JP3076306B2 - Condensate retention equipment for low temperature hearth refining. - Google Patents
Condensate retention equipment for low temperature hearth refining.Info
- Publication number
- JP3076306B2 JP3076306B2 JP10248094A JP24809498A JP3076306B2 JP 3076306 B2 JP3076306 B2 JP 3076306B2 JP 10248094 A JP10248094 A JP 10248094A JP 24809498 A JP24809498 A JP 24809498A JP 3076306 B2 JP3076306 B2 JP 3076306B2
- Authority
- JP
- Japan
- Prior art keywords
- hearth
- condensate
- alloy
- refining
- holding device
- 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 - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/22—Remelting metals with heating by wave energy or particle radiation
- C22B9/228—Remelting metals with heating by wave energy or particle radiation by particle radiation, e.g. electron beams
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1295—Refining, melting, remelting, working up of titanium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/02—Crowns; Roofs
- F27D1/025—Roofs supported around their periphery, e.g. arched roofs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、合金の低温炉床精
錬中に発生した金属蒸気の凝縮物を採集し、保持する装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for collecting and holding a condensate of metal vapor generated during low-temperature hearth refining of an alloy.
【０００２】[0002]
【従来の技術】合金の電子ビーム低温炉床精錬におい
て、電子ビームガンのようなエネルギー源により、エネ
ルギーを、水冷炉床内に含まれる精錬すべき合金に向け
ている。そのような合金の典型的な精錬装置が、例え
ば、米国特許第5,171,357号および同第5,222,547号に記
載されている。多くの場合、例えば、様々なチタン合金
のような、精錬される合金は、その合金中に他の元素よ
りも高い蒸気圧および／または低い融点を有し、したが
って、他の元素よりも優先的に蒸発する元素を含有す
る。精錬工程中に蒸発する金属は典型的に、例えば、米
国特許第3,690,635号に記載されているような、凝縮物
スクリーン上に採集される。合金成分の蒸気圧および融
点の差のために、凝縮物は通常、精錬される合金とは異
なる組成を有しており、精錬後に所望の合金組成を提供
するために、通常、供給材料において、凝縮物に対する
成分の損失を考慮に入れている。BACKGROUND OF THE INVENTION In electron beam cryogenic hearth refining of alloys, an energy source, such as an electron beam gun, directs energy to the alloy to be refined contained in the water cooled hearth. Typical refining equipment for such alloys is described, for example, in U.S. Patent Nos. 5,171,357 and 5,222,547. In many cases, the alloy to be refined, for example, various titanium alloys, has a higher vapor pressure and / or a lower melting point than the other elements in the alloy, and thus has a higher priority than the other elements. Contains elements that evaporate. Metals that evaporate during the refining process are typically collected on a condensate screen, for example, as described in US Pat. No. 3,690,635. Due to the differences in vapor pressures and melting points of the alloy components, the condensate typically has a different composition than the alloy being refined, and to provide the desired alloy composition after refining, typically in the feed, The loss of components to the condensate is taken into account.
【０００３】しかしながら、スクリーン上または低温炉
床炉の内面に付着する凝縮物はしばしば、精錬工程が完
了するまで確実に保持されるように適切には付着せず、
不確定の割合の凝縮物が炉床内の材料中に落下してもど
り、それによって、精錬された生成物の組成が予期でき
ぬ様式で影響を受けるかもしれない。ある場合には、例
えば、米国特許第5,222,547号のように、精錬工程中に
採集した凝縮物の全てを炉床内の材料に戻す試みにおい
て、凝縮物がその上に採集される凝縮物スクリーンを振
動させている。そのような振動スクリーン装置は、複雑
であり、振動分離装置を必要としている。精錬された合
金の組成における変動性にはしばしば、化学的均一性必
要条件を満たすために、凝縮物に対する成分の損失のた
めに生じる真空アーク再溶解段階が必要である。元の精
錬中の凝縮物変動が十分に厳しい場合には、合金は、真
空アーク再溶融後でさえも仕様を満たさないかもしれ
ず、このため、収量損失が著しく、追加の加工費用が発
生し、出荷が遅くなってしまうこともある。[0003] However, condensate that adheres to the screen or to the inner surface of the cold hearth furnace often does not adhere properly to ensure that it is retained until the refining process is completed.
An undefined proportion of the condensate may fall back into the material in the hearth, thereby affecting the composition of the refined product in an unexpected manner. In some cases, for example, in U.S. Pat. Vibrating. Such vibrating screen devices are complex and require a vibration separator. Variability in the composition of the smelted alloy often requires a vacuum arc remelting step that occurs due to loss of components to the condensate to meet chemical uniformity requirements. If the condensate fluctuations during the original refining are severe enough, the alloy may not meet specifications even after vacuum arc remelting, resulting in significant yield losses and additional processing costs, Shipment may be delayed.
【０００４】[0004]
【発明が解決しようとする課題】したがって、本発明の
目的は、従来技術の欠点を克服した、低温炉床精錬用の
凝縮物保持装置を提供することにある。SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a condensate holding device for cryogenic hearth refining which overcomes the disadvantages of the prior art.
【０００５】本発明の別の目的は、精錬中に蒸発する合
金成分を、精錬された合金を汚染させずに、それによっ
て効果的に保持できる、低温炉床精錬用の凝縮物保持装
置を提供することにある。[0005] Another object of the present invention is to provide a condensate holding device for low temperature hearth refining, which can effectively retain alloy components that evaporate during refining without contaminating the refined alloy. Is to do.
【０００６】[0006]
【課題を解決するための手段】本発明のこれらと他の目
的は、低温炉床精錬炉内の炉床の上に水冷凝縮物保持表
面を提供して、脆くなく、壊れて、精製されている金属
中に落下する傾向の少ない形態で凝縮物を採集すること
によって達成される。好ましくは、炉の天井は、水で冷
却されており、天井で採集された凝縮物が、凝縮物をド
ーム型表面に対して保持することになる「フープ強度」
を有するようなドーム構造を有する。別の実施の形態に
おいて、炉の天井から離れた別の水冷部材が設けられて
いる。さらに、この水冷部材には、凝縮物の保持を向上
させるばち形保持溝が形成された表面を設けてもよい。SUMMARY OF THE INVENTION These and other objects of the present invention are to provide a water cooled condensate holding surface on a hearth in a low temperature hearth refining furnace so that it is not brittle, broken and refined. This is achieved by collecting the condensate in a form that is less prone to falling into the metal that is present. Preferably, the furnace ceiling is water-cooled and the "hoop strength" is such that condensate collected at the ceiling will retain the condensate against the dome-shaped surface.
Having a dome structure having the following. In another embodiment, another water cooling member is provided remote from the furnace ceiling. Further, the water cooling member may be provided with a surface having a dovetail-shaped holding groove for improving the retention of condensate.
【０００７】[0007]
【発明の実施の形態】図１に示した本発明の典型的な実
施の形態において、低温炉床精錬炉10は、精錬すべき合
金を含有し、水のような冷却液の内部循環により通常の
方法で冷却される従来の低温炉床12を備えている。精錬
すべき合金に、エネルギーのビーム15をそれによって炉
床内の合金材料に選択的に向けることのできる電子ビー
ムガン14のような一つ以上のエネルギー源からエネルギ
ーが供給される。精錬後、溶融した合金は、炉床からト
ラフ16を通って、溶融金属がその内部で固化されて続い
ての再溶解用のインゴットまたは電極を形成する従来の
水冷直立金型18まで搬送される。DETAILED DESCRIPTION OF THE INVENTION In the exemplary embodiment of the invention shown in FIG. 1, a cryogenic hearth refining furnace 10 contains the alloy to be smelted and is usually provided by internal circulation of a coolant such as water. Is provided with a conventional low-temperature hearth 12 cooled by the above method. The alloy to be smelted is supplied with energy from one or more energy sources, such as an electron beam gun 14, which can selectively direct a beam of energy 15 onto the alloy material in the hearth. After refining, the molten alloy is conveyed from the hearth through a trough 16 to a conventional water-cooled upright mold 18 in which the molten metal is solidified to form an ingot or electrode for subsequent remelting. .
【０００８】精錬工程中、精錬される合金の様々な成分
21が蒸発して、蓋26を有する真空容器24の内面22に向か
って上方に拡散する。ここで、その成分は、表面22上で
固体コーティング25に凝縮される。本発明により表面22
上に固化された凝縮物である固体コーティング25を効果
的に保持するために、蓋26には、水のような冷却液がそ
れを通って循環する導管またはジャケットのような内部
通路28が設けられている。このように、蒸発した合金成
分がその上で凝縮し、固化する低温表面を設けることに
より、凝縮物の固体コーティング25は、冷却されていな
い表面上に付着した凝縮物のものとは異なる形態学を有
している。この形態学における差は、雪（従来の凝縮物
スクリーンおよび非冷却表面上の凝縮物に対応する）お
よび氷（水冷表面22上の凝縮物25に対応する）の間の差
といくぶん似ている。形態学のこの差の結果として、凝
縮物の固体コーティング25は、壊れにくく、割れて、炉
床内の液体金属中に落下する傾向が少ない。During the refining process, various components of the alloy to be refined
21 evaporates and diffuses upwardly toward the inner surface 22 of the vacuum vessel 24 having the lid 26. Here, the components condense on the surface 22 into a solid coating 25. According to the invention, the surface 22
To effectively retain the solid coating 25, the condensate solidified thereon, the lid 26 is provided with an internal passage 28, such as a conduit or jacket, through which a cooling liquid, such as water, circulates. Have been. Thus, by providing a cold surface on which the evaporated alloy components condense and solidify, the solid coating 25 of the condensate has a different morphology than that of the condensate deposited on the uncooled surface. have. The difference in this morphology is somewhat similar to the difference between snow (corresponding to condensate on a conventional condensate screen and an uncooled surface) and ice (corresponding to condensate 25 on a water-cooled surface 22). . As a result of this difference in morphology, the solid coating 25 of the condensate is less fragile and less prone to cracking and falling into the liquid metal in the hearth.
【０００９】図１に示した実施の形態において、炉の蓋
26はドーム形状を有し、炉床に面する凹内面を設けてい
る。これにより、凝縮物コーティングを自己支持性に
し、その表面上の凝縮物の部分が分かれて炉床中に落下
する傾向を減少させる「フープ」効果が達成される。[0009] In the embodiment shown in FIG.
26 has a dome shape and has a concave inner surface facing the hearth. This achieves a "hoop" effect that renders the condensate coating self-supporting and reduces the tendency for portions of the condensate on its surface to separate and fall into the hearth.
【００１０】さらに、通路28を通って循環された冷却液
により保持された表面22の温度が比較的一定であること
によって、表面には熱サイクルがなくなり、さらに、凝
縮物がその表面から離れる傾向が減少する。In addition, the relatively constant temperature of surface 22 held by the coolant circulated through passageway 28 eliminates thermal cycling on the surface, and furthermore, the tendency for condensate to leave the surface. Decrease.
【００１１】図２に断片的に示されている本発明の別の
実施の形態において、ドーム形カバー26のドーム形挿入
部材32には、内面34上への凝縮物37の層の保持を向上さ
せるように、ばち形溝36が形成された内面34が設けられ
ている。挿入部材には、図１の蓋26と同様な方法で、水
冷通路38が設けられている。挿入部材32は好ましくは、
蓋26および炉床12の間に位置し、エネルギー源14から炉
床へのエネルギービーム15が通過するための開口部40を
有している。精錬操作の期間および精錬される特定の合
金に応じて、ばち形溝を有するまたは有さないドーム形
挿入部材32を用いてもよい。In another embodiment of the present invention, shown fragmentarily in FIG. 2, the dome-shaped insert 32 of the dome-shaped cover 26 enhances the retention of a layer of condensate 37 on the inner surface 34. An inner surface 34 having a dovetail groove 36 is provided so as to make it possible. The insertion member is provided with a water cooling passage 38 in a manner similar to the lid 26 of FIG. The insertion member 32 is preferably
An opening 40 is located between the lid 26 and the hearth 12, through which the energy beam 15 from the energy source 14 to the hearth passes. Depending on the duration of the refining operation and the particular alloy to be refined, a dome-shaped insert 32 with or without a dovetail groove may be used.
【００１２】所望であれば、図１に示した実施の形態の
ドーム形カバー26および容器24の側壁に、同様にばち形
保持溝を設けてもよい。If desired, the domed cover 26 and the side walls of the container 24 of the embodiment shown in FIG.
【００１３】ここに、本発明を特定の実施の形態を参照
して記載してきたが、当業者には、多くの改変および変
更が容易に行われる。したがって、そのような変更およ
び改変の全てが本発明の意図する範囲に含まれる。Although the present invention has been described with reference to particular embodiments, many modifications and changes will readily occur to those skilled in the art. Therefore, all such changes and modifications are included in the intended scope of the present invention.
【図１】本発明による低温炉床精錬用の凝縮物保持装置
の一つの実施の形態を示す垂直断面図FIG. 1 is a vertical sectional view showing one embodiment of a condensate holding device for refining a low-temperature hearth according to the present invention.
【図２】本発明による別の凝縮物保持装置を示す断片図FIG. 2 is a fragmentary view showing another condensate holding device according to the present invention.
10 低温炉床精錬炉 12 低温炉床 14 電子ビームガン 15 ビーム 16 トラフ 18 水冷直立全型 22 表面 24 真空容器 25 固体コーティング 26 蓋 28，38 水冷通路 32 挿入部材 36 ばち形溝 40 開口部 10 Low-temperature hearth refining furnace 12 Low-temperature hearth 14 Electron beam gun 15 Beam 16 Trough 18 Water-cooled upright type 22 Surface 24 Vacuum container 25 Solid coating 26 Lid 28, 38 Water-cooled passage 32 Insertion member 36 Bee-shaped groove 40 Opening
───────────────────────────────────────────────────── フロントページの続き (72)発明者 ウィリアム エフ ブリントン アメリカ合衆国 ペンシルバニア州 17519 イースト アール メープル ストリート 696 (72)発明者 レオナード エフ マクマレン アメリカ合衆国 ペンシルバニア州 19543 モーガンタウン アールディー ナンバー２ ボックス 141 (56)参考文献 特開 平５−78760（ＪＰ，Ａ) 特開 昭63−176440（ＪＰ，Ａ) 実開 昭61−69266（ＪＰ，Ｕ) 特公 昭42−4122（ＪＰ，Ｂ１) 特公 昭39−3557（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) C22B 9/00 - 9/22 F27B 3/24 F27D 1/12 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor William F. Blinton United States of America 17519 East Earl Maple Street 696 (72) Inventor Leonard F. McMullen United States of America Pennsylvania 19543 Morgantown Ardy Number 2 Box 141 (56) References Special JP-A-5-78760 (JP, A) JP-A-63-176440 (JP, A) JP-A-61-69266 (JP, U) JP-B-42-4122 (JP, B1) JP-B-39-3557 ( JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) C22B 9/00-9/22 F27B 3/24 F27D 1/12
Claims (8)
て、 精錬炉床の上に配置された、冷却液通路を有し、前記炉
床からの蒸発した合金成分を受け入れる該炉床に面した
表面を有する部材を備えており、前記炉床に面した表面
に、複数のばち形保持溝が形成されていることを特徴と
する凝縮物保持装置。1. A condensate holding device for cryogenic hearth refining, comprising a coolant passage disposed above a smelting hearth, for receiving evaporated alloy components from the hearth. A condensate holding device, comprising: a member having a surface facing the hearth, wherein a plurality of dovetail-shaped holding grooves are formed on the surface facing the hearth.
に面した表面が該炉床に向かって凹面曲率を有すること
を特徴とする請求の範囲第１項記載の凝縮物保持装置。2. The condensate holding device according to claim 1, wherein the member has a dome shape, and a surface facing the hearth has a concave curvature toward the hearth.
蓋からなることを特徴とする請求の範囲第１項記載の凝
縮物保持装置。3. The condensate holding device according to claim 1, wherein said member comprises a lid of a vessel containing said hearth.
却液通路を有する部材が、該炉床と該容器の頂部との間
のハウジング内に配置されていることを特徴とする請求
の範囲第１項記載の凝縮物保持装置。4. The apparatus according to claim 1, further comprising a container containing the hearth, wherein the member having the coolant passage is disposed in a housing between the hearth and a top of the container. 2. The condensate holding device according to claim 1, wherein
方法であって、合金がエネルギービームの衝突により加
熱され、該合金の成分が蒸発される炉床の上に部材を配
置し、該部材を冷却液の循環により冷却して、前記炉床
に面した該部材の表面上に、蒸発した合金成分を凝縮さ
せ、固化させる各工程からなり、前記炉床に面した部材
の表面にばち形保持溝を提供して、前記凝縮物の保持を
促進させることを特徴とする方法。5. A method of retaining condensate in a low-temperature hearth refining, comprising: placing a member on a hearth where the alloy is heated by the impact of an energy beam to evaporate components of the alloy; Are cooled by circulating a cooling liquid to condense and solidify the evaporated alloy component on the surface of the member facing the hearth, and the solidification is performed on the surface of the member facing the hearth. Providing a shape retaining groove to facilitate retention of the condensate.
蓋として配置することを特徴とする請求の範囲第５項記
載の方法。6. The method according to claim 5, wherein the member is arranged as a lid of a vessel containing the hearth.
する容器の頂部との間に配置することを特徴とする請求
の範囲第５項記載の方法。7. The method of claim 5, wherein said member is located between said hearth and a top of a vessel containing said hearth.
する工程を含み、該凹面が該炉床に面していることを特
徴とする請求の範囲第５項記載の方法。8. The method of claim 5 including the step of placing a member having a concave surface on said hearth, said concave surface facing said hearth.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US92320197A | 1997-09-04 | 1997-09-04 | |
| US923201 | 1997-09-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11132664A JPH11132664A (en) | 1999-05-21 |
| JP3076306B2 true JP3076306B2 (en) | 2000-08-14 |
Family
ID=25448297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10248094A Expired - Fee Related JP3076306B2 (en) | 1997-09-04 | 1998-09-02 | Condensate retention equipment for low temperature hearth refining. |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0900854B1 (en) |
| JP (1) | JP3076306B2 (en) |
| DE (1) | DE69800856T2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4443430B2 (en) | 2005-01-25 | 2010-03-31 | 東邦チタニウム株式会社 | Electron beam melting device |
| EP1845325B1 (en) * | 2005-01-25 | 2010-08-11 | Toho Titanium Co., Ltd. | Apparatus for melting metal by electron beams and process for producing high-melting metal ingot using this apparatus |
| JP5066357B2 (en) * | 2006-10-25 | 2012-11-07 | 東邦チタニウム株式会社 | Melting apparatus for melting metal and method for melting metal using the same |
| JP5046385B2 (en) * | 2007-09-25 | 2012-10-10 | 東邦チタニウム株式会社 | Metal electron beam melting furnace and metal melting method using the same |
| AT509787B1 (en) * | 2010-04-21 | 2012-09-15 | Inteco Special Melting Technologies Gmbh | WATER COOLED LID FOR A TEMPERED TREATMENT VESSEL FOR METAL MELTS |
| CN113249587B (en) * | 2021-03-22 | 2022-10-18 | 洛阳双瑞精铸钛业有限公司 | Combined condensation cover for smelting titanium alloy in EB (Electron Beam) furnace |
| CN113249586B (en) * | 2021-03-22 | 2023-02-28 | 洛阳双瑞精铸钛业有限公司 | Double-layer condensation cover for smelting titanium alloy in EB (Electron Beam) furnace |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3690635A (en) * | 1969-05-16 | 1972-09-12 | Air Reduction | Condensate collection means |
| FR2254247A5 (en) * | 1973-12-05 | 1975-07-04 | Desmarquest & Cec | Spherical electrically heated laboratory furnace - for operation at high temps. under vacuum and under controlled atmospheres |
| DE3147337C2 (en) * | 1981-11-28 | 1985-03-14 | SIDEPAL S.A. Société Industrielle de Participations Luxembourgeoise, Luxemburg/Luxembourg | Water-cooled hood for metallurgical vessels, in particular pouring ladles |
| SE9504444D0 (en) * | 1995-12-12 | 1995-12-12 | Essge Systemteknik Ab | Panel |
-
1998
- 1998-07-23 EP EP19980202473 patent/EP0900854B1/en not_active Expired - Lifetime
- 1998-07-23 DE DE1998600856 patent/DE69800856T2/en not_active Expired - Lifetime
- 1998-09-02 JP JP10248094A patent/JP3076306B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE69800856D1 (en) | 2001-07-05 |
| DE69800856T2 (en) | 2002-09-12 |
| EP0900854B1 (en) | 2001-05-30 |
| JPH11132664A (en) | 1999-05-21 |
| EP0900854A1 (en) | 1999-03-10 |
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