JPH0586446B2 - - Google Patents
Info
- Publication number
- JPH0586446B2 JPH0586446B2 JP7881086A JP7881086A JPH0586446B2 JP H0586446 B2 JPH0586446 B2 JP H0586446B2 JP 7881086 A JP7881086 A JP 7881086A JP 7881086 A JP7881086 A JP 7881086A JP H0586446 B2 JPH0586446 B2 JP H0586446B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- charge
- reactor
- surface layer
- descent
- 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
- 239000002344 surface layer Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 10
- 239000010410 layer Substances 0.000 description 24
- 239000002994 raw material Substances 0.000 description 18
- 238000005259 measurement Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000002801 charged material Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 210000000744 eyelid Anatomy 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Blast Furnaces (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、堅型炉内の装入物の挙動、特に表層
部のなだれ状況を正確に検出する方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for accurately detecting the behavior of a charge in a vertical furnace, particularly the avalanche situation in the surface layer.
［従来の技術］
堅型炉、例えば高炉には、鉱石類とコークスが
交互に装入され、下方より上昇する高温還元ガス
によつて酸化鉄の還元が行なわれる。生成した鉄
及びスラグは夫々溶融して炉底部に滴下し、断続
的又は連続的に炉外へ取り出される。従つて装入
された鉱石類等の装入物は前記還元反応の進行に
応じて徐々に降下し、その降下に対応して新しい
装入物が装入される。[Prior Art] In a vertical furnace, such as a blast furnace, ores and coke are alternately charged, and iron oxide is reduced by high-temperature reducing gas rising from below. The produced iron and slag are respectively melted and dripped onto the bottom of the furnace, and are taken out of the furnace intermittently or continuously. Therefore, the charged materials such as ores are gradually lowered as the reduction reaction progresses, and new materials are introduced in response to the lowering.
この様な炉内装入物降下状況及び新規装入状況
は当然ながら装入物の層厚分布を左右するが、こ
れらの層厚分布と操炉状況との間には顕著な相関
が認められ、ガス流の状況や軟化融着帯の形状等
にも大きな影響を与えることが分かつている。そ
の為装入物が現在どの様な状態で堆積されている
かを知ることは、新規装入物の装入落下位置制御
を適切に実施する為にも重要なことであり、これ
によつて適正堆積状態の維持並びに操炉制御の安
定を図ることが可能となるのである。尚装入物の
落下位置制御方法としてはベル式装入におけるア
ーマープレートの調整方法、或はベルレス式装入
における回転シユートの調整方法等が実施されて
いる。しかし例えばベル式装入におけるアーマー
プレートの操作と装入物堆積状況との関係はモデ
ル実験的に知られているのみであり、実炉操業下
における堆積状況がこれだけでコントロールでき
ている訳ではなく、実炉における堆積状況の正確
な検出は、装入制御の高精度化を図る上でもぜひ
必要なこととされている。 Naturally, the condition of the falling charge in the furnace and the condition of new charging affect the layer thickness distribution of the charge, but there is a remarkable correlation between the layer thickness distribution and the condition of the furnace operation. It is known that it has a great influence on the gas flow conditions and the shape of the softened cohesive zone. Therefore, it is important to know in what state the charges are currently being deposited in order to properly control the position of the new charges. This makes it possible to maintain the deposition state and stabilize reactor operation control. As a method for controlling the falling position of the charge, methods such as adjusting an armor plate in bell-type charging, or adjusting a rotary chute in bellless-type charging have been implemented. However, for example, the relationship between the operation of the armor plate in bell-type charging and the charge deposition situation is only known from model experiments, and this does not mean that the deposition situation in actual reactor operation can be controlled by this alone. Accurate detection of the deposition status in actual reactors is considered essential for achieving high accuracy in charging control.
この様なところから、炉内の装入物積層状況を
具体的に且つ正しく承知する為の手段として、特
公昭58−18433号公報や特公昭58−18591号公報に
記載される様な炉内装入物の表層位置測定装置
（以下プロフイールメーターということがある）
が提案されている。第２図は該装置及びこれによ
る炉内状況検出方法を示す為の概略説明図で、図
示部分は高炉々頂部を表わしている。第２図にお
いて鉄皮１の内面には耐火材２が内張されると共
に大ベル３から落下する装入物は、装入物の落下
位置を調整するアーマープレート８によつて規制
されながら落下し原料層４を形成する。尚アーマ
ープレート８は図面の左右方向に移動し、炉心に
近づけると原料層４の表面は炉心側で高い堆積状
態となり、炉心から遠ざけると炉壁側で高い堆積
状態が得られる。一方プロフイールメーターは、
鉄皮１の貫通孔１０にランス９を進退自在に取付
けてなり、ランス９からは先端に重錘７を設けた
ワイヤ６が複数本垂下されている。そしてワイヤ
６の後端は夫々ドラム（図示せず）に巻付けら
れ、且つワイヤ６単独の重量よりはやや強いが、
ワイヤ６と重錘７を合わせた総重力よりも弱いバ
ツクテンシヨンが与えられている。従つて各重錘
７が原料層４の上に着床するとワイヤ６の繰り出
しが停止され、ワイヤ６にたるみを生じることは
ない。そして高炉還元反応の進行によつて原料層
が徐々に降下しはじめると、重錘７は各々自重に
よつてそれに追従し、ワイヤ６にたるみを生じな
い状況を維持しつつ降下しワイヤ６が繰り出され
ていく。従つてこの追従速さあるいは追従降下量
を、上記ドラムの回転周速度や回転角等によつて
検知すれば、原料層４の降下状況を知ることがで
き、こうして得た検知結果を総合すれば装入物の
積層状況の変化を把握することができ、操業条件
のコントロールに利用することができる。ベルレ
ス装入方式においても実質的に同じ様に操業され
ている。 From this point of view, as a means to concretely and correctly understand the charge stacking situation in the furnace, the furnace interior as described in Japanese Patent Publication No. 18433/1983 and No. 18591/1983 is recommended. Device for measuring the surface position of containers (hereinafter sometimes referred to as profile meter)
is proposed. FIG. 2 is a schematic explanatory diagram showing the apparatus and the method for detecting the condition inside the furnace using the apparatus, and the illustrated part represents the top of the blast furnaces. In Figure 2, the inner surface of the steel shell 1 is lined with a refractory material 2, and the charge falling from the large bell 3 is regulated by an armor plate 8 that adjusts the falling position of the charge. Then, a raw material layer 4 is formed. It should be noted that the armor plate 8 moves in the left-right direction in the drawing, and as it approaches the reactor core, the surface of the raw material layer 4 becomes highly deposited on the core side, and as it moves away from the reactor core, a highly deposited state is obtained on the reactor wall side. On the other hand, Profilemeter is
A lance 9 is attached to a through hole 10 of a steel shell 1 so as to be movable forward and backward, and a plurality of wires 6 each having a weight 7 at the tip are suspended from the lance 9. The rear ends of the wires 6 are each wound around a drum (not shown), and are slightly stronger than the weight of the wires 6 alone.
A back tension weaker than the total gravity of the wire 6 and the weight 7 is applied. Therefore, when each weight 7 lands on the raw material layer 4, the feeding of the wire 6 is stopped, and the wire 6 does not become slack. As the raw material layer gradually begins to fall as the blast furnace reduction reaction progresses, the weights 7 follow it due to their own weight, and descend while maintaining the wire 6 without slack, allowing the wire 6 to pay out. It goes down. Therefore, by detecting this follow-up speed or follow-up drop amount based on the rotational circumferential speed, rotation angle, etc. of the drum, it is possible to know the descending status of the raw material layer 4, and by integrating the detection results obtained in this way, It is possible to grasp changes in the stacking status of charges, which can be used to control operating conditions. Bellless charging systems operate in substantially the same manner.
［発明が解決しようとする問題点］
しかるに炉内の原料層降下状況は想像されてい
る以上に複雑であり、装入物の降下が還元反応の
進行による自然降下だけで説明される程に単純な
ものであるならば、上記炉内状況検出方法だけで
も十分適切な対応が可能なはずであるが、実情で
は必ずしも炉内状況を正確に把握できているとは
言えず上記検出に従つた制御を行なつていても操
炉状態が悪化することがしばしば経験された。本
発明者等はこうした自体に鑑みその原因を明らか
にすべく色々なモデル実験を行なつた。その結果
によると、大ベル３（回転シユートの場合を含
む、以下同じ）から落下・堆積した原料層４のう
ち、炉壁側装入物が表層なだれ状の現象を引き起
こして炉心部側へ流れ込む現象が起こつており、
これが炉内状況の正確な把握を困難にしているこ
とが分かつた。即ち上述した様な従来の炉内状況
検出方法では、このなだれ現象等の影響が全く考
慮されておらず、重錘７がなだれに伴つて偏位し
た状態とまつすぐ下に降下した状態を区別するこ
とをしていない。即ち検出結果は実情を正しく反
映しているとはいえず、検出結果をそのまま信頼
することは極めて危険であることが判明した。[Problems to be solved by the invention] However, the situation in which the material layer descends inside the furnace is more complex than expected, and is so simple that the descent of the charge can be explained only by natural descent due to the progress of the reduction reaction. If this is the case, then the method for detecting the situation inside the reactor should be enough to take appropriate measures, but in reality, it cannot be said that the situation inside the reactor is always accurately grasped, and the control according to the above detection is necessary. It was often experienced that the operating condition of the reactor deteriorated even after carrying out these measures. In view of this fact, the present inventors conducted various model experiments in order to clarify the cause. According to the results, among the raw material layer 4 that fell and accumulated from the large bell 3 (including the case of a rotating chute, the same applies hereinafter), the charge on the furnace wall causes an avalanche-like phenomenon on the surface layer and flows into the core side. A phenomenon is occurring,
It was found that this made it difficult to accurately grasp the situation inside the reactor. In other words, in the conventional method for detecting the situation inside the reactor as described above, the influence of this avalanche phenomenon is not taken into account at all, and it is difficult to distinguish between the state in which the weight 7 has deviated due to the avalanche and the state in which it has descended directly below the eyelid. I'm not doing what I'm supposed to do. In other words, it has been found that the detection results do not accurately reflect the actual situation, and that it is extremely dangerous to rely on the detection results as they are.
本発明はこうした事情に着目してなされたもの
であつて、なだれの発生等を含めた炉内状況の変
化を正確に把握することができる様な炉内状況検
出方法を提供することにより、適正な装入物堆積
状態を維持し、効率の高い操炉状態の保持に寄与
しようとするものである。 The present invention has been made with attention to these circumstances, and by providing a method for detecting the situation inside the reactor that can accurately grasp changes in the situation inside the reactor, including the occurrence of avalanches, etc. This aims to maintain a stable charge accumulation state and contribute to maintaining highly efficient furnace operation.
［問題点を解決する為の手段］
しかして上記目的を達成した本発明方法は、重
錘懸吊型ワイヤを用いて炉内装入物の表層を検知
するに当たり、炉内装入物表層上に重錘を置いた
まま装入物表層の変化に応じて重錘を追従させる
ことにより装入物表層の見掛けの降下速度を検出
すると共に、接触又は非接触型レベル計を用いて
装入物表層の実際の降下速度を求め、見掛けの降
下速度と実際の降下速度から装入物表層の挙動を
検出する点に要旨を有するものである。[Means for Solving the Problems] The method of the present invention, which has achieved the above object, detects the surface layer of the furnace charge using a weight-suspended wire. By keeping the weight in place and making it follow the change in the surface layer of the charge, the apparent rate of descent of the surface layer of the charge can be detected, and the surface layer of the charge can be detected using a contact or non-contact level meter. The purpose of this method is to obtain the actual descending speed and detect the behavior of the surface layer of the charge from the apparent descending speed and the actual descending speed.
［作用］
従来のプロフイールメーターによる原料層追従
降下量の測定は、重錘を原料層の降下に追従降下
させていくものである。かかる降下量測定中に前
述のなだれが発生すると重錘は装入物と共に流さ
れて炉心側へ移行する。その結果測定値は原料層
の降下量となだれによる移行（以下流れ込みとい
う）量を加えた値となり、目的とする原料層の降
下量を測定できないだけでなく、流れ込み量につ
いても把握できない。[Operation] In measuring the amount of descent following the raw material layer using a conventional profile meter, a weight is lowered to follow the descent of the raw material layer. If the aforementioned avalanche occurs during the measurement of the amount of descent, the weight is swept away together with the charge and moved toward the core side. As a result, the measured value is the sum of the amount of descent of the raw material layer and the amount of migration due to avalanches (hereinafter referred to as inflow), which not only makes it impossible to measure the desired amount of descent of the raw material layer, but also makes it impossible to grasp the amount of inflow.
そこで本発明においては、上記の如く装入物表
層部にプロフイールメーターの重錘を載せ装入物
の動きに追従させることによつて流れ込みを含ん
だ測定値Ａ（見掛け上の降下量）を検出する一方、
該追従測定とは別に接触又は非接触型レベル計を
用いて上記追従測定期間の開始時と終了時の装入
物積層高さの差即ち実際の原料層降下速度を求め
て測定値Ｂとする。尚測定値Ｂを求める為のレベ
ル計のうち接触型のものとしては例えば上記と同
様のプロフイールメーターを挙げることができ
る。即ちこの場合にはプロフイールメーターの重
錘を追従測定開始時に原料層表層へ着床させて表
層位置を検出した後、一旦重錘を引き上げて待機
しておき、追従測定終了時に再び原料層表層へ垂
直に着床させてそのときの表層位置を検出する。
こうして得た表層位置の差と測定時刻の差から実
際の原料層降下速度Ｂを求める。こうして実際の
原料層降下速度を求めた場合、重錘は表層に一時
的に着床するだけですぐに引き上げるのでなだれ
があつても重錘が流されるといつた影響は受けず
実際の原料層降下速度Ｂを得ることができる。尚
非接触型レベル計としては上記以外にレーザ光線
やマイクロ波の反射等を利用した公知のレベル計
を例示することができる。 Therefore, in the present invention, as described above, the weight of the profile meter is placed on the surface layer of the charge to follow the movement of the charge, thereby detecting the measured value A (apparent drop amount) including the inflow. On the other hand,
Separately from the follow-up measurement, use a contact or non-contact level meter to determine the difference in charge stack height at the start and end of the follow-up measurement period, that is, the actual material layer descending speed, and use it as the measurement value B. . An example of a contact type level meter for determining the measured value B is a profile meter similar to the one described above. In other words, in this case, the weight of the profile meter is placed on the surface layer of the raw material layer at the start of tracking measurement to detect the surface layer position, and then the weight is pulled up once and placed on standby, and then returned to the surface layer of the material layer at the end of tracking measurement. The surface layer position at that time is detected by placing it vertically on the ground.
The actual material layer descending speed B is determined from the difference in surface layer position obtained in this manner and the difference in measurement time. When calculating the actual descending speed of the raw material layer in this way, the weight only temporarily lands on the surface layer and is immediately pulled up, so even if an avalanche occurs, the weight will not be affected by being washed away and the actual raw material layer will fall. A descending speed B can be obtained. In addition to the above, examples of non-contact level meters include known level meters that utilize reflection of laser beams and microwaves.
こうして得た見掛けの降下速度Ａと実際の降下
速度Ｂの対比から装入物の炉心方向への流れ込み
量を知ることができる。即ち実際の降下速度Ｂに
対して見掛けの降下速度Ａが大きいほど流れ込み
量が大きく、反対にその差が小さいほど流れ込み
量は小さいことになる。尚上記では見掛けの降下
速度Ａと実際の降下速度Ｂの測定期間を同期させ
ているが、実際の降下速度を別のチヤージの相当
する時期に測定してもよい。 From the comparison between the apparent descent speed A obtained in this way and the actual descent speed B, the amount of the charge flowing toward the core can be determined. That is, the larger the apparent descending speed A is relative to the actual descending speed B, the larger the amount of inflow, and conversely, the smaller the difference, the smaller the amount of inflow. In the above, the measurement period of the apparent descent speed A and the actual descent speed B is synchronized, but the actual descent speed may be measured at a corresponding time of another charge.
［実施例］
以下本発明の実施例方法を第１図と参照しなが
ら説明する。[Example] An example method of the present invention will be described below with reference to FIG. 1.
第１図ａは、大ベル３上に装入物５を貯留して
いる状態を示しており、この状態から第１図ｂに
示す如く大ベル３を降下させると、装入物５は落
下し、アーマープレート８に当たつて規制されな
がら原料層４上に落下する。こうして１バツチ分
の装入が完了すると第１図ｃに示す如く炉内にラ
ンス９を装入して先端に重錘７を有するワイヤ６
をセンス９から垂下させ、原料層４上に着床させ
る。 Fig. 1a shows a state in which the charge 5 is stored on the large bell 3, and when the large bell 3 is lowered from this state as shown in Fig. 1b, the charge 5 falls. Then, it hits the armor plate 8 and falls onto the raw material layer 4 while being regulated. When charging for one batch is completed in this way, a lance 9 is inserted into the furnace as shown in FIG.
is suspended from the sense 9 and is deposited on the raw material layer 4.
この状態から見掛けの降下速度Ａを測定（追従
測定）するに当たつては、原料層４上に重錘７を
載せたまま一定時間原料層４の動きに追従させ
る。この間に装入物のなだれが発生すると重錘７
は第１図ｄに示す様に流される。そして一定時間
後のワイヤ繰出し量を求めると見掛けの降下量が
分かり、測定時間を勘案して降下速度Ａを得るこ
とができる。 When measuring the apparent descending speed A from this state (following measurement), the weight 7 is placed on the raw material layer 4 and is made to follow the movement of the raw material layer 4 for a certain period of time. If an avalanche of the charge occurs during this time, the weight 7
is caused to flow as shown in Figure 1d. Then, by calculating the wire payout amount after a certain period of time, the apparent amount of descent can be found, and the descent speed A can be obtained by taking the measurement time into consideration.
一方実際の降下速度Ｂを測定するに当たつて
は、第１図ｃの状態から一旦重錘を引き上げ、必
要によりランス９も後退させ一定時間待機する。
そして待機中に第１図ｅに示す如く炉内でなだれ
が発生した後、所定の時刻に第１図ｆで示す如
く、再びランス９を進出させ且つ重錘７を垂下さ
せて原料層４の表層に着床させ、そのときの表層
位置を測定する。そして第１図ｃの表層位置と第
１図ｆの表層位置の差及び測定時刻の差から実際
の降下速度Ｂを求める。 On the other hand, when measuring the actual descending speed B, the weight is once lifted from the state shown in FIG.
After an avalanche occurs in the furnace during standby as shown in FIG. Place it on the surface layer and measure the surface layer position at that time. Then, the actual descent speed B is determined from the difference between the surface layer position in FIG. 1c and the surface layer position in FIG. 1f, and the difference in measurement time.
こうして得た見掛けの降下速度Ａと実際の降下
速度Ｂの差を装入物表層の炉心方向への流れ込み
速度とする。 The difference between the apparent descent speed A obtained in this way and the actual descent speed B is defined as the flow speed of the charge surface layer toward the core.
ところで操炉状態を示す指標の１つとして炉口
がス温度分布があり、炉口ガス温度分布が第３図
に実線で示す如く炉心部近傍でかなりの高温を示
し炉心から少しはずれると急激に温度が低下する
様な分布を示す場合には、炉心部のガスの流れ所
謂中心流が強く操炉状態は一般に良好となる。こ
れに対し第３図に破線で示す如く炉心部近傍の炉
口ガス温度がそれ程高温ではなく炉壁側との温度
差が少ない分布を示す場合には中心流が緩やかで
操炉状態は一般に悪い。 By the way, one of the indicators of reactor operation status is the gas temperature distribution at the reactor mouth. As shown by the solid line in Figure 3, the temperature distribution at the reactor mouth is quite high near the reactor core, and as it moves slightly away from the reactor core, the temperature suddenly increases. When the temperature shows a decreasing distribution, the gas flow in the reactor core, the so-called central flow, is strong and the operating condition of the reactor is generally good. On the other hand, as shown by the broken line in Figure 3, when the furnace mouth gas temperature near the reactor core is not so high and the temperature difference between it and the reactor wall side is small, the central flow is slow and the reactor operation condition is generally poor. .
この様に操炉状態の良否は炉口ガス温度分布に
よつて知ることができるが、操炉状態と炉内装入
物積層状態の関係は必ずしも明らかではなかつ
た。そこで操炉状態が良好な場合（中心流が鋭い
場合）と操炉状態が悪い場合（中心流が緩やかな
場合）について夫々本発明方法による炉内状況検
出を行なつたところ第４図ａ，ｂに示す結果が得
られた。尚実験は重錘が８個の多点型プロフイー
ルメーターを使用して行なつた。第４図ａに示す
様に中心流が鋭い場合には、見掛けの降下速度Ａ
と実際の降下速度Ｂの差即ち流れ込み速度は小さ
く、しかも炉心側と炉壁側でその値はほぼ一定で
あつた。これに対し第４図ｂに示す様に中心流が
緩やかな場合には見掛けの降下速度Ａと実際の降
下速度Ｂの差は大きく炉心側に近づく程その値は
大きくなつている。即ち流れ込み速度が大きい場
合に中心流が緩やかとなつて操炉状態の悪化をま
ねいている。 As described above, the quality of the operating condition of the furnace can be determined by the gas temperature distribution at the furnace mouth, but the relationship between the operating condition of the furnace and the stacking condition of the contents inside the furnace is not always clear. Therefore, we used the method of the present invention to detect the condition inside the reactor when the reactor operating condition was good (when the center flow was sharp) and when the reactor operating condition was poor (when the center flow was gentle), and the results showed the results shown in Figure 4a. The results shown in b were obtained. The experiment was conducted using a multi-point profile meter with eight weights. When the central flow is sharp as shown in Figure 4a, the apparent rate of descent A
The difference between the actual descending speed B, that is, the inflow speed, was small, and its value was almost constant between the core side and the reactor wall side. On the other hand, as shown in FIG. 4b, when the central flow is gentle, the difference between the apparent descending speed A and the actual descending speed B is large, and the value increases as it approaches the core side. That is, when the inflow velocity is high, the central flow becomes gentle, leading to deterioration of furnace operating conditions.
又本発明方法によつて検出される流れ込み速度
と炉口ガス温度の定量的関係は、炉心部において
第５図に示す通りであつた。即ち炉心部流れ込み
速度が１〜２ｍ／hrのときには炉心部炉口ガス温
度は約650℃と高く、第３図からも理解される様
に中心流が鋭い状態を示している。しかるに炉心
部流れ込み速度が増加するにつれて炉心の炉口ガ
ス温度は増加し流れ込み速度がおよそ10ｍ／Hr
以上になると250℃まで低下し以降同温度で推移
している。 Furthermore, the quantitative relationship between the inflow velocity and the furnace mouth gas temperature detected by the method of the present invention was as shown in FIG. 5 in the reactor core. That is, when the core flow rate is 1 to 2 m/hr, the core mouth gas temperature is as high as about 650 DEG C., and as can be seen from FIG. 3, the center flow is sharp. However, as the inflow velocity into the reactor core increases, the gas temperature at the mouth of the reactor increases, and the inflow velocity reaches approximately 10 m/Hr.
When the temperature exceeds that level, the temperature drops to 250℃ and has remained at the same temperature ever since.
以上の様に炉内装入物の流れ込み速度と炉口ガ
ス温度即ち炉内ガス流れの間には密接な関係が認
められる。尚炉内ガス流れに変化を与える要因と
しては流れ込み現象以外にも例えば軟化融着帯形
状の変化、炉心コークスの変化等があり、炉内ガ
ス流れが中心流の緩やかな流れになつたとしても
その原因が何であるかによつて対処の仕方が変わ
つてくる。しかるに本発明方法により炉内状況を
検出すると装入物のなだれについてはこれを確実
に把握することができるので、炉況の悪化がなだ
れによるものかどうかを知ることができ、結局装
入状況の変更により炉況を改善することができ
る。 As described above, there is a close relationship between the flow rate of the contents in the furnace and the gas temperature at the furnace mouth, that is, the gas flow in the furnace. In addition to the inflow phenomenon, there are other factors that change the gas flow in the furnace, such as changes in the shape of the softened cohesive zone and changes in core coke, so even if the gas flow in the furnace becomes a gentle central flow, The way to deal with it will depend on what the cause is. However, by detecting the situation inside the furnace using the method of the present invention, it is possible to reliably know about the avalanche of the charging material, so it is possible to know whether the deterioration of the furnace condition is due to the avalanche, and ultimately the charging situation can be determined. Changes can improve furnace conditions.
尚上記の説明はベル装入方式を中心として進め
てきたが、ベルレス装入方式の場合であつても同
様に適用し得ることは言うまでもない。 Although the above explanation has focused on the bell charging method, it goes without saying that the same applies to the bellless charging method as well.
［発明の効果］
本発明は以上の様に構成されており、以下要約
する効果を得ることができる。[Effects of the Invention] The present invention is configured as described above, and can obtain the effects summarized below.
(1) 見掛けの降下速度と実際の降下速度の差によ
り、炉壁側から炉心側へ向かう装入物の流れ込
み速度を定量的に検出することができる。(1) The velocity of the charge flowing from the reactor wall side to the reactor core side can be quantitatively detected by the difference between the apparent descending speed and the actual descending speed.
(2) 上記装入物の流れ込み速度は炉内ガスの流れ
と密接な関係があり、流れ込み速度が大きくな
るほど中心流は緩やかとなり操炉状態が悪化す
る。そこで炉内ガス流れが悪化した場合に本発
明方法により流れ込み速度を測定することによ
りガス流れ悪化の原因が流れ込みによるものか
どうかを判定することができる。(2) The flow rate of the above-mentioned charges is closely related to the flow of gas in the furnace, and the higher the flow rate, the slower the central flow and the worse the furnace operation condition. Therefore, when the gas flow in the furnace deteriorates, by measuring the inflow velocity using the method of the present invention, it is possible to determine whether or not the cause of the gas flow deterioration is due to inflow.
(3) 上記判定によつて流れ込みが主原因であると
認められると、アーマープレート等を操作して
装入状況を変更することにより流れ込みの緩和
をはかる等の対処を施せば、操炉状態を改善す
ることも可能となる。(3) If the above judgment confirms that the inflow is the main cause, the operating condition of the reactor can be improved by taking measures such as manipulating the armor plate, etc. to change the charging situation to alleviate the inflow. It is also possible to make improvements.
第１図は本発明の実施例方法を説明する為のフ
ロー図、第２図は従来の炉内状況検出方法を説明
する為の模式図、第３図は操炉状態が良好である
場合と悪化した場合の炉口ガス温度分布を示すグ
ラフ、第４図ａは中心流が鋭い場合の見掛けの降
下速度Ａと実際の降下速度Ｂの分布を示すグラ
フ、第４図ｂは中心流が緩やかな場合の分布を示
すグラフ、第５図は炉心部における流れ込み速度
と炉口ガス温度の定量的関係を示すグラフであ
る。
１……鉄皮、２……耐火材、３……大ベル、４
……原料層、５……装入物、６……ワイヤ、７…
…重錘、８……アーマープレート、９……ラン
ス、１０……貫通孔。
Fig. 1 is a flow diagram for explaining the method according to the embodiment of the present invention, Fig. 2 is a schematic diagram for explaining the conventional method for detecting the condition inside the reactor, and Fig. 3 shows the case when the reactor is in good operating condition. Graph showing the furnace mouth gas temperature distribution in the case of deterioration. Figure 4a is a graph showing the distribution of the apparent rate of descent A and actual rate of descent B when the central flow is sharp. Figure 4b is the graph showing the distribution of the apparent rate of descent A and the actual rate of descent B when the central flow is gentle. FIG. 5 is a graph showing the quantitative relationship between the inflow velocity in the reactor core and the reactor mouth gas temperature. 1...Iron skin, 2...Fireproof material, 3...Large bell, 4
... Raw material layer, 5 ... Charge, 6 ... Wire, 7 ...
...Weight, 8...Armor plate, 9...Lance, 10...Through hole.
Claims (1)
を検知するに当たり、炉内装入物表層上に重錘を
置いたまま装入物表層の変化に応じて重錘を追従
させることにより装入物表層の見掛けの降下速度
を検出すると共に、接触又は非接触型レベル計を
用いて装入物表層の実際の降下速度を求め、見掛
けの降下速度と実際の降下速度から装入物表層の
挙動を検出することを特徴とする竪型炉内装入物
の挙動検出方法。1. When detecting the surface layer of the charge material using a suspended weight wire, the weight is placed on the surface layer of the charge material and is moved to follow changes in the surface layer of the charge material. The apparent rate of descent of the surface layer of the charge is detected, and the actual rate of descent of the surface layer of the charge is determined using a contact or non-contact level meter. 1. A method for detecting the behavior of an inclusion in a vertical furnace, the method comprising detecting the behavior of a vertical furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7881086A JPS62235404A (en) | 1986-04-05 | 1986-04-05 | Detection of behavior of charge in vertical type furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7881086A JPS62235404A (en) | 1986-04-05 | 1986-04-05 | Detection of behavior of charge in vertical type furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62235404A JPS62235404A (en) | 1987-10-15 |
| JPH0586446B2 true JPH0586446B2 (en) | 1993-12-13 |
Family
ID=13672198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7881086A Granted JPS62235404A (en) | 1986-04-05 | 1986-04-05 | Detection of behavior of charge in vertical type furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62235404A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004050941A1 (en) | 2002-11-30 | 2004-06-17 | Sms Demag Aktiengesellschaft | Device and method for hot-dip coating a metal strand |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006265647A (en) * | 2005-03-24 | 2006-10-05 | Nippon Steel Corp | Method for determining distribution state of charged material in blast furnace |
| JP5610824B2 (en) * | 2009-04-21 | 2014-10-22 | 新日鐵住金株式会社 | SOUNDING DEVICE CONTROL METHOD AND SOUNDING DEVICE CONTROL DEVICE |
| JP5655798B2 (en) * | 2012-02-01 | 2015-01-21 | 新日鐵住金株式会社 | Method for measuring thickness distribution of blast furnace charge |
-
1986
- 1986-04-05 JP JP7881086A patent/JPS62235404A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004050941A1 (en) | 2002-11-30 | 2004-06-17 | Sms Demag Aktiengesellschaft | Device and method for hot-dip coating a metal strand |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62235404A (en) | 1987-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SE447997B (en) | SET TO REGULATE THE BATTLE EDUCATION IN AN LD CONVERTER | |
| JPH0586446B2 (en) | ||
| EP1029931A1 (en) | Method of operating blast furnace | |
| US20190136334A1 (en) | Device and method for sensing a conveying rate of a liquid material | |
| JPH11281467A (en) | Surface level measuring device for molten metal | |
| JPS58727B2 (en) | Estimation method of cohesive zone shape in blast furnace | |
| JPH0424404B2 (en) | ||
| JPS5862570A (en) | Detection of falling speed distribution for charge in blast furnace | |
| JP3794211B2 (en) | Method for evaluating mud material at blast furnace outlet and opening method for outlet | |
| JP2012214830A (en) | Method for measuring falling locus of charging object in blast furnace and metering rod | |
| JPS5852411A (en) | Measuring method for distribution of charging materials in blast furnace | |
| JPS6040484B2 (en) | Method for understanding charging and falling status of blast furnace raw materials | |
| JPH0754026A (en) | Method for measuring descending position of charged material in blast furnace | |
| JPS6028678Y2 (en) | Blast furnace furnace condition measuring device | |
| JPS599115A (en) | Detection of descending behavior and heaped structure of charge in blast furnace | |
| JPS6038446B2 (en) | Method for detecting burden deposition distribution in blast furnace | |
| JPH0623407B2 (en) | Bellless Blast Furnace Raw Material Input Position Measurement Method | |
| JPH0598324A (en) | Method for counting charging time of raw material in bell-less blast furnace charging device | |
| JPS6136564B2 (en) | ||
| JPS6191307A (en) | Detection of descending of charge in blast furnace | |
| JPS63195205A (en) | Method for charging raw material in bell type blast furnace | |
| JPS61201711A (en) | Operating method for blast furnace | |
| JPS6277413A (en) | Method for controlling position of welded zone of blast furnace | |
| JPS63238205A (en) | Method for deciding changing timing of bell liner in blast furnace | |
| JPS5848605B2 (en) | Method for measuring the layer thickness distribution, descending rate distribution, and boundary surface shape of the contents in the reduction melting furnace |