JPH02235557A - Method for charging adding metal for continuous casting and submerged nozzle for using to this - Google Patents
Method for charging adding metal for continuous casting and submerged nozzle for using to thisInfo
- Publication number
- JPH02235557A JPH02235557A JP5507689A JP5507689A JPH02235557A JP H02235557 A JPH02235557 A JP H02235557A JP 5507689 A JP5507689 A JP 5507689A JP 5507689 A JP5507689 A JP 5507689A JP H02235557 A JPH02235557 A JP H02235557A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- powder
- metal powder
- inert gas
- mold
- 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 title claims abstract description 134
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 134
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009749 continuous casting Methods 0.000 title claims description 9
- 239000000843 powder Substances 0.000 claims abstract description 86
- 239000011261 inert gas Substances 0.000 claims abstract description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000002265 prevention Effects 0.000 claims abstract description 5
- 238000007654 immersion Methods 0.000 claims description 21
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 2
- -1 etc. is connected Substances 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000010931 gold Substances 0.000 description 6
- 229910052737 gold Inorganic materials 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009991 scouring Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000010953 base metal Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 229910000915 Free machining steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
イ．『産業上の利用分野』
本発明は連続鋳造装置のモールド内の溶融金属中に鉄粉
、合金鋼粉、鉛粉等の金属粉を供給する連続鋳造用金属
添加方法及びこれに用いられる浸漬ノズルに関するもの
である．
ｒ従来の技術１
溶融金属中に鉄粉、合金鋼粉、鉛粉等の金属粉を供給し
た場合、金属粉の冷却作用により鎮生成・偏析を少なく
して等軸晶凝固、即ち自由品率の向上が図れることが知
られている．
しかしながら連続鋳造装置のモールド内の溶融金属の空
気酸化を抑制し、不要な混入を防止する必要から、モー
ルド内の溶融金居に金属を添加することは必ずしも容易
ではない。[Detailed description of the invention] a. ``Industrial Application Field'' The present invention relates to a continuous casting metal addition method for supplying metal powder such as iron powder, alloy steel powder, lead powder, etc. to molten metal in a mold of a continuous casting device, and a submerged nozzle used therein. It is related to. rConventional technology 1 When metal powder such as iron powder, alloy steel powder, lead powder, etc. is supplied into molten metal, the cooling effect of the metal powder reduces stagnation and segregation, resulting in equiaxed crystal solidification, that is, free product rate. It is known that it is possible to improve However, it is not always easy to add metal to the molten metal in the mold because it is necessary to suppress air oxidation of the molten metal in the mold of a continuous casting apparatus and prevent unnecessary contamination.
この為モールド内に鉄、合金鋼、鉛等の金泥のみを添加
することにより、自由品率の向上が図ろうとする技術は
ない。For this reason, there is no technology that attempts to improve the free product rate by adding only gold mud such as iron, alloy steel, or lead into the mold.
他方モールド内の溶融金属に添加物を挿入する技術とし
て、脱酸剤を添加するものとして、実公昭４７−２７４
２号公報記載の技術、精練剤を添加する例として特開昭
６１−２６１４１８号公報記載の技術が有るほか、フラ
ノクスを添加する技術として特開昭５５−５７３６１号
公報記載の技術が提案されている。On the other hand, as a technique for inserting additives into molten metal in a mold, a deoxidizing agent was added, as described in Japanese Utility Model Publication No. 47-274.
In addition to the technique described in Japanese Patent Application Laid-Open No. 61-261418 as an example of adding a scouring agent, the technique described in Japanese Patent Application Laid-Open No. 55-57361 has been proposed as a technique of adding furanox. There is.
前記実公昭４７−２７４２号公報記載の技術ではモール
ド内の溶融金屈にノズルを浸しているノズルの先端部に
脱酸剤の供給通路を設け、溶融金属の注入にあわせて脱
酸剤を供給するものである。In the technique described in Japanese Utility Model Publication No. 47-2742, a deoxidizing agent supply passage is provided at the tip of the nozzle that is immersed in the molten metal in the mold, and the deoxidizing agent is supplied at the same time as the molten metal is injected. It is something to do.
ただこの技術を利用し自由晶率の向上の目的の為に鉄粉
等の金属粉を投入することも可能とも思われる。しかし
実際には必ずしもモールド内の溶融金属への金属粉の均
一な〆昆入が出来ず、自由品率の向上等の満足した結果
が得られない。However, it is also possible to use this technology to add metal powder such as iron powder for the purpose of improving the free crystal ratio. However, in reality, it is not always possible to uniformly inject the metal powder into the molten metal in the mold, and satisfactory results such as an improvement in the free product rate cannot be obtained.
また特開昭６１−２６１４１８号公報記載の技術は不活
性ガスを介し精練剤を搬送するものであり、この精練剤
の代わりに金屈粉を用い、不活性ガスで搬送させること
も可能である。Furthermore, the technique described in JP-A No. 61-261418 transports the scouring agent through an inert gas, and it is also possible to use Kinku powder instead of this scouring agent and transport the scouring agent using an inert gas. .
ただこの場合には、モールド内に不活性ガスのみで金属
粉を供給する場合には、金属粉で１〜１０ｋＫ／ ｍｉ
ｓ供給するのに２０〜１００ ｅ ／組鑞必要なためモ
ールド内の溶鋼の攪ｔ１゛が激しく操業を続けることが
出来ない。However, in this case, if the metal powder is supplied into the mold with only an inert gas, the metal powder will be supplied at a rate of 1 to 10 kK/mi.
Since 20 to 100 e/braze is required to supply the mold, the stirring t1 of the molten steel in the mold is so intense that the operation cannot be continued.
更に特開昭５５−５７３６１号公報記載の技術は、浸漬
ノズルの閉塞防止の技術である。Furthermore, the technique described in Japanese Unexamined Patent Publication No. 55-57361 is a technique for preventing blockage of a submerged nozzle.
そしてこの技術でフランクスの代わりに金屈粉を用いた
場合には、ノズル内に供給した金屈わ〕により、７８鋼
が冷却され供給口廻りに地金が付着し、ｒｕ ？Ｎノズ
ルの閉鎖原因とボイリングにより鋼の品質を悪化させる
可能性が高い。When using this technique and using Kinku powder instead of Franks, the 78 steel is cooled by the Kinku powder supplied into the nozzle, and the base metal adheres around the supply opening, causing ru? There is a high possibility that the quality of the steel will deteriorate due to N nozzle closure and boiling.
『発明が解決しようとする課題』
本発明は連続鋳造装五のモールド内の溶融金属中に金属
を添加し自由品率の向上並びに均質な溶融金屈を鋳造を
することを目的とするものであり、モールド内で不活性
ガスによるｆ６８Ｍのｂ斗を最小限度に止めつつ、溶融
金泥内の添加金序の分散を良好にする金屈の添加を行う
ことである。``Problems to be Solved by the Invention'' The purpose of the present invention is to add metal to the molten metal in the mold of a continuous casting equipment, improve the free product rate, and cast homogeneous molten metal. The purpose is to add metal to improve the dispersion of the added metal in the molten gold while minimizing the amount of f68M caused by inert gas in the mold.
またあわ已“て、添加金屈によるモールドへ注入前のｌ
是清ノズル内の溶融金屈の閉塞防止を図ることもある。In addition, the l
It is also possible to prevent clogging of the molten metal inside the Korekiyo nozzle.
口． ’：ＪＡ題を解決するための手段』本発明はタ
ンデノシュ４からその下方に配置されたモールド５に溶
融金属６を連続供給する浸漬ノズル１内部の溶融金冗流
路内で鉄粉、合金鋼粉、鉛扮等の金屈粉７の溶融金屈６
に供給する金属粉供給手段と、前記金属粉供給時に金属
粉供給点の浸漬ノズル１内部の周辺部に不活性ガスを供
給し地金生成を防止する地金生成防止手段を設け、金属
粉供給手段と地金生成防止手段を同時に行わしめ、タン
デノシュ４からモールド５まで溶融金属（５中に金属わ
）７を添加しつつ連続供給させたことを特徴とする連続
鋳造用添加金属挿入方法である。mouth. ': Means for Solving the Problems of JA' The present invention is a method for continuously supplying molten metal 6 from a tandenosh 4 to a mold 5 disposed below the immersion nozzle 1 in which iron powder, alloy steel, etc. Melting of Kinku powder 7 such as powder, lead etc. 6
metal powder supply means for supplying the metal powder to the immersion nozzle 1, and a metal generation prevention means for supplying an inert gas to the periphery of the inside of the submerged nozzle 1 at the metal powder supply point during the metal powder supply to prevent the generation of metal powder. This is a method for inserting additive metal for continuous casting, characterized in that the means and the means for preventing metal formation are carried out at the same time, and the molten metal (the metal in 5) is continuously supplied from the tandenosh 4 to the mold 5 while being added. .
またタンデソシュ４からその下方に配置されたモールド
５に溶融金属６を連続供給する？：ｊ： ’ｔＲノズル
１内部の′／ｇ鋼経由通路内の側面に、先端開口部を下
方に１頃けて固設した金屈粉供給管３の後端に鉄粉、合
金鋼粉、鉛粉等の金属粉７を装入している金属粉収納容
器８を接続すると共に、金屈粉供給管３の先端開口部の
周辺部に不活性ガス供給帯２を形成したことを特徴とす
る連続鋳造用金属添加に用いるｅ？Ｒノズルである。Also, is the molten metal 6 continuously supplied from the tande sosh 4 to the mold 5 placed below it? :j: Iron powder, alloy steel powder, It is characterized by connecting a metal powder storage container 8 containing metal powder 7 such as lead powder, and forming an inert gas supply zone 2 around the opening at the tip of the Kinku powder supply pipe 3. e? used for metal addition for continuous casting. It is an R nozzle.
なお金属粉供給管３の形成傾きは水平線に対し３０〜８
０゜の角度が良好である．但し設備等のスペースの関係
で、金属粉供給管３に傾きを設けられない場合には、金
属粉供給管３をパイプで形成し、これに搗動を与えたり
、或いはモールド５に悪影響を与えない程度の若干の不
活性ガスを供給することも可能である。また金属粉供給
管３の数は特に限定するものではなく、複数を等間隔に
設ける構成であっても良い伯、一個を浸漬ノズル１に設
け、一個を対向側のこれより上方に設ける等、取りつけ
位置を異にして設けてもよい。The slope of the metal powder supply pipe 3 is 30 to 8 with respect to the horizontal line.
An angle of 0° is good. However, if the metal powder supply pipe 3 cannot be provided with an inclination due to space limitations such as equipment, the metal powder supply pipe 3 may be formed of a pipe, and the metal powder supply pipe 3 may be formed with a pipe, and the metal powder supply pipe 3 may be subjected to agitation or may have an adverse effect on the mold 5. It is also possible to supply some inert gas to a lesser extent. Further, the number of metal powder supply pipes 3 is not particularly limited, and a plurality of metal powder supply pipes 3 may be provided at equal intervals. For example, one pipe is provided in the immersion nozzle 1 and one pipe is provided above this on the opposite side. They may be provided at different mounting positions.
更に不活性ガス供給帯２はボーラス質にし、またこの部
分に表面から所要背面にスリソトを設け、不活性ガス供
給管１０を介し不活性ガスを供給可能としている．
『作用』
本発明は上述のように構成することより、溶融金属６を
モールド５に注入する前の浸漬ノズル中で金属を粉の状
態で混入し、この状態の溶融金属６をモールド５に注入
する。従って注入時のモールド５内の溶融金属６と注入
した溶融金属６の注入圧力という弱い攪拌力で添加金屈
粉７の分散が良好に行えるように作用する．
また浸漬ノズル内へ金属粉の混入は金属粉供給管３の先
端開口部を下方に位置させた構成となっている。従って
添加金属が粉体であることより、重力で自然に落下し金
属粉供給管３の先端開口部まで、不活性ガスの供給をす
ることな《供給でき、不要の不活性ガスをモールド５内
に供給することを防止出来る。Furthermore, the inert gas supply zone 2 is made of a bolus material, and a slit is provided in this portion from the front surface to the required back surface, so that inert gas can be supplied through the inert gas supply pipe 10. [Operation] The present invention is configured as described above, so that the metal is mixed in powder form in the immersion nozzle before the molten metal 6 is injected into the mold 5, and the molten metal 6 in this state is injected into the mold 5. do. Therefore, the weak stirring force of the injection pressure between the molten metal 6 in the mold 5 and the injected molten metal 6 at the time of pouring acts to ensure good dispersion of the added metal powder 7. Further, to prevent metal powder from entering the immersion nozzle, the tip opening of the metal powder supply pipe 3 is positioned downward. Therefore, since the added metal is a powder, it falls naturally by gravity and reaches the tip opening of the metal powder supply pipe 3 without the need to supply inert gas. can be prevented from being supplied to
更に浸漬ノズル１へ金属を供給する金属供給点の金属粉
供給管３の出口の廻りには不活性ガス供給帯２が形成さ
れ不活性ガスが供給されている。Furthermore, an inert gas supply zone 2 is formed around the outlet of the metal powder supply pipe 3 at the metal supply point for supplying metal to the immersion nozzle 1, and inert gas is supplied thereto.
従って添加する金属によって、浸漬ノズル１内の地金生
成を未然に防止し、安定したモールド９への熔Ｉ’ｄ！
金属の注入を可能ならしめるように作用する。Therefore, the added metal prevents the formation of metal in the immersion nozzle 1 and allows stable melting into the mold 9!
It acts to enable metal injection.
『実施例ｊ 以下本発明を一実施例で説明する。“Example j The present invention will be explained below using one example.
タンデソシュ４の下方に配置されたモールド５に溶融金
Ｂ６を連続供給する浸漬ノズル１本体の溶融金属経由通
路内の１個所又は複数個所に先端を設けた金属粉供給管
３の後備をボール弁９を介し金屈粉収納容器８に接続す
る．
この金属粉収納容器８はモールド５内の溶融金居６に添
加する、鉄粉、合金鋼粉、鉛粉等の金属粉７が装入され
ている。An immersion nozzle 1 for continuously supplying molten gold B6 to a mold 5 disposed below the tande sosh 4. A ball valve 9 is used to connect a metal powder supply pipe 3 with a tip at one or more locations in the molten metal passageway of the body of the immersion nozzle 1. Connect to the Konku powder storage container 8 via. This metal powder storage container 8 is charged with metal powder 7 such as iron powder, alloy steel powder, lead powder, etc. to be added to the molten metal 6 in the mold 5.
なおこの金属粉７の粒度は後述する金属粉供給管３の大
きさ、傾き等により任意に選択することが出来る。Note that the particle size of the metal powder 7 can be arbitrarily selected depending on the size, inclination, etc. of the metal powder supply pipe 3, which will be described later.
次に前記金泥粉供給管３は例えば金属パイプ、セラノミ
ノク等よりなり、浸漬ノズル１に適宜手段で固設する。Next, the gold mud powder supply pipe 3 is made of, for example, a metal pipe, a ceramic pipe, etc., and is fixed to the immersion nozzle 1 by appropriate means.
そして浸漬ノズル１と金属粉供給管３の熱膨張差を吸収
する為に、セラソミノクファイバ一部材等のクッション
材等介在させて構成すると良い。In order to absorb the difference in thermal expansion between the immersion nozzle 1 and the metal powder supply pipe 3, it is preferable to interpose a cushioning material such as a piece of cerasominoku fiber.
また金属粉供給管３の管内径は０． １〜２０麿鳳が好
ましく、その先端出口を下方に位置するように傾けて設
けている．傾斜の程度は、溶融金属に添加する金属のｐ
ＩＩＪＩ、粒度によりことなるが、３０〜８０度程度が
良好である．
更に図示はしないが金泥扮供給管３にパイブレーク、超
音波等により振動を与える機構を設け金厘粉の流れをス
ムーズにさせてることもできる．また金属粉供給管３の
内部は平滑に形成させる方が良い。Further, the inner diameter of the metal powder supply pipe 3 is 0. A diameter of 1 to 20 is preferable, and the tip outlet is tilted downward. The degree of slope depends on the p of the metal added to the molten metal.
IIJI, it depends on the particle size, but about 30 to 80 degrees is good. Furthermore, although not shown in the drawings, the gold powder supply pipe 3 may be provided with a pie-break mechanism, a mechanism for applying vibrations using ultrasonic waves, etc., to smooth the flow of the gold powder. Further, it is preferable that the inside of the metal powder supply pipe 3 be formed to be smooth.
この金属粉供給管３の先端出口の周囲の浸漬ノズル１内
面には、例えば通気性レンガよりなる不活性ガス供給帯
２が形成されており、不活性ガス供給管１０に接続され
ている。An inert gas supply zone 2 made of, for example, a permeable brick is formed on the inner surface of the immersion nozzle 1 around the outlet end of the metal powder supply tube 3, and is connected to the inert gas supply tube 10.
なお図中１１は金属粉収納容器日のタンク圧調整用不活
性ガス供給管、１２は金属粉供給管３に接続した不活性
ガス供給管である。In the figure, 11 is an inert gas supply pipe for adjusting the tank pressure of the metal powder storage container, and 12 is an inert gas supply pipe connected to the metal powder supply pipe 3.
また第２図は金属粉７に鉛を使用した場合に、金属粉供
給管３の勾配と鉛の落下量及び粒度の関係を示す図であ
り、第３図は金尿わ）７に鉄を使用した場合に、金属粉
供給管３の勾配と鉛の落下量及び粒度の関係を示す図で
ある。Fig. 2 is a diagram showing the relationship between the slope of the metal powder supply pipe 3, the falling amount of lead, and the particle size when lead is used as the metal powder 7. FIG. 3 is a diagram showing the relationship between the slope of the metal powder supply pipe 3 and the falling amount and particle size of lead when used.
なお上記第２図、第３図中の雲マーク内は安定した金属
粉７の落下が得られた。また鉛粉に於いて粒径が０．７
〜１．０鶴の範囲では金属粉７は落下しなかった．
今上記実施例に於いて、クンデソシュ４内の溶融金属６
を浸漬ノズルｌを介して鋳造する場合を説明する。鋳造
初期は浸漬ノズル１内が正圧（＋３となり、金属粉供給
管３に溶融金属６が逆流する為、ボール弁８を閉じた状
態で不活性ガス供給管１２より、不活性ガス圧力０．０
１〜９．９ｋｉｒ／ｃｄで不活性ガスを供給する。Note that stable falling of the metal powder 7 was obtained within the cloud marks in FIGS. 2 and 3 above. In addition, the particle size of lead powder is 0.7
Metal powder 7 did not fall in the range of ~1.0 cranes. In the above embodiment, the molten metal 6 in Kundesosh 4
A case will be explained in which the material is cast through the immersion nozzle L. At the initial stage of casting, the pressure inside the immersion nozzle 1 becomes positive (+3), and the molten metal 6 flows back into the metal powder supply pipe 3. Therefore, with the ball valve 8 closed, the inert gas pressure is increased to 0.0 from the inert gas supply pipe 12. 0
Inert gas is supplied at 1 to 9.9 kir/cd.
次いでモールド５の溶融金属６に浸漬ノズル１が浸漬さ
れ定常状態の鋳造になった後、浸漬ノズル１内は負圧（
−）となる為、不活性ガス供給管１２より不活性ガスの
供給を止め、ボール弁９を開き、金屈粉収納容器Ｂ内の
金属粉７を金属粉供給管３に供給する。Next, the immersion nozzle 1 is immersed in the molten metal 6 of the mold 5, and after steady-state casting, the inside of the immersion nozzle 1 is under negative pressure (
-), the supply of inert gas from the inert gas supply pipe 12 is stopped, the ball valve 9 is opened, and the metal powder 7 in the metal powder storage container B is supplied to the metal powder supply pipe 3.
なお溶融金屈６内にエアを吹き込まないように金屈扮収
納容器８は密閉とし、少量の不活性ガスをタンク圧咽整
用不活性ガス供給管ｌ１により供給してタンク圧を調整
している。In order to prevent air from being blown into the molten Kinku 6, the Konkuku storage container 8 is sealed, and the tank pressure is adjusted by supplying a small amount of inert gas through the tank pressure inert gas supply pipe 11. There is.
また金冗粉７の供給量は溶融金冗６の通流量により調整
する。例えばこの制御はタンク圧の変更で容易に行うこ
とが出来る。Further, the supply amount of the gold powder 7 is adjusted by the flow rate of the molten metal powder 6. For example, this control can be easily performed by changing the tank pressure.
更に溶融金属６をモールド５に注入する際に、浸ｌ貴ノ
ズル１内で金属粉７の冷却作用で溶融金属６が冷却し浸
漬ノズル１が閉塞することを防止する為に、不活性ガス
は不活性ガス供給管１０を介し不活性ガス供給帯２に供
給され、地金付着の防止を図っている。Furthermore, when pouring the molten metal 6 into the mold 5, an inert gas is used to prevent the molten metal 6 from being cooled by the cooling action of the metal powder 7 in the immersion nozzle 1 and clogging the immersion nozzle 1. The inert gas is supplied to the inert gas supply zone 2 through the inert gas supply pipe 10 to prevent metal adhesion.
なおこの時通気性レンガを用いた不活性ガス供給帯２へ
の不活性ガスの供給は通鋼量により異なるが、２０〜１
００ｌ／ｍの範囲が地金付着防止とモールド５内の溶融
金ｍＧの攪拌を防止出来た。At this time, the supply of inert gas to the inert gas supply zone 2 using breathable bricks varies depending on the amount of steel passed, but it is 20 to 1
The range of 00 l/m was able to prevent the adhesion of base metal and the stirring of the molten gold mG in the mold 5.
ハ，『発明の効果ｊ
本発明は上述のように、／ｊ１？′！４ノズルからモー
ルド内へ供給する溶融金属中に金属粉を添加するという
、これまでにない？！ｋ ？Ｍノズルを用いることによ
り、均一な金屈の鋳造が可能になった．またこのように
して鋳造された金属は、自由晶率の向上が認められ、均
一な金属の鋳造が可能になった。C. ``Effects of the Invention j As described above, the present invention is /j1? ′! Adding metal powder to the molten metal supplied into the mold from 4 nozzles is unprecedented! ! K? By using the M nozzle, it has become possible to cast uniform metal curvature. Furthermore, the metal cast in this manner was found to have an improved free crystal ratio, making it possible to cast uniform metal.
更に金属粉に鉛を用いて、鉛快削綱を製造した場合、従
来のようにネｈ練炉、取鍋埠で鉛を添加する方法のよう
な大掛かり鉛蒸気集塵装置を必要とせず作業環境を良好
に出来る他、鋳造コストの軽減を図ることが出来、かつ
鉛の分散の良好な船快ｍ鋼を製造することが出来等優れ
た効果を有する。Furthermore, when lead is used as the metal powder to manufacture lead free-cutting steel, there is no need for a large-scale lead steam dust collector, which is required in the conventional method of adding lead in a drying furnace or ladle wharf. In addition to improving the environment, it has other excellent effects, such as reducing casting costs and producing ship-free m steel with good lead dispersion.
第１図は本発明概略説明図、第２図、第３図は金泥粉供
給管の勾配と鉛の落下量及び粒度の関係を示す図で、第
２図は金属粉に，鉛を使用した場合、第３図は金泥粉に
鉄を使用した場合の例を示した図である。
１は？Ｍｌ責ノズル、２は不活性ガス供給帯、３は金屈
粉供給管、４はタンデッシェ、５はモールド、６は溶融
金属、７は金屈粉、８は金属粉収納容器、９はボール弁
、１０は不活性ガス供給管、１１はタンク圧調整用不活
性ガス供給管、１２は不活性ガス供給管，Figure 1 is a schematic illustration of the present invention, Figures 2 and 3 are diagrams showing the relationship between the slope of the gold powder supply pipe, the falling amount of lead, and the particle size. In this case, FIG. 3 is a diagram showing an example in which iron is used as the gold mud powder. What about 1? Ml nozzle, 2 is an inert gas supply zone, 3 is a powder supply pipe, 4 is a tandesche, 5 is a mold, 6 is a molten metal, 7 is a powder powder, 8 is a metal powder storage container, 9 is a ball valve , 10 is an inert gas supply pipe, 11 is an inert gas supply pipe for adjusting tank pressure, 12 is an inert gas supply pipe,
Claims (2)
に溶融金属を連続供給する浸漬ノズル内部の溶融金属流
路内で鉄粉、合金鋼粉、鉛粉等の金属粉の溶融金属に供
給する金属粉供給手段と、前記金属粉供給時に金属粉供
給点の浸漬ノズル内部の周辺部に不活性ガスを供給し地
金生成を防止する地金生成防止手段を設け、金属粉供給
手段と地金生成防止手段を同時に行わしめ、タンデッシ
ュからモールドまでの溶融金属中に金属粉を添加しつつ
連続供給させたことを特徴とする連続鋳造用添加金属挿
入方法。(1) Metal powder such as iron powder, alloy steel powder, lead powder, etc. is supplied to the molten metal in the molten metal flow path inside the immersion nozzle that continuously supplies molten metal from the tundish to the mold placed below it. A supply means and a metal powder generation prevention means for supplying an inert gas to the periphery of the inside of the submerged nozzle at the metal powder supply point when supplying the metal powder to prevent metal generation are provided. 1. A method for inserting additive metal for continuous casting, characterized in that the steps are carried out at the same time, and metal powder is added and continuously supplied to molten metal from a tundish to a mold.
に溶融金属を連続供給する浸漬ノズル内部の溶鋼経由通
路内の側面に、先端開口部を下方に傾けて固設した金属
粉供給管の後端に鉄粉、合金鋼粉、鉛粉等の金属粉を装
入している金属粉収納容器を接続すると共に、金属粉供
給管の先端開口部の周辺部に不活性ガス供給帯を形成し
たことを特徴とする連続鋳造用金属添加に用いる浸漬ノ
ズル。(2) At the rear end of the metal powder supply pipe, which is fixed with the tip opening tilted downward, on the side of the molten steel passage inside the immersion nozzle that continuously supplies molten metal from the tundish to the mold placed below. A metal powder storage container containing metal powder such as iron powder, alloy steel powder, lead powder, etc. is connected, and an inert gas supply zone is formed around the opening at the tip of the metal powder supply pipe. Features: Immersion nozzle used for metal addition for continuous casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1055076A JPH0745095B2 (en) | 1989-03-09 | 1989-03-09 | Method for inserting additive metal for continuous casting and immersion nozzle used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1055076A JPH0745095B2 (en) | 1989-03-09 | 1989-03-09 | Method for inserting additive metal for continuous casting and immersion nozzle used therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02235557A true JPH02235557A (en) | 1990-09-18 |
| JPH0745095B2 JPH0745095B2 (en) | 1995-05-17 |
Family
ID=12988613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1055076A Expired - Lifetime JPH0745095B2 (en) | 1989-03-09 | 1989-03-09 | Method for inserting additive metal for continuous casting and immersion nozzle used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0745095B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2055411A1 (en) * | 2007-11-02 | 2009-05-06 | TSW Trierer Stahlwerk GmbH | Method and device for continuous casting of steel |
| CN104220190A (en) * | 2012-03-28 | 2014-12-17 | 安赛乐米塔尔研发有限公司 | Continuous casting process of metal |
| CN110181011A (en) * | 2019-06-25 | 2019-08-30 | 华北理工大学 | A kind of method and its system improving Continuous Casting Square, round billet surface quality |
| CN111451462A (en) * | 2020-04-09 | 2020-07-28 | 苏州大学 | Method for refining solidification structure of continuous casting billet by utilizing submerged nozzle to spray magnesium powder |
| WO2021203851A1 (en) * | 2020-04-09 | 2021-10-14 | 苏州大学 | Method for magnesium and calcium treatments of molten steel by spraying powder using elongated nozzle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5557361A (en) * | 1978-10-21 | 1980-04-28 | Shinagawa Refract Co Ltd | Preventing method for closing of immersion nozzle |
| JPS55114449A (en) * | 1979-02-27 | 1980-09-03 | Toshiba Ceramics Co Ltd | Gas blowing type immersion nozzle |
| JPS62192237A (en) * | 1986-02-19 | 1987-08-22 | Kawasaki Steel Corp | Production of lead free cutting steel |
-
1989
- 1989-03-09 JP JP1055076A patent/JPH0745095B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5557361A (en) * | 1978-10-21 | 1980-04-28 | Shinagawa Refract Co Ltd | Preventing method for closing of immersion nozzle |
| JPS55114449A (en) * | 1979-02-27 | 1980-09-03 | Toshiba Ceramics Co Ltd | Gas blowing type immersion nozzle |
| JPS62192237A (en) * | 1986-02-19 | 1987-08-22 | Kawasaki Steel Corp | Production of lead free cutting steel |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2055411A1 (en) * | 2007-11-02 | 2009-05-06 | TSW Trierer Stahlwerk GmbH | Method and device for continuous casting of steel |
| CN104220190A (en) * | 2012-03-28 | 2014-12-17 | 安赛乐米塔尔研发有限公司 | Continuous casting process of metal |
| CN110181011A (en) * | 2019-06-25 | 2019-08-30 | 华北理工大学 | A kind of method and its system improving Continuous Casting Square, round billet surface quality |
| CN111451462A (en) * | 2020-04-09 | 2020-07-28 | 苏州大学 | Method for refining solidification structure of continuous casting billet by utilizing submerged nozzle to spray magnesium powder |
| CN111451462B (en) * | 2020-04-09 | 2021-09-28 | 苏州大学 | Method for refining solidification structure of continuous casting billet by utilizing submerged nozzle to spray magnesium powder |
| WO2021203851A1 (en) * | 2020-04-09 | 2021-10-14 | 苏州大学 | Method for magnesium and calcium treatments of molten steel by spraying powder using elongated nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0745095B2 (en) | 1995-05-17 |
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