CN104909501A - Comprehensive treatment process for cyanide-containing tailings - Google Patents
Comprehensive treatment process for cyanide-containing tailings Download PDFInfo
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- CN104909501A CN104909501A CN201510320841.5A CN201510320841A CN104909501A CN 104909501 A CN104909501 A CN 104909501A CN 201510320841 A CN201510320841 A CN 201510320841A CN 104909501 A CN104909501 A CN 104909501A
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Abstract
The invention discloses a comprehensive treatment process for cyanide-containing tailings. The process consists of the following five steps: size mixing, resin adsorption, ozone oxidation, chemical catalytic oxidation and solid-liquid separation and deep standard treatment. The cyanide-containing tailings treatment method comprises the following steps: recycling cyanides and valuable metal ions in ore pulp by adopting a resin, removing the residual pollutants in the ore pulp for performing solid-liquid separation by adopting a chemical oxidation method, performing harmless storage on the tailings, continuously performing size mixing on the tailings in the pulp or further performing standard treatment emission. According to the characteristic that the pollutants contained in cyanide-containing tailings of a gold mine are complex and difficult to treat, a mode of recycling the valuable resources in the ore pulp by using a size mixing resin and performing stepped oxidation treatment is adopted, recycling and harmless treatment of the tailings can be realized, the size mixing solution is recycled or subjected to up-to-standard release, and the process has the advantages of good treatment effect, high treatment efficiency, stable system operation, simple and practical process flow, convenience in implementation of industrial application and the like.
Description
Technical field
The present invention relates to field of Environment Protection Pollutant Treatment method, particularly a kind of cyanogen-containing tailing slag for comprehensive treatment process.
Background technology
Because the most of gold mine of China adopts Cyanide Process always, in golden production process, produce a large amount of cyanogen waste residue that contains is deposited in Tailings Dam, along with the expansion of golden production scale and the prolongation of production history, accumulating amount containing cyanogen waste residue is increasing year by year, take a large amount of soil, these waste residues are due to containing prussiate and heavy metal, become the ubiquitous Hazardous wastes of gold mine enterprise, at Tailings Dam Anti-seeping technology improper or maintenance management not in time time, will ooze because drenching with rain down to produce surrounding enviroment and underground water containing prussiate in cyanogen waste residue and pollute.Along with the appearance of new environmental law is implemented, the gold mine enterprise of domestic cyanidation technology is in the urgent need to realizing repair process to the cyanogen waste residue that contains of Tailings Dam, reduce the content of prussiate and heavy metal in waste residue, make Hazardous wastes become general solid waste, thus realize the recycling of waste residue further.From current domestic gold industry containing cyanogen Solid state fermentation situation, still there is no advanced and mature cyanogen-containing tailing residues processing technique.
Summary of the invention
Object of the present invention is exactly the problems referred to above existed for existing treatment process, and provides the cyanogen-containing tailing residues processing technique that a kind of technical process is simple, treatment effect good, processing efficiency is high, stable.
The present invention is according to the feature containing multiple pollutants such as prussiate, thiocyanate-and heavy metals in gold mine cyanogen-containing tailing slag, add water after sizing mixing, first after adopting resin the prussiate in ore pulp and valuable metal ions to be reclaimed, then adopt Ozonation and chemical catalytic oxidation method by pollutant removal remaining in ore pulp, then solid-liquid separation is carried out, mine tailings are innoxious to be stored up, and slurries proceed sizing mixing of mine tailings or further process discharge up to standard.
The present invention includes following steps:
(1), size mixing: get mine tailings and add water and to size mixing under whipped state process, size mixing time at least 10min;
(2), resin absorption process: the ore pulp evenly of sizing mixing adds resin and carries out adsorption treatment, adsorption treatment time at least 30min;
(3), resin isolation: the ore pulp after adsorption treatment adopts filter type to carry out resin isolation, and the resin after separation carries out desorb and manipulation of regeneration, and the ore pulp after separation carries out ozone Oxidation Treatment;
(4), ozone Oxidation Treatment: the ore pulp after separation is placed in ozone oxidation groove, and pass into ozone and carry out oxide treatment from the micro-hole aerator of reactor bottom, the treatment time is 30min at least;
(5), pH regulator: the ore pulp after ozone Oxidation Treatment adds acid medicine and regulates between slurry pH to 7 ~ 9, if the slurry pH after ozone Oxidation Treatment is between 7 ~ 9, can regulate;
(6), hydrogen peroxide oxidation process: regulated the ore pulp of pH value to add hydrogen peroxide reagent under whipped state and carried out oxide treatment, or added hydrogen peroxide reagent and copper sulfate reagent and carry out catalytic oxidation treatment;
(7), solid-liquid separation: the ore pulp after hydrogen peroxide oxidation process carries out solid-liquid separation by the solid-liquid separation method of thickener, settling tank, filter, whizzer, slag after separation enters slag field and stores up or prepare architecture engineering material, slurries after separation turn back to the process of sizing mixing of next round mine tailings, or are further processed;
(8), slurries oxide treatment: the slurries after solid-liquid separation pass into ozone or add hydrogen peroxide or add ozone and hydrogen peroxide carries out oxide treatment simultaneously;
(9), activated carbon catalysis oxide treatment: the slurries after oxide treatment are passed in activated carbon catalysis oxide treatment reactor, pass into air, carry out activated carbon catalysis oxide treatment;
(10), qualified discharge: the slurries qualified discharge after activated carbon catalysis oxide treatment.
In described step (1), the mass ratio of sizing mixing of mine tailings and water is 1:1 ~ 1:10.
In described step (2), resin is strongly basic anion macroporous resin, and resin amount is determined according to prussiate in ore pulp and the content of valuable metal ions and the loading capacity of resin.
In described step (4), the material of micro-hole aerator is stainless steel, pottery or titanium alloy, and the intake of ozone is 2 ~ 8 times of the pollutent quality sum of prussiate and COD in ore pulp.
In described step (5), acid medicine is sulfuric acid, hydrochloric acid ferrous sulfate or ferric sulfate.
In described step (6), the add-on of hydrogen peroxide reagent is 0.5 ~ 5 times of the pollutent quality sum of prussiate and COD in ore pulp.
In described step (8), the intake of ozone is 1 ~ 3 times of the pollutent quality sum of prussiate and COD in ore pulp, and the add-on of hydrogen peroxide reagent is 0.5 ~ 2 times of the pollutent quality sum of prussiate and COD in ore pulp.
In described step (9), the vapour-liquid ratio in activated carbon catalysis oxide treatment reactor is 1 ~ 300:1.
Beneficial effect of the present invention:
The present invention is according to, unmanageable feature complicated containing pollutent in gold mine cyanogen-containing tailing slag, resin of sizing mixing is adopted to reclaim valuable resource in ore pulp and the mode of step-by-step oxidation process, realize the resource reclaim to mine tailings and harmless treatment, exchange serum recycle to utilize or qualified discharge, have that treatment effect is good, processing efficiency is high, system run all right, technical process are simple and practical, be convenient to realize the advantages such as industrial application, have broad application prospects.
Embodiment
The present invention includes following steps:
(1), size mixing: get mine tailings and add water and to size mixing under whipped state process, size mixing time at least 10min;
(2), resin absorption process: the ore pulp evenly of sizing mixing adds resin and carries out adsorption treatment, adsorption treatment time at least 30min;
(3), resin isolation: the ore pulp after adsorption treatment adopts filter type to carry out resin isolation, and the resin after separation carries out desorb and manipulation of regeneration, and the ore pulp after separation carries out ozone Oxidation Treatment;
(4), ozone Oxidation Treatment: the ore pulp after separation is placed in ozone oxidation groove, and pass into ozone and carry out oxide treatment from the micro-hole aerator of reactor bottom, the treatment time is 30min at least;
(5), pH regulator: the ore pulp after ozone Oxidation Treatment adds acid medicine and regulates between slurry pH to 7 ~ 9, if the slurry pH after ozone Oxidation Treatment is between 7 ~ 9, can regulate;
(6), hydrogen peroxide oxidation process: regulated the ore pulp of pH value to add hydrogen peroxide reagent under whipped state and carried out oxide treatment, or added hydrogen peroxide reagent and copper sulfate reagent and carry out catalytic oxidation treatment;
(7), solid-liquid separation: the ore pulp after hydrogen peroxide oxidation process carries out solid-liquid separation by the solid-liquid separation method of thickener, settling tank, filter, whizzer, slag after separation enters slag field and stores up or prepare architecture engineering material, slurries after separation turn back to the process of sizing mixing of next round mine tailings, or are further processed;
(8), slurries oxide treatment: the slurries after solid-liquid separation pass into ozone or add hydrogen peroxide or add ozone and hydrogen peroxide carries out oxide treatment simultaneously;
(9), activated carbon catalysis oxide treatment: the slurries after oxide treatment are passed in activated carbon catalysis oxide treatment reactor, pass into air, carry out activated carbon catalysis oxide treatment;
(10), qualified discharge: the slurries qualified discharge after activated carbon catalysis oxide treatment.
In described step (1), the mass ratio of sizing mixing of mine tailings and water is 1:1 ~ 1:10.
In described step (2), resin is strongly basic anion macroporous resin, and resin amount is determined according to prussiate in ore pulp and the content of valuable metal ions and the loading capacity of resin.
In described step (4), the material of micro-hole aerator is stainless steel, pottery or titanium alloy, and the intake of ozone is 2 ~ 8 times of the pollutent quality sum of prussiate and COD in ore pulp.
In described step (5), acid medicine is sulfuric acid, hydrochloric acid ferrous sulfate or ferric sulfate.
In described step (6), the add-on of hydrogen peroxide reagent is 0.5 ~ 5 times of the pollutent quality sum of prussiate and COD in ore pulp.
In described step (8), the intake of ozone is 1 ~ 3 times of the pollutent quality sum of prussiate and COD in ore pulp, and the add-on of hydrogen peroxide reagent is 0.5 ~ 2 times of the pollutent quality sum of prussiate and COD in ore pulp.
In described step (9), the vapour-liquid ratio in activated carbon catalysis oxide treatment reactor is 1 ~ 300:1.
Specific examples:
Certain gold mine cyanogen-containing tailing slag, CN
tfor 413.47mg/kg, Cu
2+for 82.56mg/kg, COD are 187.25mg/kg, other heavy metal ion in addition containing trace.Get 1kg mine tailings and be placed in steel basin, add 1kg water, stirring is sized mixing 30min, then strongly basic anion exchange resin 20g is added, filter after adsorption treatment 120min, resin is leached, then the ore pulp after filtration is placed in ozone oxidation groove, pass into ozone and carry out oxidizing reaction 1h, the intake of ozone is 0.76g, then the ore pulp after ozone oxidation is placed in steel basin, add dilute sulphuric acid and regulate slurry pH to 8.0, then the hydrogen peroxide 3mL of 35% is added, filter after reaction 30min, slurries pass into ozone and carry out oxide treatment 30min, ozone intake is 0.08g, after having reacted, slurries are moved in activated carbon catalysis oxidation reactor and carry out catalytic oxidation treatment, vapour-liquid ratio is 100:1, reaction 30min.Mine tailings after filtering are carried out toxicity characteristic leaching procedure analysis, and as shown in Table 1 and Table 2, the slurries after activated carbon catalysis oxide treatment are carried out chemical composition analysis, and result is as shown in table 3 for result.
Table 1 mine tailings poison leaching test-results one
Note: Biao Zhong analysis elements unit is mg/L, pH value is zero dimension.
Table 2 mine tailings poison leaching test-results two
Note: Biao Zhong analytical element unit is mg/L, pH value is zero dimension.
Table 3 slurry content analytical results
| Analytical element | pH | CN T | Cu | Pb | Zn |
| Numerical value | 8.46 | 0.027 | 0.13 | <0.05 | 0.01 |
| Analytical element | Cd | Cr | Cr 6+ | Ni | As |
| Numerical value | <0.01 | <0.03 | <0.004 | <0.01 | 0.028 |
Note: Biao Zhong analytical element unit is mg/L, pH value is zero dimension.
Compare known with related data in " Hazardous wastes judging standard leaching characteristic identification " (GB5085.3-2007), " integrated wastewater discharge standard " (GB 8978-1996) and " general industrial solid waste is stored, disposal site Environmental capacity standard " (GB18599-2001) respectively by table 1 and table 2 result, mine tailings belong to the Ith class general industrial solid waste.Known from the slurries analytical data of table 3, slurries can reach " Groundwater Environmental Quality standard " (GB/T14848-93) III class water quality standard.
Claims (8)
1. a cyanogen-containing tailing slag for comprehensive treatment process, this technique comprises the following steps:
(1), size mixing: get mine tailings and add water and to size mixing under whipped state process, size mixing time at least 10min;
(2), resin absorption process: the ore pulp evenly of sizing mixing adds resin and carries out adsorption treatment, adsorption treatment time at least 30min;
(3), resin isolation: the ore pulp after adsorption treatment adopts filter type to carry out resin isolation, and the resin after separation carries out desorb and manipulation of regeneration, and the ore pulp after separation carries out ozone Oxidation Treatment;
(4), ozone Oxidation Treatment: the ore pulp after separation is placed in ozone oxidation groove, and pass into ozone and carry out oxide treatment from the micro-hole aerator of reactor bottom, the treatment time is 30min at least;
(5), pH regulator: the ore pulp after ozone Oxidation Treatment adds acid medicine and regulates between slurry pH to 7 ~ 9, if the slurry pH after ozone Oxidation Treatment is between 7 ~ 9, can regulate;
(6), hydrogen peroxide oxidation process: regulated the ore pulp of pH value to add hydrogen peroxide reagent under whipped state and carried out oxide treatment, or added hydrogen peroxide reagent and copper sulfate reagent and carry out catalytic oxidation treatment;
(7), solid-liquid separation: the ore pulp after hydrogen peroxide oxidation process carries out solid-liquid separation by the solid-liquid separation method of thickener, settling tank, filter, whizzer, slag after separation enters slag field and stores up or prepare architecture engineering material, slurries after separation turn back to the process of sizing mixing of next round mine tailings, or are further processed;
(8), slurries oxide treatment: the slurries after solid-liquid separation pass into ozone or add hydrogen peroxide or add ozone and hydrogen peroxide carries out oxide treatment simultaneously;
(9), activated carbon catalysis oxide treatment: the slurries after oxide treatment are passed in activated carbon catalysis oxide treatment reactor, pass into air, carry out activated carbon catalysis oxide treatment;
(10), qualified discharge: the slurries qualified discharge after activated carbon catalysis oxide treatment.
2. a kind of cyanogen-containing tailing slag for comprehensive treatment process according to claim 1, is characterized in that: in described step (1), and the mass ratio of sizing mixing of mine tailings and water is 1:1 ~ 1:10.
3. a kind of cyanogen-containing tailing slag for comprehensive treatment process according to claim 1, it is characterized in that: in described step (2), resin is strongly basic anion macroporous resin, and resin amount is determined according to prussiate in ore pulp and the content of valuable metal ions and the loading capacity of resin.
4. a kind of cyanogen-containing tailing slag for comprehensive treatment process according to claim 1, it is characterized in that: in described step (4), the material of micro-hole aerator is stainless steel, pottery or titanium alloy, and the intake of ozone is 2 ~ 8 times of the pollutent quality sum of prussiate and COD in ore pulp.
5. a kind of cyanogen-containing tailing slag for comprehensive treatment process according to claim 1, is characterized in that: in described step (5), and acid medicine is sulfuric acid, hydrochloric acid ferrous sulfate or ferric sulfate.
6. a kind of cyanogen-containing tailing slag for comprehensive treatment process according to claim 1, is characterized in that: in described step (6), and the add-on of hydrogen peroxide reagent is 0.5 ~ 5 times of the pollutent quality sum of prussiate and COD in ore pulp.
7. a kind of cyanogen-containing tailing slag for comprehensive treatment process according to claim 1, it is characterized in that: in described step (8), the intake of ozone is 1 ~ 3 times of the pollutent quality sum of prussiate and COD in ore pulp, and the add-on of hydrogen peroxide reagent is 0.5 ~ 2 times of the pollutent quality sum of prussiate and COD in ore pulp.
8. a kind of cyanogen-containing tailing slag for comprehensive treatment process according to claim 1, it is characterized in that: in described step (9), the vapour-liquid ratio in activated carbon catalysis oxide treatment reactor is 1 ~ 300:1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391674A (en) * | 2016-12-07 | 2017-02-15 | 云南大地绿坤环保科技有限公司 | Harmless treatment method for cyanide-containing waste residues |
| CN110642428A (en) * | 2019-10-30 | 2020-01-03 | 方小兵 | Method for treating ore pulp containing cyanogen, thiocyanide and heavy metal |
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| CN1445374A (en) * | 2003-03-13 | 2003-10-01 | 陈民友 | Technique for handling tailings pulp containing cyanogens by ozone oxidation method |
| JP2005270886A (en) * | 2004-03-25 | 2005-10-06 | Maezawa Ind Inc | Treatment method and apparatus for industrial wastewater |
| CN103086548A (en) * | 2013-03-01 | 2013-05-08 | 长春黄金研究院 | Harmless comprehensive treatment method for cyanide-containing tailing pulp |
| CN103523964A (en) * | 2013-10-25 | 2014-01-22 | 长春黄金研究院 | O&R (Ozone-Resin) harmless treatment process of cyanogens-containing tailing pulp |
| CN104230059A (en) * | 2014-09-27 | 2014-12-24 | 长春黄金研究院 | Method for ozone oxidation comprehensive treatment of cyanide-containing waste water |
| CN104230122A (en) * | 2014-09-29 | 2014-12-24 | 长春黄金研究院 | Gold mine cyaniding waste residue leaching solution treating method |
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2015
- 2015-06-12 CN CN201510320841.5A patent/CN104909501A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1445374A (en) * | 2003-03-13 | 2003-10-01 | 陈民友 | Technique for handling tailings pulp containing cyanogens by ozone oxidation method |
| JP2005270886A (en) * | 2004-03-25 | 2005-10-06 | Maezawa Ind Inc | Treatment method and apparatus for industrial wastewater |
| CN103086548A (en) * | 2013-03-01 | 2013-05-08 | 长春黄金研究院 | Harmless comprehensive treatment method for cyanide-containing tailing pulp |
| CN103523964A (en) * | 2013-10-25 | 2014-01-22 | 长春黄金研究院 | O&R (Ozone-Resin) harmless treatment process of cyanogens-containing tailing pulp |
| CN104230059A (en) * | 2014-09-27 | 2014-12-24 | 长春黄金研究院 | Method for ozone oxidation comprehensive treatment of cyanide-containing waste water |
| CN104230122A (en) * | 2014-09-29 | 2014-12-24 | 长春黄金研究院 | Gold mine cyaniding waste residue leaching solution treating method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391674A (en) * | 2016-12-07 | 2017-02-15 | 云南大地绿坤环保科技有限公司 | Harmless treatment method for cyanide-containing waste residues |
| CN110642428A (en) * | 2019-10-30 | 2020-01-03 | 方小兵 | Method for treating ore pulp containing cyanogen, thiocyanide and heavy metal |
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