CN100488890C - Method for reclaiming valuable element from acidic arsenic-containing biological oxidation gold extraction waste liquor - Google Patents
Method for reclaiming valuable element from acidic arsenic-containing biological oxidation gold extraction waste liquor Download PDFInfo
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- CN100488890C CN100488890C CNB200710011170XA CN200710011170A CN100488890C CN 100488890 C CN100488890 C CN 100488890C CN B200710011170X A CNB200710011170X A CN B200710011170XA CN 200710011170 A CN200710011170 A CN 200710011170A CN 100488890 C CN100488890 C CN 100488890C
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- rocan
- biological oxidation
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 44
- 239000010931 gold Substances 0.000 title claims abstract description 44
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 43
- 230000003647 oxidation Effects 0.000 title claims abstract description 38
- 239000002699 waste material Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000002378 acidificating effect Effects 0.000 title claims abstract description 24
- 229910052785 arsenic Inorganic materials 0.000 title claims description 72
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims description 71
- 238000000605 extraction Methods 0.000 title claims description 31
- 239000007788 liquid Substances 0.000 claims abstract description 55
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 32
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims abstract description 18
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 239000007790 solid phase Substances 0.000 claims abstract description 10
- VETKVGYBAMGARK-UHFFFAOYSA-N arsanylidyneiron Chemical compound [As]#[Fe] VETKVGYBAMGARK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001556 precipitation Methods 0.000 claims description 29
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 13
- 239000012670 alkaline solution Substances 0.000 claims description 10
- 239000011734 sodium Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 5
- 229910052958 orpiment Inorganic materials 0.000 claims description 5
- 229910052957 realgar Inorganic materials 0.000 claims description 5
- 238000005987 sulfurization reaction Methods 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 2
- 239000004202 carbamide Substances 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 2
- 239000001117 sulphuric acid Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 9
- 239000000284 extract Substances 0.000 abstract description 8
- 238000001914 filtration Methods 0.000 abstract description 6
- 239000003513 alkali Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 229910020284 Na2SO4.10H2O Inorganic materials 0.000 abstract 2
- 238000000151 deposition Methods 0.000 abstract 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 2
- 229960005191 ferric oxide Drugs 0.000 abstract 2
- 235000013980 iron oxide Nutrition 0.000 abstract 2
- 230000007935 neutral effect Effects 0.000 abstract 2
- 238000005204 segregation Methods 0.000 abstract 2
- RSIJVJUOQBWMIM-UHFFFAOYSA-L sodium sulfate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=O RSIJVJUOQBWMIM-UHFFFAOYSA-L 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 12
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 9
- 235000011941 Tilia x europaea Nutrition 0.000 description 9
- 239000004571 lime Substances 0.000 description 9
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 235000010265 sodium sulphite Nutrition 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000010949 copper Substances 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 230000003203 everyday effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 150000002505 iron Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical compound [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000001093 anti-cancer Effects 0.000 description 1
- 229940000489 arsenate Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a reclaiming method of valency element from acidic rocan biological oxidation extract gold waste liquid, which comprises the following steps: adding acidic rocan biological oxiThe invention discloses a reclaiming method of valency element from acidic rocan biological oxidation extract gold waste liquid, which comprises the following steps: adding acidic rocan biological oxidation extract gold waste liquid and precipitant into autoclave at the same time; depositing selectively; realizing arsenic iron separation; adopting filtering technology; realizing solid and liquid sdation extract gold waste liquid and precipitant into autoclave at the same time; depositing selectively; realizing arsenic iron separation; adopting filtering technology; realizing solid and liquid separation; leading solid phase into iron-oxide red preparing process; leading liquid into process of reclaiming rocan; adjusting the solution to neutral with solid-liquid; condensing at 0-4 deg.c; cryeparation; leading solid phase into iron-oxide red preparing process; leading liquid into process of reclaiming rocan; adjusting the solution to neutral with solid-liquid; condensing at 0-4 deg.c; crystallizing to Na2SO4.10H2O; returning the tail liquid to the first process; using to formulating queous alkali. The good effect of this invention can realize effective segregation of rocan and iron ofstallizing to Na2SO4.10H2O; returning the tail liquid to the first process; using to formulating queous alkali. The good effect of this invention can realize effective segregation of rocan and iron of acidic rocan biological oxidation extract gold waste liquid. acidic rocan biological oxidation extract gold waste liquid.
Description
Technical field
The present invention relates to from acidic arsenic-containing biological oxidation gold extraction waste liquor, extract a kind of technology of valuable element.
Background technology
How tame the at present domestic factory that has built up employing biological oxidation gold extraction technology has, and becomes and has maximum country of biological oxidation gold extraction factory in the world.
But, producing a large amount of arsenic-containing acid biological oxidation gold extraction waste liquors in the biological oxidation gold extraction technology, this class biological oxidation solution pH value 0.6～1.8 is according to the mineral composition and the oxidizing condition difference of the raw mineral materials of handling, every m
3Oxidation liquid can contain oligo-elementss such as arsenic about (25-45) kg iron and 8kg and copper, zinc, lead.The compound of arsenic is a kind of protoplasma poisonous substance, has biological effect widely, is defined as first kind carcinogens by world anti-cancer research institution.
Handle at present acidic arsenic-containing biological oxidation gold extraction waste liquor comparatively successful method be " lime iron salt method ", promptly Fe/As greater than 3 condition under, carry out neutralizing treatment with lime, make the more stable FeAsO of As generation
4Precipitation is removed from solution.But carry gold at biological oxidation solution and also have Fe in useless
2+, cause the arsenic of " in and slag " lining can not be fully with FeAsO
4Exist, but part is with Ca (AsO
3)
2Form exist.The arsenical salt of this class is with the variation of edaphic condition, the effect of bacterium in addition, and solubleness increases, and can cause tangible secondary pollution.Main is to adopt " lime molysite neutralization precipitation method " when carrying out harmless treatment, need to consume a large amount of lime, handle 1 ton of gold ore and consume lime 300～400Kg, if day 100 tons of gold ore of processing, the biological oxidation gold extraction waste liquor that produces is with " lime iron salt method " when carrying out harmless treatment, then need 30～40 tons in daily consumption lime, and in about the generation hundredweight and slag, so annual then produce about 40,000 tons in and slag, the quantity of slag is so big, outward transport will expend a large amount of manpowers, financial resources, increases the gold production cost.In addition, these contain in the arsenic and slag is put in the mine tailing storehouse, also are the potential source of pollution.Simultaneously, valuable elements such as the arsenic in the acidic arsenic-containing biological oxidation gold extraction waste liquor, iron, sulphur are thrown away again in vain.Day is handled the day acid discharge biological oxidation gold extraction waste liquor 500-600m of biological oxidation gold extraction factory of 100 tons of gold ore
3, throw away nearly 1400～1700 tons of arsenic and 4000-8000 tons of iron every year in vain, cause the very big wasting of resources.These valuable elements to be reclaimed, make high value-added product, can produce considerable economic.
Summary of the invention
Weak point at existing acid biological oxidation gold extraction waste liquor treatment technology, the invention provides a kind of is support with the chemical method, be aided with outer field action, from acidic arsenic-containing biological oxidation gold extraction waste liquor, reclaim the method for valuable element, present method can make acidic arsenic-containing biological oxidation gold extraction waste liquor reach innoxious, and realize comprehensive utilization of resources and gold Production Flow Chart zero release reducing the gold production cost, increase economic efficiency.
The present invention is for solving acid biological oxidation gold extraction waste liquor treatment technology problem, the technical scheme that is adopted is: acidic arsenic-containing biological oxidation gold extraction waste liquor is as process object, contain elements such as Fe, As, Zn, Cu, Pb, S in this waste liquid, its content is respectively 25～45gL
-1Fe, 2～9gL
-1As, 0.1～0.3gL
-1Zn, 0.01～0.07gL
-1Cu, 0.02～0.03gL
-1Pb, 12～30gL
-1S, wherein sulphur and arsenic exist with the form of sulfate radical and arsenate respectively, and the iron majority is with Fe
3+Form exists, biological oxidation gold extraction waste liquor pH value 0.6～1.8.
In view of above-mentioned condition, the technological process of extracting valuable element is:
1, add acidic arsenic-containing biological oxidation gold extraction waste liquor and precipitation agent simultaneously in reactor, this precipitation agent can be 6～10molL
-1Alkaline solution can be a urea also, in reactor system pH be 9～14, temperature of reaction be 10～60 ℃, stirring intensity be under the condition of 600～800r/min by selective precipitation, realize that arsenic iron separates;
If adopting NaOH is precipitation agent, principal reaction is Fe
3++ 3 (OH
-1)=Fe (OH)
3↓
2, after technology such as employing filtration or centrifugation realized solid-liquid separation, solid phase entered the iron oxide red preparation section, and liquid enters the operation that reclaims arsenic;
3, iron precipitate roasting 1～2 hour (500～900 ℃ of temperature ranges) in air atmosphere after washing obtains iron oxide red;
4, in the heavy arsenic reactor of sulfuration, add simultaneously through after the solid-liquid separation contain arsenic liquid, concentration is 1～2molL
-1Sodium sulfide solution and concentration are 3～4molL
-1Sulphuric acid soln is 0.5～3 in the pH value, stirring intensity is that 300～500r/min, magneticstrength are 0.2～0.5T or do not add under the condition in magnetic field, reclaims arsenic by the sulfide precipitation reaction, and primary products can be realgar or orpiment; Further can pass through wet reducing prepared in reaction elemental arsenic;
5, the solution behind the recovery arsenic is with 4molL
-1NaOH solution transfer to neutrality, 0～4 ℃ of condensation-crystallization goes out Na
2SO
410H
2O;
6, reclaim Na
2SO
4After tail washings return the 1st step operation, in order to the preparation alkaline solution, realize the whole process zero release.
The invention has the beneficial effects as follows:
1, the arsenic, iron of realizing acidic arsenic-containing biological oxidation gold extraction waste liquor effectively separation and arsenic, iron, sulphur content do not recycle, the rate of recovery of arsenic, iron, sulphur is equal more than 96%;
2, whole process zero release, non-secondary pollution;
3, acidic arsenic-containing biological oxidation gold extraction waste liquor is realized innoxious, recycling comprehensive treatment, makes the technology of " biological oxidation gold extraction technology " more perfect.Avoid in the former technology " lime iron salt method " to handle that acidic arsenic-containing biological oxidation gold extraction waste liquor lime consumption amount is big, the quantity of slag big, potential pollution source is arranged, throw away valuable element in vain causes shortcomings such as the wasting of resources.
Description of drawings
Fig. 1 is the process flow sheet that extracts valuable element from acidic arsenic-containing biological oxidation gold extraction waste liquor;
Embodiment
Example 1
1, to handle 250m every day
3Biological oxidation gold extraction waste liquor (principal element Fe content is 24g/L, and As content is 5g/L) is an example, and the recovery technological process of its valuable element is: alkali is medicament, preparation 8molL
-1Alkaline solution as precipitation agent, in reactor, add simultaneously acidic arsenic-containing biological oxidation gold extraction waste liquor and precipitation agent, adjusting the bio-oxidation flow velocity is 10.5m
3/ h, the precipitation agent flow velocity is about 5.6m
3/ h, and be as the criterion with pH=12.5 in the control reactor, adjust the precipitation agent flow velocity at any time, 10 ℃ of temperature of reaction, stirring intensity 500rpm/min carries out arsenic iron to be separated;
2, adopt filtration or centrifugal separation technique, carry out solid-liquid separation, solid phase enters the iron oxide red preparation section, contains arsenic liquid and enters recovery arsenic operation;
3, the solid phase precipitation thing is after washing oven dry, roasting 1 hour in the air atmosphere under 500 ℃ of temperature condition, iron oxide red;
4, gained contains arsenic liquid and enters the arsenic recovery process, will contain arsenic liquid, 3molL
-1The sulfuric acid of concentration, 1molL
-1Three kinds of liquid of the sodium sulphite of concentration join in the heavy arsenic reactor of sulfuration simultaneously, and containing arsenic liquid bare flow is 15m
3/ h, contain arsenic liquid: the vitriol oil: the sodium sulphite velocity ratio is controlled to be 10:1:1, suitably adjust the flow velocity of sulfuric acid liquid, pH=0.5～1 of control in the reaction system, stirring intensity 300r/min, magneticstrength 0.2T or do not add magnetic field, carry out sulfide precipitation, the liquid that flows out from reactor passes through solid-liquid separation, and arsenic reclaims with sulfide, and obtain primary products this moment is realgar or orpiment;
5, the solution behind the recovery arsenic adds 4molL
-1The NaOH solution of concentration transfers to neutrality, and 0 ℃ of condensation-crystallization 2h gets Na
2SO
410H
2O again through heating, gets anhydrous sodium sulphate;
6, reclaim Na
2SO
4After tail washings, return the 1st step operation, in order to the preparation alkaline solution, realize the whole process zero release.
Example 2
1, to handle 500m every day
3Biological oxidation gold extraction waste liquor (principal element Fe content is 36g/L, and As content is 7.5g/L) is an example, and the recovery technological process of its valuable element is: alkali is medicament, preparation 10molL
-1Alkaline solution as precipitation agent, in reactor, add simultaneously acidic arsenic-containing biological oxidation gold extraction waste liquor and precipitation agent, adjusting the bio-oxidation flow velocity is 21m
3/ h, the precipitation agent flow velocity is about 11m
3/ h, and be as the criterion with pH=13.5 in the control reactor, adjust the precipitation agent flow velocity at any time, 40 ℃ of temperature of reaction, stirring intensity 700rpm/min carries out arsenic iron to be separated;
2, adopt filtration or centrifugal separation technique, carry out solid-liquid separation, solid phase enters the iron oxide red preparation section, contains arsenic liquid and enters recovery arsenic operation;
3, the solid phase precipitation thing is after washing oven dry, roasting 1 hour in the air atmosphere under 700 ℃ of temperature condition, iron oxide red;
4, gained contains arsenic liquid and enters the arsenic recovery process, will contain arsenic liquid, 3.5molL
-1The sulfuric acid of concentration, 1.5molL
-1Three kinds of liquid of the sodium sulphite of concentration join in the heavy arsenic reactor of sulfuration simultaneously, and containing arsenic liquid bare flow is 25m
3/ h, contain arsenic liquid: the vitriol oil: the sodium sulphite velocity ratio is controlled to be 10:1:1.1, suitably adjust the flow velocity of sulfuric acid liquid, pH=1～2 of control in the reaction system, stirring intensity 400r/min, magneticstrength 0.3T or do not add magnetic field, carry out sulfide precipitation, the liquid that flows out from reactor passes through solid-liquid separation, and arsenic reclaims with sulfide, and obtain primary products this moment is realgar or orpiment;
5, the solution behind the recovery arsenic adds 4molL
-1The NaOH solution of concentration transfers to neutrality, and 2 ℃ of condensation-crystallization 2h get Na
2SO
410H
2O again through heating, gets anhydrous sodium sulphate;
6, reclaim Na
2SO
4After tail washings, return the 1st step operation, in order to the preparation alkaline solution, realize the whole process zero release.
Example 3
To handle 500m every day
3Bio-oxidation waste liquid (principal element Fe content is 45g/L, and As content is 8.5g/L) is an example.The recovery technological process of its valuable element is: alkali is medicament, preparation 10molL
-1Alkaline solution as precipitation agent.Add acidic arsenic-containing biological oxidation gold extraction waste liquor and precipitation agent simultaneously in reactor, adjusting the bio-oxidation flow velocity is 21m
3/ h, the precipitation agent flow velocity is about 12m
3/ h, and be as the criterion with pH=13.5 in the control reactor, adjust the precipitation agent flow velocity at any time, 60 ℃ of temperature of reaction, stirring intensity 800rpm/min carries out arsenic iron and separates;
2, adopt filtration or centrifugal separation technique, carry out solid-liquid separation, solid phase enters the iron oxide red preparation section, contains arsenic liquid and enters recovery arsenic operation;
3, the solid phase precipitation thing is after washing oven dry, roasting 2 hours in the air atmosphere under 900 ℃ of temperature condition, iron oxide red;
4, gained contains arsenic liquid and enters the arsenic recovery process, will contain arsenic liquid, 4molL
-1The sulfuric acid of concentration, 2molL
-1Three kinds of liquid of the sodium sulphite of concentration join in the heavy arsenic reactor of sulfuration simultaneously, and containing arsenic liquid bare flow is 31m
3/ h contains arsenic liquid: the vitriol oil: the sodium sulphite velocity ratio is controlled to be 10:1:1.2, suitably adjusts the flow velocity of sulfuric acid liquid, pH=2～3 of control in the reaction system, and stirring intensity 500r/min, magneticstrength 0.5T or do not add magnetic field carries out sulfide precipitation.The liquid that flows out from reactor passes through solid-liquid separation, and arsenic reclaims with sulfide, and obtain primary products this moment is realgar or orpiment;
5, the solution behind the recovery arsenic adds 4molL
-1The NaOH solution of concentration transfers to neutrality, and 4 ℃ of condensation-crystallization 2h get Na
2SO
410H
2O again through heating, gets anhydrous sodium sulphate;
6, reclaim Na
2SO
4After tail washings, return the 1st step operation, in order to the preparation alkaline solution, realize the whole process zero release.
Claims (1)
1, a kind of method that reclaims valuable element from acidic arsenic-containing biological oxidation gold extraction waste liquor is characterized in that may further comprise the steps:
1) add acidic arsenic-containing biological oxidation gold extraction waste liquor and precipitation agent, simultaneously in reactor, this precipitation agent is 6～10molL
-1Alkaline solution or urea, system pH is 9～14 in the control reactor, temperature of reaction is 10～60 ℃, at stirring intensity be under the condition of 600～800r/min by selective precipitation, realize that arsenic iron separates;
2), adopt to filter or centrifugal separation technique is realized solid-liquid separation, separate the back solid phase and enter the iron oxide red preparation section, liquid enters the operation that reclaims arsenic;
3), iron precipitate roasting 1～2 hour in air atmosphere after washing, maturing temperature is 500～900 ℃, obtains iron oxide red;
4), in the heavy arsenic reactor of sulfuration, add simultaneously through after the solid-liquid separation contain arsenic liquid, concentration is 1～2molL
-1Sodium sulfide solution and concentration are 3～4molL
-1Sulphuric acid soln is 0.5～3 in the pH value, stirring intensity is that 300～500r/min, magneticstrength are 0.2～0.5T or do not add under the condition in magnetic field, reclaims arsenic by the sulfide precipitation reaction, and primary products are realgar or orpiment; In order to further passing through wet reducing prepared in reaction elemental arsenic;
5), the solution behind the recovery arsenic is with 4molL
-1NaOH solution transfer to neutrality, 0～4 ℃ of condensation-crystallization goes out Na
2SO
410H
2O;
6), reclaim Na
2SO
4After tail washings return the 1st step operation, in order to the preparation alkaline solution, realize the whole process zero release.
Priority Applications (1)
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|---|---|---|---|
| CNB200710011170XA CN100488890C (en) | 2007-04-29 | 2007-04-29 | Method for reclaiming valuable element from acidic arsenic-containing biological oxidation gold extraction waste liquor |
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|---|---|---|---|
| CNB200710011170XA CN100488890C (en) | 2007-04-29 | 2007-04-29 | Method for reclaiming valuable element from acidic arsenic-containing biological oxidation gold extraction waste liquor |
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| CN101168450B (en) * | 2007-09-27 | 2010-09-01 | 中国黄金集团公司技术中心 | Method for separating and reclaiming arsenic and iron from acidic waste liquid containing arsenic acid and ferric sulfate |
| CN101586185B (en) * | 2009-01-14 | 2010-10-20 | 长春黄金研究院 | Method for separating and recycling arsenic and iron from biological oxidation solution of sulfide ore |
| CN101660055B (en) * | 2009-07-15 | 2011-06-22 | 中国科学院青海盐湖研究所 | Method for recovering toxic arsenic compounds during metal indium extraction |
| CN102247967B (en) * | 2010-05-18 | 2014-10-08 | 上海复拓环境技术有限公司 | Harmless treatment process for arsenic-containing waste dangerous chemicals |
| PE20211336A1 (en) | 2014-01-31 | 2021-07-26 | Goldcorp Inc | PROCESS FOR THE SEPARATION AND RECOVERY OF METAL SULFIDES FROM A MIXED SULFIDE MINE OR CONCENTRATE |
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| CN107697889A (en) * | 2017-09-29 | 2018-02-16 | 上海电力学院 | A kind of method that sulphur and arsenic are reclaimed in the bridge without platform slag from wet method |
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| CN110550786B (en) * | 2019-10-18 | 2021-10-26 | 广西森合高新科技股份有限公司 | Waste liquid treatment process |
| CN110551901B (en) * | 2019-10-18 | 2021-05-18 | 广西森合高新科技股份有限公司 | Method for recovering copper and lead from tail liquid and treatment method of leaching tail liquid generated by gold concentrate gold extraction process |
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| CN101041498A (en) | 2007-09-26 |
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