JP5280904B2 - Electrolysis method of lead (5) - Google Patents
Electrolysis method of lead (5) Download PDFInfo
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- JP5280904B2 JP5280904B2 JP2009070066A JP2009070066A JP5280904B2 JP 5280904 B2 JP5280904 B2 JP 5280904B2 JP 2009070066 A JP2009070066 A JP 2009070066A JP 2009070066 A JP2009070066 A JP 2009070066A JP 5280904 B2 JP5280904 B2 JP 5280904B2
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Description
本発明は、非鉄製錬、基盤や電子部品などリサイクル原料の溶融炉、及び産業廃棄物を溶融処理する乾式炉より発生する乾式煙灰中に含まれているPbを回収する方法に関する。 The present invention relates to a method for recovering Pb contained in non-ferrous smelting, a melting furnace for recycling raw materials such as bases and electronic components, and dry smoke ash generated from a dry furnace for melting industrial waste.
非鉄製錬、基盤や電子部品などリサイクル原料の溶融炉、及び産業廃棄物を溶融処理する乾式炉より非鉄製錬の乾式煙灰中に含まれているPbを回収するため、煙灰を硫酸浸出し、硫酸鉛にした後、電気炉で溶融還元を行う。溶融還元により分離されたメタルをソーダ処理し、その後、メタルをアノード鋳造した後、珪フッ素酸浴中にて電解精製することでPbを回収している。
特許文献1に関しては、高Bi品位のアノードに対して、スルファミン酸浴により高純度の電着鉛を回収している。
In order to recover Pb contained in non-ferrous smelting dry ash from non-ferrous smelting, furnaces for recycling raw materials such as bases and electronic parts, and dry furnaces for melting industrial waste, fumes are leached with sulfuric acid. After changing to lead sulfate, smelting reduction is performed in an electric furnace. The metal separated by smelting is treated with soda, and then the metal is anode cast, and then Pb is recovered by electrolytic purification in a silicofluoric acid bath.
With respect to Patent Document 1, high purity electrodeposited lead is recovered by a sulfamic acid bath for a high Bi grade anode.
特許文献１において、最適な電流密度として、５０Ａ／ｍ 2 以下としている。しかし、鉛の回収量を増加するためには、電槽の槽数を増加するなど設備投資をする必要があることから、更に最適な電流密度を上げることが望まれる。
従来の技術に対して、高Bi品位のアノードに対しても高純度の鉛を回収することができる鉛の電解方法を提供することを目的とする。 An object of the present invention is to provide a lead electrolysis method capable of recovering high-purity lead even for a high-Bi grade anode with respect to the prior art.
本発明者等は、上記の課題を解決するため以下の発明を成した。
（１）Bi品位5から30 mass％の高不純物アノードにアンチモン品位が1〜3 mass％になるように調整した後、電解処理し、高純度の鉛を回収することができる鉛の電解方法。
The present inventors made the following invention in order to solve the above-mentioned problems.
(1) A lead electrolysis method capable of recovering high-purity lead by performing an electrolytic treatment after adjusting a high impurity anode of Bi grade 5 to 30 mass% to an antimony grade of 1 to 3 mass%.
（２）上記（１）記載の電解処理が、電流密度１００Ａ／ｍ 2 以下で通電する鉛の電解方法。 (2) A method for electrolyzing lead in which the electrolytic treatment described in (1) is energized at a current density of 100 A / m 2 or less.
本発明によれば、高Bi品位の鉛アノードから効率よく、更に設備投資することなく、Bi品位が極めて低い高純度の鉛を回収することができることを特徴とする鉛の電解方法を見出した。 According to the present invention, a lead electrolysis method characterized in that high-purity lead with extremely low Bi quality can be recovered efficiently from a high Bi quality lead anode without further capital investment.
以下に本発明をさらに詳細に説明する。
原料は、本発明の鉛含有物は、鉛：70〜90mass％、錫：0.04mass％、ビスマス：5〜30mass％含有する。
The present invention is described in further detail below.
As the raw material, the lead-containing material of the present invention contains lead: 70 to 90 mass%, tin: 0.04 mass%, and bismuth: 5 to 30 mass%.
例えば、上記鉛含有物を、アノード鋳造をし、そのアノードを用いて電解精製を行う。アノードのサイズとしては、カソードのサイズに比べ小さくすることで、エッジ効果を防ぐことができ、平滑で良好な電着鉛を回収することができる。 For example, the lead-containing material is subjected to anode casting, and electrolytic purification is performed using the anode. By making the anode size smaller than the cathode size, the edge effect can be prevented, and smooth and good electrodeposited lead can be recovered.
電解液として、スルファミン酸の濃度は、２０〜１００ｇ／Ｌ、鉛濃度は、２０〜１００ｇ／Ｌが最適である。更に平滑剤としては、ノイゲン（登録商標）ＢＮ−１３９０、または、ノイゲン（登録商標）ＢＮ−２５７０を１〜１０ｍｇ／Ｌで、電流密度を１００Ａ／ｍ 2 以下で通電することで、平滑で良好な電着鉛を回収することができる。 As an electrolytic solution, the concentration of sulfamic acid is optimally 20 to 100 g / L, and the lead concentration is optimally 20 to 100 g / L. Furthermore, as a smoothing agent, Neugen (registered trademark) BN-1390 or Neugen (registered trademark) BN-25 70 is applied at 1 to 10 mg / L, and the current density is 100 A / m 2 or less, thereby smoothing. Good electrodeposited lead can be recovered.
次にアノード中のBi品位が21％に対して、アノード中のアンチモン品位と電着鉛中のBi品位の関係を確認した結果、図1に示す通り、アノード中のアンチモン品位が1〜3％になるように調整後、通電処理することで、低Bi品位の電着鉛を回収することができる。
３mass％より多く添加した場合、殿物が硬く、厚い層ができるため、アノード電位が上昇し、不純物が溶出する恐れがある。
Next, as a result of confirming the relationship between the antimony grade in the anode and the Bi grade in the electrodeposited lead, while the Bi grade in the anode was 21%, the antimony grade in the anode was 1-3% as shown in FIG. By adjusting the power so as to be, it is possible to recover the electrodeposited lead of low Bi quality by conducting the energization treatment.
When added in an amount of more than 3 mass%, the porcelain is hard and a thick layer is formed, so that the anode potential rises and impurities may be eluted.
（実施例１） 低Ｂｉ品位の電着鉛を回収する方法
高Ｂｉ品位の鉛原料（２０ｍａｓｓ％Ｂｉ含有）にアンチモン品位が２％になるように調整後、アノードを鋳造する。そのアノードとカソードとして、ステンレス板を交互に電槽に装入する。カソードの大きさは、アノードに対して、２０〜３０ｍｍ程度大きくした方が、エッジ部への電流集中を緩和することができ、最適である。
電解液の組成として、鉛濃度：８０ｇ／Ｌ、スルファミン酸濃度：２０ｇ／Ｌに調整した溶液に平滑剤としてノイゲン（登録商標）ＢＮ−１３９０を１０ｍｇ／Ｌになるように添加する。
電極装入後、電槽内に電解液を補充し、電解液の電槽内滞留時間が１ｈ程度になるように給液することで、電槽内の濃度分布を均等にする。
電解液の液温を、２０〜３０℃に調整後、電流密度を１００Ａ／ｍ 2 で通電することで、低Ｂｉ品位が、１０ｍａｓｓｐｐｍ以下の電着鉛を回収することができる。
(Example 1) Method of recovering low Bi grade electrodeposited lead After adjusting the high Bi grade lead raw material (containing 20 mass% Bi) to an antimony grade of 2%, the anode is cast. As the anode and cathode, stainless steel plates are alternately charged into the battery case. It is optimal that the size of the cathode is increased by about 20 to 30 mm with respect to the anode because current concentration on the edge portion can be reduced.
As a composition of the electrolytic solution, Neugen (registered trademark) BN-1390 is added as a smoothing agent to a solution adjusted to lead concentration: 80 g / L and sulfamic acid concentration: 20 g / L so as to be 10 mg / L.
After the electrode is charged, the electrolytic solution is replenished in the battery case, and the concentration distribution in the battery case is made uniform by supplying the electrolyte solution so that the residence time of the electrolytic solution in the battery case is about 1 h.
After adjusting the liquid temperature of the electrolytic solution to 20 to 30 ° C., the electrodeposited lead having a low Bi quality of 10 mas sp pm or less can be recovered by supplying current at a current density of 100 A / m 2 .
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| JP5514747B2 (en) * | 2011-01-07 | 2014-06-04 | Ｊｘ日鉱日石金属株式会社 | Electric lead manufacturing method |
| KR101448341B1 (en) * | 2012-03-19 | 2014-10-07 | 제이엑스 닛코 닛세키 킨조쿠 가부시키가이샤 | Manufacturing method for electrolytic lead |
| CN103361490B (en) * | 2012-03-30 | 2016-02-24 | 吉坤日矿日石金属株式会社 | The manufacture method that electricity is plumbous |
| CN102925921B (en) * | 2012-09-07 | 2015-09-16 | 昆明理工大学 | A kind of method strengthening Top-blown Lead Smelting |
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