JPS59153818A - Refining process in top and bottom-blown converter - Google Patents
Refining process in top and bottom-blown converterInfo
- Publication number
- JPS59153818A JPS59153818A JP2743483A JP2743483A JPS59153818A JP S59153818 A JPS59153818 A JP S59153818A JP 2743483 A JP2743483 A JP 2743483A JP 2743483 A JP2743483 A JP 2743483A JP S59153818 A JPS59153818 A JP S59153818A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- blowing
- gas
- blown
- blowing nozzle
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
Abstract
Description
【発明の詳細な説明】
安定したマッシュルームを形成せしめることにより底吹
ノズルの寿命延長を図り精錬効率を高めることを可能な
らしめる前記精錬法を提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides the above-mentioned refining method which makes it possible to extend the life of the bottom blowing nozzle and improve the refining efficiency by forming stable mushrooms.
近年転炉における精錬効率を高めるために上吹ランスよ
シ酸素（Ｏｚ）’ｒ，浴面下の底吹ノズルより攪拌ガス
を底吹きする上底吹転炉精錬が積極的に実施されるよう
になっている。In recent years, in order to improve the refining efficiency in converters, top-bottom blowing converter refining, in which oxygen (Oz)'r is blown from top-blowing lances and stirring gas is bottom-blown from bottom-blowing nozzles below the bath surface, has been actively implemented. It has become.
而して前記上底吹転炉精錬を可能ならしめるために種々
の構造の底吹ノズルやガス吹込み法等が提案されている
。In order to make the top-bottom blowing converter refining possible, various bottom-blowing nozzle structures and gas blowing methods have been proposed.
例えば耐火物で形成されたプラグに細径の貫通孔を複数
個設けて底吹ノズルを構成したもの、前記貫通孔を耐火
物本体とは異なる材質からなる管状体で構成したもの、
さらには底吹きガス量を精錬条件によって適宜制御する
方法等が提案され、試用されている。For example, a bottom-blowing nozzle is constructed by providing a plurality of small-diameter through holes in a plug made of refractory material, and a plug in which the through holes are constructed from a tubular body made of a material different from that of the refractory body;
Furthermore, methods for appropriately controlling the amount of bottom-blown gas according to refining conditions have been proposed and are being used on a trial basis.
ところが前記従来の底吹ノズルでは、単体としてのプラ
グに構成される貫通孔は、比較的少数の複数個設けるか
、あるいは所定断面内にできるだけ多く設ける程度の技
術思想しかなかった。このため前述した底吹きガスの吹
込み制御範囲が極く限られたものとなったり、あるいは
底吹ノズルとし７ての強度低下を招き、その耐用寿命は
極めて短かく、長期間、安定した操業を実施することは
困難であった。However, in the conventional bottom blowing nozzle, the only technical idea was to provide a relatively small number of through holes in a single plug, or to provide as many through holes as possible within a predetermined cross section. For this reason, the blowing control range of the bottom blowing gas described above becomes extremely limited, or the strength of the bottom blowing nozzle 7 is reduced, and its service life is extremely short, making it difficult to operate stably for a long period of time. was difficult to implement.
ところで底吹ノズルより攪拌ガスを吹込むと底吹ノズル
の直上にマツジ−ルームが形成されることは周知である
。該マｙ７ユルームは、溶融金属、即ち溶湯の半凝固物
の耳状構成体であって底吹ノズルや炉底部耐火物を溶湯
−・ら課護すると共にガス吹込みを円滑にする作用があ
る。ところが該マツジ−ルームの構成は極めて脆弱であ
り、状況によってはたちまち消失したり、その反面凝固
体てなり易いなど安定的に維持することが困難で、かつ
扱い：（りい構成体である。By the way, it is well known that when agitation gas is blown in from a bottom blowing nozzle, a matzi room is formed directly above the bottom blowing nozzle. The my7 room is an ear-like structure of molten metal, that is, semi-solidified molten metal, and has the function of protecting the bottom blowing nozzle and the furnace bottom refractory from the molten metal and smoothing gas injection. . However, the structure of the matge room is extremely fragile, and it is difficult to maintain it stably, as it can quickly disappear depending on the situation, and on the other hand, it tends to form a solidified substance, and it is difficult to handle.
本発明者等は／ｇθ屯の実操業の転炉において種々の実
験、研究を繰返した結果、前述した細径の貫通孔を設け
た底吹ノズルにおいて、貫通孔の構成、大きさ、ノズル
断面（て対する集合率およびガス吹込み量等が前記安定
］７たマツンール〜ムを形成せしめるうえから極めて重
要な影響を与えると云う知見を得たつ
本発明は、前記知見に基づき、さらに実験研究を重ねだ
結果発明されたものである０
以下実施例に基づき本発明を詳述する。As a result of repeated various experiments and research in a converter in actual operation at /gθtun, the inventors of the present invention have determined that the configuration, size, and nozzle cross section of the through-hole in the bottom blowing nozzle provided with the above-mentioned small-diameter through-hole. (The aggregation rate and gas injection amount, etc. are stable as described above) 7) Based on the above knowledge, the present invention has obtained the knowledge that it has an extremely important influence on the formation of the matun room. This invention was invented as a result of repeated efforts.The present invention will be described in detail below based on Examples.
第１図は本発明に基づく一実施例を示すもので底吹集合
ノズルとその炉底部耐火物への装着状況を示す断面構造
図であシ、第２図は前記ノズルの平面図である。FIG. 1 shows an embodiment of the present invention, and is a cross-sectional structural view showing a bottom blowing collective nozzle and how it is attached to a furnace bottom refractory, and FIG. 2 is a plan view of the nozzle.
図シでおいて／は耐火物！で形成された単体ノズルであ
り、前記耐火物２に金属、Ｓイブ３を後述する設定集合
率で埋設して底吹集合ノズルｌｌ（以下、底吹ノズルグ
と云う）を構成している０該底吹ノズルダは、例えば羽
（コ煉瓦Ｓを介して炉底煉瓦壁乙に装着されている。７
けガス供給管であり、攪拌ガスは該ガス供給管７よシ単
体ノズル／ＶＣ設けられたヘッダ一部ｇを介して金属パ
イプ３に供給され、該金属パイプ３より炉内へ吹込まれ
る。９はノズル押え煉瓦を示す。In the figure, / is refractory! It is a single nozzle formed of a bottom-blowing collective nozzle 11 (hereinafter referred to as a bottom-blowing nozzle) by embedding a metal Sib 3 in the refractory 2 at a set collection rate described later. The bottom blowing nozzle is attached to the hearth brick wall B via, for example, a blade (brick S).7
The stirring gas is supplied to the metal pipe 3 through the gas supply pipe 7 through a header part g provided with a single nozzle/VC, and is blown into the furnace from the metal pipe 3. 9 indicates a nozzle holding brick.
さて、前記底吹ノズルグを用いて攪拌ガスを底吹きする
と底吹ノズルグの直りに前述の如くマ、ツシュルームが
形成される。一方、攪拌ガスは、炉内の溶湯の静圧に抗
しかつ、溶湯を効率的（（攪埋するためて通常Ｓ〜／
３ Ｖｒｓ２の圧力で吹送まれる。Now, when the agitation gas is bottom-blown using the bottom-blowing nozzle, a mushroom is formed as described above right at the bottom-blowing nozzle. On the other hand, the stirring gas resists the static pressure of the molten metal in the furnace and efficiently moves the molten metal.
It is blown at a pressure of 3 Vrs2.
ところで本発明者等の実、＠では、単体ノズル／（（金
属パイプ３を埋設した底吹ノズルダを用いると金属パイ
プ、３に溶湯が凝着しこれを起点としてマソンールーム
が形成され易く、又、一旦形成されたマツンールームは
剥離ししてくいことが確認さｔした。しかし前記金寓バ
イブ３は、その大きさが大きくなると第３図に示すよう
１て溶湯が金属ノ＜イブ３１て浸入する、いわゆる地金
差し込み現象が生じ易くなり、この結果、ノズル詰りと
なったり、そのノズル詰りして起因して一旦形成された
マツシュルーム／θが剥離することも判った。By the way, the inventors of the present invention have found that when using a single nozzle/((bottom-blowing nozzle with a buried metal pipe 3), the molten metal adheres to the metal pipe 3, and a mason room is likely to be formed from this as a starting point. It has been confirmed that once formed, the metal tube 31 is difficult to peel off.However, when the size of the metal tube 3 becomes large, molten metal tends to penetrate through the metal tube 31, as shown in FIG. It has also been found that the so-called bare metal insertion phenomenon tends to occur, resulting in nozzle clogging, and the once-formed pine mushroom/θ peeling off due to the nozzle clogging.
さら（（実験ヲ換返した結果、金属パイプ３の形状の如
何してか＼わらずその断面積が３０ｍｍ２を超えると前
記現象が顕著（（表われ、逆に３θ鮒２以下の大きさで
あれば前記現象は全く生じないことも確認された。Furthermore, ((as a result of repeating the experiment), the above-mentioned phenomenon is noticeable when the cross-sectional area exceeds 30 mm2, regardless of the shape of the metal pipe 3. It was also confirmed that the above phenomenon did not occur at all.
本発明において金属パイプ３の浴（（接する側の断１■
墳全３θｍｍ２以ｒに限定したのは前記理由からである
。In the present invention, the bath of the metal pipe 3 ((the cut on the contact side 1)
The reason why the total diameter of the tomb was limited to 3θmm2 or less is for the reason mentioned above.
次に前記金属パイプ３の単体ノズル／における数および
配列等は、正常なマ、７シユル−ム／θを形成させるう
えから極めて重要である。例えば単体ノズル／の大きさ
に対して金属ノζイブ３の数が少なかったり、一定部分
にのみ集中して設けられた底吹ノズルダでは、正常なマ
ツシュル−ムを形成しないことが判明した。Next, the number and arrangement of the single nozzles of the metal pipe 3 are extremely important for forming a normal ma, 7 shroom/θ. For example, it has been found that a bottom blowing nozzle in which the number of metal ζ ribs 3 is small relative to the size of the single nozzle or in which they are concentrated only in a certain area does not form a normal pine mushroom.
この知見に基づきさらに研究を行った結果、単体ノズル
／に埋設される金属パイプ３の相互間隔を後述する所定
距離以下に保持せしめると共に単体ノズル／の平断面積
に対する金属ノ々イブ３の断面占積率を設定範囲内とす
ることが効果的であることが判った。即ちノズルまわり
の溶湯と底吹きされる攪拌ガスとの熱バランスを最適に
制御すること（でよって、個々の金属パイプ３の先端に
凝着し、生長を開始したマンンユルームは、相隣り合う
金属パイプ上のマツシュルームと連結し、第９図すに示
すように底吹ノズルグの上面全体を覆い耳状の形状を呈
（７だ正常なマツシュルームを形成する。As a result of further research based on this knowledge, we found that the distance between the metal pipes 3 buried in the single nozzle was maintained at a predetermined distance or less, which will be described later, and that the cross-sectional area of the metal nozzle 3 was It has been found that it is effective to keep the product moment within a set range. In other words, by optimally controlling the heat balance between the molten metal around the nozzle and the stirring gas blown from the bottom (therefore, the manuyu room that has adhered to the tip of each metal pipe 3 and started to grow, It is connected to the upper pine mushroom, and covers the entire upper surface of the bottom blowing nozzle to form an ear-like shape as shown in Figure 9 (7) to form a normal pine mushroom.
前記熱バランスを最適に保持するためては１本発明者等
の経験では、金属パイプ３の相互間距離ｔ（第２図）を
下記（１）式を満足する距離とすると共（て、金属パイ
プ３を単体ノズル／のほぼ全面に均等に分布せしめ、単
体ノズルの平断面積ＡＶｃ対する金・寓パイプ３の総断
面積Σａの比Ｘａをθ、２り〜／ｑ係とすればよいこと
が五′、認された。In order to optimally maintain the heat balance, the inventors have found that the distance t between the metal pipes 3 (Fig. 2) is set to a distance that satisfies the following formula (1), and The pipes 3 should be distributed evenly over almost the entire surface of the single nozzle /, and the ratio Xa of the total cross-sectional area Σa of the metal pipe 3 to the flat cross-sectional area AVc of the single nozzle should be set to θ, the ratio of 2 to /q. 5' was approved.
／−＜／：、、２Ｘ／θ−”Ｘ ’／ −＋１１ｔ：
金属パイプの相互間距離（ｃｍ ）Ｔ：金属パイプ／本
轟りのガス流量
（ｒｍ３／ｓ ｅ ｃ ）
Ｌ：金属パイプ／本当りの内周長（ｃｍ）尚、本発明１
ておいて集合率とは、前述の如く金属パイプの相互間距
離ｔを所定距離以下としつｈ 、ｔ１体ノズル／のほぼ
全面（て、均等に分布せしめて配列したときの単体ノズ
ル横断面積に対する金属パイプの総断面積の割合を云う
ものである。/-</:,,2X/θ-”X'/-+11t:
Mutual distance between metal pipes (cm) T: Metal pipe/real gas flow rate (rm3/sec) L: Metal pipe/inner circumference length of main (cm) Invention 1
As mentioned above, the aggregation rate is defined as the distance t between the metal pipes being equal to or less than a predetermined distance, h, almost the entire surface of the nozzle (t), and the cross-sectional area of the single nozzle when arranged evenly. It refers to the percentage of the total cross-sectional area of a metal pipe.
さて第９図は、前記集合率と形成されたマツンユルーｌ
、および底吹ノズル内の温度分布の関係の調査結果を示
すものである。該第９図より判明するように集合率がθ
、、２１１〜／り係 の底吹ノズル（実施例ｂ）では底
吹ノズルグの全面を覆う正常な７７シユルーム／θが形
成され、溶湯による底吹ノズルグの溶損が防止されると
共に底吹ノズルにおける温度分布も均一なものとなる。Now, Figure 9 shows the aggregation rate and the formed Matsunyuru l.
, and the relationship between the temperature distribution inside the bottom blowing nozzle. As is clear from FIG. 9, the aggregation rate is θ
In the bottom blowing nozzle (Example b) of 211~/Register, a normal 77 shroom/θ is formed that covers the entire surface of the bottom blowing nozzle, which prevents the bottom blowing nozzle from being melted and damaged by the molten metal, and also prevents the bottom blowing nozzle from being damaged by the molten metal. The temperature distribution will also be uniform.
この結果、スポーリングによる損傷も激減し、底吹ノズ
ルグの寿命が大巾に向上した、これに対し、集合率がθ
２グ襲未満の底吹ノズル、例え−ば遺施例ａでは個々の
金属パイプ３の上部にそれぞれ独立した小型（７’）−
ｒッンユルーム１０ａが形成される程度であり、又実施
例ｄでは集中的に配列された金属パイプ３の上部のみに
マツシュルーム／θｂが形成される程度である。而して
、いずれも底吹ノズルグを溶湯より完全に保護すること
はできず、温度分布も犬きくバラつくことがら溶損やス
ポーリングによる損傷も激しく底吹ノズルグの寿命は極
めて短いものであった。逆に集合率が／ダ係を超えた実
施例Ｃではノズル上の熱バランスが過冷却となり、肥大
化シたマツシュルーム／θＣとなってマツシュルーム１
０ｃが不安定となるうえにノズル自体の強度が著しく低
下し、この結果その寿命も短いものであった０
さて、前述した本発明の底吹ノズルグを用いて攪拌ガス
を底吹きすると攪拌ガスは、単体ノズル／のほぼ全面か
ら均等（で吹込まれることから少量の吹込み量でも優・
比た溶湯の攪拌効率を得ることが可能となる。加えて本
発明の底吹ノズルグでは金暎パイプ３の断面積が３θｍ
ｒ４２以下であることから少量の吹込量でも地金差し込
み現象が防止でき、少量の吹込制御が充分可能である。As a result, damage caused by spalling has been drastically reduced, and the life of the bottom blowing nozzle has been greatly improved.
A bottom-blowing nozzle with a stroke of less than 2 g, for example, in Example A, an independent small (7') nozzle is installed at the top of each metal pipe 3.
In Example d, only the upper portions of the metal pipes 3 that are arranged in a concentrated manner have a pine mushroom room/θb formed. However, neither of these methods can completely protect the bottom blowing nozzle from the molten metal, and because the temperature distribution varies widely, damage due to melting and spalling is severe, and the life of the bottom blowing nozzle is extremely short. Ta. On the other hand, in Example C where the aggregation rate exceeds the /da ratio, the heat balance on the nozzle becomes supercooled, resulting in an enlarged pine mushroom /θC and a pine mushroom 1
0c became unstable, and the strength of the nozzle itself was significantly reduced, resulting in a shortened lifespan.0 Now, when the stirring gas is bottom-blown using the bottom-blowing nozzle of the present invention mentioned above, the stirring gas becomes Since the air is blown evenly from almost the entire surface of the single nozzle, even a small amount of air can be
It becomes possible to obtain the stirring efficiency of the molten metal compared to the above. In addition, in the bottom blowing nozzle of the present invention, the cross-sectional area of the metal pipe 3 is 3θm.
Since it is r42 or less, the metal insertion phenomenon can be prevented even with a small amount of blowing, and it is possible to sufficiently control the blowing of a small amount.
而して本発明者等の経験では攪拌ガスの底吹き量を単体
ノズル７本あたり／θθθＮ＋＞＋７Ｈｒ以下とすると
単体ノズルの大きさを必要以上（て大きくすることなく
その吹込みが可能であり、しかも溶湯の↑Ｖ拌効率を低
下させることも全くなかった。従って単体ノズル／の大
きさが取扱性て優わ、だ適宜なもの匠できることからノ
ズルの製作が容易となり、その取替等の作業性が優れた
ものとなった。而して炉容が大きくなり底吹ガス量が／
θθθＮｒｒ？／Ｈｒ以上必要となる場合１ては、底吹
ノズルダを３個、もしくは２個以上の複゛数個設置すれ
ばよい。攪拌ガスとしては、ＣＯ２，Ａｒ＋ Ｎ２等を
用いることが可能である。しかしながら前記攪拌ガスＫ
ＣＯ２を用いると、吹込ガス量の２倍量のガスとなっ
て鋼浴攪拌に寄与するため（ＣＯ２＋ Ｃ−＋ 、２
ＣＯ）、ガス吹込設備としては同一冶金効果を得るため
のＡｒ、Ｎ２等に比し、小規模なもので良く、かつガス
の原単位、原単価の面で有利であるばかりでなくノズル
耐用的にみても吹込ガスが小さい分だけ有利となる。According to the experience of the present inventors, if the bottom blowing amount of stirring gas is set to less than /θθθN+>+7Hr per 7 single nozzles, it is possible to blow the stirring gas without increasing the size of the single nozzle more than necessary. Moreover, there was no reduction in the ↑V stirring efficiency of the molten metal.Therefore, the size of the single nozzle/ is superior in handling, and since the nozzle can be designed appropriately, it is easy to manufacture the nozzle, and its replacement etc. Workability has been improved.As a result, the furnace volume has become larger and the amount of bottom blowing gas has been reduced.
θθθNrr? If more than /Hr is required, three bottom blowing nozzles or two or more bottom blowing nozzles may be installed. As the stirring gas, CO2, Ar+N2, etc. can be used. However, the stirring gas K
When CO2 is used, the amount of gas becomes twice the amount of blown gas and contributes to steel bath stirring (CO2+ C-+, 2
Compared to Ar, N2, etc. to obtain the same metallurgical effect, the gas blowing equipment needs to be smaller, and is not only advantageous in terms of the gas consumption rate and unit cost, but also has a long lifespan of the nozzle. This is advantageous because the amount of blown gas is small.
又、前述のように正常なマツシュルーム／θが形成され
ていても、予期できない操業条件の変化、例えば底吹ガ
ス圧力を必要以上に小さくし、しかも長時間流量を絞っ
た状態等の操業によって、マンジルーム／θに形成され
たガス吹出口／／が閉塞する事態の生ずることがある。Furthermore, even if a normal pine mushroom/θ is formed as described above, unforeseen changes in operating conditions, such as lowering the bottom blowing gas pressure more than necessary and reducing the flow rate for a long period of time, may cause A situation may occur where the gas outlet// formed in the mange room/θ becomes blocked.
前記閉塞傾向がノズル先の圧力、流量特性の変化から検
出されたらＣ０２ｉ’？：０２を添加、混合することに
より、閉塞現象を解消することが可能となる。即ちＣＯ
２ＫＯ２を混合せしめることによってマツシュルーム自
体の燃焼、マンジ−ルームまわりの酸化発熱反応等によ
り閉塞傾向が解決される。０２の混合量が、５％未満で
は前述したマンジ−ルーム閉塞解除効果を発揮できず、
逆に３θチ超となると金属パイプ３やその周辺の耐火物
！を溶損せしめる危険性が大きくなるうえに攪拌ガス供
給設備Ｉて耐酸素性を考慮する必要があり、前述した攪
拌ガスＫＣＯ２を用いた効果が失われること！でなる。If the clogging tendency is detected from changes in the pressure and flow characteristics at the nozzle tip, C02i'? By adding and mixing :02, it becomes possible to eliminate the clogging phenomenon. That is, CO
By mixing 2KO2, the tendency of clogging can be solved by combustion of the pine mushroom itself, oxidative exothermic reaction around the mangee room, etc. If the mixing amount of 02 is less than 5%, the above-mentioned effect of unblocking the mangee room cannot be exhibited,
On the other hand, if it exceeds 3θ, the metal pipe 3 and its surrounding refractories! In addition to increasing the risk of melting and damaging the gas, it is necessary to consider the oxygen resistance of the stirring gas supply equipment I, and the above-mentioned effect of using the stirring gas KCO2 is lost! It becomes.
次に本発明の具体的な実施阻目でついて説明する。Next, specific implementation obstacles of the present invention will be explained.
第１表は／ｇθ屯転炉において低臭Ａｔギルド鋼を製造
し７たときの実施結果を示すものである。第１表の実施
結果からも明らかなように金属パイプ３の断面積が３０
ｍｍ２以下で、かつ集合率が９２９〜７９％の範囲の
ものでは、ノズルの溶損量がいずれもθ’ｌ ａｍ／Ｃ
Ｈ程度と、極めて少なかった。これに対し比較例／９，
２の如く金属パイプ３の断面積が３θ−２以下であって
も集合率φ；θ２グチ未満あるいは／ダチ超となると前
記溶損量は著しく増大したっ一方、攪拌ガスとしては香
拌効果の大きな差異は認められなかったがＣＯ２を用い
た本発明実施例／においてはＡｒあるいはＮ２を用いた
本発明実施例２゜３に対し、ガス原単位が約乙θチとな
り、その優れた効果が確認された。Table 1 shows the results of producing low odor At guild steel in a /gθtun converter. As is clear from the implementation results in Table 1, the cross-sectional area of the metal pipe 3 is 30
For those with a diameter of less than mm2 and an agglomeration rate in the range of 929 to 79%, the amount of erosion of the nozzle is θ'l am/C
It was extremely low, about H. On the other hand, comparative example/9,
Even if the cross-sectional area of the metal pipe 3 is less than 3θ-2 as shown in 2, when the agglomeration ratio φ is less than θ2 or exceeds 2, the amount of erosion increases significantly. Although no difference was observed, the gas consumption rate in Example 2 of the present invention using CO2 was approximately 2° compared to Example 2 of the present invention using Ar or N2, confirming its superior effect. It was done.
又、本発明実施例グ１（おいて閉塞傾向が検出されただ
め（て０２をコθ％混合せしめて底吹きを継続した結果
７６分後（では前記閉塞は完全【で解消された。In addition, although a clogging tendency was detected in Example G1 of the present invention, the clogging was completely eliminated after 76 minutes as a result of mixing θ% of 02 and continuing bottom blowing.
以上詳述したように本発明の実用的効果は極めて大であ
る。As detailed above, the practical effects of the present invention are extremely large.
第１図は本発明（で基づく底吹ノズルの一実施例を示す
断面構造図、第一図１ｒｉ第１図の平面図、第３図（イ
）、（ロ）、（ハ）は地金差し込み現象の発生しでよる
マツシュルームの剥離を説明するだめの構造図、第９図
は、集合率と形成されたマ、ンユルームおよびノズル内
温度分布の関係の調査結果を示す図、第５図は本発明実
施例へ、２．３． ｌｌ、 ５比較例へｊ戸吹ノズル断
面図、第６図は本発明実施例６の底吹ノズル断面図であ
る。
／：単体ノズル 、２：耐火物
３：金属パイプ グ：底吹集合ノズルｊ：羽目煉瓦
（底吹ノズル）６：炉底煉瓦壁 ７：
ガス供給管
と：ヘッダ一部 ９＝ノズル押え煉瓦／θ：マッシ
ュルーム ／／”、−１−１ス吹出ロイ゛ｒ＜Ｉｌ’ｉ
ゴ
（α）
（ハノ第５１′η
竺６ｒ７＋
一＋２０．ｊＯ。
’５−−− −２５０≠−門
手続補正書（自発）
昭オｕ５８年３月２６日
特許片長′ｇ 殿
１、＄件の表示
昭和５８年特訂願第２’７４３４号
２光明の名称
上底吹転′）Ｐ梢錬法
３補正をする省
知イ午との関保 特許出願人
任 Ｈ［米足部千代田区大手町２丁目６番３勺名 杯
代表者 武 １） 豊４代 理 人 −ｒ
−１０３置 ２４１−０４４１住 Ｈｌ 東京省Ｉ
Ｓ甲犬区Ｈ本橋不町１丁目１４首２号５、 ｎ＋止葡令
のＨ句 自発
６、＠正の対象
補正の内容
ｌ明細徊５頁下から２行目「浴に接する（！ＩＩＩの」
を門り除すめ。
２ヴ］細畳７買５行巨り「単体ノズル」を１−浴Ｖこ接
−ｆｆｌ’る側の単体ノズル−１に釘止する。Figure 1 is a cross-sectional structural diagram showing an embodiment of a bottom blowing nozzle based on the present invention, Figure 1 is a plan view of Figure 1, Figure 3 (A), (B), and (C) are bare metal. Fig. 9 is a diagram showing the structure of a nozzle explaining the separation of pine mushrooms due to the insertion phenomenon, and Fig. 9 is a diagram showing the investigation results of the relationship between the aggregation rate, the formed pine mushroom room, and the temperature distribution inside the nozzle. To Examples of the Invention, 2.3. ll, To 5 Comparative Examples j Cross-sectional view of the top blowing nozzle, Figure 6 is a cross-sectional view of the bottom blowing nozzle of Example 6 of the present invention. /: Single nozzle, 2: Refractory 3 ：Metal pipe gu：Bottom blowing collective nozzle j：Pain brick (bottom blowing nozzle) 6：Bottom brick wall 7：
Gas supply pipe: Part of header 9 = Nozzle holding brick / θ: Mushroom //'', -1-1 space blowout Royr<Il'i
Go (α)
(Hano No. 51'η 纺6r7+1+20.jO. '5--- -250≠- Gate procedural amendment (voluntary) March 26, 1982 Special Revision Application No. 2'7434 2 Komei's name upper bottom blown') No.6 3 name cup
Representative Takeshi 1) Yutaka 4th representative -r
-103 241-0441 Hl Tokyo I
S Koinu-ku H Motohashi Fumachi 1-14 No. 2 No. 5, n + H clause of the order, spontaneous 6, @ Positive subject correction content l Specification page 5, 2nd line from the bottom ``Touching the bath (!III of"
The gate is closed. 2V] Buy 7 narrow tatami mats, 5 rows, and nail the ``single nozzle'' to the single nozzle 1 on the 1-bath V connection-ffl' side.
Claims (3)
ダル／クチして単体ノズルを形成せしめた底吹集合ノズ
ルを用い流量／θθθＮｎ？／Ｈｒ・ノズル以下の攪拌
ガスを底吹きすることを特徴とする上底吹転炉精錬法。(1) Aggregation rate θββ of metal pipes with a cross-sectional area of 3θhu2 or less
Flow rate/θθθNn? using a bottom-blowing collective nozzle with dull/cropped edges to form a single nozzle. A top-bottom-blown converter refining method characterized by bottom-blowing stirring gas of less than /Hr nozzle.
する特許請求の範囲第１項記載の上底吹転炉精錬法０(2) Top-bottom blowing converter refining method 0 according to claim 1, characterized in that CO2 is used as the stirring gas.
を混合せしめた混合ガスを用いることを特徴とする特許
請求の範囲第１項記載の上底吹転炉精錬法。(3) CO2K 5-3θ 02 as stirring gas
The top-bottom blowing converter refining method according to claim 1, characterized in that a mixed gas containing the following is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2743483A JPS59153818A (en) | 1983-02-21 | 1983-02-21 | Refining process in top and bottom-blown converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2743483A JPS59153818A (en) | 1983-02-21 | 1983-02-21 | Refining process in top and bottom-blown converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59153818A true JPS59153818A (en) | 1984-09-01 |
Family
ID=12221002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2743483A Pending JPS59153818A (en) | 1983-02-21 | 1983-02-21 | Refining process in top and bottom-blown converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59153818A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS613817A (en) * | 1984-06-18 | 1986-01-09 | Kawasaki Steel Corp | Method for blowing gas into molten iron in steel making vessel |
| JPS6187810A (en) * | 1984-10-05 | 1986-05-06 | Kawasaki Steel Corp | Method for blowing gas into molten iron in refining vessel |
| CN102041347A (en) * | 2010-12-23 | 2011-05-04 | 秦皇岛首秦金属材料有限公司 | Method for synchronizing combined blowing and furnace age of converter |
| JP2016199788A (en) * | 2015-04-10 | 2016-12-01 | Ｊｆｅスチール株式会社 | Bottom-blown tuyere for converter |
| TWI630276B (en) * | 2016-09-02 | 2018-07-21 | 中國鋼鐵股份有限公司 | Method for controlling status of accretion formation in pyrometallurgical treatment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5811718A (en) * | 1981-07-15 | 1983-01-22 | Nippon Steel Corp | Bottom-blowing nozzle |
-
1983
- 1983-02-21 JP JP2743483A patent/JPS59153818A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5811718A (en) * | 1981-07-15 | 1983-01-22 | Nippon Steel Corp | Bottom-blowing nozzle |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS613817A (en) * | 1984-06-18 | 1986-01-09 | Kawasaki Steel Corp | Method for blowing gas into molten iron in steel making vessel |
| JPH0440407B2 (en) * | 1984-06-18 | 1992-07-02 | Kawasaki Steel Co | |
| JPS6187810A (en) * | 1984-10-05 | 1986-05-06 | Kawasaki Steel Corp | Method for blowing gas into molten iron in refining vessel |
| JPH0445564B2 (en) * | 1984-10-05 | 1992-07-27 | Kawasaki Steel Co | |
| CN102041347A (en) * | 2010-12-23 | 2011-05-04 | 秦皇岛首秦金属材料有限公司 | Method for synchronizing combined blowing and furnace age of converter |
| JP2016199788A (en) * | 2015-04-10 | 2016-12-01 | Ｊｆｅスチール株式会社 | Bottom-blown tuyere for converter |
| TWI630276B (en) * | 2016-09-02 | 2018-07-21 | 中國鋼鐵股份有限公司 | Method for controlling status of accretion formation in pyrometallurgical treatment |
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