CN104193122A - Gold mine cyanided waste residue leaching solution treating method - Google Patents
Gold mine cyanided waste residue leaching solution treating method Download PDFInfo
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- CN104193122A CN104193122A CN201410509887.7A CN201410509887A CN104193122A CN 104193122 A CN104193122 A CN 104193122A CN 201410509887 A CN201410509887 A CN 201410509887A CN 104193122 A CN104193122 A CN 104193122A
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- chlorine dioxide
- treatment
- waste residue
- gold mine
- residue leaching
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Abstract
The invention discloses a gold mine cyanided waste residue leaching solution treating method. The method consists of chemical oxidation treatment, coagulating sedimentation treatment and multistage biological filter treatment; when a cyanided waste residue leaching solution is treated, firstly chlorine dioxide is selected to be used as an oxidant to conduct two-stage oxidation treatment on pollutant in wastewater, for the treated wastewater, pollutants such as suspended particulate matters, heavy metal ions and complex compounds in the wastewater can be removed through a coagulation-sedimentation method, and for a supernatant after the sedimentation, a multistage biological filter treatment system is adopted, so as to remove pollutants residual in the wastewater. According to the characteristics, of being complex in contained pollutants and hard to treat, of the gold mine cyanided waste residue leaching solution, a chemical oxidation method, a coagulating sedimentation method and a biological filter treatment technology are combined together so as to synergistically conduct advanced treatment on the cyanided waste residue leaching solution; the method has the advantages that the treatment effect is good, the treatment efficiency is high, the system running is stable, the technological process is simple, and realization of industrial application is facilitated; the treated wastewater can be returned to the production technology process to be used as recycled water to be used or be discharged after reaching the standard.
Description
Technical field
The present invention relates to field of Environment Protection Pollutant Treatment method, particularly a kind for the treatment of process of gold mine cyaniding waste residue leaching liquor.
Background technology
Gold mine in recovery process owing to using Cyanide Process, can produce a large amount of cyaniding waste residues, these cyaniding waste residues can produce a large amount of leaching liquors in the process of drenching with rain, in these leaching liquors, not only contain a certain amount of hypertoxic prussiate, but also contain thiocyanate-and copper, zinc, plumbous and so on heavy metal ion, if can not get effective processing, will produce great environmental protection hidden danger.At present, the method of conventional Treatment of Cyanide-containing Wastewater has acidifying absorption method, Pomolio-Celdecor process, Yin Kefa, sulfurous gas method etc. both at home and abroad, although adopt acidifying absorption method can reclaim a certain amount of prussiate, but because recovery of cyanide is not thorough, the remaining a certain amount of prussiate of meeting in waste water, thiocyanate ion and some heavy metal ion are not all effectively removed simultaneously.Chlorine residue that can be remaining a large amount of after Pomolio-Celdecor process processing, produces ClCN product, causes secondary pollution problem, and the heavy metal ion such as the copper in while waste water, zinc, lead fail effectively to be administered.Although Yin Kefa and sulfurous gas method can make cyanid up to standard, the thiocyanate-in waste water fails to be effectively addressed, and in addition, processes the waste residue producing in heavy metal process also more, easily causes secondary pollution.Therefore, also still lacking more satisfactory method aspect cyanide wastewater processing, if resolve this problem, the Sustainable development of Jiang Dui China gold industry and the environment protection of gold mine have important meaning.
Summary of the invention
Object of the present invention is exactly the problems referred to above that exist for existing treatment process, and the cyaniding waste residue leaching liquor that a kind of technical process is simple, treatment effect good, processing efficiency is high, stable treatment process is provided.The present invention is according to the feature that contains the multiple pollutants such as prussiate, thiocyanate-and heavy metal in gold mine cyaniding waste residue leaching liquor, first select dioxide peroxide, as oxygenant, the pollutent in waste water is carried out to two-stage oxidation processing, waste water after processing is removed the pollutents such as suspended particulate in waste water, heavy metal ion and complex compound by coagulant sedimentation, the supernatant liquor after precipitation adopts multi-stage biological filter tank treatment system to remove pollutent remaining in waste water.Concrete technology step of the present invention is as follows:
(1) cyanide wastewater, after grid filtration, is delivered to wastewater equalization pond or agitated pool, adds acid-base reagent and regulates between wastewater pH to 9～11.5;
(2) waste water regulating enters chlorine dioxide treatment system, passes into Chlorine Dioxide Oxidation and processes 15min～120min;
(3) waste water after processing is delivered to chlorine dioxide treatment system after regulating between pH to 7.5～9, passes into Chlorine Dioxide Oxidation reaction 15min～120min;
(4) reacted waste water adds successively flocculation agent and flocculation agent carries out coagulating sedimentation under whipped state, and after coagulation, waste water enters settling tank and staticly settles 15min～120min;
(5) supernatant liquor after precipitation enters multi-stage biological filter tank treatment system, under the condition of biologic packing material, biofilm bacterial classification and air aeration, carries out a biological disposal upon;
(6) waste water after finishing dealing with returns in the technological process of production or qualified discharge.
In described step (1), acid-base reagent is sulfuric acid, hydrochloric acid, sodium hydroxide solution or milk of lime.
In described step (2) and step (3), chlorine dioxide treatment system is comprised of chlorine dioxide generator and chlorine dioxide treatment device, chlorine dioxide generator is for generation of processing required chlorine dioxide, chlorine dioxide treatment device inside is provided with dioxide peroxide aerator, passes into chlorine dioxide during for the treatment of reaction.
In described step (4), flocculation agent is polymer-inorganic salt flocculation agent, and flocculation agent is polyacrylamide, and flocculation agent and flocculation agent are all mixed with solution state and add.
In described step (5), multi-stage biological filter tank treatment system is that 2～6 grades of biological filters are composed in series mutually, every grade of biological filter is upflowing or downflow system reaction tank, at the bottom of pond, be provided with water-distributing device and aerating apparatus, aerating apparatus top is gac, zeolite or biological potsherd filling layer, loadings accounts for 1/5～4/5 of reactor volume, biofilm bacterial classification is for falling cyanogen flora, comprise Pseudomonas fluorescens, pseudomonas putida, Pseudomonas stutzeri, Nocardia bacteria, genus bacillus etc., be collected near the topsoil of Tailings Dam, bacterial classification biofilm mode takes manually to add bacterial classification biofilm or Biofilmculturing, vapour-liquid ratio is set as 1～15:1.
Beneficial effect of the present invention:
The present invention is according to, unmanageable feature complicated containing pollutent in gold mine cyaniding waste residue leaching liquor, chemical oxidization method, coagulant sedimentation and biological filter treatment technology are combined, work in coordination with cyaniding waste residue leaching liquor is carried out to advanced treatment, have advantages of that treatment effect is good, processing efficiency is high, system run all right, technical process are simple, be convenient to realize industrial application, the waste water after processing can return to the technological process of production and use or qualified discharge as reuse water.
Embodiment
The present invention includes following steps:
(1) cyanide wastewater, after grid filtration, is delivered to wastewater equalization pond or agitated pool, adds acid-base reagent and regulates between wastewater pH to 9～11.5;
(2) waste water regulating enters chlorine dioxide treatment system, passes into Chlorine Dioxide Oxidation and processes 15min～120min;
(3) waste water after processing is delivered to chlorine dioxide treatment system after regulating between pH to 7.5～9, passes into Chlorine Dioxide Oxidation reaction 15min～120min;
(4) reacted waste water adds successively flocculation agent and flocculation agent carries out coagulating sedimentation under whipped state, and after coagulation, waste water enters settling tank and staticly settles 15min～120min;
(5) supernatant liquor after precipitation enters multi-stage biological filter tank treatment system, under the condition of biologic packing material, biofilm bacterial classification and air aeration, carries out a biological disposal upon;
(6) waste water after finishing dealing with returns in the technological process of production or qualified discharge.
In described step (1), acid-base reagent is sulfuric acid, hydrochloric acid, sodium hydroxide solution or milk of lime.
In described step (2) and step (3), chlorine dioxide treatment system is comprised of chlorine dioxide generator and chlorine dioxide treatment device, chlorine dioxide generator is for generation of processing required chlorine dioxide, chlorine dioxide treatment device inside is provided with dioxide peroxide aerator, passes into chlorine dioxide during for the treatment of reaction.
In described step (4), flocculation agent is polymer-inorganic salt flocculation agent, and flocculation agent is polyacrylamide, and flocculation agent and flocculation agent are all mixed with solution state and add.
In described step (5), multi-stage biological filter tank treatment system is that 2～6 grades of biological filters are composed in series mutually, every grade of biological filter is upflowing or downflow system reaction tank, at the bottom of pond, be provided with water-distributing device and aerating apparatus, aerating apparatus top is gac, zeolite or biological potsherd filling layer, loadings accounts for 1/5～4/5 of reactor volume, biofilm bacterial classification is for falling cyanogen flora, comprise Pseudomonas fluorescens, pseudomonas putida, Pseudomonas stutzeri, Nocardia bacteria, genus bacillus etc., be collected near the topsoil of Tailings Dam, bacterial classification biofilm mode takes manually to add bacterial classification biofilm or Biofilmculturing, vapour-liquid ratio is set as 1～15:1.
Specific examples 1:
Certain gold mine cyaniding waste residue leaching liquor, pH is 9.6, CN
tfor 226.25mg/L, SCN
-for 78.24mg/L, Cu
2+for 65.86mg/L, Fe
3+for 7.26mg/L, COD is 214.28mg/L, contains in addition other heavy metal ion of trace.Get 5L waste water and be placed in chlorine dioxide treatment system, open chlorine dioxide generator, pass into dioxide peroxide and react 30min, dioxide peroxide intake is 1.5g, after finishing, reaction closes chlorine dioxide generator, waste water is moved in steel basin, open and stir, stirring linear velocity, be the sulphuric acid soln adjusting pH to 8.0 that is 1% with mass percentage concentration under 0.8m/s condition, the waste water regulating is moved in chlorine dioxide treatment system, pass into dioxide peroxide and react 30min, dioxide peroxide intake is 1.2g, after finishing, reaction closes chlorine dioxide generator, waste water is moved in steel basin, open and stir, stirring linear velocity, be that the polymeric aluminum chlorides solution 15mL that adds 10g/L under 0.8m/s condition stirs 5min, then adding mass percentage concentration is 0.5 ‰ anionic polyacrylamide solution 5mL, after continuing to stir 2min, regulate stirring linear velocity 0.1m/s to stir 5min, stop stirring, standing 30min, with peristaltic pump, supernatant liquor is moved in the treatment system of multi-stage biological filter tank and is processed, multi-stage biological filter tank treatment system adopts two-stage upstream biological filter to be in series, every grade of biological filter filling filler is particulate coal activated carbon, amount of fill is 5kg, air aeration device adopts Ti-alloyed filter element, be placed in reactor bottom, vapour-liquid ratio is set as 3:1, reactor carries out biofilm by manually adding bacterial classification, the waste water reaction residence time is 60min.The water outlet of waste water after system is processed through assay pH between 7～8, CN
t< 0.1mg/L, SCN-< 0.5mg/L, Cu
2+< 0.5mg/L, COD < 20mg/L, first kind pollutent is all within the highest permission emission concentration limit value, and after processing, water quality can reach reuse or emission standard.
Specific examples 2:
Certain gold mine cyaniding waste residue leaching liquor, pH is 8.5, CN
tfor 165.52mg/L, SCN
-for 43.65mg/L, COD is 179.24mg/L, contains in addition other heavy metal ion of trace.Get 5L waste water and be placed in steel basin, stirring linear velocity, be the sodium hydroxide solution adjusting pH to 10.0 that is 1% with mass percentage concentration under 0.8m/s condition, waste water is moved in chlorine dioxide treatment system, open chlorine dioxide generator, pass into dioxide peroxide and react 30min, dioxide peroxide intake is 1.1g, after finishing, reaction closes chlorine dioxide generator, waste water is moved in steel basin, open and stir, stirring linear velocity, be the sulphuric acid soln adjusting pH to 8.0 that is 1% with mass percentage concentration under 0.8m/s condition, the waste water regulating is moved in chlorine dioxide treatment system, pass into dioxide peroxide and react 30min, dioxide peroxide intake is 0.8g, after finishing, reaction closes chlorine dioxide generator, waste water is moved in steel basin, open and stir, stirring linear velocity, be that the polymeric aluminum chlorides solution 5mL that adds 10g/L under 0.8m/s condition stirs 5min, then add 0.5 ‰ anionic polyacrylamide solution 1mL, after continuing to stir 2min, regulate stirring linear velocity 0.1m/s to stir 5min, stop stirring, standing 30min, with peristaltic pump, supernatant liquor is moved in the treatment system of multi-stage biological filter tank and is processed, multi-stage biological filter tank treatment system adopts two-stage upstream biological filter to be in series, every grade of biological filter filling filler is particulate coal activated carbon, amount of fill is 5kg, air aeration device adopts Ti-alloyed filter element, be placed in reactor bottom, vapour-liquid ratio is set as 3:1, reactor carries out biofilm by manually adding bacterial classification, the waste water reaction residence time is 60min.The water outlet of waste water after system is processed through assay pH between 7～8, CN
t< 0.1mg/L, SCN
-< 0.5mg/L, COD < 20mg/L, first kind pollutent is all within the highest permission emission concentration limit value, and after processing, water quality can reach reuse or emission standard.
Claims (6)
1. a gold mine cyaniding waste residue leaching liquor treatment process, the step of the method is as follows:
(1) cyanide wastewater, after grid filtration, is delivered to wastewater equalization pond or agitated pool, adds acid-base reagent and regulates between wastewater pH to 9～11.5;
(2) waste water regulating enters chlorine dioxide treatment system, passes into Chlorine Dioxide Oxidation and processes 15min～120min;
(3) waste water after processing is delivered to chlorine dioxide treatment system after regulating between pH to 7.5～9, passes into Chlorine Dioxide Oxidation reaction 15min～120min;
(4) reacted waste water adds successively flocculation agent and flocculation agent carries out coagulating sedimentation under whipped state, and after coagulation, waste water enters settling tank and staticly settles 15min～120min;
(5) supernatant liquor after precipitation enters multi-stage biological filter tank treatment system, under the condition of biologic packing material, biofilm bacterial classification and air aeration, carries out a biological disposal upon;
(6) waste water after finishing dealing with returns in the technological process of production or qualified discharge.
2. a kind of gold mine cyaniding waste residue leaching liquor treatment process according to claim 1, is characterized in that: in described step (1), acid-base reagent is sulfuric acid, hydrochloric acid, sodium hydroxide solution or milk of lime.
3. a kind of gold mine cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (2) and step (3), chlorine dioxide treatment system is comprised of chlorine dioxide generator and chlorine dioxide treatment device, chlorine dioxide generator is for generation of processing required chlorine dioxide, chlorine dioxide treatment device inside is provided with dioxide peroxide aerator, passes into chlorine dioxide during for the treatment of reaction.
4. a kind of gold mine cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (4), flocculation agent is polymer-inorganic salt flocculation agent, and flocculation agent is polyacrylamide, and flocculation agent and flocculation agent are all mixed with solution state and add.
5. a kind of gold mine cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (5), multi-stage biological filter tank treatment system is that 2～6 grades of biological filters are composed in series mutually, every grade of biological filter is upflowing or downflow system reaction tank, at the bottom of pond, be provided with water-distributing device and aerating apparatus, aerating apparatus top is gac, zeolite or biological potsherd filling layer, and loadings accounts for 1/5～4/5 of reactor volume.
6. a kind of gold mine cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (5), multi-stage biological filter tank treatment system biofilm bacterial classification is for falling cyanogen flora, comprise Pseudomonas fluorescens, pseudomonas putida, Pseudomonas stutzeri, Nocardia bacteria, genus bacillus etc., be collected near the topsoil of Tailings Dam, bacterial classification biofilm mode is taked manually to add bacterial classification biofilm or Biofilmculturing, and vapour-liquid ratio is set as 1～15:1.
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| CN104193122B CN104193122B (en) | 2016-08-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556487A (en) * | 2015-01-01 | 2015-04-29 | 长春黄金研究院 | Method for comprehensive recovery and treatment of cyanide wastewater |
| CN106957115A (en) * | 2017-04-05 | 2017-07-18 | 绍兴柯桥江滨水处理有限公司 | A kind of processing system and processing method of sulfur-bearing cyanogen waste water |
| CN111494866A (en) * | 2020-05-10 | 2020-08-07 | 浙江澄宇环保新材料股份有限公司 | Process for screening and repairing tailing slag |
| CN113754042A (en) * | 2021-08-27 | 2021-12-07 | 内蒙古金陶股份有限公司 | Decyanation treatment method and system for cyanided tailings |
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| CN1569694A (en) * | 2003-07-18 | 2005-01-26 | 东莞市天虹环保工程有限公司 | Deep purification and reclaiming device and method for dyeing waste water |
| JP2011000558A (en) * | 2009-06-22 | 2011-01-06 | Nippon Steel Engineering Co Ltd | Method for treating ground water contaminated with cianide |
| CN103253834A (en) * | 2013-06-04 | 2013-08-21 | 长春黄金研究院 | Deep treatment method for cyanide-containing waste water of tailings pond in gold industry |
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2014
- 2014-09-27 CN CN201410509887.7A patent/CN104193122B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1569694A (en) * | 2003-07-18 | 2005-01-26 | 东莞市天虹环保工程有限公司 | Deep purification and reclaiming device and method for dyeing waste water |
| JP2011000558A (en) * | 2009-06-22 | 2011-01-06 | Nippon Steel Engineering Co Ltd | Method for treating ground water contaminated with cianide |
| CN103253834A (en) * | 2013-06-04 | 2013-08-21 | 长春黄金研究院 | Deep treatment method for cyanide-containing waste water of tailings pond in gold industry |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556487A (en) * | 2015-01-01 | 2015-04-29 | 长春黄金研究院 | Method for comprehensive recovery and treatment of cyanide wastewater |
| CN106957115A (en) * | 2017-04-05 | 2017-07-18 | 绍兴柯桥江滨水处理有限公司 | A kind of processing system and processing method of sulfur-bearing cyanogen waste water |
| CN111494866A (en) * | 2020-05-10 | 2020-08-07 | 浙江澄宇环保新材料股份有限公司 | Process for screening and repairing tailing slag |
| CN111494866B (en) * | 2020-05-10 | 2021-07-23 | 浙江澄宇环保新材料股份有限公司 | Process for screening and repairing tailing slag |
| CN113754042A (en) * | 2021-08-27 | 2021-12-07 | 内蒙古金陶股份有限公司 | Decyanation treatment method and system for cyanided tailings |
| CN113754042B (en) * | 2021-08-27 | 2023-09-22 | 内蒙古金陶股份有限公司 | Decyanation treatment method and system for cyanide tailings |
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|---|---|
| CN104193122B (en) | 2016-08-17 |
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Address after: 130012 nanhu road, Jilin, Changchun, No. 6760 Patentee after: Changchun Gold Research Institute Co., Ltd. Address before: 130012 nanhu road, Jilin, Changchun, No. 6760 Patentee before: Changchun Gold Research Institute |
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