JPH0469208B2 - - Google Patents
Info
- Publication number
- JPH0469208B2 JPH0469208B2 JP60192461A JP19246185A JPH0469208B2 JP H0469208 B2 JPH0469208 B2 JP H0469208B2 JP 60192461 A JP60192461 A JP 60192461A JP 19246185 A JP19246185 A JP 19246185A JP H0469208 B2 JPH0469208 B2 JP H0469208B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- temperature
- zone
- heating
- width direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 15
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012821 model calculation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Control Of Heat Treatment Processes (AREA)
- Tunnel Furnaces (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はブルーム、スラブ等の鋳片を連続的に
加熱する加熱炉において、炉巾方向の炉温を制御
して被加熱材を均一又は傾斜加熱する自動燃焼制
御方法に関するものである。Detailed Description of the Invention [Industrial Application Field] The present invention is a heating furnace that continuously heats slabs such as blooms and slabs, and controls the furnace temperature in the width direction of the furnace to uniformly or uniformly heat the heated material. This invention relates to an automatic combustion control method that performs gradient heating.
従来の加熱炉における加熱炉の自動燃焼制御で
は、例えば技術文献『連続鋼片加熱炉における伝
熱実験と計算方法』（日本鉄鋼協会編 S46年５
月10日発行）に記載されているように、炉長手方
向の温度設定対象ゾーン（予熱帯、加熱帯、均熱
帯）毎に総括熱吸収率φcGを設定し、被加熱材が
存在する炉長手方向位置の該φcGを用いて鋳片温
度を計算し、目標鋳片温度を得るために必要な設
定温度を決定する方法、がすでに公知である。
For automatic furnace combustion control in conventional heating furnaces, for example, the technical document ``Heat transfer experiments and calculation methods in continuous billet heating furnaces'' (edited by the Iron and Steel Institute of Japan, May 5, 2015)
The overall heat absorption rate φc G is set for each temperature setting target zone in the longitudinal direction of the furnace (pre-heating zone, heating zone, soaking zone), and A method is already known in which the temperature of the slab is calculated using the longitudinal position φc G and the set temperature required to obtain the target slab temperature is determined.
ところが上記従来方法では、該当鋳片の１つの
炉巾方向の代表温度が目標温度になるように炉温
設定をし、制御するものであり、炉巾方向の鋳片
温度むらを積極的になくすための制御を行なうも
のではなかつた。このことは特に線材、棒材等の
圧延に用いられる炉巾方向に長い鋳片（ブルー
ム）において、材料長手方向の温度分布が均一と
なるように加熱する場合には大きな問題であり、
その改善が望まれていた。
However, in the conventional method described above, the furnace temperature is set and controlled so that the representative temperature in the furnace width direction of one applicable slab becomes the target temperature, and the unevenness of slab temperature in the furnace width direction is actively eliminated. It was not intended to control the situation. This is a big problem especially when heating a long slab (bloom) in the width direction of the furnace used for rolling wire rods, bars, etc. so that the temperature distribution in the longitudinal direction of the material is uniform.
Improvement was desired.
本発明は上記問題点に鑑み、これを解決する燃
焼制御方法を発明したものであつて、その目的
は、加熱炉の炉巾方向に複数の炉温設定ゾーンを
設け鋳片温度をトツプ部、ミドル部、ボトム部等
独立に把握し、各ゾーン独立に炉温設定を行な
い、鋳片の均一加熱又は、傾斜加熱できる加熱炉
の自動燃焼制御方法を提供するにある。
In view of the above-mentioned problems, the present invention has devised a combustion control method to solve the problems.The purpose of the present invention is to provide a plurality of furnace temperature setting zones in the width direction of the heating furnace so as to control the temperature of the slab at the top, An object of the present invention is to provide an automatic combustion control method for a heating furnace which can independently grasp the middle part, bottom part, etc., independently set the furnace temperature for each zone, and enable uniform heating or gradient heating of slabs.
上記目的を達成するための本発明方法の特徴
は、炉巾方向に設けられた複数個の加熱バーナを
用いて炉長方向に移送される被加熱材を連続的に
加熱する加熱炉において、該加熱炉の炉巾方向を
少なくとも３分割した炉温設定ゾーンを設け、該
ゾーン毎に炉温設定用熱電対とゾーン毎に制御可
能な加熱バーナを配置し、被加熱材の初期温度と
該熱電対の炉温測定から、炉内各ゾーン毎の被加
熱材温度を演算し該加熱材温度から各ゾーン毎の
設定炉温を演算し、該演算結果に基づいて、各ゾ
ーン毎に炉温設定して、前記加熱バーナの燃焼制
御により被加熱材炉巾方向の温度分布を制御する
ことを特徴とする加熱炉の自動燃焼制御方法にあ
る。
The method of the present invention for achieving the above object is characterized in that a heating furnace that continuously heats a material to be heated that is transferred in the length direction of the furnace using a plurality of heating burners provided in the width direction of the furnace. The furnace width direction of the heating furnace is divided into at least three furnace temperature setting zones, and a thermocouple for furnace temperature setting and a heating burner that can be controlled for each zone are arranged in each zone, and the initial temperature of the material to be heated and the thermocouple are arranged. From the pair of furnace temperature measurements, calculate the temperature of the heated material for each zone in the furnace, calculate the set furnace temperature for each zone from the heated material temperature, and set the furnace temperature for each zone based on the calculation result. The present invention provides an automatic combustion control method for a heating furnace, characterized in that the temperature distribution in the width direction of the heated material is controlled by combustion control of the heating burner.
以下、図面を参照して本発明の制御方法を多帯
式加熱炉でビレツトを加熱する例について詳細に
説明する。第１図において、炉長手方向に予熱帯
２、加熱帯３および均熱帯４の３帯より構成され
る加熱炉１に、ビレツト炉入側に装入ビレツトの
表面温度を測定する温度計１３を設けるととも
に、各帯の炉巾方向を複数（図面では３個）の炉
温設定ゾーン５，６および７に分割し、各ゾーン
毎に炉温測定用熱電対９を各帯の入側に設け、さ
らに加熱帯３および均熱帯４の炉巾方向の各ゾー
ン５，６および７には、各ゾーンの炉温を制御す
る計装コントローラ１０と、操作端である加熱用
バーナ１１を設ける。さらに前記熱電対９の入力
信号に基づいて、加熱帯３および均熱帯４の鋼片
を目標温度に焼上げるために、各計装コントロー
ラ１０に炉温設定値を指示する演算装置１２を備
える。加熱炉１は、ウオーキングビーム炉、プツ
シヤー炉、ウオーキングハース炉等、どのタイプ
の炉でも実施可能であり、又、多帯式になつてい
ない一体炉でももちろん実施可能である。 Hereinafter, the control method of the present invention will be explained in detail with reference to the drawings, with reference to an example in which a billet is heated in a multi-zone heating furnace. In Fig. 1, a heating furnace 1 consists of three zones in the longitudinal direction of the furnace, a pre-heating zone 2, a heating zone 3, and a soaking zone 4, and a thermometer 13 for measuring the surface temperature of the charged billet is installed at the entrance side of the billet furnace. At the same time, the furnace width direction of each zone is divided into a plurality of (three in the drawing) furnace temperature setting zones 5, 6, and 7, and a thermocouple 9 for measuring the furnace temperature is installed at the entrance side of each zone for each zone. Furthermore, each zone 5, 6, and 7 in the furnace width direction of the heating zone 3 and the soaking zone 4 is provided with an instrumentation controller 10 for controlling the furnace temperature of each zone, and a heating burner 11 as an operating end. Furthermore, based on the input signal of the thermocouple 9, a calculation device 12 is provided which instructs each instrumentation controller 10 to set a furnace temperature in order to bake the steel pieces in the heating zone 3 and the soaking zone 4 to a target temperature. The heating furnace 1 can be any type of furnace, such as a walking beam furnace, a pusher furnace, a walking hearth furnace, or, of course, an integrated furnace that is not a multi-zone type furnace.
上記一例装置構成での、本発明の自動燃焼制御
方法を、炉巾方向を３つの炉温設定ゾーンに分割
して、鋳片をトツプ部、ミドル部およびボトム部
の各々を独立に制御する場合の作用について説明
する。
In the case where the automatic combustion control method of the present invention is applied to the above example equipment configuration, the furnace width direction is divided into three furnace temperature setting zones, and each of the top, middle and bottom parts of the slab is controlled independently. The effect of this will be explained.
鋳片（ビレツト）８は、まず加熱炉１の入側に
配置されている温度計１３により鋳片８（温片）
の長さ方向の装入温度が測定される。ビレツト８
の装入口が側壁側にある場合には、温度計１３は
その装入口上方に配置される。測定されたビレツ
ト８の初期温度は、演算装置（プロセスコンピユ
ータ）１２の鋳片温度計算器１２−１に入力され
る。予熱帯２に挿入されたビレツト８はプツシヤ
ー（図示せず）により押され、加熱炉１の抽出口
に向つてビレツト８が装入されるたびに順におく
られていく。装入された各ビレツト８の炉内での
位置は、ビレツトのサイズと装入時刻と装入ピツ
チにより入口からの距離として計算出来る。 The billet 8 is first measured by a thermometer 13 placed on the inlet side of the heating furnace 1.
The longitudinal charging temperature is measured. Billet 8
When the charging port is on the side wall side, the thermometer 13 is placed above the charging port. The measured initial temperature of the billet 8 is input to the slab temperature calculator 12-1 of the arithmetic unit (process computer) 12. The billets 8 inserted into the preheating zone 2 are pushed by a pusher (not shown) and are successively sent toward the extraction port of the heating furnace 1 each time the billets 8 are charged. The position of each charged billet 8 in the furnace can be calculated as the distance from the inlet using the billet size, charging time, and charging pitch.
炉内雰囲気温度は、予熱帯２、加熱帯３および
均熱帯４で各炉巾方向に３つに区切つたゾーン
５，６および７毎に配置されている熱電対９によ
り、一定の周期（例えば２分間隔）毎に測定され
る。測定結果は、演算装置１２の鋳片温度計算器
１２−１に入力される。該計算器１２−１におい
て各熱電対９直下のビレツト８の各帯各ゾーン毎
の温度が、公知の厳密解モデルにより計算され
る。その際厳密解モデル計算で使用する総括熱吸
収率は、各炉巾方向ゾーン毎に決定した数値を用
いる。炉長方向３点の測温による炉長方向の温度
分布より、炉内各ビレツト８の各ゾーン毎の温度
が推定出来る。得られた各ゾーンのビレツト８の
温度の値は、設定炉温計算器１２−２に出力さ
れ、該計算器１２−２でビレツト温度の計算値を
もとに、各ビレツトが加熱帯３出口および均熱帯
４出口において目標温度になるように在炉時間等
をもとに、必要な設定炉温が、各ゾーン毎に２分
毎間隔で算出され、その計算値が各計装コントロ
ーラー１０に出力される。各計装コントローラー
１０は各ゾーンが設定炉温になるよう加熱バーナ
ー１１の燃料流量を２分間隔で制御し、加熱バー
ナ１１の燃焼制御を行ない、炉巾方向のビレツト
の温度分布が均一に、かつ目標温度になるよう焼
き上げていくものである。尚、予熱帯２には加熱
バーナはなく予熱帯２での制御はおこなわれず、
ただビレツトの温度だけが計算される。又各ゾー
ンの加熱用バーナ１１は、炉巾方向を３つのゾー
ンに分割した場合通常４〜５個のバーナーが１組
として構成され配置される。 The temperature of the atmosphere inside the furnace is controlled at a certain period (e.g. measured every 2 minutes). The measurement results are input to the slab temperature calculator 12 - 1 of the calculation device 12 . In the calculator 12-1, the temperature of each zone of the billet 8 directly under each thermocouple 9 is calculated using a known exact solution model. At this time, the overall heat absorption rate used in the exact solution model calculation uses the value determined for each zone in the furnace width direction. The temperature in each zone of each billet 8 in the furnace can be estimated from the temperature distribution in the furnace length direction measured at three points in the furnace length direction. The obtained temperature value of the billet 8 in each zone is output to the set furnace temperature calculator 12-2, and based on the calculated value of the billet temperature in the calculator 12-2, each billet is set at the outlet of the heating zone 3. The necessary set furnace temperature is calculated for each zone at intervals of 2 minutes based on the furnace time etc. so that the target temperature is reached at the 4 outlets of the soaking zone, and the calculated value is sent to each instrumentation controller 10. Output. Each instrumentation controller 10 controls the fuel flow rate of the heating burner 11 at 2-minute intervals so that each zone reaches the set furnace temperature, and controls the combustion of the heating burner 11 so that the temperature distribution of the billet in the width direction of the furnace is uniform. It is then baked to a target temperature. In addition, there is no heating burner in the preheating zone 2, and no control is performed in the preheating zone 2.
Only the billet temperature is calculated. Further, the heating burners 11 in each zone are usually arranged as a set of 4 to 5 burners when the furnace width direction is divided into three zones.
炉温設定ゾーン数を少なくとも３個にした理由
は、炉巾方向の両端は側壁の輻射熱で高くなり、
中央部が低くなることから、これを巾方向均一に
するためには少なくとも３分割する必要があるた
めである。さらに炉巾方向の温度分布を均一にす
る場合にはゾーン数を増加させればよく、必要に
応じてゾーン数は増減出来るものである。なお、
ゾーン数は最大炉巾方向に配置している加熱バー
ナの数だけ設けることが出来る。ゾーン数を増し
た場合、熱電対９はゾーン数だけ設けるが、加熱
バーナー１組の個数は少なくなる。 The reason why we set the number of furnace temperature setting zones to at least three is that the temperature at both ends in the width direction of the furnace becomes high due to the radiant heat from the side walls.
This is because the central portion is lower, so in order to make it uniform in the width direction, it is necessary to divide it into at least three parts. Furthermore, in order to make the temperature distribution in the oven width direction uniform, the number of zones may be increased, and the number of zones can be increased or decreased as necessary. In addition,
The number of zones can be equal to the number of heating burners arranged in the direction of the maximum furnace width. When the number of zones is increased, the number of thermocouples 9 corresponding to the number of zones is provided, but the number of heating burners per set is reduced.
従来、加熱炉炉巾方向に±40℃の鋳片温度むら
が生じていたのに対して、本発明にかかる自動燃
焼制御方法によれば、炉巾方向に３つの制御ゾー
ンを設け、各制御ゾーン毎に独立して鋳片温度計
算および設定炉温計算を実施し、積極的に炉巾方
向温度分布を制御することにより鋳片温度むらは
±８℃となり、鋳片を同質均一にすることができ
た。
Conventionally, slab temperature unevenness of ±40°C occurred in the width direction of the heating furnace, but according to the automatic combustion control method according to the present invention, three control zones are provided in the width direction of the furnace, and each control By independently calculating the slab temperature and set furnace temperature for each zone and actively controlling the temperature distribution in the width direction of the furnace, the slab temperature unevenness is ±8℃, making the slab homogeneous. was completed.
なお、上記実施例では、鋳片の炉巾方向温度分
布を均一化することに主眼をおいて説明したが、
本発明方法によれば、逆に炉巾方向で鋳片に積極
的に温度差をもたせて焼上げる炉巾方向傾斜加熱
に適用できることは言い迄もない。 In addition, in the above embodiment, the explanation focused on making the temperature distribution of the slab in the width direction of the oven uniform.
It goes without saying that the method of the present invention can be applied to tilt heating in the furnace width direction, in which the slab is fired by actively creating a temperature difference in the furnace width direction.
本発明は以上のような構成を有する加熱炉の自
動燃焼制御方法であるから次のような効果があ
る。
Since the present invention is an automatic combustion control method for a heating furnace having the above configuration, it has the following effects.
(1) 鋳片長手向の温度むらを積極的に制御し、平
均化することが可能なため、特に線材等の様
に、長さの長い被加熱材の圧延において、温度
むらに起因する材質、特にTS（引張強さ）バラ
ツキが低減する。(1) Since it is possible to actively control and average the temperature unevenness in the longitudinal direction of the slab, it is possible to reduce the temperature unevenness caused by temperature unevenness, especially when rolling long heated materials such as wire rods. , especially the TS (tensile strength) variation is reduced.
(2) 鋳片長手方向トツプ部、ミドル部およびボト
ル部各々を独立に、必要とする量だけ効率良く
加熱することができるため燃料原単位が低減す
る。(2) The top, middle and bottle parts in the longitudinal direction of the slab can each be heated independently and efficiently by the required amount, reducing fuel consumption.
第１図は本発明にかかる自動燃焼制御方法を実
施する装置構成の概要を示すブロツク図である。
１：加熱炉、２：予熱帯、３：加熱帯、４：均
熱帯、５，６，７：炉巾方向制御単位、８：炉内
装入鋳片、９：炉温測定用熱電対、１０：計装コ
ントローラ、１１：加熱用バーナ、１２：プロセ
スコンピユータ、１３：装入温度計。
FIG. 1 is a block diagram showing an outline of the configuration of an apparatus for implementing the automatic combustion control method according to the present invention. 1: Heating furnace, 2: Pre-preparation zone, 3: Heating zone, 4: Soaking zone, 5, 6, 7: Furnace width direction control unit, 8: Slab placed in furnace, 9: Thermocouple for measuring furnace temperature, 10 : Instrumentation controller, 11: Heating burner, 12: Process computer, 13: Charge thermometer.
Claims (1)
用いて炉長方向に移送される被加熱材を連続的に
加熱する加熱炉において、該加熱炉の炉巾方向を
少なくとも３分割した炉温設定ゾーンを設け、該
ゾーン毎に炉温設定用熱電対とゾーン毎に制御可
能な加熱バーナを配置し、被加熱材の初期温度と
該熱電対の炉温測定から、炉内各ゾーン毎の被加
熱材温度を演算し該加熱材温度から各ゾーン毎の
設定炉温を演算し、該演算結果に基づいて、各ゾ
ーン毎に炉温設定して、前記加熱バーナの燃焼制
御により被加熱材炉巾方向の温度分布を制御する
ことを特徴とする加熱炉の自動燃焼制御方法。1. In a heating furnace that continuously heats a material to be heated that is transferred in the furnace length direction using a plurality of heating burners provided in the furnace width direction, the furnace temperature is determined by dividing the furnace width direction into at least three parts. A setting zone is established, and a thermocouple for setting the furnace temperature and a heating burner that can be controlled for each zone are arranged. From the initial temperature of the material to be heated and the furnace temperature measurement of the thermocouple, the temperature of each zone in the furnace is determined. The temperature of the heated material is calculated, the set furnace temperature for each zone is calculated from the temperature of the heated material, the furnace temperature is set for each zone based on the calculation result, and the heated material is controlled by combustion control of the heating burner. An automatic combustion control method for a heating furnace characterized by controlling temperature distribution in the width direction of the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19246185A JPS6254024A (en) | 1985-08-31 | 1985-08-31 | Method for controlling automatic combustion in heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19246185A JPS6254024A (en) | 1985-08-31 | 1985-08-31 | Method for controlling automatic combustion in heating furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6254024A JPS6254024A (en) | 1987-03-09 |
| JPH0469208B2 true JPH0469208B2 (en) | 1992-11-05 |
Family
ID=16291681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19246185A Granted JPS6254024A (en) | 1985-08-31 | 1985-08-31 | Method for controlling automatic combustion in heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6254024A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2746011B2 (en) * | 1992-10-19 | 1998-04-28 | 住友金属工業株式会社 | Heating furnace combustion control method |
| JPH0847251A (en) * | 1994-07-29 | 1996-02-16 | Internatl Business Mach Corp <Ibm> | Switching regulator,information processor and its control method |
| JP5181803B2 (en) * | 2008-04-23 | 2013-04-10 | 新日鐵住金株式会社 | Heating method of heated material |
| JP5509965B2 (en) * | 2010-03-23 | 2014-06-04 | 新日鐵住金株式会社 | Casting heating method |
| JP2012237028A (en) * | 2011-05-10 | 2012-12-06 | Nippon Steel Corp | Method for heating cast slab |
| JP2012237029A (en) * | 2011-05-10 | 2012-12-06 | Nippon Steel Corp | Method for heating cast slab |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS491992A (en) * | 1972-04-26 | 1974-01-09 | ||
| JPS54114405A (en) * | 1978-02-27 | 1979-09-06 | Sumitomo Metal Ind Ltd | Control of continuous heating furnace |
| JPS599125A (en) * | 1982-07-08 | 1984-01-18 | Kawasaki Steel Corp | Method for setting temperature of heating furnace |
| JPS6032696A (en) * | 1983-08-02 | 1985-02-19 | Fuji Xerox Co Ltd | Pressure-sensitive copy sheet |
-
1985
- 1985-08-31 JP JP19246185A patent/JPS6254024A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS491992A (en) * | 1972-04-26 | 1974-01-09 | ||
| JPS54114405A (en) * | 1978-02-27 | 1979-09-06 | Sumitomo Metal Ind Ltd | Control of continuous heating furnace |
| JPS599125A (en) * | 1982-07-08 | 1984-01-18 | Kawasaki Steel Corp | Method for setting temperature of heating furnace |
| JPS6032696A (en) * | 1983-08-02 | 1985-02-19 | Fuji Xerox Co Ltd | Pressure-sensitive copy sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6254024A (en) | 1987-03-09 |
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