JPS6361366B2 - - Google Patents
Info
- Publication number
- JPS6361366B2 JPS6361366B2 JP19457385A JP19457385A JPS6361366B2 JP S6361366 B2 JPS6361366 B2 JP S6361366B2 JP 19457385 A JP19457385 A JP 19457385A JP 19457385 A JP19457385 A JP 19457385A JP S6361366 B2 JPS6361366 B2 JP S6361366B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- utilization rate
- hydrogen gas
- gas utilization
- top gas
- 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
Links
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 46
- 239000007789 gas Substances 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 description 10
- 230000007423 decrease Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 4
- 238000007726 management method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000000571 coke Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
- Blast Furnaces (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は高炉炉頂ガスの水素ガス利用率を用
いた炉内温度分布制御法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for controlling temperature distribution in a blast furnace using the hydrogen gas utilization rate of top gas.
（従来の技術）
従来、高炉炉内の熱レベルの評価は、炉頂ガス
のCOガス利用率を用いた方法によつて行なつて
来たが、このCOガス利用率による方法では、CO
ガス測定に加えて各種検出端（炉頂ゾンデ、シヤ
フトゾンデ、垂直ゾンデ等）により炉内の半径方
向と炉高方向の温度分布も測定しなければならな
かつた。(Prior art) Conventionally, the heat level inside a blast furnace has been evaluated by a method using the CO gas utilization rate of the furnace top gas.
In addition to gas measurements, it was also necessary to measure the temperature distribution in the radial and furnace height directions inside the furnace using various detection terminals (top sonde, shaft sonde, vertical sonde, etc.).
この方法の改善策として、例えば、特開昭59−
226109（特願昭58−101284）号公報に、高炉シヤ
フト部における炉径方向の複数点で炉内ガスを分
析し、水素ガス利用率または水素ガス利用率／
COガス利用率を測定することにより、上記測定
点における炉高方向の温度分布を測定する方法が
開示されている。 As an improvement to this method, for example,
226109 (Japanese Patent Application No. 58-101284) discloses that the gas in the furnace is analyzed at multiple points in the radial direction of the blast furnace shaft, and the hydrogen gas utilization rate or hydrogen gas utilization rate/
A method is disclosed for measuring the temperature distribution in the furnace height direction at the measurement point by measuring the CO gas utilization rate.
（発明が解決しようとする問題点）
上記従来の方法では、円周方向の一方向の値を
代表値とするために実炉では円周方向のばらつき
が大きくなり、炉全体の状態を把握できず、この
方法を操業管理に使用することはできない。仮
に、円周方向の測定点を増して円周方向に、10cm
程度のサンプリング口のある複数の検出端を設
け、この炉内複数点の検出端での測定による水素
ガス利用率を数学的に積分しても、炉直径が10ｍ
程度の高炉においては、全体に対してサンプル量
が小さいために大きな誤差を生じ、適切な処置が
行なえない。さらに、上記の方法では、径方向に
複数点のサンプリングが必要であり、その分析に
多大の手間とコストを要するとともにデーターの
解析が複雑であり、たとえ解析しても前記の通り
実炉の炉況に合致しない等の欠点があり炉況管理
方法としては十分とは言い難い。(Problems to be Solved by the Invention) In the conventional method described above, since a value in one direction in the circumferential direction is used as a representative value, variations in the circumferential direction become large in an actual furnace, making it difficult to grasp the condition of the entire furnace. However, this method cannot be used for operational management. For example, if we increase the number of measurement points in the circumferential direction,
Even if we set up multiple detection ends with sampling ports of about 100 ft, and mathematically integrate the hydrogen gas utilization rate measured at the detection ends at multiple points in the furnace, the furnace diameter is 10 m.
In the case of a blast furnace of about 100,000 yen, the sample amount is small compared to the whole, so large errors occur and appropriate measures cannot be taken. Furthermore, the above method requires sampling at multiple points in the radial direction, which requires a lot of effort and cost to analyze, and the data analysis is complicated. It is difficult to say that this method is sufficient as a furnace condition management method because it has drawbacks such as not matching the situation.
本発明は、上記の従来の方法によるよりも、簡
単な方法であつて、精度高く炉内状況の把握がで
き、この把握した炉内状況に基づいて制御が可能
であり、極めて効果的な炉内温度分布の制御法を
提供することを目的とする。 The present invention is a simpler method than the above-mentioned conventional methods, and allows the situation inside the furnace to be grasped with high accuracy, and control can be performed based on this grasped situation inside the furnace, resulting in an extremely effective furnace. The purpose is to provide a method for controlling internal temperature distribution.
（問題点を解決するための手段）
本発明は、高炉炉頂ガス中のH2量の測定によ
つて求められる排出H2量とインプツトのH2量と
から求めた水素ガス利用率ηH2〔（インプツトH2
量−排出H2量）／インプツトH2量×100〕と、
各種ゾンデを用いて測定した炉半径、炉高方向の
炉内温度分布とが一定の関係にあり、しかも該水
素ガス利用率ηH2が一定値より低下すると、突込
み、スリツプ等の炉況悪化を招くことを知見した
ことから得られた。(Means for Solving the Problems) The present invention provides a hydrogen gas utilization rate ηH 2 determined from the amount of discharged H 2 determined by measuring the amount of H 2 in the blast furnace top gas and the amount of H 2 at the input. [(Input H 2
Amount - Emission H2 amount) / Input H2 amount x 100],
There is a certain relationship between the furnace radius measured using various sondes and the temperature distribution inside the furnace in the direction of the furnace height, and if the hydrogen gas utilization rate ηH 2 decreases below a certain value, deterioration of the furnace condition such as plunge and slip may occur. This was gained from my knowledge of inviting people.
而して、本発明は、高炉炉頂ガス中のH2量を
測定して、該高炉の水素ガス利用率を求めるとと
もに、該水素ガス利用率が50％以下となつた際
に、装入物分布変更、熱レベル変更のいずれか一
方の処置、もしくは併用処置を行なうことを特徴
とする高炉炉頂ガスの水素ガス利用率を用いた炉
内温度分布制御法である。 Therefore, the present invention measures the amount of H2 in the blast furnace top gas to determine the hydrogen gas utilization rate of the blast furnace, and when the hydrogen gas utilization rate becomes 50% or less, the charging This is a furnace temperature distribution control method using the hydrogen gas utilization rate of the blast furnace top gas, which is characterized by performing either one of changing the material distribution and changing the heat level, or a combination of them.
以下に、上記知見を得ることとなつたいろいろ
なデーターについて説明する。 Below, various data that led to the above findings will be explained.
先づ、高炉炉内の温度分布を第１図に示す。第
１図ａ，ｂは大型高炉で３月26日（〇印で示す）
と５月29日（△印で示す）に垂直ゾンデにより測
定したデーターであり、ａは、中心Ｃ（炉壁から
2.5ｍの位置）、中間Ｍ（炉壁から2.5ｍの位置）周
辺Ｐ（炉壁から0.6ｍの位置）における1100℃ライ
ンを示し、ｂはηH2＝44.7％のとき（△印）と
ηH2＝52.8％のとき（〇印）の中間Ｍの炉高方向
の温度分布を示す。 First, Figure 1 shows the temperature distribution inside the blast furnace. Figure 1 a and b show a large blast furnace on March 26th (indicated by a circle).
and May 29th (indicated by △) using a vertical sonde.
2.5m position), middle M (2.5m from the furnace wall), peripheral P (0.6m from the furnace wall), and b shows the 1100℃ line when ηH 2 = 44.7% (△ mark) and ηH The temperature distribution in the furnace height direction at the middle M when 2 = 52.8% (○ mark) is shown.
第１図ｂに示した温度分布データーと、これに
対応する炉高方向の水素ガス利用率を第２図に示
す。この図で３月26日と５月29日の温度分布デー
ターを比較すると、1000℃近傍の温度（高温熱保
存帯）の長さが大きく違うことが判る。 The temperature distribution data shown in FIG. 1b and the corresponding hydrogen gas utilization rate in the furnace height direction are shown in FIG. Comparing the temperature distribution data for March 26th and May 29th in this figure, it can be seen that the length of the temperature near 1000°C (high-temperature thermal storage zone) is significantly different.
そして第２図の３月26日と５月29日の温度分布
と水素ガス利用率のデータを書き換えると、第３
図が得られる。この図から３月26日、５月29日の
データ共温度低下に伴つて、水素ガス利用率は上
昇することが知られる。そして、熱保存帯の長い
３月26日の水素ガス利用率と熱保存帯の短い５月
29日の水素ガス利用率のプロツトが画く線は1000
℃付近で交差し、1000℃付近の前後で急速に離れ
ている。これは、熱保存帯長さの差によるものと
考えられる。つまり、３月26日データーと５月29
日データーの1000℃近傍におけるH2O増加量が
異なるのは、ガスの1000℃近傍滞留時間が３月26
日データーは長く、５月29日データーは短いため
であり、従つて滞留時間の短かい５月29日データ
ーでは、還元反応が十分に起らず、ウスタイト−
銑平衡濃度にまで達しないうちに1000℃領域を通
過することによると考えられる。 Then, if we rewrite the temperature distribution and hydrogen gas utilization data for March 26th and May 29th in Figure 2,
A diagram is obtained. From this figure, it is known that the hydrogen gas utilization rate increases as the temperature decreases based on the data for March 26th and May 29th. And the hydrogen gas utilization rate on March 26th, when the heat reserve zone is long, and in May, when the heat reserve zone is short.
The line drawn by the hydrogen gas utilization rate plot on the 29th is 1000.
They intersect at around ℃ and rapidly separate around 1000℃. This is thought to be due to the difference in the length of the thermal storage zone. In other words, March 26th data and May 29th data
The difference in the increase in H 2 O near 1000℃ in the daily data is due to the residence time of the gas near 1000℃ on March 26.
This is because the daily data is long and the May 29th data is short. Therefore, with the May 29th data where the residence time is short, the reduction reaction does not occur sufficiently and the wustite-
This is thought to be due to the iron passing through the 1000°C region before reaching the equilibrium concentration.
そこで、次に垂直ゾンデ中間部における900〜
1100℃滞留時間と炉頂ガスの水素ガス利用率との
関係を求め、第４図を得た。この図から熱保存帯
長さに対応する900〜1100℃滞留時間が短くなる
と炉頂ガスの水素ガス利用率は低下することが判
る。なお、中心部、周辺部についても測定した
が、同様の結果となつた。このことは、炉頂ガス
の水素ガス利用率が低い場合には、熱保存帯長さ
が短く、シヤフト上部での昇温が十分でない場合
であることを示している。 Therefore, next, 900~ at the middle part of the vertical sonde.
The relationship between the residence time at 1100°C and the hydrogen gas utilization rate of the furnace top gas was determined, and Figure 4 was obtained. From this figure, it can be seen that as the residence time at 900 to 1100°C, which corresponds to the length of the heat storage zone, becomes shorter, the hydrogen gas utilization rate of the furnace top gas decreases. Note that measurements were also conducted on the center and peripheral areas, and similar results were obtained. This indicates that when the hydrogen gas utilization rate of the furnace top gas is low, the heat storage zone length is short and the temperature rise at the upper part of the shaft is not sufficient.
また、炉頂ガスの水素ガス利用率と中間部1100
℃位置のストツクラインからの距離の関係を第５
図に示す。なほ、図中における1100℃位置にほぼ
軟化融着帯上面に対応すると考えられる。この図
から中間部1100℃位置が上昇すると炉頂ガスの水
素ガス利用率は低下することが判る。 In addition, the hydrogen gas utilization rate of the furnace top gas and the middle part 1100
The relationship between the distance from the stock line at the °C position is
As shown in the figure. Indeed, it is thought that the 1100°C position in the figure roughly corresponds to the upper surface of the softened cohesive zone. From this figure, it can be seen that as the intermediate 1100°C position rises, the hydrogen gas utilization rate of the furnace top gas decreases.
さらに、第６図ａに1100℃ライン形状（融着帯
形状に対応する）を示し、ａの△Ｈ長さと炉頂ガ
スの水素ガス利用率との関係を第６図ｂに示す。
ここで、△Ｈは中心部1100℃位置と周辺部1100℃
位置の差である。図から△Ｈが増加すると炉頂ガ
スの水素ガス利用率は低下することが判る。この
ことから、△Ｈの大きい融着帯頂層と根レベル差
の大きい中心流過多の融着帯ほど炉頂ガスの水素
ガス利用率は低いと考えられる。 Further, Fig. 6a shows the 1100°C line shape (corresponding to the cohesive zone shape), and Fig. 6b shows the relationship between the ΔH length of a and the hydrogen gas utilization rate of the furnace top gas.
Here, △H is 1100℃ in the center and 1100℃ in the periphery.
This is a difference in position. It can be seen from the figure that as ΔH increases, the hydrogen gas utilization rate of the furnace top gas decreases. From this, it is thought that the hydrogen gas utilization rate of the furnace top gas is lower as the cohesive zone has a larger center flow-excessive cohesive zone with a larger difference between the top layer of the cohesive zone and the root level with a larger ΔH.
以上の第５〜６図に示されるデーターから、炉
頂ガスの水素ガス利用率を用いて炉高方向のみで
なく炉径方向の温度分布も検知できることがわか
つた。また、この傾向は精度良く十分な再現性を
もつて把握できることも知られた。 From the data shown in FIGS. 5 and 6 above, it was found that the temperature distribution not only in the furnace height direction but also in the furnace radial direction can be detected using the hydrogen gas utilization rate of the furnace top gas. It has also been found that this trend can be grasped with high precision and sufficient reproducibility.
従つて水素ガス利用率の管理基準を設定し操業
アクシヨンを行なうことによつて炉況の予防制御
が可能であることが明らかになつた。 Therefore, it has become clear that preventive control of the furnace condition is possible by setting management standards for the hydrogen gas utilization rate and taking operational actions.
なお、炉頂ガスの水素ガス利用率の下限管理値
は、各種ゾンデ（炉頂ゾンデ、シヤフトゾンデ、
垂直ゾンデ）を用いて測定された炉半径、炉高方
向の炉内温度分布を炉頂ガスの水素ガス利用率の
関係から予め決めておく。具体的には、設定基準
は、炉内の余剰熱レベルを表わす熱保存帯長さを
目安として決定するが、この際のηH2としては50
％以下となる。 In addition, the lower limit control value of the hydrogen gas utilization rate of the furnace top gas is
The furnace radius measured using a vertical sonde and the temperature distribution inside the furnace in the direction of the furnace height are determined in advance from the relationship with the hydrogen gas utilization rate of the furnace top gas. Specifically, the setting standard is determined based on the length of the heat storage zone, which represents the surplus heat level in the furnace, and in this case, ηH 2 is 50
% or less.
炉頂ガスの水素ガス利用率が下限値を割つた時
の炉内温度分布制御アクシヨンには、ムーバブル
アーマーのシーケンス変更、差指レベルの変更、
不等量装入（鉱石ＯとＯの装入量を変えて装
入する方法）、粒度別装入、ベルレスシユートシ
ーケンス変更等の装入物分布アクシヨンとバツチ
増骸（一時的に数バツチ〜数十バツチ燃料比を上
げる方法）、微粉炭吹込量変更、送風温度の変更
等の熱レベル変更アクシヨンがあり、各々単独あ
るいはいずれかを組合せて処置を行う。 The temperature distribution control actions in the furnace when the hydrogen gas utilization rate of the furnace top gas falls below the lower limit include changing the sequence of the movable armor, changing the index finger level,
Burden distribution actions such as unequal charging (a method of charging by changing the amount of ore O and O), charging by particle size, changing the bellless shoot sequence, and batch bulking (temporarily charging several batches) There are several heat level change actions such as increasing the fuel ratio in batches of several tens of times), changing the amount of pulverized coal injected, and changing the air blowing temperature. Each of these actions can be taken alone or in combination.
（実施例） 次に大型高炉における実施例を示す。(Example) Next, an example in a large blast furnace will be shown.
炉頂ガスの水素ガス利用率の下限値は、第７図
に示す垂直ゾンデを用いて測定した周辺部900〜
1100℃滞留時間と炉頂ガスの水素ガス利用率との
関係を用いて設定した。前述したように、熱保存
帯長さを基準と考え、鉱石／コークスの値が大き
く、温度条件の厳しい周辺部の900〜1100℃滞留
時間が130分になる点の炉頂ガスの水素ガス利用
率の値を下限値とした。すなわち、炉頂ガスの水
素ガス利用率の管理下限値を50％とした。 The lower limit of the hydrogen gas utilization rate of the furnace top gas is 900 ~
It was set using the relationship between the residence time at 1100℃ and the hydrogen gas utilization rate of the furnace top gas. As mentioned above, considering the length of the thermal storage zone as the standard, hydrogen gas is utilized from the furnace top gas at the point where the residence time at 900 to 1100℃ is 130 minutes in the peripheral area where the ore/coke value is large and the temperature conditions are severe. The value of the ratio was taken as the lower limit. In other words, the lower limit for controlling the utilization rate of hydrogen gas in the furnace top gas was set at 50%.
この管理基準にもとづいて、第８図に例示する
ように操業アクシヨンを行なつた。 Based on this control standard, operational actions were carried out as illustrated in FIG.
すなわち、第８図ａに示されるように、１月３
日から炉頂ガスの水素ガス利用率が低下し、これ
に伴い第８図ｄに示すように中部シヤフトゾンデ
（ポイント４＝ストツクラインから12ｍ、半径位
置はほぼ垂直ゾンデ中間位置）の温度が低下し、
同図ｇに示す突込Ｔ、スリツプＳ等の荷下りの悪
化が発生した。なお、この時、第８図ｂに示すよ
うにCOガス利用率の低下は見られなかつた。 That is, as shown in Figure 8a, January 3
The hydrogen gas utilization rate of the furnace top gas has been decreasing since 2013, and as a result, the temperature of the central shaft sonde (point 4 = 12 m from the stock line, approximately in the middle of the vertical sonde) has decreased, as shown in Figure 8d. ,
Deterioration of the unloading, such as plunge T and slip S, as shown in g in the figure, occurred. At this time, as shown in Figure 8b, no decrease in the CO gas utilization rate was observed.
炉頂ガスの水素ガス利用率の低下は、第６図の
説明で述べたように中心流過多で周辺が抑制され
ていると考えられるので、第８図ｅに示す通りム
ーバブルアーマーのシーケンスを0A00（Ａは3.5
ノツチを示す）から0A00，0A00，0300に変更
し、周辺部の鉱石／コークスの値を小さくし周辺
部にガスが流れやすいように、３日23時に装入物
分布のアクシヨンをした。 As mentioned in the explanation of Figure 6, the decrease in the hydrogen gas utilization rate of the furnace top gas is thought to be due to the excess central flow suppressing the surrounding area, so the movable armor sequence is changed to 0A00 as shown in Figure 8e (A is 3.5
(indicating a notch) to 0A00, 0A00, 0300, and an action was taken on the charge distribution at 23:00 on the 3rd to reduce the value of ore/coke in the surrounding area and make it easier for gas to flow to the surrounding area.
このアクシヨンの後も第８図ａに示される通り
炉頂ガスの水素ガス利用率は上昇せず、また、同
図ｄに示される通り中部シヤフトゾンデの温度も
上昇せず、同頁ｇに記載のように突込Ｔ、スリツ
プＳ等の荷下の悪化は続いた。このため、第８図
ｆに示すように、４日１時より15チヤージ、５日
10時より15チヤージのコークス量を通常の27T／
chから27.3T／chとし炉内熱レベルの上昇を図つ
た。 Even after this action, as shown in Figure 8a, the hydrogen gas utilization rate of the furnace top gas did not increase, and as shown in Figure 8d, the temperature of the middle shaft sonde did not increase, and as shown in Figure 8g. The deterioration of loading conditions such as plunge T and slip S continued. For this reason, as shown in Figure 8f, 15 charges were made from 1 o'clock on the 4th, and
From 10 o'clock, the amount of coke of 15 charges will be changed to the usual 27T/
The heat level inside the furnace was increased from ch to 27.3T/ch.
こ結果６日には炉頂ガスの水素ガス利用率は上
昇し、荷下りも良好となり、中部シヤフトゾンデ
４ポイントの温度も回復した。このため６日ムー
バブルアーマーのシーケンスを0A00に戻した。 As a result, on the 6th, the utilization rate of hydrogen gas at the top of the furnace increased, unloading improved, and the temperature at the 4 points of the central shaft sonde also recovered. For this reason, the Movable Armor sequence was returned to 0A00 on the 6th.
なお６日のバツチ増骸は、ムーバブルアーマー
変更による周辺の極端なガス流抑制防止のために
行なつたアクシヨンである。以上のように、炉頂
ガスの水素ガス利用率の低下に対して迅速なアク
シヨンを行なつた結果、第８図ｃに示すように溶
銑温度の急低下もなく安定操業を持続できた。 The bulk increase on the 6th was an action taken to prevent extreme gas flow restriction in the surrounding area due to changes in movable armor. As described above, as a result of taking prompt action in response to the decrease in the hydrogen gas utilization rate of the furnace top gas, stable operation could be maintained without a sudden drop in the hot metal temperature, as shown in Figure 8c.
（発明の効果）
以上述べた炉頂ガスの水素ガス利用率を用いた
炉内温度分布制御法を用いることにより、簡単な
方法で炉内温度状況を適切、高精度に検知、把握
でき、これに基づいて適宜処理を行うことにより
炉内温度分布は安定下し、荷下り等もよくなり、
操業の安定化に効果がある。その上、この方法を
用いると熱保存帯長さの管理、融着帯レベル、形
状の管理制御も簡単、かつ連続的に行なえ、各種
検出端使用頻度の減少および設置省略等によるコ
スト削減も行なえる。(Effects of the invention) By using the above-mentioned furnace temperature distribution control method using the hydrogen gas utilization rate of the furnace top gas, it is possible to appropriately and accurately detect and grasp the temperature situation inside the furnace using a simple method. By performing appropriate treatment based on
It is effective in stabilizing operations. Furthermore, by using this method, the management of the length of the thermal storage zone, the level and shape of the cohesive zone can be easily and continuously controlled, and costs can also be reduced by reducing the frequency of use of various detection ends and omitting installation. Ru.
第１図は３月26日（〇印）と５月29日（△印）
の1100℃ラインと中間部の炉高方向の温度分布の
関係を示し、第２図は炉高方向のガス温度と水素
ガス利用率の変化をそれぞれ示す。第３図炉内温
度と水素ガス利用率の関係を示し、第４図は炉頂
ガスの水素ガス利用率と中間部900〜1100℃滞留
時間の関係を示し、第５図は炉頂ガスの水素ガス
利用率と中間部1100℃位置の関係を示し、第６図
は炉頂ガスの水素ガス利用率と1100℃ラインの形
状炉の中心Ｃと周辺Ｐの位置の高さの差ΔHとの
関係を示し、第７図は実施例における炉頂ガスの
水素ガス利用率と周辺部900〜1100℃滞留時間の
関係を、第８図は本発明の実施例の操業例を示
す。
Figure 1 shows March 26th (○ mark) and May 29th (△ mark)
Figure 2 shows the relationship between the 1100℃ line and the temperature distribution in the furnace height direction at the middle part, and Figure 2 shows the changes in gas temperature and hydrogen gas utilization rate in the furnace height direction. Figure 3 shows the relationship between the furnace temperature and the hydrogen gas utilization rate, Figure 4 shows the relationship between the hydrogen gas utilization rate of the furnace top gas and the residence time between 900 and 1100℃ in the middle part, and Figure 5 shows the relationship between the furnace top gas Figure 6 shows the relationship between the hydrogen gas utilization rate and the 1100°C position in the middle part. FIG. 7 shows the relationship between the hydrogen gas utilization rate of the furnace top gas and the residence time at 900 to 1100° C. in the peripheral area in the example, and FIG. 8 shows an example of operation of the example of the present invention.
Claims (1)
の水素ガス利用率を求めるとともに、該水素ガス
利用率が50％以下となつた際に、装入物分布変
更、熱レベル変更のいずれか一方の処置、もしく
は併用処置を行なうことを特徴とする高炉炉頂ガ
スの水素ガス利用率を用いた炉内温度分布制御
法。 但し、水素ガス利用率＝（インプツトH2量−排出H2量
）／（インプツトH2量）×100[Claims] 1. Measure the amount of H2 in the blast furnace top gas to determine the hydrogen gas utilization rate of the blast furnace, and when the hydrogen gas utilization rate becomes 50% or less, A method for controlling temperature distribution in a blast furnace using hydrogen gas utilization rate of top gas of a blast furnace, characterized by performing either distribution change, heat level change, or a combination thereof. However, hydrogen gas utilization rate = (Input H2 amount - Exhaust H2 amount) / (Input H2 amount) x 100
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19457385A JPS6254006A (en) | 1985-09-03 | 1985-09-03 | Method for controlling distribution of temperature in blast furnace using rate of utilization of gaseous hydrogen in said furnace top |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19457385A JPS6254006A (en) | 1985-09-03 | 1985-09-03 | Method for controlling distribution of temperature in blast furnace using rate of utilization of gaseous hydrogen in said furnace top |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6254006A JPS6254006A (en) | 1987-03-09 |
| JPS6361366B2 true JPS6361366B2 (en) | 1988-11-29 |
Family
ID=16326782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19457385A Granted JPS6254006A (en) | 1985-09-03 | 1985-09-03 | Method for controlling distribution of temperature in blast furnace using rate of utilization of gaseous hydrogen in said furnace top |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6254006A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6954255B2 (en) * | 2018-10-31 | 2021-10-27 | Ｊｆｅスチール株式会社 | Calculation method of mixing ratio of ferro-coke and blast furnace operation method |
-
1985
- 1985-09-03 JP JP19457385A patent/JPS6254006A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6254006A (en) | 1987-03-09 |
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