CN102701339B - Recovery processing method of cyanide barren solution - Google Patents
Recovery processing method of cyanide barren solution Download PDFInfo
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- CN102701339B CN102701339B CN201210185039.6A CN201210185039A CN102701339B CN 102701339 B CN102701339 B CN 102701339B CN 201210185039 A CN201210185039 A CN 201210185039A CN 102701339 B CN102701339 B CN 102701339B
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- cyanide
- barren solution
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Abstract
The invention relates to a recovery processing method of cyanide barren solution, which comprises the following steps: at first, ammonia water is added in the cyanide barren solution, the mass ratio of the ammonia water and the cyanide barren solution is 0.5% to 2%; then the cyanide barren solution in which the ammonia water is added is pumped into an electrodialysis device, CN<-> in the cyanide barren solution passes through an anion-exchange membrane and enters a sodium cyanide recovery chamber under the action of a direct-current electric filed, metal cations such as Cu<2+> and Zn<2+> pass through a cation-exchange membrane and enter a metal ion recovery chamber, CN<-> is continuously released from a cyano complex in the cyanide barren solution along with the continuous decrease of CN<-> and heavy metal cations such as Cu<2+> and Zn<2+>, metal ions such as Cu<2+> and Zn<2+> and NH3 are continuously released from a copper-zinc metal ammino complex, so that cyanide ion CN<-> in the cyano complex is promoted to be released, and sodium cyanide and metal ions are recovered. The method can reduce the treatment cost of the cyanide barren solution, remarkably improves the recovery rate and the purity of cyanide ions in the cyanide barren solution, and removes the copper, zinc and other heavy metal ions in the cyanide barren solution.
Description
Technical field:
The present invention relates to a kind of cyanide barren solution recovery and treatment method, belong to the recovery and utilization technology field of carrying golden cyanide barren solution in gold smelting.
Background technology:
Cyanide gold-leaching method is a kind of ancient technology for gold of carrying, and the method technical maturity remains the method for the topmost extraction gold and silver of domestic and international solution of gold smelting plant at present.Along with the reinforcement of people to environmental protection consciousness, the zero release of cyanide wastewater is more and more subject to people's attention.The method of cyaniding sewage zero-discharge is to leach lean solution closed cycle at present, but the existence due to associated minerals such as copper a large amount of in some gold ore, zinc, the concentration of the metel complex ions such as the copper in cyanide barren solution, zinc can be more and more higher, and this will seriously affect golden cyanide leaching.Now the treatment process of cyanide barren solution is mainly to adopt in acidization precipitation-again and circulation method, although this method can make prussiate obtain good utilization, but metal ion wherein is not well recycled, produce a large amount of waste residues, and this treating processes technique is more complicated, and cost is higher.
Summary of the invention:
The object of the invention is to overcome the shortcoming of prior art, a kind of cyanide barren solution recovery and treatment method is provided, the inventive method can reduce the processing cost of cyanide barren solution, significantly improve the rate of recovery and the purity of the cyanide ion in cyanide barren solution, the heavy metal ion such as the copper in removal cyanide barren solution, zinc.
In order to realize foregoing invention object, a kind of cyanide barren solution recovery and treatment method of the present invention, operation in accordance with the following steps: first add ammoniacal liquor in cyanide barren solution to be dealt with, the amount that adds ammoniacal liquor is 0.5% ~ 2% of cyanide barren solution quality, destroy metal ion and the running balance of cyanide ion in solution, the metal ions such as ammonia and copper, zinc form complex compound, discharge the cyanide ion CN in the metal cyano complexs such as copper, zinc
-; Again by adding the cyanide barren solution of ammoniacal liquor to be sent to the feed liquid chamber in electrodialysis unit by recycle pump, under the effect of DC electric field, the CN in cyanide barren solution
-through 1-1 valency anion-exchange membrane, enter into sodium cyanide and reclaim chamber, the Cu in cyanide barren solution
2+, Zn
2+deng metallic cation, through cationic exchange membrane, enter into metal ion recovery chamber, along with CN-and Cu
2+, Zn
2+deng the continuous minimizing of metallic cation, in cyanide barren solution, complex compound constantly discharges CN
-, and along with Cu
2+, Zn
2+deng metallic cation, constantly reduce, the balance of the metal ammonia complexs such as copper zinc is also broken, and constantly discharges Cu
2+, Zn
2+deng metal ion and NH
3, further promote the cyanide ion CN in cyano complex
-release, reclaim sodium cyanide and metal ion, finally reach the effect of Separation and Recovery cyanide barren solution.
Its reaction principle is as follows:
Cyano complex is resolved
Metal ion is resolved
Electrodialysis unit of the present invention adopts six compartment electrodialysis, be cathode compartment, anolyte compartment, metabisulfite solution chamber, metal ion reclaims chamber, feed liquid chamber, sodium cyanide reclaims chamber, adds the cyanide barren solution of ammoniacal liquor by recycle pump, to be sent in the feed liquid chamber of electrodialysis unit, the CN in the effect blanking liquid chamber of electric field
-through 1-1 valency anion-exchange membrane, enter into sodium cyanide and reclaim chamber, Cu
2+, Zn
2+deng metallic cation, through cationic exchange membrane, enter into metal ion recovery chamber, the SO in two metabisulfite solution chambers
4 2-and Na
+through anion-exchange membrane and cationic exchange membrane, enter into metal ion recovery chamber and sodium cyanide recovery chamber respectively, carry out reuse after circular treatment, the metal ion simultaneously reclaiming can further extract and carry out metal recovery; In cathode and anode chamber, be that sodium sulfate electrolyte solution also circulates with recycle pump respectively.
The anion-exchange membrane of recovery cyanide ion of the present invention is 1-1 valency anion-exchange membrane.
The yin, yang ion-exchange membrane of electrodialysis unit of the present invention, be in Fig. 1 between dotted line the group number of part AM-CM-(1-AM)-CM be 1 ~ 50, AM is anion-exchange membrane, CM is cationic exchange membrane, 1-AM is 1-1 valency anion-exchange membrane, yin, yang ion-exchange membrane width is 100 ~ 1000mm, and yin, yang ion-exchange film length is 150 ~ 1600mm, and current density is 5 ~ 30mA/cm
2.
The inventive method adds ammoniacal liquor in cyanide barren solution, has destroyed the balance of metal cyano complex in cyanide barren solution, and cyanide ion is discharged; Adopt electrodialysis to reclaim and improved recovering effect cyanide barren solution, utilize monovalent anion exchange membrane to unit price CN
-selectivity, improved the purity of sodium cyanide, prevented that negative valency metal cyano complex ion from entering into sodium cyanide and reclaiming liquid simultaneously.
Accompanying drawing explanation:
Fig. 1 is the structural representation of the electrodialysis unit that adopts in the inventive method.
Embodiment:
Below in conjunction with accompanying drawing and by specific embodiment, the inventive method is described further.
In the inventive method, adopt the electrodialysis unit of six cell structure, in Fig. 1,1 and 6 are respectively the anode chamber and the cathode chamber, 2 and 11 is metabisulfite solution chamber, 3 is metal ion recovery chamber, 4 is feed liquid chamber, and 5 for sodium cyanide reclaims chamber, and 7 is anion-exchange membrane (AM), 8 and 10 is cationic exchange membrane (CM), and 9 is 1-1 valency anion-exchange membrane (1-AM).
Yin, yang ion-exchange membrane is of a size of 150 * 100mm, and the effective film area of yin, yang ion-exchange membrane is 88cm
2, 4 groups of films.
Get 1000mL cyanide barren solution and add ammoniacal liquor 10g, the running balance in solution of metal ion and cyanide ion is destroyed, and the metal ions such as ammonia and copper, zinc form complex compound, discharges the cyanide ion CN in the metal cyano complexs such as copper, zinc
-; Then the cyanide barren solution that adds ammoniacal liquor is sent in the feed liquid chamber 4 of electrodialysis unit to the CN in the effect blanking liquid chamber 4 of electric field with recycle pump
-through 1-AM, enter into sodium cyanide and reclaim chamber 5, metal ion enters into metal ion through CM and reclaims chamber 3, the SO in metabisulfite solution chamber 2 and 11
4 2-and Na
+through AM and CM, enter into metal ion recovery chamber 3 and sodium cyanide recovery chamber 5 respectively, carry out reuse after circular treatment, metal ion is recycled through extracting and carries out metal recovery simultaneously.Metabisulfite solution in electrodialysis operational process in cathode and anode chamber is 0.5mol/L, circulates respectively with recycle pump, maintains each chamber flow velocity 5.0cm/s, current density 10mA/cm
2, the cyanide ion rate of recovery reaches 90%.
Claims (2)
1. a cyanide barren solution recovery and treatment method, is characterized in that first in cyanide barren solution, adding ammoniacal liquor, and the amount that adds ammoniacal liquor is 0.5%～2% of cyanide barren solution quality; To add the cyanide barren solution of ammoniacal liquor to be sent in electrodialysis unit by recycle pump again, electrodialysis unit adopts six compartment electrodialysis, it is cathode and anode chamber, metabisulfite solution chamber, metal ion reclaims chamber, feed liquid chamber, sodium cyanide reclaims chamber, add the cyanide barren solution of ammoniacal liquor to be sent in the feed liquid chamber of electrodialysis unit, under the effect of DC electric field, the CN in cyanide barren solution
-through anion-exchange membrane, enter into sodium cyanide and reclaim chamber, Cu
2+, Zn
2+metallic cation enters into metal ion through cationic exchange membrane and reclaims chamber, the SO in two metabisulfite solution chambers
4 2-and Na
+through anion-exchange membrane and cationic exchange membrane, entering into metal ion recovery chamber and sodium cyanide recovery chamber respectively, carry out reuse after circular treatment, is that sodium sulfate electrolyte solution also circulates with recycle pump respectively in cathode and anode chamber; Along with CN
-and Cu
2+, Zn
2+the continuous minimizing of metallic cation, in cyanide barren solution, complex compound constantly discharges CN
-, and along with Cu
2+, Zn
2+metallic cation constantly reduces, and copper zinc metal ammonia complex constantly discharges Cu
2+, Zn
2+metallic cation and NH
3, promote the cyanide ion CN in cyano complex
-release, reclaim sodium cyanide and metal ion; The anion-exchange membrane of described recovery cyanide ion is 1-1 valency anion-exchange membrane.
2. a kind of cyanide barren solution recovery and treatment method according to claim 1, the group number that it is characterized in that yin, yang ion-exchange membrane AM-CM-(the 1-AM)-CM of described electrodialysis unit is 1～50, AM is anion-exchange membrane, CM is cationic exchange membrane, 1-AM is 1-1 valency anion-exchange membrane, yin, yang ion-exchange membrane width is 100～1000mm, and yin, yang ion-exchange film length is 150～1600mm, and current density is 5～30mA/cm
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210185039.6A CN102701339B (en) | 2012-06-07 | 2012-06-07 | Recovery processing method of cyanide barren solution |
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|---|---|---|---|
| CN201210185039.6A CN102701339B (en) | 2012-06-07 | 2012-06-07 | Recovery processing method of cyanide barren solution |
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| CN102701339B true CN102701339B (en) | 2014-01-29 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104925914B (en) * | 2014-03-18 | 2017-07-14 | 中国科学院生态环境研究中心 | Photoelectric combination waste water of the processing containing heavy metal cyanide and the method for reclaiming heavy metal simultaneously |
| CN103951119A (en) * | 2014-04-20 | 2014-07-30 | 厦门世达膜科技有限公司 | Process for treating cyaniding barren liquor by combining membrane separation with two-stage membrane electrodialysis |
| CN104310543B (en) * | 2014-10-17 | 2015-12-30 | 山东奥美环境股份有限公司 | Electroosmose process is separated the method for complex state DTPA and hardness ions |
| CN104451771B (en) * | 2014-11-14 | 2017-05-24 | 烟台正材环保科技有限公司 | Method for removing impurities in cyanogen-containing lean solution in smelting industry for removing gold and silver |
| CN104651880B (en) * | 2015-01-31 | 2017-07-14 | 烟台大学 | The method that a kind of decopper(ing) point cyanogen simultaneous PROCESS FOR TREATMENT silver smelts the lean solution containing cyanogen |
| CN104787861B (en) * | 2015-04-23 | 2016-11-23 | 中国科学技术大学 | A kind of electric extraction process extracting simultaneously and reclaiming metallic element and function organic compound |
| CN108862755A (en) * | 2018-07-23 | 2018-11-23 | 师海荣 | A kind of processing method of nickel cyano complex electroplating wastewater |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4179348A (en) * | 1976-11-03 | 1979-12-18 | Societe Nationale Elf Aquitaine (Production) | Removal of cyanide from waste water |
| CN1516615A (en) * | 2001-06-18 | 2004-07-28 | Electrodialysis of multivalent metal salts | |
| CN101008090A (en) * | 2006-12-27 | 2007-08-01 | 清华大学 | Method for recovering copper from cyanide-containing waste water and related waste water treatment method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63230895A (en) * | 1987-03-18 | 1988-09-27 | Agency Of Ind Science & Technol | Electrode material |
-
2012
- 2012-06-07 CN CN201210185039.6A patent/CN102701339B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4179348A (en) * | 1976-11-03 | 1979-12-18 | Societe Nationale Elf Aquitaine (Production) | Removal of cyanide from waste water |
| CN1516615A (en) * | 2001-06-18 | 2004-07-28 | Electrodialysis of multivalent metal salts | |
| CN101008090A (en) * | 2006-12-27 | 2007-08-01 | 清华大学 | Method for recovering copper from cyanide-containing waste water and related waste water treatment method |
Non-Patent Citations (3)
| Title |
|---|
| JP昭63-230895A 1988.09.27 |
| 氰化贫液电渗析—酸法回收新工艺探讨;王恒全、邢启智;《黄金》;19860630(第6期);第41页左栏第3段，右栏第2段至第42页左栏第1段 * |
| 王恒全、邢启智.氰化贫液电渗析—酸法回收新工艺探讨.《黄金》.1986,(第6期),第41页左栏第3段，右栏第2段至第42页左栏第1段. |
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