JPH0466638B2 - - Google Patents
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- Publication number
- JPH0466638B2 JPH0466638B2 JP21137488A JP21137488A JPH0466638B2 JP H0466638 B2 JPH0466638 B2 JP H0466638B2 JP 21137488 A JP21137488 A JP 21137488A JP 21137488 A JP21137488 A JP 21137488A JP H0466638 B2 JPH0466638 B2 JP H0466638B2
- Authority
- JP
- Japan
- Prior art keywords
- waste liquid
- plating
- iron alloy
- zinc
- hydrogen peroxide
- 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.)
- Expired
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Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、亜鉛−鉄合金電気メツキ廃液処理方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for treating zinc-iron alloy electroplating waste liquid.
（従来の技術）
亜鉛−鉄合金電気メツキ廃液処理法としては、
例えば特開昭62−221491号公報に開示されている
ごとく、上記のごときメツキ廃液と過酸化水素と
接触して反応せしめ、高粘度化を抑制した後中和
することが知られている。(Conventional technology) As a method for treating zinc-iron alloy electroplating waste liquid,
For example, as disclosed in Japanese Patent Application Laid-Open No. 62-221491, it is known that the plating waste liquid as described above is brought into contact with hydrogen peroxide to cause a reaction, suppressing increase in viscosity, and then neutralizing the liquid.
（発明が解決しようとする課題）
ところで上記のごとき電気メツキにおいては、
メツキ後、又は複層メツキの場合はそれぞれのメ
ツキ後水洗し、メツキ液を洗い落すことが行なわ
れ、この洗滌廃液は、上記メツキ廃液に比べメツ
キ液濃度が低いことから、別途廃液処理を施すこ
とがなされていた。従つて廃棄処理が複雑にな
り、設備的にも操業的にもコストが高くなる等の
欠点をともなうものである。(Problem to be solved by the invention) By the way, in the above electroplating,
After plating, or after each plating in the case of multi-layer plating, the plating solution is washed off with water.This washing waste liquid has a lower plating solution concentration than the above plating waste liquid, so it is treated separately as waste liquid. Things were being done. Therefore, the disposal process becomes complicated, and there are drawbacks such as increased costs in terms of equipment and operation.
本発明はかかる欠点を有利に解決するためなさ
れた廃液処理方法である。 The present invention is a waste liquid treatment method that has been devised to advantageously solve these drawbacks.
（課題を解決するための手段）
本発明の特徴とするところは、亜鉛−鉄合金電
気メツキ廃液に過酸化水素（H2O2）を添加して
攪拌し、次いでメツキ鋼板洗滌廃液と混合した後
中和することを特徴とする亜鉛−鉄合金電気メツ
キ廃液処理方法である。(Means for Solving the Problems) The present invention is characterized in that hydrogen peroxide (H 2 O 2 ) is added to zinc-iron alloy electroplating waste liquid and stirred, and then mixed with plating steel plate cleaning waste liquid. This is a method for treating zinc-iron alloy electroplating waste liquid, which is characterized by post-neutralization.
（作用）
即ち本発明においては、上記のごとくメツキ廃
液とメツキ鋼板の洗滌廃液を同時処理するもので
あり、上記メツキ廃液としては、メツキ層中の亜
鉛−鉄濃度により異なるが、例えばFe3+：６〜
８ｇ／、Fe2+：約80ｇ／、Zn：約40ｇ／、
Cr：約100mg／、Pb：１〜２mg／、Sn：１
〜２mg／、SO4：約200ｇ／、PH約1.0のメツ
キ廃液が一般的なものである。又メツキ洗滌廃液
としては、例えばFe3+：15〜20mg／、Fe2+：
約0.2ｇ／、Zn：約0.1ｇ／、Cr、Pb、Snは
ほとんどなし、SO4：約500mg／、PH約２〜３
が一般的である。(Function) That is, in the present invention, the plating waste liquid and the washing waste liquid of the plated steel sheets are simultaneously treated as described above, and the plating waste liquid may contain, for example, Fe 3+ :6~
8g/, Fe 2+ : approx. 80g/, Zn: approx. 40g/,
Cr: approx. 100mg/, Pb: 1-2mg/, Sn: 1
~2mg/, SO 4 :about 200g/, and a pH of about 1.0, is a typical waste liquid. In addition, as the waste water for washing, for example, Fe 3+ : 15 to 20 mg/, Fe 2+ :
Approx. 0.2g/, Zn: approx. 0.1g/, almost no Cr, Pb, Sn, SO 4 : approx. 500mg/, PH approx. 2-3
is common.
しかして、上記のごときメツキ廃液に過酸化水
素（H2O2）を添加すると、
2FeSO4＋H2O＋H2SO4→Fe2（SO4）3＋2H2O
の反応によつてFe2+→Fe3+に酸化して、中和処
理を可能にするものである。 Therefore , when hydrogen peroxide (H 2 O 2 ) is added to the plating waste liquid as described above, Fe 2+ → becomes It oxidizes to Fe 3+ and enables neutralization treatment.
過酸化水素は、単にメツキ廃液に添加するだけ
では十分反応しないので、例えば螺線状の邪魔板
を配置した管内を通過させること等により、十分
攪拌させることが重要である。 Since hydrogen peroxide does not react sufficiently when simply added to the plating waste liquid, it is important to sufficiently stir it, for example by passing it through a pipe equipped with a spiral baffle plate.
次にこのようにして酸化処理したメツキ廃液
と、前記したメツキ鋼板洗滌廃液とを混合して、
これを例えば消石灰（Ca（OH）2）等と接触させ
てPH７〜８に調整し、廃棄するものである。 Next, the oxidized plating waste liquid and the above-mentioned plating steel plate washing waste liquid are mixed,
This is brought into contact with, for example, slaked lime (Ca(OH) 2 ), etc. to adjust the pH to 7 to 8, and then discarded.
メツキ廃液と洗滌廃液とを混合した後過酸化水
素と接触させると、Fe2+の濃度が低下しており、
反応効率が劣り、連続処理が困難になるので、上
記のごとくメツキ廃液の酸化処理後洗滌廃液と混
合するものである。 When the waste water from plating and the waste water from washing are mixed and brought into contact with hydrogen peroxide, the concentration of Fe 2+ decreases.
Since the reaction efficiency is poor and continuous treatment becomes difficult, as mentioned above, the plating waste liquid is oxidized and then mixed with the washing waste liquid.
洗滌液にもFe2+が若干含まれているが、消石
灰等によりPH７〜８に調整する際同時に行なわれ
る空気曝気により、空気中の酸素と反応して
Fe3+に酸化される。 The cleaning solution also contains a small amount of Fe 2+ , but it reacts with oxygen in the air due to the air aeration that is carried out at the same time when adjusting the pH to 7-8 using slaked lime, etc.
Oxidized to Fe 3+ .
（実施例） 次に本発明の実施例について説明する。(Example) Next, examples of the present invention will be described.
メツキ廃液（Fe3+：6.5ｇ／、Fe2+：78ｇ／
、Zn：41ｇ／、Cr：80mg／、Pb：２mg／
、Sn：1.5mg／、SO4：181ｇ／、PH1.0）
1.0m3／Hrを攪拌器へ導入する直前に、過酸化水
素（35％水溶液）を40／Hr添加し、攪拌器で
十分攪拌して酸化処理を施こし、Fe3+：32.5ｇ／
、Fe2+：52ｇ／、Zn：41ｇ／、Cr：80
mg／、Pb：２mg／、Sn：1.5mg／、SO4：
181ｇ／、PH1.0に調整した後、メツキ鋼板洗滌
廃液（Fe3+：17mg／、Fe2+：0.2ｇ／、Zn：
0.08ｇ／、Cr、Pb、Snはほとんどなし、PH
3.0）87m3／Hrと混合し、中和工程へ導いた。 Metsuki waste liquid (Fe 3+ : 6.5g/, Fe 2+ : 78g/
, Zn: 41g/, Cr: 80mg/, Pb: 2mg/
, Sn: 1.5mg/, SO 4 : 181g/, PH1.0)
Immediately before introducing 1.0 m 3 /Hr into the stirrer, 40/Hr of hydrogen peroxide (35% aqueous solution) was added and thoroughly stirred with the stirrer to perform oxidation treatment, and Fe 3+ :32.5g/Hr was added.
, Fe 2+ : 52g/, Zn: 41g/, Cr: 80
mg/, Pb: 2 mg/, Sn: 1.5 mg/, SO 4 :
181g/, after adjusting to PH1.0, plating steel plate cleaning waste liquid (Fe 3+ : 17mg/, Fe 2+ : 0.2g/, Zn:
0.08g/, almost no Cr, Pb, Sn, PH
3.0) 87m 3 /Hr and led to the neutralization process.
（発明の効果）
本発明によれば、亜鉛−鉄合金電気メツキのメ
ツキ廃液と洗滌廃液とを同時に中和処理すること
ができ、処理設備の小型化を図ることができると
ともに、操業コストも低下させることができる等
の優れた効果が得られる。(Effects of the Invention) According to the present invention, plating waste liquid and washing waste liquid of zinc-iron alloy electroplating can be neutralized at the same time, making it possible to downsize the processing equipment and reducing operating costs. Excellent effects can be obtained, such as the ability to
Claims (1)
（H2O2）を添加して攪拌し、次いでメツキ鋼板洗
滌廃液と混合した後中和することを特徴とする亜
鉛−鉄合金電気メツキ廃液処理方法。1 Zinc-iron alloy electroplating waste liquid treatment characterized by adding hydrogen peroxide (H 2 O 2 ) to zinc-iron alloy electroplating waste liquid, stirring it, and then neutralizing after mixing with plating steel plate washing waste liquid Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21137488A JPH0259093A (en) | 1988-08-25 | 1988-08-25 | Treatment of zinc-iron alloy electroplating waste solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21137488A JPH0259093A (en) | 1988-08-25 | 1988-08-25 | Treatment of zinc-iron alloy electroplating waste solution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0259093A JPH0259093A (en) | 1990-02-28 |
| JPH0466638B2 true JPH0466638B2 (en) | 1992-10-23 |
Family
ID=16604904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21137488A Granted JPH0259093A (en) | 1988-08-25 | 1988-08-25 | Treatment of zinc-iron alloy electroplating waste solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0259093A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2573111B2 (en) * | 1990-09-12 | 1997-01-22 | 花王 株式会社 | Composition for working fluid of refrigerator |
| JP2007332985A (en) * | 2006-06-12 | 2007-12-27 | Oppama Kogyo Kk | Member connection structure |
| JP5512482B2 (en) * | 2010-10-08 | 2014-06-04 | Ｊｆｅエンジニアリング株式会社 | Method for separating and recovering zinc from galvanizing waste liquid |
| CN104891633A (en) * | 2015-06-24 | 2015-09-09 | 彭双全 | XY efficient water treatment agent |
| CN113198475B (en) * | 2021-04-29 | 2023-04-25 | 清创人和生态工程技术有限公司 | Preparation method and application of ferroalloy catalyst |
-
1988
- 1988-08-25 JP JP21137488A patent/JPH0259093A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0259093A (en) | 1990-02-28 |
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