JP3006799B2 - Dissolution method of copper or copper alloy scrap - Google Patents
Dissolution method of copper or copper alloy scrapInfo
- Publication number
- JP3006799B2 JP3006799B2 JP24056390A JP24056390A JP3006799B2 JP 3006799 B2 JP3006799 B2 JP 3006799B2 JP 24056390 A JP24056390 A JP 24056390A JP 24056390 A JP24056390 A JP 24056390A JP 3006799 B2 JP3006799 B2 JP 3006799B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- copper
- oxide
- copper alloy
- ppm
- 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
- 239000010949 copper Substances 0.000 title claims description 32
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims description 30
- 229910052802 copper Inorganic materials 0.000 title claims description 29
- 229910000881 Cu alloy Inorganic materials 0.000 title claims description 28
- 238000011978 dissolution method Methods 0.000 title description 2
- 229910052751 metal Inorganic materials 0.000 claims description 49
- 239000002184 metal Substances 0.000 claims description 49
- 229910052718 tin Inorganic materials 0.000 claims description 20
- 229910052745 lead Inorganic materials 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 19
- 229910052742 iron Inorganic materials 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 18
- 230000008018 melting Effects 0.000 claims description 18
- 239000002893 slag Substances 0.000 claims description 12
- 239000012159 carrier gas Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 238000011946 reduction process Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- 238000007254 oxidation reaction Methods 0.000 description 12
- 230000003647 oxidation Effects 0.000 description 10
- 238000007664 blowing Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000000155 melt Substances 0.000 description 6
- 238000005188 flotation Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011135 tin Substances 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)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は銅または銅合金屑の溶解方法に関し、さらに
詳しくは、銅または銅合金の屑を効率よく回収すること
ができる銅または銅合金の溶解方法に関するものであ
る。Description: TECHNICAL FIELD The present invention relates to a method for melting copper or copper alloy scraps, and more particularly, to a method for efficiently collecting copper or copper alloy scraps. It relates to a dissolution method.
［従来技術］ 一般的に、銅および銅合金は、鉄、アルミニウムと同
程度に需要の大きい金属であり、加工後に発生する屑の
量も大であり、この大量の屑を回収して再利用すること
は資源保護の立場から重要なことである。[Prior Art] Generally, copper and copper alloys are metals that are in high demand as much as iron and aluminum, and the amount of waste generated after processing is large. This large amount of waste is collected and reused. It is important from a resource conservation standpoint.
現在における銅または銅合金屑のリサイクル工程は、
電気銅−屑−手選別−溶解−鋳造−塑性加工−製品の順
となっている。The current recycling process for copper or copper alloy scraps is
Electrolytic copper-scrap-hand sorting-melting-casting-plastic working-product.
発生した銅または銅合金屑の中で、極端に低品位な屑
は、所謂、“山送り”と称して、銅精錬所に戻され、湿
式処理（電気分解法他）により高純度化されて、再度電
気銅地金に再生される。また、品位の比較的に良い屑
は、手選別および磁選別により、異物、異種金属等の製
品の欠陥となる不良成分を極力除去した後、溶解原料の
一部または全部として使用するのである。Among the generated copper or copper alloy scrap, extremely low-grade scrap is returned to the copper smelter, so-called "mounting feed", and is purified by wet processing (electrolysis method etc.). , Will be recycled to copper bullion again. In addition, waste of relatively high quality is used as a part or the whole of the raw material after removing defective components such as foreign substances and dissimilar metals, which are defects of the product, by manual and magnetic separation as much as possible.
しかし、この方法には、種々の利点は存在するが、同
時に少なくとも以下説明する欠点が存在するものであ
り、改善が望まれている。However, although this method has various advantages, it also has at least the following disadvantages, and an improvement is desired.
１）手選別および磁選別は、主として人手に頼る手作業
であり、選別効率、処理能力等に問題があるばかりでな
く、近い将来、これら作業に従事する人手不足が考えら
れる。1) Manual selection and magnetic separation are manual operations mainly relying on humans. Not only are there problems in selection efficiency, processing capacity, and the like, but also a shortage of workers engaged in these operations is considered in the near future.
２）銅または銅合金に要求される不純物元素の濃度は、
最高100ppm以下であり、上記に説明した手選別および選
別を使用しても、屑配合率100％、或いは、100％に近い
値で規格を満足する原料として使用することができな
い。2) The concentration of the impurity element required for copper or copper alloy is
It is 100 ppm or less at the maximum, and even if the above-described manual sorting and sorting are used, it cannot be used as a raw material satisfying the standard with a scrap mixing ratio of 100% or a value close to 100%.
即ち、より効果的、能率的な不純物元素除去すること
ができる溶解方法の開発が強く望まれている。That is, there is a strong demand for the development of a dissolving method capable of more effectively and efficiently removing impurity elements.
［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
屑からPb、Sn、Fe等の不純物を除去する方法の問題点に
鑑み、本発明者が鋭意研究を行った結果、溶解原料の前
処理を行わずに、銅または銅合金屑の溶解に際して、不
純物として混入しているPb、Sn、Feを酸化物としてノロ
を生成させ、このノロの除滓を行う銅または銅合金屑の
溶解方法を開発したのである。[Problems to be Solved by the Invention] In view of the problems of the above-described conventional method for removing impurities such as Pb, Sn, and Fe from copper or copper alloy scraps, the present inventors have conducted intensive studies. As a result, without performing pretreatment of the molten raw material, when melting copper or copper alloy scraps, Pb, Sn, Fe mixed as impurities are generated as oxides to form slag, and copper for removing the slag is removed. Alternatively, a method for dissolving copper alloy scrap was developed.
［問題点を解決するための手段］ 本発明に係る銅または銅合金屑の溶解方法は、 （１）Pb、Sn、Feの１種以上を含有する銅または銅合金
屑を原料の一部或いは全部として使用して大気溶解を行
い、溶湯中の酸素濃度を3000〜30000ppmに調整して溶湯
中のPb、Sn、Feを酸化させた後、溶湯重量の10〜10000p
pmの酸化物をキャリヤーガスを使用して溶湯中に吹き込
み、Pb、Sn、Feの酸化物を含むノロを生成させ、このノ
ロを除滓した後、還元処理を行って鋳造することを特徴
とする銅または銅合金屑の溶解方法を第１の発明とし、 （２）Pb、Sn、Feの１種以上を含有する銅または銅合金
屑を原料の一部或いは全部として使用して大気溶解を行
い、溶湯中の酸素濃度を3000〜30000ppmに調整して溶湯
中のPb、Sn、Feを酸化させた後、溶湯を鎮静化すると共
に、ノロを除滓し、次いで、溶湯重量の10〜10000ppmの
酸化物をキャリヤーガスを使用して溶湯中に吹き込み、
Pb、Sn、Feの酸化物を含むノロを生成させ、このノロを
除滓した後、還元処理を行って鋳造することを特徴とす
る銅または銅合金屑の溶解方法を第２の発明とする２つ
の発明よりなるものである。[Means for Solving the Problems] The method for dissolving copper or copper alloy scrap according to the present invention includes the following steps: Used as a whole, dissolved in air, adjusted the oxygen concentration in the molten metal to 3,000 to 30,000 ppm to oxidize Pb, Sn, Fe in the molten metal, then 10 to 10,000 p of the weight of the molten metal
pm oxide is blown into the molten metal using a carrier gas to generate a nod containing an oxide of Pb, Sn, and Fe, and after removing the nod, a reduction treatment is performed and casting is performed. (2) Copper or copper alloy scrap containing at least one of Pb, Sn, and Fe is used as a part or all of the raw material to melt the atmosphere. After oxidizing Pb, Sn, and Fe in the molten metal by adjusting the oxygen concentration in the molten metal to 3,000 to 30,000 ppm, calming the molten metal, removing the slag, and then removing 10 to 10,000 ppm of the weight of the molten metal Is blown into the molten metal using a carrier gas,
The second invention is a method for dissolving copper or copper alloy scrap, characterized in that a slag containing oxides of Pb, Sn, and Fe is generated, the slag is removed, and a reduction treatment is performed to cast. It consists of two inventions.
本発明に係る銅または銅合金屑の溶解方法について、
以下詳細に説明する。About the melting method of copper or copper alloy scrap according to the present invention,
This will be described in detail below.
本発明に係る銅または銅合金屑の溶解方法において、
銅または銅合金製品の共通して問題となる元素は、Pb、
Sn、Feである。In the melting method of copper or copper alloy scrap according to the present invention,
Commonly problematic elements in copper or copper alloy products are Pb,
Sn and Fe.
このPb、Sn、Feの元素はの内で、Feは通常の溶解工程
において、溶湯中のO2濃度が100ppm前後で酸化するの
で、酸化物として比較的に容易に除去することができ
る。従って、問題となる元素はPb、Snである。Of these elements of Pb, Sn, and Fe, Fe is oxidized in the ordinary melting step when the O 2 concentration in the molten metal is around 100 ppm, so that it can be relatively easily removed as an oxide. Therefore, the problematic elements are Pb and Sn.
銅または銅合金にPbおよびSnの低融点金属が混入する
と、結晶粒界に析出、晶出し、加工割れ等の製品の欠陥
を生じると共に、熱伝導度、電気伝導度に悪影響をおよ
ぼすので好ましくない。If the low melting point metal of Pb and Sn is mixed into copper or copper alloy, it precipitates at crystal grain boundaries, crystallizes, and causes product defects such as processing cracks, as well as adversely affecting thermal conductivity and electrical conductivity. .
そして、PbおよびSnが混入する原因としては、ハンダ
等多数存在しており、上記に説明した選別法では充分な
除去を行うことは不可能であり、そのため、固体状態に
おける原料前処理法以外の方法として、溶解した後の液
体状態における一括処理を行うのである。And as a cause of contamination of Pb and Sn, there are many such as solder, and it is impossible to perform sufficient removal by the above-described sorting method, and therefore, other than the raw material pretreatment method in the solid state. As a method, batch processing in a liquid state after dissolution is performed.
しかして、Pbは熱力学的特性がCuと極めて類似してお
り、従来より行われて来ている単なる酸化によっては殆
ど除去できないことは知られている。It is known that Pb is very similar in thermodynamic properties to Cu and can hardly be removed by conventional simple oxidation.
また、Snは熱力学的特性としては、Cuより著しく酸化
し易いのにも拘わらず、誘導炉等において溶解、酸化処
理した場合、酸化物として除去し難いことを通常経験す
るところである。In addition, although Sn has a thermodynamic property that is much more easily oxidized than Cu, it is usually experienced that it is difficult to remove it as an oxide when dissolved and oxidized in an induction furnace or the like.
そこで、本発明に係る銅または銅合金屑の溶解方法に
おけるPb、Snの除去について以下説明する。Therefore, the removal of Pb and Sn in the method for melting copper or copper alloy waste according to the present invention will be described below.
Pbの除去 （１）通常の酸化条件、例えば、溶湯中の酸素濃度がタ
フピッチ銅レベル（O2:250〜350ppm）程度では酸化しな
いが、3000ppm以上になると酸化を開始する。即ち、酸
化反応に関し、酸素濃度依存性を示している。Removal of Pb (1) Oxidation does not occur under normal oxidation conditions, for example, when the oxygen concentration in the molten metal is about the tough pitch copper level (O 2 : 250 to 350 ppm), but starts to oxidize when it exceeds 3000 ppm. In other words, the oxidation reaction shows oxygen concentration dependency.
第１表に酸化処理における溶湯中のO2濃度とPb酸化状
況を示す。Shows the O 2 concentration and Pb oxide conditions during the melt in the oxidation process in Table 1.
この第１表における酸化条件は、Cu−XPb系合金を120
0℃の温度で溶解し、空気吹き込みにより溶湯中のO2量
を所定濃度に調整した後、溶湯中のPb酸化状況を測定し
た。The oxidation conditions in Table 1 are as follows.
After melting at a temperature of 0 ° C. and adjusting the amount of O 2 in the molten metal to a predetermined concentration by blowing air, the state of Pb oxidation in the molten metal was measured.
○：酸化有 ×：酸化無 第１表より、銅または銅合金中のPbの濃度が低くて
も、また、高くても溶湯中のO2農奴が3000ppm以上にな
ると酸化反応が開始されることがわかる。○: oxidizing Yes ×: the oxidation-free table 1, even at low concentrations of Pb copper or a copper alloy, also higher O 2 serf in the molten metal even if the oxidation reaction is initiated and becomes more 3000ppm I understand.
（２）酸化により生成したPb酸化物は、溶湯より比重が
小さく、比較的容易に溶湯表面に浮上して分離が可能と
なる。(2) The Pb oxide generated by oxidation has a lower specific gravity than the molten metal, and relatively easily floats on the surface of the molten metal to be separated.
第２表に酸化処理によるPb酸化物の浮上挙動を示して
ある。Table 2 shows the floating behavior of the Pb oxide by the oxidation treatment.
第２表における酸化処理条件は、Cu−1000ppmPb系合
金を1200℃の温度において溶解を行い、空気吹き込みに
より、溶湯中のO2濃度を調整した場合と、調整しない場
合とを作り、溶湯表面部および底面部（坩堝方式）より
サンプリングを行い、分析を行った。The oxidation treatment conditions in Table 2 were prepared by melting a Cu-1000 ppm Pb-based alloy at a temperature of 1200 ° C., adjusting the O 2 concentration in the molten metal by air blowing, and adjusting the O 2 concentration in the molten metal. And sampling was performed from the bottom part (crucible type) and analyzed.
第２表から酸化処理を行った溶湯は、溶湯表面にPd酸
化物が多量に形成されており、底面部にはその割合が極
端に少なく、また、酸化処理を行わなかった溶湯は溶湯
表面部にはPb酸化物の形成は少なく、底面部には多量に
存在していることがわかる。As shown in Table 2, the molten metal subjected to the oxidation treatment had a large amount of Pd oxide formed on the surface of the molten metal, and the ratio thereof was extremely small on the bottom surface. Shows that the formation of Pb oxide is small and that a large amount is present on the bottom surface.
（３）この浮上分離においては、他の酸化物粉体を添加
し、Pbの複合酸化物を形成させると、添加した酸化物の
寄与により、見かけ比重がより低下し、浮上分離が容易
となる。(3) In this flotation, if another oxide powder is added to form a composite oxide of Pb, the apparent specific gravity is further reduced due to the contribution of the added oxide, and flotation becomes easy. .
第３表にPb酸化物浮上分離への酸化物添加の寄与につ
いて示してある。Table 3 shows the contribution of the oxide addition to the Pb oxide flotation.
この第３表の条件は、Cu−1000ppm Pb系合金を1200
℃の温度で溶解を行い、空気吹き込みにより溶湯中のO2
濃度を5000ppmに調整後、硼砂を添加し、溶湯表面部お
よび底面部（坩堝方式）よりサンプリングを行い、分析
した。なお、この場合、空気をキャリヤーガスとして吹
き込んだ。また、不活性ガス（Ar、Ｎ）をキャリヤーガ
スとして使用した場合も、同様な傾向を示した。The conditions in Table 3 are as follows.
Melting at a temperature of ° C., and O 2 in the molten metal by blowing air
After adjusting the concentration to 5000 ppm, borax was added, and sampling was performed from the surface portion and the bottom portion (crucible system) of the molten metal and analyzed. In this case, air was blown as carrier gas. The same tendency was exhibited when an inert gas (Ar, N) was used as a carrier gas.
第３表から酸化物を添加した場合には、溶湯表面部に
多量のPb酸化物が浮上分離しており、底面部には少ない
が、酸化物無添加の場合には、溶湯表面部にはPb酸化物
の浮上分離は少なく、底面部において多くなっているこ
とがわかる。From Table 3, when the oxide was added, a large amount of Pb oxide floated and separated at the surface of the molten metal, and was small at the bottom, but when no oxide was added, the surface of the molten metal did not. It can be seen that the floating separation of the Pb oxide was small and increased at the bottom.
（４）これら浮上分離した酸化物は、溶湯表面で“ノロ
層”を形成し、機械的に炉外に除去することができる。(4) These floating separated oxides form a "slag layer" on the surface of the molten metal and can be mechanically removed from the furnace.
なお、酸化物の種類とその吹き込み量との関係につい
ては、その一具体例を第４表に示す。Table 4 shows one specific example of the relationship between the type of oxide and the amount of blowing.
即ち、酸化物吹き込み添加量は、溶湯重量の10〜1000
0ppmが良好な結果を示していることがわかる。That is, the amount of the oxide blown is 10 to 1000 times the weight of the molten metal.
It can be seen that 0 ppm shows good results.
この第４表の条件は、Cu−1000ppm Pb系合金を1200
℃の温度において溶解し、空気吹き込みにより溶湯中の
O2濃度を5000ppmに調整した後、空気をキャリヤーガス
として、各種酸化物を溶湯重量に対して、10〜15000ppm
吹き込んだ後、溶湯を分析した。The conditions in Table 4 are as follows.
Melted at a temperature of ℃ C
After adjusting the O 2 concentration 5000 ppm, the air as the carrier gas, the various oxides relative to the melt weight, 10～15000Ppm
After blowing, the melt was analyzed.
○：溶湯中のPb濃度100ppm以下 ×：溶湯中のPb濃度100ppm以上 Snの除去 （１）熱力学的には容易に酸化することを実験的に確認
した。：: Pb concentration in the molten metal of 100 ppm or less ×: Pb concentration in the molten metal of 100 ppm or more Removal of Sn (1) It was experimentally confirmed that it is easily oxidized thermodynamically.
しかし、溶湯の撹拌の有無により、Sn酸化物の浮上挙
動が異なることを知見し、この原因を調査したところ、
溶湯中において生成するSn酸化物は著しく微細（数μｍ
以下）であり、浮上に相当の時間を必要とし、溶湯との
分離が困難となることが分かった。However, it was found that the floating behavior of Sn oxide was different depending on whether or not the molten metal was stirred, and the cause was investigated.
The Sn oxide generated in the molten metal is extremely fine (several μm
It was found that a considerable amount of time was required for floating, and separation from the molten metal was difficult.
そのため、以下説明する対策を講じた。 Therefore, the following measures were taken.
１）溶湯を静止させ、浮上分離の促進を図る。例えば、
反射炉を利用する。1) The molten metal is kept still to promote flotation separation. For example,
Use a reverberatory furnace.
第５表にSn酸化物の浮上挙動におよぼす溶湯撹拌の影
響について示してある。Table 5 shows the effect of molten metal stirring on the floating behavior of Sn oxide.
条件は、Cu−1000ppmSn系合金を1200℃の温度におい
て溶解し、空気吹き込みを行って、溶湯中のO2濃度を50
00ppmに調整した後、サンプリングを行った。The conditions were as follows: a Cu-1000 ppm Sn-based alloy was melted at a temperature of 1200 ° C., and air was blown to reduce the O 2 concentration in the molten metal to 50%.
After adjusting to 00 ppm, sampling was performed.
この第５表から溶湯の撹拌を行った場合には、溶湯表
面部と底面部とのSn酸化物の量には変化がないが、溶湯
を撹拌することなく反射炉において静止した場合には、
Sn酸化物は溶湯表面部に多量に浮上していることがわか
る。From Table 5, when the molten metal was agitated, the amount of Sn oxide on the molten metal surface and bottom did not change, but when the molten metal was stopped in the reverberatory furnace without agitation,
It can be seen that a large amount of Sn oxide floated on the surface of the molten metal.
２）Pbの場合と同様に、他の酸化物粉体を添加して、浮
袋効果によりSn酸化物の浮上促進を図る。2) As in the case of Pb, another oxide powder is added to promote the floating of Sn oxide by the bladder effect.
第６表にSn酸化物浮上促進におよほす酸化物添加の効
果について示してある。Table 6 shows the effect of oxide addition on the promotion of Sn oxide floating.
条件は、Cu−1000ppmSn系合金を1200℃の温度で溶解
し、空気吹き込みにより溶湯中のO2濃度を5000ppmに調
整し、酸化物（SiO2・溶湯重量の300ppmを空気をキャリ
ヤーガスとして溶湯中に吹き込み）を吹き込み添加し
た。なお、溶解は1KHz高周波坩堝を使用した。The conditions were as follows: a Cu-1000 ppm Sn alloy was melted at a temperature of 1200 ° C, the O 2 concentration in the melt was adjusted to 5000 ppm by blowing air, and the oxide (SiO 2 · 300 ppm by weight of the melt was used as air as a carrier gas in the melt). Was added by blowing. In addition, 1 KHz high frequency crucible was used for melting.
第６表から酸化物吹き込み添加の効果は、Pbの場合と
同一の傾向を示した。From Table 6, the effect of the oxide blowing addition showed the same tendency as in the case of Pb.
［実 施 例］ 本発明に係る銅または銅合金の実施例を説明する。 [Example] An example of the copper or copper alloy according to the present invention will be described.
実施例 第７表に示す。Examples are shown in Table 7.
［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屑
の溶解方法は上記の構成を有しているから、銅また銅合
金屑に含まれているPb、Sn、Feを効率的、かつ、能率的
に銅または銅合金屑の溶解中においてノロとして除去す
ることができるという優れた効果を有しているものであ
る。 [Effects of the Invention] As described above, since the method for melting copper or copper alloy scrap according to the present invention has the above-described configuration, Pb, Sn, and Fe contained in copper or copper alloy scrap are removed. This has an excellent effect that it can be efficiently and efficiently removed as slag during melting of copper or copper alloy chips.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 進 克太郎 山口県下関市長府東侍町10―Ｂ―205 (72)発明者 坂本 敏正 山口県下関市長府川端町１―12―13 (72)発明者 吉田 栄次 山口県下関市長府黒門東町３―Ｆ―301 (72)発明者 山口 節夫 山口県下関市長府新松原町８―21 (72)発明者 浜中 龍介 山口県下関市長府黒門東町３―Ｆ―303 (72)発明者 竹内 忠義 兵庫県神戸市北区唐櫃台２丁目23―19 (72)発明者 大賀 清正 兵庫県神戸市須磨区神の谷６丁目３番 111―201 (72)発明者 中原 恒和 兵庫県高砂市曾根町宮ノ前2464―６ (56)参考文献 特開 昭61−3851（ＪＰ，Ａ) 特開 昭60−162737（ＪＰ，Ａ) 特開 昭61−217538（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Katsutaro Susumu 10-B-205, Nagasaki-cho, Shifuzeki City, Yamaguchi Prefecture Eiji, 3-F-301, Nagato Kuromon Higashicho, Shimonoseki City, Yamaguchi Prefecture (72) Inventor Setsuo Yamaguchi 8-21, Shinmatsubara-cho, Nagafu, Shimonoseki City, Yamaguchi Prefecture (72) Ryusuke Hamanaka 3-F-303, Nagafu Kuromon Higashi Town, Shimonoseki City, Yamaguchi Prefecture (72) Inventor Tadayoshi Takeuchi 2-23-19 Karatodai, Kita-ku, Kobe City, Hyogo Prefecture (72) Inventor Kiyomasa Oga 6-3-1, Kaminoya, Suma-ku, Kobe City, Hyogo Prefecture 111-201 (72) Inventor Tsunekazu Nakahara Hyogo Hyogo 2464-6, Miyano-mae, Sone-machi, Takasago-shi, Japan (56) References JP-A-61-3581 (JP, A) JP-A-60-162737 (JP, A) JP-A-61-217538 (JP, A)
Claims (2)
銅合金屑を原料の一部或いは全部として使用して大気溶
解を行い、溶湯中の酸素濃度を3000〜30000ppmに調整し
て溶湯中のPb、Sn、Feを酸化させた後、溶湯重量の10〜
10000ppmの酸化物をキャリヤーガスを使用して溶湯中に
吹き込み、Pb、Sn、Feの酸化物を含むノロを生成させ、
このノロを除滓した後、還元処理を行って鋳造すること
を特徴とする銅または銅合金屑の溶解方法。1. A method of melting copper or copper alloy scrap containing at least one of Pb, Sn, and Fe as a part or whole of a raw material to perform atmospheric melting, and adjusting an oxygen concentration in the molten metal to 3000 to 30000 ppm. After oxidizing Pb, Sn and Fe in the molten metal,
Using a carrier gas, 10000 ppm of oxide is blown into the molten metal to generate slag containing Pb, Sn, and Fe oxides.
A method for dissolving copper or copper alloy scrap, comprising removing the slag and subjecting it to a reduction treatment for casting.
銅合金屑を原料の一部或いは全部として使用して大気溶
解を行い、溶湯中の酸素濃度を3000〜30000ppmに調整し
て溶湯中のPb、Sn、Feを酸化させた後、溶湯を鎮静化す
ると共に、ノロを除滓し、次いで、溶湯重量の10〜1000
0ppmの酸化物をキャリヤーガスを使用して溶湯中に吹き
込み、Pb、Sn、Feの酸化物を含むノロを生成させ、この
ノロを除滓した後、還元処理を鋳造することを特徴とす
る銅または銅合金屑の溶解方法。2. A method of melting copper or copper alloy containing at least one of Pb, Sn, and Fe as a part or all of a raw material and performing atmospheric melting, and adjusting an oxygen concentration in the molten metal to 3000 to 30000 ppm. After oxidizing Pb, Sn, and Fe in the molten metal, the molten metal is calmed down, the slag is removed, and then the weight of the molten metal is 10 to 1000.
0 ppm oxide is blown into the molten metal using a carrier gas to generate a slag containing oxides of Pb, Sn and Fe, and after removing the slag, a copper reduction process is performed. Or a method of melting copper alloy scraps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24056390A JP3006799B2 (en) | 1990-09-11 | 1990-09-11 | Dissolution method of copper or copper alloy scrap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24056390A JP3006799B2 (en) | 1990-09-11 | 1990-09-11 | Dissolution method of copper or copper alloy scrap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04120222A JPH04120222A (en) | 1992-04-21 |
| JP3006799B2 true JP3006799B2 (en) | 2000-02-07 |
Family
ID=17061390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24056390A Expired - Fee Related JP3006799B2 (en) | 1990-09-11 | 1990-09-11 | Dissolution method of copper or copper alloy scrap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3006799B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5373422B2 (en) * | 2009-02-09 | 2013-12-18 | Ｄｏｗａメタルテック株式会社 | Copper alloy casting method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60162737A (en) * | 1984-02-03 | 1985-08-24 | Nippon Steel Corp | Refining method of blister copper |
| JPS613851A (en) * | 1984-06-19 | 1986-01-09 | Mitsui Mining & Smelting Co Ltd | Method for removing impurity from molten copper in ladle with alkali flux |
| JPS61217538A (en) * | 1985-03-25 | 1986-09-27 | Furukawa Electric Co Ltd:The | Method for continuously melting and casting copper |
-
1990
- 1990-09-11 JP JP24056390A patent/JP3006799B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04120222A (en) | 1992-04-21 |
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