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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