JPS5952216B2 - How to replace the gas blowing nozzle - Google Patents
How to replace the gas blowing nozzleInfo
- Publication number
- JPS5952216B2 JPS5952216B2 JP6422479A JP6422479A JPS5952216B2 JP S5952216 B2 JPS5952216 B2 JP S5952216B2 JP 6422479 A JP6422479 A JP 6422479A JP 6422479 A JP6422479 A JP 6422479A JP S5952216 B2 JPS5952216 B2 JP S5952216B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- refractory material
- press
- hole
- tube
- 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.)
- Expired
Links
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Charging Or Discharging (AREA)
Description
【発明の詳細な説明】
この発明は、精錬炉において、その炉壁を通してガスを
浴面下に導入するための、例えば多種のガスを通す内管
と同心円状に配置された外管とを有する２重管ノズルの
交換方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a refining furnace which has an inner tube through which various types of gases can pass, and an outer tube arranged concentrically, for introducing gas below the bath surface through the furnace wall. This invention relates to a method for replacing a double tube nozzle.
例えば、転炉に上記の２重管を装着した場合、２重管ノ
ズルとその周囲の煉瓦積とをできるだけ均一に摩滅させ
ることが、転炉の寿命にとって最も重要である。For example, when a converter is equipped with the above-mentioned double pipes, it is most important for the life of the converter to wear out the double pipe nozzle and the surrounding brickwork as uniformly as possible.
ところが、実操業では、２重管ノズルとこれを直接囲繞
する煉瓦積は総じてこれ以外の煉瓦にくらべ多少早く摩
滅することが知られている。However, in actual operation, it is known that the double pipe nozzle and the brickwork directly surrounding it generally wear out somewhat faster than other bricks.
このため底吹転炉の場合、転炉を継続して使用する間に
１回ないし数回新しい炉底を挿設するのが通常である。For this reason, in the case of a bottom-blown converter, a new furnace bottom is usually inserted once or several times during continuous use of the converter.
この発明は、上記の煉瓦積を均一に摩滅させ、また、万
一尚早な摩滅が起った場合、ノズル交換のために炉を止
めることなくこれに対処しつるノズル交換法を提案する
ことを目的とするものである。This invention proposes a nozzle replacement method that uniformly wears out the brickwork described above and, in the event that premature wear occurs, it can be dealt with without stopping the furnace for nozzle replacement. This is the purpose.
すなわちこの発明は、精錬炉の炉壁を通してガスを浴面
下に導入するためのノズル交換において、炉壁に開孔し
た上記ノズルの外径より１０〜８０ｍｍ大きな内径の孔
とその孔に挿入した上記ノズルとの隙間に耐火モルタル
を圧入することを要旨とするものである。That is, in the nozzle replacement for introducing gas below the bath surface through the furnace wall of a refining furnace, this invention provides a hole with an inner diameter 10 to 80 mm larger than the outer diameter of the nozzle opened in the furnace wall, and a nozzle inserted into the hole. The gist of this is to press-fit refractory mortar into the gap between the nozzle and the nozzle.
以下にこの発明方法を詳述するため図面に示す一実施例
にもとづいて説明する。EMBODIMENT OF THE INVENTION Below, in order to explain this invention method in detail, it demonstrates based on one Example shown in drawing.
第１図に、精錬炉の耐火材中の２重管ノズルを示すよう
に例えば、転炉の炉底あるいは転炉の側壁の鉄皮１を通
して煉瓦積等の耐火材２中に、外管４と外管４内にそれ
より小径の同心管なる内管５とによって環状空間６を有
する２重管ノズル３を埋設する。Figure 1 shows a double pipe nozzle in the refractory material of a smelting furnace. A double tube nozzle 3 having an annular space 6 is embedded within the outer tube 4 and an inner tube 5 which is a concentric tube having a smaller diameter.
外管４．内管５はそれぞれ独立したスリット部ガス導入
管７．内管ガス導入管８を介して、アルゴン、キセノン
、クリプトンのような不活性ガス、窒素、一酸化炭素の
ような中性ガス、二酸化炭素、酸素のような酸化性ガス
のうち１種又は２種以上のガスを供給する。Outer tube 4. Each inner tube 5 has an independent slit portion gas introduction tube 7. Through the inner gas inlet pipe 8, one or two of inert gases such as argon, xenon, and krypton, neutral gases such as nitrogen and carbon monoxide, and oxidizing gases such as carbon dioxide and oxygen are supplied. Provides more than one species of gas.
このような、炉壁を通しガスを浴面下に導入するための
、ノズルを使用して、２重管ノズル３を直接囲繞する耐
火材２が残余の耐火材よりも速く摩滅損傷して、漏斗状
凹部９を形成した場合、これを補修する方法として、耐
火材２の損傷のないレベルまで２重管ノズル３を押し進
め、その後漏斗状凹部９を注入、塗布あるいはスタンピ
ングなどで充填することができるが、２重管ノズル３を
押し進めたために、外管４と耐火材２との間に隙間が生
じ、上記漏斗状凹部の充填のみでは、この隙間からの溶
鋼もれの危険性がある。When such a nozzle is used to introduce gas below the bath surface through the furnace wall, the refractory material 2 directly surrounding the double pipe nozzle 3 is worn out faster than the remaining refractory material, and When a funnel-shaped recess 9 is formed, a method for repairing it is to push the double pipe nozzle 3 to a level that will not damage the refractory material 2, and then fill the funnel-shaped recess 9 by injection, coating, stamping, etc. However, since the double tube nozzle 3 is pushed forward, a gap is created between the outer tube 4 and the refractory material 2, and if only the funnel-shaped recess is filled, there is a risk of molten steel leaking from this gap.
そこで、耐火材２中に漏斗状凹部９が形成されると、新
しい２重管ノズル３と交換し、溶鋼もれが起らないよう
に、外管４と耐火材２との隙間を充填するのがよい。Therefore, when a funnel-shaped recess 9 is formed in the refractory material 2, it is replaced with a new double pipe nozzle 3, and the gap between the outer tube 4 and the refractory material 2 is filled to prevent molten steel from leaking. It is better.
この２重管ノズル３の交換時期の決定は、レーザー光線
等を利用して光学的に漏斗状凹部９を測定することによ
り決定できるが、炉外より内管５を通して炉内にＬ字形
に曲げた針金等の部材を挿通することにより測定できる
。The time to replace the double tube nozzle 3 can be determined by optically measuring the funnel-shaped recess 9 using a laser beam or the like. It can be measured by inserting a member such as a wire.
すなわち、炉内に開口した２重管ノズル３の先端部に部
材のＬ字形の部位を掛け、該ノズル３の開口部から鉄皮
１までの距離を測ることにより交換時期を決定すること
ができる。That is, the replacement time can be determined by hanging the L-shaped part of the member over the tip of the double pipe nozzle 3 that opens into the furnace and measuring the distance from the opening of the nozzle 3 to the steel shell 1. .
このようにして、２重管ノズル３の交換時期が決まると
、２重管ノズル３を耐火材２内より引き抜き後の耐火材
２中の孔にそって、２重管ノズル３の外径より１０〜８
０ｍｍ大きな内径の孔を穿設する。In this way, when the time to replace the double tube nozzle 3 is determined, the double tube nozzle 3 is pulled out from inside the fireproof material 2, and along the hole in the fireproof material 2, from the outside diameter of the double tube nozzle 3. 10-8
Drill a hole with a 0mm larger inner diameter.
もちろん、引き抜き後の孔を耐火材料で充填し、全く別
の位置に新たな孔を穿設することもできる。Of course, it is also possible to fill the hole after being pulled out with a refractory material and drill a new hole at a completely different location.
ここで、穿設した孔の内径が２重管ノズル３の外径より
１０ｍｍ未満しか大きくない場合には、下述する耐火材
料の圧入が十分性なえず、該ノズル３の外径よ’） ８
０ｍｍ以上大きい場合は、耐火材料の圧入は出来るが、
多量の耐火材料を必要とし不経済であるばかりでなく、
充填した耐火材料の乾燥に時間を要する。Here, if the inner diameter of the drilled hole is less than 10 mm larger than the outer diameter of the double pipe nozzle 3, the press-fitting of the refractory material described below will not be sufficient, and the outer diameter of the nozzle 3 will be larger than the outer diameter of the nozzle 3. ) 8
If it is larger than 0mm, it is possible to press-fit fireproof material, but
Not only is it uneconomical as it requires a large amount of refractory material, but
It takes time to dry the filled refractory material.
なお、新しい管を挿入する際には、ノズル３先端開口部
を分離可能な蓋１２で閉じ、異物等の侵入を防止し、ガ
ス吹込みに際して上記蓋を離脱するか、あるいは、高温
金属の影響によって蓋を破損する。When inserting a new tube, close the opening at the tip of the nozzle 3 with a removable lid 12 to prevent foreign matter from entering, and remove the lid when blowing gas, or avoid the effects of high temperature metal. damage the lid.
この蓋には通常、鋼浴の熱により容易に焼失する厚紙が
使用される。This lid is usually made of cardboard, which is easily burned away by the heat of the steel bath.
次に第２図のこの発明方法の説明図に示すように、新し
い２重管ノズル３を上述した内径とする孔に遊挿するに
際し、該ノズル３が孔の中心に挿置するように、中心に
２重管ノズルの貫通孔を有する花形の耐火物板１１を取
り付ける。Next, as shown in the explanatory diagram of the method of this invention in FIG. 2, when a new double pipe nozzle 3 is loosely inserted into the hole having the above-mentioned inner diameter, the nozzle 3 is inserted in the center of the hole. A flower-shaped refractory plate 11 having a through hole for a double pipe nozzle in the center is attached.
耐火物板１１を花形にすることにより、耐火材料１０の
圧入に際して、該孔と耐火物板１１の隙間より気体を孔
外に逃がすことができる。By making the refractory plate 11 flower-shaped, gas can escape from the hole through the gap between the hole and the refractory plate 11 when the refractory material 10 is press-fitted.
ここで、２重管ノズル３は耐火材２の損傷のないレベル
まで押し進めておく必要がある。Here, it is necessary to push the double pipe nozzle 3 to a level where the refractory material 2 is not damaged.
以上のごとく、新しいノズル３を耐火材２中の孔の中心
部に挿置すると、下述する耐火材料１０の圧入機で鉄皮
１側より耐火材料１°０を圧入すｉる。As described above, when the new nozzle 3 is inserted into the center of the hole in the refractory material 2, the refractory material 1°0 is press-fitted from the steel skin 1 side using the press-in machine for the refractory material 10 described below.
この圧入する耐火材料１０は、高炉の出鉄口の閉鎖に用
いられりアルミナとシリカの混合物にタールを混ぜたタ
ールボタ、マグネシアペースト、高アルミナモルタルな
ど、通常用いられる耐火モルタルでもよい。The refractory material 10 to be press-fitted may be a commonly used refractory mortar, such as tarbot, magnesia paste, or high alumina mortar, which is used to close the outlet of a blast furnace and is a mixture of alumina and silica mixed with tar.
１ 耐火材料１０の圧入機１３は、第３図に示すごとく
、フレーム１４はその後部に油圧シリンダ１５を固設し
、そのピストン１６が摺動可能なように耐火材料圧入筒
１７を内設する。1. As shown in FIG. 3, the press-fitting machine 13 for refractory material 10 has a frame 14 with a hydraulic cylinder 15 fixedly installed at the rear thereof, and a refractory material press-fitting cylinder 17 installed therein so that its piston 16 can slide. .
この圧入筒１７は、炉壁又は炉底内に先端を挿入した鉄
皮フラ；ンジ１９で位置決めされる圧入ノズル１８とそ
れぞれのフランジ部１７ａ、１８ａで連結しである。This press-fit tube 17 is connected to a press-fit nozzle 18, which is positioned by a steel flanged flange 19 whose tip is inserted into the furnace wall or furnace bottom, through respective flanges 17a and 18a.
この圧入機１３は耐火材料圧入筒１７内の耐火材料１０
をピストン１６によって圧入ノズル１８よりノズル３の
外管４と耐火材２との隙間に圧１人する。This press-fitting machine 13 presses the refractory material 10 in the refractory material press-fitting cylinder 17.
is applied to the gap between the outer tube 4 of the nozzle 3 and the refractory material 2 from the press-fit nozzle 18 by the piston 16.
なお、圧入に際し、２重管ノズル３の炉外開口部にシー
リングケース２０を嵌合させ耐火材料１０が該ノズル３
内に侵入しないようにする。In addition, when press-fitting, the sealing case 20 is fitted to the opening outside the furnace of the double tube nozzle 3, and the refractory material 10 is inserted into the nozzle 3.
Prevent it from entering inside.
このように、外管４と孔との隙間に耐火材料１７０を圧
入した後、先に２重管ノズルは耐火材２の損傷のないレ
ベルまで押し進められているので、漏斗状凹部９を通常
の焼付剤によって充填して完了する。In this way, after press-fitting the refractory material 170 into the gap between the outer tube 4 and the hole, the double tube nozzle has been pushed forward to a level where the refractory material 2 is not damaged, so the funnel-shaped recess 9 is Complete by filling with baking agent.
上述のごとく、この発明によるガス吹込用ノズデルの交
換方法は、このノズルを運転外に置くことなく、万一尚
早な摩滅が起ってもこれに対処し得るすぐれた交換方法
である。As described above, the method of replacing a gas blowing nozzle according to the present invention is an excellent method for replacing the nozzle in the event that it wears out prematurely, without leaving the nozzle out of operation.
第１図は耐火材とノズルが損傷した状態を示す９精錬炉
の平面図と縦断面図、第２図はこの発明によるノズルの
交換に際し耐火材料の圧入状態を示す精錬炉の平面図と
縦断面図、第３図は耐火材料圧入機の縦断面図である。
図中１・・・・・・鉄皮、２・・・・・・耐火材、３・
・・・・・２重管ノズル、４・・・・・・外管、５・・
・内管、９・・・・・・漏斗状凹部、１０・・・・・・
耐火材料、１１・・・・・・花形耐火物板、１３・・・
・・・圧入機、１５・・・・・・シリンダ、１７・・曲
圧入筒、１８・・・・・・圧入ノズル、２０・・・・・
・シーリングケース。Fig. 1 is a plan view and a vertical sectional view of a refining furnace 9 showing a state in which the refractory material and nozzle are damaged, and Fig. 2 is a plan view and a longitudinal sectional view of the smelting furnace showing a state in which refractory material is press-fitted when replacing the nozzle according to the present invention. The plan view and FIG. 3 are longitudinal cross-sectional views of the refractory material press-in machine. In the diagram: 1... Iron shell, 2... Fireproof material, 3...
...Double tube nozzle, 4...Outer tube, 5...
・Inner tube, 9...funnel-shaped recess, 10...
Fireproof material, 11... Flower-shaped refractory board, 13...
...Press-fit machine, 15...Cylinder, 17...Curved press-fit tube, 18...Press-fit nozzle, 20...
- Sealing case.
Claims (1)
のノズルの交換において、炉壁に開孔した上記ノズルの
外径より１０〜８０ｍｍ大きな内径の孔とその孔に挿入
した上記ノズルとの隙間に耐火モルタルを圧入すること
を特徴とするガス吹込用ノズルの交換方法1. When replacing a nozzle for introducing gas below the bath surface through the furnace wall of a refining furnace, a hole with an inner diameter 10 to 80 mm larger than the outer diameter of the nozzle opened in the furnace wall and the nozzle inserted into the hole. A gas blowing nozzle replacement method characterized by press-fitting refractory mortar into the gap between
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6422479A JPS5952216B2 (en) | 1979-05-24 | 1979-05-24 | How to replace the gas blowing nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6422479A JPS5952216B2 (en) | 1979-05-24 | 1979-05-24 | How to replace the gas blowing nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55158240A JPS55158240A (en) | 1980-12-09 |
| JPS5952216B2 true JPS5952216B2 (en) | 1984-12-18 |
Family
ID=13251910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6422479A Expired JPS5952216B2 (en) | 1979-05-24 | 1979-05-24 | How to replace the gas blowing nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5952216B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996037632A1 (en) * | 1995-05-25 | 1996-11-28 | Japan Casting & Forging Corporation | Nozzle for blowing gas into molten metal and usage thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058761B2 (en) * | 1981-04-14 | 1985-12-21 | 川崎製鉄株式会社 | Method for repairing the bottom of a converter with a bottom blowing tuyere |
-
1979
- 1979-05-24 JP JP6422479A patent/JPS5952216B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996037632A1 (en) * | 1995-05-25 | 1996-11-28 | Japan Casting & Forging Corporation | Nozzle for blowing gas into molten metal and usage thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55158240A (en) | 1980-12-09 |
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