JPH0327604B2 - - Google Patents
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- Publication number
- JPH0327604B2 JPH0327604B2 JP10128483A JP10128483A JPH0327604B2 JP H0327604 B2 JPH0327604 B2 JP H0327604B2 JP 10128483 A JP10128483 A JP 10128483A JP 10128483 A JP10128483 A JP 10128483A JP H0327604 B2 JPH0327604 B2 JP H0327604B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- utilization rate
- temperature distribution
- gas
- temperature
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Blast Furnaces (AREA)
Description
【発明の詳細な説明】
本発明は高炉炉径方向の位置別に炉高方向の温
度分布を検知する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of detecting temperature distribution in the furnace height direction for each position in the radial direction of a blast furnace.
高炉内の炉高方向温度分布は炉径方向の位置、
例えば中心部、中間部、炉壁部などによつて、し
ばらく異なつた分布を示すことはよく知られてい
る。これは炉径方向の各位置によつて還元ガス流
量や鉱石、ヨークスなどの装入物の降下速度が違
う、即ち熱流比が違うためである。 The temperature distribution in the furnace height direction in the blast furnace is determined by the position in the furnace radial direction,
It is well known that, for example, the distribution varies depending on the center, middle, furnace wall, etc. This is because the reducing gas flow rate and the descending speed of charges such as ore and yokes differ depending on the position in the radial direction of the furnace, that is, the heat flow ratio differs.
最近高炉塊状帯の炉壁部近くに、500〜600℃の
低温熱保存帯を有する温度分布の出現する例が報
告されている。 Recently, an example has been reported in which a temperature distribution with a low-temperature thermal storage zone of 500 to 600°C appears near the furnace wall of the blast furnace block zone.
低温熱保存帯の形勢による高炉操業への影響は
次のように考えられる。500〜600℃の温度域は丁
度焼結鉱の還元粉化域に相当するための高炉塊状
帯に低温熱保存帯が生成すると、焼結鉱の還元粉
化が助長され、ここで生成した粉は降下とともに
下部の炉腹から朝顔部に至り、炉壁部に降下速度
の遅い停滞層を形成する。この停滞層は長時間存
在すると表面層がメタル化し、付着物となる。炉
腹から朝顔部の炉壁部にこのような停滞層が形成
されると、装入物の降下領域が狭められたことに
なるため、降下異常を起しやすく、棚、スリツプ
の原因となる。 The influence of the condition of the low-temperature thermal storage zone on blast furnace operation can be considered as follows. The temperature range of 500 to 600℃ corresponds to the reduction and pulverization area of sintered ore, so when a low-temperature thermal storage zone is formed in the blast furnace block zone, reduction and pulverization of sintered ore is promoted, and the powder produced here is As it descends, it reaches the morning glory from the lower belly of the furnace, forming a stagnant layer with a slow descending speed on the furnace wall. If this stagnant layer exists for a long time, the surface layer becomes metal and becomes a deposit. When such a stagnant layer forms on the furnace wall from the furnace belly to the morning glory section, the descending area of the charge is narrowed, making it easy to cause descending abnormalities, causing shelves and slips. .
このように塊状帯における低温熱保存帯の形成
は高炉操業に悪影響を与えるので、高炉操業の安
定化を計るためには低温保存帯の形成防止及び形
成された低温熱保存帯の早期解消が不可欠であ
る。 In this way, the formation of a low-temperature storage zone in a lumpy zone has a negative impact on blast furnace operation, so it is essential to prevent the formation of a low-temperature storage zone and quickly eliminate the formed low-temperature storage zone in order to stabilize blast furnace operation. It is.
低温保存帯の形成は炉径方向のその位置におけ
る熱流比が大きいことに起因すると考えられるの
で、低温熱保存帯の存在を検知できれば、該検知
に基づきその位置の装入鉱石／ヨークスを下げる
ことなどの手段によつて熱流比を低減して低温熱
保存帯を解消することができる。そのためには先
ず炉径方向の位置毎に炉高方向温度分布を検知す
ることが必要である。 The formation of a cold storage zone is thought to be due to the large heat flow ratio at that position in the furnace radial direction, so if the presence of a low temperature storage zone can be detected, the charged ore/yoke at that position can be lowered based on this detection. By reducing the heat flow ratio, the low temperature thermal storage zone can be eliminated. To do this, it is first necessary to detect the temperature distribution in the furnace height direction at each position in the furnace radial direction.
この高炉内の炉高方向温度分布を検知する方法
には、現在は垂直ゾンデによる測定方法があるの
みである。垂直ゾンデによる炉高方向温度分布の
測定では、炉径方向の位置はせいぜい中心、中間
および炉壁部というようなおおまかな分け方の測
定しかできない。これは炉頂から挿入される垂直
ゾンデの位置が鉱石やヨークスの装入時に狂つて
しまうことや、垂直ゾンデ先端部（測定部）の高
炉内での降下挙動が必ずしも明確でないことによ
る。さらに垂直ゾンデによる測定には多大の設
備、経費および労力を要し、日常の高炉操業管理
に使用するのは実際上困難である。 At present, the only method for detecting the temperature distribution in the furnace height direction inside the blast furnace is a measurement method using a vertical sonde. When measuring the temperature distribution in the furnace height direction using a vertical sonde, it is possible to only roughly measure the radial positions of the furnace, such as the center, middle, and furnace wall. This is because the position of the vertical sonde inserted from the top of the furnace is distorted when ore or yoke is charged, and the behavior of the vertical sonde tip (measuring section) as it descends inside the blast furnace is not always clear. Furthermore, measurement using a vertical sonde requires a large amount of equipment, expense, and labor, and is practically difficult to use for daily blast furnace operation management.
そこで本発明の目的は高炉の炉高方向温度分布
を炉径方向の位置別に簡便な手段によつて検知す
る方法を提供することであり、本発明方法は日常
の高炉操業管理に十分使用しうるものである。 Therefore, an object of the present invention is to provide a method for detecting the temperature distribution in the furnace height direction of a blast furnace by a simple means for each position in the furnace radial direction, and the method of the present invention can be fully used for daily blast furnace operation management. It is something.
而して、本発明の要旨は高炉炉頂部またはシヤ
フト上部において、炉径方向の複数点について、
炉内ガスを分析して水素利用率または水素利用
率／CO利用率を測定することにより、前記各測
定点における炉高方向の温度分布を検知する高炉
内温度分布検知方法である。 Therefore, the gist of the present invention is that, at the top of the blast furnace or the upper part of the shaft, at multiple points in the furnace radial direction,
This method detects the temperature distribution in the blast furnace by analyzing the gas in the furnace and measuring the hydrogen utilization rate or the hydrogen utilization rate/CO utilization rate to detect the temperature distribution in the furnace height direction at each of the measurement points.
本発明の態様を実施形態の１つを示す第１図に
よつて説明する。高炉シヤフト１の上部の装入物
２の中に水平ゾンデ３を挿入し、炉内ガスを炉径
方向の位置別に採取し、該採取ガスを分析計４に
よつて分析し、ガス成分（CO、CO2、H2、
H2O、N2）を求める。 Aspects of the present invention will be explained with reference to FIG. 1, which shows one of the embodiments. A horizontal sonde 3 is inserted into the charge 2 at the top of the blast furnace shaft 1, and the gas inside the furnace is sampled at different positions in the radial direction of the furnace.The sampled gas is analyzed by the analyzer 4, and the gas component (CO , CO 2 , H 2 ,
H 2 O, N 2 ).
ここで分析計４がガス中のH2O濃度を測定で
きない場合には、高炉操業条件からボツシユガス
成分（CO、H2、N2）を計算で求め、ボツシユガ
ス成分と分析計４で求めたガス成分（CO、CO2、
H2、N2）から計算によりH2O濃度を求める。 If the analyzer 4 cannot measure the H 2 O concentration in the gas, calculate the bolus gas components (CO, H 2 , N 2 ) from the blast furnace operating conditions, and compare the bolus gas components and the gas determined by the analyzer 4. Ingredients (CO, CO2 ,
H 2 O concentration is calculated from H 2 , N 2 ).
次にこのようにして測定したCO、CO2、H2、
H2O濃度から水素利用率（H2O（％）／（H2（％）
＋H2O（％））およびCO利用率（CO2（％）／
（CO（％）＋CO2（％））を計算する。 Next, CO, CO 2 , H 2 measured in this way,
From H 2 O concentration to hydrogen utilization rate (H 2 O (%) / (H 2 (%))
+H 2 O (%)) and CO utilization rate (CO 2 (%) /
Calculate (CO (%) + CO 2 (%)).
而して、これらの値によつて炉径方向位置別に
炉高方向温度分布を知得できることを、後記実験
により知つた。即ち、本発明は高炉炉頂部又はシ
ヤフト上部において炉径方向の１点の炉内ガスを
分析するだけでその測定点の炉高方向の温度分布
を検知できることを見い出すことによつて完成さ
れた発明である。 Through experiments described later, we found that these values can be used to obtain the temperature distribution in the furnace height direction for each position in the furnace radial direction. That is, the present invention was completed by discovering that by simply analyzing the gas in the furnace at one point in the furnace radial direction at the top of the blast furnace or the upper part of the shaft, it is possible to detect the temperature distribution in the furnace height direction at that measurement point. It is.
水平ゾンデ３の位置は第１図では装入物２の中
に挿入した例を示したが、装入面５の上方、つま
り炉頂部でも差しつかえない。また水平ゾンデ３
は固定式でもガス分析のたびに挿入する方式でも
よく、またその挿入長さは中心まで届く長さでも
あるいは直径全体と等しい長さでもよく、その長
さは任意であり、要は炉径方向の必要な測定位置
におけるガスが採取できる長さであればよい。 Although the position of the horizontal sonde 3 is shown in FIG. 1 as being inserted into the charge 2, it may also be placed above the charging surface 5, that is, at the top of the furnace. Also horizontal sonde 3
The can be fixed or inserted each time gas analysis is performed, and its insertion length can be long enough to reach the center or equal to the entire diameter, and its length can be arbitrary; The length may be sufficient as long as the gas can be sampled at the required measurement position.
次に本発明の原理を実験結果を基に説明する。 Next, the principle of the present invention will be explained based on experimental results.
本発明者等は高炉塊状帯における諸反応のシミ
ユレーターである、いわゆるボリス炉を用いて実
験して、塊状帯におけるH2の反応挙動を種々の
炉高方向温度分布とH2濃度（０〜12％）につい
て調べた結果、炉頂ガスを分析して得られる水素
利用率、あるいは水素利用率／CO利用率と温度
分布との間に明確な相関のあることを見出した。 The present inventors conducted experiments using the so-called Boris furnace, which is a simulator of various reactions in the blast furnace block zone, and investigated the reaction behavior of H 2 in the block zone with various temperature distributions in the furnace height direction and H 2 concentration (0 to 12 %), it was found that there is a clear correlation between the hydrogen utilization rate obtained by analyzing the furnace top gas, or the hydrogen utilization rate/CO utilization rate, and temperature distribution.
第２図は上記実験で得られた代表的な炉高方向
の３つの温度分布を、第３図はそれぞれの温度分
布と炉頂ガスの水素利用率との関係を、そして第
４図はそれぞれの温度分布と炉頂ガスの水素利用
率／CO利用率の関係を示す。 Figure 2 shows the three typical temperature distributions in the furnace height direction obtained in the above experiment, Figure 3 shows the relationship between each temperature distribution and the hydrogen utilization rate of the furnace top gas, and Figure 4 shows the respective temperature distributions. The relationship between the temperature distribution and the hydrogen utilization rate/CO utilization rate of the furnace top gas is shown.
第２図において1000℃の高温熱保存帯を有する
温度分布をＡタイプ、600℃に低温熱保存帯を有
する温度分布をＢタイプ、1000℃までゆるやかに
上昇してゆく温度分布をＣタイプとする。第３図
によると、水素利用率は温度分布Ａタイプ、Ｃタ
イプ、Ｂタイプの順に低くなる。また第４図によ
ると水素利用率／CO利用率は温度分布Ａタイプ、
Ｃタイプ、Ｂタイプの順に小さくなる。 In Figure 2, the temperature distribution with a high-temperature thermal storage zone of 1000℃ is type A, the temperature distribution with a low-temperature thermal storage zone of 600℃ is type B, and the temperature distribution that gradually increases to 1000℃ is type C. . According to FIG. 3, the hydrogen utilization rate decreases in the order of temperature distribution type A, type C, and type B. Also, according to Figure 4, the hydrogen utilization rate/CO utilization rate is temperature distribution type A,
The size decreases in the order of C type and B type.
又タイプＢの炉高方向温度分布において、低温
領域が長い程、水素利用率あるいは水素利用率／
CO利用率は小さくなることがわかつた。この理
由は低温領域に長くなる程、下記(1)式の水性ガス
シフト反応が進み、H2濃度又はCO2濃度が増加
するためと考えられる。 In addition, in the temperature distribution in the furnace height direction of type B, the longer the low temperature region, the lower the hydrogen utilization rate or the hydrogen utilization rate/
It was found that the CO utilization rate decreased. The reason for this is thought to be that the longer the temperature is in the low temperature region, the more the water gas shift reaction expressed by the following equation (1) progresses, and the H 2 concentration or CO 2 concentration increases.
H2O＋CO＝H2＋CO2 (1)
以上の実験結果からＢタイプの低温熱保存帯を
もつ温度分布は、炉項ガスの水素利用率、又は水
素利用率／CO利用率から知得できることが明ら
かになつた。 H 2 O + CO = H 2 + CO 2 (1) From the above experimental results, it is clear that the temperature distribution with a B-type low-temperature thermal storage zone can be determined from the hydrogen utilization rate of the furnace gas or the hydrogen utilization rate/CO utilization rate. It became clear.
第３図と第４図においては炉項ガスを分析した
結果の水素利用率と水素利用率／CO利用率を示
したが、実際上あまり還元の進まない600℃まで
第３図と第４図の関係は成立つ。したがつて水素
利用率あるいは水素利用率／CO利用率の値から
炉高方向の温度分布を検知する方法は炉頂ガスの
分析のみならず、シヤフト上部におけるガス分析
結果によつても可能である。 Figures 3 and 4 show the hydrogen utilization rate and hydrogen utilization rate/CO utilization rate as a result of analyzing the furnace gas. The relationship holds true. Therefore, it is possible to detect the temperature distribution in the furnace height direction from the value of the hydrogen utilization rate or hydrogen utilization rate/CO utilization rate, not only by analyzing the furnace top gas but also by using the gas analysis results at the top of the shaft. .
以上、実験結果を基にして本発明の原理を説明
したが、この説明から判るように本法によれば高
炉の炉径方向の複数ケ所のガス分析を行うだけの
簡単な方法により高炉塊状帯の炉高方向温度分布
を炉径方向の各位置で簡単に検知することがで
き、しかも本発明方法は簡単なので日常の高炉操
業管理に容易に取り入れることができ、低温熱保
存帯の防止と形成された低温保存帯の早期解消に
効果的に対処でき、高炉の安定操業に大いに役立
つという効果を有する。 The principle of the present invention has been explained above based on the experimental results. As can be seen from this explanation, according to the present method, blast furnace lumpy zone The temperature distribution in the furnace height direction can be easily detected at each position in the furnace radial direction, and since the method of the present invention is simple, it can be easily incorporated into daily blast furnace operation management. This has the effect of being able to effectively deal with the early elimination of the cold storage zone that has been stored, and greatly contributing to the stable operation of blast furnaces.
第１図は本発明の実施態様を示す概略図、第２
図は実験した代表的な炉高方向の温度分布状態を
示す図、第３図は炉高方向温度分布と水素利用率
の関係を示す図、第４図は炉高方向温度分布と水
素利用率／CO利用率の関係を示す図である。
１……高炉シヤフト、２……装入物、３……水
平ゾンデ、４……分析計、５……装入面。
FIG. 1 is a schematic diagram showing an embodiment of the present invention, FIG.
The figure shows the typical temperature distribution state in the furnace height direction during the experiment, Figure 3 shows the relationship between the furnace height direction temperature distribution and hydrogen utilization rate, and Figure 4 shows the furnace height direction temperature distribution and hydrogen utilization rate. FIG. 3 is a diagram showing the relationship between /CO utilization rate. 1... Blast furnace shaft, 2... Charge, 3... Horizontal sonde, 4... Analyzer, 5... Charging surface.
Claims (1)
径方向の複数点について炉内ガスを分析して、水
素利用率または水素利用率／CO利用率を測定す
ることにより、前記各測定点における炉高方向の
炉内温度分布を検知することを特徴とする高炉内
温度分布検知法。1 At the top of the blast furnace or the upper part of the shaft, the furnace gas is analyzed at multiple points in the radial direction of the furnace and the hydrogen utilization rate or hydrogen utilization rate/CO utilization rate is measured. A method for detecting temperature distribution in a blast furnace characterized by detecting temperature distribution in the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10128483A JPS59226109A (en) | 1983-06-07 | 1983-06-07 | Detection of temperature distribution in blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10128483A JPS59226109A (en) | 1983-06-07 | 1983-06-07 | Detection of temperature distribution in blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59226109A JPS59226109A (en) | 1984-12-19 |
| JPH0327604B2 true JPH0327604B2 (en) | 1991-04-16 |
Family
ID=14296555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10128483A Granted JPS59226109A (en) | 1983-06-07 | 1983-06-07 | Detection of temperature distribution in blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59226109A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013019706A (en) * | 2011-07-08 | 2013-01-31 | Jfe Steel Corp | Method and apparatus for measuring utilization rate of blast furnace gas |
| 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 |
-
1983
- 1983-06-07 JP JP10128483A patent/JPS59226109A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59226109A (en) | 1984-12-19 |
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