JPH055112A - Method for pre-treating molten iron - Google Patents
Method for pre-treating molten ironInfo
- Publication number
- JPH055112A JPH055112A JP14634791A JP14634791A JPH055112A JP H055112 A JPH055112 A JP H055112A JP 14634791 A JP14634791 A JP 14634791A JP 14634791 A JP14634791 A JP 14634791A JP H055112 A JPH055112 A JP H055112A
- Authority
- JP
- Japan
- Prior art keywords
- hot metal
- car
- molten iron
- gas
- bubble
- 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
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は溶銑予備処理方法に関す
るもので、スロッピング（スラグおよび溶銑のトピード
カー外への流出）の抑制を目的とする。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot metal pretreatment method, and an object thereof is to suppress sloping (outflow of slag and hot metal out of a tope car).
【０００２】[0002]
【従来の技術】従来の溶銑予備処理方法では、溶銑中に
吹き込む粉体および気体の吹き込み速度を下げることに
より、スロッピングを減少させる方法が知られている。2. Description of the Related Art As a conventional hot metal pretreatment method, there is known a method of reducing sloping by lowering the blowing speed of powder and gas blown into the hot metal.
【０００３】[0003]
【発明が解決しようとする課題】従来の技術で述べた方
法では、粉体および気体の吹き込み時間が増加し、吹き
込み中の溶銑温度降下が増加するという問題点を有して
いた。本発明の目的とするところは、粉体および気体を
高速で吹き込み、かつスロッピングを減少させようとす
るものである。The method described in the prior art has a problem that the time for blowing powder and gas is increased and the drop in hot metal temperature during blowing is increased. An object of the present invention is to blow powder and gas at high speed and to reduce sloping.
【０００４】[0004]
【課題を解決するための手段】本発明は、従来技術の課
題を有利に解決するものであって、その要旨とするとこ
ろは下記のとおりである。溶銑中にインジェクションラ
ンスを浸漬し、粉体および気体を吹き込む溶銑予備処理
方法において、気泡盛り上がり比（ｒ／ｒ0 ）が０．３
以上であることを特徴とする溶銑予備処理方法。DISCLOSURE OF THE INVENTION The present invention advantageously solves the problems of the prior art, and the gist thereof is as follows. In the hot metal pretreatment method of immersing an injection lance in hot metal and blowing powder and gas, the bubble swelling ratio (r / r 0 ) is 0.3.
The above is the hot metal pretreatment method.
【０００５】ｒ ：トピードカーの中心から気泡盛り上
がり位置までのトピードカー胴部半径方向の距離 ｒ0 ：トピードカー胴部半径 以下図面を用いて本発明を説明する。図１は本発明の実
施例を示す図である。トピードカー１内に溶銑３が装入
されていて、溶銑３の上部にスラグ４が浮遊している。
この溶銑３内部にインジェクションランス２を浸漬し、
酸化鉄、フラックス、気体酸素およびキャリアガス５を
インジェクションして、溶銑脱りんを行う。R: distance in the radial direction of the speeded car body from the center of the speeded car to the rising position of the bubble r 0 : radius of the speeded car body The present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention. The hot metal 3 is loaded in the tope car 1, and the slag 4 floats above the hot metal 3.
Immerse the injection lance 2 inside this hot metal 3,
Hot metal dephosphorization is performed by injecting iron oxide, flux, gaseous oxygen and carrier gas 5.
【０００６】図２は図１の水平方向の断面図である。イ
ンジェクションランス２から吹き込まれたガスがスラグ
４表面上で気泡盛り上がり位置６において浮上する。ｒ
0 はトピードカー１の胴部半径である。ｒは、トピード
カー１の中心から気泡盛り上がり位置６までのトピード
カー胴部半径方向の距離である。図３は図２の詳細図で
ある。Ｌ0 はインジェクションランス２の水平方向の半
径、ｌはインジェクションランス２内のノズル先端から
気泡盛り上がり位置６までの距離、ｄはインジェクショ
ンランス２内のノズル先端の直径、θはトピードカー長
手方向から水平方向への酸化鉄、フラックス、気体酸素
およびキャリアガス５の吹き込み角度である。FIG. 2 is a horizontal sectional view of FIG. The gas blown from the injection lance 2 floats on the surface of the slag 4 at the bubble rising position 6. r
0 is the body radius of the tope car 1. r is the distance in the radial direction of the speeded car body from the center of the speeded car 1 to the bubble rising position 6. FIG. 3 is a detailed view of FIG. L 0 is the horizontal radius of the injection lance 2, l is the distance from the nozzle tip in the injection lance 2 to the bubble rising position 6, d is the diameter of the nozzle tip in the injection lance 2, and θ is the horizontal direction from the longitudinal direction of the toped car. It is the angle at which iron oxide, flux, gaseous oxygen and carrier gas 5 are blown into.
【０００７】インジェクションランス２内のノズル先端
から気泡盛り上がり位置６までの距離ｌおよびトピード
カー１の中心から気泡盛り上がり位置６までのトピード
カー胴部半径方向の距離ｒは、（１），（２）および
（３）式で表わされることが実験的に公知である。The distance 1 from the tip of the nozzle in the injection lance 2 to the bubble rising position 6 and the distance r in the radial direction of the speeded car body portion from the center of the toeped car 1 to the bubble rising position 6 are (1), (2) and ( It is experimentally known to be represented by the formula 3).
【０００８】[0008]
【数１】 [Equation 1]
【０００９】気泡の盛り上がり位置６が（４）式の関係
を満たすとき、 ｒ／ｒ0 ≧０．３ …（４） トピードカー長手方向を軸とした溶銑の湯面変動と気泡
の盛り上がりが共振して起きるローリング運動が抑制さ
れ、スロッピングが抑制される。When the bubble rising position 6 satisfies the relation of the expression (4), r / r 0 ≧ 0.3 (4) The fluctuation of the molten metal surface around the longitudinal direction of the speeder car and the bubble rising resonate with each other. The rolling motion that occurs as a result is suppressed, and sloping is suppressed.
【００１０】[0010]
【実施例】図４は本発明によるガス吹き込み角度と気泡
盛り上がり比との関係を示すものである。溶銑が２６０
ｔ入ったトピードカー（ｒ0 ＝１５００ｍｍ）に、ラン
ス半径Ｌ 0 ＝１５０ｍｍ、ノズル直径ｄ＝３０ｍｍ、ノ
ズル孔数が２つのインジェクションランスを溶銑表面よ
り１０００ｍｍの深さで浸漬し、トピードカー長手方向
から水平方向へのガス吹き込み角度θを変化させ、気体
酸素およびキャリアガスのトータルガス流量を３０Ｎｍ
3 ／min にして脱りん処理を実施した。気泡盛り上がり
比ｒ／ｒ0 が０．３未満になる範囲、すなわちθが０°
≦θ≦４５°の範囲では、トピードカー長手方向を軸と
した溶銑の湯面変動と気泡の盛り上がりが共振して起き
る溶銑のローリング運動により、スロッピング（スラグ
および溶銑のトピードカー外への流出）が生じる。EXAMPLE FIG. 4 shows a gas injection angle and bubbles according to the present invention.
It shows the relationship with the rise ratio. 260 hot metal
Topeed car containing t (r0= 1500 mm), run
Radius L 0= 150 mm, nozzle diameter d = 30 mm,
An injection lance with two holes is used as the hot metal surface.
Immerse at a depth of 1000 mm, and the longitudinal direction of the toped car
Change the gas injection angle θ from the
Total gas flow rate of oxygen and carrier gas is 30 Nm
3/ Min and the dephosphorization treatment was performed. Bubble rise
Ratio r / r0Is less than 0.3, that is, θ is 0 °
In the range of ≦ θ ≦ 45 °, the longitudinal direction of the tope car is the axis.
The molten metal level fluctuation and the rising of the bubbles resonated
The rolling motion of the hot metal causes sloping (slag
And outflow of hot metal to the outside of the toped car).
【００１１】気泡盛り上がり比ｒ／ｒ0 が０．３以上の
範囲、すなわちθが４５°＜θ≦９０°の範囲では、溶
銑の湯面変動と気泡の盛り上がりの共振が起きず、溶銑
のローリング運動が抑制され、スロッピングが減少す
る。When the bubble swell ratio r / r 0 is 0.3 or more, that is, when θ is in the range of 45 ° <θ ≦ 90 °, resonance of molten metal level change and bubble swell does not occur, and hot metal rolling occurs. Movement is suppressed and slopping is reduced.
【００１２】[0012]
【発明の効果】本発明によって、粉体および気体の吹き
込み時間が短縮し、吹き込み中の溶銑温度降下を減少さ
せることが可能となる。According to the present invention, it is possible to shorten the blowing time of powder and gas and to reduce the drop in hot metal temperature during blowing.
【図１】本発明の実施の態様を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.
【図２】図１の水平方向の断面図である。FIG. 2 is a horizontal sectional view of FIG.
【図３】図２の詳細図である。FIG. 3 is a detailed view of FIG.
【図４】本発明によるガス吹き込み角度と気泡盛り上が
り比との関係を示す図である。FIG. 4 is a diagram showing a relationship between a gas blowing angle and a bubble rising ratio according to the present invention.
１ トピードカー ２ インジェクションランス ３ 溶銑 ４ スラグ ５ 酸化鉄＋フラックス＋気体酸素＋キァリアガス ６ 気泡盛り上がり位置 1 Topeed Car 2 Injection Lance 3 Hot Metal 4 Slag 5 Iron Oxide + Flux + Gaseous Oxygen + Carrier Gas 6 Bubble Rise Position
───────────────────────────────────────────────────── フロントページの続き (72)発明者 相田 英二 千葉県君津市君津１番地 新日本製鐵株式 会社君津製鐵所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiji Aida 1 Kimitsu, Kimitsu-shi, Chiba Nippon Steel Corp. Inside Kimitsu Works
Claims (1)
し、粉体および気体を吹き込む溶銑予備処理方法におい
て、気泡盛り上がり比（ｒ／ｒ0 ）が０．３以上である
ことを特徴とする溶銑予備処理方法。 ｒ ：トピードカーの中心から気泡盛り上がり位置まで
のトピードカー胴部半径方向の距離 ｒ0 ：トピードカー胴部半径Claim: What is claimed is: 1. A hot metal pretreatment method in which an injection lance is immersed in hot metal and a powder and a gas are blown into the hot metal so that the bubble swelling ratio (r / r 0 ) is 0.3 or more. Characteristic hot metal pretreatment method. r: distance in the radial direction of the body of the toeped car from the center of the topede car to the position where the bubbles rise up r 0 : radius of the body of the toeded car
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14634791A JPH055112A (en) | 1991-06-18 | 1991-06-18 | Method for pre-treating molten iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14634791A JPH055112A (en) | 1991-06-18 | 1991-06-18 | Method for pre-treating molten iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH055112A true JPH055112A (en) | 1993-01-14 |
Family
ID=15405655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14634791A Pending JPH055112A (en) | 1991-06-18 | 1991-06-18 | Method for pre-treating molten iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH055112A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6314252B1 (en) | 2000-03-09 | 2001-11-06 | Toshiba Tec Kabushiki Kaisha | Image forming apparatus and method of a forming image |
| USD861073S1 (en) | 2017-04-03 | 2019-09-24 | Pepsico, Inc. | Vending machine |
| USD862594S1 (en) | 2016-04-27 | 2019-10-08 | Pepsico, Inc. | Vending machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6199615A (en) * | 1984-10-22 | 1986-05-17 | Kobe Steel Ltd | Dephosphorizing and desulfurizing method of molten iron |
-
1991
- 1991-06-18 JP JP14634791A patent/JPH055112A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6199615A (en) * | 1984-10-22 | 1986-05-17 | Kobe Steel Ltd | Dephosphorizing and desulfurizing method of molten iron |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6314252B1 (en) | 2000-03-09 | 2001-11-06 | Toshiba Tec Kabushiki Kaisha | Image forming apparatus and method of a forming image |
| USD862594S1 (en) | 2016-04-27 | 2019-10-08 | Pepsico, Inc. | Vending machine |
| USD861073S1 (en) | 2017-04-03 | 2019-09-24 | Pepsico, Inc. | Vending machine |
| USD868894S1 (en) | 2017-04-03 | 2019-12-03 | Pepsico, Inc. | Vending machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19960227 |