JPH0973924A - Lead alloy melting method - Google Patents
Lead alloy melting methodInfo
- Publication number
- JPH0973924A JPH0973924A JP22878295A JP22878295A JPH0973924A JP H0973924 A JPH0973924 A JP H0973924A JP 22878295 A JP22878295 A JP 22878295A JP 22878295 A JP22878295 A JP 22878295A JP H0973924 A JPH0973924 A JP H0973924A
- Authority
- JP
- Japan
- Prior art keywords
- lead
- melting
- powder
- dross
- 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.)
- Pending
Links
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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
Landscapes
- Secondary Cells (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は鉛電池製造や鉛電池の廃
電池からの鉛回収などにおいて行われる鉛合金の溶解方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for melting a lead alloy, which is carried out in the production of lead batteries and the recovery of lead from waste batteries of lead batteries.
【０００２】[0002]
【従来の技術】従来、鉛合金の溶解には、ガスバーナー
あるいは電気炉などを用いた溶解釜が用いられ、その上
面からインゴットや廃電池極板屑などが供給されてい
た。この方法によれば、溶融金属の表面に鉄などの不純
物を含む鉛合金の酸化物がドロスとして生成していた。2. Description of the Related Art Heretofore, a melting pot using a gas burner or an electric furnace has been used for melting lead alloys, and ingots, waste battery electrode plate scraps, etc. have been supplied from the upper surface thereof. According to this method, an oxide of a lead alloy containing impurities such as iron was produced as dross on the surface of the molten metal.
【０００３】[0003]
【発明が解決しようとする課題】上記従来の方法によれ
ば、溶融金属の表面に生成したドロスと呼ばれる酸化物
を定期的に除去しなければ、溶解釜の熱効率が低下した
り、溶融金属へ不純物が混入したりして、溶融金属の品
位が低下する現象がみられた。また、溶融金属の表面に
生成したドロスの発生量が増加すると、ドロスの除去頻
度を高くしなければならず、作業性の低下をも生じさせ
ていた。さらに、生成したドロス中には不純物とともに
鉛合金が多く含まれ、合金溶融時におけるロス発生の原
因となっていた。According to the above-mentioned conventional method, unless the oxide called dross formed on the surface of the molten metal is regularly removed, the thermal efficiency of the melting pot is lowered and the molten metal is not converted into molten metal. The phenomenon that the quality of the molten metal deteriorates due to the inclusion of impurities was observed. In addition, when the amount of dross generated on the surface of the molten metal increases, the frequency of dross removal must be increased, resulting in a decrease in workability. Further, the produced dross contains a large amount of lead alloy together with impurities, which causes loss during melting of the alloy.
【０００４】[0004]
【課題を解決するための手段】本発明の鉛合金の溶解方
法は上記従来の問題点を解決するもので、鉛−カルシウ
ム−錫合金の溶解方法であって、溶解釜内の溶融金属表
面に炭素および酸化鉛ＰｂＯx （０．５＜Ｘ＜２）の粉
末を存在させたことを特徴とする。The method for melting a lead alloy according to the present invention solves the above-mentioned conventional problems, and is a method for melting a lead-calcium-tin alloy, in which the surface of the molten metal in the melting pot is A powder of carbon and lead oxide PbO x (0.5 <X <2) was present.
【０００５】この場合、前記合金の溶融温度を６００℃
〜７５０℃とするとともに、炭素および酸化鉛ＰｂＯx
（０．５＜Ｘ＜２）の粉末を合金に対し、各々２〜５ｗ
ｔ％存在させることが好ましい。In this case, the melting temperature of the alloy is 600 ° C.
~ 750 ° C, carbon and lead oxide PbO x
Powder of (0.5 <X <2) is 2 to 5 w for each alloy.
t% is preferably present.
【０００６】また、前記炭素粉末はコークス、石油コー
クス、コークス粉、黒鉛、カーボンブラック、木炭また
はその他の石炭類の何れか一種以上からなることが好ま
しい。The carbon powder is preferably made of one or more of coke, petroleum coke, coke powder, graphite, carbon black, charcoal, and other coals.
【０００７】また、前記酸化鉛ＰｂＯx （０．５＜Ｘ＜
２）粉末は、Ｐｂ3 Ｏ4 、ＰｂＯの何れか一種以上から
なり、その比表面積が０．５〜２．５ｍ2 ／ｇであるこ
とが好ましい。The lead oxide PbO x (0.5 <X <
2) The powder is preferably made of one or more of Pb 3 O 4 and PbO and has a specific surface area of 0.5 to 2.5 m 2 / g.
【０００８】上記本発明鉛合金の溶解方法は溶融金属の
表面に炭素からなる還元剤と同時に、酸化鉛ＰｂＯ
x （０．５＜Ｘ＜２）を存在させることにより、溶融金
属の表面における空気酸化を抑制するとともに、酸化鉛
ＰｂＯx （０．５＜Ｘ＜２）粉末によりドロスの還元を
促進させるものである。According to the method of melting a lead alloy of the present invention, lead oxide PbO is formed on the surface of the molten metal at the same time as the reducing agent containing carbon.
The presence of x (0.5 <X <2) suppresses air oxidation on the surface of the molten metal and promotes the reduction of dross by the lead oxide PbO x (0.5 <X <2) powder. Is.
【０００９】[0009]
【作用】溶融金属の表面には合金の密度の違いにより、
不純物およびカルシウムを多く含んだ酸化鉛層が生成
し、下部には鉛−カルシウム−錫合金が溶融している。
表面に生成した酸化鉛は炭素により鉛へと還元され、こ
のとき炭素は酸化されて二酸化炭素となり、ガスとして
排気される。一方、溶融金属表面の酸化鉛ＰｂＯ
x（０．５＜Ｘ＜２）粉末は比表面積が０．５〜２．５
ｍ2 ／ｇと大きいため反応性に富み、ドロス中の酸化物
との交換反応によりドロス中の鉛合金をさらに回収する
ことができる。このため、生成する鉛酸化物からなるド
ロスを極めて少量にすることができ、溶融によるロスを
削減し、廃電池極板屑からの鉛合金回収量を最大とする
とともに、鉛合金溶融時のドロス発生を最小にすること
ができる。[Function] Due to the difference in alloy density on the surface of molten metal,
A lead oxide layer containing a large amount of impurities and calcium is formed, and a lead-calcium-tin alloy is melted in the lower part.
The lead oxide generated on the surface is reduced to lead by carbon, and at this time, the carbon is oxidized to carbon dioxide and is exhausted as a gas. On the other hand, lead oxide PbO on the surface of molten metal
x (0.5 <X <2) powder has a specific surface area of 0.5 to 2.5
Since it is as large as m 2 / g, it is highly reactive, and the lead alloy in the dross can be further recovered by the exchange reaction with the oxide in the dross. Therefore, the dross formed from lead oxide can be made extremely small, the loss due to melting can be reduced, and the amount of lead alloy recovered from waste battery electrode plate scrap can be maximized. Occurrence can be minimized.
【００１０】上記の方法により、炭素と酸化鉛ＰｂＯx
（０．５＜Ｘ＜２）粉末を溶融金属の表面に存在させる
ことにより、ドロスの発生を抑制し、効率の良い鉛合金
の溶融および廃鉛電池極板屑からの合金回収が可能とな
る。By the above method, carbon and lead oxide PbO x are formed.
The presence of the (0.5 <X <2) powder on the surface of the molten metal suppresses the generation of dross, and enables efficient melting of the lead alloy and recovery of the alloy from the waste lead battery electrode plate scrap. .
【００１１】[0011]
【実施例】以下に本発明の実施例を図により説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１２】図１は鉛合金の溶解に用いる鉛合金溶解装
置を示すもので、図示の鉛合金溶解装置１の溶解釜２内
には鉛合金のインゴットを１トン溶解してある。また、
この溶解釜２内の溶融金属３表面には鉛合金に対して２
〜５ｗｔ％の炭素粉末４と、２〜５ｗｔ％の酸化鉛Ｐｂ
3 Ｏ4 粉末５を加えて攪拌するようにした。尚、図中６
はドロス、７は溶融金属３の排出口を示す。FIG. 1 shows a lead alloy melting apparatus used for melting a lead alloy. In a melting vessel 2 of the illustrated lead alloy melting apparatus 1, 1 ton of a lead alloy ingot is melted. Also,
The surface of the molten metal 3 in the melting tank 2 is 2 against the lead alloy.
~ 5 wt% carbon powder 4 and 2-5 wt% lead oxide Pb
3 O 4 powder 5 was added and stirred. In the figure, 6
Is a dross, and 7 is an outlet for the molten metal 3.
【００１３】前記炭素粉末と酸化鉛Ｐｂ3 Ｏ4 粉末の添
加量と生成したドロスの量の違いを図２に示した。この
ときの溶融温度は７００℃である。図２に示すように、
添加が炭素だけの比較例および酸化鉛Ｐｂ3 Ｏ4 だけの
比較例のときにはドロス削減の効果が小さいが、両者を
同時に添加すると、特に、添加量が２．５ｗｔ％〜５ｗ
ｔ％の範囲でドロスの生成量が少なくなっていることが
明らかである。FIG. 2 shows the difference between the amount of the carbon powder and the lead oxide Pb 3 O 4 powder added and the amount of dross produced. The melting temperature at this time is 700 ° C. As shown in FIG.
Although the effect of reducing dross is small in the comparative example in which only carbon is added and the comparative example in which only lead oxide Pb 3 O 4 is added, when both are added at the same time, the addition amount is 2.5 wt% to 5 w.
It is clear that the amount of dross produced is small in the range of t%.
【００１４】一方、図３には炭素粉末と酸化鉛Ｐｂ3 Ｏ
4 粉末の４ｗｔ％同時添加時の溶融温度を変えた際のド
ロス発生量を示した。図３から明らかなようにドロス発
生量を削減するためには溶融温度を６００〜７５０℃に
保てば良いことが明らかである。On the other hand, FIG. 3 shows carbon powder and lead oxide Pb 3 O.
The amount of dross generated when the melting temperature was changed when 4 wt% of 4 powders were simultaneously added is shown. As is clear from FIG. 3, it is clear that the melting temperature should be kept at 600 to 750 ° C. in order to reduce the amount of dross generated.
【００１５】また、酸化鉛Ｐｂ3 Ｏ4 の粉末粒子が大き
い場合と小さい場合ではその効果に著しい違いがみられ
る。酸化鉛Ｐｂ3 Ｏ4 は比表面積が小さく顆粒状となる
とその添加効果は失われ、０．５ｍ2 ／ｇ以上の比表面
積が必要である。一方粒子が細かくなりすぎると溶融の
際の熱による空気対流により、表面から浮遊することが
多く、添加の効果は失われることが認められた。即ち、
酸化鉛Ｐｂ3 Ｏ4 の比表面積が０．５〜２．５ｍ2 ／ｇ
のときにドロス削減の効果が大きくなった。Further, there is a significant difference in the effect when the powder particles of lead oxide Pb 3 O 4 are large and small. Lead oxide Pb 3 O 4 has a small specific surface area and loses its addition effect when it becomes granular, and a specific surface area of 0.5 m 2 / g or more is required. On the other hand, it was confirmed that if the particles were too fine, they were often floated from the surface due to air convection due to heat during melting, and the effect of addition was lost. That is,
The specific surface area of lead oxide Pb 3 O 4 is 0.5 to 2.5 m 2 / g
At that time, the effect of reducing dross became greater.
【００１６】尚、酸化鉛粉末はＰｂ3 Ｏ4 に限定される
ものではなく、ＰｂＯなど、ＰｂＯ x （０．５＜Ｘ＜
２）で表され、上記比表面積を有するものであれば同様
の効果を得ることができた。The lead oxide powder is Pb.ThreeOFourLimited to
PbO such as PbO x(0.5 <X <
2) and the same as long as it has the above specific surface area
It was possible to obtain the effect of.
【００１７】これらの効果は、カルシウムと錫を含んだ
鉛合金において顕著で、これらの合金溶融あるいは廃電
池極板屑からの合金回収においてその効果が著しい。These effects are remarkable in the lead alloy containing calcium and tin, and the effects are remarkable in melting these alloys or recovering the alloy from the waste battery electrode plate scrap.
【００１８】[0018]
【発明の効果】上記のように、本発明によれば鉛合金イ
ンゴットの溶融あるいは廃鉛電池の極板屑からの合金回
収において、ドロスの発生を抑制し、効率良く合金の溶
融あるいは回収を行うことができる。この結果、本発明
の方法によればその工業的価値ははなはだ大きいもので
ある。As described above, according to the present invention, when a lead alloy ingot is melted or an alloy is recovered from electrode scrap of a waste lead battery, dross is suppressed and the alloy is efficiently melted or recovered. be able to. As a result, the industrial value of the method of the present invention is extremely high.
【図１】本発明を実施するための金属溶解装置の正面断
面図FIG. 1 is a front sectional view of a metal melting apparatus for carrying out the present invention.
【図２】添加物の添加条件とドロス発生量の関係を示し
た図FIG. 2 is a diagram showing the relationship between the addition condition of additives and the amount of dross generated.
【図３】溶融温度とドロス発生量の関係を示した図FIG. 3 is a diagram showing the relationship between the melting temperature and the amount of dross generated.
１ 鉛合金溶解装置 ２ 溶解釜 ３ 溶融金属 ４ 炭素粉末 ５ 酸化鉛粉末 ６ ドロス ７ 排出口 1 Lead alloy melting device 2 Melting pot 3 Molten metal 4 Carbon powder 5 Lead oxide powder 6 Dross 7 Discharge port
Claims (4)
って、溶解釜内の溶融金属表面に炭素および酸化鉛Ｐｂ
Ｏx （０．５＜Ｘ＜２）の粉末を存在させることを特徴
とする鉛合金の溶解方法。1. A method of melting a lead-calcium-tin alloy, comprising carbon and lead oxide Pb on the surface of a molten metal in a melting vessel.
A method for melting a lead alloy, characterized in that a powder of O x (0.5 <X <2) is present.
するとともに、炭素および酸化鉛ＰｂＯx （０．５＜Ｘ
＜２）の粉末を合金に対し、各々２〜５ｗｔ％存在させ
ることを特徴とする請求項１記載の鉛合金の溶解方法。2. The alloy has a melting temperature of 600 ° C. to 750 ° C. and carbon and lead oxide PbO x (0.5 <X
The method for melting a lead alloy according to claim 1, wherein the powder of <2) is present in an amount of 2 to 5 wt% with respect to the alloy.
ークス粉、黒鉛、カーボンブラック、木炭またはその他
の石炭類の何れか一種以上からなることを特徴とする請
求項１または２記載の鉛合金の溶解方法。3. The melting of the lead alloy according to claim 1, wherein the carbon powder is one or more of coke, petroleum coke, coke powder, graphite, carbon black, charcoal and other coals. Method.
が、Ｐｂ3 Ｏ4 、ＰｂＯの何れか一種以上からなり、そ
の比表面積が０．５〜２．５ｍ2 ／ｇであることを特徴
とする請求項１乃至３の何れかに記載の鉛合金の溶解方
法。4. The lead oxide PbO x (0.5 <X <2) powder is made of at least one of Pb 3 O 4 and PbO, and has a specific surface area of 0.5 to 2.5 m 2 / g. The method for melting a lead alloy according to any one of claims 1 to 3, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22878295A JPH0973924A (en) | 1995-09-06 | 1995-09-06 | Lead alloy melting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22878295A JPH0973924A (en) | 1995-09-06 | 1995-09-06 | Lead alloy melting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0973924A true JPH0973924A (en) | 1997-03-18 |
Family
ID=16881767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22878295A Pending JPH0973924A (en) | 1995-09-06 | 1995-09-06 | Lead alloy melting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0973924A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007317417A (en) * | 2006-05-24 | 2007-12-06 | Furukawa Battery Co Ltd:The | Recovering method of metallic lead |
| KR101697941B1 (en) * | 2015-11-03 | 2017-01-19 | 주식회사 아트라스비엑스 | Manufacturing method of grid for lead-acid battery |
-
1995
- 1995-09-06 JP JP22878295A patent/JPH0973924A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007317417A (en) * | 2006-05-24 | 2007-12-06 | Furukawa Battery Co Ltd:The | Recovering method of metallic lead |
| KR101697941B1 (en) * | 2015-11-03 | 2017-01-19 | 주식회사 아트라스비엑스 | Manufacturing method of grid for lead-acid battery |
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