CN109502811A - The flocculation sedimentation purification method of Thiocyanate ion in a kind of cyanide wastewater - Google Patents
The flocculation sedimentation purification method of Thiocyanate ion in a kind of cyanide wastewater Download PDFInfo
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- CN109502811A CN109502811A CN201811483901.5A CN201811483901A CN109502811A CN 109502811 A CN109502811 A CN 109502811A CN 201811483901 A CN201811483901 A CN 201811483901A CN 109502811 A CN109502811 A CN 109502811A
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- cyanide
- thiocyanate ion
- flocculation sedimentation
- purification method
- cyanide wastewater
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- 238000000034 method Methods 0.000 title claims abstract description 45
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 239000002351 wastewater Substances 0.000 title claims abstract description 29
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 title claims abstract description 21
- 238000005189 flocculation Methods 0.000 title claims abstract description 14
- 230000016615 flocculation Effects 0.000 title claims abstract description 14
- 238000000746 purification Methods 0.000 title claims abstract description 14
- 238000004062 sedimentation Methods 0.000 title claims abstract description 13
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims abstract description 18
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims abstract description 18
- 239000000706 filtrate Substances 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 5
- 235000011116 calcium hydroxide Nutrition 0.000 claims abstract description 5
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 claims description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Substances [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 claims description 8
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims description 8
- 230000020477 pH reduction Effects 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 230000003311 flocculating effect Effects 0.000 claims description 7
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 7
- 238000005273 aeration Methods 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical class [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims description 5
- 239000012159 carrier gas Substances 0.000 claims description 5
- 230000001172 regenerating effect Effects 0.000 claims description 5
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 4
- -1 sulphur Cyanic acid ion Chemical class 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 235000010755 mineral Nutrition 0.000 claims description 2
- 238000002386 leaching Methods 0.000 abstract description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract description 7
- 239000010931 gold Substances 0.000 abstract description 7
- 229910052737 gold Inorganic materials 0.000 abstract description 7
- 238000003723 Smelting Methods 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 1
- IZLAVFWQHMDDGK-UHFFFAOYSA-N gold(1+);cyanide Chemical compound [Au+].N#[C-] IZLAVFWQHMDDGK-UHFFFAOYSA-N 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 229910021653 sulphate ion Inorganic materials 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000001376 precipitating effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- PDZKZMQQDCHTNF-UHFFFAOYSA-M copper(1+);thiocyanate Chemical compound [Cu+].[S-]C#N PDZKZMQQDCHTNF-UHFFFAOYSA-M 0.000 description 2
- QPJDMGCKMHUXFD-UHFFFAOYSA-N cyanogen chloride Chemical compound ClC#N QPJDMGCKMHUXFD-UHFFFAOYSA-N 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- MVZXTUSAYBWAAM-UHFFFAOYSA-N iron;sulfuric acid Chemical compound [Fe].OS(O)(=O)=O MVZXTUSAYBWAAM-UHFFFAOYSA-N 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910052569 sulfide mineral Inorganic materials 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 235000015210 Fockea angustifolia Nutrition 0.000 description 1
- 244000186654 Fockea angustifolia Species 0.000 description 1
- NMOJAXCSURVGEY-UHFFFAOYSA-N N#CC#N.[S] Chemical compound N#CC#N.[S] NMOJAXCSURVGEY-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- XEIPQVVAVOUIOP-UHFFFAOYSA-N [Au]=S Chemical compound [Au]=S XEIPQVVAVOUIOP-UHFFFAOYSA-N 0.000 description 1
- 230000009102 absorption Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- DOBRDRYODQBAMW-UHFFFAOYSA-N copper(i) cyanide Chemical compound [Cu+].N#[C-] DOBRDRYODQBAMW-UHFFFAOYSA-N 0.000 description 1
- XLJMAIOERFSOGZ-UHFFFAOYSA-N cyanic acid Chemical class OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 229920000592 inorganic polymer Polymers 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 1
- 150000003567 thiocyanates Chemical class 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- 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
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to a kind of flocculation sedimentation purification methods of Thiocyanate ion in cyanide wastewater.It is studied by the purification process to various concentration cyanide wastewater, it is determined that the technological parameters such as solution ph, ferric sulfate, bodied ferric sulfate dosage；First acidified processing recovery of cyanide, cyanide then remaining using ferric sulphate precipitate filtering removal remove Thiocyanate ion using bodied ferric sulfate flocculation sedimentation after filtrate addition milk of lime adjusts pH to cyanide wastewater.The method solves Thiocyanate ion in gold cyaniding smelting wastewater and accumulates; cause lean solution can not normal reuse; and then the problem of influencing normal smelting process, it ensure that gold Cyanide Leaching and subsequent adsorbtion, replace being normally carried out for process, effectively improve smelting recovery.
Description
Technical field
The present invention relates to the precipitation and purification methods of thiocyanate ion in cyanide wastewater, belong to technology for treating industrial waste water neck
Domain.
Background technique
Currently, gold mainly uses hydrometallurgical processes directly to refine from gold sulphide ores, only small part is by pyrogenic process smelting
It is obtained in refining non-ferrous metal byproduct.Cyaniding and leaching process due to production cost is low, the rate of recovery is high, to the adaptable of ore
Etc. advantages, be the main method of current golden production and leading position will be occupied within considerable time.
Although having many advantages using extraction of gold by cyanidation, which can generate a large amount of de- golden lean solutions in process of production.
It is recycled although can be returned by lean solution and leach process, due to containing sulfide mineral, Cyanide Leaching in gold mine mostly
In the process, sulfide mineral can react with cyanide, and final element sulphur can be existed in solution with the formation of thiocyanate, and with
It takes off the recycling of gold lean solution and constantly accumulates.The presence of a large amount of Thiocyanate ions can reduce the leaching of gold in Cyanide Leaching liquid
Rate, in addition, the presence of thiocyanate can reduce golden adsorption rate and adsorption capacity and cause resin when using resin absorption technique
" poisoning " shortens its service life.Therefore, research and development effectively remove the technique of the Thiocyanate ion in cyanide wastewater, for gold
It is particularly important for industry.
Acidization is otherwise known as and is acidified volatilization-alkali absorption method (AVR).The technique is that industrial application is more wide at present
General Treatment of cyanogen-contained wastewater makes to dissociate in waste water the basic principle is that alkali is added in sulfuric acid and protected into cyanide wastewater
Cyanide and the hydrolysis containing cyanide complex generate HCN, while metal ion is gone by forming cyanide or rhodanate precipitating
It removes；Its process can be indicated with following equation:
CuCN+SCN-→CuSCN↓+CN- (3)
The HCN generated after acidification is absorbed after air stripping using sodium hydroxide solution, and the Cymag of generation returns
Leaching metal working sequence is reused；It is recycled after remaining on the concentrated filtering of the sediment in water；Processed waste water is using in lime and residual
Acid is discharged into Tailings Dam natural degradation or direct Returning process.When using the process, the thiocyanate radical in cyanide wastewater is final
Precipitating is generated in the form of CuSCN；But in Cyanide Leaching lean solution, the content of thiocyanate radical is much higher than the amount of copper ion, even if adopting
Thiocyanate radical can not still be completely removed with acidification technique；So the lean solution thiocyanic acid after being recycled for multiple times, in solution again
Root can build up to higher concentration.
When using the oxidative degradation process Treatment of Cyanide-containing Wastewater such as alkaline chlorination process, the cyanide in waste water is oxidized to cyanic acid
Salt, then further oxidation generates CO2And nitrogen, to achieve the purpose that purify sewage.The process can use following equation table
Show:
ClO-+H2O+CN-→CNCl+2OH- (4)
CNCl+2OH-→CNO-+Cl-+H2O (5)
2CNO-+3ClO-+H2O→2CO2↑+N2↑+2OH-+3Cl- (6)
In actual production, to guarantee that the complete oxidation of cyanide is deviate from, the additive amount of oxidant is usually theory in production
1.5~2 times of amount, therefore cause the technique reagent consumption amount larger, processing cost is higher.Further, since thiocyanate radical is steady
It is qualitative to be much higher than cyanide, such as it is aoxidized, it is necessary to increase dosing, cause that the production cost increases；To limit
Application of the oxidation technology in thiocyanate wastewater treatment.
Summary of the invention
The technical problem to be solved by the invention is to provide thiocyanates in a kind of simple, efficiently, inexpensive cyanide wastewater
The flocculation sedimentation purification method of ion.
Technical scheme is as follows:
The flocculation sedimentation purification method of Thiocyanate ion in a kind of cyanide wastewater, it is characterised in that according to the following steps into
Row:
1) concentrated sulfuric acid, is added in cyanide wastewater and adjusts pH value to 2-3；
2), after acidifying solution filtering, excess soluble molysite is added into filtrate for free cyanogen to be removed in depth, is sufficiently stirred
After filter；
3) milk of lime, is added in filtrate and adjusts pH value to 5-9, stirring, is added bodied ferric sulfate or poly-ferric chloride is inhaled
Attached thiocyanate ion；
4) abandoned mine powder, is added and stirs further flocculating setting；
5) it is filtered after, settling.
Soluble ferric iron salt preferable amount is 1~2 times of free sodium cyanide gross mass in step 2).
In step 3) bodied ferric sulfate or poly-ferric chloride preferable amount be thiocyanate gross mass in waste water 0.65~
1.28 again.
The preferred control method that useless mineral powder amount is added in step 4) is: stirring flocculating setting to solution red disappears.
Soluble ferric iron salt is preferably ferric sulfate.
Liquid passes through aeration stripping, carrier gas regenerating sodium cyanide after lye adsorbs after step 1) acidification.
The present invention is dropped using bodied ferric sulfate absorption, flocculation, precipitating removal thiocyanate radical to purify Cyanide Leaching liquid
Influence of the low lean solution reuse to smelting process.
Bodied ferric sulfate is a kind of inorganic polymer flocculant haveing excellent performance, and molecular structure is huge, and adsorption capacity is strong,
It has been widely used in industrial waste water purifying process field.The present invention utilizes SCN?And Fe3+Stable complex can be formed, is led to
Chain macromolecule bodied ferric sulfate is crossed to adsorb it；It is free by the removal of the methods of acidification aeration and molysite complexing simultaneously
Cyanogen, to avoid CN?With SCN?Competitive Adsorption occurs on polyaluminum sulfate iron molecule, to reduce the dosage of bodied ferric sulfate and mention
The removal rate of high thiocyanate radical；Finally SCN has been adsorbed using the assistance of abandoned mine powder?Bodied ferric sulfate flocculating setting, realize precipitating
Remove the purpose of thiocyanate radical.
The present invention is by a large number of experiments to factors such as ferric sulfate dosage, pH value, bodied ferric sulfate and miberal powder dosages to sulphur cyanogen
Acid group removal effect has carried out detailed investigation, it is determined that best agentia condition；After the process, thiocyanic acid in waste water
Root removal rate can reach 70% or more.Present invention process is simple, reagent consumption is few, equipment investment is low is suitable for popularization and application.
Compared with the existing technology, the present invention omits acidification-regenerating sodium cyanide process, directly carries out deep removal free cyanogen
Processing.
Specific embodiment
Embodiment 1
The de- golden lean solution 2L of Cyanide Leaching is weighed, thiocyanate radical concentration is 4.23g/L in liquid, and the concentrated sulfuric acid is added and adjusts solution
PH value is 2.5 or so, aeration stripping 1h, carrier gas regenerating sodium cyanide after lye adsorbs.Liquid filters to take filtrate 1.5L after acidification,
Solid sulphuric acid iron 12g is added, is filtered after stirring 30min.Taking filtrate 1L that milk of lime is added to adjust pH value is 7.5 or so, adds 6g solid
Body bodied ferric sulfate, is added the abandoned mine powder 300g that -400 mesh account for 80% or more after being sufficiently stirred, stirring flocculating setting is red to solution
Decoloration completes treatment process after filtering.Thiocyanate radical concentration is 0.68g/L in tail washings after processing, and theoretical removal rate reaches
83.9%.
Embodiment 2
The de- golden lean solution 2L of Cyanide Leaching is weighed, thiocyanate radical concentration is 5.81g/L in liquid, and concentrated sulfuric acid adjustment solution is added
PH value is 2.2 or so, aeration stripping 1h, carrier gas regenerating sodium cyanide after lye adsorbs.Liquid filters to take filtrate 1.5L after acidification,
Solid sulphuric acid iron 15g is added, is filtered after stirring 30min.Taking filtrate 1L that milk of lime is added to adjust pH value is 8.3 or so, adds 8g solid
Body bodied ferric sulfate, is added the abandoned mine powder 400g that -400 mesh account for 80% or more after being sufficiently stirred, stirring flocculating setting is red to solution
Decoloration completes treatment process after filtering.Thiocyanate radical concentration is 0.77g/L in tail washings after processing, and theoretical removal rate reaches
86.7%.
Claims (7)
1. the flocculation sedimentation purification method of Thiocyanate ion in a kind of cyanide wastewater, it is characterised in that follow the steps below:
1) concentrated sulfuric acid, is added in cyanide wastewater and adjusts pH value to 2-3；
2), after acidifying solution filtering, excess soluble molysite is added into filtrate and is used to that free cyanogen to be removed in depth, mistake after being sufficiently stirred
Filter；
3) milk of lime, is added in filtrate and adjusts pH value to 5-9, stirring, is added bodied ferric sulfate or poly-ferric chloride adsorbs sulphur
Cyanic acid ion；
4) abandoned mine powder, is added and stirs further flocculating setting；
5) it is filtered after, settling.
2. the flocculation sedimentation purification method of Thiocyanate ion in cyanide wastewater according to claim 1, it is characterised in that: step
It is rapid 2) in soluble ferric iron salt dosage be 1 ~ 2 times of free sodium cyanide gross mass.
3. the flocculation sedimentation purification method of Thiocyanate ion in cyanide wastewater according to claim 1, it is characterised in that: step
It is rapid 3) in bodied ferric sulfate or poly-ferric chloride dosage be 0.65 ~ 1.28 times of thiocyanate gross mass in waste water.
4. the flocculation sedimentation purification method of Thiocyanate ion in cyanide wastewater according to claim 1, it is characterised in that step
The rapid control method that useless mineral powder amount 4) is added is: stirring flocculating setting to solution red disappears.
5. the flocculation sedimentation purification method of Thiocyanate ion in cyanide wastewater according to claim 1 or 2 or 3 or 4, special
Sign is: soluble ferric iron salt is ferric sulfate.
6. the flocculation sedimentation purification method of Thiocyanate ion in cyanide wastewater according to claim 1 or 2 or 3 or 4, special
Sign is: liquid passes through aeration stripping, carrier gas regenerating sodium cyanide after lye adsorbs after step 1) acidification.
7. the flocculation sedimentation purification method of Thiocyanate ion in cyanide wastewater according to claim 5, it is characterised in that: step
Liquid passes through aeration stripping, carrier gas regenerating sodium cyanide after lye adsorbs after rapid 1) acidification.
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| CN201811483901.5A CN109502811A (en) | 2018-12-06 | 2018-12-06 | The flocculation sedimentation purification method of Thiocyanate ion in a kind of cyanide wastewater |
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|---|---|---|---|
| CN201811483901.5A CN109502811A (en) | 2018-12-06 | 2018-12-06 | The flocculation sedimentation purification method of Thiocyanate ion in a kind of cyanide wastewater |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110104829A (en) * | 2019-05-16 | 2019-08-09 | 山东金创金银冶炼有限公司 | A kind of processing method of cyanide containing wastewater |
| CN110902878A (en) * | 2019-11-28 | 2020-03-24 | 德州众和环保装备制造有限公司 | Method for reducing hardness of wastewater |
| CN112028309A (en) * | 2020-08-22 | 2020-12-04 | 长春黄金研究院有限公司 | Method for resource recovery of high-concentration cyanide-containing wastewater and treatment of intermediate product |
| CN112125320A (en) * | 2019-06-25 | 2020-12-25 | 湖南能也科技发展有限公司 | Method for desalting water from barren liquor or barren liquor generated in gold extraction process by cyanidation |
| CN112337963A (en) * | 2020-11-05 | 2021-02-09 | 中国石油化工股份有限公司 | Method and device for removing soil cyanide |
| CN113041542A (en) * | 2021-02-10 | 2021-06-29 | 河南科技大学 | Method for removing cyanide in gold smelting red slag by washing method |
| CN114377646A (en) * | 2022-03-02 | 2022-04-22 | 新疆有色金属研究所 | Process for purifying sulfur ions in water by tailing modified adsorption-based method |
| CN116535058A (en) * | 2023-06-25 | 2023-08-04 | 浙江省城乡规划设计研究院 | Treatment method of cyanide in wastewater |
| CN121575216A (en) * | 2026-01-28 | 2026-02-27 | 山东黄金矿业科技有限公司选冶实验室分公司 | Methods for reducing the amount of flocculant in precious metal smelting solutions for gold smelting |
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| CN110902878A (en) * | 2019-11-28 | 2020-03-24 | 德州众和环保装备制造有限公司 | Method for reducing hardness of wastewater |
| CN112028309A (en) * | 2020-08-22 | 2020-12-04 | 长春黄金研究院有限公司 | Method for resource recovery of high-concentration cyanide-containing wastewater and treatment of intermediate product |
| CN112337963A (en) * | 2020-11-05 | 2021-02-09 | 中国石油化工股份有限公司 | Method and device for removing soil cyanide |
| CN113041542A (en) * | 2021-02-10 | 2021-06-29 | 河南科技大学 | Method for removing cyanide in gold smelting red slag by washing method |
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| CN114377646B (en) * | 2022-03-02 | 2024-01-09 | 新疆有色金属研究所 | Process for purifying sulfur ions in water using tailings modified adsorption-based method |
| CN116535058A (en) * | 2023-06-25 | 2023-08-04 | 浙江省城乡规划设计研究院 | Treatment method of cyanide in wastewater |
| CN121575216A (en) * | 2026-01-28 | 2026-02-27 | 山东黄金矿业科技有限公司选冶实验室分公司 | Methods for reducing the amount of flocculant in precious metal smelting solutions for gold smelting |
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