CN109759415A - A kind of solidification landfill process of fluoride - Google Patents
A kind of solidification landfill process of fluoride Download PDFInfo
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- CN109759415A CN109759415A CN201910015542.9A CN201910015542A CN109759415A CN 109759415 A CN109759415 A CN 109759415A CN 201910015542 A CN201910015542 A CN 201910015542A CN 109759415 A CN109759415 A CN 109759415A
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Abstract
The invention discloses a kind of solidification landfill process of fluoride, includes the following steps: that the 20-30 times of water measured is added into solid slag 1) with solid slag poidometer, impregnate 1-3 hours；2) calcium compound of 2%-6% is added, stirs evenly；3) aluminium compound of 0.5-1.2 ‰ is added, stirs evenly, muddy is made；4) it is conserved 8-14 days in landfill maintenance area, the solidified body of formation.The present invention is used as defluorinating agent using calcium chloride hexahydrate and aluminium polychloride (PAC), can carry out effectively stabilizing solidification to fluoride in slag from delining, its Leaching fluoride of the solidified body of formation reaches the requirement of security landfill.
Description
Technical field
The invention belongs to field for the treatment of of solid waste, and in particular to a kind of solidification landfill process of fluoride.
Background technique
In the industrial production, especially metallurgical industry production and all kinds of minings produce, in production various product
Meanwhile various fluorine-containing solid/liquid danger wastes are inevitably generated, the requirement with country to environment protection emission is increasingly
How height, the various fluorine-containing solid/liquid danger wastes severely exceeded for these fluorinated volumes carry out environmental protection treatment, are enterprises
Cardinal task.Such as in electrolytic aluminium factory production process, a large amount of solid slag is unavoidably generated, especially in overhaul
During, the waste residues such as a large amount of fluorine-containing useless cathode and anode carbon block can be generated.According to People's Republic of China's relevant criterion, electricity
Solution aluminium overhaul waste residue belongs to hazardous solid waste, and slag from delining is made of many kinds of substance, and wherein most materials are fluorine-containing, leads to slag from delining
Middle fluoride severely exceeds, if using lime as stabilizer, since the alkalinity of lime leads to fluorination produce not soluble in water
Raw alkali soluble phenomenon considerably increases the content of fluoride in leachate, and under acid, alkaline environment, insoluble fluorine in slag from delining
Sour molten, alkali soluble phenomenon can occur in succession for compound, and leaching fluoride is caused persistently to increase.In China, for above-mentioned fluorine-containing waste residue one
As take the mode of landfill to be handled, if Chinese patent CN101612626A discloses a kind of processing method of electrolytic waste slag,
Itself the following steps are included: 1, by cinder field plan for land be several waste pits (1), waste pit bottom is set as slope shape, and
It cheats bottom lowest part and catch pit is set；2, waste pit is excavated, excavates by several times, only excavates a waste pit every time；3, it will excavate
Waste pit carries out foundation anti-seepage processing；4, waste residue is stacked in waste pit, by direction from high to low carry out segmentation stack waste residue,
After leveling compacting, Surface mulch processing is carried out.Above-mentioned technology by carrying out foundation anti-seepage processing, come stop in waste residue fluorine ion to
The surrounding of soil is spread, and plays the role of soil protection and underground water.But the fluorine-containing solid slag in above-mentioned technology is straight
Capable landfill is tapped into, prevents fluorine ion in waste residue from entering soil and groundwater by the foundation anti-seepage processing using waste pit, but
It is that, when the protective layer that ground Anti-seeping technology is formed is leaked because of the earth's crust or what reason, the fluorine ion in waste residue just loses
Protective barrier has been gone, will directly enter soil and groundwater, pollute environment, and be difficult to repair.
To solve the above-mentioned problems, researcher begins one's study pre-processes by above-mentioned solid slag, that is,
Chelating agent is added into solid slag before landfill, or cement and carbon are added in above-mentioned solid slag, reaches in solid slag
After forming the substance of hyposmosis on surface, then buried.Although above-mentioned technology can be hypotonic by being formed on solid slag
Saturating substance reduces content of fluoride ion, but the content of fluoride ion for passing through above-mentioned pretreated solid slag far can not meet
Standard requirements F < 100mg/L in " hazardous waste judging standard-leaching characteristic identification ", while the processed in units cost of waste residue is high
It is expensive.
Summary of the invention
Based on this, the present invention provides a kind of solidification landfill process of fluoride, is able to solve the steady of soluble fluoride
Surely change problem of solidification.
The present invention is achieved through the following technical solutions:
A kind of solidification landfill process of fluoride, includes the following steps: 1) with solid slag poidometer, adds into solid slag
Enter the 20-30 times of water measured, impregnates 1-3 hours；2) calcium compound of 2%-6% is added, stirs evenly；3) it is added 0.5-1.2's ‰
Aluminium compound stirs evenly, and muddy is made；4) it is conserved 8-14 days in landfill maintenance area, the solidified body of formation.
In wherein some embodiments, solid slag is electrolytic aluminium overhaul waste residue in the step 1).
In wherein some embodiments, the partial size of the electrolytic aluminium overhaul waste residue is less than or equal to 100mm.
In wherein some embodiments, calcium compound is calcium chloride hexahydrate in the step 2.
In wherein some embodiments, the particle size of the calcium chloride hexahydrate is less than or equal to 1mm.
In wherein some embodiments, aluminium compound is aluminium polychloride in the step 3).
In wherein some embodiments, the particle size of the aluminium polychloride is less than or equal to 1mm.
Compared with prior art, the invention has the following beneficial effects:
The present invention is used as defluorinating agent using calcium chloride hexahydrate and aluminium polychloride (PAC), can have to fluoride in slag from delining
The stabilisation of effect solidifies, its Leaching fluoride of the solidified body of formation reaches the requirement of security landfill.Fluoride and calcium chloride
Stable calcirm-fluoride not soluble in water is formed, the fluoride in slag from delining can be effectively removed, is the harmless of waste slag of electrolytic aluminium
Change processing and foundation is provided.The present invention not will increase useless compared with using dosage of the lime as stabilizer to greatly reduce using calcium chloride
The whole pH of object, not will lead to the increase of insoluble fluoride in slag from delining.Landfill process of the present invention is simple, efficiently solves
The innocuity treatment problem of slag from delining.
Figure of description
Fig. 1 is the solidification landfill process figure of fluoride of the present invention.
Specific embodiment
In order to better illustrate the present invention, it is further described below by embodiment.
Embodiment 1
A kind of solidification landfill process of fluoride includes the following steps: 1) with electrolytic aluminium overhaul waste residue poidometer, to electrolytic aluminium
The water of 30 times of amounts is added in overhaul waste residue, impregnates 1 hour；2) 2% calcium chloride hexahydrate is added, stirs evenly；3) 0.5 ‰ are added
Aluminium polychloride, stir evenly, muddy be made；4) landfill maintenance area conserve 8 days, the solidified body of formation, using fluorine from
Sub- analyzer carries out Fluorine Ion Determination, and the concentration for measuring fluorine ion is 50.3 mg/L, is lower than " hazardous waste judging standard-leaching
Toxicity identify " in standard requirements.
Embodiment 2
A kind of solidification landfill process of fluoride includes the following steps: 1) with electrolytic aluminium overhaul waste residue poidometer, useless to solid
The water of 20 times of amounts is added in slag, impregnates 3 hours；2) 6% calcium chloride hexahydrate is added, stirs evenly；3) 1.2 ‰ polymerization is added
Aluminium chloride stirs evenly, and muddy is made；4) it is conserved 14 days in landfill maintenance area, the solidified body of formation is analyzed using fluorine ion
Instrument carries out Fluorine Ion Determination, and the concentration for measuring fluorine ion is 43.5 mg/L, lower than " hazardous waste judging standard-Leaching mirror
Standard requirements in not ".
Embodiment 3
A kind of solidification landfill process of fluoride includes the following steps: 1) with electrolytic aluminium overhaul waste residue poidometer, useless to solid
The water of 25 times of amounts is added in slag, impregnates 2 hours；2) 4% calcium chloride hexahydrate is added, stirs evenly；3) 1 ‰ polymerization chlorine is added
Change aluminium, stirs evenly, muddy is made；4) it is conserved 10 days in landfill maintenance area, the solidified body of formation uses fluorine ion analyzer
Fluorine Ion Determination is carried out, the concentration for measuring fluorine ion is 36.7 mg/L, lower than " hazardous waste judging standard-Leaching mirror
Standard requirements in not ".
Embodiment 4
A kind of solidification landfill process of fluoride includes the following steps: 1) with electrolytic aluminium overhaul waste residue poidometer, useless to solid
The water of 20 times of amounts is added in slag, impregnates 2 hours；2) 5% calcium chloride hexahydrate is added, stirs evenly；3) 0.8 ‰ polymerization is added
Aluminium chloride stirs evenly, and muddy is made；4) it is conserved 12 days in landfill maintenance area, the solidified body of formation is analyzed using fluorine ion
Instrument carries out Fluorine Ion Determination, and the concentration for measuring fluorine ion is 40.8 mg/L, lower than " hazardous waste judging standard-Leaching mirror
Standard requirements in not ".
The above embodiments are merely examples for clarifying the description, and does not limit the embodiments.For institute
For the those of ordinary skill in category field, other various forms of variations or change can also be made on the basis of the above description
It is dynamic.There is no necessity and possibility to exhaust all the enbodiments.And obvious variation extended from this or change
The dynamic protection scope still in the invention.
Claims (7)
1. a kind of solidification landfill process of fluoride, which comprises the steps of: 1) with solid slag poidometer,
The 20-30 times of water measured is added into solid slag, impregnates 1-3 hours；2) calcium compound of 2%-6% is added, stirs evenly；3) add
The aluminium compound for entering 0.5-1.2 ‰, stirs evenly, and muddy is made；4) it is conserved 8-14 days in landfill maintenance area, the solidification of formation
Body.
2. the solidification landfill process of fluoride according to claim 1, which is characterized in that solid is useless in the step 1)
Slag is electrolytic aluminium overhaul waste residue.
3. the solidification landfill process of fluoride according to claim 2, which is characterized in that the electrolytic aluminium overhaul waste residue
Partial size be less than or equal to 100mm.
4. the solidification landfill process of fluoride according to claim 1, which is characterized in that calcification is closed in the step 2
Object is calcium chloride hexahydrate.
5. the solidification landfill process of fluoride according to claim 4, which is characterized in that the grain of the calcium chloride hexahydrate
Diameter size is less than or equal to 1mm.
6. the solidification landfill process of fluoride according to claim 1, which is characterized in that calorize is closed in the step 3)
Object is aluminium polychloride.
7. the solidification landfill process of fluoride according to claim 6, which is characterized in that the grain of the aluminium polychloride
Diameter size is less than or equal to 1mm.
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| CN201910015542.9A CN109759415A (en) | 2019-01-08 | 2019-01-08 | A kind of solidification landfill process of fluoride |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113732009A (en) * | 2021-08-13 | 2021-12-03 | 广西博世科环保科技股份有限公司 | Long-term stabilization and recycling method for overhaul slag waste refractory material |
| CN113929413A (en) * | 2020-07-08 | 2022-01-14 | 宁夏宸宇环保科技有限公司 | Fluorine-containing hazardous waste stabilization solidified body and preparation method thereof |
| CN115382879A (en) * | 2022-09-30 | 2022-11-25 | 贵州星河环境技术有限公司 | Method and equipment for innocent treatment of overhaul residues and fly ash |
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| CN101444660A (en) * | 2008-12-30 | 2009-06-03 | 吴正建 | Innocent treatment of cyanide and fluoride in solid waste residues and recycling process thereof |
| CN105801046A (en) * | 2016-02-04 | 2016-07-27 | 周益辉 | Cadmium-containing waste residue curing agent as well as preparation method and application thereof |
| CN105923643A (en) * | 2016-04-12 | 2016-09-07 | 郑州鸿跃环保科技有限公司 | Method and system of recycling calcium fluoride from aluminium electrolysis cell overhaul slag |
| CN106512279A (en) * | 2016-10-28 | 2017-03-22 | 新中天环保股份有限公司 | Harmless remediation method and device of electrolytic aluminum waste slag and contaminated soil of electrolytic aluminum waste slag |
| CN106565120A (en) * | 2016-11-07 | 2017-04-19 | 中国铝业股份有限公司 | Hazard-free treatment and utilization method for aluminium electrolysis waste slot liner |
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- 2019-01-08 CN CN201910015542.9A patent/CN109759415A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444660A (en) * | 2008-12-30 | 2009-06-03 | 吴正建 | Innocent treatment of cyanide and fluoride in solid waste residues and recycling process thereof |
| CN105801046A (en) * | 2016-02-04 | 2016-07-27 | 周益辉 | Cadmium-containing waste residue curing agent as well as preparation method and application thereof |
| CN105923643A (en) * | 2016-04-12 | 2016-09-07 | 郑州鸿跃环保科技有限公司 | Method and system of recycling calcium fluoride from aluminium electrolysis cell overhaul slag |
| CN106512279A (en) * | 2016-10-28 | 2017-03-22 | 新中天环保股份有限公司 | Harmless remediation method and device of electrolytic aluminum waste slag and contaminated soil of electrolytic aluminum waste slag |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113929413A (en) * | 2020-07-08 | 2022-01-14 | 宁夏宸宇环保科技有限公司 | Fluorine-containing hazardous waste stabilization solidified body and preparation method thereof |
| CN113732009A (en) * | 2021-08-13 | 2021-12-03 | 广西博世科环保科技股份有限公司 | Long-term stabilization and recycling method for overhaul slag waste refractory material |
| CN115382879A (en) * | 2022-09-30 | 2022-11-25 | 贵州星河环境技术有限公司 | Method and equipment for innocent treatment of overhaul residues and fly ash |
| CN115382879B (en) * | 2022-09-30 | 2024-02-06 | 贵州星河环境技术有限公司 | Harmless treatment method and equipment for overhaul slag and fly ash |
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Application publication date: 20190517 |