CN109336288A - A kind of method that cyanide wastewater recycles - Google Patents
A kind of method that cyanide wastewater recycles Download PDFInfo
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- CN109336288A CN109336288A CN201811298958.8A CN201811298958A CN109336288A CN 109336288 A CN109336288 A CN 109336288A CN 201811298958 A CN201811298958 A CN 201811298958A CN 109336288 A CN109336288 A CN 109336288A
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- cyanide
- waste water
- recycles
- cyanide wastewater
- ferrous sulfate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Physical Water Treatments (AREA)
Abstract
The present invention relates to environment protection field pollutant process method, in particular to a kind of method that cyanide wastewater recycles；Cyanide in Cyanide Wastewater and content of beary metal according to concentration of cyanide range in 6000~15000mg/L is high, intractable feature, it selects acidification absorption method to come out the cyanide stripping in waste water first to recycle, waste liquid after acidification stripping enters in ferrous sulfate reaction tank, lye control reaction process pH value is added between 6~7, cyanide is further removed, finally by the suspended particulate substance in coagulating sedimentation removal waste water, heavy metal ion pollutant, with high treating effect, treatment effeciency is high, system run all right, process flow is simple, the advantages that being easy to implement industrial application, treated, and waste water can return to the technological process of production uses as recycled water.
Description
Technical field
The present invention relates to environment protection field pollutant process method, in particular to a kind of method that cyanide wastewater recycles.
Background technique
In golden production, since the wet underwater welding of gold is needed using cyanide, thus it must produce in process of production
Raw a certain amount of cyanide wastewater.High cyanide containing wastewater toxicity is big, its treatment measures mainly recycles in process of production
And qualified discharge.According to national environmental protection policy requirements, " zero-emission " actively is advocated, so current high cyanide containing wastewater is all
It must recycle, but will lead to the various harmful elements having an impact in waste water to production technology due to recycling
Ion constantly accumulates, and influences production technology index.
Currently, domestic relatively more to the Processing Technology Research of cyanide wastewater, the processing method of cyanide is oxidizing process, adopts more
With oxychloride method, Ozonation, Yin Kefa etc., but it is seldom to the processing technique of high cyanide containing wastewater both at home and abroad, it deposits more
In complex process, treatment effect is unstable, the problem that pollutants removal rate is low, operating cost is high.Therefore, gold mine enterprise is anxious
It need to seek a kind of processing method of high cyanide containing wastewater, treated, and waste water energy is recycled into production technology, is being guaranteed
While process stabilizing is run, and a part of valuable component in waste water can be recycled.
Summary of the invention
In order to overcome the above problem, the present invention provides a kind of method that cyanide wastewater recycles, and it is dense to be suitable for cyanide
Range is spent in the cyanide wastewater of 6000~15000mg/L, is that a kind of process flow is simple, high treating effect, treatment effeciency are high, fortune
The stable Study on Treatment for High Concentration Cyanide method of row.
A kind of method that cyanide wastewater recycles contains cyanogen in 6000~15000mg/L according to concentration of cyanide range
Cyanide in Waste Water compound and content of beary metal height, intractable feature, select acidification absorption method to blow the cyanide in waste water first
It takes off and is recycled, the waste liquid after being acidified stripping enters in ferrous sulfate reaction tank, and lye is added and controls reaction process pH value
Between 6~7, cyanide is further removed, finally by coagulating sedimentation removal waste water in suspended particulate substance, heavy metal from
Sub- pollutant, the specific steps are as follows:
Step (1) adds the concentrated sulfuric acid into cyanide wastewater, adjusts pH value between 1.5~3.5, waste liquid temperature is kept to exist
It 25~35 DEG C, is passed through air and carries out acidification stripping processing, the gas after being acidified stripping is absorbed with milk of lime, and absorbing liquid returns to gold
In the technological process of production；
Step (2), be acidified stripping after waste liquid enter in stirred tank, under stirring be added mass fraction 98% with
On ferrous sulfate, while lye control reaction process pH value is added between 6~7, being kept stirring the state response time is
5min~60min；
Step (3), the waste water after reaction add flocculant under stirring and carry out coagulating sedimentation, useless after coagulating sedimentation
Water enters sedimentation basin and staticly settles 180min~300min；
Step (4), the waste liquid after the completion of stewing process return in the technological process of production.
In the step (1), the gas liquid ratio that air and waste water are passed through when being acidified stripping is 100~200:1.
In the step (2), ferrous sulfate dosage depending on the content of cyanide in waste liquid is how many and processing requirement,
The content of cyanide is high, processing index request is tight, and the dosage of ferrous sulfate accordingly increases, conversely, cyanide content is low, processing
Index request pine, the dosage of ferrous sulfate are accordingly reduced；
In the step (2), the lye for adjusting pH value is milk of lime.
In the step (3), flocculant is polyacrylamide, and flocculant wiring solution-forming state is added.
Beneficial effects of the present invention:
Cyanide in Cyanide Wastewater and heavy metal of the present invention according to concentration of cyanide range in 6000~15000mg/L contain
Amount height, intractable feature carry out advanced treating to cyanide wastewater, have high treating effect, treatment effeciency height, system operation surely
Calmly, process flow is simple, is easy to implement the advantages that industrial application, and treated, and waste water can return to the technological process of production as regeneration
Water uses.
Specific embodiment
A kind of method that cyanide wastewater recycles, comprising the following steps:
Step (1) adds the concentrated sulfuric acid into cyanide wastewater, adjusts pH value between 1.5~3.5, waste liquid temperature is kept to exist
It 25~35 DEG C, is passed through air and carries out acidification stripping processing, the gas after being acidified stripping is absorbed with 10% milk of lime of mass fraction, inhaled
Liquid is received to return in golden production process flow；
Step (2), the waste liquid after being acidified stripping enter in stirred tank, and waste liquid enters stirred tank and starts to stir and maintain to stir
Mix state, add ferrous sulfate of the mass fraction 98% or more, at the same be added lye control reaction process pH value 6~7 it
Between, being kept stirring the state response time is 5min~60min；
Step (3), the waste water after reaction add flocculant under stirring and carry out coagulating sedimentation, useless after coagulating sedimentation
Water enters sedimentation basin and staticly settles 180min~300min；
Step (4), the waste liquid after the completion of stewing process return in the technological process of production.
In the step (1), the gas liquid ratio that air and waste water are passed through when being acidified stripping is 100~200:1.
In the step (2), ferrous sulfate dosage depending on the content of cyanide in waste liquid is how many and processing requirement,
The content of cyanide is high, processing index request is tight, and the dosage of ferrous sulfate accordingly increases, conversely, cyanide content is low, processing
Index request pine, the dosage of ferrous sulfate are accordingly reduced；
In the step (2), the lye for adjusting pH value is 10% milk of lime of mass fraction.
In the step (3), flocculant is polyacrylamide, and flocculant wiring solution-forming state is added.
Embodiment 1
Certain gold mine cyanide wastewater, pH value 12.89, CNTFor 7156mg/L, CNfFor 3710mg/L, Cu2+For
2046mg/L, Fe3+For 2083mg/L, in addition there are other heavy metal ion.2L waste water is taken to be placed in blow-off groove, blow-off groove one
Stainless steel sealing device, outside are equipped with inlet tube, outlet tube, chemical feed pipe, escape pipe, pH meter, thermometer and pressure gauge, escape pipe
Absorption plant is connected, the milk of lime that mass fraction is 10% is filled in absorption plant, blow-off groove interior groove bottom is equipped with air aeration
Blow-off groove is placed in water-bath heated at constant temperature to 35 DEG C, the concentrated sulfuric acid is added by device, is adjusted waste liquor PH between 1.5~3.5, is opened
Air aeration device is opened, stripping 180min is passed through the gas liquid ratio 200:1 of air and waste water, and the waste liquid after stripping is placed in stirred tank,
Ferrous sulfate 5.0g is added under agitation, is adjusted reaction process pH to 6~7 with 10% milk of lime, is stirred to react 60min,
Then 0.5 ‰ cationic polyacrylamide solution 10mL are added, stirring 2min is adjusted, stops stirring, stand 180min, water outlet warp
PH value is analyzed between 6~7, CNTFor 9.13mg/L, CNfFor 3.25mg/L, Cu2+For 0.02mg/L, Fe3+For 231.24mg/L,
Water quality that treated can reach reuse requirement.
Embodiment 2
Certain gold mine cyanide wastewater, pH value 12.62, CNTFor 10217mg/L, CNfFor 8490mg/L, Cu2+For
4620mg/L, Fe3+For 1780mg/L, in addition there are other heavy metal ion.2L waste water is taken to be placed in blow-off groove, blow-off groove one
Stainless steel sealing device, outside are equipped with inlet tube, outlet tube, chemical feed pipe, escape pipe, pH meter, thermometer and pressure gauge, escape pipe
Absorption plant is connected, 10% milk of lime is filled in absorption plant, blow-off groove interior groove bottom is equipped with air aeration device, by blow-off groove
Heated at constant temperature is placed in water-bath to 25 DEG C, the concentrated sulfuric acid is added, waste liquor PH is adjusted between 1.5~3.5, opens aerator, blow
De- 240min, the gas liquid ratio for being passed through air and waste water is 100:1, and the waste liquid after stripping is placed in stirred tank, under agitation
Ferrous sulfate 6.0g is added, reaction process pH to 6~7 is adjusted with 10% milk of lime, is stirred to react 5min, then adds 0.5 ‰
Cationic polyacrylamide solution 10mL adjusts stirring 2min, stops stirring, stands 300min, water outlet through analysis pH value 6~
Between 7, CNTFor 10.25mg/L, CNfFor 4.72mg/L, Cu2+For 0.67mg/L, Fe3+For 156.32mg/L, water quality that treated
It can reach reuse requirement.
Claims (5)
1. a kind of method that cyanide wastewater recycles, it is characterised in that include the following steps:
Step (1), adds the concentrated sulfuric acid into cyanide wastewater, adjusts pH value between 1.5~3.5, keep waste liquid temperature 25~
It 35 DEG C, is passed through air and carries out acidification stripping processing, the gas after being acidified stripping is absorbed with milk of lime, and absorbing liquid returns to golden production
In process flow；
Step (2), the waste liquid after being acidified stripping enter in stirred tank, and mass fraction is added under stirring 98% or more
Ferrous sulfate, at the same be added lye control reaction process pH value between 6~7, be kept stirring the state response time be 5min~
60min；
Step (3), the waste water after reaction add flocculant under stirring and carry out coagulating sedimentation, the waste water after coagulating sedimentation into
Enter sedimentation basin and staticly settles 180min~300min；
Step (4), the waste liquid after the completion of stewing process return in the technological process of production.
2. the method that a kind of cyanide wastewater according to claim 1 recycles, it is characterised in that in the step (1),
The gas liquid ratio that air and waste water are passed through when being acidified stripping is 100~200:1.
3. the method that a kind of cyanide wastewater according to claim 1 recycles, it is characterised in that in the step (2),
Ferrous sulfate dosage is depending on the content of cyanide in waste liquid is how many and processing requirement, and the content of cyanide is high, processing refers to
Mark requires sternly, and the dosage of ferrous sulfate accordingly increases, conversely, cyanide content is low, processing index request pine, ferrous sulfate
Dosage is accordingly reduced.
4. the method that a kind of cyanide wastewater according to claim 1 recycles, it is characterised in that in the step (2),
The lye for adjusting pH value is milk of lime.
5. the method that a kind of cyanide wastewater according to claim 1 recycles, it is characterised in that in the step (3),
Flocculant is polyacrylamide, and flocculant wiring solution-forming state is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811298958.8A CN109336288A (en) | 2018-11-02 | 2018-11-02 | A kind of method that cyanide wastewater recycles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811298958.8A CN109336288A (en) | 2018-11-02 | 2018-11-02 | A kind of method that cyanide wastewater recycles |
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| CN109336288A true CN109336288A (en) | 2019-02-15 |
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| CN201811298958.8A Pending CN109336288A (en) | 2018-11-02 | 2018-11-02 | A kind of method that cyanide wastewater recycles |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110104829A (en) * | 2019-05-16 | 2019-08-09 | 山东金创金银冶炼有限公司 | A kind of processing method of cyanide containing wastewater |
| CN112028309A (en) * | 2020-08-22 | 2020-12-04 | 长春黄金研究院有限公司 | Method for resource recovery of high-concentration cyanide-containing wastewater and treatment of intermediate product |
| CN114180753A (en) * | 2021-12-01 | 2022-03-15 | 湖南邦普循环科技有限公司 | Method for treating wastewater containing cyanide and oxalate |
| CN116986731A (en) * | 2023-09-25 | 2023-11-03 | 长春黄金研究院有限公司 | Biological strengthening treatment method for waste water containing arsenic and ammonia nitrogen in gold industry |
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| AU2002951283A0 (en) * | 2002-09-09 | 2002-09-19 | Occtech Engineering Pty Ltd | Process and apparatus for recovery of cynanide and metals |
| JP2015047580A (en) * | 2013-09-03 | 2015-03-16 | 大阪ガスエンジニアリング株式会社 | Treatment equipment and treatment method for cyanogen-containing solution and method for producing solution having reduced cyanogen ions by the method |
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| EP3050853A1 (en) * | 2015-01-29 | 2016-08-03 | Universiteit van Amsterdam | Method for removing cyanide compounds from wastewater |
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| AU2002951283A0 (en) * | 2002-09-09 | 2002-09-19 | Occtech Engineering Pty Ltd | Process and apparatus for recovery of cynanide and metals |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110104829A (en) * | 2019-05-16 | 2019-08-09 | 山东金创金银冶炼有限公司 | A kind of processing method of cyanide containing wastewater |
| CN112028309A (en) * | 2020-08-22 | 2020-12-04 | 长春黄金研究院有限公司 | Method for resource recovery of high-concentration cyanide-containing wastewater and treatment of intermediate product |
| CN114180753A (en) * | 2021-12-01 | 2022-03-15 | 湖南邦普循环科技有限公司 | Method for treating wastewater containing cyanide and oxalate |
| CN116986731A (en) * | 2023-09-25 | 2023-11-03 | 长春黄金研究院有限公司 | Biological strengthening treatment method for waste water containing arsenic and ammonia nitrogen in gold industry |
| CN116986731B (en) * | 2023-09-25 | 2024-01-05 | 长春黄金研究院有限公司 | Biological strengthening treatment method for waste water containing arsenic and ammonia nitrogen in gold industry |
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Application publication date: 20190215 |