JPH02115309A - Method for charging raw material of blast furnace - Google Patents
Method for charging raw material of blast furnaceInfo
- Publication number
- JPH02115309A JPH02115309A JP26792388A JP26792388A JPH02115309A JP H02115309 A JPH02115309 A JP H02115309A JP 26792388 A JP26792388 A JP 26792388A JP 26792388 A JP26792388 A JP 26792388A JP H02115309 A JPH02115309 A JP H02115309A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- coke
- raw material
- iron source
- charging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002994 raw material Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 100
- 239000000571 coke Substances 0.000 claims abstract description 50
- 229910052742 iron Inorganic materials 0.000 claims abstract description 50
- 239000000446 fuel Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000295 fuel oil Substances 0.000 claims description 3
- 239000010742 number 1 fuel oil Substances 0.000 claims 1
- 238000010030 laminating Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 23
- 239000012256 powdered iron Substances 0.000 description 8
- 239000003245 coal Substances 0.000 description 6
- 230000008021 deposition Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000007630 basic procedure Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、高炉羽口から補助燃料および粉鉄源を吹込
む高炉操業において、炉頂部における鉄源とコークスの
半径方向分布を高精度に制御することによって、炉況の
安定化をはかる高炉の原料装入方法に関する。[Detailed Description of the Invention] Industrial Field of Application This invention provides highly accurate control of the radial distribution of iron source and coke at the top of the furnace during blast furnace operation in which auxiliary fuel and powdered iron source are injected from the blast furnace tuyere. The present invention relates to a method for charging raw materials into a blast furnace, thereby stabilizing the furnace condition.
従来の技術
近年、高炉技術の発展により羽口から高炉内へ補助燃料
として重油が吹込まれるようになり、さらに最近のエネ
ルギー事情を反映して、経済的観点から重油に替えて安
価な微粉炭を１００Ｋｇ／ｐｔ以上使用する試みが盛ん
に行なわれ、高価なコークス使用量の低減がはかられて
いる。また安価原料として粉鉱石や高炉ダストなどの粉
鉄源を４０Ｋｌ／ｐｔ以上羽口から吹込みして高価な焼
結鉱使用量の低減がはかられている。Conventional technology In recent years, with the development of blast furnace technology, heavy oil has been injected into the blast furnace through the tuyere as an auxiliary fuel.Furthermore, reflecting the recent energy situation, cheap pulverized coal has been used instead of heavy oil from an economic point of view. Many attempts are being made to use 100 kg/pt or more of coke, and efforts are being made to reduce the amount of expensive coke used. In addition, an attempt is being made to reduce the amount of expensive sintered ore used by injecting 40 Kl/pt or more of powdered iron sources such as powdered ore and blast furnace dust through the tuyeres as inexpensive raw materials.
しかし、このような高炉羽口から補助燃料および粉鉄源
を多量に吹込む高炉操業においては、炉頂から装入する
鉄源／コークス重量比（ＪＸ下Ｏ／Ｃと略記する）が大
幅に増加し、半径方向Ｏ／Ｃ分布制御に支障をきたすと
いう問題が生じる。However, in such a blast furnace operation in which a large amount of auxiliary fuel and powdered iron source is injected from the blast furnace tuyere, the iron source/coke weight ratio (abbreviated as JX lower O/C) charged from the top of the furnace increases significantly. This causes a problem in that the radial O/C distribution control is hindered.
例えば、燃料比４８ＯＮｆｆ／ｐｔ 、羽口吹込微粉炭
比１００Ｎｆｆ／Ｅ）ｔの場合、炉頂装入ｏ／ｃは４．
２程度であるが、羽口吹込み微粉炭比を１５０Ｋｆｆ／
ｐｔに増加すると、炉頂装入Ｏ／Ｃは４．８程度にまで
上昇する。For example, when the fuel ratio is 48 ONff/pt and the tuyere-injected pulverized coal ratio is 100 Nff/E)t, the furnace top charging O/C is 4.
2, but the tuyere injection pulverized coal ratio is 150Kff/
pt, the top charging O/C rises to about 4.8.
この時、同時に羽口から粉鉄源を５０Ｋｇ／ｐｔを吹込
むと、炉頂装入Ｏ／Ｃは４．７程度に低下するものの、
依然として高レベルにある。At this time, if a powdered iron source of 50 kg/pt is injected from the tuyere at the same time, the top charging O/C will drop to about 4.7, but
remains at a high level.
また、炉頂装入Ｏ／Ｃ上昇時には半径方向Ｏ／Ｃ分布に
も大きな影響をおよぼし、炉況の安定化を妨げるという
問題がある。Furthermore, when the O/C at the top of the furnace rises, the radial O/C distribution is greatly affected, and there is a problem in that stabilization of the furnace condition is hindered.
第１の問題点は、高炉中心部Ｏ／Ｃの上昇と変動である
。The first problem is the rise and fluctuation of O/C in the center of the blast furnace.
すなわち、炉頂装入Ｏ／Ｃの上昇によって１回の炉内装
入鉄源量が増加し、中心部の鉄源層厚が増加する結果、
中心部Ｏ／Ｃが上昇する。また、鉄源装入時に鉄源のも
つ衝撃エネルギーによって堆積コークス層表層部の崩壊
が起り、この崩壊現象はコークス堆積角変動や鉄源粒度
構成変動によって変化し、コークス量の少ない中心部Ｏ
／Ｃを大きく変動させる。In other words, as the top charging O/C increases, the amount of iron source charged into the furnace at one time increases, and as a result, the thickness of the iron source layer in the center increases.
Center O/C rises. In addition, when the iron source is charged, the impact energy of the iron source causes collapse of the surface layer of the coke layer, and this collapse phenomenon changes depending on changes in the coke deposition angle and iron source particle size composition.
/C is greatly varied.
第２の問題点は、炉壁部Ｏ／Ｃの変動である。The second problem is the fluctuation of the furnace wall O/C.
すなわち、炉旧装入Ｏ／Ｃの上昇によって１回の炉内装
入鉄源量が増加しコークス層の崩壊が大きくなるが、同
時にその崩壊変動量も増加するため炉壁部Ｏ／Ｃが変動
する。その結果、炉内ガス流分布に変化をきたし、融着
帯形状が乱れてスリップ、棚吊り等の荷下がり異常が生
じ易くなる。第２図は炉頂装入Ｏ／Ｃとスリップ発生頻
度の関係を例示したもので、炉頂装入Ｏ／Ｃが４．５を
超えると急激にスリップが増加することがわかる。In other words, as the old furnace charging O/C rises, the amount of iron introduced into the furnace at one time increases and the collapse of the coke layer increases, but at the same time, the amount of fluctuation in the collapse also increases, so the O/C at the furnace wall changes. do. As a result, the gas flow distribution in the furnace changes, the shape of the cohesive zone is disturbed, and it becomes easy to cause unloading abnormalities such as slipping and hanging on a shelf. FIG. 2 illustrates the relationship between top charging O/C and slip occurrence frequency, and it can be seen that slip increases rapidly when top charging O/C exceeds 4.5.
発明が解決しようとする課題
この発明は前に述べたような実情よりみて、高炉羽目か
ら補助燃料および粉鉄源を多量に吹込むに際し、炉頂に
おける半径方向Ｏ／Ｃ分布の変動によって生じる通気性
の悪化、スリップや棚吊り等の異常現象が発生しないよ
うに、高精度の半径方向Ｏ／Ｃ分布制御を実現し得る原
料装入方法を提案しようとするものでおる。Problems to be Solved by the Invention In view of the above-mentioned actual circumstances, this invention solves the problem of aeration caused by fluctuations in the radial O/C distribution at the top of the furnace when a large amount of auxiliary fuel and powdered iron source is injected from the blast furnace bed. The purpose of this paper is to propose a raw material charging method that can realize highly accurate radial O/C distribution control to prevent abnormal phenomena such as deterioration of performance, slipping, and shelf hanging.
課題を解決するための手段
この発明は、高炉羽口から補助燃料および粉鉄源を多量
に吹込むことによって生じる炉頂装入Ｏ／Ｃ条件下にお
ける半径方向Ｏ／Ｃ分布に関する問題点を解決するため
、次のような対策を講じた。Means for Solving the Problems This invention solves the problem regarding radial O/C distribution under top charging O/C conditions caused by injecting a large amount of auxiliary fuel and powdered iron source from the blast furnace tuyeres. To this end, we have taken the following measures:
第１点は、中心部Ｏ／Ｃの上昇および変動対策として、
鉄源とコークスの混合原料を直接中心部に装入して中心
部のＯ／Ｃを制御するとともに、鉄源装入時のコークス
層崩壊の影響を回避する。The first point is to counter the rise and fluctuation of central O/C.
A mixed raw material of iron source and coke is directly charged into the center to control O/C in the center and avoid the influence of coke layer collapse when charging the iron source.
第２点は、炉壁部Ｏ／Ｃの変動対策として、鉄源とコー
クスを混合した原料を炉壁部に装入することによって、
鉄源装入時のコークス層崩壊の影響を回避する。The second point is that as a measure against fluctuations in O/C at the furnace wall, by charging a raw material containing a mixture of iron source and coke into the furnace wall,
Avoiding the effects of coke layer collapse during iron source charging.
すなわち、この発明に係る高炉原料装入方法は、鉄源と
コークスの層状装入に先だって、炉中心部と炉壁部に鉄
源とコークスの混合原料を装入する方法であり、また炉
中心部へは既設装入装置とは別のルートから鉄源とコー
クスの混合原料を装入し、また炉中心部と炉壁部へ同時
に鉄源とコークスの混合原料を装入する方法である。That is, the blast furnace raw material charging method according to the present invention is a method in which a mixed raw material of iron source and coke is charged into the furnace center and the furnace wall prior to layered charging of iron source and coke, and In this method, a mixed raw material of iron source and coke is charged into the furnace from a route different from the existing charging equipment, and a mixed raw material of iron source and coke is charged simultaneously into the furnace center and the furnace wall.
作 用
高炉中心部と炉壁部に鉄源とコークスの混合原料を装入
する方法をとったのは、以下に示す理由による。Function The method of charging a mixed raw material of iron source and coke into the center and wall of the blast furnace was adopted for the following reasons.
まず、高炉中心部に鉄源とコークスの混合原料を装入す
る方法をとったのは、高炉中心部Ｏ／Ｃの局所的制御を
容易にかつ的確に行なうためである。First, the method of charging a mixed raw material of iron source and coke into the center of the blast furnace was adopted in order to easily and accurately perform local control of O/C in the center of the blast furnace.
すなわち、高炉中心部に鉄源とコークスの層状装入を行
なえば、原料の嵩密度の変動、粒度構成の変動、中心部
ガス流速の変動等によって、中心部に装入された原料の
堆積範囲および堆積角の変動が避けられず、その結果、
高炉中心部のＯ／Ｃ制御が困難となり、この部分でガス
流量およびガス温度の変動が大きくなり、ガス利用率が
改善されず、高炉の燃料比を低下ざぜることか困難とな
る。In other words, if the iron source and coke are charged in layers at the center of the blast furnace, the accumulation range of the material charged in the center will change due to changes in the bulk density of the material, changes in particle size composition, changes in the gas flow rate in the center, etc. and variations in the deposition angle are inevitable, resulting in
O/C control in the central part of the blast furnace becomes difficult, and fluctuations in gas flow rate and gas temperature become large in this part, making it difficult to improve the gas utilization rate and lowering the fuel ratio of the blast furnace.
しかし、鉄源とコークスとを混合して高炉中心部に装入
すると、層状装入に起因する前記問題を解決でき、高炉
中心部のＯ／Ｃ制御が容易となる。However, if the iron source and coke are mixed and charged into the center of the blast furnace, the above-mentioned problem caused by stratified charging can be solved, and O/C control of the center of the blast furnace becomes easier.
また、この炉中心部への混合原料の装入を別ルートで行
なうことにより、既設装入装置による周辺部への原料装
入に対し独立的に行なわれることになるので、高炉中心
部に的確にＯ／Ｃを付与できる。したがって、この発明
では高炉中心部への鉄源とコークスの混合原料の装入は
、既設装入装置とは別のルートより行なうこととしたの
でおる。In addition, by charging the mixed raw material into the center of the blast furnace using a different route, it will be possible to charge the mixed raw material into the center of the blast furnace independently of the charging of the raw material into the surrounding area by the existing charging equipment, so that it will be possible to charge the mixed raw material into the center of the blast furnace accurately. can be given O/C. Therefore, in this invention, the mixed raw material of iron source and coke is charged into the center of the blast furnace through a route different from that of the existing charging device.
次に、高炉炉壁部に鉄源とコークスの混合原料を装入す
る方法をとったのは、高炉炉壁部Ｏ／Ｃの局所的制御を
容易にかつ的確に行なうためである。Next, the method of charging the mixed raw material of iron source and coke into the blast furnace wall was adopted in order to easily and accurately perform local control of the blast furnace wall O/C.
すなわち、高炉炉壁部においても、鉄源とコークスを層
状に装入すると、前記炉中心部の場合と同様、炉壁部の
Ｏ／Ｃ制御が困難となり、この部分でガス流量およびガ
ス温度の変動が大きくなる。In other words, if the iron source and coke are charged in layers at the blast furnace wall, as in the case of the furnace center, O/C control of the furnace wall becomes difficult, and the gas flow rate and gas temperature are Fluctuations increase.
しかし、鉄源とコークスを混合して装入すると、この部
分における原料の堆積範囲や堆積角の変動が避けられ、
その結果、炉壁部のＯ／Ｃ制御が容易となる。なお、炉
壁部への混合原料の装入は、既設装入装置を用いて行な
うことができる。However, if the iron source and coke are mixed and charged, fluctuations in the deposition range and deposition angle of the raw materials in this area can be avoided, and
As a result, O/C control of the furnace wall becomes easy. Note that the mixed raw materials can be charged into the furnace wall using an existing charging device.
また、この発明において、高炉中心部と炉壁部への鉄源
とコークスの混合原料の装入を、通常の鉄源とコークス
の層状装入に先だって行なうこととしたのは、いわゆる
中間部に層状装入される鉄源装入によって起るコークス
層の崩壊を最小限にとどめ、コークス層崩壊による炉中
心部および炉壁部のＯ／Ｃ変動を回避するためである。In addition, in this invention, the mixed raw material of iron source and coke is charged into the central part and the furnace wall part of the blast furnace prior to the usual layered charging of iron source and coke. This is to minimize the collapse of the coke layer caused by the iron source charging in layers and to avoid O/C fluctuations in the furnace center and furnace wall due to the coke layer collapse.
実 施 例
第１図はこの発明の一実施例を示すもので、ベル・アー
マ式装入装置を備えた高炉にこの発明を適用する場合の
模式図である。Embodiment FIG. 1 shows an embodiment of the present invention, and is a schematic diagram when the present invention is applied to a blast furnace equipped with a bell armor type charging device.
高炉（１）の炉頂部には既設のベル式装入装置（２）お
よびムーバブルアーマ（１２）とは別に、炉壁を貫通し
先端部が高炉中心部に望む装入シュート（３）が付設さ
れる。（４）は鉄源とコークスの混合原料の貯蔵ホッパ
ーである。At the top of the blast furnace (1), in addition to the existing bell-type charging device (2) and movable armor (12), there is a charging chute (3) that penetrates the furnace wall and whose tip is in the center of the blast furnace. be done. (4) is a storage hopper for mixed raw materials of iron source and coke.
第１図の場合、炉頂からベル式装入装置（２）にて鉄源
（５）とコークス（６）とを炉内に層状装入するに先だ
って、鉄源（５）とコークス（６）を所定の比率で混合
した混合原料（７）を該貯蔵ホッパー（４）より装入シ
ュート（３）を介して炉中心部に直接装入し、炉中心部
に混合原料層Ａを形成する。In the case of Fig. 1, the iron source (5) and coke (6) are charged in layers into the furnace from the top of the furnace using the bell-type charging device (2). ) in a predetermined ratio is directly charged into the center of the furnace from the storage hopper (4) through the charging chute (3) to form a mixed material layer A in the center of the furnace. .
次に、上記と同じ鉄源とコークスを所定比率で混合した
混合原料（７）を既設のベル式装入装置（２）にて炉壁
部に装入し、炉壁部に混合原料層Ｂを形成する。Next, the mixed raw material (7), which is a mixture of the same iron source and coke as described above at a predetermined ratio, is charged into the furnace wall using the existing bell-type charging device (2), and the mixed raw material layer B is placed on the furnace wall. form.
そして最後に、炉中心部の混合原料層Ａと炉壁部の混合
原料層Ｂとの間、すなわち炉中間部に鉄源（５）とコー
クス（６）をベル式装入装置（２）により層状装入し、
炉中間部に鉄源層とコークス層とからなる層状原料層Ｃ
を形成し、１単位の原料装入を完了する。以後、この１
単位の原料装入を繰返し行なう。Finally, iron source (5) and coke (6) are placed between the mixed raw material layer A in the center of the furnace and the mixed raw material layer B in the furnace wall, that is, in the middle of the furnace, using the bell-type charging device (2). layered charging;
A layered raw material layer C consisting of an iron source layer and a coke layer is located in the middle of the furnace.
and completes one unit of raw material charging. From now on, this 1
Unit raw material charging is repeated.
この発明においては、炉中心部と炉壁部への混合原料（
７）の装入はそれぞ独立して行なうことができるので、
炉中心部および炉壁部へは混合原料を同時に装入するこ
とができる。In this invention, the mixed raw material (
Since charging in 7) can be done independently,
Mixed raw materials can be charged into the furnace center and the furnace wall at the same time.
また、炉中間部に装入される鉄源（５）とコークス（６
）の炉内装入順序は、特に限定されない。In addition, iron source (5) and coke (6) are charged into the middle part of the furnace.
) are not particularly limited in the order in which they are introduced into the furnace.
混合原料（７）における鉄源とコークスの混合比率は、
所望の中心部Ｏ／Ｃと同一になるように調整する。The mixing ratio of iron source and coke in mixed raw material (7) is:
Adjust so that it is the same as the desired center O/C.
なお、ベルレス式高炉にこの発明を適用する場合も基本
的な手順は、上記ベル式高炉の場合と同様である。Note that when the present invention is applied to a bell-less type blast furnace, the basic procedure is the same as in the case of the above-mentioned bell type blast furnace.
次に、ベル・アーマ式装入装置を備えた内容積２７００
ｍ’の高炉にこの発明方法を適用した場合の実施結果を
第１表に示す。Next, the internal volume 2700 equipped with Bell Armor type charging device
Table 1 shows the results obtained when the method of this invention was applied to a blast furnace of m'.
本実施例では、羽口から微粉炭を約１００ｆｆｙ／ｐｔ
吹込む操業をベースとした。In this example, approximately 100ffy/pt of pulverized coal was supplied from the tuyere.
It was based on an injecting operation.
従来法■では、微粉炭吹込量を約１５０Ｋｇ／ｐｔに増
加するとともに、羽口から粉鉄源としてペレットフィー
ドを１１００Ｎ／ｐｔ吹込んだ。その結果、炉頂装入Ｏ
／Ｃが４．５８に上昇し、中心部Ｏ／Ｃが増加し、中心
部融着帯高さは１０．６ｍに低下した。このため、スリ
ップ頻度が増加し、溶銑温度のバラツキ（σＴｐｉＯ）
も大きくなった。In conventional method (2), the amount of pulverized coal injected was increased to about 150 Kg/pt, and 1100 N/pt of pellet feed was injected from the tuyeres as a source of powdered iron. As a result, top charging O
/C increased to 4.58, center O/C increased, and center cohesive zone height decreased to 10.6 m. For this reason, the slip frequency increases and the variation in hot metal temperature (σTpiO)
has also grown larger.
従来法■では、微粉炭比を約２００υ／ｐｔまで増加し
、粉鉄源も同時に１００／ｌ’ｇ／ｌ）を吹込んだ。そ
の結果、炉頂装入Ｏ／Ｃは５．２１まで増加し、中心部
融着帯高さは大幅に低下し、スリップ頻度は顕著に増加
し、σＴｐｉｇは１０度を超えた。In conventional method (2), the pulverized coal ratio was increased to about 200 υ/pt, and the powdered iron source (100/l'g/l) was injected at the same time. As a result, the top charging O/C increased to 5.21, the central cohesive zone height decreased significantly, the slip frequency increased significantly, and σTpig exceeded 10 degrees.
これに対し、高炉中心部に別ルートで混合原料を装入し
、ざらに炉壁部に通常ルートで混合原料を装入した本発
明法ＩＶ、Ｖでは、鉄源／コークス比を装入Ｏ／Ｃで除
した相対Ｏ／Ｃがベース操業とほぼ同一になるように設
定（＝ ０．７２）Ｌ／、コークス量を１６５トンとし
て鉄源装入邑を決定した。On the other hand, in methods IV and V of the present invention, in which the mixed raw material is charged into the center of the blast furnace through a separate route, and the mixed raw material is charged into the furnace wall through the normal route, the iron source/coke ratio is The iron source charging station was determined so that the relative O/C divided by /C was set to be almost the same as in the base operation (= 0.72) L/, and the amount of coke was 165 tons.
また、炉壁部の相対Ｏ／Ｃはベース操業とほぼ同一の１
．０６になるよう設定した。In addition, the relative O/C of the furnace wall was 1, which was almost the same as the base operation.
．． I set it to be 06.
これにより、半径方向Ｏ／Ｃ分布を適正に制御できた結
果、融着帯形状も適正化し、スリップ頻度、溶銑温度バ
ラツキも大幅に抑制できた。As a result, the radial O/C distribution could be appropriately controlled, the cohesive zone shape could also be optimized, and slip frequency and hot metal temperature variations could also be significantly suppressed.
以下余白
発明の詳細
な説明したごとく、この発明方法によれば、高炉中心部
と炉壁部にそれぞれ鉄源とコークスの混合原料層を形成
し、炉中間部に鉄源とコークスの層状原料層を形成する
ことができるので、炉中心部および炉壁部に対して的確
にＯ／Ｃを付与することができ、羽口から補助燃料を多
量に吹込む場合の炉頂装入Ｏ／Ｃ増加に起因する半径方
向Ｏ／Ｃ分布の変動を防止できる結果、融着帯形状の適
正化、スリップ頻度および溶銑温度バラツキの減少がは
かられ、高炉操業の安定化に大なる効果を奏するもので
ある。As described in detail below, according to the method of the present invention, a mixed raw material layer of iron source and coke is formed in the central part of the blast furnace and the furnace wall, respectively, and a layered raw material layer of iron source and coke is formed in the middle part of the furnace. As a result, O/C can be applied accurately to the furnace center and the furnace wall, and the O/C at the top of the furnace can be increased when a large amount of auxiliary fuel is injected from the tuyere. As a result of being able to prevent fluctuations in the radial O/C distribution caused by be.
第１図はこの発明の一実施例を示す模式図、第２図は羽
口から多量の補助燃料を吹込む操業における炉頂装入Ｏ
／Ｃとスリップ頻度の関係を例示した図である。
１・・・高炉 ２・・・ベル式装入装置
３・・・装入シュート ５・・・鉄源６・・・コ
ークス ７・・・混合原料＾・・・炉中心部
の混合原料層
Ｂ・・・炉壁部の混合原料層
Ｃ・・・炉中間部の層状原料層
第２図
炉頂装入もｔFig. 1 is a schematic diagram showing one embodiment of the present invention, and Fig. 2 is a top charging O during operation in which a large amount of auxiliary fuel is injected from the tuyere.
It is a figure which illustrated the relationship between /C and slip frequency. 1...Blast furnace 2...Bell type charging device 3...Charging chute 5...Iron source 6...Coke 7...Mixed raw material^...Mixed raw material layer B in the center of the furnace ...Mixed raw material layer C in the furnace wall part...Layered raw material layer in the middle part of the furnace Fig. 2 Furnace top charging also t
Claims (1)
ｐｔ以上吹込む高炉操業において、炉頂より鉄源および
コークスを層状装入するに先だつて、鉄源とコークスの
混合原料を炉中心部と炉壁部に装入することを特徴とす
る高炉の原料装入方法。 ２ 鉄源とコークスの混合原料を、既設装入装置によらずに
別ルートで炉中心部に装入することを特徴とする請求項
１に記載の高炉の原料装入方法。 ３ 炉中心部と炉壁部に同時に、鉄源とコークスの混合原料
を装入することを特徴とする請求項１に記載の高炉の原
料装入方法。[Claims] 1. Auxiliary fuel such as pulverized coal and heavy oil is transferred from the blast furnace tuyere to 100 kg/
A blast furnace characterized in that, in a blast furnace operation in which PT or more is injected, a mixed raw material of iron source and coke is charged into the furnace center and the furnace wall before the iron source and coke are charged in layers from the top of the furnace. Raw material charging method. 2. The method for charging materials into a blast furnace according to claim 1, characterized in that the mixed raw material of iron source and coke is charged into the center of the furnace through a separate route without using an existing charging device. 3. The method for charging materials into a blast furnace according to claim 1, characterized in that a mixed raw material of iron source and coke is charged into the furnace center and the furnace wall at the same time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26792388A JPH02115309A (en) | 1988-10-24 | 1988-10-24 | Method for charging raw material of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26792388A JPH02115309A (en) | 1988-10-24 | 1988-10-24 | Method for charging raw material of blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02115309A true JPH02115309A (en) | 1990-04-27 |
Family
ID=17451494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26792388A Pending JPH02115309A (en) | 1988-10-24 | 1988-10-24 | Method for charging raw material of blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02115309A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002027043A1 (en) * | 2000-09-22 | 2002-04-04 | Voest-Alpine Industrieanlagenbau Gmbh & Co | Method and device for producing a static bed |
| WO2005123896A3 (en) * | 2004-06-12 | 2007-11-08 | Iron Mount Corp | Method and apparatus for carrying out a metallurgical process |
| JP2015178660A (en) * | 2014-03-19 | 2015-10-08 | 株式会社神戸製鋼所 | Method of charging raw material for blast furnace |
-
1988
- 1988-10-24 JP JP26792388A patent/JPH02115309A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002027043A1 (en) * | 2000-09-22 | 2002-04-04 | Voest-Alpine Industrieanlagenbau Gmbh & Co | Method and device for producing a static bed |
| US7470310B2 (en) | 2000-09-22 | 2008-12-30 | Voest-Alpine Industrieanlagenbau Gmbh & Co. | Method and device for producing a static bed |
| WO2005123896A3 (en) * | 2004-06-12 | 2007-11-08 | Iron Mount Corp | Method and apparatus for carrying out a metallurgical process |
| US7674315B2 (en) | 2004-06-12 | 2010-03-09 | Iron Mount Corporation | Method and apparatus for carrying out a metallurgical process |
| JP2015178660A (en) * | 2014-03-19 | 2015-10-08 | 株式会社神戸製鋼所 | Method of charging raw material for blast furnace |
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