JPH05195104A - Reduction method of molten copper or copper alloy - Google Patents
Reduction method of molten copper or copper alloyInfo
- Publication number
- JPH05195104A JPH05195104A JP3270992A JP3270992A JPH05195104A JP H05195104 A JPH05195104 A JP H05195104A JP 3270992 A JP3270992 A JP 3270992A JP 3270992 A JP3270992 A JP 3270992A JP H05195104 A JPH05195104 A JP H05195104A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- copper
- reducing agent
- gas
- molten
- 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.)
- Withdrawn
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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は銅または銅合金溶湯の還
元法に関し、さらに詳しくは、銅および銅合金溶湯の還
元に際して、発生するＯ2ガスを溶湯から可及的速やか
に除去し、溶湯中の酸素量を効果的に低減することが可
能な銅または銅合金溶湯の還元法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reducing molten copper or copper alloy, and more specifically, it removes O 2 gas generated during the reduction of molten copper and copper alloy from the molten metal as quickly as possible. The present invention relates to a method for reducing a copper or copper alloy melt capable of effectively reducing the amount of oxygen contained therein.
【０００２】[0002]
【従来技術】銅または銅合金は、優れた電気伝導性と熱
伝導性および優れた加工性を有しており、最近、とみに
熱交換器、電子・電気部品等の分野において需要が極め
て旺盛である。2. Description of the Related Art Copper or copper alloys have excellent electrical conductivity, thermal conductivity, and excellent workability, and recently there has been an extremely strong demand in the fields of heat exchangers, electronic / electrical parts, etc. is there.
【０００３】しかし、このような優れた性質を有してい
る銅または銅合金は、含有されている酸素（以下、Ｏ2
ガスとして説明する。）の量により、銅および銅合金の
特性が著しく損なわれるため、銅および銅合金の製造工
程においてＯ2ガス量の調整が重要な作業となってい
る。このＯ2ガス含有量を低減すること、即ち、還元を
行うことは、その調整工程は溶湯状態においてのみ行わ
れる。However, the copper or copper alloy having such excellent properties cannot be contained in oxygen (hereinafter referred to as O 2
It will be described as gas. The amount of) significantly impairs the properties of copper and copper alloys, so that adjusting the amount of O 2 gas is an important task in the manufacturing process of copper and copper alloys. Reducing the O 2 gas content, that is, performing the reduction is performed only in the molten state.
【０００４】一般的に、溶湯中に含有されているＯ2ガ
スを脱酸により低減する場合、普通、木炭等の還元剤を
溶湯表面に散布して、溶湯中のＯ2ガスをＣＯガスまた
はＣＯ2ガス等のガスとして除去するのである。Generally, when the O 2 gas contained in the molten metal is reduced by deoxidation, a reducing agent such as charcoal is generally sprayed on the surface of the molten metal so that the O 2 gas contained in the molten metal may be CO gas or CO 2 gas. It is removed as a gas such as CO 2 gas.
【０００５】しかしながら、実際にこのような還元にお
いては、還元剤を使用しているにも拘わらず、予測に反
して溶湯中のＯ2ガス含有量が低減しないことが多く発
生しており、初期の目的としたＯ2ガス量とすることが
保証されないという問題がある。However, in such a reduction, in many cases, despite the use of a reducing agent, the O 2 gas content in the molten metal did not decrease unexpectedly, and the initial stage often occurred. There is a problem that it is not guaranteed that the amount of O 2 gas is the target.
【０００６】そして、このような問題点を解決するため
に、本出願人は銅または銅合金溶湯中に不活性ガスを吹
き込むか、或いは、吹き付ける技術を開発し、効果をあ
げることができたが、しかし、さらに酸素低減効果を向
上させることが必要であるという問題が発生してきてい
る。In order to solve such a problem, the applicant of the present invention has succeeded in developing a technique for injecting or injecting an inert gas into a copper or copper alloy molten metal, which has been effective. However, there is a problem that it is necessary to further improve the oxygen reduction effect.
【０００７】さらに、上記に説明した技術を、実際に精
錬炉において実施した場合、通常は大気雰囲気において
行われるために、固体還元剤は大気の酸素と反応して消
費されるので多量の還元剤を必要とするという問題もあ
る。Further, when the above-described technique is actually carried out in a refining furnace, since it is usually carried out in an air atmosphere, the solid reducing agent reacts with oxygen in the air and is consumed, so a large amount of reducing agent is used. There is also the problem of requiring.
【０００８】[0008]
【発明が解決しようとする課題】本発明は上記に説明し
た従来における銅または銅合金溶湯中のＯ2ガスの除去
の問題点に鑑み、本発明者が鋭意研究を行い、検討を重
ねた結果、比較的に簡単な方法により、銅または銅合金
溶湯中のＯ2ガス含有量を著しく低減することができ、
かつ、固体還元剤の消費量を少なくできる銅または銅合
金の還元方法を開発したのである。DISCLOSURE OF THE INVENTION The present invention has been made by the present inventor after earnest studies and studies in view of the above-mentioned problems of removing O 2 gas from a conventional copper or copper alloy melt. The O 2 gas content in the molten copper or copper alloy can be significantly reduced by a relatively simple method,
At the same time, we have developed a method for reducing copper or copper alloys that can reduce the consumption of solid reducing agents.
【０００９】[0009]
【発明が解決しようとする課題】本発明に係る銅または
銅合金溶湯の還元法は、銅または銅合金溶湯の溶湯表面
に固体還元剤を均一に散布した後、この還元剤を銅また
は銅合金溶湯中に強制的に押し込むことにある。According to the method for reducing a molten copper or copper alloy according to the present invention, a solid reducing agent is uniformly sprayed on the molten metal surface of the molten copper or copper alloy, and then the reducing agent is added to the copper or copper alloy. It is to force it into the molten metal.
【００１０】本発明に係る銅または銅合金溶湯の還元法
について、以下詳細に説明する。The method for reducing copper or copper alloy melt according to the present invention will be described in detail below.
【００１１】即ち、銅または銅合金溶湯の表面に、固体
還元剤として、例えば、木炭を満遍なく均一に散布して
から、この還元剤の上に押さえ治具を載置してから、押
さえ治具を重りにより溶湯中に押し込むことにより、還
元剤は押さえ治具に押されて溶湯内に強制的に押し込ま
れ、溶湯と還元剤が接触することにより溶湯中のＯ2と
反応してＣＯまたはＣＯ2となって、押さえ治具に設け
られている複数個の穴から大気中に拡散し、溶湯中の酸
素濃度は効果的に低減することができる。That is, as a solid reducing agent, for example, charcoal is evenly and evenly dispersed as a solid reducing agent on the surface of the copper or copper alloy molten metal, and then a pressing jig is placed on the reducing agent, and then a pressing jig. When the reducing agent is pushed into the molten metal by a weight, the reducing agent is pushed by the pressing jig and forced into the molten metal, and when the molten metal and the reducing agent come into contact with each other, they react with O 2 in the molten metal to produce CO or CO. 2 is diffused into the atmosphere through a plurality of holes provided in the holding jig, and the oxygen concentration in the molten metal can be effectively reduced.
【００１２】このように、銅または銅合金溶湯中に固体
還元剤、例えば、木炭を溶湯中に押し込むことにより、
固体還元剤と上記溶湯とが接触することにより、溶湯の
還元は接触面で起きていることから、従って、固体還元
剤を溶湯中に押し込んで沈めることにより、溶湯と固体
還元剤との還元反応の起きる面積を増加させることがで
き、還元反応が促進されて溶湯中のＯ2は効果的に除去
することができるようになる。Thus, by pushing a solid reducing agent, such as charcoal, into the molten copper or copper alloy,
Since the solid reducing agent and the molten metal come into contact with each other, the reduction of the molten metal occurs at the contact surface. Therefore, by pushing the solid reducing agent into the molten metal and sinking it, the reduction reaction between the molten metal and the solid reducing agent is performed. It is possible to increase the area where the heat generation occurs, the reduction reaction is promoted, and O 2 in the molten metal can be effectively removed.
【００１３】本発明に係る銅または銅合金溶湯の還元方
法は、上記の構成であるが、溶湯中におけるＯ2ガスの
含有されている状態としては、酸化物（Ｃｕ2Ｏ）お
よびその他としての存在、また、溶湯中に溶解して存
在しているという２種の存在が確認されており、還元剤
として、例えば、木炭が溶湯に添加すると、下記の通
り、（木炭はＣとして示す。） 酸化物として存在するＯ2ガスは、Ｃｕ2Ｏ＋Ｃ→Ｃｕ＋
ＣＯ↑ ガスとして溶湯に溶解しているＯ2ガスは、Ｏ2＋Ｃ→Ｃ
Ｏ↑ の反応式に示すように、溶湯中のＣｕ2ＯおよびＯ2ガス
が木炭のＣにより還元され、ＣＯガスとして放出されて
いる。The method of reducing a molten copper or copper alloy according to the present invention has the above-mentioned constitution. However, the state in which O 2 gas is contained in the molten metal includes oxide (Cu 2 O) and other It has been confirmed that two kinds of substances are present, that is, they are present by being dissolved in the molten metal, and when, for example, charcoal is added to the molten metal as a reducing agent, it is as follows (charcoal is shown as C). O 2 gas existing as an oxide is Cu 2 O + C → Cu +
O 2 gas dissolved in the molten metal as CO ↑ gas is O 2 + C → C
As shown in the reaction formula of O ↑, Cu 2 O and O 2 gas in the molten metal are reduced by C of charcoal and released as CO gas.
【００１４】しかして、本発明に係る銅または銅合金溶
湯の還元方法における溶湯中に溶解しているＯ2ガスの
挙動を実測した結果によると、還元反応前に溶湯中に含
有されているＯ2ガスは全て酸化物（ＣｕＯ、Ｃｕ2Ｏそ
の他）であると考えられ、溶湯中には溶解したＯ2ガス
は含有されていないことを確認した。However, according to the result of actual measurement of the behavior of the O 2 gas dissolved in the molten metal in the method for reducing a copper or copper alloy molten metal according to the present invention, the O contained in the molten metal before the reduction reaction is measured. It was confirmed that the 2 gases were all oxides (CuO, Cu 2 O, etc.), and it was confirmed that the molten metal did not contain dissolved O 2 gas.
【００１５】従って、このことから還元反応は以下示す
通りの式と予測され、即ち、溶湯中に固体還元剤として
の木炭が押し込まれれると、 Ｃｕ2Ｏ＋Ｃ→Ｃｕ＋Ｏ2↑ Ｃ＋Ｏ2→ＣＯ2↑ のように、主として溶湯中のＣｕＯ或いはＣｕ2ＯがＣ
（木炭）なより還元される反応だけが生じ、この反応に
より生じたＯ2ガスやこのＯ2ガスがＣ（木炭）と反応し
たＣＯ2ガスとして存在することが考えられる。これを
裏付けるために溶湯を上記の方法により改めて測定を行
った結果、ＣＯガスに代わり、Ｏ2ガスおよびＣＯ2ガス
が認められた。Therefore, from this fact, the reduction reaction is predicted as the following formula, that is, when charcoal as a solid reducing agent is pushed into the molten metal, Cu 2 O + C → Cu + O 2 ↑ C + O 2 → CO 2 ↑ Like CuO or Cu 2 O in the molten metal
It is conceivable that only a reaction of reducing (charcoal) occurs, and O 2 gas generated by this reaction and this O 2 gas exist as CO 2 gas that has reacted with C (charcoal). To support this, the molten metal was measured again by the above method, and as a result, O 2 gas and CO 2 gas were found instead of CO gas.
【００１６】しかしながら、本発明に係る銅または銅合
金の還元方法においては、溶湯中に固体還元剤が押し込
まれて沈められていることにより、上記に説明したよう
に、たとえ、Ｏ2ガスが存在していても、直ちに溶湯中
の固体還元剤と接触することにより、 Ｏ2＋Ｃ→ＣＯ2 の反応が起こり、ＣＯ2ガスとなり、押さえ治具の穴を
通過して大気中に放出されるのである。However, in the method for reducing copper or copper alloy according to the present invention, since the solid reducing agent is pushed into the molten metal to be submerged therein, as described above, even if O 2 gas is present. However, if it comes into contact with the solid reducing agent in the molten metal immediately, the reaction of O 2 + C → CO 2 occurs, and it becomes CO 2 gas, which passes through the hole of the holding jig and is released into the atmosphere. is there.
【００１７】通常、固体還元剤による銅または銅合金溶
湯の還元方法は、大気雰囲気において行われるのである
が、この場合固体還元剤は溶湯中のＯ2ガスと反応する
だけではなく、大気中のＯ2ガスとの反応が起きるので
多量の固体還元剤が消費されるものであるが、本発明に
係る銅または銅合金の還元方法では、固体還元剤が溶湯
中に押さえ治具により沈められているので、押さえ治具
により固体還元剤と大気との接触が少なくなり、固体還
元剤の消費量を低減することができる。Usually, the method for reducing a molten copper or copper alloy with a solid reducing agent is carried out in an atmospheric atmosphere. In this case, the solid reducing agent not only reacts with O 2 gas in the molten metal, but also in the atmosphere. Since a reaction with O 2 gas occurs, a large amount of solid reducing agent is consumed, but in the method for reducing copper or copper alloy according to the present invention, the solid reducing agent is immersed in the molten metal by a pressing jig. Since the holding jig reduces the contact between the solid reducing agent and the atmosphere, the consumption of the solid reducing agent can be reduced.
【００１８】[0018]
【実 施 例】本発明に係る銅または銅合金溶湯の還元
方法について、以下実施例を説明する。[Examples] Examples of the method for reducing molten copper or copper alloy according to the present invention will be described below.
【００１９】[0019]
【実 施 例 】以下の条件により銅溶湯の還元を行っ
た。 銅溶解量 ２５０ｋｇ 溶解温度 １２５０℃ 木炭量 ５〜１０ｋｇ 銅溶湯酸素量調整 大気溶解＋ＣｕＯ添加[Examples] The molten copper was reduced under the following conditions. Copper dissolution amount 250 kg Melting temperature 1250 ° C Charcoal amount 5-10 kg Copper melt oxygen amount adjustment Air melting + CuO addition
【００２０】この条件において、図１、図２、図３に示
す装置により、銅溶湯の還元を行った。図１は溶湯表面
に固体還元剤を散布した場合の例であり、図２は溶湯表
面に固体還元剤を散布し、溶湯中にＡｒガスを吹き込ん
だ場合の例であり、図３は本発明に係る銅または銅合金
の還元方法を示す例であり、即ち、溶湯表面に固体還元
剤を散布し、固体還元剤の上に押さえ治具を載置して、
重りにより固体還元剤を溶湯中に押し込む場合である。Under these conditions, the molten copper was reduced by the apparatus shown in FIGS. 1, 2 and 3. FIG. 1 shows an example in which a solid reducing agent is sprayed on the surface of the molten metal, FIG. 2 shows an example in which a solid reducing agent is sprayed on the surface of the molten metal, and Ar gas is blown into the molten metal. It is an example showing a method for reducing copper or copper alloy according to, that is, a solid reducing agent is sprinkled on the surface of the molten metal, a pressing jig is placed on the solid reducing agent,
In this case, the solid reducing agent is pushed into the molten metal by the weight.
【００２１】図１、図２および図３において、１は坩
堝、２は加熱炉または保温炉、３は溶湯との反応性の少
ない、かつ、強度を有するＣ／Ｃコンポジットにより作
成されている押さえ治具、４は押さえ治具に削設されて
いる反応により生成したガスを抜くための直径１０φの
ガス抜き穴、５は重り、６は固体還元剤、７はＡｒガ
ス、８はＡｒガス吹き込みバイプ、Ｍは溶湯である。な
お、図４は押さえ治具の拡大平面図、図５は押さえ治具
の拡大断面図である。In FIGS. 1, 2 and 3, 1 is a crucible, 2 is a heating furnace or a heat-retaining furnace, and 3 is a presser made of a C / C composite which has little reactivity with molten metal and has strength. A jig 4 is a gas vent hole having a diameter of 10φ for venting the gas generated by the reaction that is cut in the holding jig, 5 is a weight, 6 is a solid reducing agent, 7 is Ar gas, 8 is Ar gas blown Bipe and M are molten metal. 4 is an enlarged plan view of the holding jig, and FIG. 5 is an enlarged sectional view of the holding jig.
【００２２】上記に説明した各例により還元を行い、溶
湯中の酸素量を測定した結果を図６に示す。即ち、図６
において、図１の固体還元剤を溶湯表面に散布した場合
の酸素量の経時変化を□、図２の固体還元剤を散布し、
Ａｒガスを吹き込んだ場合の酸素量の経時変化を＋、図
３の本発明に係る銅または銅合金の還元方法を◇で示し
てある。そして、この図６から明らかなように、本発明
に係る銅または銅合金溶湯の還元方法の場合、酸素量の
低減速度は消費固体還元剤を強制的に押し込んだ時が最
も早くなっている。FIG. 6 shows the result of measuring the amount of oxygen in the molten metal by performing the reduction in each of the examples described above. That is, FIG.
□, the time course of the oxygen amount when the solid reducing agent of FIG.
The change with time in the oxygen amount when Ar gas is blown in is indicated by +, and the reduction method of copper or copper alloy according to the present invention in FIG. 3 is indicated by ⋄. Further, as is clear from FIG. 6, in the method of reducing the copper or copper alloy melt according to the present invention, the reduction rate of the oxygen amount is the fastest when the consumed solid reducing agent is forcedly pushed.
【００２３】また、表１に上記の各例において、９０分
還元を行った場合の溶湯中の酸素量と消費固体還元剤を
示してあり、この表１からも本発明に係る銅または銅合
金溶湯の還元方法が、最も酸素量が低くなっており、ま
た、固体還元剤の消費量も少なくなっていることがわか
る。Further, Table 1 shows the amount of oxygen in the molten metal and the solid reducing agent consumed in the case of performing the reduction for 90 minutes in each of the above examples. It can be seen that the molten metal reduction method has the lowest oxygen content and the solid reducing agent consumption is also small.
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【発明の効果】以上説明したように、本発明に係る銅ま
たは銅合金溶湯の還元方法は上記の構成であるから、溶
湯中に固体還元剤を強制的に押し込んで沈めることによ
り、溶湯と固体還元剤との接触面積が増大して溶湯中の
還元反応を促進し、溶湯中の酸素量を効果的に低減する
ことができるものであり、さらに、消費固体還元剤の量
も非常に少ないという優れた効果を有するものである。As described above, since the method for reducing molten copper or copper alloy according to the present invention has the above-mentioned constitution, by forcing the solid reducing agent into the molten metal to sunk it, the molten metal and solid The contact area with the reducing agent is increased to promote the reduction reaction in the molten metal, and the amount of oxygen in the molten metal can be effectively reduced. Furthermore, the amount of solid reducing agent consumed is very small. It has an excellent effect.
【図１】溶湯表面に固体還元剤を散布した場合の例を示
す図である。FIG. 1 is a diagram showing an example of a case where a solid reducing agent is sprayed on the surface of a molten metal.
【図２】溶湯表面に固体還元剤を散布し、Ａｒガスを吹
き込んだ場合の例を示す図である。FIG. 2 is a diagram showing an example of a case where a solid reducing agent is sprayed on the surface of a molten metal and Ar gas is blown in.
【図３】本発明に係る銅または銅合金溶湯の還元反応を
実施する場合の例を示す図である。FIG. 3 is a diagram showing an example of a case where a reduction reaction of molten copper or copper alloy according to the present invention is carried out.
【図４】押さえ治具の拡大平面図である。FIG. 4 is an enlarged plan view of a holding jig.
【図５】押さえ治具の拡大断面図である。FIG. 5 is an enlarged sectional view of a holding jig.
【図６】溶湯中の酸素量の経時変化を示す図である。FIG. 6 is a diagram showing changes over time in the amount of oxygen in the molten metal.
１・・・坩堝 ２・・・加熱炉または保温炉 ３・・・押さえ治具 ４・・・ガス抜き穴 ５・・・重り ６・・・固体還元剤 ７・・・Ａｒガス ８・・・Ａｒガス吹き込みバイプ Ｍ・・・溶湯 DESCRIPTION OF SYMBOLS 1 ... Crucible 2 ... Heating furnace or heat insulation furnace 3 ... Holding jig 4 ... Gas vent hole 5 ... Weight 6 ... Solid reducing agent 7 ... Ar gas 8 ... Ar gas blown vapor M ... Molten metal
Claims (1)
元剤を均一に散布した後、この還元剤を銅または銅合金
溶湯中に強制的に押し込むことを特徴とする銅または銅
合金溶湯の還元法。1. A copper or copper alloy molten metal characterized in that a solid reducing agent is uniformly sprayed on the surface of the molten copper or copper alloy molten metal, and the reducing agent is forcedly pushed into the copper or copper alloy molten metal. Reduction method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3270992A JPH05195104A (en) | 1992-01-23 | 1992-01-23 | Reduction method of molten copper or copper alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3270992A JPH05195104A (en) | 1992-01-23 | 1992-01-23 | Reduction method of molten copper or copper alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05195104A true JPH05195104A (en) | 1993-08-03 |
Family
ID=12366372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3270992A Withdrawn JPH05195104A (en) | 1992-01-23 | 1992-01-23 | Reduction method of molten copper or copper alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05195104A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008174781A (en) * | 2007-01-17 | 2008-07-31 | Kobe Steel Ltd | Carbonaceous reducing agent for producing copper alloy containing active metal |
-
1992
- 1992-01-23 JP JP3270992A patent/JPH05195104A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008174781A (en) * | 2007-01-17 | 2008-07-31 | Kobe Steel Ltd | Carbonaceous reducing agent for producing copper alloy containing active metal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990408 |