JP5407608B2 - Separation and recovery method of active material and lead alloy of electrode plate for lead storage battery and apparatus used therefor - Google Patents

Separation and recovery method of active material and lead alloy of electrode plate for lead storage battery and apparatus used therefor Download PDF

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JP5407608B2
JP5407608B2 JP2009162320A JP2009162320A JP5407608B2 JP 5407608 B2 JP5407608 B2 JP 5407608B2 JP 2009162320 A JP2009162320 A JP 2009162320A JP 2009162320 A JP2009162320 A JP 2009162320A JP 5407608 B2 JP5407608 B2 JP 5407608B2
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active material
electrode plate
lead
lattice
grid
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JP2011018555A (en
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敦 鈴木
政敏 宮塚
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Resonac Corp
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Shin Kobe Electric Machinery Co Ltd
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Description

本発明は、鉛蓄電池用極板から活物質と鉛合金を分離回収する方法及びそれに用いる装置に関するものである。   The present invention relates to a method for separating and recovering an active material and a lead alloy from an electrode plate for a lead storage battery, and an apparatus used therefor.

従来、鉛蓄電池用極板の製造工程は、鉛または鉛合金からなる格子体を製造する工程、酸化鉛粉を水と硫酸で混練して活物質となるペーストを製造する工程、このペーストを前記格子体に充填し極板とする工程、前記極板を所定の湿度雰囲気で熟成した後に乾燥する工程から成る。この後、極板は組立工程に送られ、セパレータやその他の部品を組み付け電槽に収容して液無しの電池とされる。続いて、電解液（希硫酸）を注液して通電する化成工程を経て製品となる。   Conventionally, the manufacturing process of the electrode plate for a lead storage battery includes a process for manufacturing a grid made of lead or a lead alloy, a process for manufacturing a paste as an active material by kneading lead oxide powder with water and sulfuric acid, The method includes a step of filling a grid body to form an electrode plate, and a step of drying the electrode plate after aging in a predetermined humidity atmosphere. Thereafter, the electrode plate is sent to an assembly process, and a separator and other parts are assembled in a battery case to form a battery without liquid. Subsequently, a product is obtained through a chemical conversion step in which an electrolytic solution (dilute sulfuric acid) is injected and energized.

各工程では、製造中に様々な要因で後工程に送れない仕損品が発生することがある。これら仕損品をそのまま廃棄するのは、コストがかかり環境面からも好ましくない。そこで、再利用して電池の製造工程に戻す必要がある。このうち、熟成、乾燥工程以前の状態の極板であれば、極板を水に浸漬し揺動することで容易に活物質と格子体に分離できる。格子体は再溶解し、格子体製造工程の原料として使用する。   In each process, a defective product that cannot be sent to the subsequent process may occur during manufacturing due to various factors. It is not preferable from the environmental point of view to dispose of these damaged products as they are. Therefore, it is necessary to recycle and return to the battery manufacturing process. Among these, if the electrode plate is in a state before the aging and drying process, it can be easily separated into the active material and the lattice by immersing the electrode plate in water and swinging. The lattice is redissolved and used as a raw material for the lattice manufacturing process.

鉛蓄電池の格子体には、製造法により鋳造格子体とエキスパンド格子体がある。近年主流となっているエキスパンド格子体を用いた極板は、充填工程でペースト紙といわれる薄い紙を極板に貼り付け、充填したペーストが格子体から脱落するのを防止している。このペースト紙は格子体や活物資とは物性が異なるため、分離、回収の障害となっていた。   There are two types of grids for lead-acid batteries: cast grids and expanded grids, depending on the manufacturing method. In recent years, an electrode plate using an expanded lattice, which has become the mainstream, has stuck a thin paper called paste paper to the electrode plate in the filling process to prevent the filled paste from falling off the lattice. Since this paste paper has different physical properties from the lattice and active materials, it has been an obstacle to separation and recovery.

鉛蓄電池用極板から活物質と鉛合金を分離回収するために、特許文献１には、溶解炉内の上部に極板又は極板群のいずれか一方又は双方からなる被溶解物を投入する部屋が設けられ、溶解炉内の下部には被溶解物を熱溶解した溶解鉛合金を回収する溶解鉛合金回収部屋が設けられ、両部屋の間は被溶解物を加熱して溶解させると共に、得られた溶融鉛合金を孔から落として分離する有孔分離板で仕切った装置が開示されている。また、特許文献２には、鉛蓄電池用極板を圧延することにより、活物質を粉砕して格子体から分離し、格子体を構成している材料を回収する方法及び装置が開示されている。   In order to separate and recover the active material and lead alloy from the electrode plate for lead-acid batteries, Patent Document 1 introduces an object to be dissolved consisting of one or both of the electrode plate and the electrode plate group into the upper part of the melting furnace. A room is provided, and a lower part in the melting furnace is provided with a molten lead alloy recovery room for recovering a molten lead alloy obtained by thermally melting the substance to be melted. An apparatus in which the obtained molten lead alloy is partitioned by a perforated separating plate that drops and separates from the hole is disclosed. Patent Document 2 discloses a method and an apparatus for recovering the material constituting the lattice body by rolling the electrode plate for a lead storage battery to pulverize and separate the active material from the lattice body. .

特開平８−４５５６５号公報JP-A-8-45565 特開２００８−１３０４３９号公報JP 2008-130439 A

特許文献１の方法は、被溶解物を加熱するのは有孔分離板と周囲の大気である。有孔分離板は被溶解物との接触面積が小さく、被溶解物の活物質部分は多孔質の鉛化合物で熱伝達の効率が低い。大気も被溶解物の溶解にはほとんど寄与しないので被溶解物の溶解に時間がかかるといった問題がある。   In the method of Patent Document 1, it is the perforated separator and the surrounding air that heat the material to be dissolved. The perforated separator has a small contact area with the material to be dissolved, and the active material portion of the material to be dissolved is a porous lead compound and has low heat transfer efficiency. Since the atmosphere hardly contributes to the dissolution of the material to be dissolved, there is a problem that it takes time to dissolve the material to be dissolved.

特許文献２の方法は、機械的に極板を粉砕するため、鉛化合物の粉塵が多量に発生する。そのため、装置全体をカバーして、外部の集塵機で鉛粉塵を回収しなければならない。また、装置各部への鉛粉塵の付着は避けられず、定期的な洗浄が必要であり、運用コストが高くなる問題があった。   Since the method of Patent Document 2 mechanically pulverizes the electrode plate, a large amount of lead compound dust is generated. Therefore, the entire apparatus must be covered and lead dust must be collected with an external dust collector. In addition, adhesion of lead dust to each part of the apparatus is unavoidable, and regular cleaning is required, resulting in a problem of high operating costs.

本発明が解決しようとする課題は、短時間で格子体を溶解し、鉛粉塵の飛散を抑制して、極板から活物質と鉛合金を分離回収することである。   The problem to be solved by the present invention is to separate and recover the active material and the lead alloy from the electrode plate by dissolving the lattice in a short time, suppressing the scattering of lead dust.

上記課題を解決するため本発明では、鉛蓄電池用極板から活物質と鉛合金を分離回収する方法であって、前記極板に水流を噴射して活物質と格子体に分離する工程、前記格子体を乾燥する工程、前記格子体を熱溶解する工程を有することを特徴とする。 In order to solve the above problems, the present invention is a method for separating and recovering an active material and a lead alloy from an electrode plate for a lead storage battery, wherein the step of separating the active material and the lattice by injecting a water flow onto the electrode plate, It has the process of drying a grid | lattice body and the process of heat-melting the said grid | lattice body.

殊に本発明では、ペースト紙が貼付された鉛蓄電池用極板から活物質と鉛合金を分離回収する方法であって、前記極板に水流を噴射して活物質と格子体に分離する工程、ペースト紙が付着したままの前記格子体を乾燥する工程、前記格子体をペースト紙が付着したまま熱溶解する工程を経ることを特徴とする。 In particular, the present invention is a method for separating and recovering an active material and a lead alloy from an electrode plate for a lead storage battery to which a paste paper is affixed, the step of separating the active material and the lattice by injecting a water flow onto the electrode plate. And a step of drying the lattice body with the paste paper attached thereto, and a step of thermally melting the lattice body with the paste paper attached thereto.

上記ペースト紙が付着したままの格子体を乾燥する工程において、ペースト紙の水分含有率〔（ペースト紙質量−ペースト紙の絶対乾燥質量）／ペースト紙質量×１００〕を１０％以下にすることを特徴とする。 In the step of drying the lattice body with the paste paper adhered, the moisture content of the paste paper [(paste paper mass−paste paper absolute dry mass) / paste paper mass × 100] should be 10% or less. Features.

上記の極板に水流を噴射して活物質と格子体に分離する工程では、外部と隔離された空間内を、鉛蓄電池用極板を載置して水平方向に移動するメッシュコンベアと、メッシュコンベア上方に設置されメッシュコンベアに向かって水流を噴射するノズルと、メッシュコンベア下方に設置された活物質回収かごと、メッシュコンベア終端に設置された格子体回収かごとを備えた分離装置が用いられる。 In the step of separating the active material and the grid by injecting a water flow onto the electrode plate, a mesh conveyor for moving the lead storage battery electrode plate horizontally in a space isolated from the outside, and a mesh a nozzle for injecting a water flow toward the installed mesh conveyor to the conveyor upwards, and the active material recovery cage disposed below the mesh conveyor, separation device that includes a the installed grid recovered basket mesh conveyor end is used is Ru.

本発明によれば、短時間で格子体を溶解し、鉛粉塵の飛散を抑制して、極板から活活物質と鉛合金を分離回収することができる。   According to the present invention, the active material and the lead alloy can be separated and recovered from the electrode plate by dissolving the lattice in a short time and suppressing the scattering of lead dust.

本発明の工程フロー図である。It is a process flow figure of the present invention. 本発明の鉛蓄電池用極板の活物質と格子体の分離装置を示す図である。It is a figure which shows the separation apparatus of the active material and grid | lattice body of the electrode plate for lead acid batteries of this invention.

以下、本発明の実施の形態について詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail.

本発明の工程フローを図１に示す。
（分離工程）
仕損品の鉛蓄電池用極板に水流を噴射して、活物質と格子体に分離する工程である。
（乾燥工程）
前記格子体または、ペースト紙が貼付された鉛蓄電池用極板ではペースト紙が付着したままの格子体を乾燥する工程である。
（溶解工程）
前記格子体または、前記ペースト紙が付着したままの格子体を熱溶解する工程である。 The process flow of the present invention is shown in FIG.
(Separation process)
This is a step of spraying a water flow onto a lead-acid battery electrode plate, which is a defective product, and separating it into an active material and a lattice.
(Drying process)
This is a step of drying the grid body or the grid body on which the paste paper is adhered on the electrode plate for a lead storage battery to which the paste paper is attached.
(Dissolution process)
This is a step of thermally melting the lattice body or the lattice body with the paste paper attached thereto.

前述のように、格子体の種類によってペースト紙の有無があるので、それぞれの場合について説明する。   As described above, there is the presence or absence of paste paper depending on the type of the lattice, and each case will be described.

参考例
鋳造格子体を用いた極板１５について説明する。
（分離工程）
図２に鉛蓄電池用極板の活物質と格子体の分離工程で用いる装置を示す。分離装置１は外部と隔離された空間で、メッシュコンベア２が貫通している。メッシュコンベア２は、メッシュベルト２ａとローラ３で構成され、メッシュベルト２ａは、ステンレスの鋼線を網目状にして作られている。ローラ３は図示しないモータで矢印方向に回転され、メッシュベルト２ａを駆動する。極板１５は搬送経路１０から矢印方向に搬送され、メッシュコンベア２に移送される。メッシュコンベア２は極板１５を載置し、速度０．５ｍ／ｍｉｎで右から左へ水平方向に移動する。 Reference Example An electrode plate 15 using a cast grid will be described.
(Separation process)
FIG. 2 shows an apparatus used in the separation process of the active material and the grid of the lead storage battery electrode plate. The separation device 1 is a space isolated from the outside, and the mesh conveyor 2 passes therethrough. The mesh conveyor 2 includes a mesh belt 2a and a roller 3, and the mesh belt 2a is made of a stainless steel wire having a mesh shape. The roller 3 is rotated in the direction of the arrow by a motor (not shown) to drive the mesh belt 2a. The electrode plate 15 is conveyed in the direction of the arrow from the conveyance path 10 and transferred to the mesh conveyor 2. The mesh conveyor 2 carries the electrode plate 15 and moves horizontally from right to left at a speed of 0.5 m / min.

分離装置１の上部には送水管４が貫通し、メッシュコンベア２の上方に設置され、メッシュコンベアに向かって水流を噴射するノズル５が３箇所設けられている。送水管４は通常バルブで閉められているが、分離装置１の運転時にはバルブを開放し、左から右方向（矢印で図示）に送水される。このとき、ノズル５からは０．５〜１．５ＭＰａの水圧で、一本あたり２０Ｌ／ｍｉｎの水流６が噴射される。   A water supply pipe 4 penetrates through the upper part of the separation device 1 and is provided above the mesh conveyor 2 and is provided with three nozzles 5 for injecting a water flow toward the mesh conveyor. The water supply pipe 4 is normally closed with a valve, but when the separator 1 is in operation, the valve is opened and water is supplied from the left to the right (illustrated by arrows). At this time, a water flow 6 of 20 L / min is injected from the nozzle 5 at a water pressure of 0.5 to 1.5 MPa.

この水流６によって極板１５から活物質１６が分離し、格子体１７がメッシュベルト２ａ上に残り搬送される。活物質１６は水流６にのって、メッシュベルト２ａの網目開口部から下方へ流出し、メッシュコンベア２の下方に設置された活物質回収かご７に捕集される。活物質回収かご７は網目状のかごで、水は網目から流出し排水管８から排水される。活物質回収かご７が活物質１６で満杯になったら、水洗装置１から引き出される。活物質１６は、乾燥、粉砕処理して、ペースト製造工程で再利用される。   The active material 16 is separated from the electrode plate 15 by the water flow 6, and the lattice body 17 remains on the mesh belt 2a and is conveyed. The active material 16 flows along the water flow 6 and flows downward from the mesh opening of the mesh belt 2 a and is collected in an active material recovery basket 7 installed below the mesh conveyor 2. The active material recovery cage 7 is a mesh cage, and water flows out from the mesh and drains from the drain pipe 8. When the active material recovery basket 7 is filled with the active material 16, it is pulled out from the water washing apparatus 1. The active material 16 is dried and pulverized and reused in the paste manufacturing process.

前記格子体１７は、メッシュコンベア２の左端から落下し、メッシュコンベア２の終端に設置された格子体回収かご９に捕集される。上記の条件で、極板１５の処理量は５０ｋｇ／ｈであった。このように分離工程は、水流の噴射によって活物質を格子体から洗い流しているので、活物質の粉塵が大気中に飛散することはない。
（乾燥工程）
前記格子体１７を６５ｋｇ捕集した格子体回収かご９を乾燥炉へ移動させ、温度１３０℃で加熱した。乾燥効率を上げるために、格子体回収かご９は網目またはパンチングメタルなどのように、熱風が循環する構造が好ましい。 The lattice body 17 falls from the left end of the mesh conveyor 2 and is collected in a lattice body recovery car 9 installed at the end of the mesh conveyor 2. Under the above conditions, the throughput of the electrode plate 15 was 50 kg / h. As described above, since the active material is washed away from the lattice by the jet of water, the separation of the active material does not scatter in the atmosphere.
(Drying process)
The grid collection basket 9 collecting 65 kg of the grid 17 was moved to a drying furnace and heated at a temperature of 130 ° C. In order to increase the drying efficiency, the lattice collection basket 9 preferably has a structure in which hot air circulates, such as a mesh or punching metal.

乾燥１時間ごとに格子体回収かご９から格子体１７の破片をサンプリングして、水分の付着を観察する。水分の付着がなくなったら乾燥を終了し、次の工程へ移動させる。
（溶解工程）
溶解炉の底部に鉛合金を入れ、溶解炉を加熱する。底部の前記鉛合金は溶融鉛となる。続いて、乾燥後の前記格子体１７を溶解炉に投入する。格子体１７は熱容量が小さいため、前記溶融鉛に容易に溶解し鉛合金の溶融物となる。溶解温度は４５０℃程度にすると適度な流動性を持ち、回収の作業性が良い。この熱溶解は格子体１７を直接溶解するので、前述の特許文献１の方法より短時間で溶解できる。 Samples of the lattice 17 are sampled from the lattice collection basket 9 every hour of drying, and adhesion of moisture is observed. When there is no more moisture adhering, the drying is finished and moved to the next step.
(Dissolution process)
Lead alloy is put in the bottom of the melting furnace and the melting furnace is heated. The lead alloy at the bottom becomes molten lead. Subsequently, the dried grid body 17 is put into a melting furnace. Since the lattice body 17 has a small heat capacity, it easily dissolves in the molten lead and becomes a molten lead alloy. When the melting temperature is about 450 ° C., it has appropriate fluidity and good recovery workability. Since this thermal melting directly melts the lattice body 17, it can be melted in a shorter time than the method of Patent Document 1 described above.

実施例
ペースト紙が貼付された、エキスパンド格子体を用いた極板１５’について説明する。（分離工程）
図２に示した分離装置を用いる。分離装置１は外部と隔離された空間で、メッシュコンベア２が貫通している。メッシュコンベア２は、メッシュベルト２ａとローラ３で構成され、メッシュベルト２ａは、ステンレスの鋼線を網目状にして作られている。ローラ３は図示しないモータで矢印方向に回転され、メッシュベルト２ａを駆動する。極板１５’は搬送経路１０から矢印方向に搬送され、メッシュコンベア２に移送される。メッシュコンベア２は極板１５’を載置し、速度０．５ｍ／ｍｉｎで右から左へ水平方向に移動する。 Example An electrode plate 15 'using an expanded lattice body to which paste paper is attached will be described. (Separation process)
The separation apparatus shown in FIG. 2 is used . The separation device 1 is a space isolated from the outside, and the mesh conveyor 2 passes therethrough. The mesh conveyor 2 includes a mesh belt 2a and a roller 3, and the mesh belt 2a is made of a stainless steel wire having a mesh shape. The roller 3 is rotated in the direction of the arrow by a motor (not shown) to drive the mesh belt 2a. The electrode plate 15 ′ is transported in the direction of the arrow from the transport path 10 and transferred to the mesh conveyor 2. The mesh conveyor 2 carries the electrode plate 15 ′ and moves horizontally from right to left at a speed of 0.5 m / min.

分離装置１の上部には送水管４が貫通し、メッシュコンベア２の上方に設置され、メッシュコンベアに向かって水流を噴射するノズル５が３箇所設けられている。送水管４は通常バルブで閉められているが、分離装置１の運転時にはバルブを開放し、左から右方向（矢印で図示）に送水される。このとき、ノズル５からは０．５〜１．５ＭＰａの水圧で、一本あたり２０Ｌ／ｍｉｎの水流６が噴射される。   A water supply pipe 4 penetrates through the upper part of the separation device 1 and is provided above the mesh conveyor 2 and is provided with three nozzles 5 for injecting a water flow toward the mesh conveyor. The water supply pipe 4 is normally closed with a valve, but when the separator 1 is in operation, the valve is opened and water is supplied from the left to the right (illustrated by arrows). At this time, a water flow 6 of 20 L / min is injected from the nozzle 5 at a water pressure of 0.5 to 1.5 MPa.

この水流６によって極板１５’から活物質１６が分離し、格子体１７’がメッシュベルト２ａ上に残り搬送される。格子体１７’にはペースト紙が絡み付いて付着しているが、図が煩雑になるのでペースト紙は図示していない。活物質１６は水流６にのって、メッシュベルト２ａの網目開口部から下方へ流出し、メッシュコンベア２の下方に設置された活物質回収かご７に捕集される。活物質回収かご７は網目状のかごで、水は網目から流出し排水管８から排水される。活物質回収かご７が活物質１６で満杯になったら、分離装置１から引き出される。活物質１６は、乾燥、粉砕処理して、ペースト製造工程で再利用される。   The active material 16 is separated from the electrode plate 15 ′ by the water flow 6, and the lattice body 17 ′ remains on the mesh belt 2 a and is conveyed. Although the paste paper is entangled and adhered to the lattice 17 ', the drawing is not shown because the figure becomes complicated. The active material 16 flows along the water flow 6 and flows downward from the mesh opening of the mesh belt 2 a and is collected in an active material recovery basket 7 installed below the mesh conveyor 2. The active material recovery cage 7 is a mesh cage, and water flows out from the mesh and drains from the drain pipe 8. When the active material recovery basket 7 is filled with the active material 16, it is pulled out from the separation device 1. The active material 16 is dried and pulverized and reused in the paste manufacturing process.

前記ペースト紙が付着した格子体１７’は、メッシュコンベア２の左端から落下し、メッシュコンベア２の終端に設置された格子体回収かご９に捕集される。上記の条件で、極板１５’の処理量は５０ｋｇ／ｈであった。   The grid body 17 ′ to which the paste paper is attached falls from the left end of the mesh conveyor 2 and is collected in the grid body collection basket 9 installed at the end of the mesh conveyor 2. Under the above conditions, the throughput of the electrode plate 15 ′ was 50 kg / h.

このように水洗工程は、水流の噴射によって活物質を格子体から洗い流しているので、活物質の粉塵が大気中に飛散することはない。
（乾燥工程）
前記ペースト紙が付着した格子体を格子体１７’を６５ｋｇ捕集した格子体回収かご９を乾燥炉へ移動させ、温度１３０℃で加熱した。乾燥効率を上げるために、格子体回収かご９は網目またはパンチングメタルなどのように、熱風が循環する構造が好ましい。 In this way, in the water washing step, the active material is washed away from the lattice body by jetting water flow, so that the dust of the active material is not scattered in the atmosphere.
(Drying process)
The grid body collection basket 9 in which 65 kg of the grid body 17 ′ was collected from the grid body to which the paste paper adhered was moved to a drying furnace and heated at a temperature of 130 ° C. In order to increase the drying efficiency, the lattice collection basket 9 preferably has a structure in which hot air circulates, such as a mesh or punching metal.

乾燥１時間ごとに格子体回収かご９からペースト紙を１０ｇサンプリングして、赤外線水分量計で水分含有率を測定する。サンプリング場所は、格子体回収かご９のできるだけ内部が好ましい。ペースト紙の水分含有率は次の式１によって求められる。
ペースト紙の水分含有率（％）＝（乾燥後のペースト紙質量−ペースト紙の絶対乾燥質量）／乾燥後のペースト紙質量×１００ ・・・・・（１）
ペースト紙に水分が残留していると、次の溶解工程で溶解効率が低下するばかりか、水の体積膨張で溶融鉛が飛散する危険性があるので、この工程でペースト紙の水分含有率を下げなければならない。予備実験により、水分含有率１０％以下ならば次工程で危険性がないことを確認した。 10g of paste paper is sampled from the grid body recovery basket 9 every hour of drying, and the moisture content is measured with an infrared moisture meter. The sampling location is preferably as much as possible inside the grid recovery basket 9. The moisture content of the paste paper is obtained by the following equation 1.
Water content of paste paper (%) = (mass of paste paper after drying−absolute dry mass of paste paper) / mass of paste paper after drying × 100 (1)
If moisture remains in the paste paper, not only will the dissolution efficiency be reduced in the next dissolution process, but there is a risk that the molten lead will scatter due to the volume expansion of the water. Must be lowered. Preliminary experiments confirmed that there was no danger in the next step if the water content was 10% or less.

ペースト紙の水分含有率が１０％以下になったら、３０分後に再度サンプリングして、同様に水分含有率を測定する。これは、ペースト紙は格子体回収かご９中にランダムに分布しているため、安全を期するためである。この測定で、水分含有率が１０％以下であるならば、次の工程へ移行する。
（溶解工程）
溶解炉の底部に鉛合金を入れ、溶解炉を加熱する。底部の前記鉛合金は溶融鉛となる。続いて、乾燥後の前記ペースト紙が付着した格子体１７’を溶解炉に投入する。格子体１７’は熱容量が小さいため、前記溶融鉛に容易に溶解し鉛合金の溶融物となる。このとき、ペースト紙は木質紙の発火温度（２８０〜３００℃）で燃焼し、格子体１７’は３３０℃以上で溶解が始まる。溶解した格子体１７’は、鉛合金の溶融物となる。溶解温度は４５０℃程度にすると適度な流動性を持ち、回収の作業性が良い。ペースト紙の燃焼残渣は溶融鉛合金の上に鉛酸化物と共に浮遊するので、これをスコップ状の道具で除去した後、鉛合金をひしゃくなどですくいとる。 When the moisture content of the paste paper becomes 10% or less, sampling is performed again after 30 minutes, and the moisture content is measured in the same manner. This is because the paste paper is randomly distributed in the grid body recovery basket 9 and is therefore safe. If the moisture content is 10% or less in this measurement, the process proceeds to the next step.
(Dissolution process)
Lead alloy is put in the bottom of the melting furnace and the melting furnace is heated. The lead alloy at the bottom becomes molten lead. Subsequently, the grid body 17 ′ to which the paste paper after drying is attached is put into a melting furnace. Since the lattice body 17 'has a small heat capacity, it easily dissolves in the molten lead and becomes a molten lead alloy. At this time, the paste paper burns at the ignition temperature (280 to 300 ° C.) of the wooden paper, and the lattice 17 ′ starts to melt at 330 ° C. or higher. The dissolved lattice 17 ′ becomes a lead alloy melt. When the melting temperature is about 450 ° C., it has appropriate fluidity and good recovery workability. The combustion residue of the paste paper floats with the lead oxide on the molten lead alloy. After removing this with a scoop-like tool, scrub the lead alloy.

以上のように本発明では、短時間で格子体を溶解し、鉛粉塵の飛散を抑制して、極板から活物質と鉛合金を分離回収することができる。   As described above, in the present invention, the active material and the lead alloy can be separated and recovered from the electrode plate by dissolving the lattice in a short time and suppressing the scattering of lead dust.

１ 分離装置
２ メッシュコンベア
２ａ メッシュベルト
３ ローラ
４ 送水管
５ ノズル
６ 水流
７ 活物質回収かご
８ 排水管
９ 格子体回収かご
１０ 搬送経路
１５ （鋳造格子体を用いた）極板
１５‘ （エキスパンド格子体を用いた）極板
１６ 活物質
１７ 分離後の（鋳造）格子体
１７’ 分離後の（エキスパンド）格子体 DESCRIPTION OF SYMBOLS 1 Separator 2 Mesh conveyor 2a Mesh belt 3 Roller 4 Water supply pipe 5 Nozzle 6 Water flow 7 Active material collection basket 8 Drain pipe 9 Grid collection basket 10 Conveyance path 15 Electrode plate 15 '(expanded grid) Plate 16) active material 17 (cast) lattice 17 'after separation (expanded) lattice after separation

Claims (1)

ペースト紙が貼付された鉛蓄電池用極板から活物質と鉛合金を分離回収する方法であって、前記極板に水流を噴射して活物質と格子体に分離する工程、ペースト紙が付着したままの前記格子体を乾燥する工程、前記格子体をペースト紙が付着したまま熱溶解する工程を経るものであり、前記ペースト紙が付着したままの格子体を乾燥する工程において、ペースト紙の水分含有率〔（ペースト紙質量−ペースト紙の絶対乾燥質量）／ペースト紙質量×１００〕を１０％以下にすることを特徴とする鉛蓄電池用極板の活物質と鉛合金の分離回収方法。 A method for separating and recovering an active material and a lead alloy from an electrode plate for a lead-acid battery to which a paste paper is affixed, the step of injecting a water flow onto the electrode plate to separate the active material and the grid, and the paste paper adhered drying the grid remain, the grid is shall through a process of hot-melt remains paste sheet is adhered, in the step of drying the grid which remains the paste sheet is adhered, paste paper A method for separating and recovering an active material and a lead alloy of an electrode plate for a lead storage battery, wherein the moisture content [(mass of paste paper−absolute dry mass of paste paper) / mass of paste paper × 100] is 10% or less .
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