JPS6150128B2 - - Google Patents
Info
- Publication number
- JPS6150128B2 JPS6150128B2 JP56046522A JP4652281A JPS6150128B2 JP S6150128 B2 JPS6150128 B2 JP S6150128B2 JP 56046522 A JP56046522 A JP 56046522A JP 4652281 A JP4652281 A JP 4652281A JP S6150128 B2 JPS6150128 B2 JP S6150128B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- graphite
- metal
- molten metal
- adjustment ring
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling the moulds
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】
本発明は、偏析凝固を利用した金属の純化法に
用いる鋳造用鋳型に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a casting mold used in a metal purification method using segregation solidification.
一般に、金属を非常に遅い速度で冷却すると最
初に凝固した部分は初期濃度と異なつたものとな
り、溶質元素、例えばアルミニウム中における
Fe，Si，Cuなどは、該部分で濃度が低くなる。
かかる現象を利用して金属を純化する方法は、例
えば特公昭38−16604号などとして知られてい
る。かかる方法における鋳型の材料としては潤滑
性などの点から黒鉛が用いられている。しかしな
がらかかる鋳型は生産性の見地から大型インゴツ
ト用鋳型が望まれるが、黒鉛の場合はきわめて高
価である。又加熱により鋳型上端部の酸化消耗が
著しく、結果的に黒鉛鋳型の寿命が短かくなり、
製品コストの上昇に大きく影響する。 In general, when a metal is cooled at a very slow rate, the first solidified portion has a different concentration than the initial concentration, and the concentration of solute elements, e.g.
The concentration of Fe, Si, Cu, etc. becomes low in this part.
A method of purifying metals by utilizing such a phenomenon is known, for example, as disclosed in Japanese Patent Publication No. 16604/1983. Graphite is used as the material for the mold in this method due to its lubricity. However, from the viewpoint of productivity, such a mold is desired to be used for large ingots, but graphite is extremely expensive. In addition, heating causes significant oxidation and wear at the upper end of the mold, resulting in a shortened lifespan of the graphite mold.
This has a significant impact on increasing product costs.
そこで本発明では、金属の純化に用いる鋳型
を、セラミツクと黒鉛の複合体で構成し、少くと
も鋳型内面における凝固界面以下の部分は黒鉛鋳
型とし、かつ底台の上部に間隙調節リングを嵌着
してなるものである。 Therefore, in the present invention, the mold used for metal purification is composed of a composite of ceramic and graphite, at least the part below the solidification interface on the inner surface of the mold is made of graphite mold, and a gap adjustment ring is fitted to the upper part of the base. This is what happens.
以下、図面に基づいて、本発明を詳細に説明す
ると、第１図は本発明の一実施例の鋳型をつかつ
て金属の純化を行なつている状態を示す説明図で
あるが、図中１はセラミツク鋳型で、その下部の
内面には黒鉛鋳型２が複合せしめられている。４
は底台であり、５は撹拌子、６はヒーター、７は
冷却管である。 Hereinafter, the present invention will be explained in detail based on the drawings. FIG. 1 is an explanatory diagram showing a state in which metal is purified using a mold according to an embodiment of the present invention. is a ceramic mold, and a graphite mold 2 is composited on the inner surface of its lower part. 4
is a bottom stand, 5 is a stirrer, 6 is a heater, and 7 is a cooling pipe.
かかる装置で金属の純化を行なうには、まず底
台４を複合鋳型１，２の下部開口に当て、鋳型内
部に溶湯３を入れてヒーター６により適温に保
ち、これを冷却管７より冷却媒体を吹付けること
により、底台４側から冷却し、底台上に精製金属
を析出せしめる。そして底台４を徐々に引下げて
行つて、その上に連続的に純化金属鋳塊８を得
る。この際凝固界面９付近は撹拌子５をもつて撹
拌し、凝固界面付近に濃縮される不純物を溶湯内
に分散せしめる。 To purify metal using such an apparatus, first place the base 4 against the lower openings of the composite molds 1 and 2, put the molten metal 3 inside the mold, keep it at an appropriate temperature with the heater 6, and pour the cooling medium through the cooling pipe 7. By spraying the metal, the metal is cooled from the bottom 4 side and the refined metal is deposited on the bottom 4. Then, the bottom stand 4 is gradually lowered, and the purified metal ingot 8 is continuously obtained thereon. At this time, the vicinity of the solidification interface 9 is stirred using a stirrer 5 to disperse impurities concentrated in the vicinity of the solidification interface into the molten metal.
本発明において、上記のような複合鋳型を用い
た理由は、実質的に潤滑性が要求される凝固界面
近傍での鋳型部では黒鉛鋳型を使用しこれを再生
しながら使用して、その要求を満足せしめ、その
他の部分は、金属溶湯を汚染しない耐熱材料たと
えばアルミナなどのセラミツクをもつて構成し、
半永久的に使用し、消耗部材の使用量を極力少な
くしようというものである。 In the present invention, the reason for using the above-mentioned composite mold is that a graphite mold is used in the mold part near the solidification interface where lubricity is essentially required, and this is used while being regenerated to meet that requirement. The other parts are made of a heat-resistant material such as ceramic such as alumina that does not contaminate the molten metal.
The idea is to use it semi-permanently and to minimize the amount of consumable parts used.
黒鉛鋳型は第１図の形態の外に第２図のように
鋳型の下半部を全部黒鉛製とすることや、第３図
のように鋳型内面の下半分にペーパー状の黒鉛を
貼り付けたものでもよい。 In addition to the form shown in Figure 1, graphite molds can also have the lower half of the mold made entirely of graphite, as shown in Figure 2, or paper-like graphite pasted on the lower half of the inner surface of the mold, as shown in Figure 3. It may also be something you have.
いずれにしろ、黒鉛鋳型２の部分は潤滑性はよ
いものの酸化消耗による表面のガサツキやインゴ
ツトとのヒキツリに起因するスリ傷等により寿命
があり、スムースなインゴツトの降下が不可能に
なる。この黒鉛鋳型の寿命は、黒鉛品位、加熱雰
囲気、鋳造条件によつて左右されるが、黒鉛内面
を１mm切削すれば新生面が現われ再使用できる。 In any case, although the graphite mold 2 has good lubricity, it has a limited lifespan due to surface roughness due to oxidative wear and scratches caused by scratches with the ingot, making it impossible to lower the ingot smoothly. The life of this graphite mold depends on the graphite grade, heating atmosphere, and casting conditions, but if the inner surface of the graphite is cut by 1 mm, a new surface will appear and it can be reused.
この切削によつて生じた間隙により鋳込み初期
に湯洩れの危険性があるが、例えば石綿等をつめ
れば湯洩れもなく使用できる。したがつて黒鉛鋳
型部は再生可能な間は寿命が延びる。しかし、や
がて黒鉛鋳型と底台周面との間の間隙が拡大し
て、溶湯の表面張力の範囲の限界を越えるように
なると鋳込みスタート時に湯洩れが生ずるように
なる。 There is a risk of molten metal leaking in the early stages of casting due to the gap created by this cutting, but if it is filled with, for example, asbestos, it can be used without any molten metal leaking. The life of the graphite mold part is therefore extended while it is recyclable. However, as the gap between the graphite mold and the peripheral surface of the base expands and exceeds the limit of the surface tension range of the molten metal, leakage occurs at the start of pouring.
そこで本発明は、底台の上部に間隔調整リング
を嵌着したものである。第１図における符号１０
がこの間隔調節リングで第４図にその一部を拡大
して示すが、底台４の上部の周囲の黒鉛鋳型２と
当る部分に間隔調節リング１０を嵌着してなるも
のである。 Therefore, in the present invention, a spacing adjustment ring is fitted to the upper part of the base. Reference numeral 10 in Figure 1
This spacing adjustment ring, a part of which is shown enlarged in FIG. 4, is made by fitting a spacing adjustment ring 10 around the upper part of the bottom pedestal 4 to the part that contacts the graphite mold 2.
黒鉛鋳型２が消耗し、前述のように切削して新
生面を出して用いている中に限度に達すると、第
５図に示すように、前よりも大径の間隔調節リン
グ１０′を、間隔調節リング１０に代えて底台４
の上部に嵌着する。すると、黒鉛鋳型２と底台４
との間〓はなくなり、再び湯もれを生ずることな
く純化作業を行なうことができるようになる。 When the graphite mold 2 wears out and reaches its limit while being used by cutting to expose a new surface as described above, as shown in FIG. Bottom stand 4 instead of adjustment ring 10
It fits on the top of the. Then, the graphite mold 2 and the base 4
This eliminates the gap between 〓 and 〓, and purification work can be carried out without causing hot water leakage again.
なお、本発明によれば、黒鉛鋳型内面が太径に
なつていくが、純化金属は再溶解して用いられる
ものであるから、径の多少の変化は障害にならな
い。 According to the present invention, the inner surface of the graphite mold becomes larger in diameter, but since the purified metal is used after being remelted, a slight change in diameter will not be a problem.
本発明は以上のように、黒鉛とセラミツクとを
複合してなる鋳型により、加熱雰囲気下で使用す
る鋳型の寿命を大巾に伸ばすことが可能で、純化
金属の製造コストの低減が可能となる。 As described above, the present invention makes it possible to significantly extend the life of the mold used in a heated atmosphere by using a mold made of a composite of graphite and ceramic, and to reduce the manufacturing cost of purified metal. .
第１図は本発明の一実施例の鋳型の説明図、第
２図および第３図はその変形例、第４図および第
５図は要旨の説明図である。
１…セラミツク鋳型、２…黒鉛鋳型、３…溶
湯、４…底台、５…撹拌子、６…ヒーター、７…
冷却管、８…純化金属鋳塊、９…凝固界面、１
０，１０′…間隔調節リング。
FIG. 1 is an explanatory diagram of a mold according to an embodiment of the present invention, FIGS. 2 and 3 are variations thereof, and FIGS. 4 and 5 are explanatory diagrams of the gist. 1... Ceramic mold, 2... Graphite mold, 3... Molten metal, 4... Bottom stand, 5... Stirrer, 6... Heater, 7...
Cooling pipe, 8... Purified metal ingot, 9... Solidification interface, 1
0,10'... Spacing adjustment ring.
Claims (1)
拌しながら底部より冷却して、精製金属を凝固成
長せしめるための鋳型において、セラミツク鋳型
と黒鉛鋳型とを複合せしめ、少なくとも鋳型内面
における凝固界面以下の部分は黒鉛鋳型とし、か
つ底台上部に間隙調節リングを嵌着してなること
を特徴とする金属の純化に用いる鋳造用鋳型。1. In a mold for solidifying and growing refined metal by placing molten metal to be refined inside and cooling it from the bottom while stirring, a ceramic mold and a graphite mold are combined, and at least below the solidification interface on the inner surface of the mold A casting mold used for purifying metals, characterized in that the part is a graphite mold, and a gap adjustment ring is fitted to the upper part of the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56046522A JPS57160555A (en) | 1981-03-31 | 1981-03-31 | Mold for casting used for purification of metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56046522A JPS57160555A (en) | 1981-03-31 | 1981-03-31 | Mold for casting used for purification of metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57160555A JPS57160555A (en) | 1982-10-02 |
| JPS6150128B2 true JPS6150128B2 (en) | 1986-11-01 |
Family
ID=12749600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56046522A Granted JPS57160555A (en) | 1981-03-31 | 1981-03-31 | Mold for casting used for purification of metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57160555A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IN171826B (en) * | 1988-03-23 | 1993-01-23 | Ngk Insulators Ltd | |
| JP2666876B2 (en) * | 1993-06-18 | 1997-10-22 | 工業技術院長 | Gold refining method |
| US6223805B1 (en) * | 1994-04-22 | 2001-05-01 | Lanxide Technology Company, Lp | Method for manufacturing castable metal matrix composite bodies and bodies produced thereby |
| CN110042460A (en) * | 2019-05-29 | 2019-07-23 | 孟静 | The device of high pressure oriented growth high strength alumin ium alloy |
-
1981
- 1981-03-31 JP JP56046522A patent/JPS57160555A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57160555A (en) | 1982-10-02 |
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