CN111151550A - Harmless treatment process for arsenic-containing waste residues - Google Patents
Harmless treatment process for arsenic-containing waste residues Download PDFInfo
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- CN111151550A CN111151550A CN201811316324.0A CN201811316324A CN111151550A CN 111151550 A CN111151550 A CN 111151550A CN 201811316324 A CN201811316324 A CN 201811316324A CN 111151550 A CN111151550 A CN 111151550A
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- arsenic
- containing waste
- waste residue
- treatment process
- residue
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- 229910052785 arsenic Inorganic materials 0.000 title claims abstract description 60
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000002699 waste material Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000008569 process Effects 0.000 title claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 21
- 238000001723 curing Methods 0.000 claims description 19
- 239000004745 nonwoven fabric Substances 0.000 claims description 12
- 239000002244 precipitate Substances 0.000 claims description 12
- 239000011241 protective layer Substances 0.000 claims description 12
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical compound [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 claims description 9
- 229940000489 arsenate Drugs 0.000 claims description 9
- -1 polyethylene Polymers 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 6
- 230000008025 crystallization Effects 0.000 claims description 6
- 229960004887 ferric hydroxide Drugs 0.000 claims description 6
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 claims description 6
- BMWMWYBEJWFCJI-UHFFFAOYSA-K iron(3+);trioxido(oxo)-$l^{5}-arsane Chemical compound [Fe+3].[O-][As]([O-])([O-])=O BMWMWYBEJWFCJI-UHFFFAOYSA-K 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 5
- 239000007800 oxidant agent Substances 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 3
- 238000005273 aeration Methods 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 238000000975 co-precipitation Methods 0.000 claims description 3
- 239000000701 coagulant Substances 0.000 claims description 3
- 239000000084 colloidal system Substances 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910001385 heavy metal Inorganic materials 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000003020 moisturizing effect Effects 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 2
- 238000004537 pulping Methods 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims 2
- 230000002265 prevention Effects 0.000 claims 2
- 230000004888 barrier function Effects 0.000 claims 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims 1
- 238000005056 compaction Methods 0.000 claims 1
- 230000006872 improvement Effects 0.000 description 5
- 238000002386 leaching Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical group [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 208000007443 Neurasthenia Diseases 0.000 description 1
- 206010036105 Polyneuropathy Diseases 0.000 description 1
- 208000000453 Skin Neoplasms Diseases 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 206010003549 asthenia Diseases 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 201000005202 lung cancer Diseases 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000007824 polyneuropathy Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 201000000849 skin cancer Diseases 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 239000010891 toxic waste Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B30/00—Obtaining antimony, arsenic or bismuth
- C22B30/04—Obtaining arsenic
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a harmless treatment process for arsenic-containing waste residues, which comprises the steps of dehydrating, drying, grinding, dissolving and converting the ground waste residues, drying, crystallizing at high temperature, solidifying by adopting cement and then burying, wherein the treated waste residues have stable properties and meet the national specified exudation standard after burying.
Description
Technical Field
The invention relates to chemistry and metallurgy, and relates to a technology for treating toxic and harmful substances by using an ion replacement method, in particular to a harmless treatment process of arsenic-containing waste residues.
Background
Arsenic is a carcinogenic substance with strong toxic effect on human bodies and other organisms, can form a series of high-toxic compounds, can be absorbed by human bodies from respiratory tracts, skins and digestive tracts, can cause neurasthenia syndrome, polyneuropathy, skin mucous membrane lesion and the like, inorganic compounds of arsenic can cause lung cancer and skin cancer, most of arsenic in nature is associated with non-ferrous metal ores and enters a non-ferrous metal smeltery along with concentrate, the arsenic enters flue gas, waste water and waste residues in a sulfide or salt state to different degrees in the extraction process of non-ferrous metals, most of arsenic-containing substances are transferred into sludge to form arsenic-containing sludge after the treatment of the flue gas and the waste water, and because of lack of a proper treatment method, a large amount of arsenic-containing sludge is randomly stockpiled or discarded by enterprises, so that the arsenic-containing waste residues are changed into arsenic-containing waste residues, and the arsenic-containing waste residues form the most main environmental pollution source of the non-ferrous metal smeltery, the method has the advantages that the method has severe influence on the surrounding environment of enterprises and human health, currently, the solidification and stabilization treatment technology is generally adopted for treating toxic waste residues at home and abroad, the treatment cost is low, and the effect is good.
Disclosure of Invention
The invention aims to provide a harmless treatment process for arsenic-containing waste residues, which is characterized in that arsenic-containing waste materials are converted before cement solid-phone arsenic-containing waste materials, amorphous arsenic is converted into a stable crystal structure, and the treated arsenic-containing waste residues are stable in properties.
In order to achieve the purpose, the invention adopts the technical scheme that:
a harmless treatment process for arsenic-containing waste residues comprises the following steps:
1) dehydrating and drying the arsenic-containing waste residue, and grinding the arsenic-containing waste residue after drying, wherein the grinding particle size is smaller than 140 meshes;
2) adding a calcium hydroxide solution according to 1.5 times of the theoretical amount of a conversion agent required by the generation of insoluble arsenate from the arsenic content of the waste residue, stirring and reacting in a stirring barrel according to a liquid-solid ratio of 4:1, adding a proper amount of hydrogen peroxide to promote the conversion reaction of the arsenate when the stirring reaction starts, reacting for more than 4 hours, sampling and checking every 15 minutes after the reaction reaches 4 hours, and stopping stirring when the arsenic content of the solution is lower than 1 mg/l;
3) performing filter pressing on the solution after reaction by using a plate-and-frame filter press, and returning filtrate to the second batch of waste residue for treatment and recycling;
4) crushing the filter residue, drying the filter residue by hot air, and feeding the dried filter residue to a rotary kiln for high-temperature heat treatment crystallization, wherein the temperature of the rotary kiln is controlled at 800 ℃;
5) adding 20% of filter residue treated by the rotary kiln into cement according to the weight proportion, stirring and pulping, forming and curing, and spraying and moisturizing in the curing process;
6) carrying out pipeline recovery treatment on the waste liquid generated in the steps, conveying the waste liquid into a third-stage reaction tank through a conveying pump, adding a sodium hypochlorite oxidant into a first-stage reaction tank to oxidize trivalent arsenic in the waste water into pentavalent arsenic, adding calcium hydroxide and polyferric into a second-stage reaction tank, adjusting the pH value of the solution to generate ferric arsenate precipitate, precipitating and adsorbing the ferric arsenate precipitate by ferric hydroxide coprecipitation, and adding a coagulant aid PAM into a third-stage reaction tank to further remove suspended matters, arsenate precipitate, ferric hydroxide colloid and other heavy metal precipitates in water;
7) after being subjected to filter pressing by a filter press, the bottom mud in the sedimentation tank is sent to the step 4 for crystallization;
8) and backfilling the solidified arsenic-containing waste residue by adopting a landfill.
As a further improvement of the invention, the landfill site adopts a double-man anti-seepage system, and the field bottom anti-seepage layer is respectively a non-woven fabric protective layer, a gravel penetrating fluid collecting and draining layer, a non-woven fabric protective layer, a polyethylene anti-seepage film, a non-woven fabric protective layer, a geogrid reinforcing layer, a non-woven fabric protective layer, a polyethylene anti-seepage film, a bentonite compound and a compacted foundation from top to bottom.
As a further improvement of the invention, a permanent flood interception ditch is arranged outside the landfill site, the flood interception ditch adopts a rectangular section and has an integral concrete reinforcement pouring structure.
As a further improvement of the invention, an aeration stirring mixing device is added in the stirring barrel in the step 2.
As a further improvement of the invention, in the step 2, the fly ash is added according to 10 percent of the weight of the arsenic-containing waste.
As a further improvement of the invention, the concrete sample is placed in a cement concrete sample curing box at 24 ℃ for curing for 7 days after being cured and molded in the step 5, and then is taken out and cured for 21 days at room temperature.
The method has the beneficial effects that the arsenic-containing waste is treated by utilizing the processes of leaching, flocculation, roasting, curing and landfill, and the treated arsenic-containing waste is converted into a stable crystal structure from an amorphous state.
And after the cement is solidified, the leaching toxicity of arsenic in the waste residue is greatly reduced, and the leaching toxicity can meet the safety landfill pollution control standard of hazardous wastes (GB 18598-2001).
Detailed Description
A harmless treatment process for arsenic-containing waste residues comprises the following steps:
1) dehydrating and drying the arsenic-containing waste residue, grinding the arsenic-containing waste residue after drying, wherein the grinding particle size is smaller than 140 meshes, the reaction between the waste residue and the conversion agent is directly influenced by the grinding particle size, and the fine particle size can ensure that the conversion agent and the waste residue are in full contact exchange, so that the reaction is rapidly and efficiently carried out;
2) adding a calcium hydroxide solution according to 1.5 times of the theoretical amount of a conversion agent required by the generation of insoluble arsenate according to the arsenic content of the waste residue, carrying out stirring reaction in a stirring barrel according to a liquid-solid ratio of 4:1, adding a proper amount of hydrogen peroxide to promote the conversion reaction of the arsenate when the stirring reaction starts, wherein the reaction time is more than 4 hours, carrying out sampling inspection every 15 minutes after the reaction reaches 4 hours, stopping stirring when the arsenic content of the solution is lower than 1mg/l, and fully forming high-valence arsenic in the waste residue into stable low-valence arsenic by utilizing the strong oxidation effect of an oxidant and the interaction between the conversion agents;
3) performing filter pressing on the solution after reaction by using a plate-and-frame filter press, returning filtrate to the second batch of waste residue for treatment and recycling, removing the solution in the waste residue by using the filter pressing, facilitating drying and curing,
4) crushing the filter residue, drying the filter residue by hot air, feeding the dried filter residue back to a rotary kiln for high-temperature heat treatment crystallization, controlling the temperature of the rotary kiln at 800 ℃, and curing 80-85% of arsenic in the waste residue by the design of a high-temperature rotary kiln,
5) adding 20% of the filter residue into cement according to the weight proportion, stirring and slurrying, molding and curing, spraying and moisturizing in the curing process, performing stability treatment on the residual arsenic by curing,
6) carrying out pipeline recovery treatment on the waste liquid generated in the steps, conveying the waste liquid into a third-stage reaction tank through a conveying pump, adding a sodium hypochlorite oxidant into a first-stage reaction tank to oxidize trivalent arsenic in the waste water into pentavalent arsenic, adding calcium hydroxide and polyferric into a second-stage reaction tank, adjusting the pH value of the solution to generate ferric arsenate precipitate, precipitating and adsorbing the ferric arsenate precipitate by ferric hydroxide coprecipitation, and adding a coagulant aid PAM into a third-stage reaction tank to further remove suspended matters, arsenate precipitate, ferric hydroxide colloid and other heavy metal precipitates in water;
7) after being subjected to filter pressing by a filter press, the bottom mud in the sedimentation tank is sent to the step 4 for crystallization;
8) and backfilling the solidified arsenic-containing waste residue by adopting a landfill.
As a further preferable scheme of the invention, the landfill site adopts a double-man anti-seepage system, and the field bottom anti-seepage layer is respectively a non-woven fabric protective layer, a gravel penetrating fluid collecting and draining layer, a non-woven fabric protective layer, a polyethylene anti-seepage film, a non-woven fabric protective layer, a geogrid reinforcing layer, a non-woven fabric protective layer, a polyethylene anti-seepage film, a bentonite compound and a compacted foundation from top to bottom.
As a further preferable scheme of the invention, a permanent flood interception ditch is arranged outside the landfill site, the flood interception ditch adopts a rectangular section and is of an integral concrete reinforcement pouring structure.
In a further preferred embodiment of the present invention, an aeration stirring and mixing device is added in the stirring barrel in the step 2.
As a further preferable scheme of the invention, the fly ash is added in the step 2 according to 10 percent of the weight of the arsenic-containing waste.
As a further preferable scheme of the invention, the concrete sample is placed in a cement concrete sample curing box at 24 ℃ for curing for 7 days after being cured and molded in the step 5, and then is taken out and cured for 21 days at room temperature.
The method has the beneficial effects that the arsenic-containing waste is treated by utilizing the processes of leaching, flocculation, roasting, curing and landfill, and the treated arsenic-containing waste is converted into a stable crystal structure from an amorphous state.
Claims (6)
1. A harmless treatment process for arsenic-containing waste residues comprises the following steps:
1) dehydrating and drying the arsenic-containing waste residue, and grinding the arsenic-containing waste residue after drying, wherein the grinding particle size is smaller than 140 meshes;
2) adding a calcium hydroxide solution according to 1.5 times of the theoretical amount of a conversion agent required by the generation of insoluble arsenate from the arsenic content of the waste residue, stirring and reacting in a stirring barrel according to a liquid-solid ratio of 4:1, adding a proper amount of hydrogen peroxide to promote the conversion reaction of the arsenate when the stirring reaction starts, reacting for more than 4 hours, sampling and checking every 15 minutes after the reaction reaches 4 hours, and stopping stirring when the arsenic content of the solution is lower than 1 mg/l;
3) performing filter pressing on the solution after reaction by using a plate-and-frame filter press, and returning filtrate to the second batch of waste residue for treatment and recycling;
4) crushing the filter residue, drying the filter residue by hot air, and feeding the dried filter residue to a rotary kiln for high-temperature heat treatment crystallization, wherein the temperature of the rotary kiln is controlled at 800 ℃;
5) adding 20% of filter residue treated by the rotary kiln into cement according to the weight proportion, stirring and pulping, forming and curing, and spraying and moisturizing in the curing process;
6) carrying out pipeline recovery treatment on the waste liquid generated in the steps, conveying the waste liquid into a third-stage reaction tank through a conveying pump, adding a sodium hypochlorite oxidant into a first-stage reaction tank to oxidize trivalent arsenic in the waste water into pentavalent arsenic, adding calcium hydroxide and polyferric into a second-stage reaction tank, adjusting the pH value of the solution to generate ferric arsenate precipitate, precipitating and adsorbing the ferric arsenate precipitate by ferric hydroxide coprecipitation, and adding a coagulant aid PAM into a third-stage reaction tank to further remove suspended matters, arsenate precipitate, ferric hydroxide colloid and other heavy metal precipitates in water;
7) after being subjected to filter pressing by a filter press, the bottom mud in the sedimentation tank is sent to the step 4 for crystallization;
8) and backfilling the solidified arsenic-containing waste residue by adopting a landfill.
2. The harmless treatment process of arsenic-containing waste residue as claimed in claim 1, which is characterized in that: the landfill site adopts double industry anti-seepage system, and the barrier layer is respectively from top to bottom at the bottom of the field, and non-woven fabrics protective layer, rubble penetrant collect drainage blanket, non-woven fabrics protective layer, polyethylene prevention of seepage membrane, non-woven fabrics protective layer, geogrid enhancement layer, non-woven fabrics protective layer, polyethylene prevention of seepage membrane, bentonite complex, compaction ground.
3. The harmless treatment process of arsenic-containing waste residue as claimed in claim 1, which is characterized in that: the permanent flood intercepting ditch is arranged on the outer side of the landfill and adopts a rectangular cross section and an integral concrete reinforcement pouring structure.
4. The harmless treatment process of arsenic-containing waste residue as claimed in claim 1, which is characterized in that: and in the step 2, an aeration stirring mixing device is additionally arranged in the stirring barrel.
5. The harmless treatment process of arsenic-containing waste residue as claimed in claim 1, which is characterized in that: in the step 2, the fly ash is added according to 10 percent of the weight of the arsenic-containing waste.
6. The harmless treatment process of the arsenic-containing waste residue as claimed in any one of claims 1 to 5, wherein: and 5, after curing and forming, placing the concrete sample in a 24 ℃ cement concrete sample curing box for curing for 7 days, and then taking out the concrete sample for curing for 21 days at room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811316324.0A CN111151550A (en) | 2018-11-07 | 2018-11-07 | Harmless treatment process for arsenic-containing waste residues |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811316324.0A CN111151550A (en) | 2018-11-07 | 2018-11-07 | Harmless treatment process for arsenic-containing waste residues |
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| Publication Number | Publication Date |
|---|---|
| CN111151550A true CN111151550A (en) | 2020-05-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811316324.0A Pending CN111151550A (en) | 2018-11-07 | 2018-11-07 | Harmless treatment process for arsenic-containing waste residues |
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| Country | Link |
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| CN (1) | CN111151550A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB507647A (en) * | 1936-10-20 | 1939-06-19 | Krupp Fried Grusonwerk Ag | A process for removing sulphur, arsenic and other injurious ingredients from iron and iron alloys |
| WO1981002568A1 (en) * | 1980-03-10 | 1981-09-17 | Boliden Ab | A method for working-up arsenic-containing waste products |
| CN1457939A (en) * | 2003-05-13 | 2003-11-26 | 上海大学 | Process for treating industrial heavy metal solid slag |
| CN1788867A (en) * | 2004-12-16 | 2006-06-21 | 株式会社神户制钢所 | Method for treatment of arsenic-contaminated soil |
| CN101432232A (en) * | 2006-04-25 | 2009-05-13 | 通用电气公司 | Polymeric chelant and coagulant to treat metal-containing wastewater |
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2018
- 2018-11-07 CN CN201811316324.0A patent/CN111151550A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB507647A (en) * | 1936-10-20 | 1939-06-19 | Krupp Fried Grusonwerk Ag | A process for removing sulphur, arsenic and other injurious ingredients from iron and iron alloys |
| WO1981002568A1 (en) * | 1980-03-10 | 1981-09-17 | Boliden Ab | A method for working-up arsenic-containing waste products |
| CN1457939A (en) * | 2003-05-13 | 2003-11-26 | 上海大学 | Process for treating industrial heavy metal solid slag |
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