JPH05186811A - Method for operating blast furnace - Google Patents
Method for operating blast furnaceInfo
- Publication number
- JPH05186811A JPH05186811A JP5324891A JP5324891A JPH05186811A JP H05186811 A JPH05186811 A JP H05186811A JP 5324891 A JP5324891 A JP 5324891A JP 5324891 A JP5324891 A JP 5324891A JP H05186811 A JPH05186811 A JP H05186811A
- Authority
- JP
- Japan
- Prior art keywords
- ore
- blast furnace
- furnace
- minutes
- drops
- 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.)
- Withdrawn
Links
Landscapes
- Manufacture Of Iron (AREA)
- Blast Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高炉の羽口部で未溶融
鉱石の上方より落下頻度を検出し、炉頂装入物分布を調
整することにより生産性を向上させ、燃料比を低下させ
た高炉操業法に関する。BACKGROUND OF THE INVENTION The present invention detects the drop frequency of unmelted ore at the tuyere of a blast furnace and adjusts the distribution of the top charge to improve productivity and lower the fuel ratio. Blast furnace operation method.
【０００２】[0002]
【従来の技術】高炉操業にあたっては、炉頂から装入す
る鉱石とコークスの比率（０／Ｃと略す）の半径方向分
布を調整することにより、高炉の通気性を確保して生産
性を向上させ、かつガス還元効率の向上をはかり燃料比
を低下させている。この装入物分布調整にあたり、炉内
の装入物降下が安定することは非常に重要であり、とく
に周辺部の装入物降下安定は高炉の通気性、還元効率を
ほぼ決定するので、従来から周辺部の降下速度検出方法
が開発され実用化されている。例えば、特公昭５７−３
１１０４号公報では、鉄鉱石とコークスの電気抵抗の差
を利用した２本のゾンデによる装入物降下速度検出方法
が開示されている。2. Description of the Related Art In operating a blast furnace, by adjusting the radial distribution of the ratio of ore and coke (abbreviated as 0 / C) charged from the top of the furnace, air permeability of the blast furnace is secured and productivity is improved. In addition, the fuel ratio is reduced by improving the gas reduction efficiency. In adjusting the distribution of the charge, it is very important that the drop of the charge in the furnace is stable, and especially the stability of the drop of the charge in the peripheral area determines the permeability and reduction efficiency of the blast furnace. Therefore, the method of detecting the descent rate in the peripheral area has been developed and put into practical use. For example, Japanese Patent Publication Sho 57-3
Japanese Laid-Open Patent Publication No. 1104 discloses a charging descent rate detecting method using two sondes, which utilizes a difference in electric resistance between iron ore and coke.
【０００３】[0003]
【発明が解決しようとする課題】ところで従来の高炉操
業において、特公昭５７−３１１０４号公報に開示され
ている装入物降下速度検出方法をはじめ、開発され実用
化されている検出方法の測定位置は炉頂装入物表面より
５ｍ程度までの低温領域にかぎられている。この理由
は、炉下部の高温領域になると、電気抵抗の差を利用し
た場合は鉄鉱石とコークスの抵抗差がなくなり、原理的
に検出不可能であるとともにセンサーを搭載するゾンデ
の耐熱性に限界があり、長期的に安定稼働できないこと
による。By the way, in the conventional blast furnace operation, the measuring position of the detecting method which has been developed and put into practical use, including the charging descent rate detecting method disclosed in Japanese Patent Publication No. 57-31104. Is limited to the low temperature region up to about 5 m from the surface of the furnace top charge. The reason for this is that in the high temperature region of the lower part of the furnace, when the difference in electrical resistance is used, there is no difference in resistance between the iron ore and the coke, which cannot be detected in principle and the heat resistance of the sonde equipped with a sensor is limited. However, due to the inability to operate stably over the long term.
【０００４】しかし、装入物の降下性は炉下部における
検出が重要であり、炉頂部における装入物降下速度より
炉下部の装入物降下性を推定することは、この間に５か
ら６時間のタイムラグがあることや、炉頂部で周辺部に
装入された鉄鉱石とコークスがそのままピストンフロー
で炉壁部を降下するとは限らず、検出精度が悪く、それ
を用いた装入物分布制御による生産性向上、燃料比低下
には限界があった。However, it is important to detect the fallability of the charging material in the lower part of the furnace, and it is necessary to estimate the falling property of the charging material in the lower part of the furnace from the falling rate of the charging material in the top part of the furnace for 5 to 6 hours. There is a time lag, and the iron ore and coke charged in the peripheral area at the top of the furnace do not always move down the furnace wall by the piston flow, and the detection accuracy is poor. There was a limit to the improvement of productivity and the reduction of fuel ratio.
【０００５】このように従来の高炉操業は、生産性向
上、燃料比低下をはかろうとしたときに炉下部を検出す
る精度よい測定手段がないため、装入物分布制御技術が
有効に活用されていない。そこで本発明は、炉下部にお
ける装入物降下性の指標である、羽口部での未溶融鉱石
の上方よりの降下頻度を直接検出し、それを用いて装入
物分布制御を行なうことにより、生産性向上、燃料比低
下を達成することを目的とする。As described above, in the conventional blast furnace operation, since there is no accurate measuring means for detecting the lower part of the furnace when it is attempted to improve productivity and lower the fuel ratio, the charge distribution control technology is effectively utilized. Not not. Therefore, the present invention is a measure of the fallability of the charge in the lower part of the furnace, the direct detection of the descent frequency of the unmelted ore at the tuyere from above, and by using it to perform the charge distribution control. The goal is to improve productivity and reduce fuel ratio.
【０００６】[0006]
【課題を解決するための手段】本発明の高炉操業法はそ
の目的を達成するために、羽口部で未溶融鉱石の上方よ
りの降下回数をかぞえ、該落下回数があらかじめ設定し
た基準値以下になるように、炉頂から装入する周辺部の
鉱石とコークスの比率を調整することを特徴とする。In order to achieve the object, the blast furnace operating method of the present invention counts the number of times the unmelted ore descends from the tuyere, and the number of drops is less than a preset reference value. The ratio of ore and coke in the peripheral part charged from the furnace top is adjusted so that
【０００７】[0007]
【作用】本発明における高炉の羽口部での未溶融鉱石の
上方よりの落下頻度の検出方法を図１に示す。図１にお
いて、１は高炉鉄皮、２はレンガ、３は羽口、４は送風
支管、５はカメラ、６はモニター、７はレースウエーイ
を示す。カメラを介してモニター上に映し出された映像
を観察すると、黒色団塊状の未溶融鉱石が上方より落下
してくる状態が検出できるので、モニター上でその落下
回数を数えることができる。FIG. 1 shows a method of detecting the frequency of unmelted ore falling from above at the tuyere of the blast furnace according to the present invention. In FIG. 1, 1 is a blast furnace iron skin, 2 is a brick, 3 is a tuyere, 4 is a blast branch pipe, 5 is a camera, 6 is a monitor, and 7 is a raceway. By observing the image displayed on the monitor through the camera, it is possible to detect the state in which the black nodular unmelted ore is falling from above, and therefore the number of times of falling can be counted on the monitor.
【０００８】また本発明における、高炉の羽口部での未
溶融鉱石の上方よりの落下頻度のもう一つの検出方法を
図２に示す。図２において、８は輝度計、９は信号処理
装置を示す。図１におけるモニター上の映像と、図２に
おける輝度計の信号を比較すると、黒色団塊状の未溶融
鉱石が上方より落下してくるときは、羽口部の輝度が大
幅に低下し、両者は１：１の対応が取れる。よって信号
処理装置により、輝度の低下回数をカウントでき、この
値が未溶融鉱石の上方よりの落下回数となる。FIG. 2 shows another method for detecting the frequency of unmelted ore falling from above at the tuyere of the blast furnace according to the present invention. In FIG. 2, 8 is a luminance meter and 9 is a signal processing device. Comparing the image on the monitor in Fig. 1 with the signal from the luminance meter in Fig. 2, when the black nodule-shaped unmelted ore falls from above, the luminance of the tuyere drops significantly, and both 1: 1 correspondence can be taken. Therefore, the signal processing device can count the number of times of decrease in brightness, and this value becomes the number of times the unmelted ore drops from above.
【０００９】図１または図２の方法により、未溶融鉱石
の上方よりの落下回数を数え、３０分当たりの落下回数
を周辺部の装入物降下性を表す指標とした。この値と周
辺部０／Ｃの対応を操業試験によって調査すると図３が
得られた。図３において周辺部の０／Ｃは、装入物表面
の位置を検出する検尺計を用い、鉄鉱石およびコークス
の装入前後の層厚を測定し、これに鉄鉱石とコークスの
嵩密度１８５０ｋｇ／立方メートル、５００ｋｇ／立方
メートルを乗じて、重量に換算して求めたものである。
ここでいう周辺部とは、炉壁より５００ｍｍ程度炉内に
入った位置を示す。図３のよると、周辺部の０／Ｃが増
加するほど、未溶融鉱石の落下回数は増加している。According to the method shown in FIG. 1 or 2, the number of drops of unmelted ore from above was counted, and the number of drops per 30 minutes was used as an index showing the fallability of the charged material in the peripheral portion. When the correspondence between this value and 0 / C in the peripheral portion was investigated by an operation test, FIG. 3 was obtained. In Fig. 3, 0 / C in the peripheral portion is a layer thickness before and after the charging of the iron ore and the coke is measured by using a scale to detect the position of the surface of the charged material, and the bulk density of the iron ore and the coke is measured. It is obtained by multiplying 1850 kg / cubic meter and 500 kg / cubic meter and converting into weight.
The peripheral portion referred to here means a position that enters the furnace by about 500 mm from the furnace wall. According to FIG. 3, the number of unmelted ores falling increases as 0 / C in the peripheral portion increases.
【００１０】一方、図４は、図３と同じ期間の、未溶融
鉱石の落下回数と送風圧力の変動（標準偏差）の関係を
示すが、未溶融鉱石の落下回数が増加するほど送風圧力
の変動が大きくなっている。送風圧力の変動が３０ｇ／
平方センチメートル未満のとき、高炉操業が安定である
ことが従来の解析結果から判明しているので、図４よ
り、未溶融鉱石の落下回数を２０回／３０分以下に抑え
ることが高炉操業安定の条件となる。On the other hand, FIG. 4 shows the relationship between the number of drops of unmelted ore and the fluctuation (standard deviation) of the blast pressure during the same period as in FIG. Fluctuations are increasing. Fluctuation of blast pressure is 30g /
It is known from the conventional analysis results that the blast furnace operation is stable when it is less than a square centimeter. Therefore, from FIG. 4, it is a condition for stabilizing the blast furnace operation that the number of unmelted ore drops is 20 times / 30 minutes or less. Becomes
【００１１】図３のグラフを加工することにより、未溶
融鉱石の落下回数の変化量と周辺部の０／Ｃの変化量の
関係を求めることができ、それを図５に示す。高炉の羽
口部で未溶融鉱石の上方よりの落下回数を数え、３０分
当たりの落下回数の指標を計算し、落下回数が基準値
（２０回／３０分）を超えたとき、図５を用いて、基準
値からの変化量に対する基準値に戻すための周辺部０／
Ｃの変化量を求め、周辺部０／Ｃを調整することによ
り、高炉操業が安定し、生産性向上、燃料比低下を達成
することができる。By processing the graph of FIG. 3, the relationship between the amount of change in the number of drops of unmelted ore and the amount of change in 0 / C in the peripheral portion can be obtained, which is shown in FIG. The number of drops from above the unmelted ore was counted at the tuyere of the blast furnace, the index of the number of drops per 30 minutes was calculated, and when the number of drops exceeded the reference value (20 times / 30 minutes), the result shown in FIG. Using the peripheral part 0 / for returning to the reference value for the amount of change from the reference value
By obtaining the amount of change in C and adjusting the peripheral portion 0 / C, it is possible to stabilize blast furnace operation, improve productivity, and reduce the fuel ratio.
【００１２】未溶融鉱石の落下回数の基準値を２０回／
３０分としたが、この基準値は、ある高炉の好調な操業
状態のときを参考にして、炉別に定めることができる。
また周辺部の０／Ｃの変化量についても、当該炉の操業
試験等を実施して炉別に定めることができる。また、図
１または図２の検出装置は、円周方向にできるだけ多く
設置するほうが効果が大きいが、最低円周方向３箇所に
設置することが望ましい。また検出装置を円周方向可働
式とすることもできる。The standard value of the number of times unmelted ore falls is 20 times /
Although it is set to 30 minutes, this reference value can be determined for each furnace by referring to the time when a certain blast furnace is in a good operating state.
The amount of change in 0 / C in the peripheral portion can also be determined for each furnace by performing an operation test of the furnace. Further, the detection apparatus of FIG. 1 or FIG. 2 is more effective if it is installed in the circumferential direction as much as possible, but it is desirable to install the detection apparatus at the lowest three circumferential positions. It is also possible for the detection device to be circumferentially movable.
【００１３】[0013]
【実施例】以下実施例により本発明の特徴を具体的に説
明する。表１に操業結果を示す。EXAMPLES The features of the present invention will be specifically described with reference to the following examples. Table 1 shows the operation results.
【表１】 実施例１ 図１に示す未溶融鉱石の落下回数検出装置を円周方向３
箇所に設置し、未溶融鉱石の上方よりの落下回数を数
え、３０分当たりの落下回数を計算し、円周方向３箇所
の平均値を算出すると、１０から１８回／３０分の範囲
を推移していた。周辺部の０／Ｃは５．０から６．０の
範囲にあった。[Table 1] Example 1 The unmelted ore falling number detection device shown in FIG.
It is installed in a place, the number of drops from above the unmelted ore is counted, the number of drops per 30 minutes is calculated, and the average value of 3 places in the circumferential direction is calculated, and the range is 10 to 18 times / 30 minutes. Was. The peripheral 0 / C was in the range of 5.0 to 6.0.
【００１４】未溶融鉱石の落下回数の基準値を２０回／
３０分としていたが、２５回／３０分と基準値を５回／
３０分だけ超えたので、図５にしたがって、周辺部０／
Ｃを０．６０低下させ（５．０から６．０を４．４から
５．４）、８時間経過したら、もとの１５回／３０分に
戻ったので、周辺部０／Ｃをもとに戻した操業例であ
る。The reference value of the number of times the unmelted ore falls is 20 times /
It was 30 minutes, but 25 times / 30 minutes and the standard value was 5 times /
Since it has exceeded 30 minutes, the peripheral part 0 /
C was decreased by 0.60 (5.0 to 6.0 was changed from 4.4 to 5.4), and after 8 hours, it returned to the original 15 times / 30 minutes. This is an example of operation returned to and.
【００１５】実施例２ 図２に示す未溶融鉱石の落下回数検出装置を円周方向４
箇所に設置し、未溶融鉱石の上方よりの落下回数を数
え、３０分当たりの落下回数を計算し、円周方向４箇所
の平均値を算出すると、８から１５回／３０分の範囲を
推移していた。周辺部の０／Ｃは４．８から５．６の範
囲にあった。Example 2 A device for detecting the number of drops of unmelted ore shown in FIG.
It is installed in a place, the number of drops from above the unmelted ore is counted, the number of drops per 30 minutes is calculated, and the average value of 4 places in the circumferential direction is calculated, and the range is 8 to 15 times / 30 minutes. Was. The peripheral 0 / C was in the range of 4.8 to 5.6.
【００１６】未溶融鉱石の落下回数の基準値を２０回／
３０分としていたが、３０回／３０分と基準値を１０回
／３０分だけ超えたので、図５にしたがって、周辺部０
／Ｃを１．２０低下させ（４．８から５．６を３．６か
ら４．４）、１６時間経過したらもとの１２回／３０分
に戻ったので、周辺部０／Ｃをもとに戻した操業例であ
る。The reference value of the number of times the unmelted ore falls is 20 times /
Although it was set to 30 minutes, it was 30 times / 30 minutes, which exceeded the reference value by 10 times / 30 minutes.
/ C was reduced by 1.20 (4.8 to 5.6 was changed from 3.6 to 4.4), and after 16 hours, it returned to the original 12 times / 30 minutes, so the peripheral part 0 / C was also This is an example of operation returned to and.
【００１７】実施例３ 図１に示す未溶融鉱石の落下回数検出装置を、円周方向
可働式とし、円周方向８箇所の未溶融鉱石の上方よりの
落下回数を数え、３０分当たりの落下回数を計算し、円
周方向８箇所の平均値を算出すると、１２から１９回／
３０分の範囲を推移していた。周辺部の０／Ｃは５．２
から６．１の範囲にあった。Example 3 The unmelted ore falling number detecting device shown in FIG. 1 is of a movable type in the circumferential direction, and the number of times the unmelted ore is dropped from above at eight points in the circumferential direction is counted, When the number of drops is calculated and the average value of 8 points in the circumferential direction is calculated, it is 12 to 19 times /
It was in the range of 30 minutes. Peripheral 0 / C is 5.2
It was in the range from to 6.1.
【００１８】未溶融鉱石の落下回数の基準値を２０回／
３０分としていたが、２８回／３０分と基準値を８回／
３０分だけ超えたので、図５にしたがって、周辺部０／
Ｃを１．００低下させ（５．２から６．１を４．２から
５．１）、１３時間経過したらもとの１７回／３０分に
戻ったので、周辺部０／Ｃをもとに戻した操業例であ
る。いずれの場合も、比較例に対比すると、出鉄量が多
く、燃料比が低くなっている。比較例は未溶融鉱石の落
下回数検出装置がないため、高炉に通気性が悪化したと
きに周辺部の０／Ｃ、全体の０／Ｃの調整を行なった操
業例である。実施例１から３に比べると、出鉄量が少な
く、燃料比が高い。The reference value of the number of times the unmelted ore falls is 20 times /
It was 30 minutes, but 28 times / 30 minutes and the standard value was 8 times /
Since it has exceeded 30 minutes, the peripheral part 0 /
C was lowered by 1.00 (from 5.2 to 6.1 from 4.2 to 5.1), and after 13 hours, it returned to the original 17 times / 30 minutes. It is an example of the operation returned to. In any case, the iron output is large and the fuel ratio is low as compared with the comparative example. The comparative example is an operation example in which 0 / C of the peripheral portion and 0 / C of the entire portion were adjusted when the air permeability of the blast furnace was deteriorated because there was no device for detecting the number of unmelted ore drops. Compared with Examples 1 to 3, the iron output is small and the fuel ratio is high.
【００１９】[0019]
【発明の効果】以上説明したように、本発明において、
高炉の羽口部で未溶融鉱石の落下頻度を検出し、その頻
度が基準値以下になるように炉頂装入物分布を調整する
ことにより、装入物降下が安定するため高炉が安定的に
稼働し、生産性向上、燃料比低下をはかることができ、
安定した溶鉄供給が可能である。As described above, in the present invention,
By detecting the frequency of unmelted ore falling at the tuyere of the blast furnace and adjusting the distribution of the top charge so that the frequency falls below the reference value, the blast furnace is stable because the charge fall is stable. To improve productivity and reduce fuel ratio,
A stable supply of molten iron is possible.
【図１】高炉の羽口部で未溶融鉱石の落下頻度を検出す
る方法を示す図FIG. 1 is a diagram showing a method of detecting the falling frequency of unmelted ore at the tuyere of a blast furnace.
【図２】高炉の羽口部で未溶融鉱石の落下頻度を検出す
る他の方法を示す図FIG. 2 is a diagram showing another method for detecting the falling frequency of unmelted ore at the tuyere of the blast furnace.
【図３】周辺部０／Ｃと未溶融鉱石の落下回数（回／３
０分）の関係を示す図[Fig. 3] Number of falls of peripheral part 0 / C and unmelted ore (times / 3
Diagram showing the relationship of 0 minutes)
【図４】未溶融鉱石の落下回数（回／３０分）と送風圧
力の変動の関係を示す図FIG. 4 is a diagram showing the relationship between the number of drops of unmelted ore (times / 30 minutes) and the fluctuation of blast pressure.
【図５】本発明の高炉操業法で使用する、未溶融鉱石の
落下回数の変化量と周辺部の０／Ｃの変化量の関係を示
す図FIG. 5 is a diagram showing the relationship between the amount of change in the number of drops of unmelted ore and the amount of change in 0 / C in the peripheral portion, which is used in the blast furnace operation method of the present invention.
Claims (1)
数を数え、該落下回数があらかじめ設定した基準値以下
になるように、炉頂から装入する周辺部の鉱石とコーク
スの比率を調整することを特徴とする高炉操業法。1. The ratio of ore and coke in the peripheral portion charged from the furnace top so that the number of drops of unmelted ore from above is counted at the tuyere, and the number of drops falls below a preset reference value. Blast furnace operating method characterized by adjusting the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5324891A JPH05186811A (en) | 1991-02-26 | 1991-02-26 | Method for operating blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5324891A JPH05186811A (en) | 1991-02-26 | 1991-02-26 | Method for operating blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05186811A true JPH05186811A (en) | 1993-07-27 |
Family
ID=12937494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5324891A Withdrawn JPH05186811A (en) | 1991-02-26 | 1991-02-26 | Method for operating blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05186811A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014203509A1 (en) | 2013-06-19 | 2014-12-24 | Ｊｆｅスチール株式会社 | Method for detecting abnormality in blast furnace, and method for operating blast furnace |
| JP2015025199A (en) * | 2013-06-19 | 2015-02-05 | Ｊｆｅスチール株式会社 | Unmelted ore detection method and blast furnace operation method |
| WO2015015936A1 (en) | 2013-07-29 | 2015-02-05 | Ｊｆｅスチール株式会社 | Abnormality detection method and blast-furnace operation method |
| JP2015052148A (en) * | 2013-09-06 | 2015-03-19 | 新日鐵住金株式会社 | Method for controlling blast furnace by determining operational situation thereof |
-
1991
- 1991-02-26 JP JP5324891A patent/JPH05186811A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014203509A1 (en) | 2013-06-19 | 2014-12-24 | Ｊｆｅスチール株式会社 | Method for detecting abnormality in blast furnace, and method for operating blast furnace |
| JP2015025199A (en) * | 2013-06-19 | 2015-02-05 | Ｊｆｅスチール株式会社 | Unmelted ore detection method and blast furnace operation method |
| KR20160006228A (en) | 2013-06-19 | 2016-01-18 | 제이에프이 스틸 가부시키가이샤 | Method for detecting abnormality in blast furnace, and method for operating blast furnace |
| CN105308191A (en) * | 2013-06-19 | 2016-02-03 | 杰富意钢铁株式会社 | Method for detecting abnormality in blast furnace, and method for operating blast furnace |
| US10151006B2 (en) | 2013-06-19 | 2018-12-11 | Jfe Steel Corporation | Method of detecting abnormality at blast furnace and method of operating blast furnace |
| WO2015015936A1 (en) | 2013-07-29 | 2015-02-05 | Ｊｆｅスチール株式会社 | Abnormality detection method and blast-furnace operation method |
| KR20160020574A (en) | 2013-07-29 | 2016-02-23 | 제이에프이 스틸 가부시키가이샤 | Abnormality detection method and blast-furnace operation method |
| CN105392904A (en) * | 2013-07-29 | 2016-03-09 | 杰富意钢铁株式会社 | Abnormality detection method and blast-furnace operation method |
| US9799110B2 (en) | 2013-07-29 | 2017-10-24 | Jfe Steel Corporation | Abnormality detection method and blast furnace operation method |
| JP2015052148A (en) * | 2013-09-06 | 2015-03-19 | 新日鐵住金株式会社 | Method for controlling blast furnace by determining operational situation thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103017530B (en) | Method and system for predicting sintering burn-through point | |
| JPH05186811A (en) | Method for operating blast furnace | |
| JP2021503042A (en) | Blast furnace blower control device and its method | |
| CN103045855A (en) | Method and system for predicting thickness of sintered ore bed | |
| US20240132982A1 (en) | Residual liquid amount detection method and detection apparatus for the same, residual molten material amount detection method and detection apparatus for the same, and method for operating vertical furnace | |
| US20240118029A1 (en) | Liquid level detection method and detection apparatus for the same, molten material liquid level detection method and detection apparatus for the same, and method for operating vertical furnace | |
| KR100896569B1 (en) | An Apparatus for Controlling the Sub Gate in Sintering Facilities | |
| JP3624658B2 (en) | Evaluation method of in-furnace deposition shape stability in blast furnace | |
| WO2022168556A1 (en) | Method for detecting remaining amount of liquid and detection device for same, method for detecting remaining amount of molten substance and detection device for same, and vertical furnace operation method | |
| CN113684330B (en) | Method for judging columnar state of dead charge by using descending speed of furnace charge | |
| WO2022168557A1 (en) | Detection method and detection device for liquid level height of liquid, detection method and detection device for liquid level height of molten material, and operation method for vertical furnace | |
| JPH08127822A (en) | Operation of sintering | |
| KR970010803B1 (en) | Control method of sintering finish point | |
| CN113699291A (en) | Method for calculating blast furnace material distribution drop point based on laser measurement data | |
| JPH0668138B2 (en) | Raw material charging control method for sintering machine | |
| JPH0437123B2 (en) | ||
| JPS59104407A (en) | Detector for distribution of burden of blast furnace | |
| JPH0953106A (en) | Method for controlling distribution of charged material in blast furnace | |
| JPH08188806A (en) | Method for controlling distribution of charged material in bellless blast furnace and instrument for detecting non-uniformity of surface level of charged material and method thereof | |
| JPS61119610A (en) | Method for controlling balance of blast furnace by water blowing | |
| JPH0841511A (en) | Control of blast furnace and device therefor | |
| JPH06256862A (en) | Method for controlling pallet velocity in sintering machine | |
| KR20010045851A (en) | Forecasting system of fine particle ratio of sintered ore and forecasting method using the same | |
| JPH07159050A (en) | Measuring device for sintered condition | |
| JPH08170114A (en) | Detection/discrimination of gas speed distribution in blast furnace throat part and blast furnace operation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980514 |