CN108821472A - Metal top cradle and wastewater recycling method in precipitating-gas floatation process recycling Cyanide Wastewater of Gold Mine - Google Patents
Metal top cradle and wastewater recycling method in precipitating-gas floatation process recycling Cyanide Wastewater of Gold Mine Download PDFInfo
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- CN108821472A CN108821472A CN201810722723.0A CN201810722723A CN108821472A CN 108821472 A CN108821472 A CN 108821472A CN 201810722723 A CN201810722723 A CN 201810722723A CN 108821472 A CN108821472 A CN 108821472A
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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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses metal top cradle and wastewater recycling methods in a kind of precipitating-gas floatation process recycling Cyanide Wastewater of Gold Mine, including：PH value of waste water is adjusted to 6-7, makes Cu in waste water ion mainly with [Cu (CN)3]2‑Form exists；Metal cyanogen complex ion collecting agent is added in waste water, is reacted with copper cyanogen complex ion, lead cyanogen complex ion etc. and is generated flocculent deposit substance；Deposit is recycled in air bearing in airfloat equipment；Dosing coagulant handles remaining waste water, and the supernatant after precipitating can be recycled.The present invention can remove in waste water 90% or more metal cyanogen complex ion, and remaining Cyanide in Waste Water mainly exists in the form of free cyanogen.This method can effectively solve the problem that it is cyanidation gold-extracted during accumulation problem of the metal ion in leachate, treated, and waste water can be used as is recycled in recirculated water return system.
Description
Technical field
The present invention relates to metal top cradle and cycling utilization of wastewater in a kind of precipitating-gas floatation process recycling Cyanide Wastewater of Gold Mine
Method belongs to wastewater treatment and technical field of resource recovery.
Background technique
Currently, China's golden production mainly uses Cyanide Process, mention after gold in generated leachate except containing gold,
Outside the precious metal ions such as silver, also containing heavy metal ion such as copper, lead.The lean solution that metal ion content is less in production process returns
System circulation utilizes.As lean solution is constantly recycled, the metal ions such as copper, lead are gradually accumulated in leachate.The gold of accumulation
Category ion can improve the consumption of subsequent leaching process dissolved oxygen and Cymag medicament, reduce the leaching efficiency of gold, silver, so
The foreign metal ions such as copper, lead, which become, influences the principal element that leachate is recycled.Foreign metal ion too high levels leach
Liquid can only outlet, become cyanide wastewater to be processed.
Therefore, it selects a kind of suitable method to recycle the foreign metal ion in Cyanide Wastewater of Gold Mine, can not only make gold
Belong to resource to be comprehensively utilized, while the water containing free cyanogen can also be recycled, and reduce the discharge rate of cyanide wastewater, reduce
Processing cost no matter to the performance of enterprises, or is all of great significance to ecological environmental protection.
In order to eliminate the influence of foreign metal ion, the utilization rate of cyanogen is improved, industry has studied many methods, such as：Acidification
Recycling, ion exchange resin exchange, solvent extraction-electrolysis, copper cyanider precipitation method etc..Most widely used in these methods is to be acidified back
Receipts technology.Acidification recycling is in acid condition, the HCN in waste water to be separated and recovered by operations such as heating, stripping, absorption,
Then copper is recycled with the copper rhodanide precipitation method.This method can effectively recycle the cyanogen in waste water, but to metal ions such as copper, zinc
The rate of recovery is insufficient.In addition, the technology there is also costs of investment it is high, corrosive medium is strong the problems such as.Solvent extraction is recyclable useless
Most metal in water, but since extraction process solvent loss is larger, operating cost is high, therefore application example is less at present.
Ion exchange resin during Treatment of Cyanide-containing Wastewater, due to metel complex ion can strong adsorption on resin, to resin elution again
Green tape carrys out saturated adsorption capacity that is difficult, while also reducing resin, so limiting this method in actual process
Using.
Summary of the invention
Technical problem：The purpose of the present invention is in metal cyanogen complex ion and HCN recovery method in existing cyanide wastewater
Existing deficiency provides metal top cradle and cycling utilization of wastewater side in a kind of precipitating-gas floatation process recycling Cyanide Wastewater of Gold Mine
Method.
Technical solution：Metal top cradle and waste water circulation in precipitating of the invention-gas floatation process recycling Cyanide Wastewater of Gold Mine
Using method, include the following steps：
(1) pH value is adjusted：Dilute sulfuric acid is slowly added into cyanide wastewater in whipping process, adjusts the pH value of cyanide wastewater
To 6-7；
(2) precipitation reaction：In the case where continuing stirring, metal cyanogen complex ion collecting agent is quantitatively added into cyanide wastewater,
Cyanide wastewater reaction generates flocculent deposit；
(3) dissolved air flotation：Cyanide wastewater is imported into airfloat equipment and carries out air-flotation process, the froth pulp of floating is containing metal
The deposit of cyanogen complex ion；
(4) coagulating sedimentation：The remaining underflow of dissolved air flotation is imported into coagulation reaction tank, is successively added under stirring
Flocculating agent and flocculant carry out coagulating, and the cyanide wastewater after coagulation is sent into sedimentation basin standing sedimentation 30min-120min；
(5) the supernatant liquid after precipitating returns to be recycled in the technological process of production.
The metal cyanogen complex ion collecting agent is quaternary ammonium salt substance, such as octadecyltrimethylammonium chloride.
The dosage of the metal cyanogen complex ion collecting agent is thrown according to waste water 100g metal cyanogen complex ion collecting agent per ton
Adding, flocculent deposit tests underwater gold category cyanogen complex ion residual volume after being formed, if being higher than processing requirement, continues to add collecting agent,
Until at or below processing requirement.
The airfloat equipment is mining flotation device, flotation column or water process airfloat equipment.
The flocculating agent is aluminium polychloride, additive amount 5g/m3-10g/m3。
The flocculant is polyacrylamide, additive amount 1g/m3-3g/m3。
Beneficial effect：By adopting the above-described technical solution, the present invention can remove in waste water 90% or more metal cyanogen network
Ion has effectively recycled metal cyanogen complex ion in Cyanide Wastewater of Gold Mine, solves and limits since the metal ions such as copper, lead are accumulated
The problem of leachate is recycled, remaining cyanogen mainly exists in the form of free cyanogen in waste water, so waste water can be recycled.
Remaining quaternary ammonium salt will not generate adverse effect to leaching process.This method recycles metal resource, eliminates the shadow of metal ion
It rings, improves the utilization rate of cyanogen, largely the waste water containing free cyanogen is recycled, reduce the discharge rate of hazardous waste,
Processing cost is reduced, is of great significance to ecological environmental protection.Compared with prior art, the present invention have it is easy to operate,
At low cost, the advantages that corrosive medium is weak, metal recovery rate is high.
Specific embodiment
Metal top cradle and cycling utilization of wastewater side in a kind of precipitating of the invention-gas floatation process recycling Cyanide Wastewater of Gold Mine
Method, specific step is as follows：
(1) pH value is adjusted：Dilute sulfuric acid is slowly added into cyanide wastewater in whipping process, adjusts the pH value of cyanide wastewater
To 6-7；
(2) precipitation reaction：In the case where continuing stirring, metal cyanogen complex ion collecting agent is quantitatively added into cyanide wastewater,
Cyanide wastewater reaction generates flocculent deposit；The metal cyanogen complex ion collecting agent is quaternary ammonium salt substance, such as octadecyl three
Ammonio methacrylate.The dosage of the metal cyanogen complex ion collecting agent is according to waste water 100g metal cyanogen complex ion collecting agent per ton
It adds, flocculent deposit tests underwater gold category cyanogen complex ion residual volume after being formed, if being higher than processing requirement, continues to add collecting
Agent, until at or below processing requirement.
(3) dissolved air flotation：Cyanide wastewater is imported into airfloat equipment and carries out air-flotation process, the froth pulp of floating is containing metal
The deposit of cyanogen complex ion；The airfloat equipment is mining flotation device, flotation column or water process airfloat equipment.
(4) coagulating sedimentation：The remaining underflow of dissolved air flotation is imported into coagulation reaction tank, is successively added under stirring
Flocculating agent and flocculant carry out coagulating, and the cyanide wastewater after coagulation is sent into sedimentation basin standing sedimentation 30min-120min；
The flocculating agent is aluminium polychloride, additive amount 5g/m3-10g/m3；The flocculant is polyacrylamide, additive amount
For 1g/m3-3g/m3。
(5) the supernatant liquid after precipitating returns to be recycled in the technological process of production.
The present invention will be further described with reference to the examples below：
Embodiment 1：
Certain gold ore cyanide wastewater, pH value 12, total cyanogen 2700mg/L, content of copper ion 730mg/L, lead ion contain
Amount is 12mg/L, additionally contains a small amount of gold, silver plasma.
(1) in pretreatment reaction pond, on-line checking pH value of waste water, with 150 revs/min of stirring waste water, in whipping process
It is slowly added dilute sulfuric acid and adjusts pH value of waste water to 6.9；
(2) waste water circulation requires metal cyanogen complex ion content lower than 7mg/L.Continue stirring, is added into waste water
100g/m3Octadecyltrimethylammonium chloride, wadding body test residual metal cyanogen complex ion concentration in water and are higher than 7mg/L after being formed,
Octadecyltrimethylammonium chloride dosage is continued growing, until residual metal cyanogen complex ion concentration is lower than 7mg/L；
(3) waste water is imported in mining flotation device, air flotation, froth pulp is the flocculent deposit of the complex ion of cyanogen containing metal
Substance；
(4) the remaining underflow waste water of dissolved air flotation imports coagulation reaction tank, successively in the case where 175 revs/min of revolving speeds stir
Add aluminium polychloride 5g/m3With polyacrylamide 1g/m3Coagulating is carried out, waste water enters sedimentation basin standing sedimentation after coagulation
30min；
(5) the supernatant liquid after precipitating returns to the technological process of production.
Embodiment 2：
Certain gold ore cyanide wastewater, pH value 11.5, total cyanogen 1500mg/L, content of copper ion 410mg/L, lead ion
Content is 15mg/L.
(1) in pretreatment reaction pond, on-line checking pH value of waste water, with 150 revs/min of stirring waste water, in whipping process
It is slowly added dilute sulfuric acid and adjusts pH value of waste water to 6.1；
(2) waste water circulation requires metal cyanogen complex ion content lower than 20mg/L.Continue stirring, is added into waste water
100g/m3Cetyl trimethylammonium bromide, wadding body test residual metal cyanogen complex ion concentration in water and are higher than 20mg/L after being formed,
Cetyl trimethylammonium bromide dosage is continued growing, until residual metal cyanogen complex ion concentration is lower than 20mg/L；
(3) waste water is imported in mining flotation column, air flotation, froth pulp is the flocculent deposit of the complex ion of cyanogen containing metal
Substance；
(4) the remaining underflow waste water of dissolved air flotation imports coagulation reaction tank, successively in the case where 170 revs/min of revolving speeds stir
Add aluminium polychloride 10g/m3With polyacrylamide 2g/m3Coagulating is carried out, waste water enters sedimentation basin standing sedimentation after coagulation
120min；
(5) the supernatant liquid after precipitating returns to the technological process of production.
Embodiment 3：
Certain gold ore cyanide wastewater, pH value 11, total cyanogen 1700mg/L, content of copper ion 530mg/L, lead ion contain
Amount is 8mg/L, additionally contains a small amount of gold, silver plasma.
(1) in pretreatment reaction pond, on-line checking pH value of waste water, with 180 revs/min of stirring waste water, in whipping process
It is slowly added dilute sulfuric acid and adjusts pH value of waste water to 6.5；
(2) waste water circulation requires metal cyanogen complex ion content lower than 15mg/L.Continue stirring, is added into waste water
100g/m3Dioctadecyl dimethyl ammonium chloride, wadding body test residual metal cyanogen complex ion concentration in water and are higher than 15mg/ after being formed
L continues growing dioctadecyl dimethyl ammonium chloride dosage, until residual metal cyanogen complex ion concentration is lower than 15mg/L；
(3) waste water is imported in water process airfloat equipment, air flotation, froth pulp is the wadding of the complex ion of cyanogen containing metal
Shape deposit；
(4) the remaining underflow waste water of dissolved air flotation imports coagulation reaction tank, successively in the case where 200 revs/min of revolving speeds stir
Add aluminium polychloride 7g/m3With polyacrylamide 3g/m3Coagulating is carried out, waste water enters sedimentation basin standing sedimentation after coagulation
60min；
(5) the supernatant liquid after precipitating returns to the technological process of production.
Claims (6)
1. metal top cradle and wastewater recycling method in a kind of precipitating-gas floatation process recycling Cyanide Wastewater of Gold Mine, feature
It is, includes the following steps：
(1) pH value is adjusted：Dilute sulfuric acid is slowly added into cyanide wastewater in whipping process, adjusts the pH value of cyanide wastewater to 6-
7；
(2) precipitation reaction：In the case where continuing stirring, metal cyanogen complex ion collecting agent is quantitatively added into cyanide wastewater, contains cyanogen
Waste water reaction generates flocculent deposit；
(3) dissolved air flotation：Cyanide wastewater is imported into airfloat equipment and carries out air-flotation process, the froth pulp of floating is the network of cyanogen containing metal
The deposit of ion；
(4) coagulating sedimentation：The remaining underflow of dissolved air flotation is imported into coagulation reaction tank, cohesion is successively added under stirring
Agent and flocculant carry out coagulating, and the cyanide wastewater after coagulation is sent into sedimentation basin standing sedimentation 30min-120min；
(5) the supernatant liquid after precipitating returns to be recycled in the technological process of production.
2. metal top cradle and waste water circulation in precipitating according to claim 1-gas floatation process recycling Cyanide Wastewater of Gold Mine
Utilize method, it is characterised in that：The metal cyanogen complex ion collecting agent is quaternary ammonium salt substance, such as octadecyl trimethyl chlorine
Change ammonium.
3. metal top cradle and waste water follow in precipitating according to claims 1 and 2-gas floatation process recycling Cyanide Wastewater of Gold Mine
Ring utilizes method, it is characterised in that：The dosage of the metal cyanogen complex ion collecting agent is according to waste water 100g metal cyanogen per ton
Complex ion collecting agent adds, and flocculent deposit tests underwater gold category cyanogen complex ion residual volume after being formed, if being higher than processing requirement, after
Continuous addition collecting agent, until at or below processing requirement.
4. metal top cradle and waste water circulation in precipitating according to claim 1-gas floatation process recycling Cyanide Wastewater of Gold Mine
Utilize method, it is characterised in that：The airfloat equipment is mining flotation device, flotation column or water process airfloat equipment.
5. metal top cradle and waste water circulation in precipitating according to claim 1-gas floatation process recycling Cyanide Wastewater of Gold Mine
Utilize method, it is characterised in that：The flocculating agent is aluminium polychloride, additive amount 5g/m3-10g/m3。
6. metal top cradle and waste water circulation in precipitating according to claim 1-gas floatation process recycling Cyanide Wastewater of Gold Mine
Utilize method, it is characterised in that：The flocculant is polyacrylamide, additive amount 1g/m3-3g/m3。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810722723.0A CN108821472A (en) | 2018-07-04 | 2018-07-04 | Metal top cradle and wastewater recycling method in precipitating-gas floatation process recycling Cyanide Wastewater of Gold Mine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110642348A (en) * | 2019-09-30 | 2020-01-03 | 郑州大学 | Method for treating cyanide-containing wastewater by complexing-ion flotation method |
| CN112028338A (en) * | 2020-09-24 | 2020-12-04 | 广东省科学院资源综合利用研究所 | Wastewater treatment method for recovering copper from electroplating wastewater containing cyanogen and copper |
| CN112264196A (en) * | 2020-08-20 | 2021-01-26 | 中国恩菲工程技术有限公司 | Reagent for recycling polymetallic sulfide ore flotation backwater and application thereof |
| CN115583766A (en) * | 2022-11-04 | 2023-01-10 | 中国科学院过程工程研究所 | Method for treating cyanide-containing wastewater |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110642348A (en) * | 2019-09-30 | 2020-01-03 | 郑州大学 | Method for treating cyanide-containing wastewater by complexing-ion flotation method |
| CN110642348B (en) * | 2019-09-30 | 2022-01-25 | 郑州大学 | Method for treating cyanide-containing wastewater by complexing-ion flotation method |
| CN112264196A (en) * | 2020-08-20 | 2021-01-26 | 中国恩菲工程技术有限公司 | Reagent for recycling polymetallic sulfide ore flotation backwater and application thereof |
| CN112028338A (en) * | 2020-09-24 | 2020-12-04 | 广东省科学院资源综合利用研究所 | Wastewater treatment method for recovering copper from electroplating wastewater containing cyanogen and copper |
| CN115583766A (en) * | 2022-11-04 | 2023-01-10 | 中国科学院过程工程研究所 | Method for treating cyanide-containing wastewater |
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Application publication date: 20181116 |