JP2002115006A - Method for predicting abnormality in operation caused by fluctuation of blasting pressure in blast furnace - Google Patents
Method for predicting abnormality in operation caused by fluctuation of blasting pressure in blast furnaceInfo
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- JP2002115006A JP2002115006A JP2000309953A JP2000309953A JP2002115006A JP 2002115006 A JP2002115006 A JP 2002115006A JP 2000309953 A JP2000309953 A JP 2000309953A JP 2000309953 A JP2000309953 A JP 2000309953A JP 2002115006 A JP2002115006 A JP 2002115006A
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- blast furnace
- pressure
- measuring device
- change
- differential pressure
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高炉の風圧変動に
伴う操業異常予知方法に関し、特に吹き抜け現象を予知
して操業異常を予防しようとするものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for predicting an abnormal operation caused by a change in wind pressure of a blast furnace, and more particularly to a method for preventing an abnormal operation by predicting a blow-by phenomenon.
【０００２】[0002]
【従来の技術】近年の高炉操業においては、使用するコ
ークス量を減少させて低コスト化を図るために、粉炭比
を１３５〜１４０ｋｇ／ｔ程度まで増加させる操業が行
われている。しかしながら、高生産を行うと、融着帯下
部が限界付近にまで低下し、粉炭の熱レベルの調整のた
めに炉壁が煽られて風圧変動が発生してしまう。このよ
うな風圧変動が発生すると、いわゆる吹き抜け現象が生
じて操業異常となり、安定した高炉操業を行うことがで
きない。2. Description of the Related Art In recent blast furnace operations, in order to reduce the amount of coke to be used and to reduce the cost, an operation of increasing the pulverized coal ratio to about 135 to 140 kg / t is performed. However, when high production is performed, the lower part of the cohesive zone is reduced to near the limit, and the furnace wall is swung to adjust the heat level of the pulverized coal, thereby causing wind pressure fluctuations. When such a wind pressure fluctuation occurs, a so-called blow-by phenomenon occurs, and an operation becomes abnormal, and stable blast furnace operation cannot be performed.
【０００３】このような吹き抜け現象が発生する原因に
は、以下のものが考えられる。第１に、原材料の装入ト
ラブルや出銑のトラブル、あるいは原材料の装入におい
て円周方向のバランスが乱れていることが、吹き抜け現
象の原因となる。第２に、コークス比（コークス／出銑
量）を低くし、オアバイコークス（鉱石量とコークス量
の比）を高くすることにより、コークスベッドの形成不
良が発生し、これが吹き抜け現象の原因となる。第３
に、コークス粉化や焼結鉱還元粉化による粉の蓄積が、
吹き抜け現象の原因となる。第４に、高生産すなわち高
ボッシュガス量により炉下部の通気不良が発生し、これ
が吹き抜け現象の原因となる。The following are conceivable causes of such a blow-by phenomenon. First, the problem of charging of raw materials, the problem of tapping, or the imbalance in the circumferential direction in the charging of raw materials causes a blow-through phenomenon. Second, by lowering the coke ratio (coke / tapped amount) and increasing the ore coke (ratio between the amount of ore and the amount of coke), poor coke bed formation occurs, which causes the blow-through phenomenon. Become. Third
In addition, the accumulation of powder due to coke powdering and sinter reduction powdering,
It causes the blow-by phenomenon. Fourth, high production, that is, a high amount of Bosch gas, causes poor ventilation in the lower part of the furnace, which causes a blow-through phenomenon.
【０００４】高炉の安定操業を行うためには、これらの
吹き抜け現象の原因を特定して、予め除去する必要があ
る。また、吹き抜け現象の原因を特定するためには、吹
き抜け部位を特定しなければならない。従来より、この
種の操業異常を予知するための方法として、例えば特公
昭６０−４１１２３号公報、特公平３−１２６８０６号
公報等に、その技術が開示されている。このような従来
の操業異常の予知方法では、炉内に、温度、圧力、ガス
組成等を検出するためのセンサを設置し、これらのセン
サの測定値に基づいて設定基準値や理論値との比較を行
い、操業異常を予知していた。In order to stably operate the blast furnace, it is necessary to identify the cause of the blow-by phenomenon and remove it in advance. Also, in order to identify the cause of the blow-by phenomenon, the blow-by site must be specified. Conventionally, as a method for predicting this kind of operation abnormality, the technology is disclosed in, for example, Japanese Patent Publication No. 60-41123 and Japanese Patent Publication No. 3-126806. In such a conventional method for predicting operation abnormality, sensors for detecting temperature, pressure, gas composition, and the like are installed in a furnace, and a set reference value or a theoretical value based on measured values of these sensors is used. A comparison was made to predict operational abnormalities.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上述し
た従来の操業異常の予知方法では、操業異常が発生しよ
うとしているにもかかわらず、センサの測定値が異常を
示さないこともあり、操業異常の発生を的確に予知する
ことができなかった。また、センサの測定値が異常を示
した場合であっても、その解析には専門的知識を必要と
し、誰もが操業異常の発生を読みとることができるもの
ではなかった。このため、センサを設置した場合であっ
ても、操業異常の発生を予知するためには、結局、熟練
した作業者の勘に頼らざるを得ず、安定した高炉操業の
維持を難しいものとしていた。本発明に係る高炉の風圧
変動に伴う異常操業予知方法は、上述した事情に鑑み提
案されたもので、高炉の風圧変動に伴う操業異常を容易
かつ的確に予知することにより、安定した高炉操業を行
うことを目的とする。However, according to the above-mentioned conventional method for predicting an operation abnormality, the measured value of the sensor may not indicate an abnormality even though an operation abnormality is about to occur. The outbreak could not be accurately predicted. Further, even when the measurement value of the sensor indicates an abnormality, the analysis requires specialized knowledge, and no one can read the occurrence of the operation abnormality. For this reason, even if a sensor is installed, in order to predict the occurrence of an operation abnormality, it must ultimately rely on the intuition of a skilled worker, making it difficult to maintain stable blast furnace operation. . The abnormal operation prediction method according to the wind pressure fluctuation of the blast furnace according to the present invention is proposed in view of the above-described circumstances, and easily and accurately predicts the operation abnormality due to the wind pressure fluctuation of the blast furnace, thereby stably operating the blast furnace. The purpose is to do.
【０００６】[0006]
【課題を解決するための手段】本発明に係る高炉の風圧
変動に伴う異常操業予知方法は、上述した目的を達成す
るためのもので、高炉側壁の高さ方向に、高炉内の圧力
を測定するための圧力測定装置を複数段設けて測定装置
群とするとともに、該測定装置群を高炉の周方向に複数
箇所設置し、前記測定装置群毎に各段の差圧を測定し、
前記差圧の時間経過に伴う変化を３次元表示し、前記３
次元表示した差圧の変化を監視することにより、操業異
常を予知することを特徴とするものである。このよう異
常操業予知方法を採用することにより、３次元表示され
た差圧の時間経過に伴う変化を監視するだけで、専門的
知識を必要とせず、また熟練した技術者の勘に頼ること
なく、安定した高炉操業を行うことができる。SUMMARY OF THE INVENTION The method of predicting abnormal operation of a blast furnace according to the present invention in order to achieve the above-mentioned object is to measure the pressure in the blast furnace in the height direction of the blast furnace side wall. A plurality of pressure measuring devices are provided for the measurement device group by providing a plurality of stages, and the measurement device group is installed at a plurality of locations in the circumferential direction of the blast furnace, and the differential pressure of each stage is measured for each of the measurement device groups,
The three-dimensional display of the change with time of the differential pressure is displayed.
The present invention is characterized in that an abnormal operation is predicted by monitoring a change in the differential pressure indicated in a three-dimensional manner. By adopting the abnormal operation prediction method as described above, it is only necessary to monitor the change with time of the three-dimensionally displayed differential pressure, without requiring specialized knowledge and without relying on the intuition of a skilled engineer. , And stable blast furnace operation can be performed.
【０００７】また、前記各測定装置群には、前記圧力測
定装置とともにステーブ温度を測定するための温度測定
装置を設け、前記測定装置群毎に各段のステーブ温度を
測定し、前記ステーブ温度の時間経過に伴う変化を３次
元表示し、前記３次元表示した差圧の変化を監視すると
ともに、前記３次元表示したステーブ温度の変化を監視
することにより、操業異常を予知することが好ましい。
このような異常操業予知方法を採用することにより、差
圧の変化とともにステーブ温度の変化も監視することが
でき、さらに確実に操業異常を予知することができる。In each of the measuring device groups, a temperature measuring device for measuring a stave temperature is provided together with the pressure measuring device, and a stave temperature of each stage is measured for each of the measuring device groups. It is preferable that the change with time is displayed three-dimensionally, the change in the differential pressure displayed three-dimensionally is monitored, and the change in the stave temperature displayed three-dimensionally is monitored, thereby predicting an abnormal operation.
By employing such an abnormal operation prediction method, it is possible to monitor a change in stave temperature as well as a change in differential pressure, and it is possible to more reliably predict an operation abnormality.
【０００８】また、前記圧力測定装置による各段の差圧
の測定では、各段の絶対圧の差を各段間の距離で除すこ
とにより基準化して差圧を求めることが好ましい。この
ような異常操業予知方法を採用することにより、差圧の
変化が基準化され、操業異常の発生をさらに容易に予知
することができる。In the measurement of the differential pressure at each stage by the pressure measuring device, it is preferable to obtain the differential pressure by dividing the absolute pressure difference at each stage by the distance between the stages to standardize. By employing such an abnormal operation prediction method, the change in the differential pressure is standardized, and the occurrence of the operation abnormality can be more easily predicted.
【０００９】[0009]
【発明の実施の形態】以下、図面に基づいて、本発明に
係る高炉の風圧変動に伴う異常操業予知方法の一実施形
態を説明する。図１は、本発明に係る異常操業予知方法
に使用する測定装置等の配置を示す説明図であり、図１
（ａ）は、高炉の縦断面を示す説明図、図１（ｂ）は、
高炉の横断面を示す説明図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a method for predicting an abnormal operation due to a wind pressure fluctuation of a blast furnace according to the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing the arrangement of measuring devices and the like used in the abnormal operation prediction method according to the present invention.
(A) is an explanatory view showing a longitudinal section of a blast furnace, and FIG.
It is explanatory drawing which shows the cross section of a blast furnace.
【００１０】高炉１の側壁には、図１（ａ）に示すよう
に、高炉１内の圧力を測定するための圧力測定装置２と
ステーブ温度を測定するための温度測定装置３とを、高
さ方向に複数段設けて測定装置群４を構成している。ま
た、この測定装置群４は、図１（ｂ）に示すように、高
炉１の周方向に複数箇所設置されている。図１に示す例
では、高炉１の高さ方向に１０個の測定装置群４を設
け、この測定装置群４を高炉１の周方向に等間隔で４カ
所設置している。また、各測定装置群４は、測定した圧
力情報および温度情報を収集して処理するための処理装
置５に接続されている。As shown in FIG. 1A, a pressure measuring device 2 for measuring the pressure in the blast furnace 1 and a temperature measuring device 3 for measuring the stave temperature are provided on the side wall of the blast furnace 1. The measuring device group 4 is configured by providing a plurality of stages in the vertical direction. Further, as shown in FIG. 1B, a plurality of the measuring device groups 4 are provided at a plurality of positions in the circumferential direction of the blast furnace 1. In the example shown in FIG. 1, ten measuring device groups 4 are provided in the height direction of the blast furnace 1, and the four measuring device groups 4 are installed at equal intervals in the circumferential direction of the blast furnace 1. Further, each measuring device group 4 is connected to a processing device 5 for collecting and processing measured pressure information and temperature information.
【００１１】この処理装置５は、例えばキーボードやマ
ウス等の入力手段と、ＣＲＴディスプレイやプリンタ等
の出力手段と、ハードディスク記憶装置等の記憶手段と
を備えたコンピュータから構成される。各測定装置群４
で測定された圧力情報および温度情報は、処理装置５に
送信されて演算処理され、３次元表示されたグラフとし
て出力される。処理装置５における演算処理では、各段
の絶対圧の差を各段間の距離で除すことにより基準化し
て差圧を求めている。The processing device 5 is composed of a computer provided with input means such as a keyboard and a mouse, output means such as a CRT display and a printer, and storage means such as a hard disk storage device. Each measuring device group 4
The pressure information and the temperature information measured in are transmitted to the processing device 5 and subjected to arithmetic processing, and are output as a three-dimensionally displayed graph. In the arithmetic processing in the processing device 5, the differential pressure is obtained by standardizing by dividing the absolute pressure difference of each stage by the distance between the stages.
【００１２】なお、各測定装置群４における圧力測定装
置２と温度測定装置３の配置個数および配置位置は、適
宜変更して実施することができる。また、各測定装置群
４において、圧力測定装置２のみ、あるいは温度測定装
置３のみを設置した箇所が存在していてもかまわない。
さらに、高炉１の周方向に設置する測定装置群４の配置
個数および配置位置も、適宜変更して実施することがで
きる。また、処理装置５は、必ずしも１つの機器により
構成する必要はなく、情報を収集する機器と、収集した
情報を処理して３次元グラフを出力する機器等のよう
に、複数の機器により構成することもできる。The number and positions of the pressure measuring devices 2 and the temperature measuring devices 3 in each of the measuring device groups 4 can be changed as appropriate. Further, in each of the measurement device groups 4, a portion where only the pressure measurement device 2 or only the temperature measurement device 3 is installed may exist.
Further, the number and positions of the measuring device groups 4 installed in the circumferential direction of the blast furnace 1 can be changed as appropriate and implemented. The processing device 5 does not necessarily need to be configured by one device, but is configured by a plurality of devices such as a device that collects information and a device that processes the collected information and outputs a three-dimensional graph. You can also.
【００１３】処理装置５により出力された３次元グラフ
を、図２に基づいて説明する。図２は、測定した情報の
時間経過に伴う変化を３次元表示したグラフで、図２
（ａ）は、差圧の３次元グラフ、図２（ｂ）はステーブ
温度の３次元グラフである。図２（ａ）に示す例は、２
７０度方向に設置された測定装置群４における差圧の測
定結果を表したもので、横軸に時間、縦軸に差圧をと
り、時間経過に伴う差圧の変化を示している。The three-dimensional graph output by the processing device 5 will be described with reference to FIG. FIG. 2 is a graph showing a three-dimensional display of a change over time of the measured information.
(A) is a three-dimensional graph of differential pressure, and FIG. 2 (b) is a three-dimensional graph of stave temperature. The example shown in FIG.
It shows the measurement result of the differential pressure in the measuring device group 4 installed in the 70-degree direction, in which the horizontal axis represents time and the vertical axis represents the differential pressure, and the change of the differential pressure over time is shown.
【００１４】横軸に示す（i）〜（iii）は日にちを表
し、１２００，１４００等の数字は時刻を表している。
縦軸に示すＢＰ〜Ｂ３，Ｓ１〜Ｓ５，ＴＰは、測定装置
群４における圧力測定装置２の設置位置を表し、下方か
ら上方に向かって、ＢＰ，Ｂ２，Ｂ３，Ｓ１，Ｓ３，Ｓ
５，ＴＰの順に設置されている。したがって、例えばＳ
５−ＴＰとは、ＴＰとＳ５との差圧であり、Ｓ３−Ｓ５
とは、Ｓ５とＳ３との差圧のことである。また、差圧
は、図２（ａ）中に示すように、０．００〜０．２５ｋ
ｇ／ｃｍ３の範囲で０．０５ｋｇ／ｃｍ３毎に区別して
表示されている。(I) to (iii) shown on the horizontal axis represent dates, and numerals such as 1200 and 1400 represent time.
BP to B3, S1 to S5, and TP shown on the vertical axis indicate the installation positions of the pressure measurement devices 2 in the measurement device group 4, and BP, B2, B3, S1, S3, S
5 and TP. Thus, for example, S
5-TP is the differential pressure between TP and S5, and S3-S5
Is the pressure difference between S5 and S3. Also, as shown in FIG. 2A, the differential pressure is 0.00 to 0.25 k.
In the range of g / cm 3 , the values are separately displayed every 0.05 kg / cm 3 .
【００１５】同様に、図２（ｂ）に示す例は、２７０度
方向に設置された測定装置群４におけるステーブ温度の
測定結果を表したもので、横軸に時間、縦軸にステーブ
温度をとり、時間経過に伴う差圧の変化を示している。
横軸に示す（i）〜（iii）は日にちを表し、１２００，
１４００等の数字は時刻を表している。縦軸に示すＢ１
Ｌ〜Ｂ３Ｕ，Ｓ１〜Ｓ５は、測定装置群４における温度
測定装置３の設置位置を表し、下方から上方に向かっ
て、Ｂ１Ｌ，Ｂ１Ｕ，Ｂ２Ｌ，Ｂ２Ｕ，Ｂ３Ｌ，Ｂ３
Ｕ，Ｓ１，Ｓ２，Ｓ３，Ｓ４，Ｓ５の順に設置されてい
る。また、ステーブ温度は、図２（ｂ）中に示すよう
に、０〜５００℃の範囲で１００℃毎に区別して表示さ
れている。なお、図２（ａ）（ｂ）において、縦の破線
の位置において、吹き抜け現象が発生している。Similarly, the example shown in FIG. 2B shows the measurement result of the stave temperature in the measuring device group 4 installed in the 270 degree direction. The horizontal axis represents time, and the vertical axis represents stave temperature. 9 shows the change in the differential pressure over time.
(I) to (iii) shown on the horizontal axis represent dates, 1200,
A number such as 1400 represents time. B1 shown on the vertical axis
L to B3U and S1 to S5 represent the installation positions of the temperature measurement devices 3 in the measurement device group 4, and B1L, B1U, B2L, B2U, B3L, B3 from the bottom to the top.
U, S1, S2, S3, S4, and S5 are installed in this order. Further, as shown in FIG. 2 (b), the stave temperature is displayed in a range of 0 to 500 ° C. and is distinguished every 100 ° C. In FIGS. 2A and 2B, a blow-by phenomenon occurs at a position indicated by a vertical broken line.
【００１６】図２（ａ）（ｂ）の３次元グラフによれ
ば、（ii）日目の１７時３０分頃に吹き抜け現象が発生
しており、Ｂ２−Ｂ３間の差圧が極端に上昇している。
また、この吹き抜け現象が発生する以前に、（ii）日目
の１０時３０分頃からＢ２−Ｂ３間の差圧が上昇してお
り、特に（ii）日目の１３時３０分頃と１４時３０分頃
にＢ２−Ｂ３間の差圧が極端に上昇している。これに対
応して、（ii）日目の１１時頃からＢ２Ｕのステーブ温
度が上昇しており、特に（ii）日目の１３時頃にＢ２Ｕ
のステーブ温度が極端に上昇している。また、同様の現
象が（i）日目の６時頃にも発生している。According to the three-dimensional graphs of FIGS. 2A and 2B, a blow-through phenomenon occurs at about 17:30 on the second day, and the pressure difference between B2 and B3 rises extremely. are doing.
Further, before the occurrence of the blow-by phenomenon, the differential pressure between B2 and B3 increases at about 10:30 on the (ii) day, and particularly at about 13:30 on the (ii) day. At around 30:30, the pressure difference between B2 and B3 has risen extremely. Correspondingly, the stave temperature of B2U has increased since about 11:00 on (ii) day, and especially at about 13:00 on (ii) day.
Stave temperature has risen extremely. A similar phenomenon also occurs at about 6:00 on day (i).
【００１７】上述したように、図２（ａ）（ｂ）の３次
元グラフに基づく分析結果を総合的に判断すると、Ｂ２
レベルにおいて、例えば羽口直上で温度は高いが、鉱石
の軟化により通気性の悪い層、すなわち融着帯が何らか
の要因で降下停滞を起こして停滞層となり、この停滞層
が時間の経過とともに部分的に崩壊したり、部分的に空
洞を生じたりして、この部分を高速のガスが通過するこ
とにより吹き抜け現象を誘発したことが推測される。た
だし、図示しないが、２７０度方向以外では変化が見ら
れないので、局所的な降下停滞と考えることができる。As described above, when the analysis results based on the three-dimensional graphs of FIGS. 2A and 2B are comprehensively determined, B2
At the level, for example, the temperature is high just above the tuyere, but the layer with poor air permeability due to the softening of the ore, that is, the cohesive zone falls and stagnates for some reason and becomes a stagnation layer, and this stagnation layer partially becomes over time. It is presumed that the gas collapsed or partially formed a cavity, and a high-speed gas passed through this portion to induce a blow-by phenomenon. However, although not shown, there is no change except in the 270 degree direction, so it can be considered as a local descent stagnation.
【００１８】このような停滞層が生じる原因が、高炉１
操業の限界を示唆していると考えられる。上述した例で
は、羽口近傍の熱レベルとガス分布、鉱石の還元、融け
落ち能の整合性が取れないことが原因であると推測する
ことができ、高炉全体の熱還元バランスは取れていて
も、部分的な非整合が生じると破綻を来す例と考えるこ
とができる。また、図２（ａ）に示す例では、２７０度
方向の各段毎に差圧が周期的に変動している。このよう
な１０時間以上の周期的な差圧変動は、原料の装入や操
業変更の影響と推定することができる。The cause of such a stagnant layer is that the blast furnace 1
It is considered to indicate the limitation of operation. In the above example, it can be assumed that the cause is that the heat level near the tuyere and the gas distribution, the reduction of ore, and the ability to burn down are not consistent, and the heat reduction balance of the entire blast furnace is balanced. However, it can be considered as an example that a failure occurs when a partial mismatch occurs. In the example shown in FIG. 2A, the differential pressure periodically fluctuates at each stage in the 270 degree direction. Such a periodic pressure fluctuation of 10 hours or more can be presumed to be the influence of the charging of the raw material or the change in the operation.
【００１９】上述したような３次元グラフの変化は、専
門的な知識や、長年の経験を持たない者であっても容易
に読みとることができる。したがって、このような３次
元グラフの変化に基づいて異常操業を予知して、吹き抜
け現象が発生する原因を除去することにより、安定した
高炉操業を行うことができる。なお、上述した図２に示
す例において吹き抜け現象が発生しているが、これは、
本発明に係る異常操業予知方法を説明するためであり、
本発明に係る異常操業予知方法では、実際に吹き抜け現
象が発生する以前に、その原因を除去することにより吹
き抜け現象の発生を未然に防ぐことができる。The change of the three-dimensional graph as described above can be easily read even by a person who does not have specialized knowledge or years of experience. Therefore, a stable blast furnace operation can be performed by predicting an abnormal operation based on such a change in the three-dimensional graph and removing the cause of the blow-by phenomenon. The blow-by phenomenon occurs in the example shown in FIG. 2 described above.
In order to explain the abnormal operation prediction method according to the present invention,
In the abnormal operation prediction method according to the present invention, it is possible to prevent the occurrence of the blow-by phenomenon by removing the cause before the blow-by phenomenon actually occurs.
【００２０】[0020]
【発明の効果】本発明に係る高炉の風圧変動に伴う操業
異常予知方法は、上記した構成を有するので、以下に示
すような効果を奏することができる。すなわち、本発明
に係る高炉の風圧変動に伴う操業異常予知方法では、高
炉の高さ方向に複数段にわたって設けた圧力測定装置に
より高炉内の圧力を測定し、各段の差圧の時間経過に伴
う変化を３次元表示して、差圧の変化を監視している。
したがって、差圧の変化を３次元表示することにより、
差圧の変化を一目で認識することができるので、専門的
知識を必要とせず、また熟練した技術者の勘に頼ること
なく、安定した高炉操業を行うことができる。The method for predicting an abnormality in operation of a blast furnace according to the present invention having the above-mentioned structure has the following effects. That is, in the method for predicting an abnormal operation due to the wind pressure fluctuation of the blast furnace according to the present invention, the pressure in the blast furnace is measured by a pressure measuring device provided over a plurality of stages in the height direction of the blast furnace, and the time of the differential pressure of each stage is measured. The accompanying change is three-dimensionally displayed to monitor the change in the differential pressure.
Therefore, by displaying the change of the differential pressure in three dimensions,
Since the change in differential pressure can be recognized at a glance, stable blast furnace operation can be performed without requiring specialized knowledge and without relying on the intuition of a skilled engineer.
【００２１】また、ステーブ温度を測定するための温度
測定装置を設け、各段のステーブ温度の時間経過に伴う
変化を３次元表示して、ステーブ温度の変化を監視して
いる。したがって、差圧の変化を監視するだけではなく
ステーブ温度の変化も監視しているので、さらに確実に
操業異常を予知することができる。Further, a temperature measuring device for measuring the stave temperature is provided, and the change with time of the stave temperature of each stage is three-dimensionally displayed to monitor the stave temperature change. Therefore, since not only the change in the differential pressure but also the change in the stave temperature is monitored, it is possible to more reliably predict the operation abnormality.
【００２２】また、圧力測定装置による各段の差圧の測
定では、各段の絶対圧の差を各段間の距離で除すことに
より基準化して差圧を求めている。したがって、操業異
常の発生をさらに容易に予知することができる。In the measurement of the differential pressure at each stage by the pressure measuring device, the differential pressure is obtained by dividing the absolute pressure difference at each stage by the distance between the stages. Therefore, the occurrence of the operation abnormality can be more easily predicted.
【図１】本発明に係る異常操業予知方法に使用する測定
装置等の配置を示す説明図であり、（ａ）は、高炉の縦
断面を示す説明図、（ｂ）は、高炉の横断面を示す説明
図である。FIG. 1 is an explanatory view showing an arrangement of a measuring device and the like used in the abnormal operation prediction method according to the present invention, wherein (a) is an explanatory view showing a longitudinal section of a blast furnace, and (b) is a transverse section of the blast furnace. FIG.
【図２】測定した情報の時間経過に伴う変化を３次元表
示したグラフで、（ａ）は、差圧の３次元グラフ、
（ｂ）はステーブ温度の３次元グラフである。FIG. 2 is a graph showing a three-dimensional display of a change over time of measured information, wherein (a) is a three-dimensional graph of differential pressure;
(B) is a three-dimensional graph of the stave temperature.
１ 高炉 ２ 圧力測定装置 ３ 温度測定装置 ４ 測定装置群 ５ 処理装置 Reference Signs List 1 blast furnace 2 pressure measuring device 3 temperature measuring device 4 measuring device group 5 processing device
Claims (3)
定するための圧力測定装置を複数段設けて測定装置群と
するとともに、該測定装置群を高炉の周方向に複数箇所
設置し、 前記測定装置群毎に各段の差圧を測定し、 前記差圧の時間経過に伴う変化を３次元表示し、 前記３次元表示した差圧の変化を監視することにより、
操業異常を予知することを特徴とする高炉の風圧変動に
伴う操業異常予知方法。1. A plurality of pressure measuring devices for measuring the pressure inside a blast furnace are provided in a height direction of a side wall of a blast furnace to form a group of measuring devices, and the measuring device groups are installed at a plurality of locations in a circumferential direction of the blast furnace. By measuring the differential pressure of each stage for each of the measuring device groups, three-dimensionally displaying a change with time of the differential pressure, and monitoring a change in the three-dimensionally displayed differential pressure,
A method for predicting an operation abnormality due to a wind pressure fluctuation of a blast furnace, which is characterized by predicting an operation abnormality.
とともにステーブ温度を測定するための温度測定装置を
設け、 前記測定装置群毎に各段のステーブ温度を測定し、 前記ステーブ温度の時間経過に伴う変化を３次元表示
し、 前記３次元表示した差圧の変化を監視するとともに、前
記３次元表示したステーブ温度の変化を監視することに
より、操業異常を予知することを特徴とする請求項１記
載の高炉の風圧変動に伴う操業異常予知方法。2. A temperature measuring device for measuring a stave temperature together with the pressure measuring device is provided in each of the measuring device groups; a stave temperature of each stage is measured for each of the measuring device groups; A change with time is displayed three-dimensionally, and a change in the differential pressure displayed in the three-dimensional manner is monitored, and a change in the stave temperature displayed in the three-dimensional manner is monitored to predict an abnormal operation. The method for predicting an operation abnormality associated with wind pressure fluctuations of a blast furnace according to claim 1.
では、各段の絶対圧の差を各段間の距離で除すことによ
り基準化して差圧を求めることを特徴とする請求項１ま
たは２記載の高炉の風圧変動に伴う操業異常予知方法。3. The differential pressure measurement of each stage by the pressure measuring device, wherein the differential pressure is determined by dividing the absolute pressure difference of each stage by the distance between the stages. Item 3. The method for predicting an operation abnormality associated with a blast furnace wind pressure fluctuation according to item 1 or 2.
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| JP2000309953A JP3938658B2 (en) | 2000-10-10 | 2000-10-10 | A method for predicting blow-through phenomena associated with blast furnace wind pressure fluctuations. |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101267692B1 (en) | 2011-06-29 | 2013-05-27 | 현대제철 주식회사 | Method for controlling and prejudgement of blowing pressure in blast furnace |
| KR101321926B1 (en) | 2011-12-07 | 2013-10-28 | 주식회사 포스코 | Method for calculating fluctuation of gas flow in furnace |
| JP2018009224A (en) * | 2016-07-14 | 2018-01-18 | 株式会社神戸製鋼所 | Operation condition evaluation system |
| JP2020169385A (en) * | 2019-04-04 | 2020-10-15 | 日本製鉄株式会社 | Method for detecting fluctuation of gas pressure in furnace |
-
2000
- 2000-10-10 JP JP2000309953A patent/JP3938658B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101267692B1 (en) | 2011-06-29 | 2013-05-27 | 현대제철 주식회사 | Method for controlling and prejudgement of blowing pressure in blast furnace |
| KR101321926B1 (en) | 2011-12-07 | 2013-10-28 | 주식회사 포스코 | Method for calculating fluctuation of gas flow in furnace |
| JP2018009224A (en) * | 2016-07-14 | 2018-01-18 | 株式会社神戸製鋼所 | Operation condition evaluation system |
| JP2020169385A (en) * | 2019-04-04 | 2020-10-15 | 日本製鉄株式会社 | Method for detecting fluctuation of gas pressure in furnace |
| JP7307341B2 (en) | 2019-04-04 | 2023-07-12 | 日本製鉄株式会社 | Furnace gas pressure fluctuation detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3938658B2 (en) | 2007-06-27 |
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