CN117964269A - Granulation method special for fly ash recycling - Google Patents
Granulation method special for fly ash recycling Download PDFInfo
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- CN117964269A CN117964269A CN202311703239.0A CN202311703239A CN117964269A CN 117964269 A CN117964269 A CN 117964269A CN 202311703239 A CN202311703239 A CN 202311703239A CN 117964269 A CN117964269 A CN 117964269A
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- fly ash
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- granulating
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- 239000010881 fly ash Substances 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004064 recycling Methods 0.000 title claims abstract description 18
- 238000005469 granulation Methods 0.000 title claims description 29
- 230000003179 granulation Effects 0.000 title claims description 29
- 239000002245 particle Substances 0.000 claims abstract description 62
- 239000011230 binding agent Substances 0.000 claims abstract description 43
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 19
- 239000003638 chemical reducing agent Substances 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- 239000002912 waste gas Substances 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000002956 ash Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 239000011164 primary particle Substances 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 5
- 239000000571 coke Substances 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 claims description 3
- 238000000921 elemental analysis Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 abstract description 8
- 238000002844 melting Methods 0.000 abstract description 8
- 230000008018 melting Effects 0.000 abstract description 8
- 239000011490 mineral wool Substances 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 description 24
- 230000001070 adhesive effect Effects 0.000 description 24
- 239000003570 air Substances 0.000 description 6
- 239000011449 brick Substances 0.000 description 5
- 238000004876 x-ray fluorescence Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000006298 dechlorination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/022—Agglomerated materials, e.g. artificial aggregates agglomerated by an organic binder
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/002—Use of waste materials, e.g. slags
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/02—Pretreated ingredients
- C03C1/026—Pelletisation or prereacting of powdered raw materials
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a special granulating method for recycling fly ash, which relates to the technical field of fly ash treatment, and comprises the following steps: the fly ash, the organic binder and the inorganic binder are put into a proportioning machine for proportioning and then are conveyed to a granulator for rolling and granulating to obtain semi-finished fly ash particles, or the fly ash is conveyed to the granulator for rolling and granulating and then is mixed with the organic binder and the inorganic binder to obtain semi-finished fly ash particles, and finally the semi-finished fly ash particles are dried and conveyed to a curing bin for curing to obtain finished fly ash particles; the finally obtained finished fly ash particles can meet the properties of particle size, strength and the like required by fly ash brickmaking, ceramsite making, glass body making by high-temperature melting of fly ash, rock wool making and the like, so that the fly ash resources are fully utilized, and the fly ash resources can be effectively utilized.
Description
Technical Field
The invention relates to the technical field of fly ash treatment, in particular to a special granulating method for fly ash recycling.
Background
Fly ash generated after sludge incineration, semi-dry flue gas purification and garbage incineration contains a large amount of harmful substances, and is easy to pollute underground water, soil and air.
The traditional fly ash treatment mode is to convey the fly ash to a landfill for landfill after innocent treatment, and the innocent treatment can reduce harmful substances in the fly ash and reduce the pollution of the fly ash to the environment.
However, for the treatment of the fly ash, only the fly ash is buried, so that the treatment cost, such as the equipment cost for harmless treatment, is wasted, the landfill site has certain requirements, and when the treatment amount of the fly ash is large, the geological quality is influenced, so that the environment is influenced.
Based on the above, the invention provides a special granulation method for recycling fly ash, which can recycle the fly ash without landfill treatment.
Disclosure of Invention
The invention aims to provide a special granulation method for fly ash recycling, which solves the following technical problems:
how to improve the utilization rate of the fly ash resources and avoid secondary pollution of the fly ash in the process of conveying, utilizing and recycling.
The aim of the invention can be achieved by the following technical scheme:
A special granulation method for fly ash recycling comprises the following steps:
the first step: after clean wet ash with the water content of 30-50% is dried, the fly ash component is analyzed by using on-line elemental analysis equipment, and when the fly ash component and the water meet the granulating condition at the same time, the fly ash is put into a batching machine for preparing batching;
The clean wet ash is obtained after water washing and dechlorination, and the water content is generally above 35 percent, and the clean wet ash with the water content of 30-50 percent is selected and dried, and then the water content is reduced to 5-20 percent.
And a second step of: two cases are included, each as follows;
Case one: weighing (2-10%) of organic binder and inorganic binder, and mixing with fly ash to obtain granulation raw material; conveying the granulation raw materials to a granulator for rolling granulation to obtain semi-finished fly ash particles with the particle size of 0.5-5 cm;
And a second case: conveying the fly ash raw materials in the proportioning machine to a granulator for rolling granulation to obtain fly ash primary particles, adding an organic binder and an inorganic binder with the mass ratio of (0.5-2%) (2-10%) into the fly ash primary particles, uniformly mixing, and enabling the organic binder and the inorganic binder to be wrapped on the surfaces of the fly ash particles to finally obtain semi-finished fly ash particles with the particle size of 0.5-5 cm;
Wherein the organic adhesive is cement, sand stone and the like; the granulation process can be divided into direct granulation in case one and wrapping granulation in case two; the direct granulation can be carried out by mixing fly ash, organic binder and inorganic binder uniformly by a batching machine, then conveying the mixture to a granulator for rolling granulation, fully mixing raw materials, and having uniform components and high structural strength, thus being applicable to the processes of fly ash brick making, ceramsite, glass body and the like; the fly ash is prepared into fly ash primary particles after being packed and granulated, and then an organic binder and an inorganic binder are added to wrap the outside of the small particles to form a mixed wrapping layer, wherein the fly ash particles have more than two layers of structures; according to different structures and component proportions, the fly ash particles and products have different functions, such as brick making, brick and ceramsite density in a ceramsite preparation process, melting speed of particles in a glass body process and the like.
And a third step of: drying the semi-finished fly ash particles, and conveying the dried semi-finished fly ash particles to a curing bin for curing to obtain finished fly ash particles; the curing process can promote the full reaction and bonding of fly ash, organic binder and inorganic binder.
In a further aspect of the invention: in the first step, clean wet ash is dried by a rotary kiln and a drying furnace.
In a further aspect of the invention: the mass ratio of the fly ash to the total amount of the organic binder and the inorganic binder is (80-95): (5.5-12).
In a further aspect of the invention: in the second step, a reducing agent is added to both the organic binder and the inorganic binder, the amount of reducing agent being 1-2% of the total amount of the organic binder and the inorganic binder.
In a further aspect of the invention: the reducing agent is one or two of coke and carbon powder.
In a further aspect of the invention: in the second step, the rolling pressure of the granulator is 0.3-0.5MPa, and the semi-finished fly ash particles with the water content of 10-15% and the particle size of 0.5-3cm are obtained.
In a further aspect of the invention: in the second step, the rolling pressure of the granulator is 5-8MPa, and the semi-finished fly ash particles with the water content of 3-5% and the particle size of 1-5cm are obtained.
In a further aspect of the invention: in the third step, the semi-finished fly ash particles are dried by a hot air dryer and then conveyed to a curing warehouse to be cured for 1-2 days.
In a further aspect of the invention: the waste gas generated in the granulator, the drying furnace and the curing bin is filtered and purified by waste gas treatment equipment to reach the standard and then is discharged; and the slag formed by stacking, stirring and transporting materials in the granulator, the drying furnace and the curing bin and the slag collected in the waste gas treatment equipment can be conveyed to the batching machine for recycling.
In a further aspect of the invention: the low-quality heat source can meet the heat required by drying and solidifying materials, and the heat source can use drying furnace waste gas, low-quality steam of a power plant, waste heat steam and hot air generated in the granulating method.
The invention has the beneficial effects that:
The invention selects the proportion of raw materials, the water content and the proper granulation grain diameter and pressure of a granulator according to different application processes; the proper proportion of the organic binder and the inorganic binder can increase the additional attribute of the fly ash particles, wherein the organic binder can improve the granulating effect and strength, reduce the curing time and improve the production efficiency; the inorganic adhesive can increase the content of calcium, magnesium, silicon and aluminum in the fly ash particles, so that the structural strength of the particles is enhanced, and the melting temperature is reduced; the finally obtained finished fly ash particles can meet the properties of particle size, strength and the like required by fly ash brickmaking, ceramsite making, glass body making by high-temperature melting of fly ash, rock wool making and the like, so that the fly ash resources are fully utilized, and the fly ash resources can be effectively utilized.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a flow chart of a method of one embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, the embodiment provides a special granulation method for recycling fly ash, which aims to apply the prepared fly ash particles to the processes of brick making, ceramsite, glass body and the like, and specifically comprises the following steps:
The first step: the clean wet ash with the water content of 30-50% is dried by a rotary kiln and a drying furnace, and then the components of the fly ash are analyzed by using an XRF (X-ray diffraction) and other online element analysis equipment, and when the components and the water content of the fly ash meet the granulating condition at the same time, the fly ash is put into a batching machine for preparing batching;
And a second step of: weighing (2-10%) of organic adhesive and inorganic adhesive, and adding reducing agent into the organic adhesive and inorganic adhesive, wherein the dosage of the reducing agent is 1-2% of the total amount of the organic adhesive and the inorganic adhesive; finally, the mixed organic adhesive, inorganic adhesive and reducing agent are put into a batching machine to be uniformly mixed with fly ash, so as to obtain a granulating raw material; conveying the granulated raw materials to a granulator for rolling granulation, wherein the rolling pressure of the granulator is 0.3-0.5MPa, and obtaining semi-finished fly ash particles with the water content of 10-15% and the particle size of 0.5-3 cm.
Wherein the mass ratio of the fly ash to the total amount of the organic binder and the inorganic binder is (80-95): (5.5-12); and the reducing agent can be one or two of coke and carbon powder;
And a third step of: and (3) drying the semi-finished fly ash particles by a hot air dryer, conveying the dried semi-finished fly ash particles to a curing bin for curing for 1-2 days, and finally obtaining the finished fly ash particles.
Example 2
Referring to fig. 1, the embodiment provides a special granulation method for recycling fly ash, which aims to apply the prepared fly ash particles to processes of ceramsite, glass body, rock wool and the like, and specifically comprises the following steps:
The first step: the clean wet ash with the water content of 30-50% is dried by a rotary kiln and a drying furnace, and then the components of the fly ash are analyzed by using an XRF (X-ray diffraction) and other online element analysis equipment, and when the components and the water content of the fly ash meet the granulating condition at the same time, the fly ash is put into a batching machine for preparing batching;
And a second step of: conveying the fly ash raw material in the proportioning machine to a granulator for rolling granulation to obtain fly ash primary particles, wherein the rolling pressure of the granulator is 5-8MPa; weighing (2-10%) of organic adhesive and inorganic adhesive, and adding reducing agent into the organic adhesive and inorganic adhesive, wherein the dosage of the reducing agent is 1-2% of the total amount of the organic adhesive and the inorganic adhesive; and finally, adding the mixed organic adhesive, inorganic adhesive and reducing agent into the semi-finished fly ash particles, and uniformly mixing, so that the organic adhesive and the inorganic adhesive are wrapped on the surfaces of the fly ash primary particles, and finally obtaining the semi-finished fly ash particles with the water content of 3-5% and the particle size of 1-5 cm.
Wherein the mass ratio of the fly ash to the total amount of the organic binder and the inorganic binder is (80-95): (5.5-12); and the reducing agent can be one or two of coke and carbon powder;
And a third step of: and (3) drying the semi-finished fly ash particles by a hot air dryer, conveying the dried semi-finished fly ash particles to a curing bin for curing for 1-2 days, and finally obtaining the finished fly ash particles.
In the embodiment 1-2, the waste gas generated in the granulator, the drying furnace and the curing bin is filtered and purified by waste gas treatment equipment and is discharged after reaching standards; and the material slag formed by stacking, stirring and transporting materials in the granulator, the drying furnace and the curing bin and collected in the waste gas treatment equipment can be conveyed to the batching machine for recycling; the low-quality heat source can meet the heat required by drying and solidifying materials, and the heat source can use waste gas of a drying furnace, low-quality steam of a power plant, waste heat steam and hot air generated in the granulating method, so that the low-quality energy source can be comprehensively utilized, and the energy saving purpose is achieved.
The working principle of the invention is as follows:
According to the invention, the raw material component data of the fly ash, the organic binder and the inorganic binder are analyzed by utilizing the online element analysis equipment such as XRF (X-ray fluorescence) and the like, and raw material proportioning is carried out according to the data analysis result, so that the prepared fly ash particles can meet the requirements of the processes such as brick making, ceramsite making, glass body making and rock wool making, and meanwhile, the influence of the fluctuation of the original fly ash components on the quality of a final product can be avoided, and the effective utilization of fly ash resources is ensured; selecting the proportion of raw materials, the water content and the proper granulation particle size and pressure of a granulator according to different application processes; meanwhile, the proper proportion of the organic adhesive and the inorganic adhesive can increase the additional properties of the fly ash particles, such as increasing the particle strength, reducing the melting temperature, increasing the melting rate, reducing the energy consumption, reducing the later operation difficulty and the like; specifically, the organic adhesive can improve the granulating effect and strength, reduce the curing time and improve the production efficiency; the inorganic adhesive can increase the content of calcium, magnesium, silicon and aluminum in the fly ash particles, so that the structural strength of the particles is enhanced, and the melting temperature is reduced; the finally obtained finished fly ash particles can meet the properties of particle size, strength and the like required by fly ash brickmaking, ceramsite making, glass body making by high-temperature melting of fly ash, rock wool making and the like, so that the fly ash resources are fully utilized, and the resources can be effectively saved.
In the description of the present invention, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (10)
1. The special granulating method for recycling the fly ash is characterized by comprising the following steps of:
the first step: after clean wet ash with the water content of 30-50% is dried, the fly ash component is analyzed by using on-line elemental analysis equipment, and when the fly ash component and the water meet the granulating condition at the same time, the fly ash is put into a batching machine for preparing batching;
And a second step of: two cases are included, each as follows;
Case one: weighing (2-10%) of organic binder and inorganic binder, and mixing with fly ash to obtain granulation raw material; conveying the granulation raw materials to a granulator for rolling granulation to obtain semi-finished fly ash particles with the particle size of 0.5-5 cm;
And a second case: conveying the fly ash raw materials in the proportioning machine to a granulator for rolling granulation to obtain fly ash primary particles, adding an organic binder and an inorganic binder with the mass ratio of (0.5-2%) (2-10%) into the fly ash primary particles, uniformly mixing, and enabling the organic binder and the inorganic binder to be wrapped on the surfaces of the fly ash particles to finally obtain semi-finished fly ash particles with the particle size of 0.5-5 cm;
And a third step of: and (3) drying the semi-finished fly ash particles, and conveying the dried semi-finished fly ash particles to a curing barn for curing to obtain finished fly ash particles.
2. The method for granulating a fly ash as claimed in claim 1, wherein in the first step, the clean wet ash is dried in a rotary kiln or a kiln.
3. The granulation method special for recycling fly ash according to claim 1, wherein the mass ratio of the fly ash to the total amount of the organic binder and the inorganic binder is (80-95): (5.5-12).
4. The granulation method for recycling of fly ash according to claim 1, wherein in the second step, a reducing agent is added to the organic binder and the inorganic binder at the same time, and the amount of the reducing agent is 1-2% of the total amount of the organic binder and the inorganic binder.
5. The method for granulating fly ash as claimed in claim 4, wherein the reducing agent is one or both of coke and carbon powder.
6. The method for granulating a fly ash as claimed in claim 1, wherein in the second step, the roll pressure of the granulator is 0.3 to 0.5MPa, and the semi-finished fly ash particles having a water content of 10 to 15% and a particle diameter of 0.5 to 3cm are obtained.
7. The method for granulating a fly ash as claimed in claim 1, wherein in the second step, the roll pressure of the granulator is 5 to 8MPa, and semi-finished fly ash particles having a water content of 3 to 5% and a particle diameter of 1 to 5cm are obtained.
8. The method for granulating fly ash as claimed in claim 1, wherein in the third step, the semi-finished fly ash particles are dried by a hot air dryer and then transported to a curing warehouse for curing for 1-2 days.
9. The special granulation method for recycling the fly ash according to claim 2, wherein the waste gas generated in the granulator, the drying furnace and the curing bin is filtered and purified by waste gas treatment equipment and is discharged after reaching standards; and the slag formed by stacking, stirring and transporting materials in the granulator, the drying furnace and the curing bin and the slag collected in the waste gas treatment equipment can be conveyed to the batching machine for recycling.
10. The special granulation method for recycling fly ash according to claim 1, wherein low-quality heat source can be used for meeting the heat required for drying and solidifying materials, and the heat source of the heat can be used for drying furnace waste gas, low-quality steam of a power plant, waste heat steam and hot air generated in the granulation method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311703239.0A CN117964269A (en) | 2023-12-12 | 2023-12-12 | Granulation method special for fly ash recycling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311703239.0A CN117964269A (en) | 2023-12-12 | 2023-12-12 | Granulation method special for fly ash recycling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117964269A true CN117964269A (en) | 2024-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311703239.0A Pending CN117964269A (en) | 2023-12-12 | 2023-12-12 | Granulation method special for fly ash recycling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117964269A (en) |
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2023
- 2023-12-12 CN CN202311703239.0A patent/CN117964269A/en active Pending
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