JPH0665620A - Method for charging raw material in bell-less blast furnace - Google Patents

Method for charging raw material in bell-less blast furnace

Info

Publication number
JPH0665620A
JPH0665620A JP21928692A JP21928692A JPH0665620A JP H0665620 A JPH0665620 A JP H0665620A JP 21928692 A JP21928692 A JP 21928692A JP 21928692 A JP21928692 A JP 21928692A JP H0665620 A JPH0665620 A JP H0665620A
Authority
JP
Japan
Prior art keywords
bunker
furnace
charging
raw material
particle size
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
Application number
JP21928692A
Other languages
Japanese (ja)
Inventor
Ichiro Watanabe
一郎 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP21928692A priority Critical patent/JPH0665620A/en
Publication of JPH0665620A publication Critical patent/JPH0665620A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To stabilize the distribution of gas flow in a furnace by perfectly preventing segregation in an upper and a lower bunkers, making the variation of discharged grain diameters into the furnace from the lower bunker with time the flat pattern, reducing influence of the variations of the grain size and the charging rate as less as possible and improving the adjusting precision of the charging schedule. CONSTITUTION:Double-tube segregation preventing parts 3 separated between an inner cylinder 1 and an outer cylinder 2 are arranged in the upper and the lower bunkers 4, 5, and raw material supplied from a charging belt conveyor on the furnace is not reclassified (dispersion of the grain diameters) in the bunker, but is charged in the condition of no segregation of the grain size from the upper bunker 4 to the lower bunker 5. Then the variation of the discharged grain diameters with time at the time of discharging into the furnace is made to be 'the flat pattern-no change of the grain diameter' and the adjusting precision of the charging schedule (a small variation of the grain size and the charging rate) is improved and the distribution of gas flow is stabilized.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、炉頂の原料バンカー
(ホッパー)が上下に二段配置されている、所謂、セン
ターフィード型のベルレス装入装置を有する高炉におい
て、炉内へ装入される原料の粒径経時変化を制御する原
料装入方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast furnace having a so-called center-feed type bellless charging device in which raw material bunkers (hoppers) at the top of the furnace are arranged in two stages, that is, the bunker is charged into the furnace. The present invention relates to a raw material charging method for controlling the temporal change of the grain size of the raw material.

【0002】[0002]

【従来の技術およびこの発明が解決しようとする課題】
センターフィード型ベルレス装入装置は、設備費が安
く、装入物を円周方向にほぼ均一に分配できるという機
能上の利点があるが、一方で、その構造に起因する問題
点を有している。
Prior Art and Problems to be Solved by the Invention
The center-feed type bellless charging device has the functional advantage that the facility cost is low and the charged material can be distributed almost uniformly in the circumferential direction, but on the other hand, it has problems caused by its structure. There is.

【0003】このことを、図7における、従来の単ポー
ト式センターフィード型ベルレス炉頂装入装置の上段お
よび下段バンカー(ホッパー)の原料排出挙動を示す模
式図に基づいて説明する。
This will be described with reference to the schematic diagram in FIG. 7 showing the discharge behavior of the raw materials of the upper and lower bunker (hopper) of the conventional single-port type center feed type bellless furnace top charging device.

【0004】まず、装入BC(ベルトコンベア)から供
給される原料(ここでは主に焼結鉱を表す)は、上バン
カー内で、粗粒が壁側に、また、細粒が中央に歩留
るという偏析を起こす。これは、ヤード等でも見られる
普通の現象であり、装入BCから供給される時間が長い
ために、原料が上バンカー内において再分級する時間を
十分与えられることから起こるものである。
First, the raw materials (mainly sinter ore here) supplied from the charging BC (belt conveyor) walk in the upper bunker with coarse particles on the wall side and fine particles on the center. It causes the segregation of staying. This is a normal phenomenon that can be seen in yards and the like, and it occurs because the material is supplied from the charging BC for a long time, so that the material can be sufficiently reclassified in the upper bunker.

【0005】なお、BC上での原料は分級しておらず、
上バンカー内において反発しながら〜の様に堆積す
る。また、細粒は、の中心部に堆積することとなる。
The raw materials on BC are not classified,
While repulsing in the upper bunker, it accumulates as in. Further, the fine particles will be deposited in the central part of.

【0006】次に、この上バンカーから下バンカーへ装
入するわけであるが、この時は、装入スケジュールの制
約により、20sec 程度の短時間での装入となる。そのた
め、ファンネルフロー(単調増加パターン)で、図7に
おけるの細粒からの中粒,の粗粒の順に排出され
る原料は、下バンカー内で再分級する余裕を与えること
なく、細,中,粗の順で層状に堆積するという現象が起
きる。
Next, the upper bunker is charged into the lower bunker, but at this time, due to the limitation of the charging schedule, the charging is performed in a short time of about 20 seconds. Therefore, in the funnel flow (monotonically increasing pattern), the raw materials discharged in the order of the fine particles to the medium particles to the coarse particles in FIG. 7 are fine, medium, and fine without giving a margin to be reclassified in the lower bunker. A phenomenon occurs in which layers are deposited in a rough order.

【0007】なお、上バンカーからの排出順は、ファン
ネルフローにより,,であるが、より詳細な,
,の順は、はファンネルフローによって内から外
に排出され、,も同様であり、下バンカーでは、最
下層に細粒、その上に中粒、その上に粗粒となり、円周
方向では、中心に行くほど、粗粒となる。また、図7の
,,は、上下バンカー内での中心層()と、そ
の外側の層()と、壁側の層()とを表すもので、
粒径を表すものではない。
The discharge order from the upper bunker is, due to the funnel flow, more detailed,
The order of , is discharged from the inside by the funnel flow to the outside, and , is also the same. In the lower bunker, fine grains are formed in the lowermost layer, medium grains are formed on the lower layer, and coarse grains are formed on the lower layer. The coarser the particles, the closer to the center. Further, in FIG. 7, symbols () and () represent the central layer () in the upper and lower bunker, the outer layer (), and the wall-side layer (),
It does not represent particle size.

【0008】そして、下バンカーから実際に炉内へ装入
される時は、再びファンネルフローで、下バンカーにお
けるから,の順で炉内に装入されていくために、
図8に示すような、排出粒径の経時変化となる。この粗
粒が初期に、細粒が後期に排出されるということは、シ
ャープな中心流や、適度な炉壁流を指向する高炉操業に
おいて、中心にガスが流れにくくなり、炉壁に過度にガ
スが流れて、高炉の安定操業に大きな支障となる。
[0008] When the lower bunker is actually charged into the furnace, the funnel flow is performed again so that the lower bunker is charged into the furnace in that order.
As shown in FIG. 8, the discharge particle size changes with time. The fact that the coarse particles are discharged in the early stage and the fine particles are discharged in the latter period means that in a blast furnace operation in which a sharp central flow or an appropriate furnace wall flow is directed, it becomes difficult for the gas to flow to the center, and the excessive amount of gas flows to the furnace wall. Gas flows, which greatly hinders stable operation of the blast furnace.

【0009】なお、図8において>>となる理由
は、中心層の細,中,粗粒の平均粒度が大で、その外側
層の細,中,粗粒の平均粒度が中で、壁側の層の細,
中,粗粒の平均粒度が小であるからである。また、図8
における無次元粒度は各時間での粒度を平均粒度で割っ
たもので、無次元時間は装入時間を1とした時の各時間
を無次元化したものである(全装入時間)。
The reason why ">>" in FIG. 8 is that the average grain size of the fine, medium and coarse grains in the central layer is large, and the average grain size of the fine, medium and coarse grains in the outer layer is medium and the wall side Thin layers,
This is because the average particle size of medium and coarse particles is small. Also, FIG.
The dimensionless grain size in is the grain size at each time divided by the average grain size, and the dimensionless time is the dimensionless time at each charging time of 1 (total charging time).

【0010】これらのことから、排出粒径の経時変化
を、初期に粗粒が出ず、また、後期にも細粒が出ないよ
うにする、下バンカーの改造については、幾つか創案さ
れている。例えば、特開昭61−157604号公報や特開昭60
−434114号公報等があるが、これらは、全て下バンカー
内に限定したものであり、上バンカー内の改造について
は、ふれられていない。
From the above, some modifications have been proposed for the modification of the lower bunker so that the coarse particles do not appear in the initial stage and the fine particles do not appear in the latter period as well. There is. For example, JP 61-157604 A and JP 60
-434114 gazette, etc., but these are all limited to the inside of the lower bunker, and modification of the inside of the upper bunker is not mentioned.

【0011】なお、上下バンカー改造は特開昭60−2512
08号公報にみられるが、この発明は主眼が原料を粒度別
に装入しようというものである。また、一重管を操業中
にスライドさせるというもので、高温,高圧でダストの
多い所において、そのようなスライドをさせるというこ
とは、故障のもとであり、安定して原料を装入していく
という点からいうと、現実味にとぼしいものである。
Incidentally, the modification of the upper and lower bunkers is disclosed in JP-A-60-2512.
As seen in Japanese Patent Publication No. 08, the main purpose of this invention is to charge raw materials according to particle size. In addition, the single tube is slid during operation. Sliding at a high temperature, high pressure and a lot of dust is a cause of failure, and the raw materials must be stably charged. From the perspective of going, it is a real thing.

【0012】この発明は前述した事情に鑑みて創案され
たもので、その目的は上バンカーおよび下バンカー内で
の偏析を完全に防止することができるようにして、下バ
ンカーから炉内への排出時における粒径の経時変化を、
粒径変化がないフラットパターンにすると共に、粒度お
よび装入量の変化の影響を極力少なくする装入スケジュ
ールの調整精度をアップすることで、炉内におけるガス
流分布を安定させることのできるベルレス高炉における
原料装入方法を提供することにある。
The present invention was made in view of the above-mentioned circumstances, and its purpose is to make it possible to completely prevent segregation in the upper bunker and the lower bunker, and to discharge it from the lower bunker into the furnace. Change in particle size over time
A bellless blast furnace that can stabilize the gas flow distribution in the furnace by making the flat pattern with no change in particle size and improving the adjustment accuracy of the charging schedule that minimizes the influence of changes in particle size and charging amount. To provide a raw material charging method in.

【0013】[0013]

【課題を解決するための手段】そもそも、下バンカー内
で偏析を起こすのは、上バンカー内で再分級し、大きく
偏析することが大きな原因であり、この偏析を防止すれ
ば、下バンカー内では再分級できないため、偏析を抑制
することができる。
[Means for Solving the Problems] In the first place, segregation in the lower bunker is mainly caused by reclassification in the upper bunker and significant segregation. If this segregation is prevented, in the lower bunker. Since reclassification cannot be performed, segregation can be suppressed.

【0014】そこで、この発明の原料装入方法によれ
ば、上バンカーでの偏析を防止することで、下バンカー
内での偏析も完全に防止するために、即ち、炉上装入ベ
ルトコンベアからバンカーへ供給される原料を、バンカ
ー内で再分級(粒径分散)させずに上バンカーから下バ
ンカーへと粒度偏析のないまま装入することができるよ
うにするために、二重管の偏析防止部を上下バンカーの
内部に設置して、偏析を防ごうというものである。
Therefore, according to the raw material charging method of the present invention, in order to completely prevent the segregation in the lower bunker by preventing the segregation in the upper bunker, that is, from the furnace upper charging belt conveyor. Segregation of double pipes so that the raw material supplied to the bunker can be charged from the upper bunker to the lower bunker without particle size segregation without reclassification (particle size dispersion) in the bunker The prevention part is installed inside the upper and lower bunker to prevent segregation.

【0015】[0015]

【実施例】以下、この発明のベルレス高炉における原料
装入方法を図示する実施例によって説明する。
The method for charging raw materials in a bellless blast furnace according to the present invention will be described below with reference to the illustrated embodiments.

【0016】先ず、この発明の原料装入方法を実施する
ため、炉頂において、上下に二段配置されている原料バ
ンカー(ホッパー)の内部へ、図1および図2に示すよ
うに、内筒1と外筒2とがその間隔を離間して設けられ
てなる二重管の偏析防止部3を設置する。
First, in order to carry out the raw material charging method of the present invention, at the top of the furnace, inside the raw material bunker (hopper) arranged in two stages, as shown in FIG. 1 and FIG. A double pipe segregation prevention portion 3 in which the outer cylinder 1 and the outer cylinder 2 are provided with a space therebetween is installed.

【0017】ここでの偏析防止部3は、上下バンカー4,
5内にそれぞれ、同心径,高さの二重管を設置してなっ
ている。この二重管の径は、バンカー4, 5内において、
内,中,外と体積比が1/3 (内,中,外の体積比は1:
1:1、高さ方向,円周方向で配分)になるようにすれ
ば良い。
The segregation prevention section 3 here is composed of upper and lower bunker 4,
Inside each of the five, double pipes with concentric diameter and height are installed. The diameter of this double pipe is in the bunker 4 and 5,
The volume ratio of inside, inside and outside is 1/3 (volume ratio of inside, inside and outside is 1:
(1: 1, distribution in the height direction and the circumferential direction).

【0018】また、この偏析防止部3である二重管の高
さについて、上端は、原料をMAX装入した時の頂点が
弁等に干渉しなければ良く、下端は、バンカー4, 5の斜
面4a,5aとの間に、コークス最大径である約 100mmの6
〜7倍となる距離の間隙を取れるような高さであればに
良い。
Regarding the height of the double pipe which is the segregation prevention portion 3, it is sufficient that the upper end does not interfere with the valve or the like when the raw material is charged into the MAX, and the lower ends have the bunker 4,5. Between the slopes 4a and 5a, a maximum coke diameter of about 100 mm
It is sufficient if the height is such that a gap having a distance of ~ 7 times can be provided.

【0019】即ち、バンカー斜面4a,5aと二重管の下端
との間隙は、図1におけるL1 およびL2 共に、コーク
ス最大径である約 100mmの6〜7倍を有していれば良
い。なお、このような二重管の下端と、斜面4a,5aとの
間の距離を確保すれば、棚吊りを起こすことなく、原料
を通過させることができる。
That is, the gap between the slopes 4a, 5a of the bunker and the lower end of the double pipe should be 6 to 7 times the maximum coke diameter of about 100 mm for both L 1 and L 2 in FIG. . If the distance between the lower end of such a double pipe and the slopes 4a, 5a is secured, the raw material can be passed through without hanging the shelf.

【0020】さらに、この二重管の材料は、普通鋼板
(80mm以上あれば良い) で良い。ただし、表面には、L
型のライナーをつけ、摩耗防止につとめた方が良い。
Further, the material of this double tube may be ordinary steel plate (80 mm or more is sufficient). However, on the surface, L
It is better to attach a mold liner to prevent abrasion.

【0021】このような構成からなるセンターフィード
型のベルレス装入装置を有する高炉において、炉内へ装
入される原料の粒径経時変化を制御する原料装入方法
は、前述した偏析防止部3によって、炉上装入ベルトコ
ンベアからバンカーへ供給される原料を、バンカー内で
再分級(粒径分散)させずに上バンカー4から下バンカ
ー5へと粒度偏析のないまま装入する。
In the blast furnace having the center-feed type bellless charging device having such a structure, the raw material charging method for controlling the temporal change of the particle diameter of the raw material charged into the furnace is the segregation prevention unit 3 described above. Thus, the raw material supplied from the furnace charging belt conveyor to the bunker is charged from the upper bunker 4 to the lower bunker 5 without particle size segregation without reclassification (particle size dispersion) in the bunker.

【0022】そして、下バンカー5から炉内へ排出する
際の排出粒径経時変化をフラットパターン(粒径変化な
し)にして、装入スケジュールの調整精度(粒度および
装入量の変化の影響を極力少なくする)をアップし、炉
内におけるガス流分布を安定させることができるように
する。
Then, the change over time in the discharge particle size when discharged from the lower bunker 5 into the furnace is made into a flat pattern (no change in particle size), and the adjustment accuracy of the charging schedule (the effect of changes in the particle size and the charging amount is (To minimize as much as possible) to stabilize the gas flow distribution in the furnace.

【0023】詳述すると、装入BC(ベルトコンベア)
から供給される原料は、二つの打込槽より排出され、ほ
ぼ均一でBC上に乗る。そして、上バンカー4に均一の
まま供給されるので、図3に示すように、内筒1内,内
筒1と外筒2との間、外筒2と壁側との間の順に再分級
することなく堆積し、即ち、偏析しなくなる。
More specifically, charging BC (belt conveyor)
The raw material supplied from is discharged from the two driving tanks and is almost evenly placed on the BC. Then, since it is uniformly supplied to the upper bunker 4, as shown in FIG. 3, reclassification is performed in the inner cylinder 1, between the inner cylinder 1 and the outer cylinder 2, and between the outer cylinder 2 and the wall side in this order. Without depositing, that is, no segregation occurs.

【0024】次に、この上バンカー4から下バンカー5
へ装入する時も、内筒1から同じように装入されてい
き、上バンカー4内と同じように堆積する。従って、上
バンカー4から炉内へ装入される時は、内筒1から順に
排出されていき、その排出粒径経時変化は、図4に示す
ように、フラットパターンとなる。
Next, the upper bunker 4 to the lower bunker 5
When charging into the upper bunker 4, the same charging is performed from the inner cylinder 1 as well. Therefore, when it is loaded into the furnace from the upper bunker 4, it is sequentially discharged from the inner cylinder 1, and the time-dependent change of the discharged particle diameter becomes a flat pattern as shown in FIG.

【0025】このフラットパターンであれば、粒度の変
化や装入量の変化の影響が小さくなり、ベルレス高炉特
有の装入スケジュール調整の精度も大幅にアップしてい
くことになる。また、装入BC上に原料を排出する時
に、細粒を先頭に切出せば、図5に示すように、下バン
カー5の真下に堆積し、図6に示すような、初期に細粒
が排出される粒径経時変化となり、炉壁流のコントロー
ルが、より精度アップすることになる。
With this flat pattern, the influence of the change in grain size and the change in the charging amount is reduced, and the accuracy of the charging schedule adjustment peculiar to the bellless blast furnace is greatly improved. Further, when the raw material is discharged onto the charging BC, if the fine particles are cut out at the head, the fine particles are deposited right below the lower bunker 5 as shown in FIG. 5, and the fine particles are initially formed as shown in FIG. The discharged particle size changes with time, and the control of the furnace wall flow will be more accurate.

【0026】なお、図3および図5における中は細,
中,粗粒の平均粒径であり、細は細粒のみである。ま
た、図5における排出順は、図3と同じ原理で、細,中
心,その外,壁側の順である。
The inside of FIGS. 3 and 5 is thin,
It is the average particle size of medium and coarse particles, and fine particles are only fine particles. Further, the discharging order in FIG. 5 is the same as that in FIG. 3, and is the order of thin, center, outer side, and wall side.

【0027】[0027]

【発明の効果】この発明の原料装入方法によれば、従来
の方法に比べ、センターフィードの構造的欠陥につい
て、上バンカーの偏析を防止するという点に主目的をお
き、上,下バンカー内における原料の再分級を確実に抑
制できる。
According to the raw material charging method of the present invention, the main purpose is to prevent segregation of the upper bunker with respect to the structural defect of the center feed, as compared with the conventional method. It is possible to reliably suppress the reclassification of the raw material.

【0028】また、上下の両バンカー内に設置される二
重管の偏析防止部によって、従来方法にみられた「初期
に粗粒、後期に細粒」という排出粒径経時変化をフラッ
トパターンにすることができ、装入スケジュールによる
調整精度をアップすることができる。
Further, due to the segregation preventive portions of the double pipes installed in both the upper and lower bunker, the discharge particle size change with time of "coarse particles in the initial stage and fine particles in the latter period" observed in the conventional method is made into a flat pattern. It is possible to improve the adjustment accuracy according to the charging schedule.

【0029】さらに、二重管である偏析防止部は、その
構造が単純であり、高温でダストが多いバンカー内で
も、故障等のトラブルの心配がなく、この点から実用的
にみても実炉に十分適用できる。
Furthermore, the segregation prevention part, which is a double pipe, has a simple structure, and there is no fear of trouble such as breakdown even in a bunker with a lot of dust at high temperature. Can be applied to

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の原料装入方法を実施するベルレス高
炉の原料装入装置における上下バンカーを示す概略図で
ある。
FIG. 1 is a schematic view showing upper and lower bunker in a raw material charging device of a bellless blast furnace for carrying out the raw material charging method of the present invention.

【図2】この発明の原料装入方法を実施する上下バンカ
ー内に設置される二重管の偏析防止部を示す概略斜視図
である。
FIG. 2 is a schematic perspective view showing a segregation preventing portion of a double pipe installed in the upper and lower bunker for carrying out the raw material charging method of the present invention.

【図3】この発明の偏析防止部を設置した時の原料堆積
状況を示す概略図である。
FIG. 3 is a schematic view showing a raw material deposition state when the segregation prevention unit of the present invention is installed.

【図4】この発明の偏析防止部を設置した時における排
出粒径経時変化を示すグラフである。
FIG. 4 is a graph showing changes over time in the discharged particle size when the segregation prevention unit of the present invention is installed.

【図5】この発明の偏析防止部を設置した時において、
細粒を先頭にして装入した時の原料堆積状況を示す概略
図である。
[Fig. 5] When the segregation prevention unit of the present invention is installed,
It is the schematic which shows the raw material deposition condition at the time of charging with a fine grain at the head.

【図6】この発明の偏析防止部を設置した時において、
細粒を先頭にして装入した時の排出粒径経時変化を示す
グラフである。
FIG. 6 shows a case where the segregation prevention unit of the present invention is installed,
It is a graph which shows the time-dependent change of the discharge particle size at the time of charging with a fine particle in front.

【図7】従来方法による一般的なセンターフィード型ベ
ルレス装入装置特有の原料排出挙動を示した概略図であ
る。
FIG. 7 is a schematic view showing a raw material discharge behavior peculiar to a general center feed type bellless charging device by a conventional method.

【図8】従来方法による一般的なセンターフィード型ベ
ルレス装入装置における下バンカーからお排出粒径経時
変化を示すグラフである。
FIG. 8 is a graph showing changes over time in the particle size discharged from the lower bunker in a general center feed type bellless charging device according to a conventional method.

【符号の説明】[Explanation of symbols]

1…内筒、2…外筒、3…偏析防止部、4…上バンカ
ー、4a…バンカー斜面、5a…バンカー斜面、5…下バン
カー。
1 ... inner cylinder, 2 ... outer cylinder, 3 ... segregation prevention part, 4 ... upper bunker, 4a ... bunker slope, 5a ... bunker slope, 5 ... lower bunker.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 炉頂の原料バンカー(ホッパー)が上下
に二段配置されている、所謂、センターフィード型のベ
ルレス装入装置を有する高炉において、炉内へ装入され
る原料の粒径経時変化を制御する原料装入方法であり、 前記上下両バンカーの内部に、内筒と外筒とがその間隔
を離間して設けられてなる二重管の偏析防止部を設置
し、この偏析防止部によって、炉上装入ベルトコンベア
からバンカーへ供給される原料を、バンカー内で再分級
(粒径分散)させずに上バンカーから下バンカーへと粒
度偏析のないまま装入し、 前記下バンカーから炉内へ排出する際の排出粒径経時変
化をフラットパターン(粒径変化なし)にして、装入ス
ケジュールの調整精度(粒度および装入量の変化の影響
を極力少なくする)をアップし、炉内におけるガス流分
布を安定させることを特徴とするベルレス高炉の原料装
入方法。
1. In a blast furnace having a so-called center-feed type bellless charging device in which raw material bunkers (hoppers) at the top of the furnace are arranged in two stages, a particle size of the raw material charged into the furnace over time. It is a raw material charging method for controlling the change, and inside the upper and lower bunker, a segregation prevention part of a double pipe is provided, in which an inner cylinder and an outer cylinder are provided with a space therebetween, and the segregation prevention is performed. Part, the raw material supplied from the furnace charging belt conveyor to the bunker is charged from the upper bunker to the lower bunker without particle size segregation without reclassification (particle size dispersion) in the bunker. The time-dependent change in the discharge particle size when discharged from the furnace to the furnace is made into a flat pattern (no change in particle size) to improve the adjustment accuracy of the charging schedule (to minimize the effect of changes in particle size and charging amount), Moth in the furnace Material charging process of bell-less blast furnace, characterized in that to stabilize the flow distribution.
JP21928692A 1992-08-18 1992-08-18 Method for charging raw material in bell-less blast furnace Pending JPH0665620A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21928692A JPH0665620A (en) 1992-08-18 1992-08-18 Method for charging raw material in bell-less blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21928692A JPH0665620A (en) 1992-08-18 1992-08-18 Method for charging raw material in bell-less blast furnace

Publications (1)

Publication Number Publication Date
JPH0665620A true JPH0665620A (en) 1994-03-08

Family

ID=16733127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21928692A Pending JPH0665620A (en) 1992-08-18 1992-08-18 Method for charging raw material in bell-less blast furnace

Country Status (1)

Country Link
JP (1) JPH0665620A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009029431A (en) * 2007-07-24 2009-02-12 Minabe Kako Kk Hopper for preventing particle size segregation
CN103403193A (en) * 2011-05-31 2013-11-20 新日铁住金株式会社 Starting material charging device for blast furnace, and starting material charging method using same
CN112427291A (en) * 2020-10-16 2021-03-02 日昌升建筑新材料设计研究院有限公司 Material distribution system and method for aggregate mine grading vibrating screen equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009029431A (en) * 2007-07-24 2009-02-12 Minabe Kako Kk Hopper for preventing particle size segregation
CN103403193A (en) * 2011-05-31 2013-11-20 新日铁住金株式会社 Starting material charging device for blast furnace, and starting material charging method using same
CN112427291A (en) * 2020-10-16 2021-03-02 日昌升建筑新材料设计研究院有限公司 Material distribution system and method for aggregate mine grading vibrating screen equipment
CN112427291B (en) * 2020-10-16 2023-11-10 日昌升建筑新材料设计研究院有限公司 Material distribution system and method for aggregate mine grading vibrating screen equipment

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