JPH06212301A - Method for smelting copper or copper alloy - Google Patents
Method for smelting copper or copper alloyInfo
- Publication number
- JPH06212301A JPH06212301A JP537893A JP537893A JPH06212301A JP H06212301 A JPH06212301 A JP H06212301A JP 537893 A JP537893 A JP 537893A JP 537893 A JP537893 A JP 537893A JP H06212301 A JPH06212301 A JP H06212301A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- copper
- slag
- oxides
- copper alloy
- 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.)
- Granted
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000010949 copper Substances 0.000 title claims abstract description 37
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 36
- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 31
- 238000003723 Smelting Methods 0.000 title abstract 2
- 229910052751 metal Inorganic materials 0.000 claims abstract description 107
- 239000002184 metal Substances 0.000 claims abstract description 107
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 46
- 239000001301 oxygen Substances 0.000 claims abstract description 46
- 239000002893 slag Substances 0.000 claims abstract description 45
- 239000012535 impurity Substances 0.000 claims abstract description 27
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 20
- 229910052714 tellurium Inorganic materials 0.000 claims abstract description 19
- 238000002844 melting Methods 0.000 claims abstract description 18
- 230000008018 melting Effects 0.000 claims abstract description 18
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 150000001339 alkali metal compounds Chemical class 0.000 claims abstract description 10
- 239000011261 inert gas Substances 0.000 claims description 24
- 238000007664 blowing Methods 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 17
- 239000007787 solid Substances 0.000 claims description 16
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 239000000155 melt Substances 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000010309 melting process Methods 0.000 claims 1
- 229910052718 tin Inorganic materials 0.000 abstract description 3
- 239000010953 base metal Substances 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 26
- 230000002093 peripheral effect Effects 0.000 description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 239000003610 charcoal Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 230000005612 types of electricity Effects 0.000 description 1
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、不純物としてＳｂ，Ａ
ｓ，Ｔｅ等を含む銅または銅合金原料（銅屑または銅合
金屑あるいはブリスターと呼ばれる精練前の銅原料等）
から、高純度の銅または銅合金を溶製する方法の改良に
関するものである。BACKGROUND OF THE INVENTION The present invention uses Sb, A as impurities.
Copper or copper alloy raw material containing s, Te, etc. (copper raw material or copper alloy raw material or copper raw material before scouring called blister)
Therefore, the present invention relates to an improvement in the method for producing high-purity copper or copper alloy.
【０００２】[0002]
【従来の技術】銅および銅合金は優れた伝熱性や導電性
を有していると共に、耐食性や加工性においても非常に
優れたものであり、電気・電子分野や熱交換器分野をは
じめとして多分野に亘って広く活用されている。しかし
銅は鉄鋼材料に比べて原料鉱石の埋蔵量が少なく高価で
あるところから、資源保護の観点からもスクラップの回
収再利用が重要な課題となっている。2. Description of the Related Art Copper and copper alloys have excellent heat conductivity and conductivity, as well as excellent corrosion resistance and workability, and are used in the electric and electronic fields and heat exchanger fields. It is widely used in many fields. However, since copper has less reserves of raw material ore than steel materials and is expensive, recovery and recycling of scrap is an important issue from the viewpoint of resource conservation.
【０００３】しかし、前述の如く銅または銅合金の応用
分野が拡大し、更には用途に応じて様々の機能改善が加
えられるにつれて、屑銅等として回収されるスクラップ
中に含まれる不純物も多岐に亘り、従来例では殆ど混入
することのなかったＳｂ，Ａｓ，Ｔｅ等の不純元素の混
入も見られる様になってきた。そしてこれらＳｂ，Ａ
ｓ，Ｔｅ等は低融点物であり、回収再生品にそのまま不
純物として残存すると、共晶の溶融による割れ発生の原
因になるなど再生品の品質に多大な悪影響を及ぼす。However, as the application fields of copper or copper alloys are expanded as described above, and further various functional improvements are added depending on the applications, impurities contained in scraps recovered as scrap copper and the like are also diversified. In the meantime, it has become possible to see contamination of impure elements such as Sb, As, Te, which were hardly mixed in the conventional example. And these Sb, A
Since s, Te, etc. are low melting point substances, if they remain as impurities in the recovered recycled product as they are, they may cause cracking due to melting of the eutectic and have a great adverse effect on the quality of the recycled product.
【０００４】そこでこれらの不純元素を溶製段階で除去
する方法についても研究が進められ、１つとして溶製段
階でアルカリ金属炭酸塩を添加しＮａ等とＳｂ，Ａｓ，
Ｔｅ等との複合酸化物として湯面に浮上させることによ
り原料溶湯から除去する方法が提案された。Therefore, research has been conducted on a method of removing these impure elements at the melting stage. One of them is to add an alkali metal carbonate at the melting stage to add Na, Sb, As,
A method has been proposed in which a complex oxide with Te or the like is floated on the molten metal surface to remove it from the molten material.
【０００５】しかしこの方法は学問的には有効な方法で
あるが、工業的規模での実用性を考えると、生成するノ
ロの除去が困難であるという大きな欠点がある。即ち不
純物の除去のために添加される炭素塩は、銅や銅合金に
比べて非常に低融点であり、除去すべきＳｂ，Ａｓ，Ｔ
ｅ等との反応によって高温の溶湯表面に浮上する滓（ノ
ロ）は低粘性であるので、あたかも水の上に油が浮上し
ている様な状態となり、高温のノロの汲み出しが非常に
困難であるほか、汲み出し時における溶湯とノロの混合
による溶湯の汚染、あるいはノロと共に汲み出される溶
湯によるメタルロスも避けられず、そのため実用規模で
実施されるまでには至っておらない。However, although this method is academically effective, it has a major drawback in that it is difficult to remove the produced roe when considering its practical use on an industrial scale. That is, the carbon salt added for removing impurities has a very low melting point as compared with copper and copper alloys, and Sb, As, T which should be removed.
The slag (Noro) that floats on the surface of the molten metal at a high temperature due to the reaction with e, etc. has a low viscosity, so it looks as if oil was floating above the water, making it very difficult to pump out the hot Noro. In addition, contamination of the molten metal due to mixing of the molten metal and slag at the time of pumping, or metal loss due to the molten metal pumped out with the slag is unavoidable, and therefore has not been implemented on a practical scale.
【０００６】[0006]
【発明が解決しようとする課題】本発明は上記の様な事
情に着目してなされたものであって、その目的は、銅ま
たは銅合金原料に含まれるＳｂ，Ａｓ，Ｔｅ等の不純元
素を、溶製段階で簡単に且つ効率よく除去することので
きる技術を確立しようとするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and its purpose is to remove impurities such as Sb, As and Te contained in copper or copper alloy raw materials. , It aims to establish a technology that can be easily and efficiently removed in the melting stage.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決すること
のできた本発明に係る溶製法の構成は、不純物として少
なくともＳｂ，ＡｓおよびＴｅの１種以上を含む銅また
は銅合金原料を用いて銅または銅合金を溶製するに当た
り、該銅または銅合金原料の溶湯中に酸素源を供給して
該溶湯中の酸素濃度を１０００ｐｐｍ以上とし、アルカ
リ金属化合物を加えて上記不純物元素の酸化物を捕捉
し、次いでＦｅ，Ｆｅ酸化物、ＭｎおよびＭｎ酸化物よ
りなる群から選択される少なくとも１種を添加してから
除滓した後、前記溶湯を還元するところに要旨を有する
ものである。The composition of the melting method according to the present invention, which was able to solve the above-mentioned problems, is to use a copper or copper alloy raw material containing at least one or more of Sb, As and Te as impurities. Alternatively, in melting a copper alloy, an oxygen source is supplied into the molten metal of the copper or copper alloy raw material so that the oxygen concentration in the molten metal is 1000 ppm or more, and an alkali metal compound is added to capture the oxides of the above impurity elements. Then, at least one selected from the group consisting of Fe, Fe oxide, Mn, and Mn oxide is added, and after slag removal, the molten metal is reduced.
【０００８】尚、除滓後の最終工程で実施される還元
は、酸化性雰囲気で行なわれる不純物除去工程で溶湯中
に混入してくる酸素を除去するために行なわれるもので
あり、この場合、溶湯表面に木炭等の固体還元剤を添加
し、該溶湯中に不活性ガスを吹込む方法（より好ましく
はガス吹込みノズルの開口部を１２０ｍ／分程度以上の
周速度で回転させながら不活性ガスを吹込む方法）を採
用すれば、還元を短時間で効率よく進めることができる
ので好ましい。The reduction carried out in the final step after the slag removal is carried out in order to remove oxygen mixed in the molten metal in the impurity removal step carried out in an oxidizing atmosphere. In this case, A method in which a solid reducing agent such as charcoal is added to the surface of the molten metal and an inert gas is blown into the molten metal (more preferably, the opening of the gas blowing nozzle is rotated while rotating at a peripheral speed of about 120 m / min or more. It is preferable to adopt a method of blowing a gas) because the reduction can be efficiently advanced in a short time.
【０００９】[0009]
【作用】本発明では、まず銅または銅合金原料の溶解が
行なわれる。銅原料としては、電線等の表面の樹脂被膜
を焼却してなる銅焼線屑、Ｎｉめっき銅線屑、熱交換器
などの廃材から得たフィン材、板材、管材、あるいはそ
の他各種の電気、電子部品廃材等、銅製品の切削加工等
で生じた切削等の屑材あるいはブリスター等が使用さ
れ、これらは場合によっては精練銅の残り湯あるいは鋳
造工程で生じることのある残り湯等と混合して使用する
こともできる。尚溶解炉としては、反射炉や誘導溶解炉
など公知のものを使用すればよい。In the present invention, first, the copper or copper alloy raw material is melted. Examples of the copper raw material include copper burned wire scraps obtained by incinerating the resin coating on the surface of electric wires, Ni-plated copper wire scraps, fin materials obtained from waste materials such as heat exchangers, plate materials, pipe materials, and various other types of electricity, Waste materials such as scraps of electronic parts such as scrap of copper products produced by cutting of copper products, blisters, etc. are used, and in some cases, they are mixed with the remaining hot water of refined copper or the residual hot water that may occur during the casting process. It can also be used. As the melting furnace, a known furnace such as a reflection furnace or an induction melting furnace may be used.
【００１０】次いで該溶湯に固体状および／もしくは気
体状の酸素源を供給して溶湯中に含まれる不純元素を酸
化物として滓化させる。このとき、溶湯中にアルカリ金
属化合物を添加しておくと、溶湯中のＳｂ，Ａｓ，Ｔｅ
等はアルカリ金属化合物と共に複合酸化物を形成し、滓
化して湯面上へ浮上する。しかしこの酸化工程でＳｂ，
Ａｓ，Ｔｅを効率良く酸化して湯面上に浮上分離させる
には、溶湯中の酸素濃度が１０００ｐｐｍ以上となる様
に酸素源の供給量を設定する必要がある。Then, a solid and / or gaseous oxygen source is supplied to the molten metal to impure the impure elements contained in the molten metal as oxides. At this time, if an alkali metal compound is added to the molten metal, Sb, As, Te in the molten metal may be added.
And the like form a complex oxide together with the alkali metal compound, slag and float on the surface of the molten metal. However, Sb,
In order to efficiently oxidize As and Te to float and separate on the molten metal surface, it is necessary to set the supply amount of the oxygen source so that the oxygen concentration in the molten metal is 1000 ppm or more.
【００１１】ちなみに図１は、Ｓｂ，Ａｓ，およびＴｅ
の各含有量が夫々に３０００ｐｐｍとなる様に成分調整
した銅合金溶湯を使用し、これを酸化処理したときの溶
湯中の酸素濃度とＳｂ，Ａｓ，Ｔｅの各含有率との関係
を実験的に調べた結果を示したグラフ（但し除滓材とし
て炭酸ソーダを使用）であり、この図からも明らかであ
る様に、溶湯中の酸素濃度が１０００ｐｐｍ以上となる
様に酸化処理条件を設定してやれば、溶湯中に含まれる
Ｓｂ，Ａｓ，Ｔｅは大部分が酸化され、滓化して湯面上
に浮上分離することが分かる。このとき溶湯中の酸素濃
度を５０００ｐｐｍ以上にしてやれば、溶湯中のＳｂ，
Ａｓ，Ｔｅはいずれも根跡量にまで低減される。Incidentally, FIG. 1 shows Sb, As, and Te.
The relationship between the oxygen concentration in the molten metal and the contents of Sb, As, and Te when the copper alloy molten metal whose components were adjusted so that each content of each of them was 3000 ppm was used, was experimentally investigated. It is a graph showing the results of the examination (however, using sodium carbonate as a slag removal material). As is clear from this figure, set the oxidation treatment conditions so that the oxygen concentration in the molten metal is 1000 ppm or more. For example, it can be seen that most of Sb, As, and Te contained in the molten metal are oxidized, converted into slag, and floated and separated on the molten metal surface. At this time, if the oxygen concentration in the molten metal is set to 5000 ppm or more, Sb in the molten metal,
Both As and Te are reduced to the trace amount.
【００１２】ここで使用される固体状酸素源としてはＣ
ｕＯ等が使用され、また気体状酸素源としては酸素もし
くは空気が使用されるが、経済性等を考慮して一般的な
のは空気等の気体状酸素源である。固体状酸素源は、溶
湯表面に散布する方法あるいは溶湯内へキャリヤガスと
共に吹込む方法のどちらを採用してもよいが、効率がよ
いのは溶湯内へ吹込む方法である。また気体状酸素源
は、溶湯表面に向けて上吹きする方法あるいは溶湯内へ
吹込む方法によって供給されるが、より好ましいのは溶
湯内へ吹込む方法である。The solid oxygen source used here is C
uO or the like is used, and oxygen or air is used as the gaseous oxygen source, but a gaseous oxygen source such as air is generally used in consideration of economical efficiency and the like. The solid oxygen source may be either a method of spraying on the surface of the molten metal or a method of blowing into the molten metal together with a carrier gas, but the method of being efficient is the method of blowing into the molten metal. Further, the gaseous oxygen source is supplied by a method of blowing upward toward the surface of the molten metal or a method of blowing it into the molten metal, but a method of blowing it into the molten metal is more preferable.
【００１３】尚上記の固体状酸素源および気体状酸素源
は夫々一方のみを用いて行なってもよく、あるいは両者
を併用することも可能であり、たとえば固体状酸素源を
溶湯表面に散布してから気体状酸素源を溶湯内へ吹込む
方法、あるいは固体状酸素源を気体状酸素源と共に溶湯
内へ吹込む方法を採用することもできる。いずれの方法
を採用するにしても、溶湯中の酸素濃度が１０００ｐｐ
ｍ以上、より好ましくは５０００ｐｐｍとなる様に酸化
条件を設定すると共に、溶湯中にアルカリ金属化合物を
添加してやれば、Ｓｂ，Ａｓ，Ｔｅ等の不純物は該アル
カリ金属化合物と複合酸化物を形成して滓化する。The solid oxygen source and the gaseous oxygen source may be used alone or in combination, for example, by spraying the solid oxygen source on the surface of the molten metal. It is also possible to employ a method of blowing a gaseous oxygen source into the molten metal from the above, or a method of blowing a solid oxygen source into the molten metal together with the gaseous oxygen source. Whichever method is adopted, the oxygen concentration in the molten metal is 1000 pp
If the oxidation conditions are set so that the concentration becomes m or more, more preferably 5000 ppm, and an alkali metal compound is added to the molten metal, impurities such as Sb, As and Te form a complex oxide with the alkali metal compound. Turn into slag.
【００１４】尚該溶湯中に他の不純物としてＳｎ，Ｆ
ｅ，Ｚｎ等が含まれている場合は、これらの不純元素は
上記酸素濃度に調整することによって同時に酸化され、
溶湯表面に浮上分離される。Sn, F as other impurities in the molten metal
When e, Zn, etc. are contained, these impure elements are simultaneously oxidized by adjusting the oxygen concentration to the above,
It floats and separates on the surface of the molten metal.
【００１５】このとき添加されるアルカリ金属化合物と
しては、アルカリ金属の炭酸塩、水酸化物、硫酸塩、硝
酸塩等が例示されるが、コストや取扱い性等を考慮して
最も一般的なのは炭酸塩、中でも炭酸ナトリウムであ
る。またその添加量は不純物元素の含有量によっても変
わってくるので一律に決めることはできない。しかしこ
れら不純物元素の含有量は一般に非常に少量であるか
ら、通常は被処理溶湯に対し重量で０．０１〜６％のア
ルカリ金属化合物を添加することにより目的を十分に果
たすことができる。Examples of the alkali metal compound added at this time include carbonates, hydroxides, sulfates and nitrates of alkali metals, but the most common are carbonates in view of cost and handling. Among them, sodium carbonate. Further, the addition amount thereof varies depending on the content of the impurity element, and therefore cannot be uniformly determined. However, since the contents of these impurity elements are generally very small, the purpose can usually be sufficiently achieved by adding 0.01 to 6% by weight of an alkali metal compound to the molten metal to be treated.
【００１６】但しこの複合酸化物は低融点であり、１２
００℃程度の溶湯温度条件下では低粘性の液状物である
ため、前述の如くその除去が非常に困難である。そこで
本発明では、この複合酸化物の除去を容易にするための
手段として、該溶湯にＦｅ，Ｆｅ酸化物，Ｍｎ，Ｍｎ酸
化物〔以下Ｆｅ（Ｍｎ）酸化物と略記する〕よりなる群
から選択される１種以上を除滓材として添加し、上記複
合酸化物をＦｅ酸化物および／もしくはＭｎ酸化物に捕
捉し、あるいはこれらと複合酸化物を形成することによ
ってノロの粘性を高めると共に、銅または銅合金溶湯と
の濡れ性を低下させることにより除滓性を高めるもので
ある。However, this composite oxide has a low melting point,
Under the molten metal temperature condition of about 00 ° C., since it is a low-viscosity liquid substance, it is very difficult to remove it as described above. Therefore, in the present invention, as a means for facilitating the removal of this composite oxide, the molten metal is selected from the group consisting of Fe, Fe oxide, Mn, and Mn oxide [hereinafter abbreviated as Fe (Mn) oxide]. At least one selected from the above is added as a slag material, and the composite oxide is captured by Fe oxide and / or Mn oxide, or by forming a composite oxide with them, the viscosity of Noro is increased, It improves the slag removal property by reducing the wettability with copper or a molten copper alloy.
【００１７】即ちＦｅ酸化物やＭｎ酸化物は、アルカリ
金属と前記不純物元素との複合酸化物に比べて格段に高
融点であるばかりでなく、銅または銅合金溶湯との濡れ
性も小さく、従ってＦｅ（Ｍｎ）酸化物を添加すると、
溶湯表面の前記複合酸化物（ノロ）は該Ｆｅ（Ｍｎ）酸
化物に吸着し、もしくはこれらと更に複合酸化物を形成
して、低流動性で溶湯との濡れ性の低い滓となる。従っ
てこの状態で除滓を行なえば、前述の様な問題を生じる
ことなくノロを簡単に効率よく除去することができる。
尚、ＦｅやＭｎは酸素濃度の高められた溶湯上で酸化さ
れて夫々の酸化物に変わるので、酸化物として添加した
場合と実質的に同様の効果を発揮する。That is, the Fe oxide and the Mn oxide have not only a remarkably high melting point as compared with the complex oxide of the alkali metal and the impurity element, but also have a low wettability with the copper or copper alloy melt, When Fe (Mn) oxide is added,
The complex oxide (NORO) on the surface of the molten metal is adsorbed to the Fe (Mn) oxide or forms a complex oxide with them, and becomes a slag having low fluidity and low wettability with the molten metal. Therefore, if the slag is removed in this state, the slag can be easily and efficiently removed without causing the problems described above.
Since Fe and Mn are oxidized into the respective oxides on the molten metal having an increased oxygen concentration, substantially the same effect as when added as oxides is exhibited.
【００１８】ちなみに図２は、前記図１に示した実験に
おいて、溶湯の酸素量を５０００ｐｐｍとし溶湯重量に
対し１重量％の炭酸ナトリウムを造滓剤として添加する
ことにより生成したノロを除滓する際に、除滓剤として
Ｆｅ2 Ｏ3 またはＭｎＯ2 を添加した場合（溶湯重量に
対し１％）と添加しなかった場合の除滓率を調べた結果
を示したものであり、Ｆｅ（Ｍｎ）酸化物を添加するこ
とにより除滓率は飛躍的に向上している。こうした傾向
はＦｅやＭｎを金属として添加した場合も、これらが酸
化性雰囲気下で酸化物に変化するので、ほぼ同様の結果
が得られる。Incidentally, FIG. 2 removes the slag produced by adding 1% by weight of sodium carbonate as a slag forming agent to the molten metal in the experiment shown in FIG. 1 with the oxygen content of 5000 ppm and the weight of the molten metal. At this time, the results of examining the slag removal rate with and without addition of Fe 2 O 3 or MnO 2 as a slag removal agent (1% based on the weight of the molten metal) are shown. ) By adding oxide, the slag removal rate is dramatically improved. Even when Fe or Mn is added as a metal, such a tendency is changed to an oxide in an oxidizing atmosphere, and therefore almost the same result is obtained.
【００１９】また上記実験において、Ｆｅ（Ｍｎ）酸化
物を添加した場合と添加しなかった場合のノロの状態を
比較すると、前者（酸化物添加）の場合、ノロは半固形
状を呈し湯離れも良好であるのに対し、後者（酸化物無
添加）の場合、ノロは溶湯表面に液状で流延していて湯
離れも非常に悪く、除滓が非常に困難であった。In addition, in the above experiment, comparing the state of the Noro with and without addition of the Fe (Mn) oxide, in the former case (with the oxide added), the Noro exhibited a semi-solid state and the molten iron was removed. On the other hand, in the latter case (without addition of an oxide), Noro was cast in a liquid state on the surface of the molten metal, so that the molten metal was very poorly separated and it was very difficult to remove slag.
【００２０】尚、Ｆｅ（Ｍｎ）酸化物の添加法として
は、溶湯表面に散布する方法、キャリアガスを用いて溶
湯内へ吹込む方法、あるいはこれらを併用する方法等を
採用することができる。またＦｅやＭｎを使用する場合
も同様の添加法を採用すればよい。As a method of adding the Fe (Mn) oxide, a method of spraying on the surface of the molten metal, a method of blowing it into the molten metal by using a carrier gas, a method of using these in combination, or the like can be adopted. Further, when Fe or Mn is used, a similar addition method may be adopted.
【００２１】上記の様にＦｅ（Ｍｎ）酸化物は除滓剤と
して優れた機能を発揮するが、これらは溶湯中に含まれ
ることのある更に他の不純物元素を除去するうえでも有
効に作用する。即ち溶湯中に他の不純物元素としてＰ
ｂ，Ｎｉ，Ｓｎ，Ｓ，Ｂｉ等が含まれている場合、これ
らは比較的酸化され難いため前述の酸化処理だけでは十
分に除去され難いが、溶湯中にＦｅ（Ｍｎ）酸化物を添
加すると、これらの不純物元素もＦｅ（Ｍｎ）酸化物と
複合酸化物を形成して容易に滓化するので、これら不純
物元素も同時に効率よく除去されることになり、銅また
は銅合金溶湯の不純物濃度は全体として著しく低減され
る。As described above, the Fe (Mn) oxide exerts an excellent function as a slag remover, but these also effectively act to remove other impurity elements which may be contained in the molten metal. . That is, P as another impurity element in the molten metal.
When b, Ni, Sn, S, Bi, etc. are contained, they are relatively difficult to oxidize, and therefore cannot be sufficiently removed only by the above-mentioned oxidation treatment, but when Fe (Mn) oxide is added to the molten metal, Since these impurity elements also form Fe (Mn) oxide and complex oxides and easily slag, these impurity elements are efficiently removed at the same time, and the impurity concentration of the copper or copper alloy melt is It is significantly reduced as a whole.
【００２２】上記の様にして除滓した後は、溶湯の還元
処理が行なわれる。即ち前述の不純物除去工程では、不
純物元素を酸化し滓化するため相当量の酸素源が供給さ
れるので、除滓を終えた銅または銅合金溶湯内には多量
（１０００ｐｐｍ以上）の酸素が含まれており、銅また
は銅合金としての規格を満たすには、酸素濃度を多くと
も２００ｐｐｍ程度以下にまで低減するための還元工程
が必須となる。After the slag is removed as described above, the molten metal is reduced. That is, in the above-mentioned impurity removal step, since a considerable amount of oxygen source is supplied to oxidize and slag the impurity elements, a large amount (1000 ppm or more) of oxygen is contained in the copper or copper alloy molten metal after the slag removal. Therefore, in order to meet the standard of copper or copper alloy, a reduction process for reducing the oxygen concentration to about 200 ppm or less is essential.
【００２３】この還元は公知の方法に従って行なうこと
も勿論可能であるが、前述の酸化工程を経た溶湯の酸素
濃度は前述の如く非常に高いので、該溶湯の酸素濃度を
工業的に利用可能な短時間で目標レベルにまで低減する
には、下記の様な還元法を採用することが望まれる。そ
の方法とは、溶湯表面に固体還元剤（木炭等）を添加し
た後、該溶湯内へ不活性ガスを吹込む方法である。This reduction can of course be carried out according to a known method, but since the oxygen concentration of the molten metal that has undergone the above-mentioned oxidation step is extremely high as described above, the oxygen concentration of the molten metal can be industrially used. In order to reduce to the target level in a short time, it is desirable to adopt the following reduction method. The method is a method in which a solid reducing agent (charcoal or the like) is added to the surface of the molten metal and then an inert gas is blown into the molten metal.
【００２４】即ち溶湯表面に木炭等の固体還元剤を添加
すると、湯面で還元反応が起こってＣＯ2 やＣＯ等のガ
スが生成し、その一部は上方に放散されると共に銅合金
溶湯に対して溶解度の高いＣＯ2 ガスの一部は溶湯内へ
溶け込む。ここに不活性ガスを吹込むと、溶湯内に溶け
込んだＣＯ2 ガスは、溶湯内へ吹き込まれる不活性ガス
の気泡内へ分圧差によって捕集され、不活性ガスと共に
すみやかに溶湯表面に浮上する。そして浮上したＣＯ2
ガスは湯面上に赤熱状態で存在する固体還元剤によって
直ちに還元されてＣＯとなるが、ＣＯは銅または銅合金
溶湯に対する溶解度が小さいので、溶湯内へ溶け込むこ
となく上方に放散されることになり、還元を短時間で効
率良く進めることができる。このとき、ガス吹込みノズ
ルを溶湯中で回転させながら不活性ガスを吹込むと、吹
込まれた不活性ガスの気泡がノズルの回転によって生じ
る剪断力により微細化され、それに伴なう表面積の拡大
よってＣＯ2 の捕捉効果が高められ、還元を一層短時間
で効率良く進めることができる。尚銅または銅合金溶湯
は相対的に粘性が高く、回転数が小さ過ぎる場合はノズ
ルの回転に伴なって溶湯が回転方向に同伴流を生じ、剪
断による気泡微細化効果が有効に発揮されなくなる。That is, when a solid reducing agent such as charcoal is added to the surface of the molten metal, a reducing reaction takes place on the surface of the molten metal to produce gas such as CO 2 and CO, and a part of the gas is diffused upward and melted into the molten copper alloy. On the other hand, a part of highly soluble CO 2 gas dissolves into the molten metal. When an inert gas is blown into the molten metal, the CO 2 gas dissolved in the molten metal is captured by the partial pressure difference in the bubbles of the inert gas blown into the molten metal, and immediately floats on the surface of the molten metal together with the inert gas. . And the CO 2 that surfaced
The gas is immediately reduced to CO by a solid reducing agent existing in a red hot state on the surface of the molten metal, but since CO has a low solubility in the copper or copper alloy molten metal, it is diffused upward without melting into the molten metal. Therefore, the reduction can be efficiently advanced in a short time. At this time, if the inert gas is blown while rotating the gas blowing nozzle in the molten metal, the bubbles of the blown inert gas are atomized by the shearing force generated by the rotation of the nozzle, which increases the surface area. Therefore, the effect of capturing CO 2 is enhanced, and the reduction can be efficiently advanced in a shorter time. Note that the copper or copper alloy melt has a relatively high viscosity, and when the rotation speed is too small, the melt creates an entrained flow in the rotation direction as the nozzle rotates, and the bubble miniaturization effect due to shearing cannot be effectively exhibited. .
【００２５】しかし回転によるノズル開口部の周速度が
１２０ｍ／分以上、より好ましくは３００ｍ／分以上と
なる様に当該ノズルの回転数を設定してやれば、上記回
転による吹込みガス気泡の微細化効果が有効に発揮さ
れ、溶湯中の酸素量を短時間で規格レベル以下に低減す
ることができる。However, if the number of revolutions of the nozzle is set so that the peripheral velocity of the nozzle opening due to the rotation is 120 m / min or more, more preferably 300 m / min or more, the effect of atomizing the blown gas bubbles by the above rotation is obtained. Is effectively exhibited, and the amount of oxygen in the molten metal can be reduced to below the standard level in a short time.
【００２６】ちなみに図３は、除滓を終えた酸素濃度が
１００００ｐｐｍの銅合金溶湯を用い、該溶湯表面に固
体還元剤として木炭粉を溶湯重量に対し０．５％添加
し、回転式のガス吹込みノズルを用いて当該ノズルの回
転周速度を種々変えながらＡｒガスを吹込むことにより
還元を行なったときの、ノズル開口部の周速度と溶湯中
の酸素量の関係を調べた結果を示したものである。尚こ
のときの溶湯温度は１２００℃、Ａｒ吹込み量は４０Ｎ
リットル／分、処理時間は１０分とした。By the way, in FIG. 3, a copper alloy molten metal having an oxygen concentration of 10,000 ppm after slag removal is used, and charcoal powder as a solid reducing agent is added to the surface of the molten metal in an amount of 0.5% based on the weight of the molten metal. The results of investigating the relationship between the peripheral velocity of the nozzle opening and the amount of oxygen in the molten metal when performing reduction by blowing Ar gas while changing the peripheral velocity of the nozzle using the blowing nozzle are shown. It is a thing. At this time, the temperature of the molten metal was 1200 ° C, and the amount of Ar blown was 40N.
The liter / minute and the processing time were 10 minutes.
【００２７】図３からも明らかである様に、固体還元剤
と不活性ガスの吹込みを併用した場合でも、回転ノズル
の周速度によって還元速度は著しく異なり、ノズル開口
部の周速度が１２０ｍ／分未満では還元促進効果は殆ど
認められないが、周速度が３００ｍ／分以上になると還
元速度は急激に増大し、周速度が４００ｍ／分以上にな
ると僅か１０分という短い還元処理時間でも溶湯中の酸
素濃度を５００ｐｐｍ程度以下にまで低減することがで
きる。従って最終の還元工程（脱酸工程）では、上記の
様に溶湯に固体還元剤を添加すると共に、ノズル開口部
の周速度が１２０ｍ／分以上、より好ましくは３００ｍ
／分以上となる様にガス吹込みノズルを回転させながら
不活性ガスを吹込み、該ガスを微細な気泡として溶湯内
へ送給する方法を採用すれば、目標レベルまでの脱酸を
短い時間で行なうことができるので好ましい。As is clear from FIG. 3, even when the solid reducing agent and the inert gas are both blown in, the reduction speed remarkably differs depending on the peripheral speed of the rotary nozzle, and the peripheral speed of the nozzle opening is 120 m / If the peripheral speed is less than 300 m, there is almost no reduction promoting effect, but if the peripheral speed is 300 m / min or more, the reduction speed increases rapidly, and if the peripheral speed is 400 m / min or more, even in a short reduction treatment time of only 10 minutes The oxygen concentration of can be reduced to about 500 ppm or less. Therefore, in the final reduction step (deoxidation step), the solid reducing agent is added to the molten metal as described above, and the peripheral velocity of the nozzle opening is 120 m / min or more, more preferably 300 m.
If a method is adopted in which an inert gas is blown while rotating the gas blowing nozzle so that the flow rate is at least 1 minute / minute and the gas is fed as fine bubbles into the molten metal, deoxidation to the target level takes a short time. Is preferable because it can be carried out in.
【００２８】この場合、銅または銅合金溶湯は高温であ
り、回転ノズルに駆動源を直結すると溶湯からの伝熱に
よって駆動源が焼付きを起こす恐れがあるので、回転ノ
ズルと駆動源は断熱性素材を介して連結するか、あるい
は図４に示す様にベルト等を介して間接的に連続し、回
転駆動源との熱伝達を防止することが望まれる。In this case, the molten copper or copper alloy has a high temperature, and if the drive source is directly connected to the rotary nozzle, the drive source may be burned by the heat transfer from the melt, so the rotary nozzle and the drive source are adiabatic. It is desired to prevent the heat transfer from the rotary drive source by connecting them via a material or indirectly connecting them via a belt or the like as shown in FIG.
【００２９】例えば図４は、バッチ式還元処理装置を例
示する概略説明図であり、還元処理炉１の上方から不活
性ガス吹込みノズル２を垂下して溶湯Ｍｅ内に浸漬せし
め、該ノズル２を回転させながら不活性ガスを溶湯内へ
吹き込む。尚、該不活性ガスノズル２への不活性ガスの
供給は、該ノズルの付け根部へ自在継手５によって接合
された不活性ガス供給管４によって行なう。そして、不
活性ガス吹込みノズル２を冷却軸６およびプーリ８を介
してベルト９により回転駆動源１０に間接的に連結し、
溶湯Ｍｅの熱が回転駆動源１０に直接伝わらない様に工
夫している。For example, FIG. 4 is a schematic explanatory view illustrating a batch type reduction treatment apparatus, in which an inert gas blowing nozzle 2 is hung from above the reduction treatment furnace 1 and immersed in the molten metal Me, and the nozzle 2 Inert gas is blown into the molten metal while rotating. The inert gas is supplied to the inert gas nozzle 2 by the inert gas supply pipe 4 joined to the base of the nozzle by a universal joint 5. The inert gas blowing nozzle 2 is indirectly connected to the rotary drive source 10 by the belt 9 via the cooling shaft 6 and the pulley 8.
It is devised so that the heat of the molten metal Me is not directly transmitted to the rotary drive source 10.
【００３０】また、不活性ガス吹込みノズル２を高速で
回転させると、その回転によって溶湯Ｍｅが連れ回りを
起こし、吹込みガスの微細化効果が損なわれることがあ
る。ところが、図４に一点鎖線で示す如く処理炉１内に
邪魔板３を配置して溶湯Ｍｅの連れ回りを防止すれば、
吹込みガスの連れ回りが防止され、吹込みガスの微細化
効果を高めることができるので好ましい。Further, when the inert gas blowing nozzle 2 is rotated at a high speed, the rotation of the molten metal may cause the molten metal Me to rotate, and the effect of refining the blowing gas may be impaired. However, if the baffle plate 3 is arranged in the processing furnace 1 as shown by the one-dot chain line in FIG. 4 to prevent entrainment of the molten metal Me,
It is preferable that the blown gas is prevented from entraining and the effect of refining the blown gas can be enhanced.
【００３１】不活性ガス吹込みノズル２の先端構造も特
に限定されないが、例えば図５（ノズル２を下面側から
見た図）の様に、十字状に形成したノズル先端部材２ａ
の下面にスリット２ｂを形成し、該スリット２ｂに沿っ
て不活性ガスが吹込まれる様にすることも可能である。Although the tip structure of the inert gas blowing nozzle 2 is not particularly limited, the nozzle tip member 2a formed in a cross shape as shown in FIG.
It is also possible to form a slit 2b on the lower surface of and to allow an inert gas to be blown along the slit 2b.
【００３２】[0032]
【実施例】次に本発明の実施例を示すが、本発明はもと
より下記実施例によって制限を受けるものではない。表
１に示す銅屑もしくは銅合金屑を使用し、反射炉もしく
は誘導溶解炉を用いて溶融した後、空気または酸素を酸
素源として吹込むことによって酸化処理を行ない、表１
に示す酸素濃度に調整した。次いで該溶湯内へ所定量の
炭酸ソーダとＦｅ2 Ｏ3 を順次吹込んだ後、溶湯表面に
浮上した滓を除去し、このときの除滓率を下記の方法に
よって求めると共に、溶湯中のＳｂ，Ａｓ，Ｔｅ残存量
から各不純物元素の除去率を求め、表１に併記する結果
を得た。 （除滓率測定） 除滓率＝［（そのチャージで除去した除滓の重量）／
（そのチャージで生ずる滓の重量）］×１００（％）EXAMPLES Next, examples of the present invention will be shown, but the present invention is not limited by the following examples. After the copper scraps or copper alloy scraps shown in Table 1 were melted in a reverberatory furnace or an induction melting furnace, an oxidizing treatment was performed by blowing air or oxygen as an oxygen source.
The oxygen concentration was adjusted to that shown in. Then, a predetermined amount of sodium carbonate and Fe 2 O 3 were sequentially blown into the molten metal, the slag floating on the surface of the molten metal was removed, and the slag removal rate at this time was determined by the following method, and Sb in the molten metal was determined. , As, Te, the removal rate of each impurity element was determined from the remaining amount, and the results shown in Table 1 were obtained together. (Measurement of slag ratio) Scrap ratio = [(weight of slag removed by the charge) /
(Weight of slag generated by the charge)] x 100 (%)
【００３３】[0033]
【表１】 [Table 1]
【００３４】表１からも明らかである様に、本発明法に
よれば様々の銅屑もしくは銅合金屑からＳｂ，Ａｓ，Ｔ
ｅを効率よく除去できると共に、９５％以上の高い除滓
率が得られている。尚、表１では除滓剤としてＦｅ2 Ｏ
3 粉を用いた例を示したが、除滓剤としてＦｅあるいは
他のＦｅ酸化物、Ｍｎ，Ｍｎ酸化物を用いた場合も、ほ
ぼ同様の除滓率が得られることを確認している。除滓後
の各溶湯は、固体還元剤として木炭粉を用い、回転ノズ
ルを用い４００ｍ／分の周速度で該ノズルを回転させな
がらＡｒガス微細気泡として吹込んで還元を行なうこと
により、いずれも１０分の処理で残存酸素濃度を１００
ｐｐｍ以下に低減することができ、精製された高純度の
銅または銅合金として支障なく使用し得るものであっ
た。As is clear from Table 1, according to the method of the present invention, various copper scraps or copper alloy scraps are treated with Sb, As, T.
e can be efficiently removed, and a high slag removal rate of 95% or more is obtained. In Table 1, Fe 2 O was used as a slag remover.
Although an example using three powders is shown, it has been confirmed that substantially the same slag removal rate can be obtained when Fe or another Fe oxide, Mn, or Mn oxide is used as a slag removing agent. After removing the slag, charcoal powder was used as a solid reducing agent, and a rotary nozzle was blown as Ar gas fine bubbles while rotating the nozzle at a peripheral speed of 400 m / min to carry out reduction. The residual oxygen concentration is 100
It could be reduced to ppm or less and could be used as purified high-purity copper or copper alloy without any problem.
【００３５】[0035]
【発明の効果】本発明は以上の様に構成されており、特
に銅または銅合金中に含まれる不純物元素の中でも除去
しにくいＳｂ，Ａｓ，Ｔｅをアルカリ金属との複合酸化
物とすることによって容易に滓化させると共に、この滓
は、Ｆｅ（Ｍｎ）酸化物を加えることによって、溶湯と
の濡れ性が小さく且つ流動性の乏しい滓に変えて溶湯表
面から容易に除去することができ、上記不純物元素の除
去作業性及び除去効率を著しく高めることができる。そ
して除滓後還元処理に付して脱酸を行なうことによっ
て、高純度の再生銅または銅合金として有効に活用する
ことができる。The present invention is configured as described above, and in particular, by using Sb, As, and Te, which are difficult to remove among the impurity elements contained in copper or copper alloy, as a complex oxide with an alkali metal. The slag can be easily converted into a slag having a low wettability with the molten metal and a poor fluidity by adding Fe (Mn) oxide, and can be easily removed from the surface of the molten metal. It is possible to significantly improve the workability and the removal efficiency of the impurity element. Then, after the slag is removed and subjected to a reduction treatment for deoxidation, it can be effectively utilized as high-purity recycled copper or copper alloy.
【図１】酸化処理時における溶湯中の酸素濃度と該溶湯
中のＳｂ，ＡｓおよびＴｅ濃度の関係を示すグラフであ
る。FIG. 1 is a graph showing the relationship between oxygen concentration in molten metal and Sb, As and Te concentrations in the molten metal during oxidation treatment.
【図２】酸化処理後、炭酸ソーダを加えて複合酸化物と
することにより溶湯表面に浮上した滓を除去する際に、
除滓剤としてＦｅ2 Ｏ3 を添加した場合と添加しなかっ
た場合の除滓率を対比して示すグラフである。[FIG. 2] After removing the slag floating on the surface of the molten metal by adding sodium carbonate to form a composite oxide after the oxidation treatment,
It is a graph showing in comparison the skimming rate when not added with the case of adding Fe 2 O 3 as a skimming agent.
【図３】除滓後の還元処理時における不活性ガス吹込み
ノズルの開孔部の周速度を変えたときの残存酸素量の変
化を示すグラフである。FIG. 3 is a graph showing changes in the amount of residual oxygen when the peripheral velocity of the opening of the inert gas blowing nozzle is changed during the reduction treatment after slag removal.
【図４】還元処理装置を例示する概略説明図である。FIG. 4 is a schematic explanatory view illustrating a reduction processing device.
【図５】回転式不活性ガスノズルの構造を例示する説明
図である。FIG. 5 is an explanatory view illustrating the structure of a rotary inert gas nozzle.
１ 還元処理炉 ２ 不活性ガス吹込みノズル ３ 邪魔板 ４ 不活性ガス供給管 ５ 自在継手 ６ 冷却軸 ８ プーリ ９ ベルト １０ 回転駆動源 1 Reduction Treatment Furnace 2 Inert Gas Injection Nozzle 3 Baffle Plate 4 Inert Gas Supply Pipe 5 Universal Joint 6 Cooling Shaft 8 Pulley 9 Belt 10 Rotational Drive Source
───────────────────────────────────────────────────── フロントページの続き (72)発明者 新井 基浩 兵庫県神戸市西区高塚台１丁目５番５号 株式会社神戸製鋼所神戸総合技術研究所内 (72)発明者 益野 裕 愛知県名古屋市中村区名駅４丁目７−23 株式会社神戸製鋼所名古屋支社内 (72)発明者 池田 隆吉 山口県下関市長府港町14番１号 株式会社 神戸製鋼所長府製造所内 (72)発明者 吉田 栄次 山口県下関市長府港町14番１号 株式会社 神戸製鋼所長府製造所内 (72)発明者 岡田 裕文 山口県下関市長府港町14番１号 株式会社 神戸製鋼所長府製造所内 (72)発明者 浜中 龍介 山口県下関市長府港町14番１号 株式会社 神戸製鋼所長府製造所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Motohiro Arai 1-5-5 Takatsukadai, Nishi-ku, Kobe City, Hyogo Prefecture Kobe Steel Co., Ltd. Kobe Research Institute (72) Inventor Hiroshi Masuno Nakamura-ku, Nagoya, Aichi Prefecture Nagoya Station, Kobe Steel Works, Ltd., 4-7-23, Meiji Station (72) Inventor Takayoshi Ikeda 14-1 Chofu Minatomachi, Shimonoseki City, Yamaguchi Prefecture Inside the Chofu Works, Kobe Steel Works, Ltd. (72) Inventor Eiji Yoshida Shimonoseki, Yamaguchi Prefecture 14-1 Minatomachi, Mayufu Kobe Steel Co., Ltd.In the Chofu Works (72) Inventor Hirofumi Okada 14-1 Chofu Minatocho, Shimonoseki City, Yamaguchi Prefecture In the Chofu Works, Kobe Steel Co., Ltd. (72) Ryusuke Hamanaka Shimonoseki, Yamaguchi 14-1 Minato-cho, Mayor of the city Kobe Steel Co., Ltd.
Claims (3)
びＴｅの１種以上を含む銅または銅合金原料を用いて銅
または銅合金を溶製するに当たり、該銅または銅合金原
料の溶湯中に酸素源を供給して該溶湯中の酸素濃度を１
０００ｐｐｍ以上とし、アルカリ金属化合物を加えて上
記不純物元素の酸化物を捕捉し、次いでＦｅ，Ｆｅ酸化
物、ＭｎおよびＭｎ酸化物よりなる群から選択される少
なくとも１種を添加してから除滓した後、前記溶湯を還
元することを特徴とする銅または銅合金の溶製法。1. When melting copper or a copper alloy using a copper or copper alloy raw material containing at least one of Sb, As and Te as impurities, an oxygen source is added to the molten metal of the copper or copper alloy raw material. Supply the oxygen concentration in the melt to 1
000 ppm or more, an alkali metal compound was added to trap oxides of the above-mentioned impurity elements, and then at least one selected from the group consisting of Fe, Fe oxides, Mn and Mn oxides was added and then slag was removed. After that, the molten metal is reduced, and a method for melting copper or copper alloy.
た後、不活性ガスを溶湯内へ吹込むことにより還元を行
なう請求項１記載の溶製法。2. The melting process according to claim 1, wherein the solid reducing agent is added to the surface of the molten metal after the slag is removed, and then the reduction is performed by blowing an inert gas into the molten metal.
転によって生じる剪断力を利用して不活性ガスを微細な
気泡として溶湯内へ吹込む請求項２記載の溶製法。3. The melting method according to claim 2, wherein the gas blowing nozzle is rotated, and the shearing force generated by the rotation is used to blow the inert gas into the molten metal as fine bubbles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP537893A JP3203848B2 (en) | 1993-01-14 | 1993-01-14 | Melting method of copper or copper alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP537893A JP3203848B2 (en) | 1993-01-14 | 1993-01-14 | Melting method of copper or copper alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06212301A true JPH06212301A (en) | 1994-08-02 |
| JP3203848B2 JP3203848B2 (en) | 2001-08-27 |
Family
ID=11609511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP537893A Expired - Fee Related JP3203848B2 (en) | 1993-01-14 | 1993-01-14 | Melting method of copper or copper alloy |
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| Country | Link |
|---|---|
| JP (1) | JP3203848B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010280949A (en) * | 2009-06-04 | 2010-12-16 | Mitsubishi Materials Corp | Tin smelting method |
| JP2012201896A (en) * | 2011-03-23 | 2012-10-22 | Jx Nippon Mining & Metals Corp | Apparatus and method for treating copper containing iron and tin |
| JP2012201894A (en) * | 2011-03-23 | 2012-10-22 | Jx Nippon Mining & Metals Corp | Treatment method of copper containing iron and tin |
| CN114350975A (en) * | 2022-01-06 | 2022-04-15 | 高诺(衡阳)新材料有限责任公司 | Reverberatory furnace fire refining method for high-arsenic and high-antimony crude copper |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10112036A (en) | 1996-10-07 | 1998-04-28 | Hitachi Maxell Ltd | Recording and playback device |
-
1993
- 1993-01-14 JP JP537893A patent/JP3203848B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010280949A (en) * | 2009-06-04 | 2010-12-16 | Mitsubishi Materials Corp | Tin smelting method |
| JP2012201896A (en) * | 2011-03-23 | 2012-10-22 | Jx Nippon Mining & Metals Corp | Apparatus and method for treating copper containing iron and tin |
| JP2012201894A (en) * | 2011-03-23 | 2012-10-22 | Jx Nippon Mining & Metals Corp | Treatment method of copper containing iron and tin |
| CN114350975A (en) * | 2022-01-06 | 2022-04-15 | 高诺(衡阳)新材料有限责任公司 | Reverberatory furnace fire refining method for high-arsenic and high-antimony crude copper |
| CN114350975B (en) * | 2022-01-06 | 2022-09-02 | 高诺(衡阳)新材料有限责任公司 | Reverberatory furnace fire refining method for high-arsenic and high-antimony crude copper |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3203848B2 (en) | 2001-08-27 |
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