JPH03240926A - Method for estimating distribution of carbon concentration in height direction of sintered layer - Google Patents
Method for estimating distribution of carbon concentration in height direction of sintered layerInfo
- Publication number
- JPH03240926A JPH03240926A JP3570690A JP3570690A JPH03240926A JP H03240926 A JPH03240926 A JP H03240926A JP 3570690 A JP3570690 A JP 3570690A JP 3570690 A JP3570690 A JP 3570690A JP H03240926 A JPH03240926 A JP H03240926A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- sintered layer
- height direction
- machine
- distribution
- 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.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims description 18
- 238000005245 sintering Methods 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、焼結層高さ方向のカーボン濃度分布推定方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for estimating carbon concentration distribution in the height direction of a sintered layer.
［従来の技術］
ＤＬ式燗結機において、燃料であるカーボンの焼結層高
さ方向の濃度分布は、歩留り、生産性、および品質と密
接な関係を持っている。すなわち、焼結層高さ方向にカ
ーボンが均一に分布していると、プロセスの特性から上
層が熱不足、下層が熱過剰となる。このため、上層の歩
留り、強度が低下する。このため、焼結層高さ方向に熱
量が均一となるように、高さ方向にカーボン濃度を違え
る（カーボン濃度を偏析させる）装入方法が、種々提案
されている（例えば、特開昭５８２１７６４２号公報）
。[Prior Art] In a DL type sintering machine, the concentration distribution of carbon, which is a fuel, in the height direction of the sintered layer has a close relationship with yield, productivity, and quality. That is, if carbon is uniformly distributed in the height direction of the sintered layer, the upper layer will be underheated and the lower layer will be overheated due to the characteristics of the process. Therefore, the yield and strength of the upper layer decrease. For this reason, various charging methods have been proposed in which the carbon concentration is varied in the height direction (segregating the carbon concentration) so that the amount of heat is uniform in the height direction of the sintered layer (for example, Japanese Patent Laid-Open No. 58217642 Publication No.)
.
しかし、焼結層高さ方向のカーボン濃度を定量的に把握
するためには、焼結機を停止し、点火前の焼結原料層を
高さ方向に分割、サンプリングし、サンプリング原料を
化学分析することによって求めなければならなかった。However, in order to quantitatively understand the carbon concentration in the height direction of the sintered layer, it is necessary to stop the sintering machine, divide the sintered raw material layer in the height direction before ignition, sample it, and chemically analyze the sampled raw material. I had to ask by doing.
［発明が解決しようとする課題］
しかしながら、焼結層高さ方向のカーボン濃度分布を求
める方法は、焼結機を止めて、サンプリングし、化学分
析結果を待たなければならないため、カーボン濃度分布
を知るまで長時閏を要した、また、その測定頻度はバッ
チ的であるため、焼結原料の装入制御には使用できない
という問題点があった。[Problem to be solved by the invention] However, the method of determining the carbon concentration distribution in the height direction of the sintered layer requires stopping the sintering machine, sampling, and waiting for the chemical analysis results. There were problems in that it took a long time to find out, and since the measurement frequency was batch-like, it could not be used to control the charging of sintering raw materials.
［課題を解決するための手段］
この発明は、上記の問題点を解決しようとするもので、
焼結機の各ウィンドボックスのＣＯおよびＣＯ□ガス濃
度と機長方向の排ガス流量分布を測定するとともに、各
ウィンドボックスの排ガス温度等から赤熱層の位置およ
び厚みを演算し、これらの結果から焼結層高さ方向のカ
ーボン濃度分布を求めることを特徴とする焼結層高さ方
向のカーボン濃度分布推定方法である。[Means for Solving the Problems] This invention aims to solve the above problems.
In addition to measuring the CO and CO□ gas concentration and exhaust gas flow rate distribution in the longitudinal direction of each wind box of the sintering machine, the position and thickness of the red-hot layer are calculated from the exhaust gas temperature of each wind box, and sintering is performed based on these results. This is a method for estimating carbon concentration distribution in the height direction of a sintered layer, which is characterized by determining the carbon concentration distribution in the layer height direction.
［作用コ
各ウィンドボックスに取り付けたＣＯ、ＣＯ２ガス濃度
測定器、ガス流量計、およびガス温度計の測定信号等を
演算機に入力し、所定の演算をさせることにより、焼結
層の高さ方向のカーボン濃度分布を短時間に、且つ正確
に検出することが出来る。[Operation: The height of the sintered layer can be determined by inputting the measurement signals of the CO and CO2 gas concentration measuring devices, gas flow meters, and gas thermometers attached to each wind box to a computer and performing the specified calculations. The directional carbon concentration distribution can be detected quickly and accurately.
［実施例］
本発明の実施例を以下に詳細に説明する。第２図は焼結
装置を示す図である。１はＤＬ式焼結機、２は焼結原料
を中継するサージホッパー、３はサージホッパー２から
焼結原料を切り出すロルフィーダー、４はロールフィー
ダー３で切り出した焼結原料を焼結機１に装入する装入
シュド、５は点火炉である。焼結原料は、サージホッパ
ー２からロールフィーダー３、装入シュート４を経て焼
結機１に無端状に配設されたパレット（図示せず）に装
入され、移動するパレットとともに排鉱部１０に向かっ
て移動する。＃ｌ結原料層（または焼結層）６は点火炉
５でその上面に点火される。一方、大気が焼結層６（＃
Ｉ結原料層の中にはコークス粉が混入されている）を通
り ウィンドボックス７、支管８および主ダクト９を経
て主ブロワ−に吸引されている０点火された焼結層が排
鉱部１０に向かって移動する閏、コークス粉の燃焼によ
って焼結層内に形成された８００〜１．３００℃の温度
にて燃焼、溶融中の赤熱層１１は、焼結層６を通して大
気が下向きに吸引されているので、パレットの移動とと
もに下降し、排鉱部１０手前の位置で赤熱層１１の下面
が、焼結層６の下面に達して、これにより焼結層６全高
の焼結が完了し、焼結層は排鉱部１０で排鉱される。[Example] Examples of the present invention will be described in detail below. FIG. 2 is a diagram showing the sintering apparatus. 1 is a DL type sintering machine, 2 is a surge hopper that relays the sintering raw material, 3 is a roll feeder that cuts out the sintering raw material from the surge hopper 2, and 4 is a roll feeder that feeds the sintering raw material cut out by the roll feeder 3 to the sintering machine 1. A charging station 5 is an ignition furnace. The sintering raw material is charged from the surge hopper 2 to the pallet (not shown) disposed in an endless manner in the sintering machine 1 via the roll feeder 3 and the charging chute 4, and is transferred to the ore discharge section 10 along with the moving pallet. move towards. The #l sintering material layer (or sintered layer) 6 is ignited on its upper surface in an ignition furnace 5 . On the other hand, the atmosphere is sintered layer 6 (#
The ignited sintered layer is sucked into the main blower via the wind box 7, the branch pipe 8 and the main duct 9. The red-hot layer 11, which is burning and melting at a temperature of 800 to 1,300°C, formed within the sintered layer by the combustion of the coke powder, causes the atmosphere to be sucked downward through the sintered layer 6. As the pallet moves, it descends, and the lower surface of the red-hot layer 11 reaches the lower surface of the sintered layer 6 at a position before the ore discharge section 10, thereby completing the sintering of the entire height of the sintered layer 6. , the sintered layer is discharged in the ore discharge section 10.
赤熱層１１は点火炉５直下の焼結層６の上面から、それ
より下流の焼結層６の下面に向かって、末広がりに広が
っている。The red-hot layer 11 extends from the upper surface of the sintered layer 6 immediately below the ignition furnace 5 toward the lower surface of the sintered layer 6 downstream thereof.
本発明の方法を実施するために、次のような測定機器が
所定の場所に設けられている。すなわち■ＣＯ、Ｃ０２
濃度測定器；各ウィンドボックス７または各ウィンドボ
ックス７と主ダクト９を連絡する支管８、
■ガス流量計；各つィンドボックス７と主ダクト９を連
絡する支管８、
■ガス温度計；各つィンドボックス７と主ダクト９を連
絡する支管８、この他に必要に応じて、■モニターカメ
ラ；排鉱部１０、
■超音波風速計：＃Ｉ結層６の上方６
次に本発明の方法実施例を第１図で説明する。In order to implement the method of the invention, the following measuring equipment is provided at a predetermined location. That is, ■CO, C02
Concentration measuring device; branch pipe 8 connecting each wind box 7 or each wind box 7 and main duct 9; ■Gas flow meter; branch pipe 8 connecting each wind box 7 and main duct 9; ■Gas thermometer; each A branch pipe 8 connecting the wind box 7 and the main duct 9. In addition, if necessary, ■Monitor camera; ore discharge section 10; ■Ultrasonic anemometer: #I above the condensation layer 6 6 Next, the present invention An embodiment of the method is illustrated in FIG.
各流量計の測定信号が演算機２０の機長方向のガス流量
分布演算部２２に送られ、一方各ガス温度計等の機長方
向の赤熱層の位置および厚さを求めるのに必要な測定信
号が機長方向の赤熱層の位置および厚み演算部２１に送
られる。各Ｃ０１ＣＯ２濃度測定器の測定信号および演
算部２２の演算結果（信号）が演算部２３に送られる。The measurement signals of each flowmeter are sent to the longitudinal gas flow rate distribution calculating section 22 of the computer 20, while the measurement signals necessary for determining the position and thickness of the red-hot layer in the longitudinal direction of each gas thermometer, etc. The information is sent to the position and thickness calculation unit 21 of the red-hot layer in the longitudinal direction. The measurement signals of each CO1CO2 concentration measuring device and the calculation results (signals) of the calculation section 22 are sent to the calculation section 23.
ここで、下記（１１式により、機長方向各位置のカーボ
ン濃度分布Ｑｃ（ｘ）が演算される。Here, the carbon concentration distribution Qc(x) at each position in the machine length direction is calculated using the following equation (11).
Ｑｃ（ｘＸｋｇ／ｒｄ＞ ＝ （１２／２ 、
２４０ ） ｘ［（■ガス濃度（％）＋−ガス濃度
（％））×ガス流量（ｄｒｙ Ｎ ｎ（／ｈ））÷［パ
レットスピード〈■／ｈ）’４結層の幅（ｍ＞ｘ焼結層
の高さ（■）１−（燃焼に寄与しない石灰、生石灰、鉄
鉱石中のカー１度（ｋｇ／ｎｆ））・・・ （１）
演算部２３の演算結果（信号）は演算部２１の演算結果
とともに演算部２４に送られ、下記■式により、焼結層
高さ方向のカーボン濃度Ｐｃ（ｙ）が演算される。Qc(xXkg/rd> = (12/2,
240 ) Height of sintered layer (■) 1 - (Carr 1 degree (kg/nf) in lime, quicklime, iron ore that does not contribute to combustion)... (1) The calculation result (signal) of the calculation unit 23 is calculated It is sent to the calculation section 24 together with the calculation result of the section 21, and the carbon concentration Pc(y) in the height direction of the sintered layer is calculated using the following equation (2).
Ｐ ｃ（ｙ ）（ｋｇ／ｒｄ ） ＝ Ｑｃ（ｘ ）
Ｘ焼結層の高さ（■）／赤熱層の厚さ（諷）・・・ ■
演算された結果は、ＣＲＴデスプレー２５に表示される
。P c (y) (kg/rd) = Qc (x)
X Height of sintered layer (■)/Thickness of red-hot layer (division)... ■ The calculated result is displayed on the CRT display 25.
なお、機長方向のガス流量分布は、以下に示す方法の一
つを使用してを使用して求める。Note that the gas flow rate distribution in the longitudinal direction is determined using one of the methods shown below.
（１）各ウィンドボックスに設けたピトー管により求め
る方法。(1) Method of determining using a pitot tube installed in each wind box.
（２１＃Ｉ結層上の超音波風速計等を使用して、風速を
測定して行う方法。(Method of measuring wind speed using an ultrasonic anemometer, etc. on the 21#I layer.
（３）特公昭５９−２０７３６号公報のように、機長方
向の赤熱層の位置および厚み、主ダクトの排ガス流量と
焼結層各帯（焼結帯、赤熱帯等）の通気抵抗から計算で
求める方法。(3) As in Japanese Patent Publication No. 59-20736, it can be calculated from the position and thickness of the red-hot layer in the longitudinal direction, the exhaust gas flow rate of the main duct, and the ventilation resistance of each zone of the sintered layer (sintered zone, red zone, etc.). How to ask.
また、機長方向の赤熱層の位置および厚みは、以下に示
す方法の一つを使用してを使用して求める。The position and thickness of the glowing layer in the longitudinal direction are also determined using one of the methods shown below.
（１）特開昭５９−６６６８５号公報および特開昭６１
−２６７３２号公報のように、各ウィンドボックスの排
ガス温度と排鉱部の残火層厚等から計算で求める方法。(1) JP-A-59-66685 and JP-A-61
A method of calculating from the exhaust gas temperature of each wind box and the thickness of the ember layer in the ore discharge area, as in Publication No. 26732.
■特公昭５９−２０７３６号公報のように、各ウィンド
ボックスの排ガス温度と機長方向の排ガス流量分布等か
ら計算で求める方法。■A method of calculating from the exhaust gas temperature of each wind box and the exhaust gas flow rate distribution in the longitudinal direction, as in Japanese Patent Publication No. 59-20736.
第３図は本発明方法を使用して焼結層の高さ方向のカー
ボン濃度分布を求めた結果をグラフに表したもので、装
入シュートの角度を５０度および５５度にしたときのも
のを示している。この結果は、装入角度を変化させるこ
とにより、焼結層の上層、下層のカーボン濃度が変化す
る従来の知見を裏ずけている。Figure 3 is a graph showing the results of determining the carbon concentration distribution in the height direction of the sintered layer using the method of the present invention, when the charging chute angle was set to 50 degrees and 55 degrees. It shows. This result confirms the conventional knowledge that the carbon concentration in the upper and lower layers of the sintered layer changes by changing the charging angle.
［発明の効果］
本発明は以上のように構成されているから、焼結層の高
さ方向のカーボン濃度分布を焼結機の運転中に、連続的
に推定することができ、リアルタイムで装入制御を行う
ことができるという効果がある。[Effects of the Invention] Since the present invention is configured as described above, it is possible to continuously estimate the carbon concentration distribution in the height direction of the sintered layer while the sintering machine is operating, and to perform installation in real time. This has the effect that input control can be performed.
第１図は本発明方法の焼結層高さ方向のカーボン濃度計
算ブロック図、第２図は焼結装置を示す図、第３図は本
発明方法を使用して焼結層の高さ方向のカーボン濃度分
布を求めた結果を示したグラフ図である。
２１・・・機長方向の赤熱層の位置および厚み演算部、
２２・・・機長方向排ガス流量分布演算部、２３・・・
機長方向のカーボン濃度分布演算部、２４・・・焼結層
高さ方向のカーボン濃度分布演算部、２５・・・ＣＲＴ
デスブレ
第２図Fig. 1 is a block diagram of carbon concentration calculation in the height direction of the sintered layer using the method of the present invention, Fig. 2 is a diagram showing the sintering equipment, and Fig. 3 is a carbon concentration calculation block diagram in the height direction of the sintered layer using the method of the present invention. FIG. 2 is a graph diagram showing the results of determining the carbon concentration distribution of the carbon concentration distribution. 21... Red-hot layer position and thickness calculation unit in the longitudinal direction;
22... Length direction exhaust gas flow rate distribution calculation section, 23...
Carbon concentration distribution calculation section in machine length direction, 24... Carbon concentration distribution calculation section in sintered layer height direction, 25... CRT
Desbrais Figure 2
Claims (1)
ス濃度と、機長方向の排ガス流量分布を測定するととも
に、各ウインドボックスの排ガス温度等から赤熱層の位
置および厚みを演算し、これらの結果から焼結層高さ方
向のカーボン濃度分布を求めることを特徴とする焼結層
高さ方向のカーボン濃度分布推定方法。In addition to measuring the CO and CO_2 gas concentrations in each wind box of the sintering machine and the exhaust gas flow rate distribution in the machine length direction, the position and thickness of the red-hot layer are calculated from the exhaust gas temperature of each wind box, and from these results, the sintering A method for estimating carbon concentration distribution in the height direction of a sintered layer, characterized by determining a carbon concentration distribution in the height direction of the layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3570690A JPH03240926A (en) | 1990-02-16 | 1990-02-16 | Method for estimating distribution of carbon concentration in height direction of sintered layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3570690A JPH03240926A (en) | 1990-02-16 | 1990-02-16 | Method for estimating distribution of carbon concentration in height direction of sintered layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03240926A true JPH03240926A (en) | 1991-10-28 |
Family
ID=12449311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3570690A Pending JPH03240926A (en) | 1990-02-16 | 1990-02-16 | Method for estimating distribution of carbon concentration in height direction of sintered layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03240926A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020012185A (en) * | 2018-07-20 | 2020-01-23 | 日本製鉄株式会社 | Height direction raw material distribution estimation device, height direction raw material distribution estimation program, and method therefor |
-
1990
- 1990-02-16 JP JP3570690A patent/JPH03240926A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020012185A (en) * | 2018-07-20 | 2020-01-23 | 日本製鉄株式会社 | Height direction raw material distribution estimation device, height direction raw material distribution estimation program, and method therefor |
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