CN102295340A - Method for processing wastewater containing Cr<6+> - Google Patents
Method for processing wastewater containing Cr<6+> Download PDFInfo
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- CN102295340A CN102295340A CN 201110211043 CN201110211043A CN102295340A CN 102295340 A CN102295340 A CN 102295340A CN 201110211043 CN201110211043 CN 201110211043 CN 201110211043 A CN201110211043 A CN 201110211043A CN 102295340 A CN102295340 A CN 102295340A
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- Prior art keywords
- cinder
- furnace slag
- waste water
- wastewater containing
- blast
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- Processing Of Solid Wastes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to a method for processing wastewater containing Cr<6+>, which is suitable for all fields of processing wastewater containing Cr<6+> and is especially suitable for processing industrial wastewater containing Cr<6+>. The method comprises the following steps: 1, mixing blast furnace slag with cinder, putting them in a pulverizer for pulverizing to obtain a mixture of the blast furnace slag and the cinder; and 2, putting the wastewater containing Cr<6+> in a centrifugal device with a constant temperature oscillator, adding the mixture of the blast furnace slag and the cinder, starting the constant temperature oscillator, oscillating, and centrifuging, wherein a supernatant is treated as qualified water which is discharged for reuse, a sediment is treated as the mixture of the blast furnace slag and the cinder, and chromium hydroxide generated in a reaction is treated as a raw material for producing slag cements. The method of the present invention has the advantages of low cost, Cr<6+> removal rate of more than 99%, utilization of deserted resources, and simple operation.
Description
Technical field
The present invention relates to a kind of method of handling cr6 +-containing waste water, be applicable to all areas that cr6 +-containing waste water is handled, be specially adapted to processing and contain the Cr6+ trade effluent.
Background technology
Chromium (Cr) and compound thereof are in industrial widespread use, some industries such as mining smelting, chemical industry, plating, process hides, printing and dyeing, pharmacy, papermaking all can produce a large amount of chromate waste waters, especially Cr6+ has strong toxicity, its toxicity exceeds 100 times than Cr3+, easier being absorbed by the body of Cr6+ and accumulating in vivo, be a kind of carcinogenic substance, if the not treated nature that directly enters can produce serious harm to environment and human health.
The improvement technology of chromate waste water is of a great variety, cut both ways, the treatment process of cr6 +-containing waste water mainly contains chemical reduction method, ion exchange method, chemical precipitation method, extraction process and absorption method at present, and domestic processing waste water containing chrome is used chemical reduction method more than 90%, but this method need consume a large amount of chemical agents, not only processing cost is higher, and causes secondary pollution easily; Ion exchange method need be carried out frequent regeneration to ion-exchanger, and complicated operation and processing cost are higher.
Summary of the invention
In order to overcome the shortcoming of prior art, the invention provides a kind of method of handling cr6 +-containing waste water, not only cost is low, and the Cr6+ clearance reaches more than 99%, and utilizes waste resource, and is easy and simple to handle.
The present invention solves the technical scheme that its technical problem takes: comprise the following steps: 1), be that the blast-furnace slag of 85-90% and the cinder of 10-15% mix with weight percent, put into pulverizer and pulverize, getting particle diameter is 0.2-0.9mm blast-furnace slag and cinder mixture; 2), the cr6 +-containing waste water of 8-10m3 is put into the centrifugal device that has constant temperature oscillator, the described blast-furnace slag and the cinder mixture that add 1500-2000kg, start constant temperature oscillator, vibration 100-150min, centrifugation, supernatant liquid is qualified water, discharge re-uses, throw out is the chromium hydroxide of blast-furnace slag and cinder mixture and reaction generation, as the raw material of operating mine slag cement.
The pH value of described cr6 +-containing waste water is 3-5, when nonconforming, regulates with liming.
Advantage of the present invention is: 1, slag had both played adsorption and had also played neutralizing effect when handling this class waste water.Slag and cinder can " be turned waste into wealth " again as the industrial production waste material, have use value and good social benefit preferably.2, not only low, the Cr6+ clearance of cost reaches more than 99%, and utilizes waste resource, easy and simple to handle.
Embodiment
The present invention includes the following step: 1), be that the cinder of 90% blast-furnace slag and 10% mixes, put into pulverizer and pulverize weight percent, particle diameter be blast-furnace slag and the cinder mixture of 0.5mm; 2), the cr6 +-containing waste water of 10m3 is put into the centrifugal device that has constant temperature oscillator, described blast-furnace slag and the cinder mixture of adding 2000kg, startup constant temperature oscillator, vibration 150min, centrifugation.Supernatant liquid is qualified water, and discharge re-uses.Throw out is the chromium hydroxide of blast-furnace slag and cinder mixture and reaction generation, as the raw material of operating mine slag cement.
Contain Fe2+ in the blast-furnace slag, the acid industry lower with the pH value contains chromium (Cr6+) meeting stripping when waste water contacts, and the Cr6+ that toxicity is bigger is reduced into the less Cr3+ of toxicity, and slag had both played adsorption and also played neutralizing effect when handling this class waste water.Contain fixed carbon in the cinder, industry contains the bigger Cr6+ of chromium (Cr6+) waste water toxic and is reduced into the less Cr3+ of toxicity, and slag had both played adsorption and also played neutralizing effect when handling this class waste water.
Claims (2)
1. method of handling cr6 +-containing waste water, it is characterized in that: comprise the following steps: 1), be that the cinder of the blast-furnace slag of 85-90% and 10-15% mixes with weight percent, put into pulverizer and pulverize, getting particle diameter is 0.2-0.9mm blast-furnace slag and cinder mixture; 2), the cr6 +-containing waste water of 8-10m3 is put into the centrifugal device that has constant temperature oscillator, the described blast-furnace slag and the cinder mixture that add 1500-2000kg, start constant temperature oscillator, vibration 100-150min, centrifugation, supernatant liquid is qualified water, discharge re-uses, throw out is the chromium hydroxide of blast-furnace slag and cinder mixture and reaction generation, as the raw material of operating mine slag cement.
2. the method for processing cr6 +-containing waste water according to claim 1 is characterized in that: the pH value of described cr6 +-containing waste water is 3-5, when nonconforming, regulates with liming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110211043 CN102295340A (en) | 2011-07-26 | 2011-07-26 | Method for processing wastewater containing Cr<6+> |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110211043 CN102295340A (en) | 2011-07-26 | 2011-07-26 | Method for processing wastewater containing Cr<6+> |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102295340A true CN102295340A (en) | 2011-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110211043 Pending CN102295340A (en) | 2011-07-26 | 2011-07-26 | Method for processing wastewater containing Cr<6+> |
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| CN (1) | CN102295340A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060439A (en) * | 2015-08-28 | 2015-11-18 | 上海中冶环境工程科技有限公司 | Method for treating acid chromium-contained polluted waste water with molten iron residues as raw material |
| CN105800711A (en) * | 2016-05-27 | 2016-07-27 | 北京泰克美高新技术有限公司 | Method for treating hexavalent chromium in wastewater by using gold tailing products |
| CN112591843A (en) * | 2020-12-26 | 2021-04-02 | 昆明理工大学 | Method for treating heavy metal-containing acidic wastewater by using waste |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115276A (en) * | 2010-11-29 | 2011-07-06 | 东北大学 | Method for treating hexavalent chromium wastewater by utilizing blast furnace slag |
-
2011
- 2011-07-26 CN CN 201110211043 patent/CN102295340A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115276A (en) * | 2010-11-29 | 2011-07-06 | 东北大学 | Method for treating hexavalent chromium wastewater by utilizing blast furnace slag |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060439A (en) * | 2015-08-28 | 2015-11-18 | 上海中冶环境工程科技有限公司 | Method for treating acid chromium-contained polluted waste water with molten iron residues as raw material |
| CN105800711A (en) * | 2016-05-27 | 2016-07-27 | 北京泰克美高新技术有限公司 | Method for treating hexavalent chromium in wastewater by using gold tailing products |
| CN112591843A (en) * | 2020-12-26 | 2021-04-02 | 昆明理工大学 | Method for treating heavy metal-containing acidic wastewater by using waste |
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Application publication date: 20111228 |