JPS59223156A - Initial hole opening method of vessel for molten metal - Google Patents

Abstract

PURPOSE:To improve reliability of prompt hole openability and cleanability of a molten steel by releasing the refractory plug inserted into the upper nozzle hole on a device for adjusting the flow rate of the molten steel together with a piston into the vessel by the pressure of high pressure gas. CONSTITUTION:A high pressure gas introducing port is punched in a moving plate 1-1 of a sliding nozzle 1 and a cylinder 6 and a refractory plug 7 are disposed in a stationary plate 1-2 and an upper nozzle 2 above said port. The vertical movement of a cylinder pipe 6-2 is restrained by plates 1-1, 1-2 engaged with the bottom flange of said pipe. When a high pressure gaseous source 8 is communicated with the introducing port prior to charging of the molten steel after receiving of the steel- secondary refining process, the pressure in the pipe 6-2 is hermetically closed by a seal and therefore the pressure rises sharply and the piston 6-1 is pressed onto the bottom surface of the plug 7 to transmit the cylinder thrust thereto. When the thrust attains the resistance of the plug 7, the plug 7 begins to float and the plug 7 and the piston 6-1 float acceleratively with a decrease in the resistance and are released into a pan 0. Since the gaseous pressure decreases sharply in this stage, the plate 1-1 is moved to an open position upon detection of said decrease to start charging the molten steel.

Description

【発明の詳細な説明】 本発明は、溶融金属容器の初期開孔方法に関す一般に、
造塊作業等に於る溶融金属容器からの切出しく注入）初
期の信頼性確保は品質・工程管理上重要であるが、特に
溶鋼の場合、高温・品質管理の厳格さという点で更に高
い信頼性の確保が要求さ扛る。DETAILED DESCRIPTION OF THE INVENTION The present invention generally relates to a method for initially opening a molten metal container.
Ensuring initial reliability is important for quality and process control (cutting and pouring from a molten metal container during ingot making work, etc.), but especially in the case of molten steel, even higher reliability is required in terms of high temperature and strict quality control. Securing sex is required.

以上の点を踏まえ、以下、溶鋼に即して説明する。Based on the above points, explanation will be given below based on molten steel.

従来法に於る溶鋼鍋の初期開孔方法としては第１図に示
すように、溶鋼流量調整装置（以下スライディングノズ
ル、略してＳＮという）ｌ上の上ノズル２、羽口煉瓦３
内に、主に砕砂から構成さｎる詰物５を投入し、以後の
受鋼〜注入作業に至る間の溶鋼のシール及び保温を行い
、注入時の８Ｎ開稜の即時開孔性を期している。As shown in Fig. 1, the conventional method for initially opening a hole in a molten steel ladle is as shown in Fig. 1.
A filler 5 consisting mainly of crushed sand was put into the molten steel to seal and keep warm the molten steel during the subsequent steel receiving and pouring operations, in order to ensure immediate opening of the 8N ridge at the time of pouring. There is.

しかし力からこの方法によると、即時開孔率が９７〜８
チと低く、不開孔時には酸素による開孔処置が必要とガ
るため、溶鋼酸化による品質劣化、操業スケジュールへ
の支障を招く、更に、２０〜３０Ｋｐの詰物自身が次工
稈のタンディツシュ乃至モールドに流出、懸濁し品質上
問題である。However, due to the force, using this method, the immediate opening rate is 97 to 8.
If the hole does not open, it will be necessary to open the hole with oxygen, resulting in quality deterioration due to oxidation of the molten steel and disruption to the operation schedule. It leaks and becomes suspended, which is a quality problem.

本発明は、上記従来法の欠点を完全に排除したものであ
り、本発明によ扛ば、即時開孔性の信頼性、及び溶鋼清
浄性を向上することができる。The present invention completely eliminates the drawbacks of the above-mentioned conventional methods, and according to the present invention, the reliability of instant hole opening and the cleanliness of molten steel can be improved.

即ち、本発明は、上ノズルの下部に摺動式流量調整製雪
を接続配置し、上ノズル孔に嵌挿したシリンダーの下部
に高圧ガスを導入し、その圧力によりシリンダーに嵌合
したピストン及び上ノズル上部に上部から嵌入した耐火
物栓を溶融金属容器内に放出し、しかる後、前記摺動式
流量調整装置を開位置に動作させ溶融金属を流出させる
ことを特徴とする溶融金属容器の初期開孔方法を要旨と
するものである。That is, the present invention connects and arranges a sliding flow rate adjustment snowmaker to the lower part of the upper nozzle, introduces high pressure gas into the lower part of the cylinder fitted into the upper nozzle hole, and uses the pressure to control the piston and the cylinder fitted into the cylinder. A molten metal container characterized in that a refractory stopper fitted into the upper nozzle from above is discharged into the molten metal container, and then the sliding flow rate adjusting device is operated to an open position to cause the molten metal to flow out. The gist is the initial hole opening method.

本発明を添付図面に関連させてその実施例について更に
説明す扛ば次の通りである。Embodiments of the present invention will now be further described with reference to the accompanying drawings.

第２図は、本発明に係る方法を実施するための初期開孔
装置の概略断面図である。ＳＮＩの移動プレー）１−１
内に高圧ガス導入口１−１−１が穿か−ｎ、当該穴は高
圧ガス供給源（アルザンヂンベ）８と導通可能にせしめ
である。また、高圧ガス導入口１−ｔ−を上にシリンダ
ー６、および耐火物栓７が、固定プレー）１−２および
上部ノズル２内に配置される。ここでシリンダー６はシ
リンダーチューブ６−２％ピストン６−１から構成さｎ
、該チューブ６−２下面にはフランジ６−２−３が張出
し、固守プレート段付面１−２−１と係合し、移動・固
定画プレート１−１．１−２により上下を拘束さし、ピ
ストン６−１の摺動抵抗に抗し、シール６−２−２のシ
ール面隙間を一定にしてシール性を保証すると共に、開
孔稜のシリンダーチューブ６−２の落下防止を兼ねてい
る。FIG. 2 is a schematic cross-sectional view of an initial drilling device for carrying out the method according to the invention. SNI's mobile play) 1-1
A high-pressure gas inlet 1-1-1 is bored in the inside, and the hole is made to be able to communicate with a high-pressure gas supply source (alzanjinbe) 8. Further, a cylinder 6 and a refractory plug 7 are arranged in the fixed plate 1-2 and the upper nozzle 2 with the high-pressure gas inlet 1-t- placed above. Here, the cylinder 6 is composed of a cylinder tube 6-2% and a piston 6-1.
, a flange 6-2-3 protrudes from the lower surface of the tube 6-2, engages with the fixed plate stepped surface 1-2-1, and is restrained from above and below by the movable/fixed image plate 1-1.1-2. It resists the sliding resistance of the piston 6-1, keeps the seal surface gap of the seal 6-2-2 constant to ensure sealing performance, and also serves to prevent the cylinder tube 6-2 from falling at the edge of the opening. There is.

圧力保持用の耐熱シール装置として、前述の移動プレー
ト〜チューブ間用シール６−２−２　ト、ピストン〜チ
ューブ間用シール６−１−１が配置さ扛る。耐火物栓７
は、溶鋼の洩ｎ防止、地金付着軽減及びシリンダ一部淵
度上昇軽減の為に設けら′ｎ、上ノズル２に倍大さｆ％
不定形耐火物により密着せしめらｎる。As heat-resistant seal devices for maintaining pressure, the aforementioned moving plate-to-tube seal 6-2-2 and piston-to-tube seal 6-1-1 are arranged. Refractory plug 7
is provided to prevent leakage of molten steel, reduce adhesion of base metal, and reduce the rise in depth of some parts of the cylinder.
Closely bonded with monolithic refractories.

次に、上記構成になる装置による本発明方法の実施を詳
細に謂明する。Next, implementation of the method of the present invention using the apparatus configured as described above will be explained in detail.

第２図の如く、造塊場にて組付し、受鋼〜２次精錬処理
後注入前に、高圧ガスノ々ルプｓ　−１ヲ介して高圧ガ
ス配管８−２により、高圧ガス導入口１−１−１と高圧
ガス供給源８とを連辿し５次いで高圧ガスノ々ルブ８−
１を開作動させると、シリンダーチューブ６内圧力は、
シール６−２−２゜６−１−１により密閉されているた
め急上昇し。As shown in Fig. 2, after the steel is assembled at the ingot mill, and before injection after the steel receiving and secondary refining processes, the high pressure gas pipe 8-2 is connected to the high pressure gas inlet 1 through the high pressure gas nozzle S-1. -1-1 and high-pressure gas supply source 8, and then high-pressure gas nozzle 8-
1 is opened, the pressure inside the cylinder tube 6 is
It rises rapidly because it is sealed by seal 6-2-2゜6-1-1.

ピストン６−１は耐火物栓７下面に押しつけらｎシリン
ダー推力をとれに伝達する。そして耐火物栓７の抵抗（
溶鋼静圧力、耐火物接触面摩擦乃至剪断力、付着地金剪
断力）に推力が達した時点で耐火物栓７は浮上し始め、
抵抗の低減と共に、耐火物栓７．ピストン６−１は高圧
ガスの膨張により加速浮上し、鍋内０に放出さｎる。そ
の時点で、ガス圧力は急激に低下するので、こｔを検知
して、ＳＮＮ移動ブレート−１を開位置に移動すること
により注入作業が開始さｎる。この間も高圧ガスは吹込
まれるので、溶鋼のガス導入口１−１−１への流出はな
く、移動プレート１−１が移動してガス導入口１−１−
１が固定プレート１−２により遮断さｎた時点に於て圧
力が上昇するので、と牡を検知して高圧ガスノ々ルブ８
−１は全閉にされる。The piston 6-1 is pressed against the lower surface of the refractory stopper 7 and transmits the n-cylinder thrust to the piston. And the resistance of the refractory plug 7 (
When the thrust reaches the static pressure of the molten steel, the friction or shearing force of the contact surface of the refractory, and the shearing force of the adhered metal, the refractory plug 7 begins to float,
With reduced resistance, refractory plug 7. The piston 6-1 accelerates to the surface due to the expansion of the high-pressure gas and is ejected into the pot. At that point, the gas pressure drops rapidly, so this is detected and the injection operation is started by moving the SNN moving plate-1 to the open position. During this time, high pressure gas is also blown in, so the molten steel does not flow out to the gas inlet 1-1-1, and the movable plate 1-1 moves to move the molten steel to the gas inlet 1-1-1.
1 is shut off by the fixed plate 1-2, the pressure rises, and the high pressure gas nozzle 8 is detected.
-1 is fully closed.

一方、残存するシリンダーチューブ６−２は溶鋼通過に
より短時間で溶解消滅さｎ、注入作業に影響を与えるこ
とはない。On the other hand, the remaining cylinder tube 6-2 melts and disappears in a short time as the molten steel passes through, and does not affect the pouring operation.

ところで、耐火物栓７を鍋内Ｏにガス圧で放出するため
には抵抗Ｒと推力Ｆは次式を満す必要がある。By the way, in order to discharge the refractory stopper 7 into the pot O with gas pressure, the resistance R and the thrust force F need to satisfy the following equation.

ＤＵ；耐火物栓上面直径 ＤＬ；　　　ｐ　　　下面直径（＝シリンダー径）Ｐｓ
；溶鋼静圧、Ｐ；ガス圧力 ＬＢ；耐火物栓密着部高さ、”ｊ８　；付着地金高さＳ
Ｂ；耐火物栓密着部破壊応力 ８ｓ；付着地金破壊応力 ここで、ＤＩ、＝０．７ＤＵと形状を仮定し、融点近傍
であるからｓＢ十〇とすると ２−０４Ｐ８＋８−１６ＬＢＳＢ／ＤＵ　（Ｐと彦る。DU: Refractory plug top diameter DL; p Bottom diameter (= cylinder diameter) Ps
; Static pressure of molten steel, P; Gas pressure LB; Height of refractory plug contact area, "j8; Height of adhered metal S
B: Breaking stress of refractory plug adhesion part 8s; Breaking stress of attached metal Here, assuming the shape as DI = 0.7DU, and since it is near the melting point, sB is 10, then 2-04P8+8-16LBSB/DU (P That's what I thought.

上式より溶鋼鍋に適用する場合、耐火物の抵抗が無い理
想状態に於てもＰ≦５＃／−が必須であり、耐火物抵抗
を考慮するとＰ≧１０ｋｙ／−が妥当である。この高圧
ガス圧力では、単純に耐火物で構成されるものでは、圧
力保持が困難であシ、かつ耐火物強度の面で破損が懸念
さｎる。故に、本発明では、機械加工により精緻に管理
さ扛、強度的にも保証さｎ推力の保証が可能なシリンダ
ーを耐火物栓下面に配置することが必要である。ここで
、ガスの種類は、溶鋼に影響を与えないアルノンが望ま
しい、その他火薬等の燃焼ガスにより圧力を確保するこ
とも考えらｎるが、安全温度の管理が困難な事と、繰返
しが利か力い点に問題があり、外部よりの高圧ガス導入
が最も合理的と考えらｎる。その他、耐火物栓７が塊状
であるのは。According to the above formula, when applied to a molten steel ladle, P≦5#/- is essential even in an ideal state where there is no resistance of the refractory, and P≧10ky/- is appropriate when considering the resistance of the refractory. At this high gas pressure, it would be difficult to maintain the pressure if the refractory is simply made of refractory material, and there is a concern that the refractory material may be damaged due to its strength. Therefore, in the present invention, it is necessary to arrange a cylinder on the underside of the refractory plug, which can be precisely controlled by machining, ensure strength, and guarantee n thrust. Here, as for the type of gas, it is preferable to use alnon, which does not affect the molten steel.It is also possible to secure the pressure with combustion gas such as explosives, but it is difficult to control the safe temperature and it is difficult to repeat the process. There is a problem with the strength, and it is considered most rational to introduce high-pressure gas from the outside. Another reason is that the refractory plug 7 is in the form of a block.

溶鋼中での浮上性が高く開孔に伴って発生する注入流に
巻込まれることがなく、又、ｉ濁の危険性も無いことに
ある。It has high buoyancy in molten steel and does not get caught up in the injection flow that occurs when holes are opened, and there is no risk of turbidity.

次に、溶融金属流量調整装廿は、前記実施例で示したス
ライディングノズル式や、ロータリ一式を問わす摺動式
のものであｎば良く、該方式のものでは作動途中での地
金詰りが無い、又、耐火物栓７放出以後、移動プレート
１−１は短時間（例えば数秒程度）に開にすることが地
金による詰り防止上必要である。Next, the molten metal flow rate adjustment device may be a sliding nozzle type as shown in the above embodiment or a sliding type such as a rotary set. Furthermore, after the refractory stopper 7 is released, it is necessary to open the movable plate 1-1 within a short period of time (for example, within a few seconds) to prevent clogging with metal.

その他、高圧ガス導入口１−１−１は、移動プレートｌ
−１の耐火物に穿孔し、平坦度を保証しているが、同−
形状金属材質品の耐火物移動プトトへの接合による方法
をも可能である。この場合、耐圧強度は強くなり高圧力
が保証できるが、耐火１物移動プレートとの接合部平坦
度確保が困難である。In addition, the high pressure gas inlet 1-1-1 is connected to the moving plate l.
-1 refractories are perforated to ensure flatness, but the same -
It is also possible to join a shaped metal product to a refractory transfer plate. In this case, the pressure resistance is strong and high pressure can be guaranteed, but it is difficult to ensure the flatness of the joint with the refractory single object moving plate.

シリンダーチューブ６−２、ピストン６−１ｆｌ軽量（
１〜２　Ｋｙ　）の為、溶鋼を汚染することは余り考え
られないが、材質的に溶鋼成分系との整合性を取るのが
望ましい。又、ピストン６−１は溶鋼中に高圧ガスの吐
出圧、膨張により放出されるので中空、比重の小さい材
質がどによる嵩比重の低減による浮上性の向上が開孔性
の信頼性向上のためには、望ましい、また、ピストン部
のシール６−１−１．チューブ下面シール６−２−２は
、温度、圧力によりノぐツキン材質、構造が選定さｎる
。Cylinder tube 6-2, piston 6-1fl lightweight (
1 to 2 Ky), so it is unlikely that the molten steel will be contaminated, but it is desirable that the material be consistent with the molten steel composition system. In addition, since the piston 6-1 is discharged into the molten steel by the discharge pressure and expansion of high-pressure gas, it is hollow and made of a material with low specific gravity, which improves buoyancy due to the reduction in bulk specific gravity, which improves the reliability of hole opening. It is also desirable for the piston section seal 6-1-1. The sealing material and structure of the tube bottom seal 6-2-2 are selected depending on the temperature and pressure.

耐火物栓７の材質は、地金付着防止、シリンダ一部温度
上昇低減のために、シャモット、ロー石等断熱能の高い
材質が望ましい、形状、取付方法は。The material of the refractory stopper 7 is preferably a material with high heat insulation capacity, such as chamotte or low stone, in order to prevent metal adhesion and to reduce the temperature rise in a part of the cylinder.The shape and installation method are as follows.

上ノズル２の形状とも関連するが％撲形と上部不定形耐
火物による密着の組合せがシール性１強度上望ましい。Although it is related to the shape of the upper nozzle 2, a combination of a square shape and close contact by the upper monolithic refractory is desirable in terms of sealing performance and strength.

以上の本発明法によｎば、溶鋼静圧、耐火物。According to the above-described method of the present invention, static pressure of molten steel and refractories can be obtained.

地金の抵抗に見合った設定が容易で、設定圧力不足時に
も設定替えにより再度開孔作動させることが可能で即応
性がある。′！！＋た。他容器（例えばタンディツシュ
）への適用も簡易である。特に、シリンダー推力を事前
に単体で検証できるため、推力の保証が可能であり、即
時開孔性の信頼性が高く、極く短時間（５〜６　ｓｅｃ
　）で開孔するため時間管理が容易であることは有益で
ある。また、耐火物栓は鍋内に塊状で放出、浮上するた
め溶鋼汚染の危険性もない、その他、シリンダーセット
後も８Ｎの作動に干渉せず、事前のＳＮプレート開度点
検もできるため、高精度ＳＮプレート制御時にも適用で
きる他、上ノズル等鍋内耐大物に対し圧力開放後の低圧
時にのみ圧力が加わるため割ｎの危険性も々く安全であ
る。更に設備、運転費用も低置で工業的利用価値の高い
発明である。It is easy to set the setting to match the resistance of the base metal, and even if the set pressure is insufficient, it is possible to restart the hole drilling operation by changing the settings, providing quick response. ′! ! +ta. Application to other containers (for example, tundish) is also simple. In particular, since the cylinder thrust can be verified individually in advance, it is possible to guarantee the thrust, and the reliability of immediate hole opening is high, and it can be completed in an extremely short time (5 to 6 seconds).
) It is advantageous that time management is easy because the holes are drilled at In addition, the refractory plug is discharged and floats in the pot in the form of a lump, so there is no risk of molten steel contamination.In addition, it does not interfere with the operation of the 8N even after the cylinder is set, and the SN plate opening can be checked in advance, making it highly efficient. In addition to being applicable to precision SN plate control, it is also extremely safe since pressure is applied to large objects in the pot, such as the upper nozzle, only when the pressure is low after the pressure is released. Furthermore, the equipment and operating costs are low, making the invention highly valuable for industrial use.

以下に実施の具体例を示す。A specific example of implementation is shown below.

・耐火物栓受圧面積：５７−１溶鋼静圧；１．９６Ｋｇ
／ｅＩＩ ・シリンダー径φ６３ ・高圧ガス；アルノン、設定圧カニ　２０　Ｋｙ／ｃｄ
・材質；シリンダー；鋼、ピストン部シール；鋳鋼ピス
トンリング、下部シール；７ツｙ−７ム ・制御（第３図参照）・Refractory plug pressure receiving area: 57-1 Molten steel static pressure: 1.96Kg
/eII ・Cylinder diameter φ63 ・High pressure gas; Alnon, set pressure crab 20 Ky/cd
・Material: Cylinder: Steel, Piston seal: Cast steel piston ring, Lower seal: 7Y-7M・Control (see Figure 3)

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来法（詰物法）の概要を説明する断面図、 第２図は本発明方法を実施するための製画の概略を説明
する断面図。 第３図は本発明具体例における制御の状況を示す線図で
ある。 Ｏ：溶融金属容器、ｌ二流量調整装置、２：上ノズル、
３：羽口煉瓦、４：鉄皮、５：詰物、６：シリンダー、
７：耐火物栓、８：高圧ガス供給源。 代理人　弁理士　　秋　沢　政　光 信　　２　　名 寸　　　　　＼ １寸　　　　　＼FIG. 1 is a sectional view illustrating the outline of the conventional method (filling method), and FIG. 2 is a sectional view illustrating the outline of drawing for carrying out the method of the present invention. FIG. 3 is a diagram showing the control situation in a specific example of the present invention. O: molten metal container, l2 flow rate adjustment device, 2: upper nozzle,
3: Tuyere brick, 4: Iron shell, 5: Filling, 6: Cylinder,
7: Refractory plug, 8: High pressure gas supply source. Agent Patent attorney Masaaki Akizawa Mitsunobu 2 names ＼ 1 sun ＼

Claims (1)

【特許請求の範囲】[Claims] （１）　　上ノズルの下部に摺動式流量調整装置を接続
配置し、上ノズル孔に嵌挿したシリンダーの下部に高圧
ガスを導入し、その圧力によシシリンダーに嵌合したピ
ストン及び上ノズル上部に上部から嵌入した耐火物栓を
溶融金属容器内に放出し、しかる彼、前記摺動式流量調
整装置を開位置に動作させ溶融金属を流出させることを
特徴とする溶融金属容器の初期開孔方法。(1) A sliding flow rate adjustment device is connected to the lower part of the upper nozzle, high-pressure gas is introduced into the lower part of the cylinder fitted into the upper nozzle hole, and the pressure causes the piston fitted to the cylinder and the upper nozzle. Initial opening of a molten metal container, characterized in that a refractory plug fitted into the upper part is discharged into the molten metal container, and then the sliding flow rate regulating device is operated to an open position to allow the molten metal to flow out. hole method.