each target Atsushi Nobori pattern calculating means 11 by entering a schedule such as a fuel flow rate of each slab to calculate the optimal target Atsushi Nobori pattern having the minimum upper value,
Influence coefficient calculation means 12 for calculating the influence coefficient from the temperature change to the heating evaluation item value and the influence coefficient from the occupancy time to the heating evaluation item value, and the common furnace temperature of the relevant slab and the neighboring slab from these influence coefficients common furnace temperature calculating means for calculating the 13
An extraction schedule correction means 15 that changes the extraction schedule when the common furnace temperature does not exist; a target temperature rise pattern calculation means 14 that calculates a target temperature rise pattern based on the common furnace temperature and the extraction schedule; slab information; Actual processing means 17 for inputting the current furnace temperature and calculating the actual temperature for each slab, and set furnace temperature calculating means 16 for inputting the extraction schedule, the target heating pattern and the actual temperature and calculating the furnace temperature set value It is composed of.

【００３１】上記のように構成された本実施形態の動作
について以下に説明する。スラブ毎目標昇温パターン計
算手段１１はスラブ毎の加熱評価項目値の上下限値、鋼
種、寸法などを入力し、燃料流量が最小で加熱制約を満
たす各帯炉温及び最適スラブ毎目標昇温パターンを計算
する。The operation of this embodiment configured as described above will be described below. The target temperature rise pattern calculation means 11 for each slab inputs the upper and lower limits of the heating evaluation item value for each slab, steel grade, dimensions, etc., and each zone furnace temperature with the minimum fuel flow rate and satisfying the heating constraint and the optimum target temperature rise for each slab. Calculate the pattern.

【００３２】この計算には従来から線形計画法、非線形
計画法、テーブル索引法などが用いられている。線形計
画法を用いる場合には線形化による誤差のために収束で
きなくなる場合がある。本実施形態では各帯炉温が１回
の線形計画法を用いた計算で変化可能な範囲を指定し、
徐々に変化範囲を狭めることで、解が存在する問題での
収束を保証している。目的関数：制約条件： θ_m,out,L≦θ_m,out≦θ_m,out,u （７） Δθ_out≦θ_out,u （８） θ_sk ≦θ_sk,u （９） θ_s ≦θ_s,u （10） Fu_j,L ≦Fu_j≦Fu_j,u （11）Ｔ_j,L ≦Ｔ_j≦Ｔ_J,u （12）ただし、を表す。Conventionally, a linear programming method, a non-linear programming method, a table indexing method, etc. have been used for this calculation. When using linear programming, convergence may not be possible due to an error due to linearization. In this embodiment, the range in which each zone furnace temperature can be changed by one calculation using the linear programming is designated,
By gradually narrowing the range of change, we guarantee convergence in problems where solutions exist. Objective function: Constraints: θ _{m, out, L} ≦ θ _{m, out} ≦ θ _{m, out, u} (7) Δθ _out ≦ θ _{out, u} (8) θ _sk ≦ θ _{sk, u} (9) θ _s ≦ θ _{s, u} (10) Fu _{j, L} ≤Fu _j ≤Fu _{j, u} (11) T _{j, L} ≤T _j ≤T _{J, u} (12) Represents

【００３３】炉温上下限値は操業上の制約条件と探索範
囲とで厳しい方の値を設定する。加熱評価項目値を計算
する方法としては、例えば、前回計算時刻におけるスラ
ブ温度実績値をθ（χ，ｔ）（χはスラブ厚み方向にと
った距離）としたとき、これを初期値として（13）式に
示す周知の熱伝導方程式によってスラブ温度を演算す
る。このスラブ温度を基に抽出時平均温度、表面温度、
均熱度、スキッドマーク量等の加熱評価項目値を計算す
る。The upper and lower limits of the furnace temperature are set to the stricter ones depending on the operational constraints and the search range . As a method of calculating the pressurized heat evaluation item value, for example, a slab temperature actual value θ in the previous calculation time (chi, t) when (chi distance taken in the slab thickness direction) was set to, this as an initial value ( The slab temperature is calculated by the well-known heat conduction equation shown in Eq. (13). Based on this slab temperature, extraction average temperature, surface temperature,
Calculate heating evaluation item values such as soaking degree and skid mark amount.

【００３４】[0034]

【数４】境界条件は（14）式、（15）式で表される。[Equation 4] Boundary conditions are expressed by equations (14) and (15).

【００３５】[0035]

【数５】ただし、 σ ：はステファン・ボルツマン定数 φ_CG：総括熱吸収率Ｔ：炉温ｈ：スラブ厚である。[Equation 5] Here, σ: Stefan-Boltzmann constant φ _CG : Overall heat absorption rate T: Furnace temperature h: Slab thickness.

【００３６】ここで計算される目標昇温パターンは該当
スラブ１本のみを焼き上げるための最適な昇温パターン
ではあるが、該当スラブ前後のスラブの制約を考慮して
いないため実現可能なパターンである保証はない。The target heating pattern calculated here is an optimal heating pattern for baking only one slab, but it is a pattern that can be realized because the constraints of the slabs before and after the slab are not taken into consideration. There is no guarantee.

【００３７】影響係数計算手段１２はスラブ目標昇温パ
ターン計算手段１１から各帯炉温と目標昇温パターンを
入力し、各帯の炉温を基準点から変化させた場合、及び
各帯在帯時間を基準点から変化させた場合の加熱評価項
目値の変化をスラブ温度シミュレーションにより求め
る。その値を用いて影響係数を計算する。The influence coefficient calculation means 12 inputs each zone furnace temperature and target temperature rise pattern from the slab target temperature rise pattern calculation means 11 and changes the zone temperature of each zone from the reference point, and when each zone exists. The change of the heating evaluation item value when the time is changed from the reference point is obtained by the slab temperature simulation. The influence coefficient is calculated using the value.

【００３８】[0038]

【数６】ただし、Ｘ_0,out,i：スラブ個々の最適な目標昇温パターン計算
によって求めた抽出時加熱評価項目値の基準点Ｔ_0.j ：ｊ帯炉温基準点 τ_0,j ：ｊ帯在帯時間基準点である。[Equation 6] _However, X 0, _{out, i:} Slab individual optimum target reference point extraction during heating evaluation item value obtained by raising the temperature pattern calculated _T 0.j: j zone furnace temperature reference point τ _{0, j: j} band It is the resident time reference point.

【００３９】共通炉温計算手段１３は影響係数計算手段
１２で計算した影響係数を入力しスラブ毎に各帯の炉温
変化許容範囲を求め、その後未来時刻において同一帯に
存在する全てのスラブに許容される共通炉温を求め、さ
らにそれぞれのスラブ毎炉温からの２乗和が最小となる
共通炉温を求める。The common furnace temperature calculation means 13 inputs the influence coefficient calculated by the influence coefficient calculation means 12 to obtain the allowable range of the change in the furnace temperature of each zone for each slab, and thereafter, at all future slabs existing in the same zone. seeking a common furnace temperature to acceptable, determining a common furnace temperature further squared sums from each of the slabs each furnace temperature at a minimum.

【００４０】図６は共通炉温計算手段１３の処理手順を
示すフローチャートである。炉に装入されてスラブ毎目
標昇温パターン計算が完了した任意のスラブを対象に、
現在時刻から抽出予定時刻までの加熱評価項目値の変化
を、炉温と在帯時間に対する評価項目値の変化の影響係
数を用いて計算する。すなわち、ステップ１３１では時
刻初期値に現在時刻を設定する。ステップ１３２では帯
番号ｊを該当スラブ存在帯番号にする。ステップ１３３
からステップ１３８までが共通炉温計算部分である。ス
テップ１３３では該当スラブの炉温に影響を与える前後
スラブのｊ帯炉温許容範囲を計算する。該当スラブの今
後の位置は該当スラブより抽出側にあるスラブの抽出ピ
ッチと炉内位置を基に予測することが出来る。それを基
に各帯在帯時間を求める。FIG. 6 is a flowchart showing the processing procedure of the common furnace temperature calculation means 13. For any slab that has been charged into the furnace and the target heating pattern calculation for each slab has been completed,
The change in the heating evaluation item value of the extraction scheduled time or the current time is calculated using the influence coefficient of variation of the evaluation item value for furnace temperature and standing period of time. That is, in step 131, the present time is set as the time initial value. In step 132, the band number j is set to the corresponding slab existing band number. Step 133
From step to step 138 is the common furnace temperature calculation part. In step 133, the j-zone furnace temperature allowable range of the front and rear slabs that affects the furnace temperature of the relevant slab is calculated. The future position of the relevant slab can be predicted based on the extraction pitch and the in-furnace position of the slab on the extraction side of the relevant slab. Based on that, the time spent in each zone is calculated.

【００４１】第ｊ帯炉温許容範囲は、上限値までの許容
範囲は（18）式、下限値までの許容範囲は（19）式のよ
うに与えられる。Regarding the j-th zone furnace temperature allowable range, the allowable range up to the upper limit value is given by equation (18), and the allowable range up to the lower limit value is given by equation (19).

【００４２】[0042]

【数７】ただし、Ｘ_0,out,i：スラブ毎の最適な目標昇温パターン計算によって求めた抽出時加熱評価項目基準点Ｔ_0,i,j：ｊ帯炉温基準点 τ_0,i,j：帯在帯時間基準点Ｔ_X,U,i,j：加熱評価項目値を許容範囲にするための炉温上限値Ｔ_X,L,i,j：加熱評価項目値を許容範囲にするための炉温下限値Ｘ_U,out,i：加熱評価項目値の上限値Ｘ_L,out,j：加熱評価項目値の下限値添字ｉ：スラブ番号添字ｊ：炉帯番号である。[Equation 7] However, X _{0, out, i} : Heating evaluation item reference point T _{0, i, j} during extraction obtained by calculating the optimum target temperature rise pattern for each slab: j-zone furnace temperature reference point τ _{0, i, j} : In-zone time reference point T _{X, U, i, j} : Upper limit of furnace temperature T _{X, L, i, j for} keeping heating evaluation item value within the allowable range T _{X, L, i, j} : For keeping heating evaluation item value within the allowable range furnace temperature lower limit value X _{U, out, i:} the upper limit value X L of the heating evaluation item _{value, out, j:} the lower limit subscript i of heating evaluation item value: slab number subscript j: a furnace zone number.

【００４３】個々のスラブ毎にｊ帯炉温上下限値を求
め、それらの共通炉温がある場合には例えば（20）式を
用いて共通炉温を決定する。評価関数：制約条件：Ｔ_X,L,i,j≦Ｔ_j≦Ｔ_X,U,i,j（x,i はパラメータ）（21）上記第（20）式を（21）式の制約条件で最小にする炉温
Ｔ_jを求める。なお、（20）式にスラブ毎、あるいは評
価項目毎の重みを設けて重み付きの評価関数として、共
通炉温を決定することもできる。 The upper and lower limits of the j-zone furnace temperature are obtained for each slab, and if there are common furnace temperatures, the common furnace temperature is determined using, for example, equation (20). Evaluation function: Constraint condition: T _{X, L, i, j} ≤T _j ≤T _{X, U, i, j} (x, i are parameters) (21) The above equation (20) is minimized by the constraint condition of equation (21). The furnace temperature T _j to be obtained is determined. It is to be noted that weighting is applied to each slab or each evaluation item in the equation (20), and the weighted evaluation function is
It is also possible to determine the furnace temperature.

【００４４】共通炉温でスラブを加熱するとそれぞれの
スラブの加熱評価項目値はスラブ毎目標昇温パターン計
算結果から移動する。この加熱評価項目値の変化は
（３）式を用いて計算することができる。The pressurized thermal evaluation item value of each when heating the slab at a common furnace temperature slab moves from the slab each target Atsushi Nobori pattern calculation results. Change in pressure heat evaluation item value of this can be calculated using equation (3).

【００４５】目標昇温パターン計算手段１４は共通炉温
計算手段１３で計算した共通炉温を用いてスラブの温度
上昇を模擬し目標昇温パターンを求める。計算モデルは
（13），（14），（15）式である。The target temperature rise pattern calculation means 14 uses the common furnace temperature calculated by the common furnace temperature calculation means 13 to simulate the temperature rise of the slab and obtain the target temperature rise pattern. The calculation models are Eqs. (13), (14), and (15).

【００４６】抽出スケジユール修正手段１５は共通炉温
が存在しない場合に抽出スケジュールを変更してスラブ
加熱制約を満足するように加熱する。この抽出スケジュ
ール修正手段１５の処理手順を示すと図７のようにな
る。すなわち、ステップ１５１では該当スラブの加熱評
価項目値が上下限値範囲内であるか否かをチェックし、
範囲内であればステップ１５Ａの目標昇温パターン計算
ステップに飛び、範囲外であればステップ１５２に進
む。ステップ１５２ではどのスラブから抽出ピッチの変
更を行うかを決定する。これはヒューリスティック（he
uristic ）に決められるべきもので、例えば抽出時の平
均温度とスキッドマーク量に注目してそれらの値に共通
範囲があるスラブ群の先頭スラブを抽出ピッチ変更スラ
ブに定める。どの加熱評価項目値を用いるかは操業や品
質上の制約を考慮して決められる。When there is no common furnace temperature, the extraction schedule correction means 15 changes the extraction schedule and heats so as to satisfy the slab heating constraint. The processing procedure of the extraction schedule correction means 15 is shown in FIG. That is, the pressurized heat evaluation item value of the corresponding slab step 151 it is checked whether or not the upper limit value range,
If it is within the range, it jumps to the target temperature increase pattern calculation step of step 15A, and if it is out of the range, it proceeds to step 152. In step 152, it is determined from which slab the extraction pitch is to be changed. This is a heuristic (he
For example, paying attention to the average temperature and the skid mark amount during extraction, the leading slab of the slab group having a common range for these values is set as the extraction pitch changing slab. Which heating evaluation item value is used is determined in consideration of constraints on operation and quality.

【００４７】ステップ１５３では抽出ピッチ変更スラブ
群を一定の割合で抽出ピッチ変更した場合に加熱評価項
目値の変化をスラブ昇温シュミレーションによって求
め、ピッチの変更による抽出時の加熱評価項目値の変化
を計算する。ステップ１５４ではステップ１５３の計算
結果を使用してピッチ変更による加熱評価項目値の影響
係数を計算する。この計算には例えば（22），（23）式
が用いられる。[0047] determined by the slab heated simulate the change in the heating evaluation item value when changing extracted pitch extracted pitch changes slab group in step 153 at a constant rate, the change in the heating evaluation item value of the extraction due to the change of the pitch
To calculate. In step 154, the influence coefficient of the heating evaluation item value due to the pitch change is calculated using the calculation result of step 153. For example, equations (22) and (23) are used for this calculation.

【００４８】[0048]

【数８】ただし、Ｘ_0,out,i：スラブ毎の最適な目標昇温パターン計算によって求めた抽出時加熱評価項目値基準点Ｔ_0,i,j：ｊ帯炉温基準点 τ_0,i,j：ｊ帯在帯時間基準点Ｔ_X,U,i,j：加熱評価項目値を許容範囲にするための炉温上限値Ｔ_X,L,i,j：加熱評価項目値を許容範囲にするための炉温下限値Ｘ_U,out,i：加熱評価項目値の上限値Ｘ_L,out,i：加熱評価項目値の下限値添字ｉ：はスラブ番号添字ｊ：帯番号である。[Equation 8] However, X _{0, out, i} : Extraction heating evaluation item value reference point T _{0, i, j} obtained by calculating the optimum target temperature rise pattern for each slab: j-zone furnace temperature reference point τ _{0, i, j} : J-zone in-zone time reference point T _{X, U, i, j} : Upper limit of furnace temperature T _{X, L, i, j for making} heating evaluation item value within allowable range T _{X, L, i, j} : Heating evaluation item value within allowable range furnace temperature lower limit value X U _{for, out, i:} the upper limit value X L of the heating evaluation item _{value, out, i:} the lower limit subscript i of heating evaluation item value: slab number subscript j: a band number.

【００４９】設定炉温計算手段１６は目標昇温パター
ン、抽出スケジュール、スラブ実績温度を入力し、スラ
ブ温度が目標温度に追従するように各帯の炉温を計算す
る。これには従来のモデル予測制御等の技術が用いられ
る。The set furnace temperature calculation means 16 inputs the target heating pattern, the extraction schedule and the actual slab temperature, and calculates the furnace temperature of each zone so that the slab temperature follows the target temperature. For this, conventional techniques such as model predictive control are used.

【００５０】炉温設定値変更量ベクトルｕは（24）式
で求めることが出来る。The furnace temperature set value change amount vector u can be obtained by the equation (24).

【００５１】[0051]

【数９】ただし、行列の要素は以下の通りである。[Equation 9] However, the elements of the matrix are as follows.

【００５２】[0052]

【数１０】炉温設定値Ｔ_c,k（k=1,2,…,N_u）は、前回炉温設定値
をＴ_c,0とすると（４）式の定義により（19）式のよう
になる。[Equation 10] The furnace temperature set value T _{c, k} (k = 1,2, ..., N _u ) is given by the equation (19) according to the definition of the equation (4) when the previous furnace temperature set value is T _{c, 0} .

【００５３】[0053]

【数１１】ただしｇ_ijk ：影響係数。現時点から（ｋ−１）ステップ後
に炉温設定値を単位量変更したことによるｉスラブの現
時点からｊステップ後のスラブ温度変化量予測値
（℃）。定義によりｇ_ijk＝０（ｋ＞ｊ）である。[Equation 11] However, g _ijk : influence coefficient. A predicted slab temperature change amount (° C.) of the i slab after j steps from the present time by changing the unit value of the furnace temperature set value after (k−1) steps from the present time. By definition, g _ijk = 0 (k> j).

【００５４】θ_P,i,j：炉温設定値を保持したときのｉ
スラブ温度の現時点からｊステップ後の予測値（℃）。Θ _{P, i, j} : i when the furnace temperature set value is held
Predicted value (° C) of slab temperature after j steps from the present time.

【００５５】Δ_Ｔu,k：（ｋ−１）ステップ後の炉温設
定値変更量（℃）（k=1,2,…,N_u）実績処理手段１７は
炉温計２で検出した各帯の炉温を入力しスラブ実績温度
と総括熱吸収率を計算する。スラブ温度計算には例えば
（13），（14），（15）式が用いられる。また総括熱吸
収率φ_CGの同定には例えば以下の炉温モデルを用いる。Δ _{Tu, k} : Reactor temperature set value change amount (° C.) after (k−1) steps (k = 1,2, ..., N _u ) The result processing means 17 detects each with the furnace thermometer 2. Enter the zone furnace temperature and calculate the actual slab temperature and the overall heat absorption rate. Equations (13), (14), and (15) are used to calculate the slab temperature. Further, for example, the following furnace temperature model is used to identify the overall heat absorption coefficient φ _CG .

【００５６】Ｑ_in1,j＋Ｑ_in2,j＋Ｑ_in3,j＋Ｑ_in4,j ＝Ｑ_out1,j＋Ｑ_out2,j＋Ｑ_out3,j＋Ｑ_ADP,j （32）ただし、Ｑ_in1,j：燃料ガス燃焼熱Ｑ_in2,j：燃料ガス顕熱Ｑ_in3,j：空気顕熱Ｑ_in4,j：抽出側からの流入排ガス顕熱Ｑ_out1,j：スラブへの入熱量Ｑ_out2,j：流入排ガス顕熱Ｑ_out3,j：炉壁熱損失Ｑ_out4,j：スキッド熱損失である。Q _{in1, j} + Q _{in2, j} + Q _{in3, j} + Q _{in4, j} = Q _{out1, j} + Q _{out2, j} + Q _{out3, j} + Q _{ADP, j} (32) However, Q _{in1, j} : Fuel gas combustion heat Q _{in2, j} : Sensible heat of fuel gas Q _{in3, j} : Sensible air of air Q _{in4, j} : Sensible heat of inflowing exhaust gas from the extraction side Q _{out1, j} : _{Amount of} heat input to slab Q _{out2, j} : Sensible heat of inflowing exhaust gas Q _{out3, j} : furnace wall heat loss Q _{out4, j} : skid heat loss.

【００５７】図８は先行スラブの厚みが２６０ｍｍで、
後行スラブの厚みが２００ｍｍであり、途中から厚みが
ステップ的に６０ｍｍ薄くなり、抽出時平均温度の下限
値がステップ的に６０度高くなった場合のスラブ抽出温
度と第２帯から第５帯（均熱帯）までの炉温変化を模擬
計算した結果を示す。この例では後続材の抽出時平均温
度許容範囲が狭くなっているため後続材１本目（ｂ₁）
を焼き上げるのが難しいケースである。本実施形態の制
御装置を用いて制御することにより先行材最終から４本
前（ａ_n-3）より抽出時平均温度が徐々に高くなり、後
続材１本目（ｂ₁）の抽出時平均温度が下限値以上にな
るように制御されている。また後続材（ｂ₁，ｂ₂，ｂ
₃，…）は６０ｍｍ薄いため第２帯の炉温が２００度以
上下がって省エネルギー操業を実現している。In FIG. 8, the thickness of the preceding slab is 260 mm,
The slab extraction temperature and the second to fifth zones when the trailing slab has a thickness of 200 mm and the thickness is reduced stepwise by 60 mm from the middle, and the lower limit of the average temperature during extraction is stepwise increased by 60 degrees. The results of simulated calculation of furnace temperature change until (equal to tropical) are shown. In this example, the average temperature permissible range at the time of extraction of the subsequent material is narrow, so the first material of the subsequent material (b ₁ )
Is a difficult case to bake. Extraction time average temperature than four before (a _n-3) from the preceding material last by controlling with the control device of this embodiment gradually increases, during extraction the average temperature of the first run subsequent material (b ₁₎ Is controlled to be equal to or higher than the lower limit value. Further materials (b ₁ , b ₂ , b
₍₃ , ...) is 60 mm thin, so the furnace temperature in the second zone drops by 200 degrees or more, realizing energy-saving operation.

【００５８】図９に厚みが同じで抽出時平均温度下限値
が１５０度高くなった場合のスラブ抽出温度と第２帯か
ら第５帯（均熱帯）までの炉温変化を模擬計算した結果
を示す。この例では後続材の下限温度がステップ的に１
５０度も高くなるため本実施形態の制御装置は加熱待ち
時間を２０分と計算し自動的に加熱待ちを行うことによ
って後続材の抽出時平均温度を下限値以上としている。
この加熱待ちは後続材が第２加熱帯に侵入した時点で計
算されており、加熱炉オペレータに対して加熱待ち時間
を表示、あるいはアナウンスすることが可能である。従
ってオペレータは今後の加熱炉操業を予測しながら必要
な処置を取ることが出来る。先行材最終（ａ₁）から４
本前（ａ_n-4）より抽出時平均温度が徐々に高くなり、
先行材の抽出時平均温度許容範囲内で後続材１本目（ｂ
₁）の焼き上げのための操業を行っていることが分か
る。FIG. 9 shows the results of simulating calculation of the slab extraction temperature and the furnace temperature change from the second zone to the fifth zone (equal to the tropical zone) when the lower limit of the average temperature during extraction is 150 degrees higher with the same thickness. Show. In this example, the lower limit temperature of the subsequent material is 1 stepwise.
Since the temperature rises by 50 degrees, the controller of the present embodiment calculates the heating waiting time as 20 minutes and automatically waits for the heating so that the extraction-time average temperature of the succeeding material is equal to or higher than the lower limit value.
The heating waiting time is calculated when the succeeding material enters the second heating zone, and the heating waiting time can be displayed or announced to the heating furnace operator. Therefore, the operator can take necessary measures while predicting the future furnace operation. 4 from the last material (a ₁ )
The average temperature during extraction is gradually higher than before (a _n-4 ),
Within the allowable average temperature when extracting the preceding material, the following material (b)
It can be seen that the operation for baking ₁ ) is being performed.

【００５９】かくして、図１に示した実施形態によれ
ば、近接するスラブとの加熱評価項目値の制約条件や加
熱負荷が違う場合にも、各帯共通炉温を求め、さらに、
抽出スケジュールを変更することにより全てのスラブを
目標の加熱評価項目値の上下限値以内に焼き上げること
ができる。Thus, according to the embodiment shown in FIG. 1, the common furnace temperature for each zone is calculated even when the constraint condition of the heating evaluation item value and the heating load are different from those of the adjacent slab, and further,
By changing the extraction schedule, all slabs can be baked within the upper and lower limit values of the target heating evaluation item value .

【００６０】図２は請求項２に記載の連続加熱炉の温度
制御装置に対応する実施形態の構成を示すブロック図で
ある。図中、図１と同一の要素には同一の符号を付して
その説明を省略する。ここで、スラブ温度制御装置２０
は図１中の影響係数計算手段１２及び共通炉温計算手段
１３を除去し、その代わりに、試行錯誤的に共通炉温を
求める共通炉温計算手段２２と、共通炉温が求められる
毎に抽出スケジュールに従って、該当スラブと近隣スラ
ブの抽出までの温度予測計算を行う焼き上げ予測手段２
３を設けた構成になっている。FIG. 2 is a block diagram showing the configuration of an embodiment corresponding to the temperature control device for a continuous heating furnace described in claim 2. In the figure, the same elements as those of FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. Here, the slab temperature control device 20
Removes the influence coefficient calculating means 12 and the common furnace temperature calculating means 13 in FIG. 1, and instead, the common furnace temperature calculating means 22 for obtaining the common furnace temperature by trial and error, and each time the common furnace temperature is obtained. Baking prediction means 2 for performing temperature prediction calculation until extraction of the corresponding slab and neighboring slabs according to the extraction schedule
3 is provided.

【００６１】以下、この実施形態の動作について、特
に、図１と構成を異にする部分について説明する。共通
炉温計算手段２２は該当スラブに影響を及ぼす前後スラ
ブ群のスラブ毎の目標昇温パターンと炉温を入力し、初
期値として炉温を平均し平均値を初期値とする。焼き上
げ予測手段２３は現在から該当スラブ抽出時刻までスラ
ブ群の昇温を模擬する。計算モデルは例えば（13），
（14），（15）式を用いる。共通炉温計算手段２２は焼
き上げ予測手段２３からスラブ加熱評価項目値を入力
し、それが許容範囲内に入っているか否かをチェックす
る。もし範囲外であれば、外れている極性を確認して予
め決められた炉温度変化量だけ炉温を変え、再度、焼き
上げ予測手段に炉温を出力する。これを繰り返すことに
より共通炉温を求める。ただし、あるスラブの加熱評価
項目値が上限を外れ、他スラブの同一加熱評価項目値が
下限を外れる場合は、下限を外れるスラブをスラブ群か
ら除き、共通炉温を求める。The operation of this embodiment will be described below, in particular, regarding the part having a different configuration from that of FIG. The common furnace temperature calculation means 22 inputs the target temperature rising pattern and the furnace temperature for each slab of the front and rear slab groups that affect the corresponding slab, averages the furnace temperature as an initial value, and sets the average value as the initial value. The baking prediction means 23 simulates the temperature rise of the slab group from the present to the relevant slab extraction time. The calculation model is (13),
Equations (14) and (15) are used. Common furnace temperature calculating means 22 inputs the slab pressurized thermal evaluation item value from the prediction unit 23 baked, checks whether it is within the allowable range. If it is out of the range, the polarity that is out of the range is confirmed, the furnace temperature is changed by a predetermined furnace temperature change amount, and the furnace temperature is output to the baking prediction means again. By repeating this, the common furnace temperature is obtained. However, when the heating evaluation item value of a certain slab deviates from the upper limit and the same heating evaluation item value of another slab deviates from the lower limit, the slabs that deviate from the lower limit are excluded from the slab group and the common furnace temperature is obtained.

【００６２】評価から外れたスラブが存在する場合には
抽出スケジュール変更手段１５によって、図１を用いて
説明したと同様な動作により抽出ピッチを修正する。When there is a slab out of the evaluation, the extraction schedule changing means 15 corrects the extraction pitch by the same operation as described with reference to FIG.

【００６３】図２に示した実施形態によれば、炉温を変
えた場合の加熱評価項目値を常時計算するため、影響係
数を用いて計算する装置より計算精度が向上し、抽出ス
ケジュール変更時間修正も最小に抑えることが出来るた
め操業効率が向上する。[0063] According to the embodiment shown in FIG. 2, for calculating the pressurized heat evaluation item value when changing the furnace temperature always calculation accuracy by the device for calculating is improved by using the influence coefficient, extracting rescheduling Since the time correction can be minimized, the operation efficiency is improved.

【００６４】図３は請求項３に記載の連続加熱炉の温度
制御装置に対応する実施形態の構成を示すブロック図で
ある。図中、図１又は、図２と同一の要素には同一の符
号を付してその説明を省略する。ここで、スラブ温度制
御装置３０は図１中の影響係数計算手段１２及び共通炉
温計算手段１３を除去し、その代わりに初期炉温又は初
期炉温から任意帯炉温をある量だけ変化させた炉温を出
力し、この炉温に基づく加熱評価項目値を入力して炉温
及び在帯時間に対する影響係数を計算する影響係数計算
手段３１と、図２に示した焼き上げ予測手段２３と、演
算された影響係数に従って該当スラブの目標昇温パター
ンを計算する複数スラブに対する共通炉温計算手段３３
とを設けた構成になっている。FIG. 3 is a block diagram showing the configuration of an embodiment corresponding to the temperature control device for a continuous heating furnace according to claim 3. In the figure, the same elements as those of FIG. 1 or FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted. Here, the slab temperature control device 30 removes the influence coefficient calculation means 12 and the common furnace temperature calculation means 13 in FIG. 1, and instead changes the initial furnace temperature or the arbitrary zone furnace temperature from the initial furnace temperature by a certain amount. furnace temperature was output, the influence coefficient calculating means 31 for calculating the influence factor by entering based rather pressurized thermal evaluation item value into the furnace temperature for the furnace temperature and Zaiobi time, baking predicting means shown in FIG. 2 23, and a common furnace temperature calculation means 33 for a plurality of slabs that calculates a target heating pattern of the slab according to the calculated influence coefficient.
And is provided.

【００６５】以下、この実施形態の動作について、特
に、図１と構成を異にする部分について説明する。影響
係数計算手段３１はスラブの炉内位置、厚み、幅、長
さ、鋼種、装入温度等のスラブ情報及びスラブの抽出ス
ケジュールを入力する一方、予め設定若しくは入力され
た初期炉温又は初期炉温から任意帯炉温を所定の量だけ
変化させた炉温及び抽出スケジュールを焼き上げ予測手
段２３に出力し、その出力に対応して焼き上げ予測手段
２３から入力される加熱評価項目値と前記スラブ情報と
に基づき、炉温の微小変化に対する加熱評価項目値への
影響係数、及び在帯時間の微小変化に対する加熱評価項
目値への影響係数を、例えば（16），（17）式を用いて
計算する。複数スラブに対する共通炉温計算手段３３は
複数スラブの制約条件をもとに例えば線形計画法に従っ
て共通炉温とその炉温による該当スラブの目標昇温パタ
ーンを計算する。The operation of this embodiment will be described below, in particular, regarding the part having a different configuration from that of FIG. Influence coefficient calculation hand stage 31 is the furnace position of the slab, the thickness, width, length, steel grade, while entering the slab information and slabs extraction schedule charging temperature, the initial furnace temperature, or the initial preset or input Predicting the firing temperature of the furnace temperature and extraction schedule by changing the furnace temperature from the furnace temperature by a predetermined amount
Output to the stage 23, and the baking prediction means corresponding to the output
Based on the pressurizing heat evaluation item values are entered from 23 and the slab information, influence coefficient of the heating evaluation item value for small changes in furnace temperature, and the influence coefficient of the heating evaluation item value for small changes in Zaiobi time , For example, using equations (16) and (17). Common furnace temperature and its furnace to calculate the target Atsushi Nobori pattern of the corresponding slab by temperature in accordance with the original, for example linear programming constraints of multiple slabs common furnace temperature calculating means 33 for a plurality slabs.

【００６６】図３に示した実施形態によれば、複数スラ
ブの制約条件を用いて該当スラブの目標昇温パターンお
よび共通炉温を計算するため、一度の計算で目標昇温パ
ターンを求めることが出来、計算時間が短縮される。According to the embodiment shown in FIG. 3, the target heating pattern and the common furnace temperature of the corresponding slab are calculated using the constraint conditions of a plurality of slabs, so the target heating pattern can be obtained by one calculation. Yes, the calculation time is shortened.

【００６７】図４は請求項４に記載の連続加熱炉の温度
制御装置に対応する実施形態の構成を示すブロック図で
ある。図中、図１と同一の要素には同一の符号を付して
その説明を省略する。ここでスラブ温度制御装置４０は
図１中の影響係数計算手段１２を除去し、その代わりに
スラブ毎炉温許容範囲計算手段４１を設け、これにプロ
セスの逆モデル学習手段４２を付帯的に設けた構成にな
っている。FIG. 4 is a block diagram showing the configuration of an embodiment corresponding to the temperature control device for a continuous heating furnace according to claim 4. In the figure, the same elements as those of FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. Here, the slab temperature control device 40 removes the influence coefficient calculation means 12 in FIG. 1 and, instead of it, provides slab-specific permissible furnace temperature calculation means 41, and additionally includes inverse model learning means 42 of the process. It has been configured.

【００６８】以下、この実施形態の動作について、特
に、図１と構成を異にする部分について説明する。プロ
セスの逆モデル学習手段４２はニューラルネットワーク
で構成されており、予めオフラインで学習を行って各ノ
ード間の重みを決定しておく。スラブ毎炉温許容範囲計
算手段４１は加熱評価項目値、及びその上下限値、スラ
ブ実績温度をプロセスの逆モデル学習手段４２に出力す
る。プロセスの逆モデル学習手段４２はスラブ毎炉温許
容範囲計算手段４１から加熱評価項目値の上下限値を入
力しニューラルネットワーク演算により各帯炉温上下限
値を出力する。共通炉温計算手段１３は各帯のスラブ毎
の炉温上下限値をもとに共通炉温を決定する。共通炉温
の決定方法は図１を用いて説明したのと同様である。The operation of this embodiment will be described below, in particular, regarding the part having a configuration different from that of FIG. The inverse model learning means 42 of the process is composed of a neural network, and performs offline learning in advance to determine the weight between the nodes. Slab each furnace temperature tolerance calculation means 41 is pressurized thermal evaluation item value, and its upper and lower limit values, and outputs the slab actual temperature inverse model learning means 42 of the process. The inverse model learning means 42 of the process inputs the upper and lower limits of the heating evaluation item value from the per-slab furnace temperature allowable range calculating means 41 and outputs the upper and lower limits of each zone furnace temperature by the neural network calculation. The common furnace temperature calculation means 13 determines the common furnace temperature based on the furnace temperature upper and lower limits for each slab in each zone. The method of determining the common furnace temperature is the same as that described with reference to FIG.

【００６９】図４に示した実施形態によれば、影響係数
を予めニューラルネットワークに学習させておき、オン
ラインではプロセス逆モデルとして使用するため、炉
温、在帯時間と抽出加熱評価項目値の非線形の変化を考
慮することが出来、しかも高速演算が可能となる。According to the embodiment shown in FIG. 4, since the influence coefficient is preliminarily learned by the neural network and is used as a process inverse model online, the non-linearity of the furnace temperature, the in-zone time and the extracted heating evaluation item value is nonlinear. Can be taken into consideration, and high-speed calculation can be performed.

【００７０】図５は請求項５に記載の連続加熱炉の温度
制御装置に対応する実施形態の構成を示すブロック図で
ある。図中、図１乃至図４と同一の要素には同一の符号
を付してその説明を省略する。この装置は図１乃至図４
に示したスラブ温度制御装置１０，２０，３０，４０の
いずれかの前段に、監視手段５０を接続したもので、こ
の監視手段５０は、常時一定周期で線形化した影響係数
を用いて加熱評価項目値を計算し、その値が上下限許容
範囲を外れた場合は温度制御装置１０，２０，３０，４
０のいずれか接続されたものを起動する。これにより常
時炉内の全てのスラブの焼き上がりをチェックすること
が可能となるため、常に目標昇温パターン計算および抽
出ピッチ修正を行うことができ、加熱評価項目値を許容
範囲内に維持することができる。FIG. 5 is a block diagram showing the configuration of an embodiment corresponding to the temperature control device for a continuous heating furnace according to the fifth aspect. In the figure, the same elements as those of FIGS. 1 to 4 are designated by the same reference numerals and the description thereof will be omitted. This device is shown in FIGS.
To any of the preceding slab temperature control device 10, 20, 30, 40 shown in, obtained by connecting a monitoring device 50, the monitoring means 50 pressurized heat using linearized influence coefficient at all times a constant period When the evaluation item value is calculated and the value is out of the upper and lower limit allowable range, the temperature control device 10, 20, 30, 4
Start any one of 0 connected. Since it is possible thereby to check the oven all the slabs always furnace, it is possible to always perform a target Atsushi Nobori pattern calculated and extracted pitch modifications, to maintain the pressurized heat evaluation item value within the permissible range be able to.

【００７１】以上、本発明を好適な実施形態について説
明したが、本発明は上記の構成に限らず、例えば、ＥＷ
Ｓ（Engineering Work Station）等の分散処理システム
で複数のハードウェアとして実現しても良い。また、上
記実施形態では目標昇温パターン計算に線形計画法を用
いたが、この代わりに非線形計画法により実現するよう
にしても、上述したと同様な効果が得られる。The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described configuration, and for example, EW
It may be realized as a plurality of hardware by a distributed processing system such as S (Engineering Work Station). Further, although the linear programming method is used for the calculation of the target temperature rise pattern in the above-described embodiment, the same effect as described above can be obtained even if the linear programming method is used instead.

【００７２】[0072]

【発明の効果】以上、説明したように本発明の連続加熱
炉の温度制御装置によれば、近接するスラブとの加熱評
価項目値の制約条件や加熱負荷が違う場合にも各帯共通
炉温を求め、さらに抽出スケジュールを変更することに
より全てのスラブを目標の加熱評価項目値の上下限値以
内に焼き上げることが可能になる。As described above, according to the temperature control device for a continuous heating furnace of the present invention, even if the constraint condition of the heating evaluation item value and the heating load with the adjacent slab are different, the common furnace temperature of each zone It is possible to bake all the slabs within the upper and lower limit values of the target heating evaluation item value by obtaining the above and further changing the extraction schedule.

【００７３】また、加熱途中で予定変更があった場合で
も各帯共通炉温を求め、さらに抽出スケジュールを変更
することによりすべてのスラブを目標の加熱評価項目値
の上下限値以内に焼き上げることが可能になる。Further, even if the schedule is changed during heating, the common furnace temperature for each zone is obtained, and the extraction schedule is further changed to set the target heating evaluation item value for all slabs.
It becomes possible to bake within the upper and lower limits of.

【００７４】さらにまた、抽出スケジュール変更は焼け
不足スラブが抽出口に近づいてから行うのではなく、任
意のタイミングで行うことができるためオペレータが制
御装置の計算結果を早い時期に確認することができるた
め、オペレータの負担を軽減することができる。Furthermore, the extraction schedule can be changed at an arbitrary timing rather than after the underburned slab approaches the extraction port, so that the operator can check the calculation result of the control device at an early stage. Therefore, the burden on the operator can be reduced.

【００７５】また、焼け不足スラブを早期に発見できる
ため加熱帯で加熱することができ、抽出時の均熱度やス
キッドマーク量を小さく抑え、そのことにより圧延製品
の品質を向上させることができる等の優れた効果を期待
することができ、省エネルギー、高品質、歩留まりの向
上に効果がある。Further, since an underburned slab can be found early, it can be heated in the heating zone, and the soaking degree and skid mark amount at the time of extraction can be suppressed to a small level, thereby improving the quality of rolled products. It is possible to expect the excellent effect of, and it is effective in energy saving, high quality, and improvement of yield.

[Brief description of drawings]

【図１】本発明の請求項１に記載の連続加熱炉の温度制
御装置に対応する実施形態の構成を示すブロック図。FIG. 1 is a block diagram showing a configuration of an embodiment corresponding to a temperature control device for a continuous heating furnace according to claim 1 of the present invention.

【図２】本発明の請求項２に記載の連続加熱炉の温度制
御装置に対応する実施形態の構成を示すブロック図。FIG. 2 is a block diagram showing a configuration of an embodiment corresponding to a temperature control device for a continuous heating furnace according to claim 2 of the present invention.

【図３】本発明の請求項３に記載の連続加熱炉の温度制
御装置に対応する実施形態の構成を示すブロック図。FIG. 3 is a block diagram showing a configuration of an embodiment corresponding to a temperature control device for a continuous heating furnace according to claim 3 of the present invention.

【図４】本発明の請求項４に記載の連続加熱炉の温度制
御装置に対応する実施形態の構成を示すブロック図。FIG. 4 is a block diagram showing a configuration of an embodiment corresponding to a temperature control device for a continuous heating furnace according to claim 4 of the present invention.

【図５】本発明の請求項５に記載の連続加熱炉の温度制
御装置に対応する実施形態の構成を示すブロック図。FIG. 5 is a block diagram showing a configuration of an embodiment corresponding to a temperature control device for a continuous heating furnace according to claim 5 of the present invention.

【図６】本発明の連続加熱炉の温度制御装置の実施形態
を構成する共通炉温計算手段の処理手順を示すフローチ
ャート。FIG. 6 is a flowchart showing a processing procedure of a common furnace temperature calculation means constituting an embodiment of a temperature control device for a continuous heating furnace of the present invention.

【図７】本発明の連続加熱炉の温度制御装置の実施形態
を構成する抽出スケジュール修正手段の処理手順を示す
フローチャート。FIG. 7 is a flow chart showing a processing procedure of an extraction schedule correction means which constitutes an embodiment of a temperature control device for a continuous heating furnace of the present invention.

【図８】本発明の請求項１に記載の連続加熱炉の温度制
御装置に対応する実施形態の動作を説明するために、炉
帯の炉温と時間との関係を示した線図。FIG. 8 is a diagram showing a relationship between furnace temperature of a furnace zone and time for explaining the operation of the embodiment corresponding to the temperature control device for a continuous heating furnace according to claim 1 of the present invention.

【図９】本発明の請求項１に記載の連続加熱炉の温度制
御装置に対応する実施形態の動作を説明するために、炉
帯の炉温と時間との関係を示した線図。FIG. 9 is a diagram showing the relationship between the furnace temperature of the furnace zone and time in order to explain the operation of the embodiment corresponding to the temperature control device for a continuous heating furnace according to claim 1 of the present invention.

[Explanation of symbols]

１加熱炉２炉温計３炉温制御装置１０，２０，３０，４０スラブ温度制御装置１１スラブ毎目標昇温パターン計算手段１２，３１影響係数計算手段１３共通炉温計算手段１４目標昇温パターン計算手段１５抽出スケジュール修正手段１６設定炉温計算手段１７実績処理手段２２共通炉温計算手段２３焼き上げ予測手段３３複数スラブに対する共通炉温計算手段４１スラブ毎炉温許容範囲計算手段４２プロセスの逆モデル学習手段５１監視手段1 Heating Furnace 2 Furnace Thermometer 3 Furnace Temperature Controller 10, 20, 30, 40 Slab Temperature Controller 11 Target Slab Temperature Increase Pattern Calculation Means 12, 31 Influence Coefficient Calculation Means 13 Common Furnace Temperature Calculation Means 14 Target Temperature Increase Pattern Calculation means 15 Extraction schedule correction means 16 Set furnace temperature calculation means 17 Actual result processing means 22 Common furnace temperature calculation means 23 Baking prediction means 33 Common furnace temperature calculation means 41 for multiple slabs 41 Slab-specific furnace temperature allowable range calculation means 42 Inverse model of process Learning means 51 Monitoring means

───────────────────────────────────────────────────── フロントページの続き (72)発明者山口直樹東京都府中市東芝町１番地株式会社東芝府中工場内 (72)発明者武智敏貞千葉県千葉市中央区川崎町１番地川崎製鉄株式会社千葉製鉄所内 (72)発明者吉田邦雄千葉県千葉市中央区川崎町１番地川崎製鉄株式会社千葉製鉄所内 (72)発明者前田一郎千葉県千葉市中央区川崎町１番地川崎製鉄株式会社千葉製鉄所内 (72)発明者大石英之千葉県千葉市中央区川崎町１番地川崎製鉄株式会社千葉製鉄所内 (56)参考文献特開平１−198431（ＪＰ，Ａ) 特開平５−230526（ＪＰ，Ａ) 特開平４−88122（ＪＰ，Ａ) 特公平６−84867（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.⁷，ＤＢ名) C21D 11/00 C21D 9/00 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Naoki Yamaguchi Inventor Naoki Yamaguchi 1st Toshiba Town, Fuchu, Tokyo Inside Toshiba Fuchu Factory (72) Inventor Satoshi Takechi 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. in Chiba Works (72) Inventor Kunio Yoshida 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Steel Co., Ltd. in Chiba Works (72) Ichiro Maeda Kawasaki-cho, Chuo-ku, Chiba City No. 1 Kawasaki Steel Co., Ltd. in Chiba Steel Works (72) Inventor Hideyuki Oishi No. 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Steel Co., Ltd. in Chiba Works (56) Reference JP-A-1-198431 (JP, A) ) JP-A-5-230526 (JP, A) JP-A-4-88122 (JP, A) JP-B-6-84867 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) C21D 11/00 C21D 9/00

Claims

(57) [Claims]

1. A temperature controller for a continuous heating furnace having a furnace temperature controller for controlling the furnace temperature of a multi-zone heating furnace for continuously heating a slab, wherein an average slab temperature during extraction, a soaking degree, and a skid mark amount. Input the upper and lower limit values of the equal heating evaluation item value , steel type, size and slab extraction schedule, and calculate the optimum target heating pattern that minimizes the fuel flow rate for each slab and the furnace temperature of each zone corresponding to this pattern. Target heating pattern calculation means for each slab, the influence coefficient to the heating evaluation item value for the minute change of the furnace temperature based on the furnace temperature of each zone corresponding to the optimum target heating pattern, and each zone calculated from the extraction schedule and influence coefficient calculating means for calculating an influence coefficient of the heating evaluation item value for the change in each band standing zone time standing strip time as a reference, the time following the said slab on the basis of the influence coefficient was charged A common furnace temperature calculating means for calculating a common furnace temperature of each band that KOR in relation to the neighboring slabs corresponding slab at any time, the heating evaluation item value when the common furnace temperature does not exist in the upper and lower limit range of Extraction schedule modification means for modifying the extraction schedule for insertion, target heating pattern calculation means for calculating a target heating pattern based on the calculated common furnace temperature and the modified extraction schedule, and slab furnace position , Thickness, width, length, steel type, charging temperature,
Actual processing means for inputting slab information such as actual temperature at the last calculation time and the current furnace temperature and calculating the actual temperature for each slab, the target heating pattern, the corrected extraction schedule and the actual temperature for each slab And a set furnace temperature calculation means for calculating a set value of the furnace temperature and inputting the set value to the furnace temperature control device, the temperature control device for a continuous heating furnace.

2. A temperature controller for a continuous heating furnace having a furnace temperature controller for controlling the furnace temperature of a multi-zone heating furnace for continuously heating a slab, wherein an average slab temperature during extraction, a soaking degree, and a skid mark amount. Input the upper and lower limit values of the equal heating evaluation item value , steel type, size and slab extraction schedule, and calculate the optimum target heating pattern that minimizes the fuel flow rate for each slab and the furnace temperature of each zone corresponding to this pattern. Each slab target temperature rise pattern calculation means, determined by the relationship between the slab neighboring slab at any time after the time when the slab was charged based on the furnace temperature of each zone corresponding to the optimum target temperature rise pattern a common furnace temperature of each band together temporarily determined by predictive calculation, a common reactor temperature calculating means for determining a common furnace temperature using a pressurized heat evaluation item value of the corresponding slabs and neighboring slabs, the common furnace temperature calculating means Yo Common furnace temperature entering the provisionally determined Te, predicts the temperature up to extract the corresponding slabs and neighboring slabs in accordance with the extraction schedule and baked prediction means for inputting a heating evaluation item value into the common reactor temperature calculating means, the common Extraction schedule modification means for modifying the extraction schedule so that the heating evaluation item value falls within the upper and lower limit range when the furnace temperature does not exist, and the target temperature rise based on the determined common furnace temperature and the modified extraction schedule. Target heating pattern calculation means to calculate the pattern, the furnace position of the slab, thickness, width, length, steel type, charging temperature,
Actual processing means for inputting slab information such as actual temperature at the last calculation time and the current furnace temperature and calculating the actual temperature for each slab, the target heating pattern, the corrected extraction schedule and the actual temperature for each slab And a set furnace temperature calculation means for calculating a set value of the furnace temperature and inputting the set value to the furnace temperature control device, the temperature control device for a continuous heating furnace.

3. A temperature control device for a continuous heating furnace, comprising a furnace temperature control device for controlling the furnace temperature of a multi-zone heating furnace for continuously heating a slab, wherein the position, thickness, width and length of the slab in the furnace. While inputting slab information such as steel type, charging temperature, and slab extraction schedule, the preset furnace temperature or preset furnace temperature or the furnace temperature obtained by changing an arbitrary zone furnace temperature by a predetermined amount and the above and outputs the extracted schedule baked predicting means, based on the pressure <br/> heat evaluation item values are entered from the baked predicting means in response to the output and the slab information, heated evaluation items for small changes in furnace temperature influence coefficient to the value, and the influence coefficient calculating means for calculating an influence coefficient of the heating evaluation item value for changes in each band standing zone time, the initial furnace temperature, or the initial furnace temperature is output from the influence coefficient calculating means Arbitrary zone furnace temperature Predicting the temperature until the extraction of the relevant slab and neighboring slabs based on the furnace temperature and the extraction schedule changed by a predetermined amount, and outputting a heating evaluation item value and giving a baking prediction means to the influence coefficient calculation means. , type and calculated each influence coefficient and heated evaluation item value calculating a common furnace temperature of each band that KOR in relation to the neighboring slabs corresponding slab at any time in target Atsushi Nobori pattern for each slab Common furnace temperature calculation means, extraction schedule modification means for modifying the extraction schedule so that the heating evaluation item value falls within the upper and lower limit range when the common furnace temperature does not exist, the common furnace temperature and the modified extraction schedule Target heating pattern calculation means for calculating the target heating pattern based on the following, the furnace position of the slab, thickness, width, length, steel type, charging temperature,
Actual processing means for inputting slab information such as actual temperature at the last calculation time and the current furnace temperature and calculating the actual temperature for each slab, the target heating pattern, the corrected extraction schedule and the actual temperature for each slab And a set furnace temperature calculation means for calculating a set value of the furnace temperature and inputting the set value to the furnace temperature control device, the temperature control device for a continuous heating furnace.

4. A temperature controller for a continuous heating furnace having a furnace temperature controller for controlling the furnace temperature of a multi-zone heating furnace for continuously heating a slab, wherein an average slab temperature during extraction, a soaking degree, and a skid mark amount. Input the upper and lower limit values of the equal heating evaluation item value , steel type, size and slab extraction schedule, and calculate the optimum target heating pattern that minimizes the fuel flow rate for each slab and the furnace temperature of each zone corresponding to this pattern. Target slab temperature rise pattern calculation means and neural that inputs heating evaluation item values and outputs each zone furnace temperature
Slab furnace temperature allowable range calculation means for obtaining each zone furnace temperature allowable change range for each slab in advance by the network, and corresponding at any time after the time when the slab is charged based on the zone furnace temperature change allowable range a common furnace temperature calculating means for calculating a common furnace temperature of each band that KOR in relation to the neighboring slabs of the slab, the extraction schedule to take into the upper and lower limit range of heating evaluation item value when the common furnace temperature does not exist Extraction schedule correction means for correction, target temperature rise pattern calculation means for calculating a target temperature rise pattern based on the calculated common furnace temperature and the corrected extraction schedule, and position, thickness, width, length of the slab in the furnace , Steel grade, charging temperature,
Actual processing means for inputting slab information such as actual temperature at the last calculation time and the current furnace temperature and calculating the actual temperature for each slab, the target heating pattern, the corrected extraction schedule and the actual temperature for each slab And a set furnace temperature calculation means for calculating a set value of the furnace temperature and inputting the set value to the furnace temperature control device, the temperature control device for a continuous heating furnace.

5. Evaluation items for heating with respect to changes in furnace temperature and in-zone time
It is equipped with a monitoring unit that predicts a value change at regular intervals using the influence coefficient and activates a unit that calculates the common furnace temperature and the corrected extraction pitch when the value is out of the allowable range. The temperature control device for a continuous heating furnace according to any one of claims 1 to 4.