JPH08143981A - Operation of sintering - Google Patents
Operation of sinteringInfo
- Publication number
- JPH08143981A JPH08143981A JP31260894A JP31260894A JPH08143981A JP H08143981 A JPH08143981 A JP H08143981A JP 31260894 A JP31260894 A JP 31260894A JP 31260894 A JP31260894 A JP 31260894A JP H08143981 A JPH08143981 A JP H08143981A
- Authority
- JP
- Japan
- Prior art keywords
- sintering
- ore
- raw material
- sintered
- sinter
- 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.)
- Withdrawn
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は高炉に装入して使用され
る焼結鉱の焼結操業方法に関し、さらに詳しくは、歩留
低下の要因となる焼結機排鉱部焼結層中の未焼結層を減
少させて成品歩留を大幅に向上することのできる焼結操
業方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sinter operating method for sinter used in a blast furnace, and more specifically, in a sinter bed of a sinter in a sinter machine that causes a decrease in yield. The present invention relates to a sintering operation method capable of significantly improving the product yield by reducing the unsintered layer.
【０００２】[0002]
【従来の技術】焼結鉱原料は焼結機中での焼結反応によ
り、溶融状態を経て焼結機の末端の排鉱部から排出され
るが、この際、焼結反応が完了していない赤熱帯が焼結
層中に残留しており、この赤熱帯の残留比率が高いまま
に排出された焼結鉱は粒度の細かい粉状物の比率が高く
なって、焼結鉱の成品歩留が低下する。2. Description of the Related Art A raw material for sinter ore is discharged from an exhaust ore section at the end of the sinter by a sintering reaction in the sinter, and then, the sinter reaction is completed. There is no red tropics remaining in the sinter layer, and the sinter discharged with a high residual ratio of this tropics has a high proportion of fine-grained powder, and the sintered ore product The stay is reduced.
【０００３】このため、前記焼結層中の赤熱帯の残留比
率を減少させるために、例えば、特開平４−１９３９１
５号公報には、焼結鉱原料の装入口にパレット幅方向に
分割された昇降可能な通気棒を設け、排鉱部に設けたモ
ニタで焼結機から排出される焼結層の断面を撮影して赤
熱比を計算し、その赤熱比を予め定めてある目標赤熱比
となるように前記通気棒の深度を調整する技術が示され
ている。また、特開平１−１９１７５１号公報には、原
料装入部で幅方向に多分割ゲートを設け、排鉱部におけ
る赤熱層の厚さの偏差が少なくなるように、前記多分割
ゲートを制御する技術が示され、特開昭５９−６６６８
５号公報には、画像計測器により、焼結層面の明部と暗
部との境界位置を検出して演算を行う監視装置の技術が
示され、また、特開昭５８−１２６９３５号公報には、
ＩＴＶ装置で焼結層の照度を検出して、画像分析装置に
より、赤熱部の比率を計算してこれに基づいて通気量調
整装置を作動させて焼結鉱原料の装入口の充填密度を調
整する技術が記載されている。Therefore, in order to reduce the residual ratio of the red tropical zone in the sintered layer, for example, Japanese Patent Application Laid-Open No. 4-19391.
In Japanese Patent No. 5 publication, a vent rod which is divided in the pallet width direction is provided at the inlet of the raw material for sinter, and a cross section of the sinter layer discharged from the sinter machine is monitored by a monitor provided in the slag discharge section. There is disclosed a technique of photographing and calculating a red heat ratio, and adjusting the depth of the ventilation rod so that the red heat ratio becomes a predetermined target red heat ratio. Further, in Japanese Unexamined Patent Publication No. Hei 1-191751, a multi-divided gate is provided in the raw material charging portion in the width direction, and the multi-divided gate is controlled so that the deviation of the thickness of the red-hot layer in the mine discharge portion is reduced. The technique is shown in JP-A-59-6668.
Japanese Unexamined Patent Publication No. 58-126935 discloses a technique of a monitoring device that detects a boundary position between a bright portion and a dark portion of a sintered layer surface by an image measuring device and performs calculation. ,
The illuminance of the sintered layer is detected by the ITV device, the ratio of the red-heated part is calculated by the image analysis device, and the aeration amount adjusting device is operated based on this to adjust the filling density of the inlet of the sinter raw material. The technique to do is described.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述の
技術はいずれも焼結層縦断面における単なる明暗の差で
赤熱帯と暗部とを判別して、その赤熱帯の面積比率等で
焼結完了点を判定しているが、前記赤熱帯には既に焼結
反応の完了した１１００℃〜８００℃間の領域が含まれ
ているために、焼結反応の完了点を正確に把握すること
が困難である。従って、この不正確なデータに基づい
て、機械的な手段によって焼結層の性状を変化させるた
めに、成品歩留のばらつきや低下に結びつく場合が多か
った。また、特開平４−１９３９１５号公報、特開平１
−１９１７５１号公報、特開昭５８−１２６９３５号公
報に示されている、通気棒、多分割ゲートあるいは通気
量調整装置等を機械的に作動させて、赤熱帯の厚さを制
御する方法では、変化させた作動量に対応する赤熱帯の
厚みの変化量が微少すぎて、実際の赤熱帯の厚みの制御
は極めて困難であり、しかもこのように赤熱帯を制御し
たにも関わらず、成品歩留のばらつきは大きくなるとい
う問題点があった。本発明は、このような事情に鑑みて
なされたもので、焼結反応の焼結完了点を正確に把握
し、これに基づいて焼結機中に装入される焼結鉱原料自
体の性状を制御することにより、成品歩留の高い焼結鉱
の焼結操業方法を提供することを目的とする。However, in any of the above-mentioned techniques, the red tropical zone and the dark zone are discriminated by the mere difference in brightness between the longitudinal sections of the sintered layer, and the sintering completion point is determined by the area ratio of the red tropical zone. However, since the red tropical zone includes a region between 1100 ° C. and 800 ° C. at which the sintering reaction has already been completed, it is difficult to accurately grasp the completion point of the sintering reaction. is there. Therefore, based on this inaccurate data, the properties of the sintered layer are changed by mechanical means, which often leads to variation or reduction in product yield. In addition, JP-A-4-193915 and JP-A-1
In the method of controlling the thickness of the red tropical zone by mechanically operating a ventilation rod, a multi-divided gate, a ventilation amount adjusting device or the like, which is disclosed in Japanese Patent Application Laid-Open No. 191751 and Japanese Patent Application Laid-Open No. 58-126935, It is very difficult to control the actual thickness of the red tropics because the amount of change in the thickness of the red tropics corresponding to the changed operation amount is too small. There was a problem that the variation in the stay was large. The present invention has been made in view of such circumstances, and accurately grasps the sintering completion point of the sintering reaction, and based on this, the properties of the sintered ore raw material itself charged into the sintering machine. It is an object of the present invention to provide a sintering operation method for sinter having a high product yield by controlling the temperature.
【０００５】[0005]
【課題を解決するための手段】前記目的に沿う請求項１
記載の焼結操業方法は、ドラムミキサーにより造粒され
た焼結鉱原料を、焼結機のパレット上に装入して焼結層
を形成させて焼結する焼結操業方法において、前記焼結
機の排鉱部から排出される前記焼結層の温度分布を測定
して、温度が１１００℃以下の部分の面積比率を９０％
以上とするように、前記ドラムミキサーへ添加する注水
量、生石灰量、または粉コークス量を制御するように構
成されている。A method according to the above-mentioned object.
The sintering operation method described is a sintering operation method in which a sintered ore raw material granulated by a drum mixer is charged on a pallet of a sintering machine to form a sintered layer and then sintered, The temperature distribution of the sintered layer discharged from the slag discharge part of the binder was measured, and the area ratio of the portion where the temperature was 1100 ° C or lower was 90%.
As described above, the amount of water to be added to the drum mixer, the amount of quick lime, or the amount of coke powder is controlled.
【０００６】ここで、ドラムミキサーは回転するドラム
の中で焼結鉱原料を撹拌混合しながら必要な粒度の造粒
された焼結鉱原料を得るための装置である。温度が１１
００℃以下となる部分の面積は、排鉱部における焼結層
の層断面の温度分布を放射温度計等によって測定し、画
像解析等の方法により算出する。前記温度の測定は焼結
層中の各点での温度値が与えられるものならば、前記放
射温度計の他に、例えば、熱電対等を採用してもよい。
ドラムミキサーに添加する注水量、生石灰量、または粉
コークス量の制御は、予め測定してある前記各量と、排
鉱部焼結層における温度が１１００℃以下の部分の面積
比率との関係によって、各量を調整することにより行
う。また粉コークスとは粒径を５ｍｍ以下に粉砕したコ
ークス原料をいうものとする。Here, the drum mixer is an apparatus for obtaining the granulated sinter ore raw material having a required particle size while stirring and mixing the sinter ore raw material in a rotating drum. Temperature is 11
The area of the portion having a temperature of 00 ° C. or lower is calculated by a method such as image analysis by measuring the temperature distribution of the layer cross section of the sintered layer in the mine ore section by a radiation thermometer or the like. In addition to the radiation thermometer, for example, a thermocouple or the like may be used for the temperature measurement as long as the temperature value at each point in the sintered layer is given.
The amount of water injection, the amount of quick lime, or the amount of coke powder added to the drum mixer is controlled by the relationship between each of the above-measured amounts and the area ratio of the portion where the temperature in the discharged ore sintering layer is 1100 ° C or less. , By adjusting each amount. Further, the powder coke means a coke raw material having a particle size of 5 mm or less.
【０００７】[0007]
【作用】高炉に装入される焼結鉱の原料となる焼結鉱原
料は、鉄鉱石、石灰石、コークス及び生石灰等を含有す
る。焼結鉱は、これらの焼結鉱原料をそれぞれ粒度調整
した後、秤量混合し、ドラムミキサーで造粒処理され、
焼結機中で焼結させて製造される。そして前記焼結鉱
は、高炉内での還元反応を良好に維持するために必要な
強度と粒度を持たせることが重要となる。通常、焼結鉱
の粒度は２ｍｍ以上が必要となるが、焼結反応において
は、焼結が完了しないままで排出される焼結鉱があるた
めに、これが粒径２ｍｍ未満の粉状物となって使用でき
ないために、焼結鉱の成品歩留が低下する要因となって
いる。The sinter ore raw material, which is the raw material of the sinter ore charged into the blast furnace, contains iron ore, limestone, coke, quick lime, and the like. Sintered ore is, after adjusting the particle size of each of these sintered ore raw materials, weighed and mixed, granulated with a drum mixer,
It is manufactured by sintering in a sintering machine. It is important that the sinter has the strength and grain size necessary for maintaining a good reduction reaction in the blast furnace. Usually, the particle size of the sinter is required to be 2 mm or more. However, in the sintering reaction, since some sinter is discharged before the completion of sintering, this is a powdery material having a particle size of less than 2 mm. Since it cannot be used for a long time, it is a factor that the product yield of the sintered ore decreases.
【０００８】本発明者等は、焼結機から排出される直前
における焼結層中の温度を測定することにより、焼結完
了点を正確に把握し、このデータに基づいて装入される
焼結鉱原料の通気特性等の調整を行えば、焼結鉱の成品
歩留の変動を抑えて、生産性を向上できるという知見に
基づいて本発明を完成させるに至ったものである。本発
明者等が実際に焼結機排鉱部における焼結層の温度を測
定してみると、いわゆる輝度の高い赤熱帯の温度は、８
００℃〜１４５０℃もの広範囲な領域に分布しているこ
とが分かった。一方、焼結完了点は焼結層が最高温度に
昇温後、温度降下域に入り焼結層の凝固が完了する温度
であり、その温度は約１１００℃である。従って、単に
輝度の高い赤熱帯によって焼結完了点を判定した場合に
は、前記赤熱帯には既に焼結反応の完了した１１００℃
〜８００℃間の領域が含まれているために、焼結反応の
完了点を正確に把握することができない。従って、請求
項１記載の焼結操業方法においては、放射温度計等によ
り、排鉱部における焼結層の表層から下層に至る断面の
温度を正確に測定して、焼結完了点である１１００℃以
下となる焼結層の面積比率が全焼結層の９０％以上にな
るように、焼結機中に装入される焼結鉱原料の特性を制
御する。ここで、上述の判定において、焼結層縦断面の
９０％以上の面積比率としたのは、９０％未満である
と、図２に示されるように焼結鉱の成品歩留が著しく低
下する他、焼結鉱成品の品質（強度）が低下する等の理
由による。また、本発明においては、焼結完了点である
１１００℃以下の部分の面積を制御するものであるか
ら、前記面積の上限は１００％であり、このような状態
での歩留は８３％以上を安定して達成できる。The inventors of the present invention accurately grasp the sintering completion point by measuring the temperature in the sintered layer immediately before being discharged from the sintering machine, and based on this data, the firing to be performed is carried out. The present invention has been completed based on the finding that if the ventilation characteristics of the sinter ore material are adjusted, fluctuations in the product yield of the sintered ore can be suppressed and productivity can be improved. When the present inventors actually measured the temperature of the sintered layer in the sinter of the sintering machine, the temperature of so-called red tropical zone with high brightness was 8
It was found that they were distributed in a wide range of 00 ° C to 1450 ° C. On the other hand, the sintering completion point is the temperature at which the temperature of the sintered layer rises to the maximum temperature and then the temperature falls into the temperature lowering zone to complete the solidification of the sintered layer, which is about 1100 ° C. Therefore, when the sintering completion point is simply determined by the bright red tropical zone, the red tropical zone has 1100 ° C. at which the sintering reaction has already been completed.
Since the region between ˜800 ° C. is included, the completion point of the sintering reaction cannot be accurately grasped. Therefore, in the sintering operation method according to claim 1, the temperature of the cross section from the surface layer to the lower layer of the sintered layer in the mine ore is accurately measured by a radiation thermometer or the like, and the sintering completion point is 1100. The characteristics of the sintered ore raw material charged in the sintering machine are controlled so that the area ratio of the sintered layer having a temperature of ℃ or less becomes 90% or more of the total sintered layer. Here, in the above determination, when the area ratio of 90% or more of the vertical cross section of the sintered layer is less than 90%, as shown in FIG. 2, the product yield of the sintered ore significantly decreases. In addition, the quality (strength) of the sintered mineral product is reduced. Further, in the present invention, since the area of the portion at 1100 ° C. or lower, which is the sintering completion point, is controlled, the upper limit of the area is 100%, and the yield in such a state is 83% or more. Can be achieved stably.
【０００９】焼結機中における焼結反応は、点火炉で点
火された焼結層中の焼結鉱原料が次第に溶融しながら焼
結反応が進行し、最終的に凝固して完了するが、この焼
結反応は焼結層の上部より送入される空気によりコーク
スが酸化燃焼することにより起こる。そこで、焼結層の
通気特性が不均一であると、この空気の焼結層への吸入
に不均一性が生じて排鉱部における焼結層の温度分布の
差となって現れる。請求項１記載の焼結操業方法におい
ては、焼結鉱原料の通気特性を焼結鉱原料の造粒を行う
ドラムミキサーでの添加注水量、生石灰量、または粉コ
ークス量等の条件を変化させて焼結層の通気特性を調整
して、排鉱部焼結層の温度分布の制御を行う。従って、
焼結反応の正確なデータに基づく制御であるため、この
ように制御された条件における焼結鉱の成品歩留は、変
動が少なく、かつ高水準を維持することができる。[0009] The sintering reaction in the sintering machine is completed while the sintering reaction progresses while the sinter ore raw material in the sintered layer ignited in the ignition furnace gradually melts and finally solidifies. This sintering reaction occurs when the coke is oxidatively burned by the air introduced from above the sintered layer. Therefore, if the ventilation characteristics of the sintered layer are non-uniform, non-uniformity will occur in the intake of this air into the sintered layer, resulting in a difference in the temperature distribution of the sintered layer in the mine ore. In the sintering operation method according to claim 1, the aeration characteristics of the sinter ore raw material are changed by changing the conditions such as the amount of added water injection, the amount of quick lime, or the amount of powder coke in a drum mixer that granulates the sinter ore raw material. The ventilation characteristics of the sintered layer are adjusted to control the temperature distribution of the discharged ore sintered layer. Therefore,
Since the control is based on accurate data of the sintering reaction, the product yield of the sintered ore under such controlled conditions can be maintained at a high level with little fluctuation.
【００１０】[0010]
【実施例】続いて、添付した図面を参照しつつ、本発明
を具体化した実施例につき説明し、本発明の理解に供す
る。ここに、図１は本発明の一実施例に係る焼結操業方
法を適用した装置の概略説明図、図２は排鉱部焼結層の
１１００℃以下の部分の面積比率と焼結鉱成品歩留との
関係を示す図、図３はドラムミキサーに添加する注水量
と排鉱部焼結層の１１００℃以下の部分の面積比率との
関係を示した図、図４は生石灰量と排鉱部焼結層の１１
００℃以下の部分の面積比率との関係を示した図、図５
は粉コークス量と排鉱部焼結層の１１００℃以下の部分
の面積比率との関係を示した図である。Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a schematic explanatory view of an apparatus to which a sintering operation method according to an embodiment of the present invention is applied, and FIG. 2 is an area ratio of a portion of a sintered layer of a discharged ore portion at 1100 ° C. or less and a sintered mineral product. Fig. 3 is a diagram showing the relationship with the yield, Fig. 3 is a diagram showing the relationship between the amount of water added to the drum mixer and the area ratio of the portion of the sintered bed of the discharged ore portion at 1100 ° C or lower, and Fig. 4 is the amount of quick lime and the amount of discharged 11 of ore sintered layer
FIG. 5 is a diagram showing a relationship with the area ratio of a portion of 00 ° C. or lower,
FIG. 3 is a diagram showing a relationship between the amount of powder coke and the area ratio of a portion of a sintered layer of a slag ore deposit at 1100 ° C. or lower.
【００１１】図１に示す焼結鉱の操業方法を適用した装
置の概要を説明すると、該装置は、原料ホッパー１０、
ドラムミキサー１８、装入ホッパー１１、焼結機２０中
の焼結パレット１９及び放射温度計１４とにより、大き
く構成されている。ここで、焼結鉱の原料となる生石
灰、粉コークス、鉄鉱石及びその他の副原料をそれぞれ
貯蔵した原料ホッパー１０が配置されており、これら原
料ホッパー１０の下部に設けられた原料供給口には前記
原料の供給量を制御するための原料切り出し装置２２が
取り付けられている。そして前記原料切り出し装置２２
は、演算器１５からの信号によってベルトコンベア２１
への原料供給量が制御されるように構成されている。An outline of an apparatus to which the method for operating a sintered ore shown in FIG. 1 is applied will be described.
The drum mixer 18, the charging hopper 11, the sintering pallet 19 in the sintering machine 20, and the radiation thermometer 14 are largely configured. Here, a raw material hopper 10 for storing quicklime, powdered coke, iron ore, and other auxiliary raw materials, which are raw materials for sinter, is arranged, and a raw material supply port provided under these raw material hoppers 10 has a raw material supply port. A raw material cutting device 22 for controlling the supply amount of the raw material is attached. And the raw material cutting device 22
Is the belt conveyor 21 according to the signal from the calculator 15.
It is configured to control the amount of raw material supplied to the.
【００１２】ドラムミキサー１８は内径４ｍ、長さ２０
ｍの傾斜させた鋼製円筒からなり、最大６回／分の速度
で該円筒を回転させて、前記の各原料を回転混合させる
と同時にドラムミキサー１８内の上部から吹き出される
水によって、配合調整された原料の造粒を行うようにな
っている。また、ドラムミキサー１８内への注水量は流
量制御弁２３によって制御され、この流量制御弁２３へ
の制御信号は演算器１５より送られるよう構成されてい
る。ドラムミキサー１８内で造粒された原料はベルトコ
ンベア２１ａを介して、装入ホッパー１１内に供給され
た後、装入ホッパー１１の下部に設けた原料切り出し装
置２２ａを介して、パレット１９上に装入される。そし
て焼結機２０において焼結処理が行われる。ここで、焼
結機２０は、焼結点火温度１０００℃、有効機長１２０
ｍ、パレット幅４ｍ、パレット移送速度３．０ｍ／分、
パレット１９上の焼結層１２の厚み５５０ｍｍのＤＬ式
焼結機を使用した。そして焼結された原料が排出される
排鉱部１３を臨む、焼結機２０の端末部分には、放射温
度計１４が取り付けられており、排鉱部１３の焼結層１
２の全断面積の温度分布を測定できるように配置されて
いる。そして、放射温度計１４からの温度データは、焼
結機２０の外部に設けられた演算器１５に取り込まれ、
演算器１５内で画像解析等のデータ処理が行われ、予め
組み込まれてあるプログラムに従って、必要な制御信号
をドラムミキサー１８内への注水量を制御する流量制御
弁２３及び原料切り出し装置２２に送る様に構成されて
いる。The drum mixer 18 has an inner diameter of 4 m and a length of 20.
It is composed of an inclined steel cylinder of m, and is rotated at a maximum speed of 6 times / minute to rotationally mix the above-mentioned raw materials, and at the same time, the water is blown from the upper part in the drum mixer 18 to mix. The adjusted raw material is granulated. The amount of water injected into the drum mixer 18 is controlled by the flow rate control valve 23, and the control signal to the flow rate control valve 23 is sent from the calculator 15. The raw material granulated in the drum mixer 18 is supplied into the charging hopper 11 via the belt conveyor 21a, and then, onto the pallet 19 via the raw material cutting device 22a provided in the lower portion of the charging hopper 11. Charged. Then, the sintering process is performed in the sintering machine 20. Here, the sintering machine 20 has a sintering ignition temperature of 1000 ° C. and an effective machine length of 120.
m, pallet width 4 m, pallet transfer speed 3.0 m / min,
A DL type sintering machine having a 550 mm thick sintered layer 12 on the pallet 19 was used. A radiation thermometer 14 is attached to a terminal portion of the sintering machine 20 that faces the mine ore 13 from which the sintered raw material is discharged, and the sintered layer 1 of the mine ore 13 is discharged.
2 is arranged so that the temperature distribution of the entire cross-sectional area of 2 can be measured. Then, the temperature data from the radiation thermometer 14 is taken into the calculator 15 provided outside the sintering machine 20,
Data processing such as image analysis is performed in the calculator 15, and a necessary control signal is sent to the flow rate control valve 23 and the raw material cutting device 22 that control the amount of water injected into the drum mixer 18 according to a program installed in advance. It is configured like.
【００１３】以上の様に構成された焼結装置において、
各原料ホッパー１０に装入された焼結鉱原料１６をベル
トコンベア２１上に原料切り出し量を調整して、鉄鉱石
量８０Wt％、生石灰量３Wt％、粉コークス量４Wt％、石
灰石量１３Wt％となるようにして、ドラムミキサー１８
内に１３ｔ／分の装入速度で装入した。ここで、ドラム
ミキサー１８の回転速度は６回／分で、スプレーノズル
１７からの注水量は７ｋｇ／ｔとした。そして、ドラム
ミキサー１８によって粒径約２．８ｍｍに造粒した焼結
鉱原料１６を装入ホッパー１１を介してパレット１９上
に装入した。このようにして、排鉱部１３における焼結
層１２の温度分布を放射温度計１４によって測定したと
ころ、温度が１１００℃以下の部分の面積比率は７０％
であった。そして、上記の操業条件における成品歩留は
８０％と低率であり、生産性は３１ｔ／（ｄ・ｍ2 ）、
焼結鉱強度は９０％、粉コークス原単位は４８ｋｇ／ｔ
であった。ここで焼結鉱強度は、所定粒度の焼結鉱を所
定距離から鉄板上に自由落下させたときに、破壊しない
で残る焼結鉱の比率で表示したものである。そこで、実
際に操業を行って予め求めてある図３、図４、図５に示
す１１００℃以下の面積比率と各制御要素との関係によ
って、面積比率が最大となるようにして、ドラムミキサ
ー１８内への注水量を１０〜１４ｋｇ／ｔ、生石灰量を
１．８〜２．３Wt％、粉コークス量を４．３〜４．６Wt
％の範囲で調整して、粒径約２．８〜３．２ｍｍに造粒
した焼結鉱原料を焼結することにより、前記面積比率を
９０％に保持して操業を行った。このようにして得られ
た成品歩留は８４％であり、生産性は３２ｔ／（ｄ・ｍ
2 ）、焼結鉱強度は９２％、粉コークス原単位は４６ｋ
ｇ／ｔとなって、いずれも１１００℃以下の部分の面積
比率が７０％であった操業と較べて優れた結果が得ら
れ、１１００℃以下の部分の面積比率を９０％以上とな
るように調整することによって、成品歩留の変動を抑制
することができた。以上の説明においては、排鉱部にお
ける焼結層の１１００℃以下の面積比率と各制御要素と
の関係によって、手動で制御を行ったが、この制御を演
算器中に予め設定してあるプログラムに従って実行させ
ることも可能である。In the sintering apparatus configured as described above,
Adjusting the raw material cutting amount of the sintered ore raw material 16 charged into each raw material hopper 10 on the belt conveyor 21, the iron ore amount is 80 Wt%, the quick lime amount is 3 Wt%, the coke powder amount is 4 Wt%, and the limestone amount is 13 Wt%. Drum mixer 18
It was charged at a charging rate of 13 t / min. Here, the rotation speed of the drum mixer 18 was 6 times / minute, and the amount of water injected from the spray nozzle 17 was 7 kg / t. Then, the sintered ore raw material 16 granulated by the drum mixer 18 to have a particle size of about 2.8 mm was charged on the pallet 19 via the charging hopper 11. In this way, when the temperature distribution of the sintered layer 12 in the slag discharge section 13 was measured by the radiation thermometer 14, the area ratio of the portion where the temperature was 1100 ° C. or lower was 70%.
Met. The product yield under the above operating conditions was as low as 80%, and the productivity was 31 t / (d · m 2 ).
Sintered ore strength is 90%, powder coke unit is 48kg / t
Met. Here, the sinter ore strength is expressed by the ratio of the sinter ore that remains without being destroyed when the sinter ore having a predetermined grain size is freely dropped onto a steel plate from a predetermined distance. Therefore, the drum mixer 18 is designed so that the area ratio is maximized by the relationship between each control element and the area ratio of 1100 ° C. or less shown in FIGS. The amount of water injected into the interior is 10 to 14 kg / t, the amount of quicklime is 1.8 to 2.3 Wt%, and the amount of coke powder is 4.3 to 4.6 Wt.
The area ratio was maintained at 90%, and the operation was carried out by sintering the sintered ore raw material adjusted to a range of 10% and granulated to a particle size of about 2.8 to 3.2 mm. The product yield thus obtained was 84%, and the productivity was 32 t / (dm).
2 ), sinter strength is 92%, powder coke unit is 46k
g / t, which is superior to the operation where the area ratio of 1100 ° C or less was 70%, and the area ratio of 1100 ° C or less was 90% or more. By adjusting, the fluctuation of the product yield could be suppressed. In the above description, the control was manually performed according to the relationship between the area ratio of the sintered layer in the mine ore section of 1100 ° C. or less and each control element, but this control is a program preset in the arithmetic unit. It is also possible to execute according to.
【００１４】[0014]
【発明の効果】請求項１記載の焼結操業方法において
は、焼結反応の焼結完了点を正確に把握し、これに基づ
いて焼結機中に装入される焼結鉱原料自体の性状を制御
することにより、成品歩留の変動を少なくして成品歩留
の高い焼結鉱の焼結が可能である。In the sintering operation method according to the first aspect of the present invention, the sintering completion point of the sintering reaction is accurately grasped, and based on this, the sintering ore raw material itself charged into the sintering machine is detected. By controlling the properties, it is possible to reduce the fluctuation of the product yield and sinter the sintered ore with a high product yield.
【図１】本発明の一実施例に係る焼結操業方法を適用し
た装置の概略説明図である。FIG. 1 is a schematic explanatory view of an apparatus to which a sintering operation method according to an embodiment of the present invention is applied.
【図２】排鉱部焼結層の１１００℃以下の部分の面積比
率と焼結鉱成品歩留との関係を示す図である。FIG. 2 is a diagram showing a relationship between an area ratio of a portion of a sintered layer of a discharged slag portion at 1100 ° C. or lower and a yield of a sintered mineral product.
【図３】ドラムミキサーに添加する注水量と排鉱部焼結
層の１１００℃以下の部分の面積比率との関係を示した
図である。FIG. 3 is a diagram showing the relationship between the amount of water added to the drum mixer and the area ratio of the portion of the sintered ore sinter layer at 1100 ° C. or lower.
【図４】生石灰量と排鉱部焼結層の１１００℃以下の部
分の面積比率との関係を示した図である。FIG. 4 is a diagram showing the relationship between the amount of quick lime and the area ratio of a portion of the sintered ore sinter layer at 1100 ° C. or lower.
【図５】粉コークス量と排鉱部焼結層の１１００℃以下
の部分の面積比率との関係を示した図である。FIG. 5 is a diagram showing a relationship between the amount of coke dust and the area ratio of a portion of the sintered layer of the slag ore portion at 1100 ° C. or lower.
１０ 原料ホッパー １１ 装入ホッパー １２ 焼結層 １３ 排鉱部 １４ 放射温度計 １５ 演算器 １６ 焼結鉱原料 １７ スプレーノズル １８ ドラムミキサー １９ パレット ２０ 焼結機 ２１ ベルトコンベア ２１ａ ベルトコンベア ２２ 原料切り出し装置 ２２ａ 原料切り出し装置 ２３ 流量制御弁 10 Raw Material Hopper 11 Charging Hopper 12 Sintered Layer 13 Exhaust Ore Part 14 Radiation Thermometer 15 Operator 16 Sintered Raw Material 17 Spray Nozzle 18 Drum Mixer 19 Pallet 20 Sintering Machine 21 Belt Conveyor 21a Belt Conveyor 22 Raw Material Cutting Device 22a Raw material cutting device 23 Flow control valve
Claims (1)
原料を、焼結機のパレット上に装入して焼結層を形成さ
せて焼結する焼結操業方法において、 前記ドラムミキサーへ添加する注水量、生石灰量、また
は粉コークス量を制御して、前記焼結機の排鉱部から排
出される前記焼結層の温度分布を測定し、温度が１１０
０℃以下である部分の面積比率を９０％以上としたこと
を特徴とする焼結操業方法。1. A sintering operation method in which a sinter ore raw material granulated by a drum mixer is charged on a pallet of a sinter machine to form a sinter layer for sintering, which is added to the drum mixer. By controlling the amount of water injection, the amount of quick lime, or the amount of coke powder, the temperature distribution of the sintered layer discharged from the slag of the sintering machine is measured, and the temperature is 110.
A sintering operation method characterized in that an area ratio of a portion at 0 ° C or lower is set to 90% or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31260894A JPH08143981A (en) | 1994-11-21 | 1994-11-21 | Operation of sintering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31260894A JPH08143981A (en) | 1994-11-21 | 1994-11-21 | Operation of sintering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08143981A true JPH08143981A (en) | 1996-06-04 |
Family
ID=18031261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31260894A Withdrawn JPH08143981A (en) | 1994-11-21 | 1994-11-21 | Operation of sintering |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08143981A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009280837A (en) * | 2008-05-19 | 2009-12-03 | Nippon Steel Corp | Method for controlling quality of sintered ore |
| CN102853675A (en) * | 2012-10-09 | 2013-01-02 | 李兴文 | Iron ore powder sintering atomization spray system |
-
1994
- 1994-11-21 JP JP31260894A patent/JPH08143981A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009280837A (en) * | 2008-05-19 | 2009-12-03 | Nippon Steel Corp | Method for controlling quality of sintered ore |
| CN102853675A (en) * | 2012-10-09 | 2013-01-02 | 李兴文 | Iron ore powder sintering atomization spray system |
| CN102853675B (en) * | 2012-10-09 | 2014-12-24 | 李兴文 | Iron ore powder sintering atomization spray device |
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| Date | Code | Title | Description |
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| A300 | Withdrawal of application because of no request for examination |
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