JPH0819488B2 - How to operate the sintering machine - Google Patents
How to operate the sintering machineInfo
- Publication number
- JPH0819488B2 JPH0819488B2 JP2007680A JP768090A JPH0819488B2 JP H0819488 B2 JPH0819488 B2 JP H0819488B2 JP 2007680 A JP2007680 A JP 2007680A JP 768090 A JP768090 A JP 768090A JP H0819488 B2 JPH0819488 B2 JP H0819488B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- sinter
- machine
- exhaust gas
- sintering
- 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 - Fee Related
Links
- 238000005245 sintering Methods 0.000 title claims description 28
- 238000000034 method Methods 0.000 claims description 13
- 230000000630 rising effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 30
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000007796 conventional method Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000012887 quadratic function Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、燒結機の操業方法に関する。TECHNICAL FIELD The present invention relates to a method for operating a sintering machine.
［従来の技術］ DL式燒結機で燒結鉱を製造する際、燒結鉱の品質、成
品歩留の向上を計るための種々の操業技術が開発され、
実施されている。従来から、燒結機の機長方向の排ガス
温度を測定し、排鉱部側の温度分布に近似する２次曲線
式を求め、温度が極大値となる位置（燒結終了点）が所
定位置になるように、パレットスピードを制御する方法
や、燒結機の排鉱部端における燒結層断面の残火層厚が
所定の厚さになるようにパレットスピードを制御する方
法が一般的に行われてきた。公開された特許文献として
は、燒結機機長方向の風箱の排ガス温度推移から幅方向
別に燒結終了点を検出し、幅方向平均成点を算出して、
それが目標値となるようにパレットスピードを調整する
方法（特開昭60−13032号公報）がある。[Prior Art] When manufacturing sinter using a DL sinter, various operating technologies have been developed to improve the quality of sinter and the yield of finished products.
It has been implemented. Conventionally, the exhaust gas temperature in the machine length direction of a sinter machine is measured, and a quadratic curve equation that approximates the temperature distribution on the mine ore side is obtained, so that the position where the temperature reaches a maximum value (sinter end point) becomes a predetermined position. In addition, a method of controlling the pallet speed and a method of controlling the pallet speed so that the afterglow layer thickness of the sinter layer cross section at the end of the smelting section of the sinter machine becomes a predetermined thickness have been generally used. As the published patent document, the sintering end point is detected for each width direction from the exhaust gas temperature transition of the wind box in the machine length direction of the sintering machine, and the average width direction score is calculated,
There is a method (Japanese Patent Laid-Open No. 60-13032) for adjusting the pallet speed so that it becomes a target value.
［発明が解決しようとする課題］ しかしながら、従来の燒結終了点でパレットスピード
を制御する方法については以下のような問題点がある。
排鉱部に近づくにしたがって燒結層の収縮が増大し、こ
の結果、燒結層の割れに起因する漏風、サイドウオール
と燒結層間での漏風が増加する。これらの漏風および排
鉱部端からの漏風は時間的に一様でなく、漏風量の変化
が大きい。このため、排鉱部即の排ガス温度の変動が大
きい。すなわち、燒結層の燒結状態に変化が無くとも、
見掛けの排ガス温度が変化し、そのため、このような排
ガス温度に基づいて算出される燒結終了点が変化し、パ
レットスピードを変化させてしまう。この結果、生産率
の低下および歩留りを悪化させるという問題点がある。[Problems to be Solved by the Invention] However, the conventional method of controlling the pallet speed at the end of sintering has the following problems.
The contraction of the sintered layer increases as it approaches the mine ore, and as a result, the air leakage due to the cracking of the sintered layer and the air leakage between the side wall and the sintered layer increase. These air leaks and air leaks from the end of the ore discharge part are not uniform in time, and the amount of air leak changes greatly. Therefore, the temperature of the exhaust gas fluctuates immediately at the mine ore. That is, even if there is no change in the sintered state of the sintered layer,
The apparent exhaust gas temperature changes, so that the sintering end point calculated based on such exhaust gas temperature changes, which changes the pallet speed. As a result, there are problems that the production rate is lowered and the yield is deteriorated.
一方、排鉱部端の燒結層断面の残火の層厚を一定にす
る方法は、残火層厚を検出するモニターカメラの感度が
経時的に変化すること、および排鉱部は発塵が著しく、
測定精度が悪いため正確なパレットスパード制御ができ
ないという問題点がある。On the other hand, the method of making the afterglow layer thickness of the sintered layer section at the end of the mine section constant is that the sensitivity of the monitor camera that detects the afterglow layer thickness changes with time, and that the mine section does not generate dust. Remarkably,
There is a problem that accurate pallet spade control cannot be performed due to poor measurement accuracy.
［課題を解決するための手段］ 本発明は上記のような問題点を解決しようとするもの
で、一つは燒結機の機長方向複数箇所の排ガス温度を測
定し、該測定温度から機長方向の排ガス温度曲線式を求
め、該温度曲線の温度上昇開始点から燒結終了点の間で
あって、所定温度になる位置を求め、該位置が設定位置
になるように燒結機のパレットスピードを制御すること
を特徴とする燒結機の操業方法であり、他のものは燒結
機の機長方向の複数列の排ガス温度曲線式を求め、各列
の排ガス温度曲線式について、該温度曲線の温度上昇開
始点から燒結終了点の間であって、所定温度になる位置
を求め、それらの位置の平均位置またはそれらの位置の
うち点火箱から最も離れた位置が設定位置になるように
燒結機にパレットスピードを制御することを特徴とする
燒結機の操業方法である。そして、前記方法において、
所定温度を150〜300℃の範囲にするのが望ましい。[Means for Solving the Problem] The present invention is intended to solve the above problems, and one is to measure exhaust gas temperatures at a plurality of positions in the machine length direction of a sinter, and measure the temperature from the measured temperature in the machine length direction. The exhaust gas temperature curve formula is obtained, the position between the temperature rising start point and the sintering end point of the temperature curve, where the predetermined temperature is reached, is calculated, and the pallet speed of the sintering machine is controlled so that the position becomes the set position. Is a method of operating a sintering machine, characterized in that the other one obtains the exhaust gas temperature curve formula of a plurality of columns in the machine length direction of the sintering machine, the exhaust gas temperature curve formula of each row, the temperature rise starting point of the temperature curve From the to the sintering end point, find the position that reaches the predetermined temperature, and set the pallet speed to the sintering machine so that the average position of those positions or the position farthest from the ignition box among those positions becomes the set position. To control It is a characteristic method of operating a sintering machine. And in the above method,
It is desirable that the predetermined temperature be in the range of 150 to 300 ° C.
［作用］ 燒結機の機長方向（進行方向）の排ガス温度は、第３
図に示すように、排鉱部側、特に燒結終了点の前後で変
動（振れ）が大きいが、排ガス温度上昇開始点Ａから燒
結終了点の間は変動が小さい。従って、所定温度を排ガ
ス温度上昇開始点Ａから燒結終了点の間に設定すれば、
パレットスピードの適正な制御ができ、生産率および歩
留りの向上を計ることができる。[Operation] The exhaust gas temperature in the machine length direction (traveling direction) of the sintering machine is the third
As shown in the figure, the fluctuation (fluctuation) is large on the mine ore side, especially before and after the sintering end point, but small between the exhaust gas temperature rise start point A and the sintering end point. Therefore, if the predetermined temperature is set between the exhaust gas temperature rise start point A and the sintering end point,
The pallet speed can be controlled properly, and the production rate and yield can be improved.
［実施例］ 本発明の実施例を以下に詳細に説明する。第１図は燒
結機の排ガス温度分布の例を示すグラフである。この例
は風箱数が23個ある燒結機の例である。燒結機の排ガス
温度は、装入された原料層の上面に点火された御、層中
に燃焼帯ができ、燃焼帯が降下してゆくにしたがって、
上昇するものであるが、有効機長の70％までは排ガス温
度は殆ど上昇せず、80〜90℃で推移する。この後、排ガ
ス温度は上昇し、有効機長の約95％位に温度の最大点
（燒結機終了点、略記号BTPこの点の排ガス温度は、通
常350〜450℃である）が表れ、その後降下する。第１図
の例では風箱NO17まで、80℃、NO18で100℃に上昇し、
その後曲線（２次函数）的に上昇して最大400℃になっ
ている。[Examples] Examples of the present invention will be described in detail below. FIG. 1 is a graph showing an example of exhaust gas temperature distribution of a sintering machine. This example is an example of a sinter machine with 23 air boxes. The flue gas temperature of the sintering machine is ignited on the upper surface of the charged raw material layer, a combustion zone is formed in the layer, and as the combustion zone descends,
Although it rises, the exhaust gas temperature hardly rises up to 70% of the effective length and stays at 80 to 90 ° C. After this, the exhaust gas temperature rises, the maximum temperature point (sinter machine end point, abbreviated symbol BTP is usually 350-450 ° C) appears at about 95% of the effective length, and then falls. To do. In the example of Fig. 1, up to NO17 in the wind box, the temperature rises to 80 ℃ and NO18 to 100 ℃.
After that, it rises in a curve (quadratic function) and reaches a maximum of 400 ° C.
本発明の操業方法は、パレットスピードの制御指標位
置を排ガス温度変動の大きい燒結終了点を避け、排ガス
温度変動の小さい温度上昇開始点（Ａ）から燒結終了点
（Ｂ）の間に目標温度を設け、その目標温度になる風箱
位置を求め、その位置が、生産率、成品歩留を考慮して
定めた位置になるようにパレットスピードを制御するも
のである。パレットスピード制御は、具体的には演算機
を使用して、次のように行う。演算機に、排ガス温度上
昇開始点以降の３箇所の風箱温度を入力し、（１）式の
係数A,B,Cを求めて、排ガス温度曲線式を確定し、該排
ガス温度曲線式から目標温度になる風箱位置を演算し
て、これが設定位置になるようにパレットスピードを制
御する。In the operating method of the present invention, the pallet speed control index position is set so as to avoid the sintering end point where the exhaust gas temperature fluctuation is large and to set the target temperature between the temperature rising start point (A) where the exhaust gas temperature fluctuation is small and the sintering end point (B). The pallet speed is controlled so that the wind box position at which the target temperature is reached is obtained and the position is set at a position determined in consideration of the production rate and the product yield. Specifically, the pallet speed control is performed as follows using a computing machine. Input the temperature of the wind box at three locations after the start point of the exhaust gas temperature rise into the computer, determine the coefficients A, B, and C of the equation (1), and determine the exhaust gas temperature curve formula. The wind box position that reaches the target temperature is calculated, and the pallet speed is controlled so that this is the set position.
T1＝AiP▲2 i▼＋BiPi＋Ci （１） ここに、Ti…風箱位置Piにおける排ガス温度 Pi…風箱位置 Ai,Bi,Ci……それぞれ、２次項、１次項の係数、定数 添字ｉ…風箱の幅方向に排ガス温度計を複数設けた場合
の列数（第４図参照） 排ガス温度の変動ができるだけ少いこと、および燒結
速度の変化を早く把握できることを考慮すれば、目標温
度は排ガス温度が150〜300℃の範囲内（第１図でＣ〜Ｄ
の範囲）に決めることがより望ましい。T 1 = AiP ▲ 2 i ▼ ＋ BiPi ＋ Ci (1) Here, Ti ... Exhaust gas temperature at wind box position Pi ... Wind box position Ai, Bi, Ci. The number of rows when multiple exhaust gas thermometers are installed in the width direction of the wind box (see Fig. 4) Considering that the fluctuation in exhaust gas temperature is as small as possible and the change in sintering speed can be grasped quickly, the target temperature is Exhaust gas temperature is within the range of 150-300 ℃ (C-D in Fig. 1)
It is more desirable to determine the range).
排ガス温度を測定する温度センサーは、各風箱の中心
で機長方向に１列だけ設ける場合と、第４図のように、
風箱の幅方向に複数の温度センサーを設けて、機長方向
に複数列設ける場合がある。第２図は温度センサーを機
長方向に３列（第４図参照）設けて、各列毎の温度曲線
を求め、目標温度250℃に対応する風箱位置を求める様
子をグラフに示したものである。実際は演算機で（１）
式のTi＝250℃とし、Piを求める。この場合、目標温度2
50℃に対応する風箱位置は、生産率を重視するときは
P1,P2,P3の平均値とし、歩留りを重視するときは、P1,P
2,P3の最大値とする。The temperature sensor for measuring the exhaust gas temperature is provided in the center of each wind box only in one row in the machine length direction, and as shown in FIG.
There are cases where a plurality of temperature sensors are provided in the width direction of the wind box and a plurality of rows are provided in the machine length direction. Fig. 2 is a graph showing how the temperature sensors are installed in three rows in the machine length direction (see Fig. 4), the temperature curve for each row is obtained, and the wind box position corresponding to the target temperature of 250 ° C is obtained. is there. Actually, it is a computer (1)
In the equation, Ti = 250 ° C and Pi is calculated. In this case, the target temperature 2
The wind box position corresponding to 50 ° C is used when the production rate is important.
P 1, the average value of P 2, P 3, when emphasizing yield, P 1, P
The maximum value of 2 and P 3 .
なお、自動制御運転を行う場合、従来と同じように、
次の条件を入れて運転する。In addition, when performing automatic control operation, as in the past,
Operate under the following conditions.
（１） 主ダクトの吸引負圧上限で、パレットスピード
を低下する。(1) Decrease the pallet speed at the upper limit of suction negative pressure of the main duct.
（２） 主ダクト電気集塵機前の排ガス温度下限で、パ
レットスピードを低下する。(2) Decrease the pallet speed at the lower limit of exhaust gas temperature in front of the main duct electric dust collector.
本発明の方法（条件；目標温度250℃、設定風箱位置2
0.2）と従来方法の生産率を比較したものが第１表であ
る。ここで、従来法（１）は従来の燒結終了点でパレッ
トスピードを制御する方法、従来法（２）は排鉱部端の
燒結層断面の残火の層厚を一定にする方法である。本発
明方法による方が0.05T/m2hの向上が得られた。Method of the present invention (conditions: target temperature 250 ℃, set wind box position 2
Table 1 shows a comparison of the production rate between the conventional method and 0.2). Here, the conventional method (1) is a method of controlling the pallet speed at the conventional sintering end point, and the conventional method (2) is a method of making the layer thickness of the afterglow of the sintered layer section at the end of the mine ore part constant. An improvement of 0.05 T / m 2 h was obtained by the method of the present invention.
［発明の効果］ 本発明は、排ガス温度の変動の少ない温度上昇開始点
と燒結終了点の間に目標温度を設定し、この温度に対応
する位置を設定位置になるようにパレットスピードを制
御するようにしたから、従来方法に比較して、生産率、
成品歩留が向上するという効果がある。 [Advantages of the Invention] According to the present invention, a target temperature is set between a temperature rising start point and a sintering end point where the exhaust gas temperature does not fluctuate, and a pallet speed is controlled so that a position corresponding to this temperature becomes a set position. Therefore, compared with the conventional method, the production rate,
This has the effect of improving the product yield.
第１図は燒結機の機長方向排ガス温度曲線の一例を示す
グラフ図、第２図は温度センサーを機長方向に３列設け
た場合の排ガス温度曲線を示すグラフ図、第３図は排ガ
ス温度曲線と風箱位置における排ガス温度の変動を示す
グラフ図、第４図は機長方向に温度センサーを複数列設
けたときの温度センサーの配置を示す図である。FIG. 1 is a graph showing an example of the exhaust gas temperature curve in the machine length direction of the sintering machine, FIG. 2 is a graph showing the exhaust gas temperature curve when temperature sensors are provided in three rows in the machine length direction, and FIG. 3 is an exhaust gas temperature curve. And FIG. 4 is a graph showing fluctuations in exhaust gas temperature at the position of the wind box, and FIG. 4 is a diagram showing arrangement of temperature sensors when a plurality of rows of temperature sensors are provided in the machine length direction.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 福与 寛 東京都千代田区丸の内１丁目１番２号 日 本鋼管株式会社内 (72)発明者 和田 隆 東京都千代田区丸の内１丁目１番２号 日 本鋼管株式会社内 審査官 中村 朝幸 (56)参考文献 特開 昭55−2725（ＪＰ，Ａ) 特開 昭60−13032（ＪＰ，Ａ) 特公 昭43−14567（ＪＰ，Ｂ１) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Fukuyo 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Takashi Wada 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Asahi Nakamura (56) Referencer, Nihon Kokan Co., Ltd. References JP-A-55-2725 (JP, A) JP-A-60-13032 (JP, A) JP-B-43-14567 (JP, B1)
Claims (6)
測定し、該測定温度から機長方向の排ガス温度曲線式を
求め、該温度曲線の温度上昇開始点から燒結終了点の間
であって、所定温度になる位置を求め、該位置が設定位
置になるように燒結機のパレットスピードを制御するこ
とを特徴とする燒結機の操業方法。Claim: What is claimed is: 1. Exhaust gas temperatures at a plurality of machine length directions of a sinter machine are measured, an exhaust gas temperature curve formula in the machine length direction is obtained from the measured temperatures, and the temperature curve starting point from the temperature rise start point to the sinter end point is measured. A method for operating a sinter, wherein a position at which a predetermined temperature is reached is obtained, and the pallet speed of the sinter is controlled so that the position becomes a set position.
の間の温度に設定する燒結機の操業方法。2. The predetermined temperature according to claim 1, which is 150 to 300 ° C.
How to operate the sinter set to a temperature between.
線式を求め、各列の排ガス温度曲線式について、該温度
曲線の温度上昇開始点から燒結終了点の間であって、所
定温度になる位置を求め、それらの位置の平均位置が設
定位置になるように燒結機のパレットスピードを制御す
ることを特徴とする燒結機の操業方法。3. An exhaust gas temperature curve formula for a plurality of columns in the machine length direction of a sinter machine is obtained, and the exhaust gas temperature curve formula for each column is between the temperature rising start point and the sintering end point of the temperature curve, and a predetermined temperature. The method of operating a sinter machine is characterized in that the pallet speed of the sinter machine is controlled so that the average position of those positions becomes the set position.
の間の温度に設定する燒結機の操業方法。4. The predetermined temperature according to claim 3, wherein the predetermined temperature is 150 to 300 ° C.
How to operate the sinter set to a temperature between.
線式を求め、各列の排ガス温度曲線式について、該温度
曲線の温度上昇開始点から燒結終了点の間であって、所
定温度になる位置を求め、それらの位置のうち点火箱か
ら最も離れた位置が設定位置になるように燒結機のパレ
ットスピードを制御することを特徴とする燒結機の操業
方法。5. An exhaust gas temperature curve equation for a plurality of rows in the machine length direction of a sinter machine is obtained, and the exhaust gas temperature curve equation for each row is between the temperature rising start point and the sintering end point of the temperature curve, and the predetermined temperature is reached. The method for operating a sintering machine is characterized in that the pallet speed of the sintering machine is controlled so that the position farthest from the ignition box becomes the set position.
の間の温度に設定する燒結機の操業方法。6. The predetermined temperature according to claim 5, which is 150 to 300 ° C.
How to operate the sinter set to a temperature between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007680A JPH0819488B2 (en) | 1990-01-17 | 1990-01-17 | How to operate the sintering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007680A JPH0819488B2 (en) | 1990-01-17 | 1990-01-17 | How to operate the sintering machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03211241A JPH03211241A (en) | 1991-09-17 |
| JPH0819488B2 true JPH0819488B2 (en) | 1996-02-28 |
Family
ID=11672506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007680A Expired - Fee Related JPH0819488B2 (en) | 1990-01-17 | 1990-01-17 | How to operate the sintering machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0819488B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4826129B2 (en) * | 2005-04-27 | 2011-11-30 | Ｊｆｅスチール株式会社 | Method for producing sintered ore |
| JP7853584B2 (en) * | 2022-11-30 | 2026-04-30 | 日本製鉄株式会社 | Method for estimating firing index and method for operating a Dwightroid sintering machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS552725A (en) * | 1978-06-21 | 1980-01-10 | Nippon Kokan Kk <Nkk> | Control method for dl sintering machine |
| JPS6013032A (en) * | 1983-07-01 | 1985-01-23 | Sumitomo Metal Ind Ltd | Method for controlling calcination point with sintering machine |
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1990
- 1990-01-17 JP JP2007680A patent/JPH0819488B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03211241A (en) | 1991-09-17 |
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