CN116477814A - Resource treatment process and system for waste liquid of hydrometallurgical extraction back iron - Google Patents
Resource treatment process and system for waste liquid of hydrometallurgical extraction back iron Download PDFInfo
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- CN116477814A CN116477814A CN202310722259.6A CN202310722259A CN116477814A CN 116477814 A CN116477814 A CN 116477814A CN 202310722259 A CN202310722259 A CN 202310722259A CN 116477814 A CN116477814 A CN 116477814A
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- waste liquid
- iron
- ion exchange
- hydrometallurgical extraction
- back iron
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 239000007788 liquid Substances 0.000 title claims abstract description 99
- 239000002699 waste material Substances 0.000 title claims abstract description 82
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 64
- 238000000605 extraction Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 37
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 238000004064 recycling Methods 0.000 claims abstract description 17
- 238000005238 degreasing Methods 0.000 claims abstract description 8
- 238000005342 ion exchange Methods 0.000 claims description 31
- 230000008929 regeneration Effects 0.000 claims description 10
- 238000011069 regeneration method Methods 0.000 claims description 10
- 239000011701 zinc Substances 0.000 claims description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 9
- 229910052725 zinc Inorganic materials 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 239000002351 wastewater Substances 0.000 claims description 6
- 238000004065 wastewater treatment Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 3
- 229960004887 ferric hydroxide Drugs 0.000 claims description 3
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 claims description 3
- 229940007718 zinc hydroxide Drugs 0.000 claims description 3
- 229910021511 zinc hydroxide Inorganic materials 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003456 ion exchange resin Substances 0.000 abstract description 6
- 229920003303 ion-exchange polymer Polymers 0.000 abstract description 6
- 229920005989 resin Polymers 0.000 abstract description 6
- 239000011347 resin Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 description 7
- 238000006386 neutralization reaction Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 239000002243 precursor Substances 0.000 description 5
- 229940044175 cobalt sulfate Drugs 0.000 description 4
- 229910000361 cobalt sulfate Inorganic materials 0.000 description 4
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 4
- 229940099596 manganese sulfate Drugs 0.000 description 4
- 235000007079 manganese sulphate Nutrition 0.000 description 4
- 239000011702 manganese sulphate Substances 0.000 description 4
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 4
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 4
- 229940053662 nickel sulfate Drugs 0.000 description 4
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- 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
- 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)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention provides a process and a system for recycling waste liquid of hydrometallurgical extraction, which aim at the characteristics that the waste liquid of hydrometallurgical extraction contains high-concentration hydrochloric acid, oil and a small amount of metallic iron and zinc ions, firstly, the suspended matters and part of the oil in the waste liquid are removed by pretreatment, then the oil in the waste liquid is further removed by special degreasing resin, and the produced water is used for removing iron and zinc ions in the waste liquid by ion exchange resin, so that the hydrochloric acid in the waste liquid is recovered, and the produced water is directly recycled for production. The hydrometallurgical extraction back iron waste liquid treatment process provided by the invention has the advantages of stable production operation and small occupied area, greatly reduces the treatment investment and operation cost of waste liquid, directly recycles produced water for production, and realizes the recycling utilization of the hydrometallurgical extraction back iron waste liquid.
Description
Technical Field
The invention relates to the technical field of industrial wastewater treatment, in particular to a process and a system for recycling waste liquid of hydrometallurgical extraction back iron.
Background
The new energy automobile market development is rapid, the high-speed development of the new energy automobile also brings explosive growth of the automobile power battery industry, the ternary precursor is an ideal precursor material of the positive electrode material of the automobile power battery, the power grid energy storage battery and the electric tool battery, the ternary precursor is produced independently from nickel sulfate, cobalt sulfate and manganese sulfate, the nickel sulfate, the cobalt sulfate and the manganese sulfate are produced by extracting through a wet gold treatment process, and the nickel sulfate, the cobalt sulfate and the manganese sulfate can generate extraction anti-iron waste liquid in the production process, wherein the waste liquid contains high-concentration hydrochloric acid, oil and a small amount of metallic iron and zinc ions. The currently adopted main stream treatment process comprises the steps of firstly adopting acid-base neutralization to adjust the pH value of the waste liquid, then carrying out oil removal and COD removal, and adopting an advanced oxidation process for COD removal at the rear end and an MVR evaporation process for evaporation due to extremely high salt content of the waste liquid after the acid-base neutralization, so that the pollution problem of the waste liquid of the extraction and back iron can be solved. However, the treatment process has the advantages of high investment cost, large occupied area, high medicament consumption, very high MVR operation energy consumption and very high operation cost.
The invention provides a new thought and process for recycling the waste liquid of hydrometallurgical extraction back iron, in order to further reduce the investment and operation cost of the waste liquid of hydrometallurgical extraction back iron, recover valuable resources in the waste liquid and improve the competitiveness of the production process.
Disclosure of Invention
Aiming at the characteristic that the waste liquid of hydrometallurgical extraction contains high-concentration hydrochloric acid, oil and a small amount of metallic iron and zinc ions, the invention aims to provide a process and a system for treating the waste liquid of hydrometallurgical extraction. The method solves the problem of pollution of the waste liquid of the hydrometallurgical extraction back iron, greatly reduces investment cost and operation cost, and saves land area.
The invention solves the technical problems by adopting the following technical scheme:
a process for treating hydrometallurgical extraction back iron waste liquid, comprising the steps of:
s1, pretreatment: the method comprises the steps that hydrometallurgical extraction back iron waste liquid enters a waste liquid regulating tank to be collected and regulated, and filtering is carried out to obtain clear liquid I;
s2, ion exchange degreasing: removing oil in the waste liquid through ion exchange oil removal to obtain clear liquid II, and returning the oil regenerated through ion exchange to a production end for recycling;
s3, ion exchange iron and zinc removal: removing iron and zinc ions in the wastewater through ion exchange of the clear liquid II; obtaining clear liquid III, and treating a small amount of waste liquid I containing iron and zinc ions regenerated by ion exchange into regenerated waste liquid;
s4, treating regeneration waste liquid: and a small amount of waste liquid I containing iron and zinc ions regenerated by ion exchange enters a regeneration waste liquid treatment system, the pH value is regulated to 8.0, iron and zinc ions form ferric hydroxide and zinc hydroxide precipitates, and treated waste water II enters an enterprise production waste water treatment system for treatment.
Preferably, in step S1, the filtering device is one or a combination of several of a precision filter, a ceramic filter membrane and a tube micro filter.
Preferably, in steps S1 and S2, the removal rate of COD is more than 90%, and the removal rate of oil is more than 98%.
Preferably, the COD content in the clear liquid II is less than 200mg/L, and the oil content is less than 2mg/L.
Preferably, the removal rate of iron and zinc ions in the step S3 is more than 90%, and the concentration of iron and zinc ions in the clear liquid III is less than 20mg/L.
Preferably, the clear liquid III can be directly recycled to the hydrometallurgical extraction production end.
A hydrometallurgical extraction back iron waste liquid treatment system is used for realizing the process, and comprises a pretreatment system, an ion exchange degreasing system, an ion exchange iron and zinc removal system and a regeneration waste liquid treatment system.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a method for recycling waste liquid of hydrometallurgical extraction back iron, which is characterized in that the waste liquid of hydrometallurgical extraction back iron contains high-concentration hydrochloric acid, oil and a small amount of metallic iron and zinc ions, firstly, suspended matters and a small amount of petroleum in the waste liquid are removed by pretreatment, then, main oil in the waste liquid is removed by special degreasing resin, and the produced water is used for removing iron and zinc ions in the waste liquid by ion exchange resin, so that the hydrochloric acid in the recovered waste liquid is directly recycled for production. The hydrometallurgical extraction back iron waste liquid treatment process provided by the invention has the advantages that the production operation is stable, the occupied area is small, the treatment investment and the operation cost of the waste liquid are greatly reduced, the produced water is directly recycled for the extraction end production, and the resource utilization of the hydrometallurgical extraction back iron waste liquid is realized.
Drawings
FIG. 1 is a flow chart of a process for recycling waste liquid of hydrometallurgical extraction back iron.
Detailed Description
In order to further describe the technical manner and efficacy of the present invention for achieving the intended purpose, the following detailed description of the embodiments, structures, features and efficacy of the invention refers to the accompanying drawings and examples.
The equipment, reagents, and the like involved in the present invention are all common commercial products.
FIG. 1 is a schematic illustration of the process flow of the present invention.
The recovery and utilization project of the power lithium battery with the annual production of 5 ten thousand tons of a certain enterprise adopts a hydrometallurgical process for the production and purification of nickel sulfate, cobalt sulfate and manganese sulfate, and the waste ternary lithium battery is used for producing the ternary nickel-cobalt-manganese precursor, and simultaneously, the waste metals such as copper, aluminum and the like are recovered. The main procedures can be divided into disassembly, crushing and sorting, acid leaching, extraction, precursor synthesis and the like, and extraction back iron waste liquid is generated in the extraction process, and the water quality and water quantity are shown in the following table 1:
TABLE 1 extraction of the Components of the anti-iron waste liquid
| Index (I) | Mother liquor | Unit (B) |
| Water volume | 100 | m³/d |
| Petroleum products | ≤150 | mg/L |
| COD Cr | ≤2000 | mg/L |
| HCl | ≤200 | g/L |
| Fe 2+ /Fe 3+ | ≤200 | mg/L |
| Zn 2+ | ≤200 | mg/L |
Example 1
A hydrometallurgical extraction back iron waste liquid treatment process comprises the following steps:
(S1) a pretreatment system: the method comprises the steps that hydrometallurgical extraction back iron waste liquid enters a waste liquid regulating tank to be collected and regulated, the waste liquid is lifted to a primary filtering device through a lifting pump, the filtering device adopts a precision filter, a pretreatment system mainly removes suspended matters and a small part of oil in the waste liquid, the removal rate of the pretreatment system on petroleum and COD (chemical oxygen demand) is respectively 35% and 15%, and clear liquid 1 is obtained after pretreatment;
(S2) an ion exchange degreasing system: the clear liquid I is subjected to an ion exchange degreasing system to remove oil in the waste liquid, the resin adopts special ion exchange resin (the type of the special ion exchange resin is not limited in the invention, and only the special ion exchange resin is needed to remove oil in the waste liquid; for example, ZGSO107 produced by Ningbo light-emitting resin Co., ltd.) and the removal rate of the system to petroleum and COD is respectively 98.2 percent and 90 percent, a resin catcher is arranged in the ion exchange system, clear liquid II is obtained after treatment, and the oil regenerated by the ion exchange is returned to a production end for recycling;
(S3) an ion exchange iron and zinc removal system: removing iron and zinc ions from the clear liquid II through an ion exchange iron and zinc removing system; the clear liquid III is obtained, the removal rate of iron and zinc ions is 92 percent and 95 percent respectively, a resin catcher is arranged in the ion exchange, and a small amount of waste liquid I containing iron and zinc ions regenerated by the ion exchange enters a regeneration waste liquid treatment system for treatment;
the type of the ion exchange resin in the ion exchange iron and zinc removing system is not limited in the invention, and only iron and zinc ions can be removed, for example, weak acid cation exchange resin can be selected.
(S4) a regeneration waste liquid treatment system: the waste liquid I which is regenerated by ion exchange and contains a small amount of iron and zinc ions accounts for about 5 percent, enters a regeneration waste liquid treatment system, adopts integrated equipment (the type of the integrated equipment is not limited in the invention, for example, an integrated waste water and waste liquid treatment device produced by Shandong Ai Like engineering machinery Co., ltd.) and the like, forms ferric hydroxide and zinc hydroxide precipitates by adjusting the pH value to about 8.0, and the treated waste water II enters an enterprise production waste water treatment system for treatment.
Example 1 in the process of treating waste liquid of hydrometallurgical extraction back iron, a precision filter, ion exchange oil removal, ion exchange iron and zinc removal and regeneration wastewater treatment system is used for recycling the waste liquid of extraction back iron.
The treatment process of comparative example 1 is an acid-base neutralization, air floatation oil removal, advanced oxidation COD removal and multi-effect evaporation crystallization treatment process.
The treatment process of comparative example 2 is an acid-base neutralization, air floatation oil removal, advanced oxidation COD removal and MVR evaporation crystallization process.
Table 2 shows the comparison of the process flows and the running costs of example 1 and comparative example
| Project | Example 1 | Comparative example 1 | Comparative example 2 |
| Simple process The said | Precision filter, ion exchange oil removal and ion removal Exchange deironing zinc + regeneration waste liquid treatment system | Acid-base neutralization, air floatation oil removal and advanced treatment COD+removing multi-effect evaporation crystallization by oxidation | Acid-base neutralization, air floatation oil removal and advanced treatment Oxidative COD+MVR removal evaporative crystallization |
| Treated water Quantity (mMei) d） | 100 | 100 | 100 |
| Floor occupation Accumulation (square meter) | 150 | 350 | 350 |
| Evaporating water Quantity (mMei) d） | 0 | 100 | 100 |
| Investment into Book (Wan) Yuan (Yuan) | 300 | 800 | 850 |
| Run into Book (Yuan/m) ³） | 200 | 600 | 590 |
The data show that the adoption of the technical scheme of the invention for treating the hydrometallurgical extraction back iron waste liquid has better economic benefit, and is characterized by low investment cost, low running cost and small occupied area. The invention saves a great amount of medicament cost because acid-base neutralization treatment is not needed, and simultaneously, the treated waste liquid is recycled without evaporation and crystallization, thereby greatly reducing the investment cost and the operation energy consumption of the treatment.
Example 2
Other conditions and operations were the same as in example 1 except that in step S1, the pretreatment system was a ceramic filtration membrane.
Example 3
Other conditions and operations were the same as in example 1 except that in step S1, the pretreatment system was tubular microfiltration membrane filtration.
The technical effects of example 2 and example 3 are the same as or equivalent to those of example 1.
The foregoing is merely exemplary of the present invention, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present invention, and these should also be regarded as the protection scope of the present invention, which does not affect the effect of the implementation of the present invention and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (7)
1. The hydrometallurgical extraction back iron waste liquid recycling treatment process is characterized by comprising the following steps of:
s1, pretreatment: the method comprises the steps that hydrometallurgical extraction back iron waste liquid enters a waste liquid regulating tank to be collected and regulated, and filtering is carried out to obtain clear liquid I;
s2, ion exchange degreasing: removing oil in the waste liquid through ion exchange oil removal to obtain clear liquid II, and returning the oil regenerated through ion exchange to a production end for recycling;
s3, ion exchange iron and zinc removal: removing iron and zinc ions in the wastewater through ion exchange of the clear liquid II; obtaining clear liquid III, and treating a small amount of waste liquid I containing iron and zinc ions regenerated by ion exchange into regenerated waste liquid;
s4, treating regeneration waste liquid: and a small amount of waste liquid I containing iron and zinc ions regenerated by ion exchange enters a regeneration waste liquid treatment system, the pH value is regulated to 8.0, iron and zinc ions form ferric hydroxide and zinc hydroxide precipitates, and treated waste water II enters an enterprise production waste water treatment system for treatment.
2. The process for recycling the hydrometallurgical extraction back iron waste liquid according to claim 1, wherein in the step S1, the filtering equipment is one or a combination of a plurality of fine filters, ceramic filtering membranes and tubular micro-filters.
3. The process for recycling the hydrometallurgical extraction back iron waste liquid according to claim 1, wherein in the steps S1 and S2, the removal rate of COD is more than 90%, and the removal rate of oil is more than 98%.
4. The hydrometallurgical extraction back iron waste liquid recycling treatment process according to claim 1, wherein the COD content in the clear liquid II is less than 200mg/L, and the oil content is less than 2mg/L.
5. The hydrometallurgical extraction back iron waste liquid recycling treatment process according to claim 1, wherein the removal rate of iron and zinc ions in the step S3 is more than 90%, and the concentration of iron and zinc ions in the clear liquid III is less than 20mg/L.
6. The process for recycling the waste liquid of the hydrometallurgical extraction back iron according to claim 1, wherein the clear liquid III can be directly reused in the hydrometallurgical extraction production end.
7. A hydrometallurgical extraction back iron waste liquid recycling treatment system for realizing the process of any one of claims 1-6, wherein the system comprises a pretreatment system, an ion exchange degreasing system, an ion exchange iron and zinc removal system and a regenerated waste liquid treatment system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310722259.6A CN116477814A (en) | 2023-06-19 | 2023-06-19 | Resource treatment process and system for waste liquid of hydrometallurgical extraction back iron |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310722259.6A CN116477814A (en) | 2023-06-19 | 2023-06-19 | Resource treatment process and system for waste liquid of hydrometallurgical extraction back iron |
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| Publication Number | Publication Date |
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| CN116477814A true CN116477814A (en) | 2023-07-25 |
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| CN202310722259.6A Pending CN116477814A (en) | 2023-06-19 | 2023-06-19 | Resource treatment process and system for waste liquid of hydrometallurgical extraction back iron |
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| CN (1) | CN116477814A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109279730A (en) * | 2018-12-05 | 2019-01-29 | 浙江海洋大学 | A kind of technique handling copper smelting heavy metal in waste water |
| CN109987742A (en) * | 2019-04-01 | 2019-07-09 | 河海大学 | Nickel hydrometallurgy process without drainage of waste water containing heavy metal, oil and high concentration salt-mixture |
| CN113652548A (en) * | 2021-05-24 | 2021-11-16 | 周翠平 | Anti-iron liquid resin adsorption process |
| CN113716779A (en) * | 2021-09-01 | 2021-11-30 | 珠海市科立鑫金属材料有限公司 | Treatment process of high-salinity wastewater |
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2023
- 2023-06-19 CN CN202310722259.6A patent/CN116477814A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109279730A (en) * | 2018-12-05 | 2019-01-29 | 浙江海洋大学 | A kind of technique handling copper smelting heavy metal in waste water |
| CN109987742A (en) * | 2019-04-01 | 2019-07-09 | 河海大学 | Nickel hydrometallurgy process without drainage of waste water containing heavy metal, oil and high concentration salt-mixture |
| CN113652548A (en) * | 2021-05-24 | 2021-11-16 | 周翠平 | Anti-iron liquid resin adsorption process |
| CN113716779A (en) * | 2021-09-01 | 2021-11-30 | 珠海市科立鑫金属材料有限公司 | Treatment process of high-salinity wastewater |
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| 张学洪等: "《工业废水处理工程实例》", 冶金工业出版社, pages: 69 - 70 * |
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