CN105502722A - Method of treating stainless steel acid-pickling wastewater - Google Patents
Method of treating stainless steel acid-pickling wastewater Download PDFInfo
- Publication number
- CN105502722A CN105502722A CN201410491268.XA CN201410491268A CN105502722A CN 105502722 A CN105502722 A CN 105502722A CN 201410491268 A CN201410491268 A CN 201410491268A CN 105502722 A CN105502722 A CN 105502722A
- Authority
- CN
- China
- Prior art keywords
- wastewater
- stainless steel
- iron powder
- steel acid
- water
- 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
Abstract
The invention provides a method of treating stainless steel acid-pickling wastewater and relates to a treatment method of wastewater. The method includes the following steps: 1) washing iron powder in 0.05 mol/L dilute sulfuric acid for 1-2 times, washing the iron powder in deionized water, and drying the iron powder for later use; 2) adding the iron powder to the stainless steel acid-pickling wastewater, heating the wastewater in water bath, stirring and mixing the iron powder with the wastewater uniformly; and 3) filtering the wastewater through a 0.22 ym micro-pore filter membrane. In the invention, nitrates in the wastewater can be removed and meanwhile Cu<2+>, Ni<2+>, Cr<6+> and the like heavy metal ions can be removed at certain degree. The method can be widely used for recovering underground water polluted by nitrates.
Description
Technical field
The present invention relates to a kind for the treatment of process of waste water.
Background technology
Need in producing stainless steel process to carry out pickling with the nitration mixture of 90 ~ 160g/L nitric acid and 50 ~ 60g/L hydrofluoric acid.The nitric acid with strong oxidizing property by metal and metal oxide, can generate Cr
3+, Fe
3+and Ni
2+.The metallic substance taken out from pickle solution, still adheres to a small amount of pickle solution on the surface, must rinse with water, and the wash-down water of discharging thus is pickling waste waters.Containing a large amount of nitrate in pickling waste waters, the sewage work of common process effectively can not process nitrate, causes total nitrogen content in water outlet too high.If namely to the process that it carries out to a certain degree before pickling waste waters enters sewage work, the pressure of follow-up sewage work can will be reduced, makes water factory's effluent quality up to standard.
Iron chemical property is active, and abundance is cheap.It has certain specific surface area, and electronegativity is very large.Current Zero-valent Iron has been widely used in the pollution of repairing nitrate nitrogen in ground water.
Summary of the invention
The present invention aims to provide a kind of method of process stainless steel acid cleaning waste water simple to operate.
A kind of method processing stainless steel acid cleaning waste water of the present invention, comprising:
First clean iron powder 1 ~ 2 time with the dilute sulphuric acid of 0.05mol/L, use washed with de-ionized water afterwards, for subsequent use after drying; Iron powder is joined in stainless steel acid cleaning waste water, heating in water bath, be uniformly mixed, then through the filtering with microporous membrane of 0.22ym.
Preferably, the dosage of iron powder is 2.5g/L.
Or preferably, heating in water bath, to 35C, keeps constant temperature 30 minutes.
The present invention can also to Cu while nitrate in removal waste water
2+, Ni
2+, Cr
6+etc. the removal that heavy metal ion is carried out to a certain degree, the pollution of repairing nitrate in groundwater can be widely used for.
Embodiment
Embodiment one.
First clean 1 ~ 2 time with the dilute sulphuric acid of 0.05mol/L, use washed with de-ionized water afterwards, oven dry is for subsequent use afterwards to be joined in 250mL stainless steel acid cleaning waste water by 0.625g reduced iron powder, the temperature of reaction of 35 DEG C is controlled with water-bath, and keep constant temperature within 30 minutes, to make waste water and reduced iron powder fully mix and react by magnetic stirring apparatus, then through the filtering with microporous membrane of 0.22ym.Recording nitrate nitrogen clearance is 90.5%.
Claims (3)
1. process a method for stainless steel acid cleaning waste water, it is characterized in that comprising:
First clean iron powder 1 ~ 2 time with the dilute sulphuric acid of 0.05mol/L, use washed with de-ionized water afterwards, for subsequent use after drying; Iron powder is joined in stainless steel acid cleaning waste water, heating in water bath, be uniformly mixed, then through the filtering with microporous membrane of 0.22ym.
2. the method for process stainless steel acid cleaning waste water as claimed in claim 1, is characterized in that the dosage of iron powder is 2.5g/L.
3. the method for process stainless steel acid cleaning waste water as claimed in claim 1, is characterized in that heating in water bath to 35 DEG C, keeps constant temperature 30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410491268.XA CN105502722A (en) | 2014-09-23 | 2014-09-23 | Method of treating stainless steel acid-pickling wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410491268.XA CN105502722A (en) | 2014-09-23 | 2014-09-23 | Method of treating stainless steel acid-pickling wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105502722A true CN105502722A (en) | 2016-04-20 |
Family
ID=55711107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410491268.XA Pending CN105502722A (en) | 2014-09-23 | 2014-09-23 | Method of treating stainless steel acid-pickling wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105502722A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107265594A (en) * | 2017-08-08 | 2017-10-20 | 苏州吉利不锈钢制品有限公司 | A kind of stainless steel acid cleaning waste water flocculant |
| CN107285447A (en) * | 2017-08-08 | 2017-10-24 | 苏州吉利不锈钢制品有限公司 | A kind of stainless steel acid cleaning waste water biological flocculant and preparation method thereof |
| CN108328826A (en) * | 2017-01-20 | 2018-07-27 | 宝山钢铁股份有限公司 | A kind of method of cold-rolling pickling wastewater recycling |
| CN109928438A (en) * | 2019-04-01 | 2019-06-25 | 陕西蕴德环保科技有限公司 | A kind of iron series water quality cleansing agent production catalyst removal of nitrogen oxide method |
-
2014
- 2014-09-23 CN CN201410491268.XA patent/CN105502722A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108328826A (en) * | 2017-01-20 | 2018-07-27 | 宝山钢铁股份有限公司 | A kind of method of cold-rolling pickling wastewater recycling |
| CN107265594A (en) * | 2017-08-08 | 2017-10-20 | 苏州吉利不锈钢制品有限公司 | A kind of stainless steel acid cleaning waste water flocculant |
| CN107285447A (en) * | 2017-08-08 | 2017-10-24 | 苏州吉利不锈钢制品有限公司 | A kind of stainless steel acid cleaning waste water biological flocculant and preparation method thereof |
| CN109928438A (en) * | 2019-04-01 | 2019-06-25 | 陕西蕴德环保科技有限公司 | A kind of iron series water quality cleansing agent production catalyst removal of nitrogen oxide method |
| CN109928438B (en) * | 2019-04-01 | 2021-12-17 | 陕西科技大学 | Method for removing nitrogen oxides in catalyst produced by iron-based water purifying agent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105018948B (en) | A kind of 304 austenitic stainless steel acid washing method of hot rolling | |
| CN105502722A (en) | Method of treating stainless steel acid-pickling wastewater | |
| An et al. | Zero-valent iron/activated carbon microelectrolysis to activate peroxydisulfate for efficient degradation of chlortetracycline in aqueous solution | |
| CN104498974B (en) | A kind of method that mixed acid is reclaimed in the pickle liquor from cold-rolling stainless steel | |
| CN104512974A (en) | Method for deeply removing persistent organic pollutants and heavy metal in water body | |
| CN103523957A (en) | Treatment method of stainless steel pickling wastewater | |
| CN103896464B (en) | A kind of trade effluent materializing strategy agent and application thereof | |
| CN103496777B (en) | Pretreatment method of ammonia-nitrogen wastewater | |
| WO2018036752A1 (en) | Method for preparing a nano mgo activated carbon for adsorbing heavy metals | |
| WO2017080164A1 (en) | Electroplating waste water processing process | |
| CN105439209B (en) | Method for preparing ozone oxidation catalyst gamma-FeOOH after neutralization of waste acid by using nickel laterite ores | |
| CN103693729B (en) | Treatment method for nitric-acid-containing wastewater in adipic acid production technology | |
| CN102951719B (en) | Method for treating nitrobenzene wastewater by utilizing pyrrhotite fixed bed | |
| CN104310508B (en) | A kind of waste water treating agent | |
| CN104355444A (en) | Treatment method of complexing heavy metal wastewater | |
| CN105671572A (en) | Steel pickling solution recycling device and process based on Fenton oxidization | |
| US9908112B2 (en) | Regeneration of an ion exchange column | |
| RU2016115927A (en) | The method of surface treatment of aluminum cans | |
| JP2015158486A5 (en) | ||
| US7399366B1 (en) | Product and processes for preventing the occurrence of rust stains resulting from irrigation systems using water containing iron ions and for cleaning off rust stains resulting from using said irrigation systems | |
| CN205635149U (en) | Stainless steel pickling waste waters / waste liquid resourceful treatment system | |
| CN104949570B (en) | The cleaning method of boiler | |
| CN106745951A (en) | A kind of production wastewater treatment method of ADC foaming agents | |
| CN114853109A (en) | Deep defluorination medicament and preparation method and use method thereof | |
| CN108147503A (en) | Manganese oxide electrode, preparation method and the usage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160420 |