CN112374751A - Treatment method for green recycling of fly ash - Google Patents
Treatment method for green recycling of fly ash Download PDFInfo
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- CN112374751A CN112374751A CN202011251786.6A CN202011251786A CN112374751A CN 112374751 A CN112374751 A CN 112374751A CN 202011251786 A CN202011251786 A CN 202011251786A CN 112374751 A CN112374751 A CN 112374751A
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- fly ash
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/1305—Organic additives
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
- C04B33/1352—Fuel ashes, e.g. fly ash
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/16—Lean materials, e.g. grog, quartz
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/24—Manufacture of porcelain or white ware
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a treatment method for green recycling of fly ash, and relates to the technical field of environmental protection. The treatment method comprises the steps of crushing the fly ash into smaller particles, adding a proper amount of sodium-feeding fungi into the smaller particles, mixing the fly ash treated in the step (1) with a treatment formula, stirring, carrying out high-temperature heating treatment on the fly ash to enable the fly ash to perform catalytic reaction with the interior of the treatment formula, then increasing the heating temperature to enable the fly ash to be molten into liquid, finally filling the fly ash subjected to high-temperature treatment into a mold, and carrying out airing treatment until the fly ash is solidified into sand stones or crystals. The treatment formula of the invention is prepared by mixing quartz, kaolin, iron powder and sludge containing noble metal according to a certain proportion. The invention realizes green recycling of the fly ash resource, effectively prevents the fly ash from polluting the ecological environment and reduces the occupation proportion of the fly ash landfill to the land resource.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a treatment method for green recycling of fly ash.
Background
Along with social development, people are continuously concentrated in cities, the components of domestic garbage are increasingly complex, land resources are in short supply, and the treatment of the domestic garbage becomes particularly important.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a treatment method for green recycling of fly ash, which solves the problems in the background art.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
1. the treatment method for green recycling of fly ash is characterized by comprising the following steps:
(1) pulverizing fly ash into smaller particles, and adding appropriate amount of sodium-feeding fungi;
(2) mixing the fly ash treated in the step (1) with a treatment formula, and stirring;
(3) performing high-temperature heating treatment on the fly ash in a first heating temperature interval by adopting a heating device to enable the fly ash and the treatment formula to perform catalytic reaction;
(4) heating the fly ash at a second heating temperature interval by using a heating device to melt the fly ash into liquid;
(5) pouring the fly ash subjected to high-temperature treatment into a mold, and carrying out airing treatment until the fly ash is solidified into sandstone or crystals;
the treatment formula comprises the following components in parts by mass:
55-65 parts of quartz
35-45 parts of kaolin
5-15 parts of iron powder
1-2 parts of sludge containing noble metal
Further, the fly ash in the step (1) is obtained by performing desulfurization and dust removal treatment on flue gas generated by normal incineration of household garbage.
Further, the diameter of the pulverized fly ash particles in the step (1) is 0.1-1 mm.
Further, a double-helix conical stirrer is adopted for mixing and stirring in the step (2).
Further, the heating device in the step (3) and the step (4) is a melting furnace.
Further, in the step (3), the first heating temperature range is 400-800 ℃, the heat preservation time is 0.25-0.5 hours, and in the step (4), the second heating temperature range is 1200-1800 ℃, and the heat preservation time is 1-2 hours.
Furthermore, a device for detecting the moisture content is arranged in the mould in the step (5), and the airing time is adjusted according to the change of the moisture content in the fly ash.
Further, the ratio of the treatment formula to the fly ash in the step (2) is 1: 3.
further, the preparation method of the treatment formula is to crush the quartz, and stir the crushed quartz, the kaolin, the iron powder and the sludge containing the noble metal at normal temperature at a rotating speed of 40-50r/min to obtain a mixture.
Compared with the prior art, the invention has the beneficial effects that:
1. by adding the sodium-feeding fungi into the fly ash, the alkalinity of the fly ash can be effectively reduced without adding any chemical agent.
2. The fly ash is mixed with a treatment formula prepared from quartz, kaolin, iron powder and sludge containing noble metals, and the mixture is subjected to high-temperature treatment and mold curing, so that the cured sand stone and crystals can be used for paving road surfaces or be made into bricks and various artworks for buildings, thereby effectively preventing the fly ash from polluting the ecological environment, reducing the occupation proportion of fly ash landfill on land resources and realizing the recycling of fly ash resources.
Detailed description of the preferred embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The present invention provides an embodiment: a treatment method for green recycling of fly ash comprises the following steps:
(1) pulverizing fly ash into smaller particles, and adding appropriate amount of sodium-feeding fungi;
(2) mixing the fly ash treated in the step (1) with a treatment formula, and stirring;
(3) performing high-temperature heating treatment on the fly ash in a first heating temperature interval by adopting a heating device to enable the fly ash and the treatment formula to perform catalytic reaction;
(4) heating the fly ash at a second heating temperature interval by using a heating device to melt the fly ash into liquid;
(5) and (3) filling the fly ash subjected to high-temperature treatment into a mold, and airing until the fly ash is solidified into sandstone or crystals.
The treatment formula comprises the following components in parts by mass:
55-65 parts of quartz
35-45 parts of kaolin
5-15 parts of iron powder
1-2 parts of sludge containing noble metal
The preparation method of the treatment formula comprises the steps of crushing the quartz, and stirring the crushed quartz, the kaolin, the iron powder and the sludge containing the noble metals at normal temperature at a rotating speed of 40-50r/min to obtain a mixture.
The fly ash in the step (1) is obtained by performing desulfurization and dust removal treatment on flue gas generated by normal incineration of household garbage, a vortex pulverizer is adopted to pulverize the fly ash in the step (1), the pulverized particle diameter of the fly ash is 0.1-1 mm, sodium-feeding fungi are added into the fly ash in the step (1), the alkalinity of the fly ash can be effectively reduced under the condition of not adding any chemical reagent, and the mixing ratio of a treatment formula to the fly ash is 1: 3, a device double-helix conical stirrer used for mixing and stirring in the step (2) ensures that a treatment formula and the fly ash are fully and uniformly mixed, a heating device in the step (3) and the step (4) is a melting furnace, the first heating temperature range in the step (3) is 400-800 ℃, the heat preservation time is 0.5 hour, the heavy metals in the fly ash and the sludge containing the noble metals in the treatment formula can be ensured to carry out replacement reaction, the heavy metals in the fly ash are reduced and separated from the fly ash, the noble metals comprise gold, silver and platinum group metals, the dioxin in the fly ash can be effectively degraded in the heating range of 400-800 ℃, the quartz in the treatment formula can degrade the sulfide remained in the fly ash, the kwan-yin soil in the treatment formula can effectively adsorb the solid residues of the heavy metals, the sulfide and the dioxin, and the treatment formula prepared from the quartz, the kwan-yin soil, iron powder and the sludge containing the noble metals is mixed with the fly ash, after high-temperature treatment and mold solidification, the solidified sandstone and crystals can be used for paving road surfaces or manufacturing building bricks and various artware, so that the pollution of fly ash to the ecological environment is effectively prevented, the occupation proportion of fly ash landfill to land resources is reduced, the recycling of fly ash resources is realized, a moisture tester for detecting the moisture content is arranged in the mold in the step (4), the airing time is adjusted according to the change of the moisture content in the fly ash, and the solidified sandstone and crystals are ensured to have enough hardness.
The embodiments of the present invention have been described in detail, but the embodiments of the present invention are not limited to the above-described ones, and any equivalent substitutions and equivalent changes to the above-described embodiments are within the scope of the present invention.
Claims (9)
1. The treatment method for green recycling of fly ash is characterized by comprising the following steps:
(1) pulverizing fly ash into smaller particles, and adding sodium-feeding fungi into the particles;
(2) mixing the fly ash treated in the step (1) with a treatment formula, and stirring;
(3) performing high-temperature heating treatment on the fly ash in a first heating temperature interval by adopting a heating device to enable the fly ash and the treatment formula to perform catalytic reaction;
(4) heating the fly ash at a second heating temperature interval by using a heating device to melt the fly ash into liquid;
(5) pouring the fly ash subjected to high-temperature treatment in the step (4) into a mold, and airing until the fly ash is solidified into sandstone or crystals;
the treatment formula comprises the following components in parts by mass:
55-65 parts of quartz
35-45 parts of kaolin
5-15 parts of iron powder
1-2 parts of sludge containing noble metals.
2. The method for recycling and treating fly ash green according to claim 1, wherein: the fly ash in the step (1) is obtained by carrying out desulfurization and dust removal treatment on flue gas generated by normal incineration of household garbage.
3. The method for recycling and treating fly ash green according to claim 1, wherein: the diameter of the pulverized fly ash particles in the step (1) is 0.1-1 mm.
4. The method for recycling and treating fly ash green according to claim 1, wherein: and (3) a double-helix conical stirrer is adopted for mixing and stirring in the step (2).
5. The method for recycling and treating fly ash green according to claim 1, wherein: the heating device in the step (3) and the step (4) is a melting furnace.
6. The method for recycling and treating fly ash green according to claim 1, wherein: in the step (3), the first heating temperature range is 400-800 ℃, the heat preservation time is 0.25-0.5 hours, and in the step (4), the second heating temperature range is 1200-1800 ℃, and the heat preservation time is 1-2 hours.
7. The method for recycling and treating fly ash green according to claim 1, wherein: and (5) arranging a device for detecting the moisture content in the mould, and adjusting the airing time according to the change of the moisture content in the fly ash.
8. The method for recycling and treating fly ash green according to claim 1, wherein: the ratio of the treatment formula to the fly ash in the step (2) is 1: 3.
9. the method for recycling and treating fly ash green according to claim 1, wherein: the preparation method of the treatment formula comprises the step of crushing the quartz, and stirring the crushed quartz, the kaolin, the iron powder and the sludge containing the noble metal at the normal temperature at the rotating speed of 40-50r/min to obtain a mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011251786.6A CN112374751A (en) | 2020-11-11 | 2020-11-11 | Treatment method for green recycling of fly ash |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011251786.6A CN112374751A (en) | 2020-11-11 | 2020-11-11 | Treatment method for green recycling of fly ash |
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| CN112374751A true CN112374751A (en) | 2021-02-19 |
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Citations (11)
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| JP2009030097A (en) * | 2007-07-26 | 2009-02-12 | Daido Steel Co Ltd | Apparatus for recovering platinum group element |
| CN101580378A (en) * | 2009-06-19 | 2009-11-18 | 吉林大学 | Architectural pottery prepared by secondary waste flyash or bottom ash and method thereof |
| US20150252443A1 (en) * | 2014-03-06 | 2015-09-10 | Richard Watson | System and method for recovering precious metals from precursor-type ore materials |
| CN105344698A (en) * | 2015-11-25 | 2016-02-24 | 上海绿澄环保科技有限公司 | Method for treating specific pollutants through high-temperature melting technology |
| CN106082646A (en) * | 2016-06-15 | 2016-11-09 | 上海大学 | Electroplating sludge and domestic garbage incineration flyash is utilized to work in coordination with the melted method preparing glass sand |
| CN106756084A (en) * | 2016-12-12 | 2017-05-31 | 北京科技大学 | A kind of method for extracting noble metal as trapping agent with iron-based material |
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2020
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| US20150252443A1 (en) * | 2014-03-06 | 2015-09-10 | Richard Watson | System and method for recovering precious metals from precursor-type ore materials |
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| CN106082646A (en) * | 2016-06-15 | 2016-11-09 | 上海大学 | Electroplating sludge and domestic garbage incineration flyash is utilized to work in coordination with the melted method preparing glass sand |
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Application publication date: 20210219 |