JP5810509B2 - Material segregation equipment for blast furnace top bunker - Google Patents

Material segregation equipment for blast furnace top bunker Download PDF

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JP5810509B2
JP5810509B2 JP2010250078A JP2010250078A JP5810509B2 JP 5810509 B2 JP5810509 B2 JP 5810509B2 JP 2010250078 A JP2010250078 A JP 2010250078A JP 2010250078 A JP2010250078 A JP 2010250078A JP 5810509 B2 JP5810509 B2 JP 5810509B2
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raw material
segregation
bunker
blast furnace
distributor
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JP2011132597A (en
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隆史 大友
隆史 大友
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JFE Steel Corp
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/20—Arrangements of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots
    • F27D2003/105—Charging directly from hoppers or shoots using shutters

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Manufacture Of Iron (AREA)

Description

本発明は、高炉の炉頂に設けられた装入原料のバンカーに関し、特に原料を偏析しながらバンカー内に装入するのに好適なものである。   The present invention relates to a charging material bunker provided at the top of a blast furnace, and is particularly suitable for charging the material into the bunker while segregating the material.

高炉の炉頂には、装入原料、例えば鉄鉱石とコークスとを個別に貯留するバンカーが複数設けられている。下記特許文献１では、原料条件、分配パターン、原料流出量特性に基づいて、バンカーの下端部の流量調整ゲートの開度と、その下方の分配シュートの旋回速度を制御することで、高炉内への原料の分配自由度を高めている。
ところで、高炉炉頂バンカーに装入する原料の偏析技術が開発されている。具体的には、原料の挿入位置を設定することで原料の粒度を偏析させることができる。そして、このようにバンカー内の原料粒度を偏析させることで、高炉への装入特性を制御することが可能となる。このバンカー内への原料偏析のために、下記特許文献２では、バンカーの装入口下方に、水平軸の回りに回転可能な偏析板を設け、この偏析板の傾斜角度を変更したり、傾斜の方向を変更したりすることにより、バンカー内への原料の偏析を制御している。 At the top of the blast furnace, there are provided a plurality of bunker for individually storing charging materials such as iron ore and coke. In the following Patent Document 1, based on the raw material conditions, the distribution pattern, and the raw material outflow characteristic, the opening of the flow rate adjustment gate at the lower end of the bunker and the turning speed of the distribution chute below the bunker are controlled. Increases the degree of freedom of distribution of raw materials.
By the way, the segregation technology of the raw material charged into the blast furnace top bunker has been developed. Specifically, the particle size of the raw material can be segregated by setting the insertion position of the raw material. And it becomes possible to control the charging characteristic to a blast furnace by segregating the raw material particle size in a bunker in this way. In order to segregate the raw material into the bunker, in Patent Document 2 below, a segregation plate that can rotate around the horizontal axis is provided below the bunker inlet, and the inclination angle of the segregation plate can be changed. The segregation of the raw material into the bunker is controlled by changing the direction.

特開昭５４−３１００５号公報JP 54-31005 A 特開２００８−１７９８９９号公報JP 2008-179899 A

しかしながら、前記特許文献２に記載される水平軸回りに回転可能な偏析板は、その回転時にバンカーの内壁と干渉する恐れがあるため、長さが規制され、原料をバンカーの内壁直近に装入させることができず、原料偏析効果に限界があるという問題がある。
本発明は、上記のような問題点に着目してなされたものであり、原料をバンカーの内壁直近に装入することができ、原料偏析効果を高めることが可能な高炉炉頂バンカーの原料偏析装置を提供することを目的とするものである。 However, since the segregation plate that can rotate around the horizontal axis described in Patent Document 2 may interfere with the inner wall of the bunker during the rotation, the length is regulated, and the raw material is charged in the vicinity of the inner wall of the bunker. There is a problem that the raw material segregation effect is limited.
The present invention has been made paying attention to the above-mentioned problems, the raw material segregation of the blast furnace top bunker can be charged in the immediate vicinity of the inner wall of the bunker, and can enhance the raw material segregation effect The object is to provide an apparatus.

上記課題を解決するために、本発明の高炉炉頂バンカーの原料偏析装置は、高炉の炉頂に設けられたバンカーに原料を偏析して装入する偏析装置であって、前記バンカーの横断面中央部の鉛直軸回りに回転可能で且つ上方から装入される原料を受ける上下方向下側面の傾斜角が当該原料の安息角より大きい偏析分配器をバンカー内の上部に備えたことを特徴とするものである。 In order to solve the above-mentioned problems, a raw material segregation apparatus for a blast furnace top bunker according to the present invention is a segregation apparatus for segregating and charging a raw material into a bunker provided at the top of a blast furnace furnace. A segregation distributor is provided in the upper part of the bunker where the inclination angle of the lower surface in the vertical direction that is rotatable about the vertical axis at the center and receives the raw material charged from above is larger than the repose angle of the raw material. To do.

また、前記偏析分配器は、軸線が斜め下向きの円錐台筒で且つバンカーの内壁側部分を切除した形状であることを特徴とするものである。
また、前記偏析分配器の軸線の傾斜角を変更可能としたことを特徴とするものである。
また、前記偏析分配器は、バンカーの横断面中央部に設けられている鉛直回転軸に接続されたモータにより鉛直回転軸回りに回転することを特徴とするものである。 Further, the segregation distributor is characterized in that the axis is a truncated cone having an oblique downward direction and the inner wall side portion of the bunker is cut away.
In addition, the inclination angle of the axis of the segregation distributor can be changed.
Further, the segregation distributor is characterized in that it is rotated around the vertical rotation axis by a motor connected to the vertical rotation axis provided at the center of the cross section of the bunker.

また、前記偏析分配器は、水平回転軸に接続されたモータにより水平回転軸回りに上下方向に傾動することを特徴とするものである。   Further, the segregation distributor is tilted in the vertical direction around the horizontal rotation axis by a motor connected to the horizontal rotation axis.

而して、本発明の高炉炉頂バンカーの原料偏析装置によれば、バンカーの横断面中央部の鉛直軸周りに回転可能で且つ上方から装入される原料を受ける上下方向下側面の傾斜角が当該原料の安息角より大きい偏析分配器を、当該バンカー内の上部に設けたことにより、偏析分配器の向きを変更する場合に当該偏析分配器がバンカーの内壁に干渉する恐れがなく、その結果、偏析分配器の原料落とし口をバンカーの内壁直近に近づけることができ、これにより原料偏析効果を高めることができる。 Thus, according to the raw material segregation apparatus for the blast furnace top bunker of the present invention, the inclination angle of the lower surface in the vertical direction that receives the raw material that can rotate around the vertical axis of the central portion of the cross section of the bunker and is charged from above. By providing a segregation distributor larger than the angle of repose of the raw material at the top of the bunker, the segregation distributor does not interfere with the inner wall of the bunker when changing the direction of the segregation distributor. As a result, the raw material outlet of the segregation distributor can be brought closer to the inner wall of the bunker, thereby increasing the raw material segregation effect.

また、偏析分配器を、軸線が斜め下向きの円錐台筒で且つバンカーの内壁側部分を切除した形状としたことにより、原料の落とし口を安定化することができると共に、バンカーの内壁との干渉を確実に回避することができる。
また、偏析分配器の軸線の傾斜角を変更可能としたことにより、原料の落とし口を自在に調整することができ、偏析効果の制御が可能となる。 In addition, the segregation distributor is shaped like a truncated cone whose axis is obliquely downward and the inner wall side portion of the bunker is cut away, so that the material outlet can be stabilized and interfere with the inner wall of the bunker. Can be reliably avoided.
In addition, since the tilt angle of the axis of the segregation distributor can be changed, the outlet of the raw material can be freely adjusted, and the segregation effect can be controlled.

また、バンカーの横断面中央部に設けられている鉛直回転軸に接続されたモータにより偏析分配器を鉛直回転軸回りに回転することにより、原料の落とし口を自在に調整することができ、偏析効果の制御が可能となる。
また、水平回転軸に接続されたモータにより水平回転軸回りに偏析分配器を上下方向に傾動することにより、原料の落とし口を自在に調整することができ、偏析効果の制御が可能となる。 Moreover, by rotating the segregation distributor around the vertical rotation axis by a motor connected to the vertical rotation shaft provided in the center of the cross section of the bunker, the material outlet can be freely adjusted, and the segregation The effect can be controlled.
Further, by tilting the segregation distributor up and down around the horizontal rotation axis by a motor connected to the horizontal rotation axis, the raw material outlet can be freely adjusted, and the segregation effect can be controlled.

本発明の原料偏析装置が適用された高炉炉頂バンカーの一実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows one Embodiment of the blast furnace top bunker to which the raw material segregation apparatus of this invention was applied. 図１の偏析分配器の説明図である。It is explanatory drawing of the segregation distributor of FIG. バンカー内における原料偏析効果の説明図であり、図３ａは、装入原料の落とし口を滑落抵抗の小さい鉛直面側に設定した説明図であり、図３ｂは、装入原料の落とし口を滑落抵抗の大きい斜面側に設定した説明図である。FIG. 3a is an explanatory diagram in which the charging material outlet is set on the vertical surface side where the sliding resistance is small, and FIG. 3b is the charging material sliding down. It is explanatory drawing set to the slope side with large resistance. 従来の原料偏析装置の説明図である。It is explanatory drawing of the conventional raw material segregation apparatus.

次に、本発明の高炉炉頂バンカー原料偏析装置の一実施形態について図面を参照しながら説明する。
図１は、本実施形態のセルフライニング構造が適用された高炉炉頂部の縦断面図である。高炉１の炉頂部上方には複数のバンカー２が設けられている。バンカー２は、夫々、高炉１内への装入原料３を貯留するものである。装入原料３には、コークスや鉄鉱石が挙げられる。バンカー２の上端部にはゲート１６が設けられており、このゲート１６を開くことで、図に太い矢印で示すように、装入原料３がバンカー２内に装入される。また、バンカー２の下端部にはゲート４が設けられており、このゲート４を開くことで、内部の装入原料３が高炉１内に落下する。ゲート４の下方で、高炉１の炉頂内部には分配シュート５が設けられており、この分配シュート５を旋回することで落下する装入原料３を高炉１の炉内に分配することができる。そして、本実施形態では、バンカー２の内部上方に、本実施形態の原料偏析装置が設けられている。本実施形態の原料偏析装置は、バンカー２の横断面中央部の鉛直軸２０回りに回転可能で且つ上方からの装入原料３を受ける上下方向下側面１２が当該装入原料３の安息角より大きい偏析分配器６をバンカー２内の上部に備えている。 Next, an embodiment of the blast furnace top bunker raw material segregation apparatus of the present invention will be described with reference to the drawings.
FIG. 1 is a vertical cross-sectional view of a blast furnace top portion to which the cell flying structure of the present embodiment is applied. A plurality of bunker 2 is provided above the top of the blast furnace 1. The bunker 2 stores the raw material 3 charged into the blast furnace 1, respectively. Examples of the charging raw material 3 include coke and iron ore. A gate 16 is provided at the upper end of the bunker 2, and by opening the gate 16, the charging raw material 3 is charged into the bunker 2 as indicated by a thick arrow in the figure. In addition, a gate 4 is provided at the lower end of the bunker 2, and the internal charging material 3 falls into the blast furnace 1 by opening the gate 4. Below the gate 4, a distribution chute 5 is provided inside the furnace top of the blast furnace 1, and by dropping the distribution chute 5, the dropped raw material 3 can be distributed into the furnace of the blast furnace 1. . And in this embodiment, the raw material segregation apparatus of this embodiment is provided above the inside of the bunker 2. In the raw material segregation apparatus of the present embodiment, the lower side surface 12 in the vertical direction that can rotate about the vertical axis 20 at the center of the cross section of the bunker 2 and receives the charged raw material 3 from above is from the angle of repose of the charged raw material 3 A large segregation distributor 6 is provided in the upper part of the bunker 2.

図２は、本実施形態の原料偏析装置に用いられる偏析分配器６である。図２ａは、図１と同じく偏析分配器６の正面図であり、図２ｂは、図２ａのＺ矢視図であり、図２ｃは、図２ｂのＹ矢視図である。この偏析分配器６は、軸線１８が斜め下方向きの円錐台筒であり、図２ａに破線で示すバンカー２の内壁側を切除した形状となっている。また、この偏析分配器６の上下方向上側部は装入原料３との干渉を回避するために開口されている。また、図中の符号６ａは偏析分配器６の装入原料案内面である。この偏析分配器６を、バンカー２の内部上部で、ハンガー７に取付ける。バンカー２の上方から装入原料３が装入されると偏析分配器６の上下方向下側面１２の上に落下する。偏析分配器６の上下方向下側面１２は、装入原料３の安息角より大きな傾斜角にしてあるため、偏析分配器６上に落下した装入原料３は、斜め下端部の落とし口１４からバンカー２内に落下する。なお、本実施形態の偏析分配器６は、図２ｃに示すような円弧断面形状としたが、これに限定されるものではなく、円形断面形状、楕円形断面形状、多角形断面形状であってもよい。 FIG. 2 shows a segregation distributor 6 used in the raw material segregation apparatus of this embodiment. 2a is a front view of the segregation distributor 6 as in FIG. 1, FIG. 2b is a view as viewed from the arrow Z in FIG. 2a, and FIG. 2c is a view as viewed from the arrow Y in FIG. This segregation distributor 6 is a truncated cone whose axis 18 is obliquely downward, and has a shape in which the inner wall side of the bunker 2 shown by a broken line in FIG. Further, the upper part in the vertical direction of the segregation distributor 6 is opened to avoid interference with the charged raw material 3. Reference numeral 6a in the figure is a charged material guide surface of the segregation distributor 6. This segregation distributor 6 is attached to the hanger 7 at the upper part inside the bunker 2. When the charged raw material 3 is charged from above the bunker 2, it falls on the lower side surface 12 in the vertical direction of the segregation distributor 6. Since the lower surface 12 in the vertical direction of the segregation distributor 6 has an inclination angle larger than the angle of repose of the charged raw material 3, the charged raw material 3 that has fallen on the segregated distributor 6 passes through the outlet 14 at the oblique lower end. Fall into the bunker 2. The segregation distributor 6 of the present embodiment has an arc cross-sectional shape as shown in FIG. 2c, but is not limited to this, and has a circular cross-sectional shape, an elliptical cross-sectional shape, and a polygonal cross-sectional shape. Also good.

前記ハンガー７は、バンカー２の横断面中央部に設けられている鉛直回転軸２２に取付けられており、この鉛直回転軸２２にモータ８が接続されている。鉛直回転軸２２とモータ８は直結である必要はなく、例えば減速歯車機構を介装するなどしてもよい。その結果、ハンガー７に取付けられている偏析分配器６は、バンカー２の横断面中央部に設けられた鉛直回転軸２２回りに、図１の矢印ａ方向に回転し、これにより偏析分配器６とバンカー２の内壁とが干渉することなく、偏析分配器６の斜め下端部の装入原料３の落とし口１４の向きを変更調整することができる。また、本実施形態の偏析分配器６は、軸線１８が斜め下向きの円錐台筒で且つバンカー２の内壁側が切除された形状であるため、装入原料３が落下する偏析分配器６の斜め下端部の落とし口１４をバンカー２の内壁の直近に設定することができる。   The hanger 7 is attached to a vertical rotation shaft 22 provided at the center of the cross section of the bunker 2, and a motor 8 is connected to the vertical rotation shaft 22. The vertical rotation shaft 22 and the motor 8 do not need to be directly connected, and may be provided with a reduction gear mechanism, for example. As a result, the segregation distributor 6 attached to the hanger 7 rotates around the vertical rotation shaft 22 provided at the center of the cross section of the bunker 2 in the direction of arrow a in FIG. And the inner wall of the bunker 2 do not interfere with each other, and the direction of the outlet 14 of the charging material 3 at the oblique lower end of the segregation distributor 6 can be changed and adjusted. Further, the segregation distributor 6 of the present embodiment has a shape in which the axis 18 is an obliquely downward truncated cone and the inner wall side of the bunker 2 is cut off, so that the oblique lower end of the segregation distributor 6 from which the charged raw material 3 falls. It is possible to set the outlet 14 of the part in the immediate vicinity of the inner wall of the bunker 2.

また、偏析分配器６は、水平な回転軸を介してハンガー７に回転自在に取付けられており、この水平な回転軸にモータ９が接続されている。水平回転軸とモータ９は直結である必要はなく、例えば減速歯車機構を介装するなどしてもよい。その結果、ハンガー７に取付けられている偏析分配器６は水平回転軸の回りに、図の矢印ｂで示す上下方向に回転（傾動）可能であり、その結果、偏析分配器６の斜め下端部の装入原料３の落とし口１４の位置を変更調整することができる。   The segregation distributor 6 is rotatably attached to the hanger 7 via a horizontal rotating shaft, and a motor 9 is connected to the horizontal rotating shaft. The horizontal rotation shaft and the motor 9 do not have to be directly connected, and for example, a reduction gear mechanism may be interposed. As a result, the segregation distributor 6 attached to the hanger 7 can rotate (tilt) in the vertical direction shown by the arrow b in the figure around the horizontal rotation axis. As a result, the oblique lower end portion of the segregation distributor 6 It is possible to change and adjust the position of the outlet 14 of the charging raw material 3.

図３は、バンカー２内における原料偏析効果の説明図である。図のバンカー２では、効果を分かり易くするために、各図の右下側の斜面が、原料滑落の際、抵抗の大きい側を示し、各図の左側の鉛直面が、抵抗の小さい側を示している。図１の場合は、ゲート４に向けて連続する斜面は原料滑落の抵抗が小さく、一旦、屈曲する斜面は原料滑落の抵抗が大きい。   FIG. 3 is an explanatory diagram of the raw material segregation effect in the bunker 2. In the bunker 2 in the figure, in order to make the effect easy to understand, the slope on the lower right side of each figure shows the side with higher resistance when the raw material slides, and the vertical plane on the left side of each figure shows the side with lower resistance. Show. In the case of FIG. 1, the slope that continues toward the gate 4 has a low resistance to material sliding, and the slope that once bends has a large resistance to sliding.

装入原料３を狭い落とし口１４から装入すると、装入原料３は山状に堆積しようとする。この山状堆積状態の斜面角度が安息角である。装入原料３に、種々の粒度が混在する場合、粒度の大きな装入原料３は、山状堆積状態の斜面に沿って転落し、粒度の小さな装入原料３は、山状堆積状態の頂部に留まる。これがパーコレーションと呼ばれる原料偏析効果である。パーコレーションは、山状堆積状態の斜面長さが長いほど、効果の大きなことが知られている。   When the charging raw material 3 is charged from the narrow drop port 14, the charging raw material 3 tends to accumulate in a mountain shape. The angle of slope in this mountain-like piled state is the angle of repose. When the charging raw material 3 includes various particle sizes, the charging raw material 3 having a large particle size falls down along the slope of the mountain-like accumulation state, and the charging raw material 3 having a small particle size is the top of the mountain-like accumulation state. Stay on. This is a raw material segregation effect called percolation. It is known that percolation is more effective as the slope length in a mountain-like piled state is longer.

図３ａは、装入原料３の落とし口１４を滑落抵抗の小さい鉛直面側に設定し、図３ｂは、装入原料３の落とし口１４を滑落抵抗の大きい斜面側に設定した場合を示している。図３ａの場合、粒度の大きな装入原料３は滑落抵抗の大きな斜面側に集積し、粒度の小さな装入原料３は滑落抵抗の小さな鉛直面側に集積する。この状態から、装入原料３の落下を開始すると、まず粒度の小さな装入原料３が最初に落下し、次いで粒度の中程度の装入原料３が落下し、最後に粒度の大きな装入原料３が落下する。一方、図３ｂの場合、粒度の大きな装入原料３は滑落抵抗の小さな鉛直面側に集積し、粒度の小さな装入原料３は滑落抵抗の大きな斜面側に集積する。この状態から、装入原料３の落下を開始すると、まず粒度の大きな装入原料３が最初に落下し、次いで粒度の中程度の装入原料３が落下し、最後に粒度の小さな装入原料３が落下する。   FIG. 3a shows the case where the drop 14 of the charging material 3 is set on the vertical surface side where the sliding resistance is small, and FIG. 3b shows the case where the dropping port 14 of the charging material 3 is set on the slope side where the sliding resistance is large. Yes. In the case of FIG. 3a, the charging raw material 3 having a large particle size accumulates on the slope side having a large sliding resistance, and the charging raw material 3 having a small particle size accumulates on the vertical surface side having a small sliding resistance. From this state, when the dropping of the charging raw material 3 is started, the charging raw material 3 with a small particle size first falls first, then the medium charging raw material 3 with a small particle size falls, and finally the charging raw material with a large particle size. 3 falls. On the other hand, in the case of FIG. 3b, the charging raw material 3 having a large particle size accumulates on the vertical surface side having a small sliding resistance, and the charging raw material 3 having a small particle size accumulates on the slope side having a large sliding resistance. From this state, when the dropping of the charging raw material 3 is started, the charging raw material 3 having a large particle size first falls first, then the medium charging raw material 3 falls, and finally the charging raw material having a small particle size. 3 falls.

このような原料偏析効果並びに原料落下粒度効果を用いれば、高炉１内への装入原料３の粒度制御が可能となる。その場合、本実施形態の原料偏析装置では、偏析分配器６は、バンカー２の横断面中央部に設けられた鉛直回転軸２２回りに偏析分配器６が回転するので、偏析分配器６とバンカー２の内壁とが干渉することなく、偏析分配器６の斜め下端部の装入原料３の落とし口１４の向きを変更調整することができ、且つ軸線が斜め下向きの円錐台筒で且つバンカー２の内壁側が切除された形状の偏析分配器６を用いているため、装入原料３が落下する偏析分配器６の斜め下端部の落とし口１４をバンカー２の内壁の直近に設定することができ、その結果、装入原料３の山状堆積状態の斜面長さを最大にすることができ、原料偏析効果が大きい。   If such a raw material segregation effect and a raw material falling particle size effect are used, it is possible to control the particle size of the raw material 3 charged into the blast furnace 1. In that case, in the raw material segregation apparatus of the present embodiment, the segregation distributor 6 rotates around the vertical rotation shaft 22 provided in the center of the cross section of the bunker 2. The direction of the outlet 14 of the charging material 3 at the oblique lower end of the segregation distributor 6 can be changed and adjusted without interfering with the inner wall of the segregation distributor 6, and the bunker 2 is a truncated cone with the axis inclined obliquely downward. Since the segregation distributor 6 having a shape in which the inner wall side is cut off is used, the drop port 14 at the oblique lower end of the segregation distributor 6 from which the charging raw material 3 falls can be set in the immediate vicinity of the inner wall of the bunker 2. As a result, it is possible to maximize the slope length of the charged raw material 3 in the mountain-like accumulation state, and the raw material segregation effect is great.

図４は、従来の高炉炉頂バンカーの原料偏析装置の一例を示す概略構成図である。従来の原料偏析装置は、例えばバンカー２の上方に、水平軸回りに回転可能な偏析板Ｂを設け、装入される原料を偏析板Ｂで受け、偏析板Ｂの傾斜方向に原料を滑落させて偏析効果を図る。しかしながら、水平軸回りに回転可能な偏析板Ｂは、バンカー２の内壁との干渉を回避するため、長さが規制される。偏析板Ｂの長さが短いと、原料の落とし口をバンカー２の内壁の直近に設定することができず、その結果、原料の山状堆積状態の斜面長さが短くなり、原料偏析効果が十分に得られないという問題が生じる。   FIG. 4 is a schematic configuration diagram showing an example of a raw material segregation apparatus for a conventional blast furnace top bunker. A conventional material segregation apparatus is provided with, for example, a segregation plate B that can rotate around a horizontal axis above a bunker 2, receives the material to be charged by the segregation plate B, and slides the material in the tilt direction of the segregation plate B. To improve the segregation effect. However, the length of the segregation plate B that can rotate around the horizontal axis is restricted in order to avoid interference with the inner wall of the bunker 2. If the length of the segregation plate B is short, the raw material outlet cannot be set in the immediate vicinity of the inner wall of the bunker 2, and as a result, the slope length of the raw material piled up becomes short, and the raw material segregation effect is achieved. There arises a problem that it cannot be obtained sufficiently.

このように本実施形態の高炉炉頂バンカーの原料偏析装置では、バンカー２の横断面中央部の鉛直軸２０周りに回転可能で且つ上方から装入される装入原料３を受ける上下方向下側面１２の傾斜角が当該装入原料３の安息角より大きい偏析分配器６を、当該バンカー２内の上部に設けたため、偏析分配器６の向きを変更する場合に当該偏析分配器６がバンカー２の内壁に干渉する恐れがなく、その結果、偏析分配器６の装入原料３の落とし口１４をバンカー２の内壁直近に近づけることができ、これにより原料偏析効果を高めることができる。 Thus, in the raw material segregation apparatus for the blast furnace top bunker of the present embodiment, the lower side in the vertical direction that receives the charged raw material 3 that can rotate around the vertical axis 20 at the center of the cross section of the bunker 2 and is charged from above. Since the segregation distributor 6 having an inclination angle of 12 larger than the repose angle of the charging raw material 3 is provided in the upper part of the bunker 2, the segregation distributor 6 is not included in the bunker 2 when the orientation of the segregation distributor 6 is changed. As a result, the outlet 14 of the charged raw material 3 of the segregation distributor 6 can be brought close to the inner wall of the bunker 2, thereby enhancing the raw material segregation effect.

また、偏析分配器６を、軸線１８が斜め下向きの円錐台筒で且つバンカー２の内壁側部分を切除した形状としたため、装入原料３の落とし口１４を安定化することができると共に、バンカー２の内壁との干渉を確実に回避することができる。
また、偏析分配器６の軸線１８の傾斜角を変更可能としたことにより、装入原料３の落とし口１４を自在に調整することができ、偏析効果の制御が可能となる。 Further, since the segregation distributor 6 has a shape of a truncated cone whose axis 18 is obliquely downward and the inner wall side portion of the bunker 2 is cut away, the outlet 14 of the charging raw material 3 can be stabilized, and the bunker Interference with the two inner walls can be avoided reliably.
In addition, since the inclination angle of the axis 18 of the segregation distributor 6 can be changed, the outlet 14 of the charging raw material 3 can be freely adjusted, and the segregation effect can be controlled.

また、バンカー２の横断面中央部に設けられている鉛直回転軸２２に接続されたモータ８により偏析分配器６を鉛直回転軸２２回りに回転することにより、装入原料３の落とし口１４を自在に調整することができ、偏析効果の制御が可能となる。
また、水平回転軸に接続されたモータ９により水平回転軸回りに偏析分配器６を上下方向に傾動することにより、装入原料３の落とし口１４を自在に調整することができ、偏析効果の制御が可能となる。 Further, by rotating the segregation distributor 6 around the vertical rotation shaft 22 by the motor 8 connected to the vertical rotation shaft 22 provided in the central portion of the cross section of the bunker 2, the outlet 14 of the charging raw material 3 is removed. It can be freely adjusted, and the segregation effect can be controlled.
Further, by tilting the segregation distributor 6 up and down around the horizontal rotation axis by the motor 9 connected to the horizontal rotation axis, the outlet 14 of the charged raw material 3 can be freely adjusted, and the segregation effect can be improved. Control becomes possible.

１ 高炉
２ バンカー
３ 装入原料
４ ゲート
５ 分配シュート
６ 偏析分配器
６ａ 装入原料案内面
７ ハンガー
８、９ モータ
１２ 上下方向下側面
１４ 落とし口
１６ ゲート
１８ 軸線
２０ 鉛直軸
２２ 鉛直回転軸 DESCRIPTION OF SYMBOLS 1 Blast furnace 2 Bunker 3 Charged raw material 4 Gate 5 Distribution chute 6 Segregation distributor 6a Charged raw material guide surface 7 Hanger 8, 9 Motor 12 Vertical bottom surface 14 Drop port 16 Gate 18 Axis 20 Vertical axis 22 Vertical rotation axis

Claims (4)

高炉の炉頂に設けられたバンカーに原料を偏析して装入する偏析装置であって、前記バンカーの横断面中央部の鉛直軸回りに回転可能で且つ上方から装入される原料を受ける上下方向下側面の傾斜角が当該原料の安息角より大きい偏析分配器をバンカー内の上部に備え、前記偏析分配器は、軸線が斜め下向きの円錐台筒で且つバンカーの内壁側部分に相当する下方先端部上側部分を切除した形状であることを特徴とする高炉炉頂バンカーの原料偏析装置。 A segregation apparatus for segregating and charging raw material in a bunker provided at the top of a blast furnace, and capable of rotating around a vertical axis at the center of the cross section of the bunker and receiving the raw material charged from above A segregation distributor having an inclination angle of the lower side surface larger than the angle of repose of the raw material is provided in the upper part of the bunker. A raw material segregation apparatus for a blast furnace top bunker, characterized in that it has a shape obtained by cutting away the upper part of the tip . 前記偏析分配器の軸線の傾斜角を変更可能としたことを特徴とする請求項１に記載の高炉炉頂バンカーの原料偏析装置。 The raw material segregation apparatus for a blast furnace top bunker according to claim 1 , wherein an inclination angle of an axis of the segregation distributor can be changed. 前記偏析分配器は、バンカーの横断面中央部に設けられている鉛直回転軸に接続されたモータにより鉛直回転軸回りに回転することを特徴とする請求項１に記載の高炉炉頂バンカーの原料偏析装置。   2. The raw material for a blast furnace top bunker according to claim 1, wherein the segregation distributor is rotated about a vertical rotation axis by a motor connected to a vertical rotation axis provided in a central portion of a cross section of the bunker. Segregation equipment. 前記偏析分配器は、水平回転軸に接続されたモータにより水平回転軸回りに上下方向に傾動することを特徴とする請求項１に記載の高炉炉頂バンカーの原料偏析装置。   2. The material segregation apparatus for a blast furnace top bunker according to claim 1, wherein the segregation distributor is tilted up and down around a horizontal rotation axis by a motor connected to the horizontal rotation axis.
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