CN113562999A - Light ceramsite prepared from incineration fly ash of waste power plant and preparation method thereof - Google Patents
Light ceramsite prepared from incineration fly ash of waste power plant and preparation method thereof Download PDFInfo
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- CN113562999A CN113562999A CN202010352839.7A CN202010352839A CN113562999A CN 113562999 A CN113562999 A CN 113562999A CN 202010352839 A CN202010352839 A CN 202010352839A CN 113562999 A CN113562999 A CN 113562999A
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- fly ash
- incineration fly
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- incineration
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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
- 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
- C04B18/027—Lightweight materials
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The application discloses a light ceramsite prepared from incineration fly ash of a refuse power plant, which comprises the following raw materials of the incineration fly ash, bentonite, rice bran powder and the like, wherein the preparation method comprises the following steps of: mixing, ball milling, granulating, calcining and the like. The light ceramsite prepared by the method meets the requirements of LC25 light aggregate concrete and high-strength light aggregate with the density grade of 600 in GB/T17431-2010 light aggregate and test method thereof, and meanwhile, the preparation process is simple, the cost is low, and the utilization rate of incineration fly ash is high. The invention provides a way for effectively recycling the fly ash from the incineration of the municipal refuse while changing waste into valuable, reduces the environmental pollution, achieves the aim of saving resources and has good economic and social benefits.
Description
Technical Field
The invention relates to the field of preparation of building materials, in particular to light ceramsite prepared from incineration fly ash of a refuse power plant and a preparation method thereof.
Background
Along with the rapid development of economy, the urbanization level is gradually improved, a large amount of garbage is generated in cities every year, and the urban garbage incineration treatment has the advantages of sterility, obvious reduction and the like and is widely applied in order to effectively destroy corrosive substances and pathogenic microorganisms in the garbage and reduce the amount of the garbage. Solid residues generated after the incineration treatment of the garbage approximately account for 20-25% of the solid content of the garbage, wherein bottom slag accounts for 15-20%, and fly ash accounts for about 4-5%. The solid residue after incineration and fly ash are treated as another thought problem, the solid residue refers to residue generated by a fire grate system, and at present, slag is mostly used as an admixture of concrete, so that the manufacturing cost of the concrete can be reduced, and the pollution of the slag to the environment can be reduced. The fly ash is mainly produced from a flue gas purification system and a heat recovery system in an incineration system, and the fly ash is mainly treated at present in two categories, namely, the fly ash is taken as waste to be solidified or stabilized and then is buried, and the fly ash is recycled. The fly ash is used as waste to be solidified or stabilized and then is landfilled, so that the treatment cost is high, secondary pollution is easily caused, land resources are occupied, the fly ash cannot be reasonably treated, and more resource waste and cost investment are caused.
Chinese patent CN101905967B discloses a fly ash baked brick prepared by washing domestic garbage incineration fly ash water and a preparation method thereof. The fly ash baked brick consists of 25-35% of water-washed domestic waste incineration fly ash, 45-70% of clay and 5-20% of feldspar by mass. The preparation method comprises 7 steps of domestic garbage incineration fly ash washing treatment, pretreatment before material crushing, raw material aging, raw material molding, green body drying, brick sintering and the like. The patent has complex process and low utilization rate of the waste incineration fly ash.
Ceramsite is a lightweight aggregate produced by foaming in a rotary kiln. It has the features of spherical shape, smooth and hard surface, honeycomb inside, small density, high strength, etc. it may be used to replace common sandstone to prepare light aggregate concrete as water treating filter material, adsorbent, permeable pavement material, culture medium for soilless culture in agriculture and garden, bridge deck, hollow block and other building material.
Disclosure of Invention
The invention aims to provide light ceramsite prepared from incineration fly ash of a refuse power plant and a preparation method thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
a light ceramsite prepared by utilizing incineration fly ash of a refuse power plant is characterized by comprising the following material raw materials in percentage by mass:
50-60% of incineration fly ash
15-25% of fly ash
20-25% of bentonite
0 to 5 percent of rice bran powder
Further, the incineration fly ash is municipal waste incineration fly ash, the fly ash is fine ash collected from flue gas of a coal-fired power plant, and the rice bran powder is obtained by grinding the part of the rice without clean rice in the rice making process and sieving the part of the rice with a 100-mesh sieve.
The preparation method of the light ceramsite sequentially comprises the following steps:
s1 mixing: weighing a certain amount of incineration fly ash, bentonite and rice chaff, and putting into a forced stirring mixer for uniformly mixing;
s2 ball milling: ball milling the mixed material prepared in the step S1;
s3 granulation: conveying the ball-milling powder prepared in the step S2 to a disc spray granulator for granulation;
s4 calcination: and (5) putting the raw material balls prepared in the step (S3) into a rotary kiln for calcining to obtain the light ceramsite.
Preferably, in the method for preparing the light ceramsite by using the fly ash from the incineration of the refuse power plant, in the step S2, the material is ball-milled until the average particle size is less than or equal to 120 micrometers.
Preferably, in the method for preparing the light ceramsite by using the incineration fly ash of the refuse power plant, in the step S3, the water content of the raw material balls is controlled to be 16-20%, and the diameter of the raw material balls is controlled to be 4-16 mm.
Preferably, in the method for preparing the light ceramsite by using the incineration fly ash of the refuse power plant, in the step S4, the calcination temperature is 1180-1280 ℃.
Preferably, in the method for preparing the light ceramsite by using the incineration fly ash of the refuse power plant, in the step S4, the whole kiln time is 40-50 min, and the rotation speed of the kiln is 1.8-2.4 r/min.
Compared with the prior art, the invention adopts the incineration fly ash as the main material and the fly ash, the bentonite and the rice chaff as the auxiliary materials to prepare the light ceramsite, and the prepared light ceramsite meets the requirements of LC25 light aggregate concrete and high-strength light aggregate with the density grade of 600 in GB/T17431-. Meanwhile, the preparation process is simple, the cost is low, and the utilization rate of incineration fly ash is high. The invention provides a way for effectively recycling the fly ash from the incineration of the municipal refuse while changing waste into valuable, reduces the environmental pollution, achieves the aim of saving resources and has good economic and social benefits.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
A light ceramsite prepared from incineration fly ash of a refuse power plant comprises the following raw materials in percentage by mass:
52 percent of incineration fly ash
20 percent of fly ash
Bentonite 25%
Rice bran powder 3%
The preparation method of the light ceramsite sequentially comprises the following steps:
s1 mixing: weighing incineration fly ash, bentonite and rice chaff, putting into a forced stirring mixer, and uniformly mixing;
s2 ball milling: ball-milling the mixed material prepared in the step S1 until the average particle size is 110 microns;
s3 granulation: conveying the ball-milling powder prepared in the step S2 to a disc spray granulator for granulation, and controlling the water content of raw material balls to be 18% and the diameter to be 4-16 mm;
s4 calcination: and (4) putting the raw material balls prepared in the step (S3) into a rotary kiln for calcination, wherein the calcination temperature is 1220 ℃, the whole kiln time is 48min, and the rotation speed of the kiln is 1.9 r/min, so that the light ceramsite is obtained.
Example 2
A light ceramsite prepared from incineration fly ash of a refuse power plant comprises the following raw materials in percentage by mass:
54 percent of incineration fly ash
22 percent of fly ash
Bentonite 22%
2 percent of rice bran powder
The preparation method of the light ceramsite sequentially comprises the following steps:
s1 mixing: weighing incineration fly ash, bentonite and rice chaff, putting into a forced stirring mixer, and uniformly mixing;
s2 ball milling: ball-milling the mixed material prepared in the step S1 until the average particle size is 100 microns;
s3 granulation: conveying the ball-milling powder prepared in the step S2 to a disc spray granulator for granulation, and controlling the water content of raw material balls to be 19% and the diameter to be 4-16 mm;
s4 calcination: and (4) putting the raw material balls prepared in the step (S3) into a rotary kiln for calcination, wherein the calcination temperature is 1240 ℃, the whole kiln time is 45min, and the rotation speed of the kiln is 2.0 r/min, so that the light ceramsite is obtained.
Example 3
A light ceramsite prepared from incineration fly ash of a refuse power plant comprises the following raw materials in percentage by mass:
56 percent of incineration fly ash
18 percent of fly ash
23 percent of bentonite
Rice bran powder 3%
The preparation method of the light ceramsite sequentially comprises the following steps:
s1 mixing: weighing incineration fly ash, bentonite and rice chaff, putting into a forced stirring mixer, and uniformly mixing;
s2 ball milling: ball-milling the mixed material prepared in the step S1 until the average particle size is 100 microns;
s3 granulation: conveying the ball-milling powder prepared in the step S2 to a disc spray granulator for granulation, and controlling the water content of raw material balls to be 20% and the diameter to be 4-16 mm;
s4 calcination: and (4) putting the raw material balls prepared in the step (S3) into a rotary kiln for calcination, wherein the calcination temperature is 1260 ℃, the whole kiln time is 46min, and the rotation speed of the kiln is 2.3 r/min, so that the light ceramsite is obtained.
Example 4
A light ceramsite prepared from incineration fly ash of a refuse power plant comprises the following raw materials in percentage by mass:
58 percent of incineration fly ash
18 percent of fly ash
20 percent of bentonite
Rice bran powder 4%
The preparation method of the light ceramsite sequentially comprises the following steps:
s1 mixing: weighing incineration fly ash, bentonite and rice chaff, putting into a forced stirring mixer, and uniformly mixing;
s2 ball milling: ball-milling the mixed material prepared in the step S1 until the average particle size is 100 microns;
s3 granulation: conveying the ball-milling powder prepared in the step S2 to a disc spray granulator for granulation, and controlling the water content of raw material balls to be 18% and the diameter to be 4-16 mm;
s4 calcination: and (4) putting the raw material balls prepared in the step (S3) into a rotary kiln for calcination, wherein the calcination temperature is 1280 ℃, the whole kiln time is 43min, and the rotation speed of the kiln is 2.2 r/min, so that the light ceramsite is obtained.
The performance indexes of the light ceramsite prepared in the above embodiments are detected by referring to GB/T17431-:
as can be seen from the table, the prepared lightweight ceramsite has good quality, and meets the requirements of LC25 lightweight aggregate concrete and high-strength lightweight aggregate with the density grade of 600 in GB/T17431-2010 lightweight aggregate and test method thereof.
The present embodiments are to be considered as illustrative and not restrictive, and the scope of the patent is to be determined by the appended claims.
Claims (4)
1. A light ceramsite prepared from incineration fly ash of a refuse power plant is characterized by comprising the following raw materials in percentage by mass:
50-60% of incineration fly ash
15-25% of fly ash
20-25% of bentonite
0-5% of rice bran powder.
2. The preparation method for preparing the light ceramsite of claim 1 sequentially comprises the following steps:
s1 mixing: weighing a certain amount of incineration fly ash, bentonite and rice chaff, and putting into a forced stirring mixer for uniformly mixing;
s2 ball milling: ball milling the mixed material prepared in the step S1;
s3 granulation: conveying the ball-milling powder prepared in the step S2 to a disc spray granulator for granulation;
s4 calcination: and (5) putting the raw material balls prepared in the step (S3) into a rotary kiln for calcining to obtain the light ceramsite.
3. The method for preparing light-weight ceramsite according to claim 2, wherein in step S2, the materials are ball-milled until the average particle size is less than or equal to 120 μm.
4. The method for preparing light-weight ceramsite according to claim 2, wherein in the step S4, the calcination temperature is 1180-1280 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010352839.7A CN113562999A (en) | 2020-04-29 | 2020-04-29 | Light ceramsite prepared from incineration fly ash of waste power plant and preparation method thereof |
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| CN202010352839.7A CN113562999A (en) | 2020-04-29 | 2020-04-29 | Light ceramsite prepared from incineration fly ash of waste power plant and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195417A (en) * | 2021-11-02 | 2022-03-18 | 南京钜力智能制造技术研究院有限公司 | Fly ash solidified light aggregate production process and production device thereof |
| CN114920523A (en) * | 2022-06-17 | 2022-08-19 | 太原理工大学 | Composite particle capable of adsorbing carbon dioxide and preparation method thereof |
| CN114956785A (en) * | 2022-06-29 | 2022-08-30 | 山东恒远利废技术股份有限公司 | Method for treating waste incineration fly ash and preparing high-strength ceramsite |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1830885A (en) * | 2006-03-20 | 2006-09-13 | 天津泰达环保有限公司 | Ceramicite using ash from incineration of refuse as raw material and its prodn. method |
| CN109400108A (en) * | 2018-11-06 | 2019-03-01 | 海安南京大学高新技术研究院 | A kind of preparation method of light, and high-strength fly-ash haydite |
-
2020
- 2020-04-29 CN CN202010352839.7A patent/CN113562999A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1830885A (en) * | 2006-03-20 | 2006-09-13 | 天津泰达环保有限公司 | Ceramicite using ash from incineration of refuse as raw material and its prodn. method |
| CN109400108A (en) * | 2018-11-06 | 2019-03-01 | 海安南京大学高新技术研究院 | A kind of preparation method of light, and high-strength fly-ash haydite |
Non-Patent Citations (1)
| Title |
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| 国土资源部信息中心: "《世界矿产资源年评 2013》", 31 October 2013, 地质出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195417A (en) * | 2021-11-02 | 2022-03-18 | 南京钜力智能制造技术研究院有限公司 | Fly ash solidified light aggregate production process and production device thereof |
| CN114920523A (en) * | 2022-06-17 | 2022-08-19 | 太原理工大学 | Composite particle capable of adsorbing carbon dioxide and preparation method thereof |
| CN114956785A (en) * | 2022-06-29 | 2022-08-30 | 山东恒远利废技术股份有限公司 | Method for treating waste incineration fly ash and preparing high-strength ceramsite |
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