JP2645668B2 - Filtration method of molten metal - Google Patents
Filtration method of molten metalInfo
- Publication number
- JP2645668B2 JP2645668B2 JP1302255A JP30225589A JP2645668B2 JP 2645668 B2 JP2645668 B2 JP 2645668B2 JP 1302255 A JP1302255 A JP 1302255A JP 30225589 A JP30225589 A JP 30225589A JP 2645668 B2 JP2645668 B2 JP 2645668B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- filter
- filtration
- metal
- porous tube
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は金属溶湯中に含まれる介在物の濾過方法に関
するものである。Description: TECHNICAL FIELD The present invention relates to a method for filtering inclusions contained in a molten metal.
（従来の技術） 例えば、磁気デイスク、スパッターターゲット材、ボ
ンデイングワイアー、箔地をアルミニウムで作る場合、
高品質化の要求に伴い、介在物の大きさは数μｍ以下で
あることが要求される。(Conventional technology) For example, when making a magnetic disk, a sputter target material, a bonding wire, and a foil material with aluminum,
With the demand for higher quality, the size of inclusions is required to be several μm or less.
この介在物除去のためには、一般的に金属溶湯を例え
ば、セラミックフオームフイルターまたは各段３〜６本
の２〜４段からなるポーラスチューブフイルター等に通
して自重方式により濾過することが行われている。ま
た本出願人が先に提案した特開昭60−5829号「金属溶湯
の濾過方法」に記載するように、フイルターに形成せ
る気孔を通して金属溶湯が最初にフイルターを通過する
濾過開始初期の一時的にフイルターの金属溶湯出口側に
真空圧を作用させるものがある。In order to remove the inclusions, generally, the molten metal is filtered by a self-weight method, for example, through a ceramic form filter or a porous tube filter having 2 to 4 stages of 3 to 6 stages. ing. In addition, as described in Japanese Patent Application Laid-Open No. 60-5829, "Method of Filtration of Molten Metal", which was previously proposed by the present applicant, the metal molten metal first passes through the pores formed in the filter, and temporarily passes through the filter at the beginning of filtration. There is a type in which vacuum pressure is applied to the outlet side of a molten metal of a filter.
（発明が解決しようとする課題） しかしながら前記の方法は濾過槽の金属溶湯入口側
と出口側の湯面のレベル差に基ずくメタルヘッド差を利
用して濾過する機構であるので、気孔径が120〜170μｍ
のポーラスチューブフイルターを使用した場合は下より
１〜２段のみ通過し溶湯がフイルター全段全数を通過し
なくメタルヘッド差が急激に大きくなり鋳造不能とな
る。このため、濾過槽の深さをそれ相当に深いものとし
なければならず、設備上および安全性等の面で障害とな
る。またフイルターの気孔径は230μｍ以上必要とな
り、濾過開始時の抵抗が高くなることからこれより細か
い気孔径とすることができず、そのため数μｍ以下の介
在物を除去することは不可能であった。また上記対策と
して溶湯温度を750℃以上の高温にし、濾過を開始する
ことも試みられているが高品質の要求される磁気デイス
ク材はマグネシウム酸化物が生成し易くなるため好まし
くない。(Problems to be Solved by the Invention) However, the above-described method is a mechanism for performing filtration using a metal head difference based on a level difference between a molten metal inlet side and a molten metal level of a filtration tank. 120-170μm
When the porous tube filter is used, only one or two stages pass from below, the molten metal does not pass through all the stages of the filter, and the difference in metal head sharply increases, making casting impossible. For this reason, the depth of the filtration tank must be considerably large, which is an obstacle in terms of equipment and safety. In addition, the pore diameter of the filter is required to be 230 μm or more, and the resistance at the start of filtration is increased, so that it is not possible to make the pore diameter smaller than this, and it was impossible to remove inclusions of several μm or less. . As a countermeasure, it has been attempted to raise the temperature of the molten metal to 750 ° C. or higher and start filtration. However, a magnetic disk material requiring high quality is not preferable because magnesium oxide is easily generated.
また前記の方法でポーラスチューブフイルターを使
用した場合は、金属溶湯出口側に真空圧を作用させるの
で、自重方式の濾過槽でメタルヘッド差が初期に急激に
大きくなることはないが、長期間の使用ではフイルター
気孔中に酸化皮膜を引きこむことになりやがて、溶湯の
流れはメタルヘッド差の小さい上段フイルターにおいて
は引きこまれた酸化皮膜のため金属溶湯が通過しなくな
り、メタルヘッド差の大きい下段フイルターに集中し易
くバランスのとれないものであった。そこで溶湯をフイ
ルターの全段全数にバランスよく通過させ、フイルター
の目詰りを少なくし、フイルターの寿命をさらに延長さ
せ、濾過操業ロッド数を伸ばすことが望まれていた。In addition, when a porous tube filter is used in the above-described method, the vacuum pressure is applied to the outlet of the molten metal, so that the metal head difference does not suddenly increase in the initial stage in the self-weight filtration tank. In use, the oxide film is drawn into the pores of the filter, and eventually the flow of molten metal in the upper filter, which has a small difference in metal head, does not allow the molten metal to pass through because of the drawn oxide film, and the lower layer, in which the difference in metal head is large, It was easy to concentrate on the filter and it was unbalanced. Therefore, it has been desired to allow the molten metal to pass through all the stages of the filter in a well-balanced manner, reduce clogging of the filter, further extend the life of the filter, and increase the number of filtration operation rods.
本発明の目的は上述の不具合を解消して、例えばポー
ラスチューブフイルターを使用した場合、メタルヘッド
差の急激な増大を抑制し、平均気孔径が120〜170μｍの
微細なフイルターの使用を可能にし、溶湯がフイルター
の全段全数を通過し得るものとし、さらに該フイルター
の目詰りを少なくし、フイルターの寿命を延長させる金
属溶湯の濾過方法を提供することにある。The object of the present invention is to solve the above-mentioned disadvantages, for example, when using a porous tube filter, to suppress a sharp increase in metal head difference, to enable the use of a fine filter having an average pore diameter of 120 to 170 μm, It is an object of the present invention to provide a method for filtering a molten metal that allows the molten metal to pass through all stages of the filter, further reduces clogging of the filter, and extends the life of the filter.
（課題を解決するための手段） かくして本発明によれば、金属溶湯を濾過する方法に
おいて、金属溶湯が最初にフイルターを通過する濾過開
始初期の一時期またはフイルターに目詰りが生じた時
に、フイルターの溶出出口側より加圧、常圧または加
圧、負圧を交互に繰返し作用させる金属溶湯の濾過方法
が提供される。(Means for Solving the Problems) Thus, according to the present invention, in a method for filtering a molten metal, when the metal is first clogged at the beginning of filtration when the molten metal first passes through the filter or when the filter is clogged. There is provided a method for filtering a molten metal in which pressurization, normal pressure or pressurization and negative pressure are alternately and repeatedly applied from an elution outlet side.
以下に本発明の濾過方法を実施装置に基づいて説明す
る。第１図は本発明の濾過方法を実施せる金属溶湯濾過
装置の概略断面説明図である。第１図において濾過槽１
内の金属溶湯溜２の底部には鏡板3,3間に、気孔径120〜
170μｍの複数本のポーラスチューブフイルター４が固
着されている。このようなポーラスチューブフイルター
４および断熱耐火材を積層してなる（図示せず）濾過槽
の耐溶湯材よりなる内壁は、濾過槽１および該濾過槽上
部の上蓋12に設置された適当な熱源（図示せず）により
予熱され、その後の濾過作業時の所要温度に維持され
る。Hereinafter, the filtration method of the present invention will be described based on an apparatus. FIG. 1 is a schematic sectional explanatory view of a molten metal filtration apparatus for carrying out the filtration method of the present invention. In FIG. 1, filtration tank 1
At the bottom of the molten metal reservoir 2 in the inside, between the end plates 3
A plurality of 170 μm porous tube filters 4 are fixed. The inner wall of the filter tank formed by laminating such a porous tube filter 4 and a heat-insulating refractory material (not shown) made of a refractory metal material has a suitable heat source installed on the filter tank 1 and the upper lid 12 on the upper part of the filter tank. (Not shown) and is maintained at the required temperature for the subsequent filtration operation.
また溶湯溜２に通じる入口樋５およびポーラスチュー
ブフイルター４の連通孔６および溶湯出口側通路７を流
れて来た濾過溶湯を濾過槽１から流出させるため出口樋
８が設けられている。なお、出口樋８に通じる、溶湯出
口側通路７の上部には本発明の特徴とする断面Ｖ字形に
傾斜した開口部を有する開口面積調節部材９が設置さ
れ、該開口22は後述する加圧、減圧を行なうノズル10の
先端部近傍に設けられた、断面Ｖ字形に傾斜した開口蓋
材11が、着脱可能とされている。これら開口面積調節部
材９および開口蓋材11はマリライト等の耐溶湯材にて形
成される。An outlet gutter 8 is provided to allow the filtered molten metal flowing through the inlet gutter 5 leading to the molten metal reservoir 2, the communication hole 6 of the porous tube filter 4 and the molten metal outlet side passage 7 to flow out of the filtration tank 1. An opening area adjusting member 9 having an opening inclined in a V-shaped cross section, which is a feature of the present invention, is provided above the molten metal outlet side passage 7 communicating with the outlet gutter 8. An opening lid member 11 having a V-shaped cross section, which is provided in the vicinity of the tip of the nozzle 10 for decompression, is detachable. The opening area adjusting member 9 and the opening lid member 11 are formed of a molten metal material such as marilite.
上記の加圧、減圧ノズル10は上蓋12を通して例えば鉄
パイプ等で形成され、第２図に示す如く頂部にて耐圧ホ
ース13により電磁弁14,フイルター、レギュレーター、
ユニット15を介してアルゴンガス等の不活性ガス16を流
し、溶湯出口側通路７を加圧したり、電磁弁14,17を介
してエアー19を流しエジェクター20にて溶湯出口側通路
７を負圧にしたりするためのものである。このような構
成の濾過装置によって濾過を行う場合は、最初にノズル
10を下げることにより開口面積調節部材９を開口22を開
口蓋材11で封じ、不活性ガスで溶湯出口側通路７を加圧
しておく。然る後に濾過すべき溶湯を入口樋５から溶湯
溜２へ供給しポーラスチューブフイルター４の上段まで
溶湯で覆い、上蓋に設けられたのぞき窓21から不活性ガ
スがフイルターから気泡として出てくることを確認す
る。なおポーラスチューブフイルター４の上段が溶湯に
覆れた後約20秒後から加圧と負圧を約10秒間隔で繰り返
し上記気泡発生がなくなった時点で加圧、負圧の繰返し
操作を停止し、開口蓋材11の取付けられたノズル10を濾
過装置内で持ち上げ開口22の封鎖をとき濾過を開始せし
めるものである。一旦濾過が開始されると図示例ではメ
タルヘッド差Δｌによって連続して濾過が行われる。The above-mentioned pressurizing / depressurizing nozzle 10 is formed of, for example, an iron pipe or the like through an upper lid 12, and as shown in FIG.
An inert gas 16 such as argon gas flows through the unit 15 to pressurize the molten metal outlet passage 7, and air 19 flows through the solenoid valves 14 and 17, and a negative pressure is applied to the molten metal outlet passage 7 by the ejector 20. It is to make it. When performing filtration with a filtration device having such a configuration, first perform nozzle
By lowering 10, the opening area adjusting member 9 is closed with the opening 22 by the opening lid member 11, and the molten metal outlet side passage 7 is pressurized with an inert gas. After that, the molten metal to be filtered is supplied from the inlet gutter 5 to the molten metal reservoir 2, covered with the molten metal up to the upper stage of the porous tube filter 4, and the inert gas comes out of the filter as bubbles from the view window 21 provided in the upper lid. Check. Approximately 20 seconds after the upper stage of the porous tube filter 4 is covered with the molten metal, pressurization and negative pressure are repeated at intervals of approximately 10 seconds. Then, the nozzle 10 to which the opening lid member 11 is attached is lifted in the filtering device to start the filtration when the opening 22 is closed. Once the filtration is started, in the illustrated example, the filtration is continuously performed by the metal head difference Δl.
また濾過操作の途中でポーラスチューブフイルターの
目詰りによりメタルヘッド差Δｌが大きくなった場合は
ドレン口23より濾過槽１内に残留した溶湯を排除した後
上記の操作と同様にノズル10を下げることにより、開口
面積調節部材９の開口22を開口蓋材11で封じ、溶湯出口
側通路７に加圧と負圧を繰返し作用させ該フイルターの
目詰まりを解消する。If the metal head difference Δl increases due to clogging of the porous tube filter during the filtration operation, the molten metal remaining in the filtration tank 1 is removed from the drain port 23, and then the nozzle 10 is lowered in the same manner as the above operation. As a result, the opening 22 of the opening area adjusting member 9 is sealed with the opening cover member 11, and the pressurizing and the negative pressure are repeatedly applied to the molten metal outlet side passage 7 to eliminate clogging of the filter.
（作 用） 溶湯の濾過装置への受入時および既に保持炉のタップ
口等で発生した酸化皮膜は濾過装置内へ流入し、ポーラ
スチューブフイルター４に付着する。この酸化皮膜の付
着した箇所は容易に溶湯が通過できない。本考案は金属
溶湯出口側通路７を加圧することで、ポーラスチューブ
フイルター４に付着した酸化皮膜を脱離または破く役目
を果たし、負圧にすることで、溶湯がポーラスチューブ
フイルター４を通過し易い様にし、この加圧、負圧を繰
返すことにより、溶湯がポーラスチューブフイルター４
の全段全数を通過し得るようにしたものである。なおこ
の場合負圧を作用させず、加圧と常圧を繰返すことで
も、負圧を作用させたとほぼ同様の効果が得られる。(Operation) The oxide film generated at the time of receiving the molten metal into the filtering device and at the tap port of the holding furnace flows into the filtering device and adheres to the porous tube filter 4. The portion where the oxide film adheres cannot easily pass through the molten metal. In the present invention, by pressurizing the molten metal outlet side passage 7, the oxide film adhered to the porous tube filter 4 is released or broken, and by making the pressure negative, the molten metal easily passes through the porous tube filter 4. By repeating the pressurization and the negative pressure, the molten metal becomes porous tube filter 4.
Can be passed through all the stages. Note that in this case, substantially the same effect as when the negative pressure is applied can be obtained by repeating the pressurization and the normal pressure without applying the negative pressure.
（実施例） 以下に実施例および従来例により、本発明の優れた効
果を具体的に説明する。(Examples) Hereinafter, the excellent effects of the present invention will be specifically described with reference to Examples and Conventional Examples.
実施例1. １ロット10tのAl−４％Mg合金を720±５℃で溶製し、
平均気孔径150μｍのポーラスチューブフイルターを使
用した第１図に示す金属溶湯濾過装置を用いて濾過し
た。濾過にあたっては濾過開始初期の一時期に、第２図
に示した加圧、負圧付与装置により、アルゴンガスによ
る1kg/cm2の加圧と10-2Torrの負圧を繰返し作用させ
た。上記本発明の金属溶湯の濾過方法による場合は第３
図に示すように７ロットの濾過をしてもメタルヘッド差
Δｌは60mm程度であり操業はなお可能であった。Example 1. A lot of 10 tonnes of Al-4% Mg alloy was melted at 720 ± 5 ° C.
Filtration was carried out using a molten metal filtration device shown in FIG. 1 using a porous tube filter having an average pore diameter of 150 μm. At the beginning of the filtration, a pressure of 1 kg / cm 2 with an argon gas and a negative pressure of 10 -2 Torr were repeatedly applied by the pressurizing and negative pressure applying device shown in FIG. In the case of the method for filtering molten metal of the present invention described above,
As shown in the figure, even after filtration of seven lots, the metal head difference Δl was about 60 mm, and the operation was still possible.
従来例1. 実施例と同条件の濾過操作を第２図に示した加圧、負
圧付与装置を用いず、自重方式で行なった場合は第３図
に示すように２ロットの濾過でメタルヘッド差Δｌは18
0mmとなり操業を継続できなかった。Conventional Example 1. When the filtration operation under the same conditions as in the embodiment was performed by the self-weight method without using the pressurizing and negative pressure applying device shown in FIG. 2, the metal was filtered by two lots as shown in FIG. Head difference Δl is 18
It was 0 mm, and the operation could not be continued.
従来例2. 実施例1.と同条件の濾過操作を、第２図に示した加
圧、負圧装置を用いて、濾過開始初期の一時期に10-2To
rrの負圧のみ作用させて行った場合は７ロットの濾過で
メタルヘッド差Δｌは180mmとなり、それ以上の操業を
継続できなかった。The filtration operation of the conventional example 2. Example 1. under the same conditions, the pressure shown in FIG. 2, the negative-pressure device, 10 -2 the To the one time of the start of filtration Initial
When only the negative pressure of rr was applied, the metal head difference Δl was 180 mm in the filtration of 7 lots, and further operation could not be continued.
（効 果） 本発明によれば、従来装置に僅かな改修を加えるだけ
で平均気孔径が120〜170μｍの微細なフイルターの使用
を可能にし、フイルターの目詰りを少なくし得るのでア
ルミニウム中の微細な介在物を高い除去効率で除去する
ことができるとともに、フイルターの寿命を延長するこ
とができ、本発明は高品位アルミニウム材に対する要請
に応える優れた工業的発明である。(Effects) According to the present invention, it is possible to use a fine filter having an average pore diameter of 120 to 170 μm and to reduce the clogging of the filter by making only a slight modification to the conventional device, so that the fine filter in aluminum can be used. The present invention is an excellent industrial invention that can remove high inclusions with high removal efficiency and can prolong the life of the filter, and meets the demand for high-grade aluminum materials.
第１図は本発明の濾過方法を実施するために使用する濾
過装置の一実施例を示す概略断面図、第２図は溶湯出口
側通路に加圧、負圧を繰返し付与する装置の系統図、第
３図はアルミニウム溶湯の濾過における操業ロット数と
メタルヘッド差の関係を示す図面である。 １……濾過槽、２……溶湯溜、３……鏡板、４……ポー
ラスチューブフイルター、５……入口樋、６……連通
孔、７……溶湯出口側通路、８……出口樋、９……開口
面積調節部材、10……ノズル、11……開口蓋材、12……
上蓋、13……耐圧ホース、14……電磁弁、15……フイル
ター，レギュレーターユニット、16……不活性ガス、17
……電磁弁、18……フイルター，レギュレーターユニッ
ト、19……エアー、20……エジエクター、21……のぞき
窓、22……開口、23……ドレン口。FIG. 1 is a schematic cross-sectional view showing one embodiment of a filtration device used for carrying out the filtration method of the present invention, and FIG. 2 is a system diagram of a device for repeatedly applying pressurization and negative pressure to a molten metal outlet side passage. FIG. 3 is a drawing showing the relationship between the number of operating lots and the difference in metal head in the filtration of molten aluminum. DESCRIPTION OF SYMBOLS 1 ... Filtration tank, 2 ... Molten reservoir, 3 ... End plate, 4 ... Porous tube filter, 5 ... Inlet gutter, 6 ... Communication hole, 7 ... Molten outlet side passage, 8 ... Outlet gutter, 9 ... opening area adjustment member, 10 ... nozzle, 11 ... opening lid material, 12 ...
Top lid, 13… Pressure-resistant hose, 14… Solenoid valve, 15 …… Filter, regulator unit, 16 …… Inert gas, 17
... solenoid valve, 18 ... filter, regulator unit, 19 ... air, 20 ... ejector, 21 ... view window, 22 ... opening, 23 ... drain port.
Claims (1)
を通して濾過する濾過方法において、金属溶湯が最初に
フイルターを通過する濾過開始初期の一時期またはフイ
ルターに目詰りが生じた時に、フイルターの金属溶湯出
口側より加圧、常圧または加圧、負圧を交互に繰返し作
用させ濾過することを特徴とする金属溶湯の濾過方法。1. A method for filtering inclusions contained in a molten metal through a filter, wherein the molten metal is first passed through the filter at an initial stage of filtration or when the filter is clogged. A method for filtering molten metal, characterized in that filtration is performed by alternately and repeatedly applying pressurization, normal pressure or pressurization and negative pressure from an outlet side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1302255A JP2645668B2 (en) | 1989-11-22 | 1989-11-22 | Filtration method of molten metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1302255A JP2645668B2 (en) | 1989-11-22 | 1989-11-22 | Filtration method of molten metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03162530A JPH03162530A (en) | 1991-07-12 |
| JP2645668B2 true JP2645668B2 (en) | 1997-08-25 |
Family
ID=17906815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1302255A Expired - Fee Related JP2645668B2 (en) | 1989-11-22 | 1989-11-22 | Filtration method of molten metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2645668B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5368663B2 (en) * | 2000-04-14 | 2013-12-18 | トーソー エスエムディー，インク． | Sputter target for reducing particulate emission during spattering and method for manufacturing the same |
| JP4410714B2 (en) | 2004-08-13 | 2010-02-03 | 富士フイルム株式会社 | Method for producing support for lithographic printing plate |
| DE602006001142D1 (en) | 2005-04-13 | 2008-06-26 | Fujifilm Corp | Method for producing a planographic printing plate support |
| JP5099399B2 (en) * | 2005-11-04 | 2012-12-19 | 独立行政法人日本原子力研究開発機構 | Molten metal refining apparatus and molten metal refining method |
| JP2009208140A (en) | 2008-03-06 | 2009-09-17 | Fujifilm Corp | Manufacturing method of aluminum alloy sheet for planographic printing plate, aluminum alloy sheet for planographic printing plate and support for planographic printing plate manufactured by the method |
| WO2010038812A1 (en) | 2008-09-30 | 2010-04-08 | 富士フイルム株式会社 | Electrolytic treatment method and electrolytic treatment device |
| JP2011205051A (en) | 2009-06-26 | 2011-10-13 | Fujifilm Corp | Light-reflecting substrate and process for manufacture thereof |
| CN105082725B (en) | 2009-09-24 | 2018-05-04 | 富士胶片株式会社 | Original edition of lithographic printing plate |
| WO2011078010A1 (en) | 2009-12-25 | 2011-06-30 | 富士フイルム株式会社 | Insulated substrate, process for production of insulated substrate, process for formation of wiring line, wiring substrate, and light-emitting element |
| EP2434592A3 (en) | 2010-09-24 | 2014-09-24 | Fujifilm Corporation | Anisotropically conductive member |
-
1989
- 1989-11-22 JP JP1302255A patent/JP2645668B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03162530A (en) | 1991-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2645668B2 (en) | Filtration method of molten metal | |
| US4982777A (en) | Countergravity casting method and apparatus | |
| CN107208179B (en) | Apparatus and method for removing unwanted inclusions from a metal melt | |
| CA1322096C (en) | Casting method for a continuous casting machine of a reduced height and consequential immersed teeming nozzle | |
| US5146973A (en) | Countergravity casting method and apparatus | |
| JPS605829A (en) | Filtering method of molten metal | |
| US5058865A (en) | Liquid metal processing | |
| AU2018278685B2 (en) | Apparatus and method for applying ceramic foam filters for the removal of unwanted inclusions from metal melts | |
| US4572486A (en) | Molten metal filtering vessel with internal filter | |
| CN216537021U (en) | Porous medium tower for exhausting of metal melt filter plate | |
| DK143486B (en) | PROCEDURE FOR STRENGTH CASTING OF CIRCULAR ALUMINUM CARDS | |
| JPH0718464Y2 (en) | Differential pressure casting equipment | |
| NZ758826B2 (en) | Apparatus and method for applying ceramic foam filters for the removal of unwanted inclusions from metal melts | |
| JP6593041B2 (en) | Casting apparatus and oxide removal method | |
| JPH0617558B2 (en) | Method for removing inclusions of molten metal | |
| JPS61180670A (en) | Casting device | |
| JPH0660373B2 (en) | Method for removing inclusions in molten metal plating bath | |
| JPH0890177A (en) | Immersion nozzle for continuous casting | |
| JPH0659543B2 (en) | Casting method and casting apparatus | |
| RU2060858C1 (en) | Method of flow-type metal vacuumizing upon continuous casting | |
| JPH07316611A (en) | Production of metallic granulated material | |
| JPS6120659A (en) | Discharge device for molten metal | |
| JP2003071211A (en) | Method for filtering cake and filtration apparatus | |
| CA2022331A1 (en) | Liquid metal processing | |
| JPH03165953A (en) | Method and apparatus for continuously casting metal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080509 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090509 Year of fee payment: 12 |
|
| LAPS | Cancellation because of no payment of annual fees |