CN102002600B - Environmentally-friendly chlorine water gold-extracting process - Google Patents
Environmentally-friendly chlorine water gold-extracting process Download PDFInfo
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- CN102002600B CN102002600B CN2010105627995A CN201010562799A CN102002600B CN 102002600 B CN102002600 B CN 102002600B CN 2010105627995 A CN2010105627995 A CN 2010105627995A CN 201010562799 A CN201010562799 A CN 201010562799A CN 102002600 B CN102002600 B CN 102002600B
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- waste
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- 239000000460 chlorine Substances 0.000 title claims abstract description 53
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910052801 chlorine Inorganic materials 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title abstract description 18
- 239000010931 gold Substances 0.000 claims abstract description 53
- 229910052737 gold Inorganic materials 0.000 claims abstract description 52
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000002386 leaching Methods 0.000 claims abstract description 49
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 41
- 239000002699 waste material Substances 0.000 claims abstract description 27
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 20
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010521 absorption reaction Methods 0.000 claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000605 extraction Methods 0.000 claims abstract description 12
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims abstract description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 9
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 9
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 9
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 9
- 239000002912 waste gas Substances 0.000 claims abstract description 8
- 238000001556 precipitation Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 230000002829 reductive effect Effects 0.000 claims description 11
- 239000004411 aluminium Substances 0.000 claims description 10
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 239000000796 flavoring agent Substances 0.000 claims description 6
- 235000019634 flavors Nutrition 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 5
- 230000000382 dechlorinating effect Effects 0.000 claims description 5
- 238000006298 dechlorination reaction Methods 0.000 claims description 5
- 239000000920 calcium hydroxide Substances 0.000 claims description 4
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 3
- RBFQJDQYXXHULB-UHFFFAOYSA-N arsane Chemical compound [AsH3] RBFQJDQYXXHULB-UHFFFAOYSA-N 0.000 abstract description 3
- 239000007844 bleaching agent Substances 0.000 abstract description 3
- 239000001110 calcium chloride Substances 0.000 abstract description 3
- 229910001628 calcium chloride Inorganic materials 0.000 abstract description 3
- 229910000510 noble metal Inorganic materials 0.000 abstract description 3
- 239000003440 toxic substance Substances 0.000 abstract description 3
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract description 2
- 238000003828 vacuum filtration Methods 0.000 abstract description 2
- 231100000614 poison Toxicity 0.000 abstract 2
- 239000005708 Sodium hypochlorite Substances 0.000 abstract 1
- 229910052785 arsenic Inorganic materials 0.000 abstract 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 abstract 1
- 229910000070 arsenic hydride Inorganic materials 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 238000005272 metallurgy Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000036632 reaction speed Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 231100000331 toxic Toxicity 0.000 description 6
- 230000002588 toxic effect Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 101100372509 Mus musculus Vat1 gene Proteins 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 229910000497 Amalgam Inorganic materials 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000003734 kidney Anatomy 0.000 description 2
- 210000002345 respiratory system Anatomy 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 208000024891 symptom Diseases 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 208000009304 Acute Kidney Injury Diseases 0.000 description 1
- 206010001488 Aggression Diseases 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 206010037423 Pulmonary oedema Diseases 0.000 description 1
- 208000033626 Renal failure acute Diseases 0.000 description 1
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 201000011040 acute kidney failure Diseases 0.000 description 1
- 208000012998 acute renal failure Diseases 0.000 description 1
- 244000245420 ail Species 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- HEZMRBNCRSVIHU-UHFFFAOYSA-N calcium boric acid dihypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-].OB(O)O HEZMRBNCRSVIHU-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 230000002498 deadly effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000004611 garlic Nutrition 0.000 description 1
- 210000002216 heart Anatomy 0.000 description 1
- 230000002949 hemolytic effect Effects 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000004091 panning Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 208000005333 pulmonary edema Diseases 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Removal Of Specific Substances (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the field of wet metallurgy, and discloses an environmentally-friendly chlorine water gold-extracting process for leaching gold from chlorine water for gold-containing waste or waste residue and removing toxic substances produced in the gold-extracting process to purify air so as to fulfill the purpose of environmentally-friendly gold extraction. The process comprises thefollowing steps of: putting the gold-containing waste or waste residue into a leaching tank, quantitatively adding a leaching agent such as sodium hypochlorite or bleaching powder, quantitatively adding sulfuric acid, hydrochloric acid and industrial salt or calcium chloride, reacting the mixture for 1 hour with stirring, separating leaching liquor by vacuum filtration, and performing gold separation and precipitation on the leaching liquor by using a reducing agent such as zinc powder, aluminum powder or ferrous sulfate; and removing chlorine from the waste gas discharged from the leaching tank, a vacuum filter and a reduction tank through an alkali liquor absorption tower, and then delivering the waste gas to an adsorber filled with an arsenic removal catalyst to remove AsH3 so as to realize standard emission. The process has the characteristics that: the process for extracting noble metals from the waste or the waste residue has cheap and easily-obtained raw materials, high gold-extracting efficiency and remarkable economic benefit; the reaction speed is high, the devices are small, and the discharged chlorine is recycled for reuse so as to save the leaching agent and reduce the cost; and the system is closed for treating the toxic substances, so the operating environment is good, and the environmentally-friendly gold-extracting process is realized and has prospect.
Description
Technical field
The invention belongs to the hydrometallurgy field, refuse or the waste residue that will contain gold leach gold with chlorine water, will carry the Toxic that produces in the golden process simultaneously and remove, and purify air, and put forward the purpose of gold to reach environment-friendly type.
Background technology
Gold is rare precious metal, and chemical property is extremely stable, and many centuries are monetization usefulness always.The size of a national economic strength, at present still in the national treasury commonly used the gold stockage how much weigh, visible gold output is how important for a country.Though China's gold ore resource is abundant but limited, can reclaim various refuse or the slags that contain a deposit, enlarging golden resource is a good thing, so-called real panning.
At present, the gold mine raw material is carried gold and is mainly contained amalgam process and cyanide process,, carries gold for refuse or waste residue and carries gold with chemical method mostly with thiocarbamide method or chemical method for the gold mine raw material that is difficult to direct cyaniding.Liquid chlorine Fa Tijin is replaced by extraction of gold by cyanidation technology to produce chlorine as the gold in the leaching agent leaching gold mine in the aqueous solution, definitely to say after the chlorine water method that should be, this method are carried gold.The used leaching agent of amalgam process and cyanide process is mercury and sodium cyanide, all is violents in toxicity, we can say that price of gold is valuable to be brought by life, over nearly 20 years, because the needs of environmental protection aspect, the liquid chlorine gold extraction technology has caused the attention of each side again, might become one of gold extracting method again from now on.
It is nontoxic that the liquid chlorine method is carried the used raw material of gold, owing to often contain arsenide in the waste residue, and as just containing As in the sulfurous iron ore calcining
2O
3, when waste residue adds acid, will produce AsH
3Gas is emitted, and AsH is also arranged when adding reductive agent such as aluminium powder or zinc powder in leach liquor
3Emit.AsH
3For colourless garlic flavour gas arranged slightly.Hydrogen arsenide is severe toxicity, is strong hemolytic toxicant.Hydrogen arsenide is distributed to each internal organs of whole body with circulation of blood after respiratory tract sucks.Especially cause the acute kidney infringement, cause acute renal failure.Arsenide still has direct toxic action to the heart, liver, kidney in addition.
Have the unreacted chlorine of part to emit in the chlorine water, chlorine is a kind of toxic gas, and it mainly invades human body by respiratory tract, causes expiratory dyspnea, so the manifest symptom of chlorine poisoning is that violent cough takes place.During severe symptoms, pulmonary edema can take place, make the Circulation difficulty and deadly dying.
Summary of the invention
The removal chlorine water that the objective of the invention is to adopt an effective measure is carried Toxic chlorine and the AsH that produces in the golden process
3, chlorine returns use, forms an environment-friendly type chlorine water gold extraction technology.
Another object of the present invention is that refuse or the waste residue that will contain gold leach gold with chlorine water, will carry the Toxic that produces in the golden process simultaneously and remove, and purifies air, and puies forward the purpose of gold to reach environment-friendly type.
Environment-friendly type chlorine water gold extraction technology of the present invention is that refuse or waste residue are put into leaching vat (1), quantitatively add leaching agent (9), stirring reaction 1 hour, utilize vacuum filter (2) to isolate leach liquor, put into leaching vat (3), add reductive agent (10), analyse the gold precipitation, from leaching vat, the waste gas of discharging in vacuum filter and the reducing bath is earlier by chlorine absorption tower (4), and dechlorinating agent adds in the circulation groove (5), sending into chlorine absorption tower internal recycle with recycle pump (6) absorbs, gas after dechlorination is extracted out with vacuum fan (7), makes total system be in negative pressure state, and obnoxious flavour can not leak, the gas of extracting out enters in the adsorber (8) that dearsenic agent is housed, and removes AsH
3, realize environment protection emission.
Described leaching agent is clorox, chlorinated lime, sulfuric acid, hydrochloric acid, and concentration is 8～12%, chlorine content is more than 5 grams per liters in the control chlorine water.
Described reductive agent is aluminium powder, zinc powder or ferrous sulfate, add-on according to Gold Content in the waste liquid less than controlling below 10 mg/litre.
Described dechlorinating agent recycles with 10% NaOH or milk of lime, returns leaching vat after saturated to use as leaching agent.
Described dearsenic agent is the gac that is impregnated with metallic elements such as copper, aluminium, manganese, chromium, calcium, and handle with landfill method saturated back.
Principle of work of the present invention:
1, in refuse or waste residue, adds chlorinated lime or clorox, add sulfuric acid again and generate chlorine, in order to improve chlorine ion concentration and the acidity in the chlorine water, improve the dissolution rate of gold, add hydrochloric acid and calcium chloride or sodium-chlor in solution, its reaction is as follows: be example with the chlorinated lime.
CaOCl
2+H
2SO
4＝CaSO
4+Cl
2+H
2O
2Au+3Cl+2HCl＝2HAuCl
4
2, the solution behind the extract elimination waste residue is separated out gold with reductive agent aluminium, zinc, ferrous sulfate etc. with its reduction, is example with zinc and ferrous sulfate, reacts as follows:
2HAuCl
4+3Zn＝2Au↓+3ZnCl
2+2HCl
HAuCl
4+3FeSO
4＝Au↓+Fe
2(SO
4)
3+FeCl
3+HCl
3, unreacted chlorine absorbs with alkali or milk of lime in washing tower, generates clorox or calcium hypochlorite solution, returns use as leaching agent, reacts as follows:
NaOH+Cl
2＝NaClO+HCl
Ca(OH)
2+Cl
2＝CaOCl
2+H
2O
4, the AsH of Chan Shenging
3With dearsenic catalyst absorption, gas qualified discharge, react as follows:
2AsH
3+3MO＝3M+2As+3H
2O
Catalyzer is handled with landfill method.
Characteristics of the present invention are to extract noble metal from refuse or waste residue, and raw material is cheap and easy to get, carry golden efficient height, remarkable in economical benefits; Speed of response is fast, and equipment is little, and the chlorine of emitting reclaims, and returns use, saves leaching agent, reduces cost; System is airtight to carry out, and Toxic is handled, and good operational environment realizes the environment-friendly type gold extraction technology, is a kind of promising gold extraction technology.
The advantage that the present invention has and effect:
(1) extract noble metal from refuse or waste residue, raw material is cheap and easy to get, carries golden efficient height, remarkable in economical benefits.
(2) speed of response is fast, and equipment is little, and the chlorine of emitting reclaims, and returns use, saves leaching agent, reduces cost.
(3) system is airtight carries out, and Toxic is handled, and operating environment is improved, and realizes the environment-friendly type gold extraction technology.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the process flow sheet of the specific embodiment of the invention.
Fig. 2 is that environment-friendly type chlorine water of the present invention is put forward golden FB(flow block).
Among the figure: the 1-leaching vat; The 2-vacuum filter; The 3-reducing bath; The 4-chlorine gas absorption tower; The 5-circulation groove; The 6-recycle pump; The 7-vacuum fan; 8-AsH
3Adsorber; The 9-leaching agent; The 10-reductive agent.
Embodiment
Embodiment 1: see Fig. 1. and the flow process of gold is put forward in the zinc powder reduction of clorox chlorine water
The present invention puies forward golden principle according to the environment-friendly type chlorine water, refuse or waste residue are put into leaching vat, quantitatively add leaching agent such as clorox or chlorinated lime, quantitatively add sulfuric acid, hydrochloric acid and Industrial Salt or calcium chloride, stirring reaction 1 hour, utilize isolated by vacuum filtration to go out leach liquor, leach liquor is analysed the gold precipitation with reductive agent such as zinc powder, aluminium powder or ferrous sulfate.The waste gas of discharging from leaching vat, vacuum filter and reducing bath by the alkali lye absorption tower, is removed chlorine earlier, enters then in the adsorber that dearsenic catalyst is housed, and removes AsH
3, realize qualified discharge.By leaching vat, vacuum filter, reducing bath, chlorine absorption tower and AsH
3Equipment such as adsorber are realized.
The present invention realizes by following processing method:
1, leaching agent is clorox, chlorinated lime, sulfuric acid, hydrochloric acid, and concentration is 8～12%, chlorine content is more than 5 grams per liters in the control chlorine water.
2, reductive agent is aluminium powder, zinc powder, ferrous sulfate, add-on according to Gold Content in the waste liquid less than controlling below 10 mg/litre.
3, dechlorinating agent recycles with 10% NaOH or milk of lime, returns leaching vat after saturated to use as saturator.
4, dearsenic agent is the gac that is impregnated with metallic elements such as copper, aluminium, manganese, chromium, calcium, and handle with landfill method saturated back.
The sanitary index that the present invention reaches: cl content is less than 1mg/m in the room air
3, AsH
3Content is less than 0.3mg/m
3
The present invention puts into leaching vat 1 with refuse or waste residue, quantitatively add leaching agent 9 and be 10% clorox and 10% sulfuric acid, 10% hydrochloric acid and NaCl, stirring reaction 1 hour, utilize vacuum filter 2 to isolate leach liquor, put into leaching vat 3, add reductive agent 10 zinc powders, analyse the gold precipitation, gold content is below 10mg/L in the control waste liquid.The waste gas of discharging from leaching vat, vacuum filter and reducing bath is earlier by chlorine absorption tower 4,10% NaOH solution adds in the circulation groove 5, sending into chlorine absorption tower internal recycle with recycle pump 6 absorbs, satisfied chlorine bleach liquor turns back in the leaching vat, gas after dechlorination is extracted out with vacuum fan 7, makes total system be in negative pressure state, and obnoxious flavour can not leak, the gas of extracting out enters in the adsorber 8 that dearsenic catalyst is housed, and removes AsH
3, realize environment protection emission.
Embodiment 2: see Fig. 1. and chlorinated lime chlorine water aluminum reduction is put forward the flow process of gold
Refuse or waste residue are put into leaching vat 1, quantitatively add leaching agent 9 and be 10% chlorinated lime and 10% sulfuric acid, 10% hydrochloric acid and CaCl
2, stirring reaction 1 hour utilizes vacuum filter 2 to isolate leach liquor, puts into leaching vat 3, adds reductive agent 10 aluminium powders, analyses the gold precipitation, and gold content is below 10mg/L in the control waste liquid.
The waste gas of discharging from leaching vat, vacuum filter and reducing bath is by the Ca (OH) on chlorine absorption tower 4,10%
2Emulsion adds in the circulation groove 5, sending into chlorine absorption tower internal recycle with recycle pump 6 absorbs, satisfied Eusol turns back in the leaching vat, gas after dechlorination is extracted out with vacuum fan 7, make total system be in negative pressure state, obnoxious flavour can not leak, and the gas of extraction enters in the adsorber 8 that dearsenic catalyst is housed, and removes AsH
3, realize environment protection emission.
Embodiment 3: see Fig. 1. and the flow process of gold is put forward in the reduction of clorox chlorine water ferrous sulfate
Refuse or waste residue are put into leaching vat 1, quantitatively add leaching agent 9 and be 10% clorox and 10% sulfuric acid, 10% hydrochloric acid and NaCl, stirring reaction 1 hour, utilize vacuum filter 2 to isolate leach liquor, put into leaching vat 3, add reductive agent 10 ferrous sulfate, analyse the gold precipitation, gold content is below 10mg/L in the control waste liquid.
The waste gas of discharging from leaching vat, vacuum filter and reducing bath is earlier by chlorine absorption tower 4,10% NaOH solution adds in the circulation groove 5, sending into chlorine absorption tower internal recycle with recycle pump 6 absorbs, satisfied chlorine bleach liquor turns back in the leaching vat, gas after dechlorination is extracted out with vacuum fan 7, makes total system be in negative pressure state, and obnoxious flavour can not leak, the gas of extracting out enters in the adsorber 8 that dearsenic catalyst is housed, and removes AsH
3, realize environment protection emission.
Claims (1)
1. environment-friendly type chlorine water gold extraction technology, it is characterized in that: refuse or waste residue are put into leaching vat (1), quantitatively add leaching agent (9), stirring reaction 1 hour, utilize vacuum filter (2) to isolate leach liquor, put into reducing bath (3), add reductive agent (10), analyse the gold precipitation, from leaching vat, the waste gas of discharging in vacuum filter (2) and the reducing bath is earlier by chlorine absorption tower (4), dechlorinating agent adds in the circulation groove (5), sends into chlorine absorption tower internal recycle with recycle pump (6) and absorbs, and the gas after dechlorination is extracted out with vacuum fan (7), make total system be in negative pressure state, obnoxious flavour can not leak, and the gas of extraction enters in the adsorber (8) that dearsenic agent is housed, and removes AsH
3, realize environment protection emission;
Described leaching agent is clorox, chlorinated lime, sulfuric acid, hydrochloric acid, and concentration is 8～12%, and chlorine content is more than 5 grams per liters in the control chlorine water;
Described reductive agent is aluminium powder, zinc powder or ferrous sulfate, and add-on is controlled less than 10 mg/litre according to Gold Content in the waste liquid;
Described dechlorinating agent recycles with 10% NaOH or milk of lime, returns leaching vat after saturated to use as leaching agent;
Described dearsenic agent is the gac that is impregnated with copper, aluminium, manganese, chromium, calcium metallic element, and handle with landfill method saturated back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105627995A CN102002600B (en) | 2010-11-29 | 2010-11-29 | Environmentally-friendly chlorine water gold-extracting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105627995A CN102002600B (en) | 2010-11-29 | 2010-11-29 | Environmentally-friendly chlorine water gold-extracting process |
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| US9051626B2 (en) | 2011-09-27 | 2015-06-09 | Dundee, Technologies Durables Inc. | Method and a system for gold extraction with halogens |
| CN103194610B (en) * | 2013-04-24 | 2014-10-22 | 湖北鑫荣矿业有限公司 | Method for extracting gold from silver separating residues in nonferrous metal exploitation |
| CA2821467C (en) | 2013-07-18 | 2019-12-24 | Nichromet Extraction Inc. | Method for gold recovery on particules |
| CN103526041A (en) * | 2013-10-14 | 2014-01-22 | 昆明理工大学 | Method for reducing gold in chlorination selenium-dipping solution with reducing agent |
| US9206492B2 (en) | 2014-03-12 | 2015-12-08 | Dundee Sustainable Technologies Inc. | Closed loop method for gold and silver extraction by halogens |
| WO2015135053A1 (en) * | 2014-03-12 | 2015-09-17 | Dundee Sustainable Technologies Inc. | An improved closed loop method for gold and silver extraction by halogens |
| CN104480404B (en) * | 2014-12-22 | 2017-06-13 | 山东钢铁股份有限公司 | A kind of pressure piping valve steel and its manufacture method |
| CN106282555A (en) * | 2016-08-31 | 2017-01-04 | 胡中 | Recycling tail gas equipment and technique during a kind of dissolving gold, platinum, palladium |
| CN107021457A (en) * | 2017-06-07 | 2017-08-08 | 马驰 | It is hydrated the preparation method of chlorine solid |
| CN109289464B (en) * | 2018-11-02 | 2021-06-29 | 辽宁新瑞碳材料科技有限公司 | Recovery processing system of chlorine-containing high-temperature furnace tail gas |
| CN109289488B (en) * | 2018-11-02 | 2021-06-29 | 辽宁新瑞碳材料科技有限公司 | High temperature furnace chlorine, argon-containing tail gas treatment system |
| CN109852795B (en) * | 2019-03-12 | 2021-07-30 | 大冶有色设计研究院有限公司 | Comprehensive recovery method for improving dressing and smelting recovery rate of refractory metallurgical ore |
| CN112626562B (en) * | 2020-12-11 | 2022-03-01 | 国投金城冶金有限责任公司 | Method for recovering valuable elements from high-antimony copper anode slime |
| CN113562830B (en) * | 2021-08-12 | 2023-07-11 | 楚雄滇中有色金属有限责任公司 | Preparation method of copper smelting waste acid arsenic precipitating agent |
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| CN1118014A (en) * | 1994-08-28 | 1996-03-06 | 刘青海 | Simple method for recovering gold from waste material |
| CN1137067A (en) * | 1995-05-26 | 1996-12-04 | 河北地质学院 | Process for extracting gold from leaching solution |
| CN1147559A (en) * | 1996-06-18 | 1997-04-16 | 高大明 | Water-chlorine process for gold extraction |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118014A (en) * | 1994-08-28 | 1996-03-06 | 刘青海 | Simple method for recovering gold from waste material |
| CN1137067A (en) * | 1995-05-26 | 1996-12-04 | 河北地质学院 | Process for extracting gold from leaching solution |
| CN1147559A (en) * | 1996-06-18 | 1997-04-16 | 高大明 | Water-chlorine process for gold extraction |
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