JP2684923B2 - Method and apparatus for gas coated casting of deoxidized copper etc. - Google Patents
Method and apparatus for gas coated casting of deoxidized copper etc.Info
- Publication number
- JP2684923B2 JP2684923B2 JP4136898A JP13689892A JP2684923B2 JP 2684923 B2 JP2684923 B2 JP 2684923B2 JP 4136898 A JP4136898 A JP 4136898A JP 13689892 A JP13689892 A JP 13689892A JP 2684923 B2 JP2684923 B2 JP 2684923B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- mold
- reducing gas
- casting
- semi
- 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.)
- Expired - Lifetime
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- Continuous Casting (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、銅又は銅合金、特に脱
酸銅を連続鋳造する場合に適用して好適なガス被覆鋳造
方法及び装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas coating casting method and apparatus suitable for continuous casting of copper or copper alloy, especially deoxidized copper.
【０００２】[0002]
【従来の技術】脱酸銅の鋳造に当たっては、可能な限り
銅の酸化を抑制する必要があり、先に本発明者等の１名
は、他の２名と共同して特公昭６１−１０２１７号公報
記載のガス被覆鋳造方法を発明した。この鋳造方法は、
タンディシュと鋳型との間を空間を気密に保持してその
内部に還元性ガスを供給し、鋳型内の溶湯表面を還元性
ガスの雰囲気をもって被覆することによって溶銅の酸化
を防止しようとするものである。2. Description of the Related Art In casting deoxidized copper, it is necessary to suppress the oxidation of copper as much as possible. First, one of the inventors of the present invention collaborated with the other two of Japanese Patent Publication No. 61-10217. Invented the gas coating casting method described in the publication. This casting method
A space between the tundish and the mold is kept airtight, a reducing gas is supplied into the space, and the surface of the molten metal in the mold is covered with an atmosphere of the reducing gas to prevent the oxidation of molten copper. Is.
【０００３】この従来技術は、溶湯が鋳型内で凝固する
際、内部に溶け込んでいた水素や窒素が気泡となって放
出され、それが溶湯表面で弾ける結果、同表面から溶湯
が飛散してタンディシュの下面に付着する点で問題があ
る。タンディシュに付着した銅は、容易に剥離して再び
鋳型内に落下し、インゴットの品質を低下させる原因と
なるからである。このほか、従来技術では、タンディシ
ュと鋳型との間を気密に保持しているため、多量の還元
性ガスを連続して供給することが出来ない点や使用後の
還元性ガスの排出が充分に行なわれない点でも問題があ
る。According to this prior art, when the molten metal is solidified in the mold, hydrogen and nitrogen which have been melted inside are released as bubbles, and the bubbles are released on the surface of the molten metal. There is a problem in that it adheres to the lower surface of the. This is because the copper attached to the tundish easily peels off and falls into the mold again, which causes the quality of the ingot to deteriorate. In addition, in the prior art, since the space between the tundish and the mold is kept airtight, it is not possible to continuously supply a large amount of reducing gas, and sufficient reducing gas is exhausted after use. There is also a problem in that it is not done.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、前記
の従来技術の問題点を解消し、理想的なガス被覆条件の
もとで脱酸銅等の連続鋳造を行なうことが出来る改良さ
れた方法及び装置を提供することにある。SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems of the prior art and to improve continuous casting of deoxidized copper or the like under ideal gas coating conditions. Another object of the present invention is to provide a method and apparatus.
【０００５】[0005]
【課題を解決するための手段】上記課題は、還元性ガス
充満用の空間を鋳型の頭部内に独立して設けるととも
に、当該空間を半密閉構造とすることによって解決する
ことが出来る。この種の半密閉空間は、例えば鋳型の上
にガス供給用フランジ部材を配設し、当該部材の上に所
定の寸法の制限開口又は隙間を有する天井仕切板を配設
することによって構成することが可能である。The above problems can be solved by providing a space for filling the reducing gas independently in the head of the mold, and by making the space a semi-sealed structure. This kind of semi-enclosed space should be constructed, for example, by arranging a gas supply flange member on the mold and arranging a ceiling partition plate having a limiting opening or gap of a predetermined size on the member. Is possible.
【０００６】鋳型頭部の半密閉空間に供給された還元性
ガスは、高温状態の溶湯（１１２０〜１１６０℃）に触
れて直ちに燃焼（酸化）する結果、ほぼ完全に無害化さ
れた状態で外部に排出することが可能である。このた
め、たとえ一酸化炭素のような有害ガスを還元性ガスと
して使用するような場合であっても、安全上その他の点
で特に問題になることがない。寧ろ、本発明の場合は、
鋳型の頭部が半密閉空間となっているため、当該空間に
多量の還元性ガスを連続的に供給することが可能とな
り、理想的な条件をもって溶湯表面をガス被覆しながら
連続鋳造を行なうことが出来る。The reducing gas supplied to the semi-enclosed space at the top of the mold comes into contact with the molten metal (1120 to 1160 ° C.) in a high temperature state and immediately burns (oxidizes). As a result, the reducing gas is almost completely rendered harmless to the outside. It is possible to discharge it. Therefore, even if a harmful gas such as carbon monoxide is used as the reducing gas, there is no particular problem in safety and other respects. Rather, in the case of the present invention,
Since the head of the mold is a semi-closed space, it is possible to continuously supply a large amount of reducing gas to the space, and to perform continuous casting while gas coating the molten metal surface under ideal conditions. Can be done.
【０００７】天井仕切板は、半密閉空間を形成するため
の区画部材として使用するほか、溶湯表面からの飛散銅
を捕捉するための部材としても機能する。このため、同
仕切板は、飛散銅が付着し易くて剥離し難い性質を有す
るほか、熱伝導や耐熱性において優れていることが必要
であり、通常は、表面に細かい凹凸や溝を設けた銅製の
板を使用することが望ましい。また、この仕切板は、鋳
造の合間の交換が可能なように着脱可能な構造としてお
けば、必要に応じて再利用することが出来て好都合であ
る。The ceiling partition plate is used not only as a partition member for forming a semi-enclosed space, but also as a member for capturing scattered copper from the surface of the molten metal. Therefore, the partition plate is required to have excellent properties in terms of thermal conductivity and heat resistance, in addition to the property that scattered copper is easily attached and difficult to peel off. Usually, fine unevenness or grooves are provided on the surface. It is desirable to use a copper plate. Further, if the partition plate has a detachable structure so that it can be exchanged between castings, it is convenient because it can be reused as necessary.
【０００８】半密閉空間に供給する還元性ガスの組成
は、前記の従来技術の場合と同様、一酸化炭素、水素、
二酸化炭素及び窒素とすることが望ましい。このほか、
還元性ガスは、溶湯の表面を保温すると同時に水分の侵
入を防止するため、加熱乾燥状態で供給することが望ま
しく、また、鋳型内の溶湯表面を均一にガス被覆するた
め、旋回流の形で供給することが望ましい。The composition of the reducing gas supplied to the semi-enclosed space is the same as in the case of the above-mentioned prior art, carbon monoxide, hydrogen,
Carbon dioxide and nitrogen are preferred. other than this,
It is desirable to supply the reducing gas in a heated and dried state in order to keep the surface of the molten metal warm and at the same time to prevent the ingress of moisture. Also, in order to uniformly cover the molten metal surface in the mold with a gas, it should be in the form of a swirling flow. It is desirable to supply.
【０００９】[0009]
【実施例】以下、図１〜図３に示した一実施例を参照し
ながら本発明を更に詳細に説明する。図１において、タ
ンディシュ１内の溶湯１１は、ストッパー１２によって
流量の調節を受けた後、浸漬ノズル２を通って水冷鋳型
５の内部に連続的に注入される。一方、ブタンガスを燃
焼させることによって得た還元性ガス１７は、脱水器１
６によって脱水（乾燥）された後、ガス加熱器１４によ
って所定の温度まで昇温され、導管９を通ってガス供給
用フランジ部材４内に供給される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the embodiment shown in FIGS. In FIG. 1, the melt 11 in the tundish 1 is continuously injected into the water-cooled mold 5 through the immersion nozzle 2 after the flow rate is adjusted by the stopper 12. On the other hand, the reducing gas 17 obtained by burning butane gas is the dehydrator 1
After being dehydrated (dried) by 6, the temperature is raised to a predetermined temperature by the gas heater 14 and supplied into the gas supply flange member 4 through the conduit 9.
【００１０】フランジ部材４は、第一のシール材３ａを
介して水冷鋳型５の頭部に配設されており、更にその上
に、第二のシール材３ｂを介して天井仕切板１３が配設
されている。同仕切板の中心部には、浸漬ノズル２の外
径より若干大きい内径の貫通孔１９が設けられており、
この貫通孔を通って浸漬ノズル２が水冷鋳型５の内部ま
で延びている。この結果、フランジ部材４と天井仕切板
１３とによって囲まれた部分が半密閉空間８として機能
する。The flange member 4 is disposed on the head of the water-cooled mold 5 via the first sealing material 3a, and the ceiling partition plate 13 is further disposed thereon via the second sealing material 3b. It is set up. A through hole 19 having an inner diameter slightly larger than the outer diameter of the immersion nozzle 2 is provided at the center of the partition plate.
The immersion nozzle 2 extends into the water-cooled mold 5 through the through hole. As a result, the portion surrounded by the flange member 4 and the ceiling partition plate 13 functions as the semi-enclosed space 8.
【００１１】フランジ部材４には、中心方向に対して一
定の角度を持たせた複数のガス噴出孔１０が設けられ、
また、流入した還元性ガス１７の流れを分散させるため
の整流板１８が設けられている（図２及び図３参照）。
このため、フランジ部材４内に流入した還元性ガス１７
は、複数のガス噴出孔１０から半密閉空間８の内部へ旋
回流となって噴出し、鋳型５内の溶湯表面２０を均一に
被覆する。なお、図１において、６は水冷鋳型５に流入
する冷却水、７は鋳型５によって鋳造されたインゴッ
ト、１５は加熱器１４の加熱バーナー、２１は水冷鋳型
５の内部に設けた整流板を夫々示す。The flange member 4 is provided with a plurality of gas ejection holes 10 having a certain angle with respect to the central direction.
A rectifying plate 18 is provided to disperse the flow of the inflowing reducing gas 17 (see FIGS. 2 and 3).
Therefore, the reducing gas 17 flowing into the flange member 4
Is jetted as a swirling flow from the plurality of gas ejection holes 10 into the inside of the semi-enclosed space 8 to uniformly cover the molten metal surface 20 in the mold 5. In FIG. 1, 6 is cooling water flowing into the water-cooled mold 5, 7 is an ingot cast by the mold 5, 15 is a heating burner of the heater 14, 21 is a straightening plate provided inside the water-cooled mold 5, respectively. Show.
【００１２】本実施例における具体的な鋳造条件は、次
の通りとした。 鋳造速度 ２４０（mm／min） 鋳型冷却水量 ８００〜１０００（ｌ／min） タンディシュ内溶湯温度 １１７０〜１２００℃ 還元性ガス組成 ＣＯ：３〜１５％ Ｈ2 ：５％以下 残部：ＣＯ2＋Ｎ2 還元性ガス温度 ４００℃以下 還元性ガス流量 ５０〜１５０（ｌ／min） 鋳造速度を２００mm／min 以下にすると、還元性ガスに
よる保温効果が現れないため、鋳型内の凝固シェルが溶
湯表面近くまで上昇し、湯じわが発生する。一方、鋳造
速度を２５０〜３００mm／min 程度まで増加させると、
インゴット中央部の割れ発生の確立が高くなる。なお、
還元性ガスの発生源は、ブタンガスの代わりにプロパン
ガスや天然ガス等を使用することも可能である。The concrete casting conditions in this example were as follows. Casting speed 240 (mm / min) Mold cooling water amount 800 to 1000 (l / min) Tundish melt temperature 1170 to 1200 ° C Reducing gas composition CO: 3 to 15% H 2 : 5% or less Remainder: CO 2 + N 2 reduction Reducing gas temperature 400 ° C or less Reducing gas flow rate 50 to 150 (l / min) When the casting speed is 200 mm / min or less, the heat retaining effect by the reducing gas does not appear, so the solidified shell in the mold rises to near the surface of the molten metal. However, hot water wrinkles occur. On the other hand, if the casting speed is increased to about 250 to 300 mm / min,
The probability of cracking in the center of the ingot increases. In addition,
As a source of the reducing gas, it is possible to use propane gas, natural gas or the like instead of butane gas.
【００１３】[0013]
【発明の効果】本発明の場合は、鋳型内の溶湯表面の空
間を半密閉構造としたため、多量の還元性ガスを連続的
に供給することが可能となり、理想的な条件で溶湯表面
をガス被覆しながら連続鋳造を行なうことが出来る。ま
た、半密閉空間の構成部材として天井仕切板を採用して
いるので、同部材を飛散銅の捕捉部材としても兼用する
ことにより、タンディシュの下面に飛散銅が付着するこ
とを防止することが出来る。この仕切板は、着脱可能に
配設することが可能であるから、必要に応じて再利用す
ることが出来て極めて好都合である。In the case of the present invention, since the space on the surface of the molten metal in the mold has a semi-enclosed structure, a large amount of reducing gas can be continuously supplied, and the molten metal surface can be fed under ideal conditions. Continuous casting can be performed while coating. Further, since the ceiling partition plate is adopted as a constituent member of the semi-enclosed space, by also using the same member as a catching member for the scattered copper, it is possible to prevent the scattered copper from adhering to the lower surface of the tundish. . Since this partition plate can be detachably arranged, it can be reused as needed, which is extremely convenient.
【図１】本発明の一実施例を説明するためのガス被覆鋳
造装置の断面図。FIG. 1 is a sectional view of a gas coating casting apparatus for explaining an embodiment of the present invention.
【図２】図１のガス被覆鋳造装置のフランジ部材部分を
示す平面図。FIG. 2 is a plan view showing a flange member portion of the gas coating casting apparatus of FIG.
【図３】同じく図１のガス被覆鋳造装置のフランジ部材
部分を示す断面図。FIG. 3 is a sectional view showing a flange member portion of the gas coating casting apparatus of FIG.
１…タンディシュ ２…浸漬ノズル ３…シール材 ４…ガス供給用フランジ部材 ５…水冷鋳型 ６…冷却水 ７…インゴット ８…半密閉空間 ９…導管 １０…ガス噴出孔 １１…溶湯 １２…ストッパー １３…天井仕切板 １５…加熱バーナー １４…ガス加熱器 １６…脱水器 １７…還元性ガス １８…還元性ガス整流板 １９…貫通孔 ２０…溶湯表面 ２１…冷却水整流板 DESCRIPTION OF SYMBOLS 1 ... Tundish 2 ... Immersion nozzle 3 ... Sealing material 4 ... Gas supply flange member 5 ... Water cooling mold 6 ... Cooling water 7 ... Ingot 8 ... Semi-enclosed space 9 ... Conduit 10 ... Gas ejection hole 11 ... Molten metal 12 ... Stopper 13 ... Ceiling partition plate 15 ... Heating burner 14 ... Gas heater 16 ... Dehydrator 17 ... Reducing gas 18 ... Reducing gas straightening plate 19 ... Through hole 20 ... Molten metal surface 21 ... Cooling water straightening plate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 杉野 昭雄 茨城県土浦市木田余町3550番地 日立電 線株式会社 土浦工場内 (72)発明者 大内 豊 茨城県土浦市木田余町3550番地 日立電 線株式会社 土浦工場内 (56)参考文献 特開 平２−52148（ＪＰ，Ａ) 特公 昭61−10217（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akio Sugino 3550, Kidayo-cho, Tsuchiura-shi, Ibaraki Hitachi Electric Cable Co., Ltd. Tsuchiura factory (72) Inventor Yutaka Ouchi 3550, Kidayo-cho, Tsuchiura-shi, Ibaraki Hitachi Electric Line Tsuchiura factory (56) References JP-A-2-52148 (JP, A) JP 61-10217 (JP, B2)
Claims (5)
て鋳型に注入することによって連続鋳造を行う方法にお
いて、還元性ガスを雰囲気として充満させるための半密
閉空間を鋳型の頭部に独立して設け、当該空間内に加熱
乾燥状態の還元性ガスを旋回流にして供給することによ
り、当該還元性ガスをもって鋳型内の溶湯表面を被覆す
ることを特徴とする脱酸銅等のガス被覆鋳造方法。1. A method of performing continuous casting by injecting the molten metal in a tundish into a mold through a dipping nozzle, wherein a semi-enclosed space for filling a reducing gas as an atmosphere is independently provided in the head of the mold. A gas coated casting method for deoxidized copper or the like, characterized in that the surface of the molten metal in the mold is coated with the reducing gas in a swirling flow by supplying the reducing gas in a heated and dried state into the space.
酸化炭素及び窒素であることを特徴とする請求項１に記
載のガス被覆鋳造方法。2. The gas coating casting method according to claim 1, wherein the composition of the reducing gas is carbon monoxide, hydrogen, carbon dioxide and nitrogen.
シュ内の溶湯を注入するための手段と、鋳型の頭部内に
独立して設けた還元性ガス充満用の半密閉空間と、当該
空間に加熱乾燥状態の還元性ガスを連続して供給するた
めの手段とを備え、還元性ガスを供給するための手段が
半密閉空間に還元性ガスの旋回流を生ぜしめるための手
段を有することを特徴とする脱酸銅等のガス被覆鋳造装
置。3. A casting mold for continuous casting, a means for injecting the molten metal in the tundish into the casting mold, a semi-enclosed space for independently filling a reducing gas in the head of the casting mold, The space is provided with a means for continuously supplying a reducing gas in a dried state, and a means for supplying the reducing gas is
Hands for producing a swirling flow of reducing gas in a semi-enclosed space
A gas coating casting apparatus for deoxidized copper or the like, which has a step .
給用フランジ部材と当該部材の上に配設した所定の寸法
の制限開口又は隙間を有する天井仕切板とをもって構成
されていることを特徴とする請求項３に記載のガス被覆
鋳造装置。4. The semi-enclosed space is provided with a gas provided above the mold.
Feeding flange member and the predetermined size arranged on the member
Consists of a ceiling partition plate with a limited opening or gap
Gas coated casting apparatus according to claim 3, characterized in that it is.
ていることを特徴とする請求項４に記載のガス被覆鋳造
装置。5. The ceiling partition plate is arranged so as to be removable.
The gas coating casting apparatus according to claim 4 , wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4136898A JP2684923B2 (en) | 1992-05-28 | 1992-05-28 | Method and apparatus for gas coated casting of deoxidized copper etc. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4136898A JP2684923B2 (en) | 1992-05-28 | 1992-05-28 | Method and apparatus for gas coated casting of deoxidized copper etc. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05329600A JPH05329600A (en) | 1993-12-14 |
| JP2684923B2 true JP2684923B2 (en) | 1997-12-03 |
Family
ID=15186144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4136898A Expired - Lifetime JP2684923B2 (en) | 1992-05-28 | 1992-05-28 | Method and apparatus for gas coated casting of deoxidized copper etc. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2684923B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6110217A (en) * | 1984-06-26 | 1986-01-17 | Matsushita Electric Ind Co Ltd | Flyback transformer |
| JP2523806B2 (en) * | 1988-08-12 | 1996-08-14 | 株式会社日立製作所 | Continuous casting machine and method thereof |
-
1992
- 1992-05-28 JP JP4136898A patent/JP2684923B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05329600A (en) | 1993-12-14 |
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