JPH03215630A - Operating method for sintering machine - Google Patents
Operating method for sintering machineInfo
- Publication number
- JPH03215630A JPH03215630A JP1089390A JP1089390A JPH03215630A JP H03215630 A JPH03215630 A JP H03215630A JP 1089390 A JP1089390 A JP 1089390A JP 1089390 A JP1089390 A JP 1089390A JP H03215630 A JPH03215630 A JP H03215630A
- Authority
- JP
- Japan
- Prior art keywords
- zone
- width direction
- sintered
- value
- exhaust 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.)
- Granted
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、製鉄業における焼結機の操業方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of operating a sintering machine in the steel industry.
［従来技術コ
従来焼結機の操業においては、被焼結帯の下面に流出す
る排ガスの温度の、機長方向の温度分布を調査して焼成
完了点を求め、この点が、できるだけ排鉱部（焼結機か
ら焼成終了後の鉱が排出される場所）に近接した場所に
留まるように、ライン速度を調節している。第２図は排
ガス温度の機長方向分布のパターンを示すグラフである
。横軸に機長方向の位置を、縦軸に排ガス温度をそれぞ
れ示す．図に示すように、排ガス温度は、当初は燃焼帯
が被焼結帯の上面にあるため定温を保持し、燃焼帯が下
面に近づくとともに温度が上昇を開始して、燃焼帯が下
面に達した位置ですなわち、焼結が終了した場所で、最
高温度に到達し、以後自然放冷によって下降する．この
温度パタンは巾方向に異なり、例えば被焼結帯の巾方向
中央部の焼結終了点と巾方向端部の焼結終了点とは必ず
しも一致しない．特公昭５４−１１７６３号公報におい
ては、機長方向の特定位置において、巾方向に複数の排
ガス温度計を配して、その測定値と予め定めた設定値と
を比較して、原料供給における巾方向分布を調節し、巾
方向に均一な焼結を行っている。[Conventional technology] In the operation of a conventional sintering machine, the temperature distribution of the exhaust gas flowing out to the bottom surface of the sintered zone in the machine length direction is determined to determine the sintering completion point, and this point is set as close to the ore discharge area as possible. The line speed is adjusted so that the line remains close to the sintering machine (where the ore is discharged from the sintering machine after firing). FIG. 2 is a graph showing the pattern of the exhaust gas temperature distribution in the machine length direction. The horizontal axis shows the position in the longitudinal direction, and the vertical axis shows the exhaust gas temperature. As shown in the figure, the exhaust gas temperature initially remains constant because the combustion zone is above the sintered zone, and as the combustion zone approaches the bottom, the temperature begins to rise until the combustion zone reaches the bottom. The maximum temperature is reached at the point where sintering is completed, and then it decreases due to natural cooling. This temperature pattern differs in the width direction; for example, the sintering end point at the widthwise center of the sintered band does not necessarily match the sintering end point at the widthwise ends. In Japanese Patent Publication No. 54-11763, a plurality of exhaust gas thermometers are arranged in the width direction at specific positions in the machine length direction, and the measured values are compared with predetermined set values to determine the width direction in raw material supply. The distribution is adjusted to achieve uniform sintering in the width direction.
［発明が解決しようとする課題］
しかしながら、従来技術においては下記の問題点がある
。すなわち、
従来技術においては、焼結機の機長方向の所定位置にお
いて排ガス温度の巾方向分布を測定しているが、第２図
に示すような温度パターンにおいては燃焼帯の発達状況
を誤認する可能性がある．第３図は巾方向中央部の温度
パターンｑと、巾方向端部の温度パターンｒを示すグラ
フである．今機長方向の位置Ｐにおいて、中央部の温度
Ｑを測定し、端部の温度Ｒを得たとする。点Ｒはグラフ
の最高点すなわち焼結終了点の右側にあるが、点Ｑは左
側にあるので、これらの値を比較することは、焼結終了
前の温度と終了後の温度を混同することになる．本発明
は上記の問題点を解決し、正確に焼結反応を制御できる
焼結機の操業方法を提案することをその目的とするもの
である，［課題を解決するための手段］
本発明に係る、焼結機の操業方法は、水平方向に移動し
ながら、上面より下面に燃焼帯が移動する被焼結帯を有
し、かつ該被焼結帯の上面から下面に空気を通風する手
段を有する焼結機の操業方法において、被焼結帯下面の
巾方向および進行方向に複数個配する排ガスの温度計に
よって排ガス温度を計測し、該排ガス温度が一定に保持
される帯域（以下初期定温帯域）と最大値を示す点（以
下焼結終了点）との中間にある指定値に排ガス温度を予
め定め、該指示値に対応する被焼結帯の水平方向におけ
る指示値対応位Ｗの、巾方向分布を求め、該巾方向分布
の巾方向平均値に対する巾方向偏差値を演算器によって
演算し、この偏差値を予め定めた値に制御する制御器に
よって、被焼結帯に原料を巾方向に分布して供給する焼
結機の操業方法である．
［作用］
本発明における焼結機の操業方法は、水平方向に移動し
ながら、上面より下面に燃焼帯が移動する被焼結帯を有
し、かつ該被焼結帯の上面から下面に空気を通風する手
段を有する焼結機の操業方法において、被焼結帯下面の
巾方向および進行方向に複数個配する排ガスの温度計に
よって排ガス温度を計測し、該排ガス温度が一定に保持
される帯域（以下初期定温帯域）と最大値を示す点（以
下焼結終了点）との中間にある指定値に排ガス温度を予
め定め、該指示値に対応する被焼結帯の水平方向におけ
る指示値対応位置の、巾方同分布を求め、該巾方向分布
の巾方向平均値に対する巾方向偏差値を演算器によって
演算し、この偏差値を予め定めた値に制御する制御器に
よって、被焼結帯に原料を巾方向に分布して供給するの
で、焼結終了点を超え被焼結帯が放冷状態に入った位置
を誤認することはない．
［実施例］
第１図（ａ）は本発明の一実施例を示す説明図である。[Problems to be Solved by the Invention] However, the prior art has the following problems. In other words, in the conventional technology, the widthwise distribution of exhaust gas temperature is measured at a predetermined position in the machine length direction of the sintering machine, but in the temperature pattern shown in Figure 2, it is possible to misidentify the development status of the combustion zone. There is a sex. FIG. 3 is a graph showing the temperature pattern q at the center in the width direction and the temperature pattern r at the ends in the width direction. Assume that at a position P in the longitudinal direction, the temperature Q at the center is measured and the temperature R at the end is obtained. Point R is on the right side of the highest point on the graph, that is, the sintering end point, but point Q is on the left, so comparing these values is confusing the temperature before and after the end of sintering. become. The purpose of the present invention is to solve the above-mentioned problems and to propose a method of operating a sintering machine that can accurately control the sintering reaction. This method of operating a sintering machine has a sintered zone in which the combustion zone moves from the upper surface to the lower surface while moving in the horizontal direction, and means for ventilating air from the upper surface to the lower surface of the sintered zone. In a method of operating a sintering machine having The exhaust gas temperature is preset to a specified value between the point (constant temperature zone) and the point showing the maximum value (hereinafter referred to as the sintering end point), and the indicated value corresponding position W in the horizontal direction of the zone to be sintered corresponding to the indicated value is determined. , the width direction distribution is determined, the width direction deviation value from the width direction average value of the width direction distribution is calculated by a calculator, and the raw material is applied to the band to be sintered by a controller that controls this deviation value to a predetermined value. This is a method of operating a sintering machine that distributes the feed in the width direction. [Function] The operating method of the sintering machine according to the present invention has a sintered zone in which a combustion zone moves from the upper surface to the lower surface while moving in the horizontal direction, and air is flowed from the upper surface to the lower surface of the sintered zone. In a method of operating a sintering machine having ventilation means, the temperature of the exhaust gas is measured by a plurality of exhaust gas thermometers arranged in the width direction and the traveling direction of the lower surface of the sintered belt, and the temperature of the exhaust gas is maintained constant. The exhaust gas temperature is preset to a specified value between the zone (hereinafter referred to as the initial constant temperature zone) and the point showing the maximum value (hereinafter referred to as the sintering end point), and the specified value in the horizontal direction of the zone to be sintered corresponding to the specified value is set. The same distribution in the width direction at the corresponding position is obtained, the deviation value in the width direction from the average value in the width direction of the distribution in the width direction is calculated by a calculator, and the controller controls this deviation value to a predetermined value. Since the raw material is supplied to the strip in a distributed manner across its width, there is no possibility of misidentifying the position where the sintered strip has entered the cooling state beyond the sintering end point. [Embodiment] FIG. 1(a) is an explanatory diagram showing an embodiment of the present invention.
ホッパ−１により排出された原料２は装入ゲート３、３
１，３２、３３、３４によってその量を制御され、カッ
トオフゲート４によって、被焼結帯５の厚さが定められ
る．被焼結帯はパレットコンベアー（図示せず）によっ
て移送されるので、その厚さが一定の場合は、装入量を
変えるとその密度が変化して移送量が変化する。装入量
はレベルメーター６によって測定される。被焼結帯は点
火装１７によって、その上面において点火され、その水
平方向の進行とともに焼結帯は上面から下面に発達し、
排鉱前に下面に達して焼結が終了する．この間空気は被
焼結帯を通過し、排ガスとなって風箱に導入される。風
箱の総数は２３個である。これらの風箱のうち、１８番
目、２０番目、２２番目の風箱Ｑ，（ｉ＝１８．２０２
２）には、温度計Ｓ＋＋ ｔ（ｉ＝１８．２０２２．ｊ
＝１．２，３，４，５）が配されている。第１図（ｂ）
は第１図（ａ）のＡ−Ａ矢視図である．図に示すように
装入ゲートおよび温度計は巾方向に５個配されている。The raw material 2 discharged from the hopper 1 is fed to charging gates 3 and 3.
1, 32, 33, and 34, and the thickness of the band 5 to be sintered is determined by the cutoff gate 4. Since the band to be sintered is transported by a pallet conveyor (not shown), if its thickness is constant, changing the charging amount will change its density and the amount of transport will change. The amount charged is measured by a level meter 6. The sintered zone is ignited on its upper surface by the ignition device 17, and as it progresses in the horizontal direction, the sintered zone develops from the upper surface to the lower surface.
Sintering ends when the bottom surface is reached before the ore is discharged. During this time, air passes through the zone to be sintered and is introduced into the wind box as exhaust gas. The total number of wind boxes is 23. Among these wind boxes, the 18th, 20th, and 22nd wind boxes Q, (i=18.202
2) has a thermometer S++ t (i=18.2022.j
=1.2,3,4,5) are arranged. Figure 1(b)
is a view taken along arrow A-A in FIG. 1(a). As shown in the figure, five charging gates and thermometers are arranged in the width direction.
第Ｌ図において、温度計の情報は演算器１０に入力され
、この情報に基づいて制御器１１は装入ゲートを調節す
る。In FIG. L, thermometer information is input to a calculator 10, and based on this information a controller 11 adjusts the charging gate.
これら温度計の指示値をＸ＋，ｔ（ｉ ＝ １８ ．
２ ０２２ ｊ＝１．２，３ ４ ５）とし、温
度の機長方向の分布を二次曲線で近似すると、温度制御
における機長方向長さし，は、
ＬＪ ＝Ａ＋ Ｘ１， ２＋ＢＪ ・Ｘｌ， 千
Ｃ，・・（１）
ただし、Ａ ，．Ｂ Ｊ，Ｃ ．は定数である。すなわ
ち、各分割巾に対応する、この定数が温計の位置と温度
指示値によって求められる。したがって、温度の指定値
を定めると温度制御における基準長が各分割巾ごとに求
められる。この基準長を各巾ごとに制御するのが本発明
の要点である。長さの単位としては、風箱の機長方向長
さを用いた．すなわち、風箱１８、２０、２２における
機長方向長さは、は風箱の単位長を１とすると、それぞ
れ、１８１，２０ １、２２ １である．
第１表はこのようにして求めた各分割中に対応する基準
長である。この場合、温度の指定値は２５０℃である．
表において、各分割巾に対応する基準長を（１）式から
求め、その平均値がらの偏差が得られる。制御の方針と
して、この偏差を零にするものであれば、零がら各偏差
を差し引いたものが演算器より制御器に入力され、制御
器は装入ゲートを調節する６
第１表
第２表は、第１表における制御の効果を示すもので、従
来法に較べて本発明法においては、生産能率が向上し、
しかも焼結鉱の回転強度（ＪＩＳＭ８７１２），焼成歩
留まり、において大差が無い．
第２表
第３表は制御の方針として、排ガスからの熱回収を重視
した場合の制御目標値を表のように定めた場合、この値
から温度偏差値を差し引いたものが演算器より制御器に
入力され、制御器は装入ゲートを調節する。The readings of these thermometers are X+, t(i = 18.
2 022 j = 1.2, 3 4 5), and if the temperature distribution in the longitudinal direction is approximated by a quadratic curve, then the length in the longitudinal direction in temperature control is: LJ = A + X1, 2 + BJ ・Xl, 1,000 C ,...(1) However, A ,. BJ,C. is a constant. That is, this constant corresponding to each division width is determined based on the position of the thermometer and the temperature indication value. Therefore, once the specified temperature value is determined, the reference length for temperature control is determined for each division width. The key point of the present invention is to control this reference length for each width. The length of the wind box in the longitudinal direction was used as the unit of length. That is, the lengths in the longitudinal direction of the wind boxes 18, 20, and 22 are 181, 20 1, and 22 1, respectively, assuming that the unit length of the wind box is 1. Table 1 shows the reference lengths corresponding to each division determined in this way. In this case, the specified temperature is 250°C.
In the table, the reference length corresponding to each division width is determined from equation (1), and the deviation from the average value is obtained. If the control policy is to make this deviation zero, then the value obtained by subtracting each deviation from zero is input from the calculator to the controller, and the controller adjusts the charging gate.6 Table 1 Table 2 shows the effect of the control in Table 1. Compared to the conventional method, the method of the present invention improves production efficiency,
Furthermore, there is no significant difference in the rotational strength (JISM8712) and firing yield of the sintered ore. Tables 2 and 3 show that when the control target value is determined as shown in the table when emphasis is placed on heat recovery from exhaust gas as a control policy, the value obtained by subtracting the temperature deviation value from this value is determined by the controller from the arithmetic unit. is input and the controller adjusts the charging gate.
第
３
表
第４表は、第３表における制御の効果を示すもので、従
来法に較べて、本発明法においては、排ガスの熱回収に
よって発生した蒸気の回収量が向上している。Table 3 Table 4 shows the effect of the control shown in Table 3. Compared to the conventional method, the method of the present invention improves the recovery amount of steam generated by heat recovery of exhaust gas.
第４表
以上のように、本発明においては、制御の方針によって
巾方向の基準長の分布を変更することが可能である．
［発明の効果］
以上のように、本発明においては、巾方向の基準長分布
を制御することにより、焼結機の能率が向上し、品質が
確保され、熱回収が効率良く行われる効果がある。As shown in Table 4 and above, in the present invention, it is possible to change the distribution of reference lengths in the width direction depending on the control policy. [Effects of the Invention] As described above, in the present invention, by controlling the reference length distribution in the width direction, the efficiency of the sintering machine is improved, quality is ensured, and heat recovery is performed efficiently. be.
第１図は本発明の一実施例を示す説明図、第２図は排ガ
ス温度の機長方向分布のパターンを示すグラフ図、第３
図は巾方向中央部の温度パターンｑと巾方向端部の温度
パターンｒを示すグラフ図である。FIG. 1 is an explanatory diagram showing an embodiment of the present invention, FIG. 2 is a graph diagram showing the pattern of exhaust gas temperature distribution in the machine length direction, and FIG.
The figure is a graph showing a temperature pattern q at the center in the width direction and a temperature pattern r at the ends in the width direction.
Claims (1)
する被焼結帯を有し、かつ該被焼結帯の上面から下面に
空気を通風する手段を有する焼結機の操業方法において
、被焼結帯下面の巾方向および進行方向に複数個配する
排ガスの温度計によつて排ガス温度を計測し、該排ガス
温度が一定に保持される帯域（以下初期定温帯域）と最
大値を示す点（以下焼結終了点）との中間にある指定値
に排ガス温度を予め定め、該指示値に対応する被焼結帯
の水平方向における指示値対応位置の、巾方向分布を求
め、該巾方向分布の巾方向平均値に対する巾方向偏差値
を演算器によつて演算し、この偏差値を予め定めた値に
制御する制御器によつて、被焼結帯に原料を巾方向に分
布して供給することを特徴とする焼結機の操業方法。In a method of operating a sintering machine, the sintering machine has a sintered zone in which the combustion zone moves from the upper surface to the lower surface while moving in the horizontal direction, and has means for ventilating air from the upper surface to the lower surface of the sintered zone, The exhaust gas temperature is measured with multiple exhaust gas thermometers arranged in the width direction and the traveling direction of the lower surface of the sintered zone, and the zone where the exhaust gas temperature is kept constant (hereinafter referred to as the initial constant temperature zone) and the maximum value are indicated. The exhaust gas temperature is preset to a specified value midway between the point (hereinafter referred to as the sintering end point), and the width direction distribution of the position corresponding to the specified value in the horizontal direction of the zone to be sintered corresponding to the specified value is determined. A calculator calculates a deviation value in the width direction with respect to the average value in the width direction of the directional distribution, and a controller that controls this deviation value to a predetermined value distributes the raw material in the width direction in the band to be sintered. A method of operating a sintering machine characterized by supplying
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1089390A JPH089740B2 (en) | 1990-01-19 | 1990-01-19 | Operating method of sintering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1089390A JPH089740B2 (en) | 1990-01-19 | 1990-01-19 | Operating method of sintering machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03215630A true JPH03215630A (en) | 1991-09-20 |
| JPH089740B2 JPH089740B2 (en) | 1996-01-31 |
Family
ID=11762995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1089390A Expired - Fee Related JPH089740B2 (en) | 1990-01-19 | 1990-01-19 | Operating method of sintering machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH089740B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006206972A (en) * | 2005-01-28 | 2006-08-10 | Jfe Steel Kk | Method for controlling divided gate of sintering machine and method for manufacturing sintered ore |
| JP2008038210A (en) * | 2006-08-08 | 2008-02-21 | Jfe Steel Kk | Method for producing sintered ore |
| JP2012219363A (en) * | 2011-04-13 | 2012-11-12 | Nippon Steel Corp | Method for production of sintered ore |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MXPA03007545A (en) | 2001-02-21 | 2004-10-15 | Tilia Int Inc | Method for preparing air channel-equipped film for use in vacuum package. |
| US7517484B2 (en) | 2003-03-24 | 2009-04-14 | Sunbeam Products, Inc. | Forming evacuation channels during single and multi-layer extrusion process |
-
1990
- 1990-01-19 JP JP1089390A patent/JPH089740B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006206972A (en) * | 2005-01-28 | 2006-08-10 | Jfe Steel Kk | Method for controlling divided gate of sintering machine and method for manufacturing sintered ore |
| JP2008038210A (en) * | 2006-08-08 | 2008-02-21 | Jfe Steel Kk | Method for producing sintered ore |
| JP2012219363A (en) * | 2011-04-13 | 2012-11-12 | Nippon Steel Corp | Method for production of sintered ore |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH089740B2 (en) | 1996-01-31 |
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