JP4911668B2 - Permanent cathode, electrolytic copper anode for producing electrolytic copper powder obtained by the cathode, and method for producing electrolytic copper powder - Google Patents
Permanent cathode, electrolytic copper anode for producing electrolytic copper powder obtained by the cathode, and method for producing electrolytic copper powder Download PDFInfo
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- JP4911668B2 JP4911668B2 JP2005353346A JP2005353346A JP4911668B2 JP 4911668 B2 JP4911668 B2 JP 4911668B2 JP 2005353346 A JP2005353346 A JP 2005353346A JP 2005353346 A JP2005353346 A JP 2005353346A JP 4911668 B2 JP4911668 B2 JP 4911668B2
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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
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Description
本発明は、電解銅粉の製造に用いられるアノード用電気銅を製造するのに好適なパーマネントカソード、該カソードにより得られる電解銅粉製造に用いられるアノード用電気銅、及び該アノード用電気銅を用いた電解銅粉製造方法に関する。 The present invention relates to a permanent cathode suitable for producing electrolytic copper for an anode used for producing electrolytic copper powder, electrolytic copper for anode used for producing electrolytic copper powder obtained by the cathode, and electrolytic copper for anode. It is related with the used electrolytic copper powder manufacturing method.
従来、電解銅粉は、銅電解精製により得られる電気銅をアノードとして用いて、電解精製、もしくは採取により製造されるのが一般的である。近年、銅電解精製における種板製造を廃止でき、かつ電気銅の生産効率や品質安定化を向上させる技術として、パーマネントカソード 法と呼ばれる、カソード板としてＳＵＳ板を使用し、この極板上に電気銅を析出させる電解法が汎用化されつつある。 Conventionally, electrolytic copper powder is generally manufactured by electrolytic purification or collection using electrolytic copper obtained by copper electrolytic purification as an anode. In recent years, the production of seed plates in copper electrolytic refining has been abolished, and as a technology to improve the production efficiency and quality stabilization of electrolytic copper, a SUS plate is used as the cathode plate, which is called the permanent cathode method. Electrolytic methods for depositing copper are becoming widely used.
このパーマネントカソード法によれば、従来のような、懸吊用のリボンを有す種板、ならびに種板に電気銅を析出させた析離電気銅は、得られなくなる。一方、電解銅粉は、前述したように、もしくは電解採取により製造されるが、リボンを有す析離電気銅のリボン部にブスバー（棹銅）を差込み、アノードとして用い、電解が行われる。従って、パーマネントカソード法により得られた電気銅では、電解銅粉製造用のアノードとしてそのまま使用することが出来ない。 According to this permanent cathode method, it is impossible to obtain a seed plate having a hanging ribbon and a segregated electrolytic copper in which electrolytic copper is deposited on the seed plate as in the prior art. On the other hand, the electrolytic copper powder is manufactured as described above or by electrowinning, and a bus bar is inserted into the ribbon portion of the electrodeposited electrodeposited copper having a ribbon, and electrolysis is performed using it as an anode. Therefore, electrolytic copper obtained by the permanent cathode method cannot be used as it is as an anode for producing electrolytic copper powder.
以上のことから、パーマネントカソード法変換により得られる、リボン等の吊手なし電気銅を用いて、効率良く、かつコスト的にも優れた電解銅粉を製造するためには、電解銅粉製造に用いられるアノード用電気銅として適切な形態を取る必要がある。 From the above, in order to produce electrolytic copper powder that is efficient and excellent in cost, using electrolytic copper without a handle such as a ribbon obtained by permanent cathode method conversion, it is necessary to manufacture electrolytic copper powder. It is necessary to take an appropriate form as the electrolytic copper used for the anode.
従って、本発明の目的は、上述の電解銅粉製造に用いられるアノード用電気銅を製造するのに好適なパーマネントカソード、該カソードにより得られる電解銅粉製造に用いられるアノード用電気銅、及び該アノード用電気銅を用いた電解銅粉製造方法を提供することにある。 Accordingly, an object of the present invention is to provide a permanent cathode suitable for producing the electrolytic copper for anode used in the production of the above-described electrolytic copper powder, the electrolytic copper for anode used in producing electrolytic copper powder obtained by the cathode, and the An object of the present invention is to provide a method for producing electrolytic copper powder using electrolytic copper for anode.
パーマネントカソード法の採用により、従来の、種板に電気銅を析出させた析離電気銅のリボンの代わりとなる吊手様の形態が、電解銅粉製造に用いられるアノード用電気銅とブスバー間に必要となる。 By adopting the permanent cathode method, the form of a handle that replaces the conventional copper electrodeposited ribbon with electrolytic copper deposited on the seed plate is between the electrolytic copper for anode and busbar used in the production of electrolytic copper powder. Is required.
上記課題に対し、本発明者等は鋭意検討の結果、電解銅粉製造に用いられるアノード用電気銅の上部に懸吊用かつ導電用の治具で保持・接続することで、問題点を解消でき、上記電解銅粉製造に用いられるアノード用電気銅を製造するためのパーマネントカソードを特定の形態とすることで、課題を解決することができることを見出した。 As a result of diligent investigations, the present inventors solved the problem by holding and connecting to the upper part of the electrolytic copper for anode used in the production of electrolytic copper powder with a suspension and conductive jig. It has been found that the problem can be solved by making the permanent cathode for producing the electrolytic copper for anode used for producing the electrolytic copper powder into a specific form.
即ち、本発明の銅電解精錬用のパーマネントカソードは、極板上部であり、かつ銅析出部である部位に少なくとも２箇所以上の非電析孔を有することを特徴とするものである。 That is, the permanent cathode for copper electrolytic refining of the present invention is characterized in that it has at least two or more non-deposition holes in a portion which is an upper portion of the electrode plate and is a copper deposition portion.
また、本発明の電解銅粉製造用電気銅アノードは、上記パーマネントカソードを銅電解精錬プロセスに用いることで得られ、非電析孔を有することを特徴とするものである。 Moreover, the electrolytic copper anode for producing electrolytic copper powder of the present invention is obtained by using the permanent cathode in a copper electrolytic refining process, and has a non-deposition hole.
また、本発明の電解銅粉の製造方法は、上記電解銅粉製造用電気銅アノードの非電析孔と電解用導電ブスバー間を懸吊用かつ導電用の治具で保持・接続することを特徴とするものである。 Also, the method for producing electrolytic copper powder of the present invention comprises holding and connecting the non-deposition hole of the electrolytic copper anode for producing electrolytic copper powder and the electroconductive bus bar with a jig for suspension and conduction. It is a feature.
本発明によれば、パーマネントカソード法変換により得られる、リボン等の吊手なし電気銅を用いて、効率良く、かつコスト的にも優れた電解銅粉を製造することができる。 ADVANTAGE OF THE INVENTION According to this invention, the electrolytic copper powder which was efficient and excellent also in cost can be manufactured using electrical copper without a hanger, such as a ribbon, obtained by permanent cathode method conversion.
以下、本発明を実施するための最良の形態を図面に基づいて詳細に説明する。 The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
図１は、代表的な本発明のパーマネントカソードの形態を概略的に示したものである。材質はステンレス鋼が好ましく、厚みは２０ｍｍ〜６０ｍｍ程度が一般的で、少なくとも極板側面に非電析シールが施されている（極板下部は図１のようにシールがあっても良いし、底部が溝状に切込みの入った形態であれば、下部シールは不要でも良い）。 FIG. 1 schematically shows a typical permanent cathode configuration of the present invention. The material is preferably stainless steel, and the thickness is generally about 20 mm to 60 mm, and at least the electrode plate has a non-deposition seal (the bottom of the electrode plate may have a seal as shown in FIG. The bottom seal may be unnecessary if the bottom has a groove-like cut.
この図を見て分かるように、このパーマネントカソードにおける非電析孔は、銅電解精錬にて得られる電解銅粉製造用電気銅アノードが、好適に懸吊かつ導電接続が取れるべく、該アノードの上部、かつ懸吊に好都合な位置になるよう配置されるべきである。 As can be seen from this figure, the non-deposition hole in the permanent cathode is such that the electrolytic copper anode for producing electrolytic copper powder obtained by copper electrolytic refining can be suspended and electrically connected. It should be placed at the top and in a convenient position for suspension.
この非電析孔は、得られる電解銅粉製造用電気銅アノードの懸吊箇所にかかる応力を軽減する上で、少なくとも２箇所は必要であるが、余り多く設けると、パーマネントカソード加工コスト増や電解銅粉製造時の導電接続部増加による工程管理の負担につながるのみならず、非電析孔は平行に並ぶため、極板横方向の断面積が減り、却って電解銅粉製造用電気銅アノードの物理的強度を損ねる。従って多くとも４箇所程度の非電析孔設置で充分である。 These non-deposition holes are required in order to reduce the stress applied to the suspended portion of the obtained electrolytic copper powder production electrolytic copper anode, but at least two locations are necessary. Not only does it lead to the burden of process control due to the increase in conductive connections during the production of electrolytic copper powder, but the non-deposition holes are arranged in parallel, so the cross-sectional area in the lateral direction of the electrode plate is reduced, and on the contrary, an electrolytic copper anode for producing electrolytic copper powder. Impairs the physical strength of Accordingly, it is sufficient to install about 4 non-deposition holes at most.
そして、上記非電析孔は、非導電性材料で充填され、銅電解精錬工程に供されるものである。 And the said non-electrodeposition hole is filled with a nonelectroconductive material, and is used for a copper electrolytic refining process.
この非導電性材料は、加工が容易でかつ耐酸性、耐熱性に優れたものが用いられる。具体的には、ポリエチレン、シリコーンゴム等が挙げられる。 As this non-conductive material, a material that is easy to process and excellent in acid resistance and heat resistance is used. Specific examples include polyethylene and silicone rubber.
また、上記非電析孔は、図２に示すように、パーマネントカソード表裏間の電解液循環や、外部からの押出しや引抜けが起こりにくいように、パーマネントカソード表裏各端部から厚み中心部に向かって先細となり、厚み中心部にて連通してなる形状を呈し、かつ非導電性材料が非電析孔の形状に対し、密着充填されていることが好ましい。この非電析孔の形状は円形、角型等いかなる形態も取り得るが、用いられる接続治具の形態により接触抵抗が変動するので、それが小さくなるよう適宜選択すれば良い。 In addition, as shown in FIG. 2, the non-deposition hole is formed in the center of the thickness from each end of the front and back of the permanent cathode so that the electrolyte circulation between the front and back of the permanent cathode and the extruding and pulling out from the outside hardly occur. It is preferable that the shape becomes tapered toward the center of the thickness and communicates at the center of the thickness, and the non-conductive material is closely packed with respect to the shape of the non-electrodeposition hole. The shape of the non-electrodeposition hole may take any form such as a circle or a square, but the contact resistance varies depending on the form of the connection jig to be used.
また、パーマネントカソードの電析部は、後工程の電解銅粉製造プロセスのスケールにもよるが、おおよそ縦寸法８００ｍｍ〜１５００ｍｍ、横寸法６００ｍｍ〜１２００ｍｍである。従って、上記非電析孔のパーマネントカソード本体上における配置は、以下に示すものとすると好ましい。 Moreover, although the electrodeposition part of a permanent cathode is based also on the scale of the electrolytic copper powder manufacturing process of a post process, it is vertical dimension 800mm-1500mm, and horizontal dimension 600mm-1200mm. Therefore, the arrangement of the non-electrodeposition holes on the permanent cathode body is preferably as follows.
非電析孔は、同じ水平高さに配設され、各非電析孔上端が、パーマネントカソード本体電析部上端から下方に向かって２０ｍｍ以上、１００ｍｍ以下の範囲内に位置するように存在するのが好ましい（図１ 符号６部分の長さ）。この本体上端からの位置が２０ｍｍ未満の場合、孔上端にかかる応力不可が大きすぎ、１００ｍｍを超えると、電解に有効な面積が損なわれ、不味である。 The non-deposition holes are disposed at the same horizontal height, and the upper ends of the non-deposition holes are located in the range of 20 mm or more and 100 mm or less downward from the upper end of the permanent cathode body electrodeposition portion. Is preferable (the length of the reference numeral 6 in FIG. 1). When the position from the upper end of the main body is less than 20 mm, the stress impossibility applied to the upper end of the hole is too large.
また、少なくとも２箇所存在する非電析孔の外側端については、直近のパーマネントカソード本体電析部側端から極板内部に向かって５０ｍｍ以上、３００ｍｍ以下の範囲内に位置するように存在するのが好ましい（図１ 符号７部分の長さ）。この非電析孔の外側端の位置が、上記範囲外の場合、重量バランスが不良で、電解で得られる電気銅に歪みを生じるおそれがある。 In addition, the outer end of the non-electrodeposition hole existing at least in two places exists so as to be located within the range of 50 mm or more and 300 mm or less from the nearest permanent cathode body electrodeposition portion side end toward the inside of the electrode plate. Is preferable (the length of the reference numeral 7 in FIG. 1). If the position of the outer end of the non-deposition hole is outside the above range, the weight balance is poor, and there is a risk of distortion in the electrolytic copper obtained by electrolysis.
なお、パーマネントカソード本体電析部の縦寸法を１００％とすると、非電析孔の中心部は上端から２％〜２０％、パーマネントカソード本体電析部の横寸法を１００％とすると、少なくとも２箇所存在する非電析孔の中心部は両端より５％〜３５％の位置とするのが好ましい。 When the vertical dimension of the permanent cathode main body electrodeposition portion is 100%, the center portion of the non-deposition hole is 2% to 20% from the upper end, and when the horizontal dimension of the permanent cathode main body electrodeposition portion is 100%, at least 2 It is preferable that the center part of the non-electrodeposition hole which exists in a place is made into the position of 5%-35% from both ends.
また、非電析孔の開口面積は、７００ｍｍ２以上、８０００ｍｍ２以下であると好ましい。この開口面積が７００ｍｍ２未満の場合、懸吊・導電用の治具が掛けづらく不味であり、８０００ｍｍ２を超える場合、導電接続における接触抵抗が高くなる等の弊害がある。 The opening area of the non-conductive析孔is, 700 mm 2 or more, if it is 8000mm 2 or less preferred. When the opening area is less than 700 mm 2 , it is not good to hang a jig for suspension / conduction, and when it exceeds 8000 mm 2 , there are problems such as increased contact resistance in conductive connection.
以上述べたような特徴を有するパーマネントカソードと、汎用的な銅電解精錬用電解槽、ならびに乾式工程から製造される粗銅アノードを用いて電解精錬を行うと、パーマネントカソード電析部の形態に応じた、非電析孔を有す電解銅粉製造用電気銅アノードが得られる。このような電解銅粉製造用電気銅アノードであれば、ドリリング等の手間を要さずに、電解銅粉製造用の懸吊接続が可能となる。 When electrolytic refining is performed using a permanent cathode having the characteristics as described above, a general-purpose copper electrolytic refining electrolytic cell, and a crude copper anode produced from a dry process, it corresponds to the form of the permanent cathode electrodeposition part. Thus, an electrolytic copper anode for producing electrolytic copper powder having non-electrodeposition holes can be obtained. With such an electrolytic copper anode for producing electrolytic copper powder, a suspended connection for producing electrolytic copper powder can be achieved without the need for drilling or the like.
また、上記電解銅粉製造用電気銅アノードは、上部の非電析孔と電解銅粉製造用ブスバーとの電気接続を取るため、治具、たとえばＳ字型のステンレス製金具等を介して、上記ブスバーに懸吊され（図３参照）、カソード（一般的には、電気銅アノードと同型の電気銅が用いられる）と共に汎用的な電解銅粉製造用電解槽に供され、公知の電解条件にて、電解銅粉を製造することができる。 In addition, the electrolytic copper anode for producing electrolytic copper powder is electrically connected to the upper non-deposition hole and the bus bar for producing electrolytic copper powder through a jig, for example, an S-shaped stainless steel fitting, It is suspended from the bus bar (see FIG. 3), and is supplied to a general electrolytic cell for producing electrolytic copper powder together with a cathode (generally, the same type of electrolytic copper as that of an electrolytic copper anode). Thus, electrolytic copper powder can be produced.
以上、本発明の好ましい実施例について詳述したが、本発明は係る特定の実施形態に限定されるものではなく、特許請求の範囲に記載された本発明の要旨の範囲内において、種々の変形・変更が可能である。 The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims.・ Change is possible.
１…パーマネントカソード本体
２…非電析孔（非導電性材料充填）
３…非電析シール部
４…パーマネントカソードブスバー
５…電解時液面浸漬上限
６…カソード本体電析部上端〜非電析孔上端長さ
７…カソード本体電析部側端〜非電析孔外側端長さ
８…電解銅粉製造用電気銅アノード
９…導電接続治具
１０…電解銅粉製造電解用ブスバー
1 ... Permanent cathode body 2 ... Non-deposition hole (filled with non-conductive material)
3 ... Non-deposition seal part 4 ... Permanent cathode bus bar 5 ... Upper limit of liquid surface immersion during electrolysis 6 ... Upper length of cathode body electrodeposition part to upper end of non-deposition hole 7 ... End face of cathode body electrodeposition part-Non-deposition hole Outer end length 8 ... Electro copper anode for producing electrolytic copper powder 9 ... Conductive connection jig 10 ... Bus bar for producing electrolytic copper powder
Claims (8)
A method for producing electrolytic copper powder, characterized in that a non-deposition hole of an electrolytic copper anode for producing electrolytic copper powder according to claim 7 and a conductive bus bar for electrolysis are held and connected by a jig for suspension and conduction. .
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| JPS5448015A (en) * | 1977-09-24 | 1979-04-16 | Yamaha Motor Co Ltd | Flywheel magneto |
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