JPS61127805A - Method and device for spout refining of molten iron from blast furnace - Google Patents

Method and device for spout refining of molten iron from blast furnace

Info

Publication number
JPS61127805A
JPS61127805A JP24908184A JP24908184A JPS61127805A JP S61127805 A JPS61127805 A JP S61127805A JP 24908184 A JP24908184 A JP 24908184A JP 24908184 A JP24908184 A JP 24908184A JP S61127805 A JPS61127805 A JP S61127805A
Authority
JP
Japan
Prior art keywords
hot metal
refining
gutter
blast furnace
guide path
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
JP24908184A
Other languages
Japanese (ja)
Inventor
Minoru Wada
実 和田
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 JP24908184A priority Critical patent/JPS61127805A/en
Publication of JPS61127805A publication Critical patent/JPS61127805A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00Refining of pig-iron; Cast iron

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PURPOSE:To assure substantial residence time and to permit the easy addition of a refining agent and the sepn. of formed slag by guiding first downward the molten iron flowing on a spout then guiding upward the molten iron. CONSTITUTION:The molten iron fed from a receiving part 2 in an arrow direction is subjected to slag cutting by a skimmer 6 and arrives at a channel bottom 8 after the flow thereof is made downward by a downward guide path 7. The flow direction of the molten iron is then changed to the upward flow by a guide path 9 at the channel bottom and the molten iron is fed to a pouring part 3 after slag cutting in an upward outflow guide path 10. Nozzle ports 12, 13 for blowing the refining agent together with a carrier gas are provided to an immersion block 11. The nozzle port 12 blows said agent to the path 7 and the port 13 to the path 10.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、高炉から流出した溶銑を樋内を流している間
に精錬するいわゆる樋精錬方法および装置、特に脱硫、
脱珪あるいは脱燐等の予備処理を効果的に行い得るよう
にした高炉の樋精錬方法および装置に関する。
Detailed Description of the Invention (Industrial Application Field) The present invention relates to a so-called gutter refining method and apparatus for refining hot metal flowing out of a blast furnace while flowing through the gutter, and in particular to a method and apparatus for refining hot metal flowing out from a blast furnace.
The present invention relates to a blast furnace gutter refining method and apparatus that enable preliminary treatments such as desiliconization and dephosphorization to be effectively performed.

(従来の技術) 従来、高炉等からの溶銑を別の容器に移すためには樋上
を流すことが行われている。溶銑が樋上を流れる期間中
はいわゆる「あき時間」であるが、この期間を利用して
予備精錬を行うことが樋精錬方法として提案され、一部
試みられている。しかしながら、その期間中に樋内で精
錬を行おうとする場合、精錬反応を進めるにはある長さ
の時間が必要であるため、したがって流速が一定ならば
樋の長さを長くしなければ精錬反応を完結させるまでの
所要滞在時間を確保することはできない。
(Prior Art) Conventionally, in order to transfer hot metal from a blast furnace or the like to another container, it has been carried out by flowing it over a gutter. The period during which hot metal flows over the gutter is a so-called "idle time," and using this period to carry out preliminary refining has been proposed as a gutter refining method, and some attempts have been made. However, if smelting is to be carried out in the gutter during that period, a certain length of time is required for the smelting reaction to proceed. It is not possible to secure the required staying time to complete the project.

しかしながら、本来、樋の長さは可及的に短いのが望ま
れていたのであって、これまでの高炉装置の設計例から
みてもこれを上述のように精錬反応が完結するまでの所
要長さにまで延長することは現実的には不可能といわな
ければならない。そのため従来より提案されているもの
には、流速を落とすこと、つまり樋の適宜箇所に溶銑の
溜めを設けておいて、そこに滞在する溶銑に脱硫剤等の
精錬剤を吹込んでいるのである。例えば特開昭50−3
3112号には湯溜り部を設け、そこに滞在している溶
湯に対し不活性ガスとともに精錬剤を吹き込むのである
。しかし、湯の深さが余り深くないことから精錬剤と湯
の接触時間を大きくとれないため、反応の早い精錬剤(
マグネシウムまたはマグネシウム合金)を使う必要があ
り、またそのような精錬剤を使ったとしてもどうしても
接触時間が短いことから反応効率も低いという問題があ
った。
However, originally it was desired that the length of the gutter be as short as possible, and from the design examples of conventional blast furnace equipment, this is the length required to complete the refining reaction as described above. It must be said that it is realistically impossible to extend this to that extent. For this reason, conventional proposals have been to reduce the flow rate, that is, to provide hot metal reservoirs at appropriate locations in the gutter, and to inject refining agents such as desulfurization agents into the hot metal staying there. For example, JP-A-50-3
No. 3112 is equipped with a sump section, and a refining agent is blown into the molten metal staying there along with an inert gas. However, since the depth of the hot water is not very deep, it is not possible to ensure a long contact time between the refining agent and the hot water.
However, even if such a refining agent were used, the reaction efficiency would be low due to the short contact time.

一方、特開昭54−6806号には、同じ< t11精
錬方法として樋上に減圧槽を設け、この減圧槽内に上向
きの溶銑流を形成するとともに、これに対し順流方向に
酸素を吹き込む精錬法が開示されている。
On the other hand, JP-A No. 54-6806 discloses a refining method in which a decompression tank is provided above the gutter, an upward flow of hot metal is formed in the depressurization tank, and oxygen is blown into the flow in the downstream direction as the same < t11 refining method. is disclosed.

しかし、これは真空精錬処理の1種であるRH法を高炉
からの溶銑に適用したものであって、真空設備を要する
ことからも高価な処理法となってしまう。また、真空下
での精錬では脱珪反応効率が低いことも問題である。
However, this method applies the RH method, which is a type of vacuum refining treatment, to hot metal from a blast furnace, and it is an expensive treatment method because it requires vacuum equipment. Another problem is that the desiliconization reaction efficiency is low in refining under vacuum.

特開昭52−136820号には、複数の横長炉を並列
に並べて各炉内を順次流れる溶湯がジグザグに進むよう
に構成した連続精錬装置が開示されている。
JP-A-52-136820 discloses a continuous refining apparatus in which a plurality of oblong furnaces are arranged in parallel so that the molten metal sequentially flows through each furnace in a zigzag pattern.

この方式は前述のような分類によれば、流路を区くする
ことによって滞在時間を長くしようとするものであ為。
According to the classification mentioned above, this method attempts to lengthen the residence time by dividing the flow path.

しかしながら、高炉の鋳床のように水平方向に狭いスペ
ースしか利用できない場合、このような水平方向に大き
な設備は不向きである。
However, such horizontally large equipment is not suitable when only a narrow horizontal space is available, such as in a blast furnace casting bed.

(発明が解決すべき問題点) 上述のようにいくつかの方式がすでに提案されているが
、いずれもまず十分な滞在時間をとることができなだめ
、十分な精錬反応を行うことができない。次に、滞在時
間を十分にとったとしても今度は精錬剤の添加が効果的
に行えず、また攪拌機構、さらには生成スラグの分離装
置の設置が困難であったりする。
(Problems to be Solved by the Invention) As mentioned above, several methods have already been proposed, but none of them allow sufficient residence time to be calmed and to perform a sufficient refining reaction. Next, even if the residence time is sufficient, the refining agent cannot be added effectively, and it may be difficult to install a stirring mechanism or a separation device for the produced slag.

(問題点を解決するための手段) かくして、本発明の目的は、上述の如き従来技術の欠点
を解消した、十分な滞在時間を確保するとともに精錬剤
の添加ならびに生成スラグの分離が容易に行ない得る、
高炉から流出した溶銑の樋精錬装置およびその方法を提
供することにある。
(Means for Solving the Problems) Thus, an object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, to ensure sufficient residence time, and to facilitate addition of refining agents and separation of produced slag. obtain,
An object of the present invention is to provide a gutter refining device for hot metal flowing out of a blast furnace and a method thereof.

ここに、本発明者らはかかる目的達成のため種々検討、
実験を重ねたところ、溶銑流出用の樋は通常混銑車の注
入口より高い位置に設けられており、この樋の位置と地
上面との垂直距離は何ら利用されていない空間であるこ
とに着目し、これを利用して樋上の滞在時間延長の方策
を求めて更に検討を続けたところ、いわば垂直型流路方
式とすることにより滞在時間の確保が図れるとともに、
精錬剤の添加さらには生成スラグの分離回収が著しく容
易に行い得ることを知り、本発明を完成した。
Here, the present inventors have conducted various studies to achieve this objective.
After repeated experiments, we realized that the gutter for hot metal outflow is usually installed at a higher position than the injection port of the pig iron mixing car, and that the vertical distance between the gutter's position and the ground surface is an unused space. However, we continued to consider ways to extend the residence time on the gutter by utilizing this, and found that by adopting a so-called vertical flow path system, we were able to secure the residence time.
The present invention was completed based on the knowledge that addition of a refining agent and separation and recovery of the produced slag can be performed extremely easily.

よって、本発明の要旨とするところは、高炉から流出し
た溶銑を樋に案内して別の容器に移す期間中に咳溶銑の
精錬を行うri1楕錬精錬において、樋上を流れる溶銑
を先ず下向きに案内し、次いで上向きに案内することを
特徴とする、高炉からの溶銑の樋精錬方法である。
Therefore, the gist of the present invention is that in ri1 elliptical refining, in which hot metal flowing out of a blast furnace is guided into a gutter and refined during the period when it is transferred to another container, the hot metal flowing on the gutter is first directed downward. This is a gutter refining method for hot metal from a blast furnace, which is characterized by guiding and then guiding upward.

なお、下向きに流れる溶銑に対し向流で精錬剤、例えば
脱硫剤を添加し、生成した精錬スラグを溶銑内に上方向
に浮上させて分離してもよく、あるいはさらに、上向き
に流れる溶銑に対し順流で精錬剤、例えば脱珪剤を添加
し、生成した精錬スラグを溶銑とともに上方向に流出さ
せてもよい。
Note that a refining agent, such as a desulfurization agent, may be added in countercurrent to the downwardly flowing hot metal, and the generated refining slag may be floated upward in the hot metal to separate it. A refining agent, such as a desiliconizing agent, may be added in the downstream direction, and the generated refining slag may be caused to flow upward together with the hot metal.

本発明はその別の特徴によれば、その要旨とするところ
は、 高炉から流出する溶銑を受ける受銑部;精錬済みの溶銑
を他の容器に注出する注銑部;上記受銑部と注銑部とを
接続する溝状の橋部;および 該樋部の適宜箇所に設けた、縦溝状の湯溜め部、から構
成され、前記湯溜め部には溶銑流の上流側から溶銑の下
方流入案内路そして溝底部案内路を経て続いて上方流出
案内路が設けられていることを特徴とする、高炉からの
溶銑の樋精錬装置である。
According to another feature of the present invention, the gist thereof is as follows: A pig iron receiving part that receives hot metal flowing out from a blast furnace; A pouring part that pours out refined hot metal into another container; It consists of a groove-shaped bridge section that connects the hot metal pouring section; and a vertical groove-shaped sump section provided at an appropriate location in the gutter section, into which hot metal is poured from the upstream side of the hot metal flow. This gutter refining device for hot metal from a blast furnace is characterized in that an upper outflow guideway is provided following a lower inflow guideway and a groove bottom guideway.

上記の下方流入案内路、溝底部案内路および上方流出案
内路を構成するには前記湯溜め部の内側領域に必要によ
り精錬剤吹込みノズルを上記の下方および上方の2つの
案内路側にそれぞれ設けた浸漬ブロックを挿入し、湯溜
め部内の溶銑に浸漬させてもよい。湯溜め部と浸漬ブロ
ックとの幅寸法を実質上等しくすることにより下方流入
案内路から溝底部案内路を経て上方流出案内路へ向かう
連続流が確保される。
In order to configure the above-mentioned lower inflow guideway, groove bottom guideway and upper outflow guideway, refining agent injection nozzles are provided on the lower and upper two guideway sides, respectively, in the inner region of the sump, if necessary. A immersion block may be inserted and immersed in the hot metal in the sump. By making the width dimensions of the sump and the immersion block substantially equal, continuous flow is ensured from the lower inflow guideway through the groove bottom guideway to the upper outflow guideway.

このように、本発明によれば、溶銑の自然な流れによる
上下流を利用して、該上下流中に精錬剤を向流および/
または順流で添加するものであり、かかる上下流を充分
長くとることによって、精錬剤と溶銑との十分な接触時
間を確保すると共に、スラグ分離も容易に行い得るので
ある。
As described above, according to the present invention, by utilizing the upstream and downstream of the natural flow of hot metal, the refining agent is introduced countercurrently and/or during the upstream and downstream of the hot metal.
Alternatively, by making the upstream and downstream sides sufficiently long, sufficient contact time between the refining agent and the hot metal can be ensured, and slag separation can be easily performed.

(作用) 添付図面は、本発明に係る樋精錬装置の略式斜視図であ
り、この樋精錬装置1は受銑部2、注銑部3、それらの
間を接続する槌部4および縦溝状の湯溜め部5から構成
される。受銑部2から矢印で示すように送給される溶銑
はスキンマー6によってスラグ切りが行われてから上記
湯溜め部5に送られる。このとき溶銑はまず下方流入案
内路7を経て下向きの流れとして送られ、次いで溝底部
8に到達する。このとき溝底部案内路9を経てから溶銑
は流れ方向を反転させて上向きの流れとなって上方流出
案内路10を経て、スラグ切りをしてから注銑部3に送
られる。
(Function) The attached drawing is a schematic perspective view of a gutter refining device according to the present invention. It consists of a hot water reservoir section 5. Hot metal fed from the pig iron receiving section 2 as shown by the arrow is slag-cut by a skimmer 6 and then sent to the sump section 5. At this time, the hot metal is first sent as a downward flow through the downward inflow guide path 7, and then reaches the groove bottom 8. At this time, after passing through the groove bottom guide path 9, the flow direction of the hot metal is reversed so that it flows upward, passes through the upper outflow guide path 10, and is sent to the pig iron pouring section 3 after being slag-cut.

湯溜め部5の内側領域には浸漬ブロック11が配置され
、この湯溜め部の内壁と4:漬ブロック11との間には
上記のように下方流入案内路7、溝底部案内路9および
上方流出案内路10が順次形成されている。
An immersion block 11 is arranged in the inner region of the sump 5, and between the inner wall of the sump 5 and the immersion block 11 are the lower inflow guide path 7, the groove bottom guide path 9, and the upper Outflow guide paths 10 are formed in sequence.

浸漬ブロック11には精錬剤をキャリアガスとともに溶
銑中に吹き込む手段が設けられている。図示例にあって
は前記下方流入案内路7の側にはArなどの不活性ガス
とともに脱硫剤を吹込むノズル口12がいくつか設けら
れており、一方上方流出案内路9の側には同じく脱珪剤
を吹込むノズル口13が設けられている。浸漬ブロック
11を構成する精錬剤吹込み部14は、図示例のように
上部よりの差し込み壁面方式が好ましく、未出銑時は、
ノズル部が場面より上となるように引き上げておく。あ
るいは浸漬ブロック全体を引き上げてもよい。
The immersion block 11 is provided with means for blowing a refining agent together with a carrier gas into the hot metal. In the illustrated example, several nozzle ports 12 are provided on the side of the downward inflow guide path 7 for blowing the desulfurizing agent together with an inert gas such as Ar, while on the side of the upward outflow guide path 9 there are also provided nozzle ports 12. A nozzle port 13 for blowing the desiliconizing agent is provided. The refining agent injection part 14 constituting the immersion block 11 preferably has a wall surface type inserted from the upper side as shown in the illustrated example, and when the iron is not tapped,
Pull it up so that the nozzle part is above the scene. Alternatively, the entire immersion block may be pulled up.

このように、湯溜め部5に下方流入案内路7および上方
流出案内10を設けるには浸漬ブロック11を設けるの
が簡便な手段である。
As described above, providing the immersion block 11 is a simple means for providing the lower inflow guide path 7 and the upper outflow guide 10 in the sump portion 5.

湯溜め部の断面形状は図示例のように底部に水平流れ部
を設けたU字形のものが好ましいが、これを1字形に構
成することも可能であり、具体的には当業者には多くの
変更例が考えられる。
The cross-sectional shape of the sump is preferably U-shaped with a horizontal flow section at the bottom as shown in the figure, but it is also possible to configure it into a single-shape. Examples of changes are possible.

以上のように、本発明は、もともと注銑部から地表面ま
での間にある落差(垂直間隔)を利用するものであり、
これにより樋の流路を長くとることができるため極めて
狭い設面スペースでかなり長い樋長さをとることが可能
となり、このため既存の狭い鋳床の設備にも設置可能で
ある。
As described above, the present invention originally utilizes the head (vertical distance) between the pouring part and the ground surface.
This makes it possible to lengthen the flow path of the gutter, making it possible to have a fairly long gutter length in an extremely narrow installation space, and therefore it can be installed in equipment with existing narrow casting beds.

さらに加えて、本発明によれば縦溝部の底部を境に向流
および順流の2種の関係で精錬剤を添加できるから、こ
の両者の違いを巧みに利用することによってすぐれた精
錬効果を得ることができる。
In addition, according to the present invention, the refining agent can be added in two ways, countercurrent and forward flow, with the bottom of the vertical groove as a boundary, and by skillfully utilizing the difference between the two, an excellent refining effect can be obtained. be able to.

例えば、向流で脱硫剤を添加する場合、精錬剤は上方に
浮上するため溶銑と向流接触になり、精錬効果が増すば
かりでなくスラグを下方流入案内路の頂部、つまり人口
部分で分離できる。
For example, when adding a desulfurization agent in a countercurrent flow, the refining agent floats upward and comes into countercurrent contact with the hot metal, which not only increases the refining effect but also allows the slag to be separated at the top of the downward inflow guide path, that is, at the artificial part. .

このとき精錬剤の吹込位置を上にしたりして生成スラグ
との速やかな分離を計るか、溶銑の下方流れ速さを生成
スラグの浮上速度以下にする必要がある。生成スラグを
分離する必要がない場合にはそれらについては特に制限
はない。
At this time, it is necessary to either raise the injection position of the refining agent to ensure rapid separation from the generated slag, or to lower the downward flow speed of the hot metal to less than the floating speed of the generated slag. If there is no need to separate the generated slag, there are no particular restrictions on them.

一方、順流で精錬剤を添加する場合、向流にはならない
が、前述の場合と違う精錬剤を吹き込むことにより、そ
れぞれ別個の2つの精錬機能を果たすことができる。
On the other hand, when adding a refining agent in the forward flow, although it does not result in countercurrent flow, by injecting a different refining agent from that in the above case, two separate refining functions can be performed.

以上説明したごと(本発明は精錬上の観点からも極めて
多くの効果をもたらすのである。
As explained above, the present invention brings about many effects from the viewpoint of refining.

次に実施例によって本発明をさらに説明する。Next, the present invention will be further explained by examples.

実施例 添付図面に斜視図で示す装置を使って第1表に示す組成
の溶銑に対し、本発明の樋槓錬法を実施した。溶銑流量
は10トン/分であった。
EXAMPLES The gutter smelting method of the present invention was carried out on hot metal having the composition shown in Table 1 using the apparatus shown in the perspective view in the attached drawings. The hot metal flow rate was 10 tons/min.

槌部の幅は700mm 、湯溜め部の深さは7m、浸漬
ブロックの浸漬深さは6m、下方流入案内路および上方
流出案内路の横断面形状は1mmマフ01であった。
The width of the hammer part was 700 mm, the depth of the sump part was 7 m, the immersion depth of the immersion block was 6 m, and the cross-sectional shape of the lower inflow guide path and the upper outflow guide path was 1 mm muff 01.

本例の場合、浸漬ブロック11の壁面に設けたノズル口
12から(直径30mmx3本)から脱硫剤を、ノズル
口13(直径30mmX3本)がら脱珪剤をN2ガスを
キャリヤガスとして投入した。
In the case of this example, the desulfurizing agent was introduced through the nozzle ports 12 (30 mm in diameter x 3) provided on the wall of the immersion block 11, and the desiliconizing agent was injected through the nozzle ports 13 (30 mm in diameter x 3) with N2 gas as a carrier gas.

なお、脱硫剤として、生石灰80%、カルシウムカーバ
イトCCaC2) 15%、螢石5%をN2ガスにより
、脱硫剤(70kg/分)”N2  (5イ/分)の割
合で吹込んだ。
As a desulfurizing agent, 80% quicklime, 15% calcium carbide (CCaC2), and 5% fluorite were blown in with N2 gas at a rate of desulfurizing agent (70 kg/min) and N2 (5 i/min).

脱珪剤としては、酸化鉄(Fe203 ) 80%、生
石灰(CaO) 20%を、N2ガスをもちいて脱珪剤
(300kg/分) 十N2  (5i/分)の割合で
吹き込んだ。
As a desiliconizing agent, 80% iron oxide (Fe203) and 20% quicklime (CaO) were blown into the tube at a rate of 300 kg/min and 10 N2 (5 i/min) using N2 gas.

このとき得られた処理済み溶銑の注銑部における分析値
は同じく第1表にまとめて示す。
The analytical values of the treated hot metal obtained at this time in the pouring section are also summarized in Table 1.

なお、本発明にあって精錬処理として脱燐処理を目的と
する場合、脱燐剤として、酸化鉄(Fe203 ) 5
0%、生石灰35%、螢石(CaF 2 ) 15%を
圧縮空気により吹き込む。
In addition, in the present invention, when the purpose is dephosphorization treatment as the refining treatment, iron oxide (Fe203) 5 is used as the dephosphorization agent.
0%, quicklime 35%, and fluorite (CaF 2 ) 15% are blown in with compressed air.

上掲表に示す結果からも分かるように脱硫、脱珪は満足
される程度に起こることが分かる。湯温度の低下も80
°Cとほとんど問題とならなかった。
As can be seen from the results shown in the table above, desulfurization and desiliconization occurred to a satisfactory degree. The drop in water temperature is also 80%
°C was hardly a problem.

(効果) 以上のように本発明による精錬効果は今日樋精錬法とし
て要求される程度以上のものがみられ、この面からも本
発明の効果にはすぐれたものがあることが分かる。その
他、実際上の観点に立てばさらに次の点を挙げることが
できる。
(Effects) As described above, the refining effects of the present invention exceed those required for today's gutter refining methods, and from this aspect as well, it can be seen that the effects of the present invention are excellent. In addition, from a practical point of view, the following points can be raised.

fl+底部の耐火物損耗; 単なる流れによる損耗は底部断面を大きくすると軽減で
きが、本発明によれば、むしろ垂直樋および底部は酸化
雰囲気にさらされることが極めて少なくなるため酸化損
耗は殆どなくなり、寿命は通常の樋に較らべ長い。
fl + Refractory wear at the bottom; wear due to simple flow can be reduced by increasing the bottom cross section, but according to the present invention, the vertical gutter and the bottom are exposed to an oxidizing atmosphere very little, so oxidation wear is almost eliminated. The lifespan is longer than regular gutters.

(2)本発明に係る装置は鋳床の極めて狭い場所に設置
することができ、滞在時間を長くするために鋳床を広げ
る場合と比較してはるかに安価に設置できる。また、上
記理由により耐火物の酸化損耗も少なくなるため耐火物
は樋の水平部分に較ベランニングコストは安い。
(2) The device according to the present invention can be installed in an extremely narrow place in the cast bed, and can be installed at a much lower cost than when the cast bed is widened to increase the residence time. Furthermore, for the above reason, the oxidation loss of the refractory is reduced, so the running cost of the refractory is lower than that of the horizontal portion of the gutter.

(3)本発明による溶銑の精錬にあっては溶銑と精錬剤
が向流接触(さらに必要により順流接触)することが最
大の特徴で、そのため精錬剤の反応効率は高い。単なる
湯溜め部に浸漬ノズルを使って精錬剤を吹込む上吹き法
では集塵ロスが7〜15%と云われているが、本発明に
よれば、そのようなロスは皆無である。
(3) The most important feature of the molten pig iron refining according to the present invention is that the molten pig iron and the refining agent are brought into countercurrent contact (and forward flow contact if necessary), and therefore the reaction efficiency of the refining agent is high. In the top-blowing method in which a refining agent is simply blown into a sump using a submerged nozzle, the dust collection loss is said to be 7 to 15%, but according to the present invention, there is no such loss.

【図面の簡単な説明】[Brief explanation of the drawing]

添付図面は、本発明に係る装置の略式斜視図である。 ■=樋精錬装置   2:受銑部 3:注銑部     4:橋部 The accompanying drawing is a schematic perspective view of the device according to the invention. ■=Gutter refining equipment 2: Pigeon receiving section 3: Pouring section 4: Bridge section

Claims (5)

【特許請求の範囲】[Claims] (1)高炉から流出した溶銑を樋に案内して別の容器に
移す期間中に該溶銑の精錬を行う樋精錬方法において、
樋上を流れる溶銑を先ず下向きに案内し、次いで上向き
に案内することを特徴とする、高炉からの溶銑の樋精錬
方法。
(1) In a gutter refining method in which hot metal flowing out of a blast furnace is guided into a gutter and refined during a period of time when the hot metal is transferred to another container,
A gutter refining method for hot metal from a blast furnace, characterized by first guiding the hot metal flowing on the gutter downward and then guiding it upward.
(2)前記の下向きに流れる溶銑に対し向流で精錬剤を
添加し、生成した精錬スラグを溶銑内を浮上させて分離
することを特徴とする、特許請求の範囲第1項記載の、
高炉からの溶銑の樋精錬方法。
(2) A refining agent is added in a countercurrent to the downwardly flowing hot metal, and the generated refining slag is floated in the hot metal and separated.
A gutter refining method for hot metal from a blast furnace.
(3)前記の上向きに流れる溶銑に対し順流で精錬剤を
添加し、生成した精錬スラグを溶銑とともに上向きに流
出させることを特徴とする、特許請求の範囲第1項また
は第2項記載の、高炉からの溶銑の樋精錬方法。
(3) The method according to claim 1 or 2, characterized in that a refining agent is added downstream to the upwardly flowing hot metal, and the generated refining slag is caused to flow upward together with the hot metal. A gutter refining method for hot metal from a blast furnace.
(4)高炉から流出する溶銑を受ける受銑部;精錬済み
の溶銑を他の容器に注出する注銑部;上記受銑部と注銑
部とを接続する溝状の樋部;および 該樋部の適宜箇所に設けた、縦溝状の湯溜め部、から構
成され、前記湯溜め部には溶銑流の上流側から溶銑の下
方流入案内路そして溝底部案内路を経て続いて上方流出
案内路が設けられていることを特徴とする、高炉からの
溶銑の樋精錬装置。
(4) A pig iron receiving part that receives hot metal flowing out from the blast furnace; a pouring part that pours out the refined hot metal into another container; a groove-shaped gutter part that connects the pig iron receiving part and the pig iron pouring part; It consists of a vertically grooved sump section provided at an appropriate location in the gutter section, into which hot metal flows from the upstream side through a downward inflow guide path, a groove bottom guide path, and then an upward outflow. A gutter refining device for hot metal from a blast furnace, characterized in that a guide path is provided.
(5)前記湯溜め部の内側領域に浸漬ブロックを配置し
て、該湯溜め部の内壁と該浸漬ブロックとの間に形成さ
れる領域に前記下方流入案内路、溝底部案内路および上
方流出案内路を順次形成したことを特徴とする、特許請
求の範囲第4項記載の、高炉からの溶銑の樋精錬装置。
(5) An immersion block is arranged in the inner region of the sump, and the lower inflow guide path, the groove bottom guide path, and the upper outflow are provided in the area formed between the inner wall of the sump and the immersion block. 5. A gutter refining device for hot metal from a blast furnace according to claim 4, characterized in that guide paths are formed in sequence.
JP24908184A 1984-11-26 1984-11-26 Method and device for spout refining of molten iron from blast furnace Pending JPS61127805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24908184A JPS61127805A (en) 1984-11-26 1984-11-26 Method and device for spout refining of molten iron from blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24908184A JPS61127805A (en) 1984-11-26 1984-11-26 Method and device for spout refining of molten iron from blast furnace

Publications (1)

Publication Number Publication Date
JPS61127805A true JPS61127805A (en) 1986-06-16

Family

ID=17187715

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24908184A Pending JPS61127805A (en) 1984-11-26 1984-11-26 Method and device for spout refining of molten iron from blast furnace

Country Status (1)

Country Link
JP (1) JPS61127805A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2288456A1 (en) * 2008-05-22 2011-03-02 Novelis, Inc. Oxide restraint during co-casting of metals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2288456A1 (en) * 2008-05-22 2011-03-02 Novelis, Inc. Oxide restraint during co-casting of metals
EP2288456A4 (en) * 2008-05-22 2013-12-25 Novelis Inc Oxide restraint during co-casting of metals

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