JPS5931808A - Stirring vessel for steel making - Google Patents
Stirring vessel for steel makingInfo
- Publication number
- JPS5931808A JPS5931808A JP13981682A JP13981682A JPS5931808A JP S5931808 A JPS5931808 A JP S5931808A JP 13981682 A JP13981682 A JP 13981682A JP 13981682 A JP13981682 A JP 13981682A JP S5931808 A JPS5931808 A JP S5931808A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- molten steel
- vessel
- blowing
- stirring
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
- B22D1/005—Injection assemblies therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【発明の詳細な説明】
本発明ｔＪ、酸素」二吹転炉による溶鋼のＡ″Ｉｌｒ錬
に使用する朋１鋼用檀ｔ′Ｐ容器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a t'P container for Tohoku1 steel used for refining molten steel in an oxygen double-blow converter.
従来性われていた純酸素」二吹転炉による製鋼法でＩ：
Ｊ、 、 ｍ＋をランスノズルにより上部から溶鋼面に
吹口ｅ」ることにより、脱炭、脱燐、脱硫等を行い鋼を
留針し７ていた。しかるに、このように数米の深さをイ
ｊすＺ）溶ｊｐｊに上部から酸素を吹付けるのであるか
ら、反応は酸素が溶鋼面に接する火点てのみ行われ、溶
鋼の移動に＋、このｌ（１〉発生−ｊるＣＯによる自然
楕拌及び温度差に上る対ｒ１１〔に依存し、ていた。そ
のため攪拌が不完１．）、−（ニ一部の溶６÷１のみ酸
化１７、過酸化状態となり鉄、Ｍｌｌ等のイ■用な金属
が酸化され歩留りが低下するなど数々の問題があった。The conventional method of producing pure oxygen steel using a double-blowing converter allows
Decarburization, dephosphorization, desulfurization, etc. were carried out by blowing J, , m+ from above onto the molten steel surface using a lance nozzle, and the steel was then clamped. However, since oxygen is blown into the molten steel from above at a depth of several meters, the reaction occurs only at the hot spot where the oxygen comes into contact with the molten steel surface, and the movement of the molten steel is accompanied by This depended on the natural elliptical stirring caused by the CO generated and the temperature difference. Therefore, the stirring was incomplete 1.), -(d) Only a part of the solution 6 ÷ 1 was oxidized. 17. There were many problems such as overoxidation and oxidation of useful metals such as iron and Mll, resulting in a decrease in yield.
そこで、上記の問題を解決するために転炉の炉底部よυ
酸素を吹込む酸素底吹転炉法（ｑ −ＤＣ−）Ｐ法、０
８Ｍ法）が提案された。この方法に用いられる炉の炉底
部に股１１イされるプラグの一例（ｑ−ｎＯｐ法）を第
１図に示すと、（１１）シ；＋−ｈ−重９°ｉ羽に−１
であゆ、［６ケ−ｔ： （７）内管、ｆＬｉ ｌｄ 外
Ｗ 、 ＋１４１ ＆Ｊ、’ ４ｊ’ ノＩ代部煉に、
テある７、この方法では前記内管■より、１１°１錬に
鮫する多量の酸素を供給するだめ該内Ｔ’（（Ｂ５の径
が２０−３５薗φと大きくなるので、第３図に示す如く
地金の浸入によるノズルレバ吉シをｊ達＆ｙるブ（めし
ＣＶＪ４．７ｆ、７鋼の静圧よυかなり大きな圧力をノ
ズル先端にりえねばならない。即ち第６図におし゛）る
Ｖｌ Ｄｉ、 、１：の流１１１を常時流さねばならな
い１、従って、１ｖ！拌を曹し〃い場合、更には攪拌が
望−ｊしくない、リツ合にも４１′Ｉ−拌ガスを止める
ことができず、攪拌ガスの無駄な消費を招くのみならず
（ひ拌が望−ましくない場合、ｌ持にスラグの酸化ボテ
ンシャルをトげて脱燐を促進し／（い１島含不利となる
一部、羽１」Ｑｌｌの先端の保両のだめに夕１管（１３
からｂＩＬず炭化水；−（りが分解し生成した水素の一
部が溶鋼中に残留ｌ〜、鋼材になった場合３〜６ ｐｐ
ｍを含有することになり品質を劣化さぜる３、そのほか
にも高価な炭化水素を多Ｆ酋に使用［７なし）ノＬ（弓
′ならず、かつしＶ４イρなｔｉｌｌ造のニニー重羽に
１０１）を炉底に１し］〜ろ０個設置１へ′するので取
扱いが困難であるなどの諸問題があった。Therefore, in order to solve the above problem, the bottom of the converter
Oxygen bottom blowing converter method (q-DC-)P method, 0
8M method) was proposed. An example of a plug (q-nOp method) installed at the bottom of the furnace used in this method is shown in Figure 1.
Ayu, [6-t: (7) Inner pipe, fLi ld outer W, +141 &J, '4j' No.I sub-section,
7. In this method, a large amount of oxygen is supplied from the inner tube (2) to 11 degrees per tube. As shown in Fig. 6, it is necessary to apply pressure at the tip of the nozzle that is considerably greater than the static pressure of CVJ4.7f and 7 steel to prevent nozzle lever failure due to metal intrusion. Stream 111 of Di, , 1 must be constantly flowing 1, therefore, 1v! If stirring is not desired, or even if stirring is undesirable, the stirring gas should be stopped. This not only leads to wasteful consumption of stirring gas (if stirring is undesirable, it also increases the oxidation potential of the slag and promotes dephosphorization). Naru part, feather 1" At the tip of Qll, there is Yu 1 tube (13
From bIL, hydrocarbon water; - (a part of the hydrogen generated by the decomposition of li remains in molten steel, 3 to 6 pp when it becomes steel)
3. In addition, expensive hydrocarbons are used in multi-F axes [no 7]. There were various problems such as difficulty in handling because 101) was placed in the bottom of the hearth in the heavy feathers.
木ゞＩｌ′ｉ明（ｄｌ、十述の諸問題を１「１了決する
／こめ種々研究をｉｌｒねた結果完成したものである。This work was completed as a result of various research.
即ち、本発明（・」−１１”ｉ２素を一］二吹き１−る
ことに」：り溶（Ｆｌを梢鈍する容器において、溶鋼面
子に径が［Ｊ、１〜５．０−ｍの８１０孔苓：ろ０〜１
００個治し、１ ′ｃの化学成分がＣ５〜３０ ％残り
ｌｌ′Ｊ： ＭｇＯ、Ａ、／、２０ｓ 、 Ｃｒｔ Ｏ
ｓ 、。That is, in the present invention (-11" i2 element is 1) 2-blown 1-": In a vessel in which molten steel (Fl) is blunted, a diameter of [J, 1 to 5.0 m] is applied to the molten steel surface. 810 Kong Ling: Ro 0~1
00 cured, the chemical components of 1'c remain C5-30%ll'J: MgO, A, /, 20s, CrtO
s,.
ＺｒＯ２の１創又（・二ｌ、２種以−にを含有する耐火
物３しり一体成形窟れ／Ｃフマルイグルホールプラグを
１またシＪ、２以」二装置ｉ’ｆ Ｌ、たことを特徴と
する製鋼用攪拌容）１：）である。Refractories containing 2 or more types of ZrO2 3-hole integrally molded recess/C fumarigluhole plug 1 or more. A stirring vessel for steelmaking characterized by: 1:).
次に、本発明の製鋼用賀拌容Ｒ：＋についで詳細に説明
すると、基本的にｔよ２〜’５ ｌｌ１ｍのヘッドを持
つ１２００〜１７００℃の溶銑又ぐ、１．溶鋼に炉１ｊ
１：よりガスを吹込む場合、ｔｐ位ガヌ吹込孔径がろ、
［Ｊ ｍｍ以１・であれば界面張力が作用［７で溶ｅ
９４−ｌスラグの静圧に等しいガス圧を吹込孔先端に−
ｌジえでおけばバランスがとれてガスの吹込みが殆んど
行わ）１ず又地金の差込みによる孔詰りか生じないとと
を拮出しだ点にある。Next, the steelmaking stirring capacity R: + of the present invention will be explained in detail. Basically, it is a 1200 to 1700°C hot metal straddle with a head of 2 to 5 1 m in diameter. Furnace 1j for molten steel
1: When blowing more gas, the diameter of the injection hole should be around tp.
[If J mm or more 1, interfacial tension acts [7
Apply gas pressure equal to the static pressure of 94-l slag to the tip of the blow hole.
(If the hole is left in the lug, the balance will be maintained and most of the gas will be blown into the hole.) 1) The hole will not be clogged due to the insertion of the bare metal.
第２図は本発明の製鋼用１？１拌容器に設置１／？する
マルテイプルホールプラグ（以下ＭＩ１．Ｐと１１″１
′称する）の−例であり、第４図は前記Ｍ １１１．１
を容器の底部にトラニオン軸に沿って４個直列に配置ｉ
’ｃ Ｌ、だ−例である。（１）は一体成形されだ面１
大物であり、（２）は貫通孔であって例えば１．３咽φ
ステンレス管を埋込んで一体成形された耐火物を金属ｉ
ｊＪ力、＜ −（３１でカバーしたものである。その底
ｒ〜ＩＸにガスを均等に分布するだめの圧力箱（４）が
設けらハ、ている。（５）は該圧力箱の上部金属板であ
す、 （６） Ｉｔ：ｌ：回下部金属板であり、（７）
はガス送入管で！５る。（８）は外巻スリーブであり、
（９）は容器底部のセット煉瓦であり、ｔｌ（）は各藩
外皮である。Figure 2 shows a 1/?1 stirring vessel for steel making according to the present invention. Multi-hole plug (hereinafter referred to as MI1.P and 11″1)
Figure 4 shows the above-mentioned M 111.1.
4 placed in series along the trunnion axis at the bottom of the container i
'c L, is an example. (1) is integrally molded side 1
It is a large one, and (2) is a through hole, for example, 1.3 dia.
Metal i
jJ force, < - (covered in 31. A pressure box (4) is provided at the bottom r to IX to evenly distribute the gas. (5) is the upper part of the pressure box. It is a metal plate, (6) It:l is a lower metal plate, (7)
In the gas feed pipe! 5ru. (8) is an outer sleeve;
(9) is the set brick at the bottom of the container, and tl() is the outer skin of each domain.
本発明において、ノズル耐火物の化学成分中Ｃを５〜３
０９５配合することの理由ｔ、１：、下限として５％未
満では鋼、スラグの浸透が大となり済世が大きく、また
熱的スポーリングによるＪｌ傷が大きいからであり、上
限として６０係を超えると強度面及び面１朗性而で劣る
からである。In the present invention, C in the chemical components of the nozzle refractory is 5 to 3.
Reason for blending 095 t, 1: If the lower limit is less than 5%, the penetration of steel and slag will be large and the damage will be large, and the Jl scratches due to thermal spalling will be large.If the upper limit is more than 60%, This is because it is inferior in terms of strength and physical properties.
又、本発明において、ノズル面１大物の化学成分中Ｍｇ
Ｏ、Ａ、／、２０３ 、 ＣａＯ、Ｃｒ２Ｏ３、ＺｒＯ
，の１種又は２種以」二を含有させることの理由は耐火
物の品質向−１−を図り、耐スポーリング性、偵ｉ１
ＰＰ耗性、強度等の向」二のだめである。In addition, in the present invention, Mg in the chemical components of the nozzle surface is
O, A, /, 203, CaO, Cr2O3, ZrO
The reason for containing one or more of the following is to improve the quality of the refractory, improve spalling resistance, rectification, etc.
This is the second point in terms of PP wear resistance, strength, etc.
又、ノズル面１大物の原料として用いられるものを次に
示す。The materials used as raw materials for the nozzle surface are shown below.
〔酸化物） Ｍｇｏ 、 ＣａＯ、Ｍｇ０−ＣｎＯ、Ｚ
ｒＯ，、Ａ４０、。[Oxide] Mgo, CaO, Mg0-CnO, Z
rO,,A40,.
Ｃｒ２Ｏ３、ＭｇＯＡ７２０ｇ
〔炭素及び炭化物〕Ｃ、ＳＩＣ、ＺｒＣ、ＷＣ、ＭｏＣ
。Cr2O3, MgOA720g [Carbon and carbides] C, SIC, ZrC, WC, MoC
.
Ｂ、Ｃ
〔窒化物Ｊ ８１ＭＮ４ 、 ＩＩＮ
上記の配合物を主成分とする不焼成品又は焼成品及び焼
成後ピッチ含浸［７たものを本発明の対象としており、
この場合の４火物の阜す遣方法は通常の方法によるもの
とする
第６図には本発明の容器へ股１１クーするＭ １１ Ｐ
の貫通孔の径と底吹ガス圧力及び流１ｉ１の関係が示し
であるが、従来のＱ−ＢＯＰの１１孔プラグと比較する
ことによって明らかな如くコントロール中が２倍以」二
であることが理解さ）する。次の第１表は本発明の容器
と従来のＱ −１１０Ｐ’法の容器との比較をしたもの
である。B, C [Nitride J 81MN4, IIN The present invention targets unfired products or fired products containing the above-mentioned compound as a main component, and pitch-impregnated products after firing.
In this case, the method for dispensing the four fireworks is the usual method. Fig. 6 shows the method of discharging the four flames into the container of the present invention.
The relationship between the diameter of the through hole, the bottom blowing gas pressure, and the flow rate 1i1 is shown, and as is clear from the comparison with the conventional 11-hole plug of Q-BOP, it is more than twice as much during control. be understood). Table 1 below compares the container of the present invention with the container of the conventional Q-110P' method.
第１表
又、ｐ１１５図１Ｊ本発明の容器で低炭素鋼をｆＩ’ｆ
針したときの時間とガス流用の１λ９係を承したゲラフ
シ１であり、第６図シよ本発明の容器で高炭塁値の精錬
をり、たときの時間とガス流ｈ１の関係を示し／こグラ
フ図である。Table 1 Also, page 115 Figure 1J low carbon steel fI'f in the container of the present invention
Fig. 6 shows the relationship between time and gas flow h1 when refining to a high coal base value in the container of the present invention. / This is a graph diagram.
上の第１表及び第５図から明らか斤ように、低炭素鋼鞘
蝕では前回出鋼後、しりイ／ユ人開始止でｔ、ｌｌ、安
価なＮ２を０．０２ （Ｎ＋＋／／ｍ１．ｎ Ｔ’ ）
の極めて小田を流し、炉体に伺着しだスラグ等による吹
込孔の１」詰りを防止すると共にプラグを冷却保１１ｂ
ずン、。次いで溶銑の浸入による目詰り防止のだめ１７
１Ｆ、 ｔ、ｉを（Ｊ、 ［Ｊ ４（１％？／ｍｉｎ
Ｔ ） ４でとげ、更に１次蝕開始ど共に溶斜：中−＼
のＮ、の吸収を避けるために吹ｉヘガ７ス４〜ＣＯ，に
変える。さらに吹錬が７４行しでＩＢ？、 １：、ｊ−
が７１６行し、ＣＯ発生により溶鋼攪拌が哀ぐ−てくる
と１溶鋼が過酸化状態に々るので、一旦Ａｒに（り換え
次いで小−ｈｌのＣＯ２を待間迄流す。又、ｆａｒｌ
６図のＩヤチ炭素鋼４１”！６１！でも底吹きガス量は
小−■を流すだけでＡ・、る、、 −ｔ Ｌで、このこ
とは第６図からも理解さ）１．るように吹込プラグの構
造に起因する従来のプラグと本発明のプラグの底吹ガス
ＩＥカ差ａにより本発明で初めて町ｆｉｌリ−なったも
のである。又、本発明の耐火管は化学成分を限定したこ
とがら、耐スポーリング１′と。As is clear from Table 1 and Figure 5 above, in the case of low-carbon steel sheath erosion, after the previous steel tapping, t, ll, cheap N2 was added to 0.02 (N++//m1 .n T')
This prevents the blow hole from clogging due to slag, etc. that has accumulated in the furnace body, and also keeps the plug cool.
Zun,. Next, sump 17 to prevent clogging due to intrusion of hot metal
1F, t, i (J, [J 4(1%?/min
T) Thorn at 4, and melting slope at the start of primary eclipse: Medium-\
To avoid the absorption of N, the blown gas was changed to 4 to 4 CO. Furthermore, there are 74 lines of blowing and IB? , 1:, j-
is line 716, and when the molten steel stirring begins to deteriorate due to the generation of CO, one molten steel reaches the overoxidized state, so it is changed to Ar once (then, a small amount of CO2 is flowed to the waiting room.
In Figure 6, I Yachi carbon steel 41"! 61! However, the amount of bottom blowing gas is A・, ru,, -t L just by flowing a small -■, and this can be understood from Figure 6) 1. Due to the difference in bottom-blown gas IE between the conventional plug and the plug of the present invention due to the structure of the blow-in plug, the fireproof pipe of the present invention is the first to become a town filler. Due to the limited spalling resistance 1'.
耐摩ｆｆ、Ｋ 、強度等の而で停れており耐用身命が著
しくｈ止畏さｉする。The wear resistance, K, strength, etc. are at a standstill, and the life expectancy is extremely low.
第１し１け従来の容器に用いらｉｌでぃたプラグのＪ（
Ｉｉｉｌ・′１、酊２図ＣＦ本発明の容器に用いら）］
るプラグの断面図 ？Ｐ ５図は底吹ガス圧力と流［Ａ
の関係を；＋＋ ｔグラフ図、第４図は本発明の容器底
部にプラグを配置したｆ（面１′ン腰第５Ｍは本発明容
器による低炭素中精錬の吹錬パターンを示すグラフ図、
第６図は同高炭素鋼精練の吹錬パターンを示すグラフ図
であＡ。
＋１）耐−ノく物、（２）貫通孔、（刃金属製カバー、
（４）圧力箱、（５）１一部金ス・べ板、（６）丁部金
属板、（７）ガス９゛う入管、（３）外巻スリーグ、（
（Ｉ）ヒントＩ＋尾、 （＋ｔｉ簀器鉄器鉄皮理人 弁
押士 木 村 三 朗
回 回 佐々木 宗 治３１−
竿 １ 図
Ｍ＃
Ｄ／No. 1 J(
III・'1, No. 2 CF used in the container of the present invention)]
Cross-sectional view of the plug? Figure P5 shows the bottom blowing gas pressure and flow [A
Figure 4 is a graph showing the blowing pattern of low carbon medium refining using the container of the present invention;
FIG. 6 is a graph showing the blowing pattern of refining the same high carbon steel. +1) - resistant material, (2) through hole, (blade metal cover,
(4) Pressure box, (5) Part 1 metal plate, (6) Metal plate at the end, (7) Gas 9゜inlet pipe, (3) Outer winding slegue, (
(I) Hint I + tail, (+ti Stainless Steel Tekki Rijin Benoshishi Kimura Sanro times Sasaki Muneharu 31- Rod 1 Figure M# D/
Claims (1)
いて、溶鋼面下に径が注１〜５．０ ｍｍの８ｉｌｌ
ＪＬ全３ （］〜１００個有しその化学成分がＣ５〜６
【）チｌリリ￥、１． ＭｇＯ、Ａ１２０．％ 、 Ｃ
ｒ２ ｏ、 、 ＺｒＯ２の１ ｆｊＴｉ又シ」、２創
以十を含、イ１する面１火物より一体成形されたマルデ
イポールプラグを１又は２以上配置したことをｔ）に所
とする製鋼用攪拌容器。[Claims] In a vessel for refining molten steel by blowing oxygen twice, an 8ill with a diameter of 1 to 5.0 mm is placed below the surface of the molten steel.
JL total 3 (] ~ 100 pieces, the chemical composition of which is C5~6
[) Chiriri ¥, 1. MgO, A120. %, C
In t), one or more Mardai pole plugs integrally formed from one side of fire, including two or more holes of ZrO2, are arranged. Stirring vessel for steelmaking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13981682A JPS5931808A (en) | 1982-08-13 | 1982-08-13 | Stirring vessel for steel making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13981682A JPS5931808A (en) | 1982-08-13 | 1982-08-13 | Stirring vessel for steel making |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5931808A true JPS5931808A (en) | 1984-02-21 |
Family
ID=15254118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13981682A Pending JPS5931808A (en) | 1982-08-13 | 1982-08-13 | Stirring vessel for steel making |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5931808A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2725392A1 (en) * | 1994-10-05 | 1996-04-12 | Lorraine Laminage | Molten metal container, e.g. ladle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55149750A (en) * | 1979-05-11 | 1980-11-21 | Kawasaki Steel Corp | Gas blowing plug for molten metal vessel |
| JPS586943A (en) * | 1981-07-03 | 1983-01-14 | Nippon Steel Corp | Refractories for blowing of gas for refining of molten metal |
| JPS5811718A (en) * | 1981-07-15 | 1983-01-22 | Nippon Steel Corp | Bottom-blowing nozzle |
-
1982
- 1982-08-13 JP JP13981682A patent/JPS5931808A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55149750A (en) * | 1979-05-11 | 1980-11-21 | Kawasaki Steel Corp | Gas blowing plug for molten metal vessel |
| JPS586943A (en) * | 1981-07-03 | 1983-01-14 | Nippon Steel Corp | Refractories for blowing of gas for refining of molten metal |
| JPS5811718A (en) * | 1981-07-15 | 1983-01-22 | Nippon Steel Corp | Bottom-blowing nozzle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2725392A1 (en) * | 1994-10-05 | 1996-04-12 | Lorraine Laminage | Molten metal container, e.g. ladle |
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