JP2010222592A - Lance pipe - Google Patents

Lance pipe Download PDF

Info

Publication number
JP2010222592A
JP2010222592A JP2009007322A JP2009007322A JP2010222592A JP 2010222592 A JP2010222592 A JP 2010222592A JP 2009007322 A JP2009007322 A JP 2009007322A JP 2009007322 A JP2009007322 A JP 2009007322A JP 2010222592 A JP2010222592 A JP 2010222592A
Authority
JP
Japan
Prior art keywords
metal
core
molten metal
peripheral surface
lance
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
Application number
JP2009007322A
Other languages
Japanese (ja)
Other versions
JP4897002B2 (en
Inventor
Tomomi Soeda
知美 副田
Kenji Yanagi
憲治 柳
Takaaki Matsushima
隆朗 松島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TYK Corp
Original Assignee
TYK Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TYK Corp filed Critical TYK Corp
Priority to JP2009007322A priority Critical patent/JP4897002B2/en
Publication of JP2010222592A publication Critical patent/JP2010222592A/en
Application granted granted Critical
Publication of JP4897002B2 publication Critical patent/JP4897002B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lance pipe with in which a core metal is hardly worn even in the case when a solid-molten metal treating agent such as powder is introduced in the lance pipe having a curving portion in the core metal, and which is easily manufactured. <P>SOLUTION: In the lance pipe 1 provided with the metal-made cylindrical core metal 10 and a refractory layer 20 covering the outer peripheral surface of the core metal, and for supplying the solidified molten metal treating agent into the molten metal; the core metal is provided with a straight pipe part 11 extended as the straight-line state from an introducing input hole 21 for introducing the molten metal treating agent and a curving pipe part 12 extended while curving from the straight pipe part, and on the inner peripheral surface of the straight pipe part and the curving pipe part in the core metal, one or more of metal-made projecting pieces P, projected at 1/20-1/2 height of the inner diameter of the core metal from the inner peripheral surface in the outside direction to the curve of the curving pipe part, are provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、ランスパイプに関するものであり、特に、芯金に曲がっている部分を有するランスパイプに関するものである。   The present invention relates to a lance pipe, and more particularly to a lance pipe having a portion bent in a core metal.

ランスパイプは、製銑・製鋼工程などにおいて、溶銑や溶鋼等の溶融金属の撹拌、脱リン・脱炭素・脱珪・脱硫処理等の非金属成分の除去処理、成分調整、温度制御等のために、ガスや溶湯処理剤を溶融金属中に吹き込む長尺のパイプである。このランスパイプは、鋼等の金属製の管(芯金)と、芯金の外周面を被覆するように設けられる耐火物層とによって主に構成されている。このようなランスパイプとして、従来、芯金が直線状に伸びている直管タイプの他、芯金が途中で曲がっており、側面視が略J字形または略L字形のタイプ、いわゆる「Jランス」、「Lランス」と称されるランスパイプが使用されている(例えば、特許文献1参照)。   Lance pipes are used for the agitation of molten metal such as hot metal and molten steel, removal of non-metallic components such as dephosphorization, decarbonization, desiliconization, and desulfurization, component adjustment, temperature control, etc. In addition, it is a long pipe that blows gas or molten metal treatment agent into the molten metal. This lance pipe is mainly composed of a metal pipe (core metal) such as steel and a refractory layer provided so as to cover the outer peripheral surface of the core metal. As such a lance pipe, conventionally, in addition to the straight pipe type in which the core metal extends linearly, the core metal is bent in the middle, and the side view has a substantially J-shape or a substantially L-shape, so-called “J lance”. ”And“ L lance ”are used (see, for example, Patent Document 1).

上記のJランスやLランスなど、芯金が曲がっているランスパイプを用いて、粉末など固体の溶湯処理剤を溶融金属に供給する場合、芯金が曲がってい部分の内周面に、落下してきた溶湯処理剤が衝突することとなる。そのため、溶湯処理剤の衝突を繰り返し受けることによって、芯金がその部分で損耗し、ランスパイプの耐用期間が非常に短いという問題があった。   When supplying a molten metal treatment agent such as powder to the molten metal using a lance pipe with a bent core metal, such as the J lance or L lance described above, it will fall to the inner peripheral surface of the bent core metal part. The molten metal treatment agent will collide. For this reason, there has been a problem in that the core metal is worn out by repeatedly receiving the collision of the molten metal treatment agent, and the service life of the lance pipe is very short.

このような問題を解決するに当たり、単純に考えた場合は、金属製の芯金の内周面を肉盛り溶接することにより、曲がっている部分で芯金を厚くするという手段を想到し得る。しかしながら、芯金の内周面を肉盛り溶接することは、非常に手間がかかる作業であり、コストもかかるという問題があった。   In order to solve such a problem, when simply considered, it is possible to conceive a means for thickening the core metal at the bent portion by performing build-up welding on the inner peripheral surface of the metal core metal. However, overlay welding the inner peripheral surface of the cored bar is a very time-consuming operation, and there is a problem that costs are increased.

そこで、本発明は、上記の実情に鑑み、芯金に曲がっている部分を有するランスパイプであって、粉末など固体の溶湯処理剤を導入しても芯金が損耗し難く、且つ、容易に製造することができるランスパイプの提供を、課題とするものである。   Therefore, in view of the above circumstances, the present invention is a lance pipe having a bent portion in a core metal, and even if a solid molten treatment agent such as powder is introduced, the core metal is not easily worn and easily. It is an object to provide a lance pipe that can be manufactured.

上記の課題を解決するため、本発明にかかるランスパイプは、「金属製で円管状の芯金、及び、該芯金の外周面を被覆する耐火物層を備え、固体の溶湯処理剤を溶融金属に供給するランスパイプであって、前記芯金は、溶湯処理剤が導入される導入口から直線状に伸びる直管部、及び、該直管部から湾曲して延設される曲管部を備え、前記芯金の直管部の内周面、または/及び、前記曲管部において前記曲管部の湾曲に対して外側となる方向の内周面から、前記芯金の内径の1/20〜1/2の高さ突出している一以上の金属製の突片を具備する」ものである。   In order to solve the above-described problems, the lance pipe according to the present invention includes a metal-made tubular cored bar and a refractory layer covering the outer peripheral surface of the cored bar, and melts a molten metal treatment agent. A lance pipe for supplying a metal, wherein the cored bar is a straight pipe portion extending straight from an introduction port into which a molten metal treatment agent is introduced, and a bent pipe portion curved and extended from the straight pipe portion 1 from the inner peripheral surface of the straight pipe portion of the core metal and / or the inner peripheral surface of the curved pipe portion in the direction of the outer side with respect to the curve of the curved pipe portion. One or more metal protrusions protruding at a height of / 20 to 1/2.

「芯金」は、鋼や合金鋼等の金属で構成される管状の部材であり、「円管状」とは断面が円形または楕円形であることを指している。なお、芯金の材質や寸法は、対象とする溶融金属の処理量、処理温度、流通させる溶湯処理剤の種類や流量等により、適宜設定することができる。   The “core metal” is a tubular member made of a metal such as steel or alloy steel, and the “circular tube” indicates that the cross section is circular or elliptical. The material and dimensions of the metal core can be appropriately set depending on the processing amount of the molten metal, the processing temperature, the type and flow rate of the molten metal processing agent to be circulated, and the like.

「耐火物層」を構成する耐火材料の種類は特に限定されず、例えば、耐スポーリング性に優れるアルミナ−シリカ系、ハイアルミナ系、アルミナ−クロム系耐火材料や、耐熱衝撃性や耐食性に優れるアルミナ−マグネシア系耐火材料を使用することができる。また、一つのランスパイプに形成される耐火物層は、単一種類の耐火材料により構成されるものであっても、部分的に異なる種類の耐火材料が配されるものであっても構わない。更に、耐火物層は、キャスタブル耐火材料の泥しょうを固化、乾燥させたキャスタブル耐火物層であっても、加圧成形工程を経て形成された定形耐火物層であっても、両者を複合させた耐火物層であっても良い。   The type of the refractory material constituting the “refractory layer” is not particularly limited. For example, the alumina-silica-based, high-alumina-based, and alumina-chromium-based refractory materials having excellent spalling resistance, and excellent thermal shock resistance and corrosion resistance. An alumina-magnesia refractory material can be used. Further, the refractory layer formed on one lance pipe may be composed of a single type of refractory material, or may be partially provided with different types of refractory material. . Furthermore, the refractory layer may be a castable refractory layer obtained by solidifying and drying the castable refractory material mud, or a regular refractory layer formed through a pressure forming process. It may be a refractory layer.

「固体の溶湯処理剤」としては、CaO、FeO、NaCO、CaF等、粉末状、顆粒状、粒状、小塊状の処理剤を例示することができる。なお、本発明のランスパイプは固体の溶湯処理剤を溶融金属に供給するものであるが、固体の溶湯処理剤に加えて気体や液体を溶融金属に供給するものであっても良い。 Examples of the “solid molten metal treatment agent” include powdery, granular, granular and small lump treatment agents such as CaO, FeO, Na 2 CO 3 and CaF 2 . In addition, although the lance pipe of this invention supplies a molten metal processing agent to a molten metal, in addition to a solid molten metal processing agent, you may supply gas and a liquid to a molten metal.

「金属製の突片」は、鋼や合金鋼等の金属で形成することができ、材質は芯金と同一であっても相違していても良い。また、「芯金の内径」は、芯金が円形の場合は直径を指しており、芯金が楕円形の場合は、「突片」が突出している方向に伸びる仮想の直線が、芯金の内部空間を横切る長さを指している。   The “metal protrusion” can be formed of a metal such as steel or alloy steel, and the material may be the same as or different from that of the cored bar. The “inner diameter of the metal core” indicates the diameter when the metal core is circular, and when the metal core is oval, a virtual straight line extending in the direction in which the “projection piece” projects is a core metal. Refers to the length across the interior space.

一般的に、ランスパイプは、芯金の直管部がほぼ鉛直となる状態、或いは、直管部が鉛直より少し傾けられた状態で溶融金属に浸漬される。そして、導入口から導入された溶湯処理剤は、重力に従って直管部の内部空間を落下し、曲管部の内周面に衝突した後、曲管部の内部空間を落下する。上記構成の本発明により、突片が直管部の内周面に設けられている場合は、突片が溶湯処理剤の落下運動に対する抵抗となり、曲管部の内周面に溶湯処理剤が衝突する際の衝撃が低減される。これにより、溶湯処理剤の衝突による芯金の損耗を低減することができ、ランスパイプの耐用期間を長期化することができる。   Generally, the lance pipe is immersed in the molten metal in a state where the straight pipe portion of the core metal is substantially vertical or in a state where the straight pipe portion is slightly inclined from the vertical. And the molten metal processing agent introduce | transduced from the inlet port falls in the internal space of a straight pipe part according to gravity, and falls in the internal space of a curved pipe part, after colliding with the internal peripheral surface of a curved pipe part. When the projecting piece is provided on the inner peripheral surface of the straight pipe portion according to the present invention having the above configuration, the projecting piece becomes a resistance against the dropping movement of the molten metal treatment agent, and the molten metal treatment agent is placed on the inner peripheral surface of the curved pipe portion. Impact at the time of collision is reduced. Thereby, the wear of the metal core due to the collision of the molten metal treatment agent can be reduced, and the service life of the lance pipe can be extended.

また、曲管部において、落下する溶湯処理剤の衝突によって芯金が損耗し易い部分は、曲管部の湾曲に対して外側となる方向の内周面である。そのため、上記構成により突片が曲管部に設けられている場合は、部分的ではあっても、損耗し易い部分で芯金が厚くなっているのと同様の構成となり、溶湯処理剤の衝突による芯金の損耗を低減することができる。また、溶湯処理剤の落下運動が突片によって妨げられることにより、突片の上流側に溶湯処理剤が溜まり易い。これにより、溜まった溶湯処理剤によって、損耗し易い部分で芯金の内周面が保護されるため、溶湯処理剤の衝突による損耗を低減することができる。   Further, in the curved pipe portion, the portion where the core metal is easily worn out by the collision of the falling molten metal processing agent is the inner peripheral surface in the direction that is on the outer side with respect to the curvature of the curved pipe portion. Therefore, when the projecting piece is provided on the curved pipe portion by the above configuration, it becomes the same configuration as the core metal is thickened in the portion that is easily worn out even if it is partial, and the collision of the molten metal treatment agent It is possible to reduce the wear of the metal core due to the above. In addition, since the drop movement of the molten metal treatment agent is hindered by the protruding piece, the molten metal treatment agent tends to accumulate on the upstream side of the protruding piece. Thereby, since the inner peripheral surface of the metal core is protected by the accumulated molten metal processing agent at a portion that is easily worn out, wear due to the collision of the molten metal processing agent can be reduced.

ここで、突片が突出している高さが低すぎる場合は上記の作用が十分に発揮されず、逆に、突片が高すぎる場合は芯金の詰まりにつながり溶融金属への溶湯処理剤の供給が阻害される。本発明では、突片が突出している高さを芯金の内径の1/20〜1/2としたことにより、後述のように、上記の作用を十分に発揮させつつ、溶融金属に溶湯処理剤を問題なく供給することができる。なお、突片が突出している高さは芯金の内径の約1/6であれば、特に望ましい。   Here, when the height at which the projecting piece protrudes is too low, the above-mentioned effect is not sufficiently exhibited. Conversely, when the projecting piece is too high, the core metal is clogged and the molten metal treatment agent to the molten metal Supply is disturbed. In the present invention, the height at which the protruding piece protrudes is set to 1/20 to 1/2 of the inner diameter of the cored bar, so that the molten metal is processed to the molten metal while sufficiently exhibiting the above-described action as described later. The agent can be supplied without problems. It is particularly desirable that the height at which the protruding piece protrudes is about 1/6 of the inner diameter of the cored bar.

また、突片は芯金と同じく金属製であるため、溶接によって芯金の内周面に取り付けることができる。これにより、突片は芯金の内周面に強固に固着され脱落しにくいと共に、取り付ける作業も、芯金の内周面に沿って肉盛り溶接する場合と比べて極めて容易に行うことができる。   Further, since the projecting piece is made of metal like the core metal, it can be attached to the inner peripheral surface of the core metal by welding. As a result, the projecting piece is firmly fixed to the inner peripheral surface of the cored bar and is not easily dropped off, and the attaching operation can be performed very easily as compared with the case of overlay welding along the inner peripheral surface of the cored bar. .

本発明にかかるランスパイプは、「前記突片は、前記直管部の前記曲管部側の端部において、前記曲管部の湾曲に対して外側となる方向の内周面に設けられている」ものとすることができる。   The lance pipe according to the present invention is described as follows: "The projecting piece is provided on an inner peripheral surface of the straight pipe portion on the curved pipe portion side in a direction outward from the curved pipe portion. Can be. "

曲管部において、曲管部の湾曲に対して外側となる方向の内周面のうち、落下する溶湯処理剤の衝突によって最も損耗し易い部分は、芯金が曲がり始める部分、すなわち、直管部との境界付近である。本発明では、上記構成により、芯金が最も損耗し易い部分の直ぐ上流側である直管部端部に、突片が設けられる。これにより、溶湯処理剤はこの突片に当たって散乱し、最も芯金が損耗し易い部分は突片の陰となって、溶湯処理剤の衝突から守られる。その結果、溶湯処理剤の衝突による芯金の損耗を、有効に低減することができる。なお、突片が複数設けられる場合、他の突片は別の位置に設けることができる。   In the curved pipe portion, the portion of the inner peripheral surface in the direction that is on the outer side with respect to the curvature of the curved pipe portion is the portion that is most likely to be worn by the collision of the molten metal treatment agent. It is near the boundary with the department. In the present invention, with the above configuration, the projecting piece is provided at the end portion of the straight pipe portion that is immediately upstream of the portion where the core metal is most easily worn. Thereby, the molten metal treatment agent hits the projecting piece and is scattered, and the portion where the core metal is most easily worn becomes the shade of the projecting piece and is protected from the collision of the molten metal treatment agent. As a result, the wear of the metal core due to the collision of the molten metal treatment agent can be effectively reduced. When a plurality of projecting pieces are provided, the other projecting pieces can be provided at different positions.

本発明にかかるランスパイプは、「前記突片は、前記曲管部において複数が所定間隔で列設されている」ものとすることができる。   In the lance pipe according to the present invention, “a plurality of the projecting pieces are arranged at predetermined intervals in the curved pipe portion”.

複数が所定間隔で列設された突片と突片の間には、突片の高さ分の深さを有する溝部が形成されることとなる。そのため、突片によって落下運動が妨げられた溶湯処理剤は、この溝部に溜まり易い。   A groove having a depth corresponding to the height of the projecting piece is formed between the projecting pieces arranged in a plurality at predetermined intervals. Therefore, the molten metal treatment agent whose drop movement is hindered by the projecting piece is likely to be accumulated in the groove.

従って、本発明によれば、曲管部の損耗し易い部分の内周面において、溝部に捕集された溶湯処理剤の層が形成される。これにより、溶湯処理剤の衝突によって損耗し易い部分が、溶湯処理剤自体によって保護される効果を高め、より有効に芯金の損耗を低減することができる。   Therefore, according to this invention, the layer of the molten metal processing agent collected by the groove part is formed in the internal peripheral surface of the part which is easy to wear out of a curved pipe part. Thereby, the part which is easy to be worn out by the collision of the molten metal treatment agent can be enhanced by the effect of being protected by the molten metal treatment agent itself, and the wear of the metal core can be reduced more effectively.

以上のように、本発明の効果として、芯金に曲がっている部分を有するランスパイプであって、粉末など固体の溶湯処理剤を導入しても芯金が損耗し難く、且つ、容易に製造することができるランスパイプを、提供することができる。   As described above, as an effect of the present invention, a lance pipe having a bent portion in a core metal, the core metal is not easily worn even when a solid melt treatment agent such as powder is introduced, and is easily manufactured. A lance pipe can be provided.

本実施形態のランスパイプの縦断面図である。It is a longitudinal cross-sectional view of the lance pipe of this embodiment. 図1におけるA範囲の拡大図である。It is an enlarged view of A range in FIG. (a)Y1−Y1線端面図、(b)Y2−Y2線端面図である。(A) Y1-Y1 line end view, (b) Y2-Y2 line end view. 実施例1のランスパイプを4ch使用後に、各突片の高さ、及び、その近傍での芯金の厚さを測定した結果を示すグラフである。It is a graph which shows the result of having measured the height of each protrusion and the thickness of the metal core in the vicinity after using 4ch of the lance pipe of Example 1. FIG. 突片の形状に関して他の実施形態を示す横断面図である。It is a cross-sectional view which shows other embodiment regarding the shape of a protrusion. 他の実施形態としてL字形のランスパイプを示す縦断面図である。It is a longitudinal cross-sectional view which shows the L-shaped lance pipe as other embodiment.

以下、本発明の一実施形態であるランスパイプの構成について、図1乃至図3に基づいて説明する。   Hereinafter, the structure of the lance pipe which is one Embodiment of this invention is demonstrated based on FIG. 1 thru | or FIG.

本実施形態のランスパイプは1、金属製で円管状の芯金10、及び、芯金10の外周面を被覆する耐火物層20を備え、固体の溶湯処理剤を溶融金属に供給するランスパイプであって、芯金10は、溶湯処理剤が導入される導入口21から直線状に伸びる直管部11、及び、直管部11から湾曲して延設される曲管部12を備え、直管部11の内周面、及び、曲管部12において曲管部12の湾曲に対して外側となる方向の内周面から、芯金10の内径の1/20〜1/2の高さ突出している複数の金属製の突片P1〜P9を具備している。   The lance pipe of the present embodiment includes a metal-made core metal 10 and a refractory layer 20 that covers the outer peripheral surface of the core metal 10 and supplies a molten metal treatment agent to the molten metal. The cored bar 10 includes a straight pipe portion 11 that extends linearly from an introduction port 21 into which a molten metal treatment agent is introduced, and a curved pipe portion 12 that is curved and extends from the straight pipe portion 11. From the inner peripheral surface of the straight pipe portion 11 and the inner peripheral surface of the curved pipe portion 12 in the direction of the outer side with respect to the curve of the curved pipe portion 12, the height of 1/20 to 1/2 of the inner diameter of the cored bar 10 A plurality of protruding metal pieces P1 to P9 are provided.

より詳細に説明すると、芯金10は、鋼や合金鋼等の耐熱性を有する金属で、断面が略円形の長尺管状に形成されている。そして、本実施形態の芯金10は、図1にL1で示した範囲の直管部11、及び、L2で示した範囲の曲管部12に加え、更に曲管部12の直管部11とは反対側の端部から延設された図示L3範囲の第二直管部13を備えており、導入口21から導入された溶湯処理剤は、第二直管部13の開口部22から溶融金属に供給される。   More specifically, the core metal 10 is a metal having heat resistance such as steel or alloy steel, and is formed in a long tubular shape having a substantially circular cross section. And the cored bar 10 of this embodiment is the straight pipe part 11 of the curved pipe part 12 in addition to the straight pipe part 11 of the range shown by L1 in FIG. 1, and the curved pipe part 12 of the range shown by L2. The second straight pipe portion 13 in the range of L3 in the drawing extended from the opposite end portion is provided, and the melt treatment agent introduced from the introduction port 21 passes through the opening 22 of the second straight pipe portion 13. Supplied to molten metal.

本実施形態のランスパイプは1、九つの突片P1〜P9を備えており、そのうち突片P2は直管部11の曲管部12側の端部に設けられ、突片P1は直管部11において突片P2の近傍に設けられている。他の突片P3〜P9は、曲管部12から第二直管部13にかけて、所定間隔で列設されている。なお、以下では、突片P1〜P9を特に区別する必要がない場合は、突片Pと総称して説明する。   The lance pipe of the present embodiment includes one and nine projecting pieces P1 to P9, of which the projecting piece P2 is provided at the end of the straight pipe part 11 on the curved pipe part 12 side, and the projecting piece P1 is a straight pipe part. 11 is provided in the vicinity of the projecting piece P2. The other protruding pieces P3 to P9 are arranged in rows from the bent pipe portion 12 to the second straight pipe portion 13 at a predetermined interval. In the following description, the protrusions P1 to P9 will be collectively referred to as the protrusions P when it is not necessary to distinguish them.

また、突片Pは金属製で、図3(a)に図2におけるY1−Y1線端面図(突片P1)を示すように略かまぼこ型であり、かまぼこ型の湾曲面を芯金10の内周面に当接させて、芯金10に対して溶接されている。なお、突片Pは何れも同形であり、図2におけるX−X1線端面、X−X2線端面、X−X3線端面、X−X4線端面、X−X5線端面、及びZ−Z線端面は、それぞれの切断線を紙面左右方向とすれば、図3(a)と同一に表れる。また、突片Pはそれぞれ芯金10の中心線Nに対して直交する方向に突出しており、本実施形態では突片が突出している高さhは芯金10の内径2rの約1/6に設定されている。   Further, the projecting piece P is made of metal and has a substantially semi-cylindrical shape as shown in FIG. 3A, which is an end view of the Y1-Y1 line in FIG. 2 (projecting piece P 1). The metal core 10 is welded so as to contact the inner peripheral surface. Note that each of the projecting pieces P has the same shape, and is an end surface taken along line X-X1, line X-X2, end face X-X3, end face X-X4, end face X-X5, and line Z-Z in FIG. The end surface appears the same as FIG. 3A when the respective cutting lines are in the horizontal direction of the paper. Further, each of the projecting pieces P protrudes in a direction orthogonal to the center line N of the cored bar 10. In this embodiment, the height h at which the projected piece projects is about 1/6 of the inner diameter 2r of the cored bar 10. Is set to

上記構成により、本実施形態のランスパイプ1によれば、曲管部12の湾曲に対して外側となる方向の内周面において、芯金10が最も損耗し易い部分であって、芯金10が曲がり始める部分の直ぐ上流に突片P1及び突片P2が存在する。そのため、溶湯処理剤はこれらの突片P1,P2に当たって散乱するため、最も損耗し易い部分の芯金10は溶湯処理剤の衝突から免れ易く、この部分での芯金10の損耗を低減することができる。   With the above configuration, according to the lance pipe 1 of the present embodiment, the cored bar 10 is the portion that is most easily worn on the inner peripheral surface in the direction that is on the outer side with respect to the curve of the curved pipe part 12. There are the projecting piece P1 and the projecting piece P2 immediately upstream of the portion where the bending starts. Therefore, since the molten metal treatment agent is scattered by hitting these projecting pieces P1 and P2, the core metal 10 in the portion that is most likely to be worn is easy to avoid the collision of the molten metal treatment agent, and the wear of the metal core 10 in this portion is reduced. Can do.

加えて、直管部11に設けられた突片P1,P2は、直管部11を落下する溶湯処理剤に対して抵抗として作用する。これにより、曲管部12の内周面に溶湯処理剤が衝突する際の衝撃が低減され、芯金10の損耗を低減することができる。   In addition, the projecting pieces P <b> 1 and P <b> 2 provided on the straight pipe part 11 act as resistance against the molten metal treatment agent falling on the straight pipe part 11. Thereby, the impact at the time of a molten metal processing agent colliding with the internal peripheral surface of the curved pipe part 12 is reduced, and wear of the metal core 10 can be reduced.

また、曲管部12においては、列設された突片P3〜P7によって落下運動を妨げられた溶湯処理剤が、これら複数の突片間に形成される溝部に堆積し易い。これにより、堆積した溶湯処理剤の層によって、損耗し易い部分で芯金10の内周面が保護されるため、溶湯処理剤の衝突による損耗を低減することができる。   Moreover, in the curved pipe part 12, the molten metal processing agent from which the drop movement was prevented by the lined protrusions P3 to P7 is likely to be deposited in the groove part formed between the plurality of protrusions. Thereby, since the inner peripheral surface of the cored bar 10 is protected by the deposited layer of the molten metal treatment agent at a portion that is easily worn away, wear due to the collision of the molten metal treatment agent can be reduced.

更に、突片Pは芯金10と同じく金属製であるため、溶接によって芯金10の内周面に強固かつ容易に取り付けることができる。   Further, since the projecting piece P is made of metal like the core metal 10, it can be firmly and easily attached to the inner peripheral surface of the core metal 10 by welding.

圧力配管用炭素鋼製で内径約55mm、厚さ約4mmの芯金に、同材質の突片を上記と同様の配置で九つ設けたランスパイプS1〜S4、及び、芯金の材質、内径、及び厚さはランスパイプS1〜S4と同一であるが突片を全く設けない従来のランスパイプS0を用いて、実際に溶融金属に粉末状の溶湯処理剤を供給する作業をそれぞれ同条件で行った。ここで、ランスパイプS1〜S4における突片の高さは、芯金の内径に対してそれぞれ約1/20、1/6、1/2、3/5であり、一つのランスパイプにおいて九つの突片の高さは同一とした。結果を、表1にまとめて示す。   Lance pipes S1 to S4, made of carbon steel for pressure piping, with a core metal having an inner diameter of about 55 mm and a thickness of about 4 mm, provided with nine protrusions of the same material in the same arrangement as described above, and the material and inner diameter of the core metal , And the thickness is the same as that of the lance pipes S1 to S4, but using the conventional lance pipe S0 that does not have any protruding piece, the operation of actually supplying the molten metal treatment agent to the molten metal under the same conditions. went. Here, the heights of the projecting pieces in the lance pipes S1 to S4 are about 1/20, 1/6, 1/2, 3/5, respectively, with respect to the inner diameter of the cored bar. The height of the projecting pieces was the same. The results are summarized in Table 1.

Figure 2010222592
Figure 2010222592

突片を有しない従来のランスパイプS0では、2ch(チャージ)使用後に、曲管部における芯金の損耗が激しく、芯金の厚さがほとんどゼロとなる部分が生じたため、その後の使用は不可能となった。ここで、最も損耗が著しかった部分は、本実施形態のランスパイプにおいて突片P2〜P4を設けた位置に相当する部分、すなわち、芯金が曲がり始める部分であった。また、突片の高さが芯金の内径の約1/20であるランスパイプS1は3ch使用後に、芯金の損耗によってその後の使用は不可能となった。   In the conventional lance pipe S0 having no projecting piece, after the use of 2ch (charge), the core metal in the bent pipe portion is severely worn, and there is a portion where the thickness of the core metal becomes almost zero. It has become possible. Here, the portion where the wear was most remarkable was a portion corresponding to the position where the projecting pieces P2 to P4 were provided in the lance pipe of the present embodiment, that is, a portion where the core metal started to bend. Further, the lance pipe S1 having a height of the projecting piece of about 1/20 of the inner diameter of the cored bar becomes unusable after 3ch use due to wear of the cored bar.

一方、突片の高さが芯金の内径の約1/2であるランスパイプS4では3ch使用後に、突片の高さが芯金の内径の約3/5であるランスパイプS5では1chの使用で、芯金に詰まりが生じて溶湯処理剤の供給ができなくなった。   On the other hand, the lance pipe S4 having a projection piece height of about 1/2 of the inner diameter of the core bar uses 3 ch, and the lance pipe S5 having a projection piece height of about 3/5 of the inner diameter of the core bar is 1 ch. In use, the cored bar was clogged, and the melt treatment agent could not be supplied.

これに対し、突片の高さが芯金の内径の約1/6(約9mm)であるランスパイプS3は、芯金が損耗するまで7chの使用が可能であり、7chの使用後にも芯金に詰まりは生じていなかった。ここで、ランスパイプS3を4ch使用した後に、各突片の高さ、及び、その近傍での芯金の厚さを測定した結果を図4に示す。   On the other hand, the lance pipe S3 having a protruding piece height of about 1/6 (about 9 mm) of the inner diameter of the core bar can be used for 7 ch until the core bar is worn out, and the core after the 7 ch is used. There was no clogging in the gold. Here, after using 4ch of lance pipe S3, the result of having measured the height of each protrusion and the thickness of the core metal in the vicinity is shown in FIG.

図4から、最も上流側にある突片P1の損耗が最も大きく、その直ぐ下流側の突片P2及びP3はそれほど損耗していないことが分かる。これにより、突片P2及びP3の設けられた部分は、ランスパイプS0に関する結果から分かるように溶湯処理剤の衝突によって損耗しやすい部分であるにも関わらず、突片P1の影となって溶湯処理剤による衝撃から免れていると考えられた。また、突片P4から突片P6にかけては、突片P1ほどではないまでも損耗が見られ、突片P1では遮ることができなかった溶湯処理剤の衝撃を、この部分の突片で受けていると考えられた。そして、各突片の間の溝部では、芯金の厚さの減少は見られなかった。   It can be seen from FIG. 4 that the protrusion P1 on the most upstream side has the greatest wear, and the protrusions P2 and P3 on the immediately downstream side are not so worn. As a result, the portion provided with the projecting pieces P2 and P3 becomes a shadow of the projecting piece P1 even though it is a portion that is easily worn out by the collision of the molten metal treatment agent as can be seen from the result regarding the lance pipe S0. It was thought that they were immune from the impact of the treatment agent. In addition, from the protrusion P4 to the protrusion P6, wear was observed even if not as much as the protrusion P1, and the impact of the molten metal treatment agent that could not be blocked by the protrusion P1 was received by this protrusion. It was thought that there was. And in the groove part between each protrusion, the reduction | decrease of the thickness of the metal core was not seen.

上記の結果から、突片を設けることによって、芯金の損耗が有効に防止されていることが確認された。そして、突片の高さが芯金の内径の約1/20〜1/2であれば、芯金に詰まりを生じることなく、実用的な処理回数である3ch以上の使用が可能であった。更に、突片の高さが芯金の内径の約1/6であれば、従来のランスパイプS0に比べて耐用期間を非常に長期化することができ、特に良好であった。   From the above results, it was confirmed that the wear of the metal core was effectively prevented by providing the projecting pieces. If the height of the protruding piece is about 1/20 to 1/2 of the inner diameter of the cored bar, it is possible to use the cored bar for 3 channels or more, which is a practical number of treatments, without clogging the cored bar. . Furthermore, if the height of the projecting piece is about 1/6 of the inner diameter of the cored bar, the service life can be greatly prolonged as compared with the conventional lance pipe S0, which is particularly favorable.

以上、本発明について好適な実施形態を挙げて説明したが、本発明は上記の実施形態に限定されるものではなく、以下に示すように、本発明の要旨を逸脱しない範囲において、種々の改良及び設計の変更が可能である。   The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements can be made without departing from the scope of the present invention as described below. And design changes are possible.

例えば、本実施形態では、突片Pがかまぼこ型であり、芯金10の内部側に平坦な面を向けている場合を例示したが、これに限定されず、図5(a),(b)に例示するように、芯金の内部側となる面が湾曲している形状の突片Q,Rとすることができる。   For example, in the present embodiment, the case where the projecting piece P has a semi-cylindrical shape and a flat surface faces the inner side of the cored bar 10 is exemplified, but the present invention is not limited to this, and FIGS. ), The projecting pieces Q and R having a curved surface on the inner side of the cored bar can be obtained.

また、上記では、突片を複数設ける場合を例示したが、突片は一つでも良い。この場合は、直管部の曲管部側の端部において、曲管部の湾曲に対して外側となる方向の内周面に設ければ、最も損耗を受けやすい部分に衝突する前に溶湯処理剤を散乱させることができ、好適である。   In the above description, a case where a plurality of projecting pieces are provided has been illustrated, but one projecting piece may be provided. In this case, if the straight pipe portion is provided on the inner peripheral surface in the direction of the outer side with respect to the bending of the curved pipe portion at the end portion on the curved pipe portion side, the molten metal is allowed to collide with the most susceptible to wear. The treatment agent can be scattered, which is preferable.

更に、芯金が単層構造の場合を図示して説明したが、二重構造の芯金を用い、内側の芯金に対して突片を設ける構成とすることもできる。更に、上記では曲管部を備えるランスパイプとしてJ字形のものを例示したが、図6に示すように、L字形のランスパイプ2にも本発明を適用することができる。このランスパイプ2は金属製で円管状の芯金30、及び、芯金30の外周面を被覆する耐火物層20を備えており、芯金30は、範囲M1に相当する直管部31、範囲M2に相当する曲管部32、及び、範囲M3に相当する第二直管部33から構成され、直管部31と第二直管部33とはほぼ直角を形成している。   Furthermore, although the case where the cored bar has a single-layer structure has been illustrated and described, it is also possible to use a double-structured cored bar and provide a protruding piece with respect to the inner cored bar. Furthermore, in the above description, a J-shaped lance pipe having a curved pipe portion is exemplified, but the present invention can also be applied to an L-shaped lance pipe 2 as shown in FIG. The lance pipe 2 is provided with a metal-made tubular cored bar 30 and a refractory layer 20 covering the outer peripheral surface of the cored bar 30. The cored bar 30 includes a straight pipe portion 31 corresponding to the range M1, It is comprised from the curved pipe part 32 corresponded to the range M2, and the 2nd straight pipe part 33 corresponded to the range M3, and the straight pipe part 31 and the 2nd straight pipe part 33 form the substantially right angle.

1,2 ランスパイプ
10,30 芯金
11 直管部(芯金10)
12 曲管部(芯金10)
13 第二直管部(芯金10)
20 耐火物層
21 導入口
31 直管部(芯金30)
32 曲管部(芯金30)
33 第二直管部(芯金30)
1, 2, Lance pipe 10, 30 Core 11 Straight pipe part (Core 10)
12 Curved pipe (core 10)
13 Second straight pipe (core 10)
20 Refractory layer 21 Inlet 31 Straight pipe part (core 30)
32 Curved pipe (core 30)
33 Second straight pipe section (core 30)

特開平9−287017号公報JP-A-9-287017

Claims (3)

金属製で円管状の芯金、及び、該芯金の外周面を被覆する耐火物層を備え、固体の溶湯処理剤を溶融金属に供給するランスパイプであって、
前記芯金は、溶湯処理剤が導入される導入口から直線状に伸びる直管部、及び、該直管部から湾曲して延設される曲管部を備え、
前記芯金の直管部の内周面、または/及び、前記曲管部において前記曲管部の湾曲に対して外側となる方向の内周面から、前記芯金の内径の1/20〜1/2の高さ突出している一以上の金属製の突片を具備する
ことを特徴とするランスパイプ。
A lance pipe comprising a metal-made tubular cored bar and a refractory layer covering the outer peripheral surface of the cored bar, and supplying a molten metal treatment agent to the molten metal,
The core bar includes a straight pipe portion that extends linearly from an introduction port into which the melt treatment agent is introduced, and a curved pipe portion that is curved and extended from the straight pipe portion,
From the inner peripheral surface of the straight pipe portion of the core metal and / or the inner peripheral surface of the curved pipe portion in the direction of the outer side with respect to the curve of the curved pipe portion, 1/20 of the inner diameter of the core metal. A lance pipe comprising one or more metal protrusions protruding at a height of 1/2.
前記突片は、前記直管部の前記曲管部側の端部において、前記曲管部の湾曲に対して外側となる方向の内周面から突出していることを特徴とする請求項1に記載のランスパイプ。   2. The projecting piece according to claim 1, wherein the projecting piece protrudes from an inner peripheral surface of the straight pipe portion on the curved pipe portion side in a direction outward from the curved portion of the curved pipe portion. Lance pipe as described. 前記突片は、前記曲管部において複数が所定間隔で列設されていることを特徴とする請求項1または請求項2に記載のランスパイプ。   The lance pipe according to claim 1, wherein a plurality of the projecting pieces are arranged at predetermined intervals in the bent pipe portion.
JP2009007322A 2009-01-16 2009-01-16 Lance pipe Active JP4897002B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009007322A JP4897002B2 (en) 2009-01-16 2009-01-16 Lance pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009007322A JP4897002B2 (en) 2009-01-16 2009-01-16 Lance pipe

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2010188342A Division JP5690100B2 (en) 2010-08-25 2010-08-25 Lance pipe

Publications (2)

Publication Number Publication Date
JP2010222592A true JP2010222592A (en) 2010-10-07
JP4897002B2 JP4897002B2 (en) 2012-03-14

Family

ID=43040103

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009007322A Active JP4897002B2 (en) 2009-01-16 2009-01-16 Lance pipe

Country Status (1)

Country Link
JP (1) JP4897002B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2013069573A1 (en) * 2011-11-08 2015-04-02 株式会社フジコー Curved overlay welding method and lance manufacturing method using the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50138794U (en) * 1974-05-02 1975-11-14
JPS57126321A (en) * 1981-01-28 1982-08-06 Hitachi Plant Eng & Constr Co Ltd Granular powder transport pipe
JPH072340U (en) * 1993-06-14 1995-01-13 川崎製鉄株式会社 Duct for powder transportation
JP2000239728A (en) * 1999-02-16 2000-09-05 Kenji Maruta Blowing tube for molten iron

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50138794U (en) * 1974-05-02 1975-11-14
JPS57126321A (en) * 1981-01-28 1982-08-06 Hitachi Plant Eng & Constr Co Ltd Granular powder transport pipe
JPH072340U (en) * 1993-06-14 1995-01-13 川崎製鉄株式会社 Duct for powder transportation
JP2000239728A (en) * 1999-02-16 2000-09-05 Kenji Maruta Blowing tube for molten iron

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2013069573A1 (en) * 2011-11-08 2015-04-02 株式会社フジコー Curved overlay welding method and lance manufacturing method using the same

Also Published As

Publication number Publication date
JP4897002B2 (en) 2012-03-14

Similar Documents

Publication Publication Date Title
TWI356814B (en)
JP5690100B2 (en) Lance pipe
JP2011017529A5 (en)
EP2537610B1 (en) Metal-flow impact pad and diffuser for tundish
JP2010222592A (en) Lance pipe
JP4742855B2 (en) Molten metal refining lance
JP2007125605A (en) Ladle for molten steel treatment
CN103917321B (en) Curved surface weld overlay method and lance manufacturing method employing same
JP4821360B2 (en) Blast furnace tilt injection
JP5546345B2 (en) Gas blow lance
JP2006104531A (en) Ti-CONTAINING STAINLESS STEEL MANUFACTURING METHOD
TWI294464B (en) Tapping pipe
JP6215092B2 (en) Vacuum degassing equipment
JP4670116B2 (en) Contactless bends that do not touch the package
JP5462669B2 (en) Gas blow lance
JPH0426434Y2 (en)
RU173094U1 (en) BUCKET FOR BOTTOM METAL BLOWING WITH GAS IN THE DUCK
UA82304C2 (en) Tuyere for desulfurization of cast-iron by granular magnesium in heavy scoops
JP5340533B2 (en) Lance pipe
JP2007246960A (en) Molten iron trough for blast furnace
JP3713041B1 (en) Outlet sleeve
JP2011184762A (en) Impeller for stirring molten metal
JP6084245B2 (en) Lance pipe
JP2007262546A (en) Slag removing device
JP5546344B2 (en) Gas blow lance

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100825

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20100826

A911 Transfer to examiner for re-examination before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A911

Effective date: 20101206

A912 Re-examination (zenchi) completed and case transferred to appeal board

Free format text: JAPANESE INTERMEDIATE CODE: A912

Effective date: 20101224

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110914

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20110914

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20110914

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20111018

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20111221

R150 Certificate of patent or registration of utility model

Ref document number: 4897002

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150106

Year of fee payment: 3

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250