JPH0517809A - Hearth desulfurization method for blast furnace - Google Patents

Hearth desulfurization method for blast furnace

Info

Publication number
JPH0517809A
JPH0517809A JP26854591A JP26854591A JPH0517809A JP H0517809 A JPH0517809 A JP H0517809A JP 26854591 A JP26854591 A JP 26854591A JP 26854591 A JP26854591 A JP 26854591A JP H0517809 A JPH0517809 A JP H0517809A
Authority
JP
Japan
Prior art keywords
hot metal
desulfurization
ladle
desulfurizing agent
blast furnace
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
JP26854591A
Other languages
Japanese (ja)
Inventor
Haruo Ito
春男 伊藤
Iwao Okochi
巌 大河内
Bungo Iino
文吾 飯野
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP26854591A priority Critical patent/JPH0517809A/en
Publication of JPH0517809A publication Critical patent/JPH0517809A/en
Pending legal-status Critical Current

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  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PURPOSE:To enhance the desulfurization efficiency in a pretreatment of molten iron. CONSTITUTION:A desulfurizing agent is blown by a blowing lance 7 into the desulfurization 1 which is tapped from a blast furnace, falls from a molten iron trough 2 and is poured into a molten iron ladle 5. The desulfurization efficiency of the molten iron 1 is improved by utilizing the stirring force of the molten iron dropped and poured into the molten iron ladle 5 in this way.

Description

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

【0001】[0001]

【産業上の利用分野】この発明は溶銑の予備処理におい
て特に脱硫効率の向上を図る高炉鋳床脱硫方法に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast furnace casting bed desulfurization method for improving desulfurization efficiency particularly in hot metal pretreatment.

【0002】[0002]

【従来の技術】製鋼プロセスに先んじて溶銑を脱硫する
技術には、従来は出銑直後に溶銑樋内において脱硫剤を
インジェクションする方法と、受銑後に溶銑予備処理場
へ溶銑台車又はトーピードカーで溶銑を搬送した後、そ
の中に脱硫剤をインジェクションする方法とがある。
2. Description of the Related Art The technology for desulfurizing hot metal prior to the steelmaking process has been conventionally performed by injecting a desulfurizing agent in the hot metal gutter immediately after tapping, or by hot metal trolley or torpedo car to the hot metal pretreatment site after receiving the hot metal. There is a method of injecting a desulfurizing agent into the material after it has been transported.

【0003】特開昭63−199813号では、前者の
技術が開示されており、図3に示される様に高炉炉壁14
に設けられた出銑口15から流出した溶銑1は、溶銑樋2内
を流れる間に、混入した溶滓がスキンマー3で除去さ
れ、且つその後方で噴射バーナランス16よりホッパ17か
ら供給される脱硫剤がインジェクションされる。
Japanese Patent Laid-Open No. 63-199813 discloses the former technique, and as shown in FIG.
The molten pig iron 1 that has flowed out from the tap hole 15 provided in the is, while flowing in the molten pig iron gutter 2, the mixed molten slag is removed by the skinmer 3, and is supplied from the hopper 17 from the injection burner lance 16 behind it. Desulfurizing agent is injected.

【0004】一方特開平1−165710号では、後者
の技術が開示されており、図4に示される様に、受銑後
溶銑予備処理場にトーピードカー18で搬送し、そこで溶
銑1中に脱硫剤をインジェクションしている。
On the other hand, Japanese Patent Laid-Open No. 1-165710 discloses the latter technique. As shown in FIG. 4, after the hot metal is fed to a hot metal pretreatment site by a torpedo car 18, a desulfurizing agent is introduced into the hot metal 1 there. Is being injected.

【0005】[0005]

【発明が解決しようとする課題】そのうち前者の脱硫方
法では、溶銑樋2内に脱硫剤をインジェクションして攪
拌を行なっても、その攪拌が律速段階であるので、脱硫
反応の効率を向上させるために種々の攪拌強化補助手段
を併用しなければならない。又このような攪拌強化補助
手段を用いたとしても、出銑量が5ton/min〜10ton/mi
nの場合に充分な攪拌を行なおうとすると、溶銑1の飛散
等を伴なうので、充分な攪拌力を与えることができなか
った。更に攪拌強化補助手段の1つとして、溶銑樋2の
溶銑1中に攪拌棒(図示なし)を突っ込みこれを攪拌せ
しめる方法があるが、この方法では攪拌棒の周りに溶銑
1が凝固して攪拌できなくなる虞さえある。
In the former desulfurization method, in order to improve the efficiency of the desulfurization reaction, even if the desulfurizing agent is injected into the hot metal gutter 2 and agitated, the agitation is a rate-determining step. Various agitation intensifying auxiliary means must be used together. Even if such a stirring strengthening assisting means is used, the tapping rate is 5 ton / min to 10 ton / mi.
In the case of n, if sufficient stirring was attempted, the hot metal 1 was scattered and so sufficient stirring power could not be given. Further, as one of the means for assisting the strengthening of stirring, there is a method of thrusting a stirring rod (not shown) into the hot metal 1 of the hot metal gutter 2 to stir the molten metal. In this method, the hot metal is surrounded by the stirring rod.
There is even a risk that 1 will solidify and become unable to stir.

【0006】他方後者の脱硫方法では、トーピードカー
18中に貯留された溶銑1に脱硫剤をインジェクションし
て攪拌せしめようとしても、十分な攪拌力が得られな
い。
On the other hand, in the latter desulfurization method, the torpedo car is used.
Even if an attempt is made to inject the desulfurizing agent into the hot metal 1 stored in 18 and stir the mixture, a sufficient stirring force cannot be obtained.

【0007】本発明は従来技術の以上の様な問題に鑑み
創案されたもので、十分な攪拌力の得られる脱硫方法を
提供し、以って該脱硫反応が短時間のうちに終了できる
ようにせんとするものである。
The present invention was devised in view of the above problems of the prior art, and provides a desulfurization method capable of obtaining a sufficient stirring force, so that the desulfurization reaction can be completed in a short time. It is a matter of interest.

【0008】[0008]

【課題を解決するための手段】そのため本発明の高炉鋳
床脱硫方法は、高炉から出銑された溶銑が溶銑取鍋内に
落下注入される間にその中の溶銑に脱硫剤を吹込むこと
を基本的特徴としている。
Therefore, in the method for desulfurizing a blast furnace casting floor according to the present invention, while the hot metal tapped from the blast furnace is dropped and injected into the hot metal ladle, a desulfurizing agent is blown into the hot metal therein. Is a basic feature.

【0009】又第2発明法では、高炉から出銑された溶
銑に脱硫剤を吹込むと共に、その後溶銑傾注樋を経て溶
銑取鍋内に落下注入される溶銑にも更に脱硫剤を吹込む
ことを特徴としている。
Further, in the second invention method, the desulfurizing agent is blown into the hot metal tapped from the blast furnace, and then the desulfurizing agent is further blown into the hot metal which is dropped into the hot metal ladle through the hot metal tilting gutter. Is characterized by.

【0010】[0010]

【作用】溶銑取鍋の中へ滝状になって落下注入される溶
銑の落下エネルギによって該溶銑取鍋内の溶銑を攪拌す
るので、そこに脱硫剤を吹込めば、十分な攪拌力を伴な
って脱硫が行なわれ、短時間のうちに脱硫が完了する。
又第2発明では、上述の様な落下注入の前にも溶銑中に
脱硫剤を吹込んでおくことによって、溶銑傾注樋に落下
した時に脱硫反応の進行に必要な十分な攪拌力を、溶銑
取鍋内に落下する前の段階においても得ておこうという
ものであり、脱硫反応の進行に必要な攪拌力を溶銑落下
中の2箇所で得ることで反応効率を飛躍的に高めること
ができる。
[Function] The hot metal in the hot metal ladle stirs the hot metal in the hot metal ladle due to the falling energy of the hot metal, so if a desulfurizing agent is blown into the hot metal ladle, sufficient stirring force will be generated. Then, desulfurization is performed, and desulfurization is completed within a short time.
In the second invention, the desulfurizing agent is blown into the hot metal even before the drop injection as described above, so that when the hot metal falls into the hot metal inclined trough, a sufficient stirring force necessary for the progress of the desulfurization reaction is obtained. This is to be obtained even before dropping into the pot, and the reaction efficiency can be dramatically increased by obtaining the stirring force necessary for the progress of the desulfurization reaction at two points during the hot metal dropping.

【0011】[0011]

【実施例】以下本発明法の具体的実施例を添付図面に基
づき説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the method of the present invention will be described below with reference to the accompanying drawings.

【0012】図1は本発明の脱硫方法の一実施例を示す
説明図ある。
FIG. 1 is an explanatory view showing an embodiment of the desulfurization method of the present invention.

【0013】出銑口から流出した溶銑1は溶銑樋2に導か
れて流れる。この時溶銑1中に混入している溶滓1aをス
キンマー3で除去する。その後溶銑1は溶銑樋2の中を流
れて溶銑傾注樋4に流入する。この傾注樋4によって溶銑
1は溶銑受入れ容量250tonの溶銑取鍋5の上部に導かれ、
滝状の流下溶銑1となって溶銑取鍋5の中に落下注入され
る。該溶銑取鍋5中の溶銑1は溶滓1aを分離浮上させなが
ら徐々にその湯面を上昇させてくる。
The hot metal 1 flowing out from the tap hole is guided to the hot metal gutter 2 and flows. At this time, the molten slag 1a mixed in the hot metal 1 is removed by a skinmer 3. After that, the hot metal 1 flows through the hot metal gutter 2 and flows into the hot metal tilting gutter 4. Hot metal by this leaning gutter 4
1 is led to the top of the hot metal ladle 5 with a hot metal receiving capacity of 250 tons,
It becomes a waterfall-shaped falling hot metal 1 and is dropped into a hot metal ladle 5. The hot metal 1 in the hot metal ladle 5 gradually raises the molten metal surface while separating and floating the molten slag 1a.

【0014】本実施例では制御弁6の開閉によって送給
調整のなされる主キャリアガス(N2ガス)の送給で吹
込みランス7が溶銑取鍋5内に降下し、取鍋底面から500m
mの位置に静止して、該ランス7先端より取鍋5内の溶銑1
中に主キャリアガスが5m3/minの流量で吹込まれる。こ
の時制御弁8の調整により、粉状の脱硫剤、アルミ滓等
をフルオソリッド化する脱硫剤サスペンダ9から吹込み
ランス7を通じて脱硫剤が溶銑取鍋5内の溶銑1に5〜6kg
/溶銑tonの量で吹込まれ、該溶銑1の脱硫が行なわれる
ようになっている(尚、アルミ滓の吹込み量は0.3kg/
溶銑tonである)。
In this embodiment, the blowing lance 7 descends into the hot metal ladle 5 by the feeding of the main carrier gas (N 2 gas) whose feeding is adjusted by opening and closing the control valve 6, and 500 m from the bottom of the ladle.
While still at the m position, insert the hot metal 1 in the ladle 5 from the tip of the lance 7.
The main carrier gas is blown into it at a flow rate of 5 m 3 / min. At this time, by adjusting the control valve 8, the desulfurizing agent from the desulfurizing agent suspender 9 which makes the powdery desulfurizing agent, aluminum slag, etc. into a fluorosolid through the blowing lance 7 is 5 to 6 kg in the hot metal 1 in the hot metal ladle 5.
/ The amount of hot metal ton is blown to desulfurize the hot metal 1 (The amount of aluminum slag blown is 0.3 kg /
Hot metal ton).

【0015】更に溶銑台車10が停止している軌道11の下
には該台車10の全重量を夫々計量するロードセル12が設
けられている。該ロードセル12によって計量された溶銑
台車10の全重量は、ロードセル信号配線12aを介して演
算器13に入力される。この演算器13に入力された取鍋5
中の溶銑1の重量が25tonを超えた時に該演算器13より信
号線6aを介して信号が発せられ前記制御弁6を開いて吹
込みランス7に主キャリアガスが送給される。次いで演
算器13より信号線8aを介して制御信号が発せられ、前記
制御弁8を開いて該吹込みランス7中に脱硫剤が供給さ
れ、主キャリアガスによって溶銑取鍋5中の溶銑1の中に
該脱硫剤が吹込まれ、その脱硫処理が始まる。
Further, below the track 11 where the hot metal truck 10 is stopped, there are provided load cells 12 for measuring the total weight of the truck 10. The total weight of the hot metal cart 10 measured by the load cell 12 is input to the computing unit 13 via the load cell signal wiring 12a. Ladle 5 input to this calculator 13
When the weight of the hot metal 1 therein exceeds 25 tons, a signal is issued from the calculator 13 via the signal line 6a, the control valve 6 is opened, and the main carrier gas is fed to the blowing lance 7. Then, a control signal is issued from the arithmetic unit 13 via the signal line 8a, the control valve 8 is opened to supply the desulfurizing agent into the blowing lance 7, and the main carrier gas causes the hot metal 1 in the hot metal ladle 5 The desulfurizing agent is blown into the inside of the vessel, and the desulfurization treatment is started.

【0016】溶銑取鍋5の中に溶銑1が注入される所要時
間は約30分であり、該溶銑取鍋5中の受注溶銑1が満杯
の250tonに達すると共に、溶銑1の受入れと脱硫剤、ア
ルミ滓等の吹込みを停止する。ここで溶銑1が注入開始
されてから数分後に脱硫剤、アルミ滓等の吹込みが始ま
り、約20分で終わる。
The time required for pouring the hot metal 1 into the hot metal ladle 5 is about 30 minutes, the ordered hot metal 1 in the hot metal ladle 5 reaches 250 tons full, and the hot metal 1 is received and the desulfurizing agent is added. Stop blowing aluminum slag. A few minutes after the injection of the hot metal 1 started, the blowing of the desulfurizing agent, aluminum slag, etc. started and ended in about 20 minutes.

【0017】図2は本発明の実施例の効果を従来の技術
と比較して示したものである。本発明の実施例において
は脱硫前の溶銑1中の硫黄は0.025%であったが、約20mi
nの脱硫剤、アルミ滓等の吹込みによって、脱硫後の溶
銑1中の硫黄は0.005%以下に減少した。これに対して従
来例では溶銑取鍋5に溶銑1を全量受入れた後に溶銑台車
10を溶銑予備処理場に搬送して、主キャリアガスの流量
を5m3/min、脱硫剤の吹込み量を5〜6kg/溶銑ton、ア
ルミ滓の吹込み量を0.3kg/溶銑tonとし、本発明の実施
例と同様の脱硫作業条件において、脱硫前の溶銑1中の
硫黄0.025%を、約20minの脱硫作業後に0.015%以下に
した。従って従来例では、本発明の実施例の約3倍の溶
銑1中の硫黄が残留する事が判った。
FIG. 2 shows the effect of the embodiment of the present invention in comparison with the prior art. In the examples of the present invention, the sulfur content in the hot metal 1 before desulfurization was 0.025%, but it was about 20 mi.
The amount of sulfur in hot metal 1 after desulfurization was reduced to less than 0.005% by blowing n desulfurizing agent and aluminum slag. On the other hand, in the conventional example, after the hot metal ladle 5 is fully loaded with the hot metal 1
10 was transported to the hot metal pretreatment plant, the main carrier gas flow rate was 5 m 3 / min, the desulfurization agent injection rate was 5 to 6 kg / hot metal ton, and the aluminum slag injection rate was 0.3 kg / hot metal ton, Under the same desulfurization operation conditions as those of the examples of the present invention, the sulfur content in the hot metal 1 before desulfurization was set to 0.025% or less after the desulfurization operation for about 20 minutes. Therefore, in the conventional example, it was found that about 3 times as much sulfur in the hot metal 1 as in the example of the present invention remained.

【0018】以上の本実施例の構成では溶銑取鍋5内に
落下注入される溶銑1中に脱硫剤を吹込む構成としてい
たが、その構成に加えて溶銑樋4中を流れる溶銑1に脱硫
剤を吹込む構成を併用すると更に脱硫効果が高くなるこ
とは言うまでもない。
Although the desulfurizing agent is blown into the hot metal 1 dropped and poured into the hot metal ladle 5 in the above-described configuration of the present embodiment, in addition to this configuration, the desulfurization is performed on the hot metal 1 flowing in the hot metal gutter 4. It goes without saying that the desulfurization effect will be further enhanced by using the composition in which the agent is blown in combination.

【0019】[0019]

【発明の効果】以上詳述した本発明法によれば、溶銑予
備処理の脱硫作業中における溶銑の攪拌力が非常に高い
ため、脱硫効率が向上することになる。従って溶銑を使
用する製鋼プロセスでのコストが低減されることにな
る。又溶銑搬送のトラックタイムが減少して溶銑台車及
び溶銑取鍋の必要数が減少した。
According to the method of the present invention described in detail above, since the stirring force of the hot metal during the desulfurization operation of the hot metal pretreatment is very high, the desulfurization efficiency is improved. Therefore, the cost of the steelmaking process using hot metal is reduced. In addition, the truck time for hot metal transportation was reduced, and the required number of hot metal trucks and hot metal ladle were reduced.

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

【図1】本発明の一実施例の溶銑を脱硫する方法を示し
た説明図である。
FIG. 1 is an explanatory view showing a method of desulfurizing hot metal according to an embodiment of the present invention.

【図2】本発明の実施例の効果を従来例と比較して示し
たグラフである。
FIG. 2 is a graph showing the effect of the embodiment of the present invention in comparison with the conventional example.

【図3】従来の溶銑を脱硫する方法の一例を示した説明
図である。
FIG. 3 is an explanatory view showing an example of a conventional method for desulfurizing hot metal.

【図4】従来の溶銑を脱硫する方法の他の一例を示した
説明図である。
FIG. 4 is an explanatory view showing another example of a conventional method for desulfurizing hot metal.

【符号の説明】[Explanation of symbols]

1 溶銑 2 溶銑樋 4 溶銑傾注樋 5 溶銑取鍋 7 吹込みランス 1 hot metal 2 hot metal gutter 4 Hot metal tilting gutter 5 Hot metal ladle 7 blow lance

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 高炉から出銑された溶銑が溶銑取鍋内に
落下注入される間にその中の溶銑に脱硫剤を吹込むこと
を特徴とする高炉鋳床脱硫方法。
1. A method for desulfurizing a blast furnace cast bed, characterized in that a desulfurizing agent is blown into the hot metal in a hot metal ladle while the hot metal tapped from the blast furnace is dropped and poured into the hot metal ladle.
【請求項2】 高炉から出銑された溶銑に脱硫剤を吹込
むと共に、その後溶銑傾注樋を経て溶銑取鍋内に落下注
入される溶銑にも更に脱硫剤を吹込むことを特徴とする
高炉鋳床脱硫方法。
2. A blast furnace characterized in that the desulfurizing agent is blown into the hot metal tapped from the blast furnace, and then the desulfurizing agent is further blown into the hot metal dropped into the hot metal ladle through the hot metal tilting gutter. Casting bed desulfurization method.
JP26854591A 1991-05-07 1991-09-20 Hearth desulfurization method for blast furnace Pending JPH0517809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26854591A JPH0517809A (en) 1991-05-07 1991-09-20 Hearth desulfurization method for blast furnace

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP10154091 1991-05-07
JP3-101540 1991-05-07
JP26854591A JPH0517809A (en) 1991-05-07 1991-09-20 Hearth desulfurization method for blast furnace

Publications (1)

Publication Number Publication Date
JPH0517809A true JPH0517809A (en) 1993-01-26

Family

ID=26442404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26854591A Pending JPH0517809A (en) 1991-05-07 1991-09-20 Hearth desulfurization method for blast furnace

Country Status (1)

Country Link
JP (1) JPH0517809A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5912091A (en) * 1996-10-16 1999-06-15 Matsushita Electric Industrial Co., Ltd. Battery having spirally wound electrodes
US11788715B2 (en) 2019-06-27 2023-10-17 Nichia Corporation Lighting device and light installation method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51105914A (en) * 1975-03-14 1976-09-20 Sumitomo Metal Ind
JPS60184613A (en) * 1984-03-02 1985-09-20 Sumitomo Metal Ind Ltd Pretreatment of molten iron
JPS63199813A (en) * 1987-02-13 1988-08-18 Nippon Steel Corp Method for pretreating molten iron by using plural nozzle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51105914A (en) * 1975-03-14 1976-09-20 Sumitomo Metal Ind
JPS60184613A (en) * 1984-03-02 1985-09-20 Sumitomo Metal Ind Ltd Pretreatment of molten iron
JPS63199813A (en) * 1987-02-13 1988-08-18 Nippon Steel Corp Method for pretreating molten iron by using plural nozzle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5912091A (en) * 1996-10-16 1999-06-15 Matsushita Electric Industrial Co., Ltd. Battery having spirally wound electrodes
US6042625A (en) * 1996-10-16 2000-03-28 Matsushita Electric Industrial Co., Ltd. Method of fabricating batteries having spirally wound electrodes
US11788715B2 (en) 2019-06-27 2023-10-17 Nichia Corporation Lighting device and light installation method

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