JP2968410B2 - Scrap charging method in blast furnace - Google Patents
Scrap charging method in blast furnaceInfo
- Publication number
- JP2968410B2 JP2968410B2 JP6737493A JP6737493A JP2968410B2 JP 2968410 B2 JP2968410 B2 JP 2968410B2 JP 6737493 A JP6737493 A JP 6737493A JP 6737493 A JP6737493 A JP 6737493A JP 2968410 B2 JP2968410 B2 JP 2968410B2
- Authority
- JP
- Japan
- Prior art keywords
- scrap
- ore
- charging
- coke
- charged
- 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.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Manufacture Of Iron (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は高炉におけるスクラップ
の装入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 method for charging scrap in a blast furnace.
【０００２】[0002]
【従来の技術】従来は装入装置の通路で詰まらない程度
のサイズのスクラップを鉱石と混合したバッチか、又は
スクラップ単独のバッチで、炉口部の装入域を限定せず
に広い範囲に層状に装入していた。この場合スクラップ
の粒度管理をしていないため、装入物の粒度分布は管理
されていない欠点があった。また、スクラップの比重が
大きいため、既装入面を崩す欠点があった。2. Description of the Related Art Conventionally, a batch in which scrap having a size such that it is not clogged in a passage of a charging device with ore, or a batch of scrap alone, can be used in a wide range without limiting the charging area of a furnace mouth. They were charged in layers. In this case, since the particle size of the scrap was not controlled, there was a disadvantage that the particle size distribution of the charge was not controlled. In addition, since the specific gravity of the scrap is large, there is a defect that the already-loaded surface is broken.
【０００３】上記欠点の改善策として、スクラップを鉱
石と同様の粒度５ｍｍから３０ｍｍの範囲に整粒し上述
と同様の方法で装入する方法が行われているが、装入物
の粒度分布は改善されたものの、スクラップの比重が大
きいため、既装入面を崩す欠点は改善されていない。ま
た、スクラップの整粒費用が高価である。図２はスクラ
ップを鉱石と混合して炉口部の広い範囲に層状に装入し
た例であり、比重が大きいスクラップと鉱石の混合物１
１がコークス８の層を深く崩している。図２で１２はコ
ークス８を削り込んで厚くなったスクラップと鉱石の混
合層を示す。図中１は大ベル、２はムーバブルアーマ
ー、４は炉壁を示す。[0003] As a measure for remedying the above-mentioned disadvantage, a method has been practiced in which scrap is sized to a range of 5 mm to 30 mm similar to that of ore and charged in the same manner as described above. Although improved, the specific gravity of the scrap is large, so the drawback of breaking the already installed surface has not been improved. In addition, the cost of sizing the scrap is high. FIG. 2 shows an example in which scrap is mixed with ore and charged in a layered manner over a wide area of the furnace opening, and a mixture of scrap and ore having a large specific gravity 1
1 has deeply collapsed the layer of coke 8. In FIG. 2, reference numeral 12 denotes a mixed layer of scrap and ore obtained by cutting coke 8 and increasing its thickness. In the figure, 1 is a large bell, 2 is a movable armor, and 4 is a furnace wall.
【０００４】[0004]
【発明が解決しようとする課題】鉱石を高炉に装入する
際、鉱石粒度及び鉱石銘柄の円周方向分布均一性と半径
方向均一性、又は管理された偏析が要求される。スクラ
ップを鉱石の一部に代替する場合も同様の分布が要求さ
れる。このため、スクラップを鉱石と同様の粒度例え
ば、５ｍｍから３０ｍｍの範囲に整粒することが必要で
あり、このスクラップの整粒費用が高価である。一方、
スクラップを整粒せずに装入すると、装入物の粒度分布
管理ができないため、高炉操業が安定しない問題があ
る。When the ore is charged into the blast furnace, uniformity in the circumferential distribution and radial uniformity of the ore grain size and ore brand or controlled segregation is required. Similar distribution is required when scrap is replaced with some ore. For this reason, it is necessary to size the scrap to a particle size similar to that of the ore, for example, in the range of 5 mm to 30 mm, and the cost of sizing the scrap is high. on the other hand,
If the scrap is charged without sizing, the blast furnace operation is not stable because the particle size distribution of the charge cannot be controlled.
【０００５】また、スクラップを鉱石と同様に装入する
と、鉱石とスクラップの比重の差異により、装入物分布
制御が鉱石単味の装入に比し既装入物の分布を崩しやす
く、装入物分布が安定しない。本発明の目的は高炉への
スクラップ装入に伴うスクラップ整粒費用を軽減すると
ともに、分布制御を容易に行える手段を提供することで
ある。[0005] When scrap is charged in the same manner as ore, the distribution of the charged material is more likely to be disrupted than in the case of plain ore due to the difference in specific gravity between the ore and the scrap. Incoming distribution is not stable. SUMMARY OF THE INVENTION An object of the present invention is to reduce the cost of scrap sizing associated with charging scrap into a blast furnace and to provide means for easily controlling the distribution.
【０００６】[0006]
【課題を解決するための手段】本発明は前記課題を解決
するものであって、鉱石の一部をスクラップに置き換え
て装入する高炉でのスクラップ装入法において、鉱石又
はコークス装入後にスクラップを炉口径の２分の１以内
の中心部に３０ｍｍ超〜２００ｍｍに整粒されたスクラ
ップを装入することを特徴とする。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems. In a scrap charging method in a blast furnace in which a part of ore is replaced with scrap, the scrap is charged after charging the ore or coke. Is characterized in that a scrap having a size of more than 30 mm to 200 mm is charged into a central portion within one half of a furnace diameter.
【０００７】[0007]
【作用】本発明においてはコークスと鉱石の交互層状装
入よりなる各チャージ毎又は数チャージ毎に、コークス
又は鉱石の装入後にスクラップを中心部に装入する。こ
れによりスクラップは炉頂部装入物により形成される逆
円錐状空間を埋める形で装入されるため、装入後移動せ
ず中心部のみに存在し、円周方向の粒度、銘柄の分布均
一性が維持される。また、装入されたスクラップが既に
装入されたコークスや鉱石の層を崩さないため、コーク
ス及び鉱石の分布に悪影響せず、半径方向の分布制御が
容易となる。According to the present invention, the scrap is charged into the center after charging the coke or the ore at each charge or every several charges composed of alternate layered charging of the coke and the ore. As a result, the scrap is charged so as to fill the inverted conical space formed by the furnace top charge, so it does not move after charging and exists only in the center, and the circumferential grain size and brand distribution are uniform. Sex is maintained. Moreover, since the charged scrap does not disturb the layer of coke or ore already charged, the distribution of coke and ore is not adversely affected, and the distribution control in the radial direction is facilitated.
【０００８】また、スクラップを装入装置の通路で詰ま
らない程度例えば３０ｍｍ超２００ｍｍ以下に整粒し、
中心部に装入すれば、分布に悪影響を与えないため、ス
クラップを鉱石と同様の粒度例えば、５ｍｍから３０ｍ
ｍの範囲に整粒する場合に比べて、スクラップの整粒費
用を大幅に削減できる。In addition, the scrap is sized to a size of, for example, more than 30 mm to 200 mm or less so as not to be clogged in the passage of the charging device.
Scraps have a particle size similar to that of ore, for example, 5 mm to 30 m, since they do not adversely affect the distribution if inserted in the center.
Compared with the case of sizing in the range of m, the sizing cost of scrap can be greatly reduced.
【０００９】本発明者の実験によればスクラップを装入
する中心部の範囲は炉口径の２分の１以内がよい。炉口
径の２分の１以内であればスクラップの粒度範囲を広げ
ても粒度偏析が炉全体に与える影響は少なく、且つスク
ラップの装入が既装入物の分布を殆ど崩さないためと考
えられる。According to an experiment conducted by the present inventor, it is preferable that the range of the center portion into which the scrap is charged is within one half of the furnace diameter. It is considered that the particle size segregation has little effect on the entire furnace even if the particle size range of the scrap is widened within a half of the furnace diameter, and the charging of the scrap hardly disturbs the distribution of the already charged material. .
【００１０】[0010]
【実施例】本発明の実施例について図面を参照しながら
詳細に説明する。図１は本発明の実施例であるが、スク
ラップは炉頂部装入物が形成する中心部の逆円錐状空間
７の一部又は全部を埋める形で装入されるが、スクラッ
プの装入量は中心部の逆円錐状空間７から溢れない量が
好ましい。図１は鉱石９とコークス８を順次層状に装入
した後、スクラップ１０を中心部に装入した例である。
図１では逆円錐径６が炉口径Ｄの２分の１で、傾斜角１
３は３０度であり、逆円錐状空間７の容積９．４５×１
０-3×Ｄ3 の４分の１を満たしている。炉口径Ｄが１０
ｍの例ではスクラップ１０の装入量はスクラップの嵩比
重を４．０とすると９．４５ｔ／バッチとなる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention. The scrap is charged so as to fill a part or all of an inverted conical space 7 in the center formed by the furnace top charge. Is preferably such that it does not overflow from the inverted conical space 7 at the center. FIG. 1 shows an example in which ore 9 and coke 8 are charged sequentially in layers, and then scrap 10 is charged in the center.
In FIG. 1, the inverted cone diameter 6 is one half of the furnace diameter D, and the inclination angle is 1
3 is 30 degrees and the volume of the inverted conical space 7 is 9.45 × 1
It satisfies a quarter of 0 −3 × D 3 . Furnace diameter D is 10
In the example of m, the charged amount of the scrap 10 is 9.45 t / batch when the bulk specific gravity of the scrap is 4.0.
【００１１】スクラップのサイズはスクラップ装入装置
３（入側は図示せず）の最小導水口径により規制され
る。スクラップ装入装置３のスクラップの通路の最小導
水口径の４分の１以下に整粒すればスクラップ装入装置
３内での詰まりを防止できる。例えば、スクラップ装入
装置３の最小導水口径が８００ｍｍの例ではスクラップ
最大粒度は２００ｍｍとなる。図１の実施例ではスクラ
ップ装入装置３は円筒パイプ状である。The size of the scrap is regulated by the minimum water inlet diameter of the scrap charging device 3 (the inlet side is not shown). Clogging in the scrap charging device 3 can be prevented by sizing the particle to less than one-fourth of the minimum water passage diameter of the scrap passage of the scrap charging device 3. For example, in a case where the minimum water inlet diameter of the scrap charging device 3 is 800 mm, the maximum scrap particle size is 200 mm. In the embodiment shown in FIG. 1, the scrap charging device 3 has a cylindrical pipe shape.
【００１２】スクラップを装入するタイミングは、コー
クス↓鉱石↓（コークス装入後に鉱石装入することを示
す）又は鉱石↓コークス↓をベースとするチャージのコ
ークス又は鉱石装入後に１バッチのスクラップを装入す
るチャージ、コークス及び鉱石装入各バッチ毎にそれぞ
れ１バッチのスクラップを装入するチャージ、これらの
チャージを連続的に行うパターン、ベースチャージの数
回に１回、又はそれ以上に長いサイクルでスクラップを
装入するチャージを挿入するパターンがある。ベースチ
ャージはコークス↓コークス↓鉱石↓鉱石↓、鉱石↓鉱
石↓コークス↓コークス↓等コークス及び鉱石の一方又
はそれぞれが複数のバッチよりなるチャージであっても
よい。The timing of charging the scrap is as follows: coke ↓ ore ↓ (indicating that ore is charged after charging coke) or charge coke based on ore ↓ coke ↓ or one batch of scrap after charging ore. Charge to charge, charge to charge one batch of scrap for each batch of coke and ore, pattern to continuously charge these charges, once every several times of base charge, or longer cycle There is a pattern to insert a charge for charging scraps. The base charge may be a charge consisting of a plurality of batches of coke and ore, such as coke ↓ coke ↓ ore ↓ ore ↓, ore ↓ ore ↓ coke ↓ coke ↓ and the like.
【００１３】[0013]
【発明の効果】コークスと鉱石の交互層状装入よりなる
各チャージ毎又は数チャージ毎に、コークス又は鉱石の
装入後あるいはコークス及び鉱石各バッチ装入後に、装
入装置の通路で詰まらない程度に整粒されたスクラップ
を炉口径の２分の１以内の中心部に装入することによ
り、スクラップ装入に伴うスクラップ整粒費用が軽減さ
れ、同時に、分布制御が容易となる。According to the present invention, for each charge or every several charges composed of alternate layered charging of coke and ore, after charging of coke or ore or after charging each batch of coke and ore, the extent to which the passage of the charging device is not clogged. By charging the sized scrap into the central part within one half of the furnace diameter, the cost of sizing the scrap accompanying the charging of the scrap is reduced, and at the same time, the distribution control becomes easy.
【図１】本発明の実施例を示す高炉炉口部の縦断面図FIG. 1 is a longitudinal sectional view of a blast furnace opening showing an embodiment of the present invention.
【図２】従来法の例を示す高炉炉口部の縦断面図FIG. 2 is a longitudinal sectional view of a blast furnace mouth showing an example of a conventional method.
１ 大ベル ２ ムーバブルアーマー ３ スクラップ装入装置 ４ 炉壁 ６ 逆円錐径 ７ 炉中心部逆円錐状空間 ８ コークス ９ 鉱石 １０ スクラップ １１ 鉱石とスクラップの混合物 １２ コークス層を削り込んで厚くなった鉱石とスクラ
ップの混合層 １３ 装入物の傾斜角 Ｄ 炉口径DESCRIPTION OF SYMBOLS 1 Large bell 2 Movable armor 3 Scrap charging device 4 Furnace wall 6 Inverted conical diameter 7 Inverted conical space in furnace center 8 Coke 9 Ore 10 Scrap 11 Mixture of ore and scrap 12 Ore thickened by cutting coke layer Mixed layer of scrap 13 Inclined angle of charge D Furnace diameter
Claims (1)
入する高炉でのスクラップ装入法において、鉱石又はコ
ークス装入後に炉口径の２分の１以内の中心部に３０ｍ
ｍ超〜２００ｍｍに整粒されたスクラップを装入するこ
とを特徴とする高炉におけるスクラップ装入法。In a scrap charging method in a blast furnace in which a part of ore is replaced with scrap and charged, 30 m is added to a central portion within a half of a furnace diameter after charging ore or coke.
A method for charging scrap in a blast furnace, which comprises charging scrap sized to more than m to 200 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6737493A JP2968410B2 (en) | 1993-03-04 | 1993-03-04 | Scrap charging method in blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6737493A JP2968410B2 (en) | 1993-03-04 | 1993-03-04 | Scrap charging method in blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06256819A JPH06256819A (en) | 1994-09-13 |
| JP2968410B2 true JP2968410B2 (en) | 1999-10-25 |
Family
ID=13343179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6737493A Expired - Lifetime JP2968410B2 (en) | 1993-03-04 | 1993-03-04 | Scrap charging method in blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2968410B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2792382B2 (en) * | 1993-03-25 | 1998-09-03 | 住友金属工業株式会社 | Blast furnace operation method |
-
1993
- 1993-03-04 JP JP6737493A patent/JP2968410B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06256819A (en) | 1994-09-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990727 |