CN110092406A - A kind of method of cuprous cyanide harmless treatment - Google Patents
A kind of method of cuprous cyanide harmless treatment Download PDFInfo
- Publication number
- CN110092406A CN110092406A CN201810085638.8A CN201810085638A CN110092406A CN 110092406 A CN110092406 A CN 110092406A CN 201810085638 A CN201810085638 A CN 201810085638A CN 110092406 A CN110092406 A CN 110092406A
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- CN
- China
- Prior art keywords
- cuprous cyanide
- cyanide
- harmless treatment
- copper
- cuprous
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- 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.)
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G3/00—Compounds of copper
- C01G3/02—Oxides; Hydroxides
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to a kind of method of cuprous cyanide harmless treatment, especially lays particular emphasis on and recycle copper from discarded cuprous cyanide severe toxicity powder and to the further harmlessness disposing of waste liquid.It is soaked to the discarded a small amount of clear water of cuprous cyanide powder come is collected, is added after heavy copper agent solution is sufficiently stirred and adds a small amount of flocculant, up to cupric precipitating and filtrate containing cyanogen after filtering.Cupric precipitating cleans the remaining cyanide of removal with liquor natrii hypochloritis, and the copper oxide of high-purity, cleaning solution and filtrate containing cyanogen are obtained after drying using discharge after sending the further harmlessness disposing in waste water workshop up to standard after the technical treatment of two-stage broken cyanide.The advantages of invention is that process flow is simple, and safe operation, risk of environmental pollution is small, and copper recovery is high, can make full use of the existing equipment in workshop and technology, has preferable environmental benefit and economic benefit.
Description
Technical field
The present invention relates to a kind of methods of cuprous cyanide harmless treatment, concretely relate to a kind of cuprous cyanide chemistry
The environmental technology field of copper and innoxious safe disposal cyanide is recycled in product.
Technical background
At present for the processing technique comparative maturity of cyanide bearing waste solution, it is substantially free of in such waste liquid and recycles value
Metallic element deals with and is relatively easy.But it is directed to cyanide solid not soluble in water, such as discarded cuprous cyanide
Solid, then imappropriate processing method.Cuprous cyanide is widely used in the industries such as plating, pesticide, belongs to extremely toxic substance, poison
Property is similar to hydrogen cyanide, it is therefore desirable to reasonably be disposed to discarded cuprous cyanide, to avoid safety accident and ring is caused
Border pollution.
Patent CN102515388A discloses a kind of Study on Treatment for High Concentration Cyanide method, it is characterised in that first to containing cyanogen
Waste water is acidified, and is formed after cuprous cyanide precipitating and is carried out alkaline chloride oxidation removal cyanide ion to filtrate again.Its disadvantage exists
It does not explain in the subsequent processing precipitated to cuprous cyanide, still can threaten to environment, there are potential security risks.
Patent CN102153161A discloses a kind of advance for the treatment of process of cyanide-bearing effluent and its equipment, it is characterised in that passes through resin
The method of absorption is enriched with, and then reduces the cyanogen concentration in waste water.Its shortcoming is that the cost input of equipment is larger, and not
Suitable for handling cuprous cyanide solid not soluble in water.
Summary of the invention
The present invention provides a kind of methods of cuprous cyanide harmless treatment, much small according to the Ksp constant of cuprous sulfide
In the property of cuprous cyanide, cuprous hydroxide, cuprous cyanide is precipitated using soluble sulphurizing salt, obtain cupric precipitating and
Filtrate containing cyanogen.Cupric is oxidized to high-purity mangesium oxide copper products after being deposited in subsequent clean the surface residual cyanide, and filtrate containing cyanogen can
It is disposed by the existing cyanogen breaking process in workshop and equipment safety, the final harmless treatment for realizing cuprous cyanide.
The technical solution adopted by the present invention is that: using the severe poisonous chemicals containing cuprous cyanide as object, by electroless copper plating, wadding
The reaction such as retrogradation shallow lake and broken cyanide, obtains the oxidation copper products of high-purity, by-product cyanide bearing waste solution also obtains safe disposal, and method is successively
Include: (1) heavy copper agent is added into reactive tank, water be configured to 5%~15% heavy copper agent solution；(2) it is fallen into heavy copper agent solution
Enter cuprous cyanide powder, slowly stirring reacts it sufficiently；(3) a small amount of flocculant is added into reactive tank；It (4) will be in reactive tank
Material is separated by solid-liquid separation, and obtains cupric precipitating and filtrate containing cyanogen；(5) cupric precipitating is cleaned with 10% liquor natrii hypochloritis, tap water,
Obtain oxidation copper products；(6) qualified discharge after cyanogen filtrate and cleaning solution second level broken cyanide and advanced treating will be contained.
Further, in above-mentioned technical proposal, the severe poisonous chemicals containing cuprous cyanide include containing cuprous cyanide
Powder, the solution containing cuprous cyanide.
Further, in above-mentioned technical proposal, the heavy copper agent is sulphurizing salt, is vulcanization than more typical sulfide
Sodium, potassium sulfide.
Further, in above-mentioned technical proposal, the raw material dosage is according to cuprous cyanide content in waste chemicals
Difference, the dosage of heavy copper agent are 1.05~2 times of theoretical amount, and the copper that sinks reacts the whipping process time for 20~60min.
Further, in above-mentioned technical proposal, the flocculant is one or both of PAC, PAM, flocculant
Concentration is 0.3%~1%.
Compared with the prior art, the invention has the following advantages:
(1) Cu in cuprous cyanide+、Cu2+It directly participates in chemical reaction and forms precipitation and separation, do not destroy CN-Ion does not have hydrogen cyanogen
Acid gas generates, and the cyanide bearing waste solution disposal technology of generation is mature, safe operation process, can completely turn the cuprous cyanide of severe toxicity
Turn to can resource recycling copper oxide, realize innoxious, the resource utilization of waste.
(2) present invention provides a kind of new thinking, this method process for the safe disposal of water-insoluble cyanide solid
Simply, heavy copper settles at one go, low to process units requirement, is easy to industrialization.
Detailed description of the invention
Fig. 1 is a kind of method flow schematic diagram of cuprous cyanide harmless treatment of the present invention.
Specific embodiment
Process of the invention is described in further detail below with reference to specific embodiments of the present invention.
(1) the vulcanized sodium solid (purity 52%) of 85kg is added to reactive tank, water is added to be made into 10% sodium sulfide solution；
(2) pour into 100kg cuprous cyanide powder (wherein, cuprous cyanide mass fraction be 73.6%), slowly stir, sufficiently react,
40~60min of reaction time；
(3) a small amount of 0.3% PAM solution coagulating sedimentation is added into reactive tank；
(4) it stands and directly uses filter-cloth filtering after solid-liquid layering, collect cupric precipitating and filtrate respectively；
(5) precipitating is cleaned twice with a small amount of bleaching water, then cleaned with clear water to neutrality, high-purity mangesium oxide copper powders obtained by drying,
Filtrate uses qualified discharge after second level broken cyanide technology advanced treating.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art within the technical scope of the present disclosure, according to the technique and scheme of the present invention and its
Design is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of method of cuprous cyanide harmless treatment, which is characterized in that using the severe poisonous chemicals containing cuprous cyanide as object,
It is reacted by electroless copper plating, flocculation sedimentation and broken cyanide etc., obtains the oxidation copper products of high-purity, by-product cyanide bearing waste solution is also pacified
Full disposition, method successively include:
(1) heavy copper agent is added into reactive tank, water be configured to 5%~15% heavy copper agent solution；
(2) cuprous cyanide powder is poured into heavy copper agent solution, slowly stirring reacts it sufficiently；
(3) a small amount of flocculant is added into reactive tank；
(4) material in reactive tank is separated by solid-liquid separation, obtains cupric precipitating and filtrate containing cyanogen；
(5) cupric precipitating is cleaned with 10% liquor natrii hypochloritis, tap water, obtains oxidation copper products；
(6) qualified discharge after cyanogen filtrate and cleaning solution second level broken cyanide and advanced treating will be contained.
2. a kind of method of cuprous cyanide harmless treatment according to claim 1, which is characterized in that containing cuprous cyanide
Severe poisonous chemicals include the powder containing cuprous cyanide, the solution containing cuprous cyanide.
3. a kind of method of cuprous cyanide harmless treatment according to claim 1, which is characterized in that heavy copper agent is vulcanization
Salt is vulcanized sodium, potassium sulfide than more typical sulfide.
4. a kind of method of cuprous cyanide harmless treatment according to claim 1, which is characterized in that according to discarded chemistry
The difference of cuprous cyanide content in product, the dosage of heavy copper agent are 1.05~2 times of theoretical amount, and the copper that sinks reacts the whipping process time
For 20~60min.
5. a kind of method of cuprous cyanide harmless treatment according to claim 1, which is characterized in that flocculant PAC,
One or both of PAM, the concentration of flocculant are 0.3%~1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810085638.8A CN110092406A (en) | 2018-01-29 | 2018-01-29 | A kind of method of cuprous cyanide harmless treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810085638.8A CN110092406A (en) | 2018-01-29 | 2018-01-29 | A kind of method of cuprous cyanide harmless treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110092406A true CN110092406A (en) | 2019-08-06 |
Family
ID=67442693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810085638.8A Withdrawn CN110092406A (en) | 2018-01-29 | 2018-01-29 | A kind of method of cuprous cyanide harmless treatment |
Country Status (1)
| Country | Link |
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| CN (1) | CN110092406A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111392944A (en) * | 2020-03-24 | 2020-07-10 | 宁波神化特种化学品集成有限公司 | Treatment method of cuprous cyanide production wastewater |
| CN112358090A (en) * | 2020-11-18 | 2021-02-12 | 云南黄金矿业集团股份有限公司 | Harmless treatment method for gold smelting cyanide-and heavy metal-containing wastewater |
| CN112408457A (en) * | 2020-11-25 | 2021-02-26 | 东江环保股份有限公司 | Method for preparing copper sulfate from solid waste containing cuprous cyanide |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6919030B2 (en) * | 1999-10-01 | 2005-07-19 | Hannah Technologies Limited Partnership | Process for recovering cyanide from copper-containing feed material |
| CN101717159A (en) * | 2008-10-09 | 2010-06-02 | 清远市中捷环保有限公司 | Molecular micro-electrolysis treatment method for electroplating wastewater containing cyanogen |
| CN105776655A (en) * | 2016-03-07 | 2016-07-20 | 紫金矿业集团股份有限公司 | Method for producing copper concentrates and prussian blue by means of mine copper cyanide wastewater |
| CN106219807A (en) * | 2016-08-18 | 2016-12-14 | 紫金矿业集团股份有限公司 | The mine low concentration integrated conduct method containing Effluent of cuprous cyanide |
-
2018
- 2018-01-29 CN CN201810085638.8A patent/CN110092406A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6919030B2 (en) * | 1999-10-01 | 2005-07-19 | Hannah Technologies Limited Partnership | Process for recovering cyanide from copper-containing feed material |
| CN101717159A (en) * | 2008-10-09 | 2010-06-02 | 清远市中捷环保有限公司 | Molecular micro-electrolysis treatment method for electroplating wastewater containing cyanogen |
| CN105776655A (en) * | 2016-03-07 | 2016-07-20 | 紫金矿业集团股份有限公司 | Method for producing copper concentrates and prussian blue by means of mine copper cyanide wastewater |
| CN106219807A (en) * | 2016-08-18 | 2016-12-14 | 紫金矿业集团股份有限公司 | The mine low concentration integrated conduct method containing Effluent of cuprous cyanide |
Non-Patent Citations (2)
| Title |
|---|
| CAVIN-WEI: "氰化亚铜溶于碱液后生成什么物质？", 《小木虫》 * |
| 赵由才等: "《湿法冶金污染控制技术》", 31 March 2003, 冶金工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111392944A (en) * | 2020-03-24 | 2020-07-10 | 宁波神化特种化学品集成有限公司 | Treatment method of cuprous cyanide production wastewater |
| CN112358090A (en) * | 2020-11-18 | 2021-02-12 | 云南黄金矿业集团股份有限公司 | Harmless treatment method for gold smelting cyanide-and heavy metal-containing wastewater |
| CN112408457A (en) * | 2020-11-25 | 2021-02-26 | 东江环保股份有限公司 | Method for preparing copper sulfate from solid waste containing cuprous cyanide |
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Application publication date: 20190806 |
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