WO1994003652A1 - Method of making metal of high purity from scrap of worked metal - Google Patents
Method of making metal of high purity from scrap of worked metal Download PDFInfo
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- WO1994003652A1 WO1994003652A1 PCT/JP1992/000982 JP9200982W WO9403652A1 WO 1994003652 A1 WO1994003652 A1 WO 1994003652A1 JP 9200982 W JP9200982 W JP 9200982W WO 9403652 A1 WO9403652 A1 WO 9403652A1
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- iron
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
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- 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
Definitions
- the present invention is a technology for producing high-purity metal, which has been increasingly valued in recent years, from industrial waste and aged metal waste generated during metal processing, which are social issues. This will promote the recycling of waste metal materials, solve social problems, and provide world-class technological advancements by supplying high-quality metals at a lower price than ever before to a wide range of technical fields. It is an invention suitable for the contribution of Background art
- the conventional waste iron was pressed together to produce solid waste iron, which was then melted in a furnace and re-manufactured. In addition, it completely oxidizes waste iron and is used for coloring Bengala paint and glass (red glass) from Fe 2 O 3 powder.
- Bengala paint and glass red glass
- the present invention has a completely different idea from the conventional recycling technology, and uses the techniques of metal corrosion and electric plating to “dissolve waste iron in an acid solution to make an electrolytic bath. To separate and collect iron with high purity by electrolysis.
- Japanese Patent Publication No. 03-53394, etc. which produces electrolytic iron of high purity by an electrolysis method.
- the starting iron is fundamentally different in that it does not use waste iron as in the present invention.
- Japanese Patent Application Laid-Open No. 58-189400 discloses a method for supplying iron ions by dissolving iron powder in an acid solution to supply iron plating.
- the major differences from the present invention are that they do not start from polished iron powder to which processing oil has adhered and swarf iron chips from waste iron, and because they extract ferrous chloride. The point is to manufacture an electrolytic bath that supplies ferrous ions.
- an object of the present invention is to provide a unique separation technique from waste iron containing various impurities that have no value other than that which has been discarded until now, and to produce highly useful high-purity iron. Thus, it can be applied to other metals besides iron in the same way, leading to the promotion of recycling technology. Disclosure of the invention
- An advantage of the present invention is that the conventional high-purity metal is manufactured using high-quality (high-purity metal) as a raw material, and thus is low in price.
- high-purity metal high-quality metal
- the price is high and there is a problem in mass production.
- the present invention can be provided at a low price for the above-described reason, and thus is expected to greatly contribute to the development of advanced technologies and products based on high-purity metals.
- FIG. 1 shows an electrolyzer used in the present invention.
- Reference numeral 1 denotes a titanium basket serving as an anode, into which chips and solid iron swarf, which are used to replenish the raw materials for electrolysis, are placed.
- Reference numeral 2 denotes a stainless steel cathode for depositing high-purity iron.
- the defatted powder type and flake type dissolve in saturated hydrochloric acid (sulfuric acid may be used) heated to 50-60 ° C in order to use the principle of solubility product in (1) in order to dissolve the iron quickly. Make a solution.
- the solution is filtered through a filtration device.
- Ferrous chloride (or ferrous sulfate), which is the main component of the electrolytic bath, is manufactured by cooling the saturated solution of (2) using the principle of solubility product.
- Electrolysis The electrolysis for obtaining the target electrolytic iron is performed in the apparatus shown in FIG. As the electrolysis proceeds, trivalent iron ions, which are harmful to electrolytic iron formation, are generated by air oxidation and anodic oxidation of useful iron ions in the electrolytic bath. In addition, the amount of divalent iron ions decreases, and the rate of electrolytic iron generation decreases.
- the solid iron scrap is put into one anode basket and electrolyzed. This solid iron scrap gradually dissolves into the bath and suppresses the replenishment and oxidation of ferrous ions.
- the anode basket is covered with a cloth as shown in 3 to prevent carbon etc. contained in the iron scraps from being mixed into the bath to form slag.
- stainless steel is placed between the anode baskets on both sides so that electrolytic iron can be deposited on both sides.
- the present invention that produces high-purity metals of use value and promotes recycling is an epoch-making.
- the present invention which produces highly valuable iron from scrap iron that has been thrown away in the past, will save global resources and will become even more important in the future. Since the technology of the present invention is to extract all kinds of metals with high purity, rare metals can be easily separated and collected from various discarded alloys and re-used as pure metals. It is an invention that can be used.
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- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
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- Organic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
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- Electrolytic Production Of Metals (AREA)
Abstract
A technology of recycling metals based on theories of corrosion and electroplating, for effectively utilizing scraps of metals, mainly iron, which poses social problems. All the three types (powdery, thin slide, and solid types) of metal scraps are treated at the same time only by the method of this invention to be recycled to highly value-added products, in which metal scraps are dissolved in acid solution and subjected to electrolysis so as to be recycled as metals of high purity. In this way, discarded scraps of metals are effectively utilized again, whereby recycling thereof is promoted.
Description
明 細 書 金属加工の廃材から高純度金属の製造法 技術分野 Description Manufacturing method of high-purity metal from waste metal processing
この発明は、 社会的問題である金属加工時に排出される産業廃棄物及び 老朽化した金属廃材から、 近年ますます価値の高まって いる高純度金属を 生成する技術である。 これは金属廃材の リサイ クルを促進する事にな り、 社会的問題を解消する と共に、 従来よ り 低価格で高品質金属を広範囲の 技術分野に供給する事によ り、 世界の技術進歩への貢献に適した発明であ る。 背景技術 The present invention is a technology for producing high-purity metal, which has been increasingly valued in recent years, from industrial waste and aged metal waste generated during metal processing, which are social issues. This will promote the recycling of waste metal materials, solve social problems, and provide world-class technological advancements by supplying high-quality metals at a lower price than ever before to a wide range of technical fields. It is an invention suitable for the contribution of Background art
多方面に活用されている金属のう ち、 90 %以上占める と言われてい る鉄 に関してのみ例をあげ説明する と、 機械加工を続ける限り鉄屑の廃棄物が 発生し、 更に老朽化した機械、 建築物から も際限な く 発生して く る。 これ に対し、 近年リ サイ クル法が制定され、 資源の再利用に 目を向け られて き ている力 屑鉄価格の下落によ り、 リサイ クル業者によ る廃棄鉄の再利用 がますます困難となっ て きて いる。 企業に於いて も、 廃棄鉄の処理費が増 加し、 大き な問題にもなつて きている。 Of the metals used in various fields, only iron, which is said to account for more than 90%, will be explained as an example.As long as machining continues, iron scrap will be generated, and even older machines It is also generated endlessly from buildings. On the other hand, the recycling law has been enacted in recent years, and the focus has been on resource recycling. Declining iron scrap prices make it increasingly difficult for recycling companies to recycle waste iron. It has become. Businesses are also increasing the cost of treating waste iron, which has become a major problem.
そんな中で、 従来の廃棄鉄はま とめてプ レス し、 廃棄鉄の固形物を作り、 炉で溶融して再製鉄を行って いた。 更に、 廃棄鉄を完全に酸化させ、 F e 2 O 3粉からベンガラ塗料やガラ スの着色 （赤ガラ ス ） に利用 されてい る。 これも、 近年鉄鋼材に種々の金属を添加した鉄合金が増え、 種類、 量、 コ ス ト等から対応し きれない現象が生じ、 年々、 リ サイ ク ルが難し く な つ て きて いる。 以上のこ とから従来技術のみでは社会ニーズ、 採算性、 処理量 等の点で、 難点が多かつ た。
このよ うな技術背景の中で本発明は、 従来の リサイ クル技術と全く 発想 が異な り、 金属の腐食理論、 電気メ ツキの技術を応用 して、 「廃棄鉄を酸 液に溶かして電解浴を作り、 電気分解法で髙純度の鉄を分離、 採集する 」 ものである。 Under such circumstances, the conventional waste iron was pressed together to produce solid waste iron, which was then melted in a furnace and re-manufactured. In addition, it completely oxidizes waste iron and is used for coloring Bengala paint and glass (red glass) from Fe 2 O 3 powder. Again, in recent years, the number of iron alloys in which various metals have been added to steel materials has increased, and phenomena that cannot be handled depending on the type, amount, cost, etc. have occurred, making recycling difficult every year. . From the above, the conventional technology alone had many difficulties in terms of social needs, profitability, throughput, etc. In this technical background, the present invention has a completely different idea from the conventional recycling technology, and uses the techniques of metal corrosion and electric plating to “dissolve waste iron in an acid solution to make an electrolytic bath. To separate and collect iron with high purity by electrolysis. "
この発明に関連する技術と して、 日本特公平 03 -533 94号等があ り、 電気 分解法によ り、 高純度な電解鉄を製造しているものがあるが、 電気分解の 材料となる鉄は当発明のよ う に廃棄鉄を利用 していない点で出発が根本的 に異なっている。 また、 電解浴の製造技術と して、 日本特開昭 58- 189400号 において、 鉄粉を酸液に溶かして、 鉄メ ツ キのための鉄イオン供給法を公 開 している。 後の項で詳説するが、 本発明と大き く 異なるのは、 加工油の 付着した研磨カス鉄粉、 切粉鉄屑の廃棄鉄からのスター トでない点、 また 塩化第一鉄を抽出するのでな く 第一鉄イオンを供給する電解浴を製造する 点である。 As a technology related to the present invention, there is Japanese Patent Publication No. 03-53394, etc., which produces electrolytic iron of high purity by an electrolysis method. The starting iron is fundamentally different in that it does not use waste iron as in the present invention. As a production technique of an electrolytic bath, Japanese Patent Application Laid-Open No. 58-189400 discloses a method for supplying iron ions by dissolving iron powder in an acid solution to supply iron plating. As will be described in detail in later sections, the major differences from the present invention are that they do not start from polished iron powder to which processing oil has adhered and swarf iron chips from waste iron, and because they extract ferrous chloride. The point is to manufacture an electrolytic bath that supplies ferrous ions.
従って、 本発明は今まで廃棄される以外価値のなかっ た種々の不純物を 含んでいた廃棄鉄から、 固有の分離技術を提供して、 非常に有用な高純度 の鉄を製造する事を目的と して、 他の鉄以外の金属にも同様に応用でき、 リサイ クル技術の促進につながる ものである。 発明の開示 Accordingly, an object of the present invention is to provide a unique separation technique from waste iron containing various impurities that have no value other than that which has been discarded until now, and to produce highly useful high-purity iron. Thus, it can be applied to other metals besides iron in the same way, leading to the promotion of recycling technology. Disclosure of the invention
本発明は、 リサイ クル困難となって き た産業廃棄物を原料と して酸液に 溶解し、 溶解度積の原理から電解浴の主成分を作る。 最終的にこの電解浴 中に於いて、 第 2 図に示したよ う な電解装置、 表 1 に示した電解条件で電 気分解を して、 高純度な金属を作るものである。 本発明の概略説明を第 1 図のフローチャー ト に示す。 According to the present invention, industrial waste, which has become difficult to recycle, is dissolved in an acid solution as a raw material, and the main component of the electrolytic bath is made from the principle of the solubility product. Finally, in this electrolytic bath, an electrolytic device as shown in Fig. 2 is electrolyzed under the electrolytic conditions shown in Table 1 to produce a high-purity metal. A schematic description of the present invention is shown in the flowchart of FIG.
従来の発明 と違い本発明が効果的な点と して、 従来の髙純度金属は原料 に質の良い （純度の高い金属） を用いて製造しているので髙価格である。 用途と しては研究用ベースメ タル、 特殊合金原料、 他各種研究開発用等々 に非常にニーズが高いが、 高価格でもあ り量産化には問題がある。
これに対し、 本発明では上記の理由によ り 低価格で提供でき るので、 高 純度金属をベースに した高度技術及び製品開発に大き く 貢献でき る と考え られる。 図面の簡単な説明 An advantage of the present invention, unlike the conventional invention, is that the conventional high-purity metal is manufactured using high-quality (high-purity metal) as a raw material, and thus is low in price. There are very high demands for applications such as base metal for research, raw materials for special alloys, and various other purposes for research and development. However, the price is high and there is a problem in mass production. On the other hand, the present invention can be provided at a low price for the above-described reason, and thus is expected to greatly contribute to the development of advanced technologies and products based on high-purity metals. BRIEF DESCRIPTION OF THE FIGURES
第 1 図はこの発明で用い られる電気分解装置である。 1 は陽極となるチ タ ン製バスケッ 卜で、 電気分解の原料の補充となる切粉や固形鉄屑を入れ る。 2 は髙純度の鉄を析出させる ス テ ン レスの陰極である。 FIG. 1 shows an electrolyzer used in the present invention. Reference numeral 1 denotes a titanium basket serving as an anode, into which chips and solid iron swarf, which are used to replenish the raw materials for electrolysis, are placed. Reference numeral 2 denotes a stainless steel cathode for depositing high-purity iron.
発明を実施するための最良の形態 BEST MODE FOR CARRYING OUT THE INVENTION
本発明の具体例と して、 砥石カス鉄粉、 切粉鉄屑から髙純度電解鉄の採 集方法について、 第 1 図フローチャー ト よ り説明する。 As a specific example of the present invention, a method for collecting high-purity electrolytic iron from grindstone iron powder and swarf iron chips will be described with reference to the flowchart of FIG.
① 脱脂 ① Degreasing
電気分解法を用いて陰極に金属を析出する際、 油の汚れを嫌うので、 予 め原料の廃棄鉄である研磨カス鉄粉 （粉末タイプ） 、 き り こ （薄片タイ プ） 、 固形鉄屑 （ブロ ッ クタ イプ） の 3 つのタイプのアルカ リ脱脂、 ま たはァセ 卜 ン洗浄を行う。 When depositing metal on the cathode using the electrolysis method, oil stains are disliked, so polished scrap iron powder (powder type), kiriko (flake type), solid iron shavings, which are waste iron of the raw material in advance 3 types of alkaline degreasing (blocker type) or washing with acetone.
② 酸液によ る化学分解 ② Chemical decomposition by acid solution
脱脂された粉末タイプと薄片タ イプのはいきてつを速く 溶解させる こ と と④において溶解度積の原理を用いるために、 50〜 60 °Cに加熱した塩酸 (硫酸でも良い ） に溶解、 飽和溶液を作る。 The defatted powder type and flake type dissolve in saturated hydrochloric acid (sulfuric acid may be used) heated to 50-60 ° C in order to use the principle of solubility product in (1) in order to dissolve the iron quickly. Make a solution.
③ ろ過 ③ Filtration
酸液に溶解しない炭素、 珪素などの不純物を除去するため、 ろ過装置に 通して ろ過、 次の④で純度の高い鉄塩を作れるよ う にする。 In order to remove impurities such as carbon and silicon that do not dissolve in the acid solution, the solution is filtered through a filtration device.
④ 電解浴主成分製造 製造 Main production of electrolytic bath
電解浴の主成分となる塩化第 1 鉄 （硫酸第 1 鉄でも良い ） を溶解度積の 原理を用い、 ②の飽和溶液を冷却して製造する。 Ferrous chloride (or ferrous sulfate), which is the main component of the electrolytic bath, is manufactured by cooling the saturated solution of (2) using the principle of solubility product.
⑤ 電気分解
目的とする電解鉄を得る ための電気分解は、 第 2 図に示す装置に於いて 行う。 電気分解を進めてい く と、 電解浴中の有用な 2 «鉄イオンが空気 酸化や陽極酸化によ り、 電解鉄生成に有害な 3価の鉄イオ ンが生成され る。 また、 2 価の鉄イオンが減少して電解鉄生成速度が遅く なる。 この 欠点を改善するためとブロッ クタイプの固形鉄屑を リサイ クルするよ う に、 1 つの陽極バスケッ 卜の中へこの固形鉄屑を入れ電気分解を行う。 この固形鉄屑は徐々 に浴中に溶け込み 2価鉄イオンの補給と酸化を抑え る。 この際鉄屑に含まれる炭素等が、 浴中に混ざり込んでスラグになら ないよ う に、 3 のごと く 陽極バスケッ トを布でカバーしている。 陰極は ステ ン レス材を両側陽極バスケッ トの間に配置して、 両面に電解鉄が析 出でき るよ う に している。 ⑤ Electrolysis The electrolysis for obtaining the target electrolytic iron is performed in the apparatus shown in FIG. As the electrolysis proceeds, trivalent iron ions, which are harmful to electrolytic iron formation, are generated by air oxidation and anodic oxidation of useful iron ions in the electrolytic bath. In addition, the amount of divalent iron ions decreases, and the rate of electrolytic iron generation decreases. In order to remedy this drawback and to recycle block-type solid iron scrap, the solid iron scrap is put into one anode basket and electrolyzed. This solid iron scrap gradually dissolves into the bath and suppresses the replenishment and oxidation of ferrous ions. At this time, the anode basket is covered with a cloth as shown in 3 to prevent carbon etc. contained in the iron scraps from being mixed into the bath to form slag. For the cathode, stainless steel is placed between the anode baskets on both sides so that electrolytic iron can be deposited on both sides.
以上の装置を用い、 第 1 表 第 1 表 Table 1 Table 1
に示す条件で電気分解を実施 Perform electrolysis under the conditions shown in
するこ とによ り、 高純度の電 By doing so, high-purity electricity
解鉄が得られる。 Iron can be obtained.
⑥、 ⑦ 水洗 乾燥⑥, ⑦ Rinse and dry
得た電解鉄が銪びないよ う に、 ⑥ 電解 so that the obtained electrolytic iron does not
⑦を行って、 目的とする髙純度の電解鉄の製造を終了する, ⑦ to end the production of the desired purity of electrolytic iron,
産業上の利用可能性 Industrial applicability
以上から本発明によ って、 次の 3 つの効果があげられるであろ う。 As described above, according to the present invention, the following three effects can be obtained.
1 リサイ クル法制定にも関わらず、 鉄屑及び金属の不再利用は大きな社 会問題である。 1 Despite the establishment of the recycling law, non-reuse of iron scrap and metal is a major social problem.
この リサイ クルが困難な社会状況の中で、 利用価値の髙ぃ髙純度金属 を製造し、 リサイ クルを促進する本発明は画期的である と言える。 In a social situation where recycling is difficult, the present invention that produces high-purity metals of use value and promotes recycling is an epoch-making.
ま た、 従来捨てていた鉄屑から非常に価値の高い鉄を作り 出す本発明 は、 地球規模の資源の節約につながり、 今後ますます重要な事になって く るであろ う。
本発明の技術は、 あらゆる種類の金属を高純度に して取り 出すもので あるから、 種々の廃棄される合金からも容易に希有な金属も分離、 採集 して、 髙純度金属と して再利用でき る発明である。 Also, the present invention, which produces highly valuable iron from scrap iron that has been thrown away in the past, will save global resources and will become even more important in the future. Since the technology of the present invention is to extract all kinds of metals with high purity, rare metals can be easily separated and collected from various discarded alloys and re-used as pure metals. It is an invention that can be used.
今まで捨てていた鉄屑を原料と しているから、 低 β格で高純度鉄が製 造でき、 高純度時代の研究用材料や製品にも安価で提供が可能で、 高度 技術の研究に貢献でき る と思われる。 また、 髙純度鉄を利用 した製品開 発に大き く 拍車をかけるであろ う。
Since iron scraps that have been discarded are used as raw materials, low-β grade, high-purity iron can be manufactured, and materials and products for research in the high-purity era can be provided at low cost, making it possible to research advanced technologies. I think it can contribute. It will also greatly accelerate the development of products using pure iron.
Claims
1 . あ らゆるタイプ （粉末、 薄片、 固形状） の廃材となっ た金属を、 本発 明で示す 1 つの製造方法で同時に処理でき るもので、 電解浴を製造し、 陽 極のバスケッ ト内にも廃材の金属を充填させ、 電気分解を実施して、 廃材 金属からその中の含有金属をそれぞれ高純度に分離、 製造する方法で、 リ サイ クルによる資源の有効活用である。
1. All types (powder, flakes, solids) of waste metal can be processed simultaneously by one manufacturing method shown in the present invention. Electrolytic baths are manufactured and anode baskets are manufactured. This is a method in which waste metal is filled inside, electrolysis is performed, and the metals contained in the waste metal are separated and manufactured with high purity. This is an effective use of resources by recycling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP1992/000982 WO1994003652A1 (en) | 1992-07-31 | 1992-07-31 | Method of making metal of high purity from scrap of worked metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP1992/000982 WO1994003652A1 (en) | 1992-07-31 | 1992-07-31 | Method of making metal of high purity from scrap of worked metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1994003652A1 true WO1994003652A1 (en) | 1994-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1992/000982 WO1994003652A1 (en) | 1992-07-31 | 1992-07-31 | Method of making metal of high purity from scrap of worked metal |
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| Country | Link |
|---|---|
| WO (1) | WO1994003652A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6388127B1 (en) | 1999-03-30 | 2002-05-14 | Pfizer Inc | Process for preparing cyclic thioamides |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS491404A (en) * | 1972-04-25 | 1974-01-08 | ||
| JPS5328156B2 (en) * | 1974-05-29 | 1978-08-12 | ||
| JPS625233B2 (en) * | 1983-06-23 | 1987-02-03 | Sumitomo Metal Mining Co |
-
1992
- 1992-07-31 WO PCT/JP1992/000982 patent/WO1994003652A1/en active Search and Examination
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS491404A (en) * | 1972-04-25 | 1974-01-08 | ||
| JPS5328156B2 (en) * | 1974-05-29 | 1978-08-12 | ||
| JPS625233B2 (en) * | 1983-06-23 | 1987-02-03 | Sumitomo Metal Mining Co |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6388127B1 (en) | 1999-03-30 | 2002-05-14 | Pfizer Inc | Process for preparing cyclic thioamides |
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