JPS6087959A - Method and device for supplying powder of continuous casting - Google Patents
Method and device for supplying powder of continuous castingInfo
- Publication number
- JPS6087959A JPS6087959A JP19672883A JP19672883A JPS6087959A JP S6087959 A JPS6087959 A JP S6087959A JP 19672883 A JP19672883 A JP 19672883A JP 19672883 A JP19672883 A JP 19672883A JP S6087959 A JPS6087959 A JP S6087959A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- molten
- mold
- layer
- molten metal
- 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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/108—Feeding additives, powders, or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は、連続鋳造におけるパウダ供給方法およびそ
の装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a powder supply method and apparatus for continuous casting.
〈従来技術〉
最近の連続鋳造では、浸漬ノズルを使用し、パウダを溶
鋼湯面に供給し溶鋼湯面な被覆するとともに溶鋼熱によ
り溶融して１滑剤として利用することが行なわれている
。このパウダ供給の目的としては、■モールドと鋳片間
の潤滑剤、■溶鋼中に混入した介在物の捕捉、■溶鋼表
面からの輻射熱しゃ断などである。<Prior Art> In recent continuous casting, a submerged nozzle is used to supply powder to the surface of the molten steel to coat the surface of the molten steel, melt it with the heat of the molten steel, and use it as a lubricant. The purpose of this powder supply is (1) to act as a lubricant between the mold and the slab, (2) to capture inclusions mixed into the molten steel, and (2) to block radiant heat from the surface of the molten steel.
従来においては、粉末あるいは顆粒状のパウダをモール
ド内中央部に自動的に供給しているが、前述の■につい
ては十分満足するものの、■、■罠ついては不規則、不
安定な状態が多々発生している。Conventionally, powder or granular powder is automatically supplied to the center of the mold, but although the above-mentioned item (1) is fully satisfied, (2) and (2) trapping often occurs in irregular and unstable conditions. are doing.
これは、次のような卵白による。This is due to egg whites as follows.
（ｉ） パウダ供給がモールド中央部の一部に限られて
おり、モールド端部、角部、浸漬ノズル近辺への供給が
困難で不均一供給である。(i) Powder supply is limited to a part of the center of the mold, and it is difficult to supply powder to the mold edges, corners, and the vicinity of the immersion nozzle, resulting in uneven supply.
（ｉ）第１図に示すよ５に、供給されたパウダは、顆粒
層Ａ、焼結層Ｂ（炭素富化層Ｂ′）。(i) As shown in FIG. 1, the supplied powder is a granular layer A and a sintered layer B (carbon enriched layer B').
溶融層Ｃの順で変態し、大きく三層をなしており、これ
ら焼結層Ｂと溶融層Ｃとの間の空気の有無や（１）の状
態等により均一な溶融が困難となり、第２図に示すよう
に溶融層Ｃが薄くなり、あるいはなくなる事がある。The sintered layer B transforms in the order of the molten layer C, forming three major layers, and uniform melting becomes difficult depending on the presence or absence of air between the sintered layer B and the sintered layer C and the condition described in (1). As shown in the figure, the molten layer C may become thinner or disappear.
このような状態になると、モールド１とシェルＳ間への
溶融層Ｃの流入が不均一、あるいはなくなり、鋳片縦割
れ、モールドへの焼付き等を生じ、ブレークアウト発生
の原因となっている。In such a state, the inflow of the molten layer C between the mold 1 and the shell S becomes uneven or disappears, causing longitudinal cracking of the slab, seizure to the mold, etc., which causes breakout. .
〈発明の目的〉
この発明は、前述のような事情に鑑みて提案されたもの
で、その目的は、モールド内での溶融層の厚さを常に一
定に保ち、かつ、安定に維持し、モールド、鋳片間に均
一に流入させることによって、鋳片品質の維持向上とブ
レークアウトの防止をなし得るパウダの供給方法および
その装置を提供することにある。<Object of the Invention> The present invention was proposed in view of the above-mentioned circumstances, and its purpose is to always keep the thickness of the molten layer constant and stable within the mold, and to Another object of the present invention is to provide a method and apparatus for supplying powder that can maintain and improve the quality of slabs and prevent breakouts by uniformly flowing powder between slabs.
〈発明の構成〉
この発明に係るパウダ供給方法は、モールド内の溶鋼湯
面上に、モールド外において溶融させた溶融パウダを供
給するようにしたものである。<Structure of the Invention> The powder supply method according to the present invention is such that molten powder melted outside the mold is supplied onto the surface of molten steel in the mold.
この発明に係るパウダ供給装置は、モールド外に位置し
、パウダを溶融させ得る溶融容器およびこの溶融容器か
ら延出し先端が溶轄湯面上に位置し得る供給ノズル有す
る溶融パウダ供給装置と、溶鋼湯面上に供給された溶融
パウダの厚さを検出し得る検出器とを備えたものである
。The powder supply device according to the present invention includes a melting container that is located outside the mold and can melt powder, a supply nozzle that extends from the melting container and whose tip can be positioned above the surface of the molten metal, and It is equipped with a detector capable of detecting the thickness of the molten powder supplied on the surface of the molten metal.
〈実施例〉
以下、この発明を図示する一実施例に基づいて説明する
。この発明に係るパウダ供給方法は、顆粒あるいは粉末
パウダＰ０をモールド１内に供給する前にモールド１外
において加熱溶融し、溶融した溶融パウダＰ、をモール
ド内の溶鋼湯面と断熱材（顆粒パウダ）Ｐ′との間に供
給するものである。<Example> The present invention will be described below based on an illustrative example. In the powder supply method according to the present invention, granules or powder powder P0 are heated and melted outside the mold 1 before being supplied into the mold 1, and the molten powder P is transferred to the surface of the molten steel in the mold and to the heat insulating material (granule powder). ) P'.
なお、切込スタート時のモールド内湯面変動が大きい時
には、顆粒中粉末パウダを使用し、自動鋳込等の湯面変
動が小さい時は、本発明に係る溶融バッグを使用するこ
とになる。Note that when the mold level fluctuations at the start of cutting are large, powder in granules is used, and when the mold level fluctuations are small during automatic casting, etc., the melting bag according to the present invention is used.
次に、この発明に係るパウダ供給装置は、第４図に示す
ように、モールド外におけるタンディツシュ２に固定さ
れ、顆粒・粉末パウダＰ０を溶融させ得る溶融容器３お
よびこの溶融容器３の底部から下方向斜めに延出し先端
が溶鋼湯面りの上方に位置し得る供給ノズル４を有する
溶融パウダ供給装ｆｔ５と、溶鋼湯面り上に供給された
溶融パウダＰ１の厚さｈを検出し得る検出器６とからな
る。Next, as shown in FIG. 4, the powder supply device according to the present invention includes a melting container 3 that is fixed to the tundish 2 outside the mold and capable of melting the granule/powder powder P0, and a A molten powder supply device ft5 having a supply nozzle 4 that extends diagonally in the direction and whose tip can be positioned above the molten steel surface, and a detection device that can detect the thickness h of the molten powder P1 supplied above the molten steel surface. It consists of a vessel 6.
溶融容器３は、黒鉛レンガ製の球状であり、このような
容器に電流を流せば抵抗発熱によリパウダＰ０が溶融す
る。溶融容器３内では、従来のモールド内と同様に上か
ら順に顆粒層Ａ、焼結層Ｂ、溶融層Ｃが形成されている
。The melting container 3 has a spherical shape made of graphite bricks, and when an electric current is passed through such a container, the powder P0 is melted by resistance heat generation. Inside the melting container 3, a granule layer A, a sintered layer B, and a molten layer C are formed in order from the top, as in the conventional mold.
ここで、パウダＰ０の成分の一例をあげれば次のとおり
であり。Here, an example of the ingredients of powder P0 is as follows.
１１００℃前後で溶融する。Melts at around 1100°C.
また、溶融容器３には、溶鍋上面に常に十分な溶融パウ
ダＰ、を維持させ、かつ、適正な液面管理をするために
、供給オン、オフ制御すべ（ノズルストッパ等の制御機
構７が設けられている。In addition, the melting container 3 has a supply on/off control mechanism (control mechanism 7 such as a nozzle stopper) in order to always maintain a sufficient amount of molten powder P on the upper surface of the melting pot and to properly manage the liquid level. It is provided.
検出器６は、第５図に示すように、溶鋼湯面りの上方に
上下位置調整自在に設けられ、励磁・受信コイルからな
る磁界コイル８により磁界をかけてその磁界の強度によ
り溶釘湯りとの距離を計り、溶融パウダＰｄｆＪの厚み
ｈをめるものである。As shown in Fig. 5, the detector 6 is installed above the molten steel surface in a vertically adjustable manner, and a magnetic field coil 8 consisting of an excitation/receiving coil applies a magnetic field to the molten steel molten metal due to the strength of the magnetic field. The thickness h of the molten powder PdfJ is determined by measuring the distance from the molten powder PdfJ.
なお、溶融パウダ烏層の上面位置は、γ線透過装置９に
より検出されているので、この埼出値に合わせて検出器
６の上下位置を調整する。Incidentally, since the upper surface position of the molten powder layer is detected by the gamma ray transmission device 9, the vertical position of the detector 6 is adjusted in accordance with this extrusion value.
〈発明の効果〉
この発明に係るパウダ供給方法およびその装置は、以上
のような構成からなるので次のような効果を奏する。<Effects of the Invention> Since the powder supply method and device thereof according to the present invention have the above-described configuration, the following effects can be achieved.
中 溶融パウダを溶鋼上に供給することにより、溶鋼上
面に十分な溶融パウダ厚みをもたせることができるとと
もにモールドと鋳片シェルＳとの間に均一な溶融パウダ
が流入し、鋳片縦割れの減少、モールド内焼付きによる
ブレークアウト（拘束性Ｂ 、０） ′の防止を図るこ
とができる。By supplying the molten powder onto the molten steel, it is possible to have a sufficient thickness of the molten powder on the top surface of the molten steel, and the molten powder flows uniformly between the mold and the slab shell S, reducing vertical cracks in the slab. , it is possible to prevent breakout (restriction B, 0)' due to seizure within the mold.
＋１１＋ ハイサイクル、ロウスト四−り振動による連
続鋳造時のパウダ流人が容易かつ確実 −となり鋳片表
面疵が減少する。+11+ Powder flows easily and reliably during continuous casting due to high-cycle, low-fourth vibration - reducing surface defects on slabs.
これによりオシレーションマークの極メチ小さな操業が
可能となる。This allows operation with extremely small oscillation marks.
（１ｊ０ 溶鋼上面の３層（顆粒、焼結、溶融）管理が
不要となり、運転者に高度な熟練を必要としない。(1j0) There is no need to manage the three layers (granules, sintering, and melting) on the top surface of molten steel, and the operator does not need a high level of skill.
６♀ 焼結層がないためにパウダベア１ｏの除去が容易
かつ確実となり、操業が容易となる。6♀ Since there is no sintered layer, powder bear 1o can be removed easily and reliably, making operation easier.
（ψ パウダ溶融層の厚みを自由に変化させることがで
き、鋼種、鋳込速度、モールド振動条件等にマツチした
パウダ溶融層の厚み管理が可能となる。(ψ The thickness of the molten powder layer can be changed freely, and the thickness of the molten powder layer can be controlled to match the steel type, casting speed, mold vibration conditions, etc.).
（ｖｂ 保温を目的とする顆粒層Ａと潤滑を目的とする
溶融層Ｃの成分をそれぞれ最適なもの忙変えられる。(vb) The components of the granule layer A for heat retention and the molten layer C for lubrication can be optimized.
第１図、第２図は、従来のパウダ供給方法によるモール
ド内の状態を示す縦断面図、第３図は、本発明に係るパ
ウダ供給方法によるモールド内の状態を示す縦断面図、
８４図は、本発明に係るパウダ供給装置を示す縦断面図
、第５図は、同様の検出器を示す概略断面図である。
Ａ・・・顆粒層、Ｂ・・・焼結層、Ｃ・・・溶融層、Ｓ
・・・シェル、１・・・モールド、２・・・タンディツ
シュ。
３・・・溶融容器、４・・・供給ノズル、５・・・溶融
パウダ供給装置、６・・・検出器、７・・・制御機構、
８・・・磁界コイル、９・・・γ線透過装置、１０・・
・〕くウダベア、Ｐｏ・・・顆粒あるいは粉末ノくラダ
、Ｐ１・・・溶融パウダ。1 and 2 are longitudinal sectional views showing the state inside the mold according to the conventional powder supply method, and FIG. 3 is a longitudinal sectional view showing the state inside the mold according to the powder supply method according to the present invention.
FIG. 84 is a longitudinal sectional view showing a powder supply device according to the present invention, and FIG. 5 is a schematic sectional view showing a similar detector. A... Granule layer, B... Sintered layer, C... Molten layer, S
...Shell, 1...Mold, 2...Tanditshu. 3... Melting container, 4... Supply nozzle, 5... Melted powder supply device, 6... Detector, 7... Control mechanism,
8... Magnetic field coil, 9... γ-ray transmission device, 10...
・] Kuudabea, Po...granules or powder, P1...molten powder.
Claims (2)
溶融させた溶融パウダを供給することを特徴とする連続
鋳造のパウダ供給方法。(1) A continuous casting powder supply method characterized by supplying molten powder melted outside the mold onto the molten steel surface within the mold.
容器およびこの溶融容器から延出し先端が溶鋼湯面上に
位置し得る供給ノズルを有する溶融パウダ供給装置と、
溶鋼湯面上に供給された溶融パウダの厚さを検出し得る
検出器とを備えていることを特徴とする連続鋳造のパウ
ダ供給装置。(2) A molten powder supply device having a melting container located outside the mold and capable of melting the powder, and a supply nozzle extending from the melting container and having a tip thereof positioned above the molten steel surface;
1. A powder supply device for continuous casting, comprising: a detector capable of detecting the thickness of molten powder supplied onto the surface of molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19672883A JPS6087959A (en) | 1983-10-20 | 1983-10-20 | Method and device for supplying powder of continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19672883A JPS6087959A (en) | 1983-10-20 | 1983-10-20 | Method and device for supplying powder of continuous casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6087959A true JPS6087959A (en) | 1985-05-17 |
Family
ID=16362600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19672883A Pending JPS6087959A (en) | 1983-10-20 | 1983-10-20 | Method and device for supplying powder of continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6087959A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6321828B1 (en) * | 1994-01-28 | 2001-11-27 | Mannesmann Aktiengesellschaft | Continuous casting facility and process for producing rectangular thin slabs |
| US6568461B1 (en) * | 1994-01-28 | 2003-05-27 | Mannesmann Aktiengesellschaft | Continuous casting facility and process for producing thin slabs |
| KR100775090B1 (en) | 2006-08-07 | 2007-11-08 | 주식회사 포스코 | Apparatus for suppling mold flux |
| KR100775091B1 (en) | 2006-08-07 | 2007-11-08 | 주식회사 포스코 | Mold for continuous casting machine |
| KR100822412B1 (en) * | 2006-10-26 | 2008-04-16 | 주식회사 포스코 | Supplying apparatus of mold flux for continuous casting |
| KR100829908B1 (en) | 2006-10-26 | 2008-05-19 | 주식회사 포스코 | Mold Flux Melting Pot |
| US20160069789A1 (en) * | 2014-09-05 | 2016-03-10 | Southwest Research Institute | System, Apparatus Or Method For Characterizing Pitting Corrosion |
| CN108637193A (en) * | 2018-08-20 | 2018-10-12 | 武汉科技大学 | A kind of crystallizer protecting residue slag layer thickness automatic measurement and regulating device and method |
-
1983
- 1983-10-20 JP JP19672883A patent/JPS6087959A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6321828B1 (en) * | 1994-01-28 | 2001-11-27 | Mannesmann Aktiengesellschaft | Continuous casting facility and process for producing rectangular thin slabs |
| US6568461B1 (en) * | 1994-01-28 | 2003-05-27 | Mannesmann Aktiengesellschaft | Continuous casting facility and process for producing thin slabs |
| KR100775090B1 (en) | 2006-08-07 | 2007-11-08 | 주식회사 포스코 | Apparatus for suppling mold flux |
| KR100775091B1 (en) | 2006-08-07 | 2007-11-08 | 주식회사 포스코 | Mold for continuous casting machine |
| KR100822412B1 (en) * | 2006-10-26 | 2008-04-16 | 주식회사 포스코 | Supplying apparatus of mold flux for continuous casting |
| KR100829908B1 (en) | 2006-10-26 | 2008-05-19 | 주식회사 포스코 | Mold Flux Melting Pot |
| US20160069789A1 (en) * | 2014-09-05 | 2016-03-10 | Southwest Research Institute | System, Apparatus Or Method For Characterizing Pitting Corrosion |
| US10317332B2 (en) * | 2014-09-05 | 2019-06-11 | Southwest Research Institute | System, apparatus or method for characterizing pitting corrosion |
| CN108637193A (en) * | 2018-08-20 | 2018-10-12 | 武汉科技大学 | A kind of crystallizer protecting residue slag layer thickness automatic measurement and regulating device and method |
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