JPH02137645A - Casting apparatus for solidifying below molten metal surface - Google Patents
Casting apparatus for solidifying below molten metal surfaceInfo
- Publication number
- JPH02137645A JPH02137645A JP28872388A JP28872388A JPH02137645A JP H02137645 A JPH02137645 A JP H02137645A JP 28872388 A JP28872388 A JP 28872388A JP 28872388 A JP28872388 A JP 28872388A JP H02137645 A JPH02137645 A JP H02137645A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- refractory wall
- cooling
- storing vessel
- cooling 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.)
- Pending
Links
- 238000005266 casting Methods 0.000 title claims abstract description 14
- 239000002184 metal Substances 0.000 title abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 238000007711 solidification Methods 0.000 claims abstract description 16
- 230000008023 solidification Effects 0.000 claims abstract description 16
- 238000003860 storage Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910002804 graphite Inorganic materials 0.000 abstract description 3
- 239000010439 graphite Substances 0.000 abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011796 hollow space material Substances 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、特に中空材を製造する連続鋳造装置に関し、
詳しくは場面より下方に設けられたモールドで凝固を行
う、場面下、凝固鋳造装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention particularly relates to a continuous casting apparatus for manufacturing hollow materials.
More specifically, the present invention relates to an apparatus for solidifying and casting under the scene, which performs solidification in a mold provided below the scene.
（従来の技術）
湯面下凝固鋳造では、溶鋼湯面より下方で凝固を開始さ
せる為、モールドより上にある溶鋼の静圧がそのままシ
ェルにかかる。従って湯面下凝固鋳造により得られる鋳
片は微細で精緻な組織が得られることや、パウダーを用
いない為、表面性状が改善される等の特徴を有する。(Prior Art) In subsurface solidification casting, solidification of molten steel starts below the surface of the molten steel, so the static pressure of the molten steel above the mold is directly applied to the shell. Therefore, the slabs obtained by submerged solidification casting have features such as a fine and precise structure and improved surface properties because no powder is used.
ただ上記鋳造方式では、凝固点開始点（例えば溶鋼の場
合１５５０℃）を確実に湯面より下方の冷却用モールド
に持って行くことが必要である。However, in the above casting method, it is necessary to ensure that the starting point of the solidification point (for example, 1550° C. in the case of molten steel) is brought to the cooling mold below the molten metal level.
一般に湯面下凝固鋳造の構成は、溶鋼を冷却する冷却用
モールドへ溶鋼を溶鋼貯留槽から供給するのに耐火壁を
介し接続されている。Generally, in the configuration of submerged solidification casting, molten steel is supplied from a molten steel storage tank to a cooling mold that is connected via a refractory wall.
（参考技術、特開昭６１−１９５７４０号）従って特に
冷却モールドから鋳片の引き抜き速度が遅い時、溶鋼貯
留槽での溶鋼の滞留時間が長い場合や、装置中央に水冷
した中子を設は中空材を製造する場合には、何らかの温
度補償をしないと場面或いは耐火物壁から凝固する場合
がある。(Reference technology, Japanese Patent Application Laid-open No. 61-195740) Therefore, especially when the rate of withdrawal of slabs from the cooling mold is slow, when the residence time of molten steel in the molten steel storage tank is long, or when a water-cooled core is installed in the center of the equipment, When producing hollow members, solidification may occur from the field or from the refractory walls unless some temperature compensation is provided.
例えば湯面に生じたシェルは中子上部で成長する場合や
、凝固組織が下方に沈下しそこを基点としてあらたに組
織が成長する場合もある。For example, a shell formed on the surface of the hot water may grow above the core, or the solidified structure may sink downward and a new structure may grow from there as a starting point.
また耐火壁に生じた凝固シェルをそのまま引き抜くと、
耐火壁に損傷を与えたり、表面性状に悪影響を与えたり
することもある。Also, if you pull out the solidified shell that has formed on the fireproof wall,
It can also damage fire walls and adversely affect surface quality.
そこで冷却用モールドと溶鋼貯留槽の間で冷却が起きな
いようにする為の装置が必要である。Therefore, a device is required to prevent cooling from occurring between the cooling mold and the molten steel storage tank.
この装置として、第５図に示す装置の如く、高周波加熱
用コイル１１を設け、誘導電流により溶鋼５の外周部を
加熱する方法が考えられている。As this device, a method has been considered in which a high-frequency heating coil 11 is provided and the outer circumference of the molten steel 5 is heated by an induced current, as in the device shown in FIG.
しかし、従来の高周波加熱用コイルにより加熱する方法
では、磁束分布により極端に温度差が生じる為、ピーク
領域を越えると加熱の効果は著しく失われる。また高周
波コイル１１の下方に設けられる冷却モールド１２への
漏洩磁束等の影響により効率をあまり大きくすることが
できない等の欠点がある。However, in the conventional heating method using a high-frequency heating coil, an extreme temperature difference occurs due to the magnetic flux distribution, so the heating effect is significantly lost when the peak region is exceeded. Further, there is a drawback that the efficiency cannot be increased very much due to the influence of leakage magnetic flux to the cooling mold 12 provided below the high frequency coil 11.
特にコストの高い電力を用いることから、効率はそのま
ま製造コストへ大きく影響する為無視できない問題であ
る。In particular, since high-cost electric power is used, efficiency has a significant effect on manufacturing costs, so it is a problem that cannot be ignored.
（発明が解決しようとする課題）
そこで本発明では従来のコストの高い電力を用いる高周
波加熱用コイルにより加熱する方法を用いずに簡易な構
成で、湯面下凝固を安定して行い、鋳造組織・表面性状
の優れた鋳片を安価に製造する為の湯面下凝固鋳造装置
を提供することにある。(Problems to be Solved by the Invention) Therefore, in the present invention, solidification under the surface of the molten metal is stably performed with a simple configuration without using the conventional heating method using a high-frequency heating coil that uses high-cost electric power, and the cast structure is improved. - To provide a submerged solidification casting apparatus for manufacturing slabs with excellent surface properties at low cost.
（課題を解決するための手段）
本発明は、溶鋼貯留槽２とその下方に設けた冷却モール
ド１との間に耐火壁４を連結して構成し、該耐火壁４を
囲むようにバーナー３を配すると共に、溶鋼貯留槽２の
外部に該バーナー３から出た排ガスの通路６を設けたこ
とを特徴とする湯面下凝固鋳造装置である。(Means for Solving the Problems) The present invention is constructed by connecting a fireproof wall 4 between a molten steel storage tank 2 and a cooling mold 1 provided below the tank, and a burner 3 that surrounds the fireproof wall 4. This subsurface solidification casting apparatus is characterized in that a passage 6 for the exhaust gas discharged from the burner 3 is provided outside the molten steel storage tank 2.
なお７は溶ｗｉ５が冷却モールド１で凝固して形成され
るシェルである。Note that 7 is a shell formed by solidifying the melt wi 5 in the cooling mold 1.
（作用）
本発明は溶鋼貯留槽２とその下方に設けた冷却モールド
１との間に耐火壁４が連結して構成されており、この耐
火壁４を囲むようにバーナー３が設けられている為、バ
ーナー３の火焔で耐火壁４が加熱され、耐火壁４内を溶
鋼が通過する時に生じる温度低下が補償され、この部分
での溶鋼５の凝固を防止し、確実に溶鋼５は冷却モール
ｌ” １の位置において冷却を作用を受ける。(Function) The present invention is constructed by connecting a fireproof wall 4 between a molten steel storage tank 2 and a cooling mold 1 provided below the tank, and a burner 3 is provided so as to surround this fireproof wall 4. Therefore, the fireproof wall 4 is heated by the flame of the burner 3, and the temperature drop that occurs when the molten steel passes through the fireproof wall 4 is compensated for, preventing the molten steel 5 from solidifying in this part, and ensuring that the molten steel 5 is cooled in the cooling mold. Cooling is applied at position 1.
また溶ｗＩ５が耐火壁４の内部位置での通過時に生じる
温度低下が補償されることに伴って、冷却モールド１で
の凝固は、一定の冷却状態が維持出来ると共に、冷却モ
ールド１で生成するシェルフには溶鋼５の一定な静圧が
加わるように作用するので、鋳造される鋳片は鋳造組織
・表面性状の優れた製品となる。In addition, since the temperature drop that occurs when the molten wI5 passes through the internal position of the fireproof wall 4 is compensated for, solidification in the cooling mold 1 can maintain a constant cooling state, and the shelf generated in the cooling mold 1 can be Since a constant static pressure of the molten steel 5 is applied to the molten steel 5, the cast slab becomes a product with excellent casting structure and surface quality.
なお溶鋼５の凝固の生成は、加熱されている耐火壁４で
始まらないことにより耐火壁４を損傷することが防止さ
れ、炉寿命を延長させ、また耐火壁４の補修等の作業を
軽減させることも出来る。Note that solidification of the molten steel 5 does not start on the heated refractory wall 4, thereby preventing damage to the refractory wall 4, extending the life of the furnace, and reducing work such as repairing the refractory wall 4. You can also do that.
また耐火壁４を加熱した後の排ガスは、耐火壁４の外周
から溶鋼貯留槽２の周りに設けである排ガス通路６を介
し外部に排気されるが、排ガス通路６内で溶鋼貯留槽２
に熱を伝達させ、溶鋼貯留槽２内での温度補償をも可能
としている。Further, the exhaust gas after heating the fireproof wall 4 is exhausted from the outer periphery of the fireproof wall 4 to the outside through an exhaust gas passage 6 provided around the molten steel storage tank 2.
This also enables temperature compensation within the molten steel storage tank 2.
（実施例） 以下本発明を図面に基づいた実施例で詳述する。(Example) The present invention will be described in detail below with reference to embodiments based on the drawings.
第１図は本発明の断面図であり、溶鋼貯留槽２と例えば
水冷式の冷却モールド１の間に耐火壁４を介し接続して
いる。この耐火壁４は例えばアルミナ系の耐火材を用い
ている。FIG. 1 is a sectional view of the present invention, in which a molten steel storage tank 2 and, for example, a water-cooled cooling mold 1 are connected via a fireproof wall 4. This fireproof wall 4 is made of, for example, an alumina-based fireproof material.
耐火壁４の周りには、第２図に示す如く例えば３個のバ
ーナー３が配置されて、バーナー３の火焔で耐火壁４を
加熱可能としている。For example, three burners 3 are arranged around the fireproof wall 4 as shown in FIG. 2, so that the fireproof wall 4 can be heated by the flames of the burners 3.
バーナー３の種類、及び数は特に限定するものではない
が、耐火壁４を均一に加熱し、耐火壁４の温度補償を行
う為に用いるものであるから、ある程度高温雰囲気に出
来る能力を備えていることが必要である。The type and number of burners 3 are not particularly limited, but since they are used to uniformly heat the fireproof wall 4 and compensate for the temperature of the fireproof wall 4, they must have the ability to create a high temperature atmosphere to some extent. It is necessary to be present.
耐火壁４の周囲から溶鋼貯留槽２の周囲には第１図〜第
３図に示す如く排ガスを通過させる排ガス通路６が設け
られている。From the periphery of the fireproof wall 4 to the periphery of the molten steel storage tank 2, there is provided an exhaust gas passage 6 through which exhaust gas passes, as shown in FIGS. 1 to 3.
溶鋼貯留槽２には溶鋼５が貯留されている。Molten steel 5 is stored in the molten steel storage tank 2 .
この熔ｗｉ５は耐火壁４内から下方に設けられていろ水
冷している中子８により環状に中空状の形状となり、冷
却モールド１で冷却されて凝固しシェルフの厚みを増し
つつ、ピンチローラ９より下方に引き抜かれ、中空材が
形成される。This melt wi5 becomes an annular hollow shape by a water-cooled core 8 provided below from within the fireproof wall 4, and is cooled and solidified in the cooling mold 1, increasing the thickness of the shelf while pinch rollers 9 It is pulled further downward to form a hollow member.
なお中子８の上部は断熱されており、冷却モールド１の
近傍から冷却が開始される。Note that the upper part of the core 8 is insulated, and cooling starts near the cooling mold 1.
第４図は耐火壁４、冷却モールド１部分の拡大断面図で
あり、図中１０は鋳片離れを良くする為のグラファイト
である。FIG. 4 is an enlarged cross-sectional view of the fireproof wall 4 and the cooling mold 1, and 10 in the figure is graphite for improving the separation of slabs.
上述の構成で、バーナー３の燃料として液化プロパンの
燃焼バーナー３を用いた実施例について述べる。An example will be described in which a liquefied propane combustion burner 3 with the above-described configuration is used as the fuel for the burner 3.
バーナー３の火焔の温度が２０００℃の時、溶鋼貯留槽
２の周りの排ガス通路６の温度は１５００℃であり、排
ガス通路６の出口では１２００°Ｃであった。この状態
で溶鋼貯留槽２に入れている温度１６００℃の溶鋼５を
、速度１ ｍ ／ ｓでピンチローラ９で下方に引き抜
きを行い鋳造を行った（この時耐火壁４の温度は、内表
面１０曹識の位置で１５５０℃であった）。鋳造された
鋳片は表面性状の良好なものが得られた。When the flame temperature of the burner 3 was 2000°C, the temperature of the exhaust gas passage 6 around the molten steel storage tank 2 was 1500°C, and the temperature at the outlet of the exhaust gas passage 6 was 1200°C. In this state, the molten steel 5 at a temperature of 1600°C placed in the molten steel storage tank 2 was pulled downward at a speed of 1 m/s by the pinch rollers 9 to perform casting. The temperature was 1550°C at the 10th grade point). The cast slabs had good surface properties.
またバーナー３による加熱を行わず同様の条件で鋳造を
行った場合には、耐火壁４の温度は１２００°Ｃとなり
、溶鋼が凝固し引き抜きが不可部になった。従って本発
明によって耐火壁４の部分に３５０℃の温度補償を行う
ことが出来た。Further, when casting was performed under the same conditions without heating with the burner 3, the temperature of the fireproof wall 4 was 1200°C, and the molten steel solidified and became impossible to draw. Therefore, according to the present invention, it was possible to perform temperature compensation of 350° C. on the fireproof wall 4 portion.
なお上述の実施例に於いて図示してないが、排ガス通路
６の溶鋼貯留槽２を経由した直後に熱交換器を設は排熱
回収を行うことにより、極めて高効率のエネルギー利用
も可能である。Although not shown in the above embodiment, by installing a heat exchanger immediately after the molten steel passes through the molten steel storage tank 2 in the exhaust gas passage 6 and recovering the exhaust heat, it is possible to use energy with extremely high efficiency. be.
（発明の効果）
本発明によれば、ｆ４鋼貯留槽と冷却モールドの接続部
分に存する耐火壁自体をバーナーで加熱させ適切な温度
補償がなされ、内部を通過する溶鋼の凝固点開始点を確
実に冷却用モールドとすることが出来る為に、耐火壁に
損傷を与えたり、湯面に生じたシェルが中子上部で成長
すること、或いは凝固組織が溶鋼内の下方に沈下しそこ
を基点としてあらたに組織が成長する場合を未然に防止
し、湯面下凝固を安定して行い、鋳造組織・表面性状の
優れた中空材鋳片を提供することが出来る。(Effects of the Invention) According to the present invention, the fireproof wall itself existing at the connection part between the F4 steel storage tank and the cooling mold is heated by a burner, and appropriate temperature compensation is performed, and the solidification point start point of the molten steel passing through the inside is ensured. Because it can be used as a cooling mold, it may cause damage to the refractory wall, a shell formed on the surface of the molten steel may grow on the upper part of the core, or the solidified structure may sink downward in the molten steel and form a new base from there. It is possible to prevent the formation of a structure in advance, to stably perform subsurface solidification, and to provide a hollow slab with an excellent casting structure and surface quality.
また誘導電流を用いる方法ではない為、コストの高い電
力を用いずに安価な天然ガス、コークスガスその他の市
販されているガス等を利用出来る為、製造コストを大幅
に軽減することが出来る等優れた効果を有する。In addition, since the method does not use induced current, it is possible to use inexpensive natural gas, coke gas, and other commercially available gases without using expensive electricity, making it possible to significantly reduce manufacturing costs. It has a good effect.
第１図は本発明の断面図、第２図は同上のＡＡｌｌｌ断
面図、第３図は同上のＢ−Ｂ線断面図、第４図は耐火壁
、冷却モールド部分の部分拡大断面図、第５図は従来例
を示す断面図である。
１は冷却モールド、２は溶鋼貯留槽、３はバーナ、４は
耐火壁、５は溶鋼、６は排ガス通路、７はシェル、８は
中子、９はピンチローラ、１０はグラファイト、１１は
高周波コイル、１２は冷却モールド。
特許出願人 新日本製鐵株式会社Fig. 1 is a sectional view of the present invention, Fig. 2 is an AAll sectional view of the same as above, Fig. 3 is a sectional view taken along line B-B of the same as above, Fig. 4 is a partial enlarged sectional view of the fireproof wall and cooling mold part, FIG. 5 is a sectional view showing a conventional example. 1 is a cooling mold, 2 is a molten steel storage tank, 3 is a burner, 4 is a fireproof wall, 5 is molten steel, 6 is an exhaust gas passage, 7 is a shell, 8 is a core, 9 is a pinch roller, 10 is graphite, 11 is a high frequency Coil, 12 is cooling mold. Patent applicant Nippon Steel Corporation
Claims (1)
火壁を連結して構成し、該耐火壁を囲むようにバーナー
を配すると共に、溶鋼貯留槽の外部に該バーナーから出
た排ガスの通路を設けたことを特徴とする湯面下凝固鋳
造装置。A fireproof wall is connected between the molten steel storage tank and a cooling mold provided below it, and a burner is arranged to surround the fireproof wall. A submerged solidification casting device characterized by having a passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28872388A JPH02137645A (en) | 1988-11-17 | 1988-11-17 | Casting apparatus for solidifying below molten metal surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28872388A JPH02137645A (en) | 1988-11-17 | 1988-11-17 | Casting apparatus for solidifying below molten metal surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02137645A true JPH02137645A (en) | 1990-05-25 |
Family
ID=17733854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28872388A Pending JPH02137645A (en) | 1988-11-17 | 1988-11-17 | Casting apparatus for solidifying below molten metal surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02137645A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894590A (en) * | 2019-03-28 | 2019-06-18 | 北京科技大学 | A kind of continuous casting installation for casting and method of major diameter copper alloy tube |
-
1988
- 1988-11-17 JP JP28872388A patent/JPH02137645A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894590A (en) * | 2019-03-28 | 2019-06-18 | 北京科技大学 | A kind of continuous casting installation for casting and method of major diameter copper alloy tube |
| CN109894590B (en) * | 2019-03-28 | 2021-05-04 | 北京科技大学 | Continuous casting equipment and method for large-diameter copper alloy pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4168013A (en) | High temperature insulating container | |
| JPH0813111A (en) | Hot dip galvanizing equipment | |
| US2286481A (en) | Induction furnace | |
| JPH02137645A (en) | Casting apparatus for solidifying below molten metal surface | |
| US4455014A (en) | Production of refractory linings or walls | |
| US3213495A (en) | Means for preventing segregation in vacuum arc melting | |
| US2997512A (en) | Coreless electric induction furnace | |
| JPS6032114B2 (en) | Ladle for metallurgy | |
| JPH059542A (en) | Molten metal vessel | |
| CN106319157A (en) | RH refining induction heating temperature compensation device and application method thereof | |
| JPH07103660A (en) | Cold wall induction melting furnace | |
| JPS59202142A (en) | Heating method of nozzle to be immersed into tundish | |
| JPH017704Y2 (en) | ||
| CN213984521U (en) | Push plate furnace for graphite purification | |
| JPS59190327A (en) | Method for keeping hot slab hot | |
| JPH0421819Y2 (en) | ||
| JPH04329814A (en) | Molten metal vessel | |
| JPS6013017A (en) | Vacuum vessel for treatment of metal | |
| JPS6347538B2 (en) | ||
| CA1133248A (en) | High temperature insulating container | |
| JPS5848551Y2 (en) | Furnace construction structure for stationary nonferrous metallurgical furnaces | |
| JPH0318032Y2 (en) | ||
| JPH01162719A (en) | Gas-cooled skid | |
| Genies | Refractories Used for Melting and Holding of Ferrous Alloys Sintering of Refractory Rammed Linings With Oxygen | |
| JPH03243727A (en) | Induction melting method for active metal |