CN1844073A - Method for reusing waste hydrochloric acid used in acid washing of iron and steel industry and reclaiming ferrous oxalate therefrom - Google Patents
Method for reusing waste hydrochloric acid used in acid washing of iron and steel industry and reclaiming ferrous oxalate therefrom Download PDFInfo
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- CN1844073A CN1844073A CN 200610013330 CN200610013330A CN1844073A CN 1844073 A CN1844073 A CN 1844073A CN 200610013330 CN200610013330 CN 200610013330 CN 200610013330 A CN200610013330 A CN 200610013330A CN 1844073 A CN1844073 A CN 1844073A
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- acid
- hydrochloric acid
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- iron
- ferrous oxalate
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The method of steel manufacture acid cleaning discarded hydrochloric acid reactivation use and recover ferrous oxalate. The course is as follows: filtering the foreign matter in devil liquor of steel manufacture acid cleaning discarded hydrochloric acid by acid-resisting chain cloth, collecting filter liquor for standby. Heating industrial oxalic acid to dissolve by pure water, calculating the consumption of oxalic acid by content of anhydrous ferric chloride in spend acid, filtration in hot when dissolution finished, mixing and agitating the filtrate and filted discarded acidum hydrochloricum by the proportion of waste acid oxalic acid 3:1 quickly to the solution become yellow. Absolute-rest precipitation for 2h, aspirating upper supernatant by acid-resisting pump and getting low-rank hydrochloric acid of acidity 12-15%(in HCl terms). In accordance with requested concentration of acid cleaning technique, adding and supplying to needed concentration for use again. Washing precipitate by water to ph=7, centrifugal nseparating, drying in 100-120deg C by flashing artificial drier and getting ferrous oxalate product.
Description
Steel hydrochloric acid pickling waste liquid and acid-bearing wastewater, all the time by country order for dangerous pollutant forbid the discharging.Iron and steel processing enterprise uses the hydrochloric acid cleaning steel surface, because the too low value that does not have recycling of the content of iron in the hydrochloric acid, as it is too big to adopt evaporation and concentration to exist the too high equipment investment of disposal cost, so current discarded hydrochloric acid and acid-bearing wastewater are the problems of a headache of iron and steel processing industry, in order to solve this difficult problem, the present invention designs the discarded regeneration of hydrochloric acid utilization of a kind of steel and iron industry pickling and reclaims the method for ferrous oxalate.
Its process simply is described below: with the discarded acidproof filter cloth of hydrochloric acid of Iron And Steel Industry pickling, filter the impurity of removing in the waste liquid and collect filtrate for later use.With industrial ethanedioic acid pure water heating for dissolving, according to the consumption of the cubage oxalic acid of iron chloride in the spent acid, wait to dissolve and completely filter while hot, with filtrate with filter after discarded hydrochloric acid with, spent acid.The following mixing of 3: 1 ratio of oxalic acid stirring is stirred to solution fast and is yellow.Quiescent setting 2 hours is drawn the low hydrochloric acid that supernatant liquid gets 12-15% acidity (in hydrogenchloride) with acid proof pump.Reuse after requiring concentration to add again to be supplemented to desired concn according to acid cleaning process.Sediment washed to pH value=7 usefulness centrifugations with clear water under the 100-120 degree, get the ferrous oxalate product with flash dryer.
Claims (3)
1. the discarded regeneration of hydrochloric acid utilization of a steel and iron industry pickling and reclaim the method for ferrous oxalate.It is characterized in that:, filter the impurity of removing in the waste liquid and collect filtrate for later use the discarded acidproof filter cloth of hydrochloric acid of Iron And Steel Industry pickling.With industrial ethanedioic acid pure water heating for dissolving, according to the consumption of the cubage oxalic acid of iron chloride in the spent acid, wait to dissolve and completely filter while hot, with filtrate with filter after discarded hydrochloric acid with, spent acid.3: 1 ratio of oxalic acid stirs down mixes, and is stirred to solution fast and is yellow.Quiescent setting 2 hours is drawn the low hydrochloric acid that supernatant liquid gets 12-15% acidity (in hydrogenchloride) with acid proof pump.Reuse after requiring concentration to add again to be supplemented to desired concn according to acid cleaning process.Sediment washed to pH value=7 usefulness centrifugations with clear water under the 100-120 degree, get the ferrous oxalate product with flash dryer.
2. it is characterized in that according to the described production method of claim 1., utilize the discarded hydrochloric acid of Iron And Steel Industry pickling, reclaim Ferrox with oxalic acid precipitate reduction regeneration hydrochloric acid.
3. it is characterized in that according to the described production method of claim 1. that the ratio of discarded hydrochloric acid and oxalic acid is 3: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610013330 CN1844073A (en) | 2006-03-20 | 2006-03-20 | Method for reusing waste hydrochloric acid used in acid washing of iron and steel industry and reclaiming ferrous oxalate therefrom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610013330 CN1844073A (en) | 2006-03-20 | 2006-03-20 | Method for reusing waste hydrochloric acid used in acid washing of iron and steel industry and reclaiming ferrous oxalate therefrom |
Publications (1)
| Publication Number | Publication Date |
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| CN1844073A true CN1844073A (en) | 2006-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610013330 Pending CN1844073A (en) | 2006-03-20 | 2006-03-20 | Method for reusing waste hydrochloric acid used in acid washing of iron and steel industry and reclaiming ferrous oxalate therefrom |
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| CN (1) | CN1844073A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070436A (en) * | 2009-11-25 | 2011-05-25 | 苏州超联光电有限公司 | Method for recovering oxalate and acid liquor from acidic etching waste liquor |
| CN102625777A (en) * | 2009-09-10 | 2012-08-01 | 绿色未来有限公司 | Galvanic waste sludge treatment and manufacturing of nano-sized iron oxides |
| CN102674643A (en) * | 2011-03-16 | 2012-09-19 | 北京化工大学 | Method for recovering ferric oxide from red mud by leaching-photocatalysis by oxalic acid |
| CN105218347A (en) * | 2015-09-08 | 2016-01-06 | 厦门紫金矿冶技术有限公司 | A kind of copper raffinate prepares the method for high-purity oxalic acid ferrous iron |
| CN105732359A (en) * | 2016-04-18 | 2016-07-06 | 昆明理工大学 | Method for preparing cell grade ferrous oxalate with steel acid pickling waste liquor |
| CN106086914A (en) * | 2016-08-25 | 2016-11-09 | 天津市润杰创新环保科技股份公司 | Online hydrochloric acid circulation utilization method on acid washing rolled steel line and device thereof |
| CN106145038A (en) * | 2016-08-25 | 2016-11-23 | 天津市润杰创新环保科技股份公司 | Spent acid is utilized to prepare method and the equipment thereof of regenerated acid |
| CN107523836A (en) * | 2017-08-25 | 2017-12-29 | 中冶建筑研究总院有限公司 | A kind of steel acidleach wash after Waste Sulfuric Acid and waste hydrochloric acid mixed liquor recoverying and utilizing method |
| CN107747101A (en) * | 2017-10-09 | 2018-03-02 | 中国科学院过程工程研究所 | A kind of processing method of stainless steel washing spent acid |
| CN112340918A (en) * | 2020-11-11 | 2021-02-09 | 山东云水环保科技有限公司 | Method for recycling steel pickling rust removal waste liquid |
-
2006
- 2006-03-20 CN CN 200610013330 patent/CN1844073A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625777A (en) * | 2009-09-10 | 2012-08-01 | 绿色未来有限公司 | Galvanic waste sludge treatment and manufacturing of nano-sized iron oxides |
| CN102625777B (en) * | 2009-09-10 | 2015-09-09 | 绿色未来有限公司 | The manufacture of electroplating sludge process and nano-level iron oxide compound |
| CN102070436A (en) * | 2009-11-25 | 2011-05-25 | 苏州超联光电有限公司 | Method for recovering oxalate and acid liquor from acidic etching waste liquor |
| CN102674643A (en) * | 2011-03-16 | 2012-09-19 | 北京化工大学 | Method for recovering ferric oxide from red mud by leaching-photocatalysis by oxalic acid |
| CN105218347A (en) * | 2015-09-08 | 2016-01-06 | 厦门紫金矿冶技术有限公司 | A kind of copper raffinate prepares the method for high-purity oxalic acid ferrous iron |
| CN105732359B (en) * | 2016-04-18 | 2017-11-28 | 昆明理工大学 | A kind of method that battery level iron oxalate is prepared using iron and steel pickling waste liquid |
| CN105732359A (en) * | 2016-04-18 | 2016-07-06 | 昆明理工大学 | Method for preparing cell grade ferrous oxalate with steel acid pickling waste liquor |
| CN106086914A (en) * | 2016-08-25 | 2016-11-09 | 天津市润杰创新环保科技股份公司 | Online hydrochloric acid circulation utilization method on acid washing rolled steel line and device thereof |
| CN106145038A (en) * | 2016-08-25 | 2016-11-23 | 天津市润杰创新环保科技股份公司 | Spent acid is utilized to prepare method and the equipment thereof of regenerated acid |
| CN106086914B (en) * | 2016-08-25 | 2019-06-14 | 天津市润杰创新环保科技股份公司 | Online hydrochloric acid circulation utilization method and its device on acid washing rolled steel line |
| CN107523836A (en) * | 2017-08-25 | 2017-12-29 | 中冶建筑研究总院有限公司 | A kind of steel acidleach wash after Waste Sulfuric Acid and waste hydrochloric acid mixed liquor recoverying and utilizing method |
| CN107523836B (en) * | 2017-08-25 | 2018-11-30 | 中冶建筑研究总院有限公司 | A kind of steel acidleach wash after Waste Sulfuric Acid and waste hydrochloric acid mixed liquor recoverying and utilizing method |
| CN107747101A (en) * | 2017-10-09 | 2018-03-02 | 中国科学院过程工程研究所 | A kind of processing method of stainless steel washing spent acid |
| CN107747101B (en) * | 2017-10-09 | 2020-01-31 | 中国科学院过程工程研究所 | Treatment method of stainless steel washing waste acid |
| CN112340918A (en) * | 2020-11-11 | 2021-02-09 | 山东云水环保科技有限公司 | Method for recycling steel pickling rust removal waste liquid |
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |