CN110104829A - A kind of processing method of cyanide containing wastewater - Google Patents
A kind of processing method of cyanide containing wastewater Download PDFInfo
- Publication number
- CN110104829A CN110104829A CN201910401208.7A CN201910401208A CN110104829A CN 110104829 A CN110104829 A CN 110104829A CN 201910401208 A CN201910401208 A CN 201910401208A CN 110104829 A CN110104829 A CN 110104829A
- Authority
- CN
- China
- Prior art keywords
- cyanogen
- cyanide
- processing method
- containing wastewater
- filtrate
- 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
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Classifications
-
- 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
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- 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
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- 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
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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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a kind of processing methods of cyanide containing wastewater, belong to cyaniding metal smelt sewage treatment field.The present invention includes tentatively consolidating cyanogen under faintly acid alkali tune, consolidates cyanogen with ferrous salt depth again after cyanogen root is activated under alkaline condition, finally removes remaining cyanide three phases with oxidizing process.The problem of consumption of oxidant when the present invention reduces oxidation broken cyanide by repeating to consolidate cyanogen with ferrous salt, it is at high cost to solve current sewage treatment containing cyanogen, processing method bad adaptability, enable the invention to the wastewater treatment for adapting to various cyanogen root concentration.Passing through solid cyanogen --- technique associated with broken cyanide ensure that technic index is stablized.
Description
Technical field
The invention belongs to cyanide containing wastewater process field, relate generally to generate during the decyanation of solid slag containing cyanogen useless containing cyanogen
The processing method of water.
Background technique
The production of the noble metals such as gold and silver at present mainly uses cyaniding and leaching process, which stablizes, and cost is relatively low.
But due to the cyanide category severe poisonous chemicals used, so the tailings generated unavoidably contains part cyanide.Cyaniding in the past
Enterprise generally transports outward using cyanidation tailings as iron concentrate product, becomes the raw material of relieving haperacidity, or be stored in special Tailings Dam.But with
Go into effect on August 1st, 2016 " National Hazard waste register ", cyanidation tailings are explicitly decided to be hazardous waste, most of
Area is forbidden transporting and be stored up, and country is heavier to hazardous waste taxation, has exceeded the ability to bear of gold manufacturing enterprises, each to look forward to
Industry carries out technological innovation research successively, so that tailings reaches general solid waste standard.
According to concerned countries standard, remaining solubility cyanide and heavy metal become main main indicator in tailings.Mesh
Preceding there are two main classes thinking, first is that processing ore pulp, but cleaning solution will be reprocessed after tailings production water washing to qualification, washing
It is recycled after liquid processing.Mainstream research shows that the cost for directly handling cyanide in tailings ore pulp is water-soluble much higher than processing equivalent
The cost of cyanide in liquid.
The processing of cyanide is broadly divided into solid cyanogen and oxidation two thinkings of broken cyanide, aoxidizes broken cyanide higher cost, mainly has smelly
Oxygen method, Yin Kefa, chlor-alkali etc. have the disadvantages of energy consumption is high, and secondary pollution is big.
Summary of the invention
For the above problem existing for current conventional treatment method, the invention proposes a kind of solid cyanogen --- associated with broken cyanide
The processing method of the washes containing cyanogen, can be with lower cost Treatment of Cyanide-containing Wastewater to reusable degree, and can remove
Most heavy metals.And solid cyanogen product can be used for producing yellow sodium prussiate etc., there is certain economic benefit.
The present invention includes following procedure:
1, enough ferrous salts are added to aqueous solution containing cyanogen, acid adding tune pH3-6, makes liquid show Prussian blue after mixing evenly
Navy blue filters after stirring.
2, add adjusting PH with base to 10 or more to the filtrate of step 1, acid adding tune pH is 3 to 6 again after stirring, after stirring plus is flocculated
Agent filtering, filtrate should clarify.
3, to step 2 filtrate oxidizer, make extra ferrous complete oxidation ferric iron, then plus alkali make pH 8 to 11,
It is complete to oxidation reaction to continue stirring, filtering, filtrate can return to process reuse.
The invention has the benefit that
1, the present invention has stable treatment effect to the cyanide wastewater of various concentration, when cyanogen root content is lower than 500mg/L
It is aoxidized after cyanogen being consolidated with single, cyanogen can be consolidated when or cyanide existence form complexity higher for concentration twice.
2, the present invention uses ferrous solid cyanogen, low in cost, Gu cyanogen effect is good, does not generate secondary pollution.
3, the solid cyanogen product of the present invention is ferrocyanide, can be used for producing potassium ferrocyanide.
Specific embodiment
By Shandong, gold illustrates concrete mode of the invention for creating certain factory below
The factory uses cyanide gold-leaching technique, and cyanidation tailings are washed with water in filter press, and the main component of water containing cyanogen of generation is shown in
Table one.
The main Harmful ingredient content of one washing lotion of table
1, the ore slurry pump of tailings containing cyanogen is air-dried after filter press pressure is full, is washed with industrial water, washing water consumption is about to filter press
It is 0.8 times of tailings dry weight.Cyanogen slag is qualified after washing, and cleaning solution enters water treatment process, and treatment scale is 8 side per hour.
2, cleaning solution is pumped into blending tank by storage tank, successively mixed with the ferrous sulfate of 5.5 times of cyanogen root quality and the appropriate concentrated sulfuric acid
Close, pH is 3 to 6 after mixing, and into reactor tank, flocculant is added in reaction time about 1.5h, form filters pressing after floc sedimentation, filtrate into
Enter surge tank.
3, filtrate enters second-stage reaction slot by surge tank and adds milk of lime alkali tune, and liquid generates green ferrous precipitation at this time, fills
Point stir about 0.5 hour, make it is ferrous react generation ferrous iron cyanogen root with extra cyanogen root, then plus sulfuric acid tune pH be 3 to 6, stir about
1.5 hours, filters pressing after adding flocculant to flocculate, filtrate should clarify, and no blue and contain ferrous ion, temporary into surge tank.
4, liquid is pumped into oxidation section pre-oxidation slot by dashpot, and every side's liquid adds 5 liters of hydrogen peroxide, with removal it is ferrous from
Son, then flow automatically into pH adjustment tank, add lime tune pH, lime consumption is 7.7 kilograms of side's liquid about every.
5, the hydrogen peroxide of 40 times of cyanogen root quality is added after alkali tune, oxidation reaction about 2 hours, filtering, filtrate main component was shown in
Table two, filtrate can return to as cyanidation tailings washing water.
Main indicator after the processing of table two
Claims (7)
1. a kind of processing method of cyanide containing wastewater, which is characterized in that steps are as follows: (1) stirring the waste water containing cyanide
Add ferrous salt, and adjust pH to 2 to 6 with acid, adds flocculant, agitation and filtration after stirring a period of time；(2) by upper step filtrate tune
Alkali simultaneously optionally adds ferrous salt, and acid is adjusted after stirring a period of time, sufficiently adds flocculant after reaction, filters after stirring, filtrate cyanogen
Too high levels then repeat this step and consolidate cyanogen operation, and cyanogen content is not high then to enter next step；(3) by filtrate oxygenation obtained by step (2)
Agent oxidation, then plus lime, and supplemental oxidant sufficiently filtered after reaction.Filtrate be handle after liquid, it is reusable or into
Enter other process.
2. a kind of processing method of cyanide containing wastewater according to claims 1, it is characterised in that: step (1) described Asia
Molysite includes ferrous sulfate and frerrous chloride.
3. a kind of processing method of cyanide containing wastewater according to claims 1, it is characterised in that: repeatable solid cyanogen filtering
To reduce cyanide content.
4. a kind of processing method of cyanide containing wastewater according to claims 1, it is characterised in that: first add in oxidation process
Partial oxidation agent, is then adjusted to alkalinity, is further continued for oxidation except cyanogen.
5. a kind of processing method of cyanide containing wastewater according to claims 1, it is characterised in that: step (2) filtrate contains
There is ferrous ion.
6. a kind of processing method of cyanide containing wastewater according to claims 1, it is characterised in that: step (2) wadding used
Solidifying agent is anionic.
7. a kind of processing method of cyanide containing wastewater according to claims 1, it is characterised in that: cyanogen is first consolidated in process flow
Reoxidize broken cyanide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910401208.7A CN110104829A (en) | 2019-05-16 | 2019-05-16 | A kind of processing method of cyanide containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910401208.7A CN110104829A (en) | 2019-05-16 | 2019-05-16 | A kind of processing method of cyanide containing wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110104829A true CN110104829A (en) | 2019-08-09 |
Family
ID=67490096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910401208.7A Pending CN110104829A (en) | 2019-05-16 | 2019-05-16 | A kind of processing method of cyanide containing wastewater |
Country Status (1)
| Country | Link |
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| CN (1) | CN110104829A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (8)
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|---|---|---|---|---|
| US5106508A (en) * | 1990-09-26 | 1992-04-21 | Klaus Schwitzgebel | Integrated process for cyanide and heavy metal removal from plating process waste streams |
| JP2013163144A (en) * | 2012-02-10 | 2013-08-22 | Nippon Steel & Sumikin Eco-Tech Corp | Treatment method for cyanide-containing wastewater |
| CN103395910A (en) * | 2013-07-26 | 2013-11-20 | 北京赛科康仑环保科技有限公司 | Vacuum potassium carbonate desulfurization liquid waste treatment technology and device |
| CN107935240A (en) * | 2017-11-28 | 2018-04-20 | 贵州锦丰矿业有限公司 | A kind of SO2The method of/Air method complexed-precipitation method Combined Treatment cyanide gold-leaching Tailings Slurries and waste water |
| CN109019945A (en) * | 2017-06-12 | 2018-12-18 | 鞍钢股份有限公司 | Method for treating cyanide-containing wastewater |
| CN109336288A (en) * | 2018-11-02 | 2019-02-15 | 长春黄金研究院有限公司 | A kind of method that cyanide wastewater recycles |
| CN109502811A (en) * | 2018-12-06 | 2019-03-22 | 山东黄金矿业科技有限公司选冶实验室分公司 | The flocculation sedimentation purification method of Thiocyanate ion in a kind of cyanide wastewater |
| CN208762301U (en) * | 2018-07-05 | 2019-04-19 | 辽宁科技学院 | A kind of depth removes the device of cyanide in coking wastewater |
-
2019
- 2019-05-16 CN CN201910401208.7A patent/CN110104829A/en active Pending
Patent Citations (8)
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|---|---|---|---|---|
| US5106508A (en) * | 1990-09-26 | 1992-04-21 | Klaus Schwitzgebel | Integrated process for cyanide and heavy metal removal from plating process waste streams |
| JP2013163144A (en) * | 2012-02-10 | 2013-08-22 | Nippon Steel & Sumikin Eco-Tech Corp | Treatment method for cyanide-containing wastewater |
| CN103395910A (en) * | 2013-07-26 | 2013-11-20 | 北京赛科康仑环保科技有限公司 | Vacuum potassium carbonate desulfurization liquid waste treatment technology and device |
| CN109019945A (en) * | 2017-06-12 | 2018-12-18 | 鞍钢股份有限公司 | Method for treating cyanide-containing wastewater |
| CN107935240A (en) * | 2017-11-28 | 2018-04-20 | 贵州锦丰矿业有限公司 | A kind of SO2The method of/Air method complexed-precipitation method Combined Treatment cyanide gold-leaching Tailings Slurries and waste water |
| CN208762301U (en) * | 2018-07-05 | 2019-04-19 | 辽宁科技学院 | A kind of depth removes the device of cyanide in coking wastewater |
| CN109336288A (en) * | 2018-11-02 | 2019-02-15 | 长春黄金研究院有限公司 | A kind of method that cyanide wastewater recycles |
| CN109502811A (en) * | 2018-12-06 | 2019-03-22 | 山东黄金矿业科技有限公司选冶实验室分公司 | The flocculation sedimentation purification method of Thiocyanate ion in a kind of cyanide wastewater |
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| 刘建昌等: "《突发环境事件常见污染物甄别及处置》", 31 August 2017, 华南理工大学出版社 * |
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| 雷乐成等: "《水处理高级氧化技术》", 31 August 2001, 化学工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2023098190A1 (en) * | 2021-12-01 | 2023-06-08 | 湖南邦普循环科技有限公司 | Treatment method for wastewater containing cyanide and oxalate |
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