CN104108946A - Garbage incineration fly ash -based foamed ceramic and preparation method thereof - Google Patents
Garbage incineration fly ash -based foamed ceramic and preparation method thereof Download PDFInfo
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- CN104108946A CN104108946A CN201410170959.XA CN201410170959A CN104108946A CN 104108946 A CN104108946 A CN 104108946A CN 201410170959 A CN201410170959 A CN 201410170959A CN 104108946 A CN104108946 A CN 104108946A
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- incineration
- foamed ceramics
- refuse flyash
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Abstract
The invention relates to a garbage incineration fly ash-based foamed ceramic and a preparation method thereof. Raw materials for preparing the foamed ceramic comprise 10-59.1wt% of garbage incineration fly ash, 34.5-60wt% of quartz sand and 6.4-38wt% of an additive. The preparation method of the foamed ceramic comprises the following steps: 1, powdery blank material preparation: adding the raw materials for preparing the foamed ceramic and water into a ball mill, ball-milling for 6-10h to obtain a uniformly mixed slurry, drying the slurry to obtain a powdery blank material, and preparing the raw materials comprising 10-59.1wt% of the garbage incineration fly ash, 34.5-60wt% of quartz sand and 6.4-38wt% of the additive; and 2, sintering: adding the powdery blank material prepared in step 1 into a die, putting the die with the powdery blank material in a high temperature furnace, and sintering to obtain the foamed ceramic. The garbage incineration solid waste fly ash is recycled in the invention, so the environmental pressure is effectively alleviated.
Description
Technical field
The invention belongs to Solid Waste Treatment and Resources and utilize technical field, relate to a kind of incineration of refuse flyash base foamed ceramics and preparation method thereof.
Background technology
Consideration of MSW Incineration Technology has become the developing direction of domestic domestic garbage was harmlessly treated because of its minimizing, resource utilization, innoxious degree height.According to measuring and calculating, to the end of the year 2015, national incineration treatment of garbage ability approaches 270,000 ton per days, meanwhile produces every year the incineration of refuse flyash of millions of tons, and a year processing costs will reach 2,400,000,000 yuan.Incineration of refuse flyash is the tiny dust arriving at flue gas purification system and pick up the heat systematic collection after consumer waste incineration, and the content of its heavy metal is higher and have a certain amount of dioxin, is typical danger wastes.At present incineration of refuse flyash is disposed approach and is mainly concentrated on after the restriction that makes the stripping concentration of heavy metal in cured body reach landfill yard by solidifying requires and carry out landfill.Curing means mainly comprise that cement solidification, chemical agent solidify, high-temperature fusion is solidified, wherein optimum with high-temperature fusion solidification effect, formed glass solidified body has good permanent stability, can realize the effective decomposition to the permanent curing and dioxin of heavy metal ion.But high-temperature fusion curing technology because of energy-output ratio large, running cost is high and be difficult to apply.If can realize the recycling of incineration of refuse flyash under hot conditions, can realize the harmlessness disposing of incineration of refuse flyash, can avoid again the waste of energy resource.At present, the recycling of incineration of refuse flyash under high temperature has also been done to some researchs both at home and abroad.
The method > > of a patent of invention CN101817650A < < treating incinerated fly ash of domestic garbage with cooperation of cement kiln discloses a kind of method using incineration of refuse flyash as cement slurry Substitute For Partial Raw Material for Cement Production.The cement that adopts the method to produce meets the performance index of P.O42.5 class g cement completely, realized the comprehensive utilization of resources of incineration of refuse flyash, but in the method, flying dust need to be through washing pre-treatment, comprise the comparatively loaded down with trivial details techniques such as washing, dehydration and oven dry, and need set up the equipment such as washings purification, enlarge markedly the processing cost of incineration of refuse flyash, reached approximately 1580 yuan/ton.
Summary of the invention
Technical problem to be solved by this invention is for above shortcomings in prior art, a kind of incineration of refuse flyash base foamed ceramics and preparation method thereof is provided, the method can make full use of the solid waste flying dust that waste incineration produces, greatly alleviated environmental stress, and the good (unit weight≤225g/cm of incineration of refuse flyash base foamed ceramics performance of preparation
3, ultimate compression strength>=0.74MPa, thermal conductivity≤0.083W/ (mk), water-intake rate≤2.67%).
The technical scheme of incineration of refuse flyash base foamed ceramics of the present invention is:
Its starting material are comprised of the material component of following weight content: incineration of refuse flyash 10～59.1%, quartz sand 34.5～60%, additive 6.4～38%.
Press such scheme, described additive comprises the material component of following weight content: aluminum oxide 47.10～76.56%, and ferric oxide 0～26.45%, sodium carbonate 0～28.70%, whipping agent 2.07～23.44%, the weight sum of above material is 100%.
Preferably, described whipping agent is silicon carbide.
Press such scheme, the granularity of described each component of starting material is less than 200 orders.
Press such scheme, described foamed ceramics unit weight≤225g/cm
3, ultimate compression strength>=0.74MPa, thermal conductivity≤0.083W/ (mk), water-intake rate≤2.67%.
The preparation method of incineration of refuse flyash base foamed ceramics of the present invention comprises the following steps:
(1) prepare powder blank: starting material and the water of preparing foamed ceramics are put into ball mill ball milling 6～10h, and the slip that obtains mixing, then dries slip, obtains powder blank; The weight proportion of preparing each component of starting material of foamed ceramics is: incineration of refuse flyash 10～59.1%, quartz sand 34.5～60%, additive 6.4～38%;
(2) sintering: step (1) gained powder blank is inserted in mould, and put into High Temperature Furnaces Heating Apparatus sintering, obtain foamed ceramics.
Press such scheme, the described ball milling of step (1) is to using aluminum oxide abrading-ball as grinding medium, and wherein the mass ratio of abrading-ball, starting material, water is 2～3:1:0.4.
Press such scheme, sintering condition is that temperature rise rate with 4～6 ℃/min is raised to 1130～1200 ℃ from room temperature, insulation 1h, then furnace cooling in the described High Temperature Furnaces Heating Apparatus of step (2).
Beneficial effect of the present invention is: 1, the main tupe of incineration of refuse flyash is first to solidify rear landfill at present, not only takies a large amount of land resources, and have the hidden danger such as groundwater pollution after solidify & bury, from root, does not remove the harm of flying dust.The solid waste flying dust that waste incineration was produced of take is basic material, has saved ore resource on the one hand, has reduced the production cost of foamed ceramics, has realized on the other hand the recycling of danger wastes flying dust; 2, incineration of refuse flyash belongs to CaO-SiO
2-Al
2o
3system, similar to the main chemical compositions of foamed ceramics.With incineration of refuse flyash, prepare the chemical constitution characteristic that foamed ceramics takes full advantage of it, SiO
2, Al
2o
3as foamed ceramics main chemical compositions, in incineration of refuse flyash, also contain a small amount of CaO, K
2o, Fe
2o
3, Na
2o can be used as fusing assistant, has realized the rationalization utilization of resources of incineration of refuse flyash; 3, incineration of refuse flyash has certain pozzolanic activity, can reduce firing temperature, thereby reduce the pollution on the environments such as volatilization of heavy metal ion, and prepared foamed ceramics compact structure, effectively reduce the stripping of the objectionable impuritiess such as heavy metal ion, realized the harmlessness disposing of incineration of refuse flyash; 4, the method for the invention preparation technology is simple, prepared foamed ceramics excellent property, and internal porosity aperture is even, and the low (≤225g/cm of unit weight
3), intensity high (>=0.74MPa), thermal conductivity low (≤0.083W/ (mk)), water-intake rate low (≤2.67%).
Embodiment
For making those skilled in the art understand better technical scheme of the present invention, below in conjunction with embodiment, the present invention is described in further detail.
In embodiment, the testing method of the stripping index of the performance of prepared foamed ceramics and heavy metal ion is as follows: the testing method of foamed ceramics water-intake rate is with reference to the mensuration > > (GB/T8810-2005) of < < rigid foam water-intake rate, the testing method of ultimate compression strength is with reference to < < foamed ceramics insulating product > > (JC/T647-2005), the testing method of thermal conductivity is with reference to mensuration-protective heat plate method > > (GB/T10294-2008) of < < Technology of Steady State Thermal Resistance of Thermal Insulating Material and related characteristics, the testing method of unit weight is with reference to < < Porosity of Porous Ceramics, unit weight test method > > (GB/T1966-1996), the leaching method of heavy metal ion is with reference to < < solid waste-Leaching leaching method-sulfuric acid nitrate method > > (HJ/T299-2007).
The particle diameter of embodiment of the present invention raw materials is all less than 200 orders.
Embodiment 1
Foamed ceramics starting material component and mass ratio: incineration of refuse flyash 10wt%, quartz sand 52wt%, additive 38wt% (comprising 52.64wt% aluminum oxide, 21.05wt% ferric oxide, 21.05wt% sodium carbonate, 5.26wt% silicon carbide).
By proportioning, in above-mentioned starting material, add the water that accounts for starting material total mass 40%, using aluminum oxide abrading-ball as grinding medium, ball milling 8h (abrading-ball on ball mill, starting material, the mass ratio of water is 2:1:0.4), the slurry that obtains mixing, slurry is placed in air dry oven and is dried, dry the temperature inside the box is 105 ℃, make powder blank, powder blank packed in the refractory-material dies that scribbles aluminum oxide and send in High Temperature Furnaces Heating Apparatus, body of heater is raised to 1200 ℃ according to the temperature rise rate of 5 ℃/min from room temperature, insulation 1h, after furnace cooling, cutting obtains incineration of refuse flyash base foamed ceramics.
The stripping index of the performance of prepared foamed ceramics and heavy metal ion is as shown in table 1 below:
The stripping concentration of the performance of table 1 foamed ceramics and heavy metal ion
Embodiment 2
Foamed ceramics starting material component and mass ratio: incineration of refuse flyash 15.8wt%, quartz sand 60wt%, additive 24.2wt% (comprising 47.10wt% aluminum oxide, 26.45wt% ferric oxide, 24.38wt% sodium carbonate, 2.07wt% silicon carbide).
By proportioning, in above-mentioned starting material, add the water that accounts for starting material total mass 40%, using aluminum oxide abrading-ball as grinding medium, ball milling 8h (abrading-ball on ball mill, starting material, the mass ratio of water is 3:1:0.4), the slurry that obtains mixing, slurry is placed in air dry oven and is dried, dry the temperature inside the box is 105 ℃, make powder blank, powder blank packed in the refractory-material dies that scribbles aluminum oxide and send in High Temperature Furnaces Heating Apparatus, body of heater is raised to 1190 ℃ according to the temperature rise rate of 6 ℃/min from room temperature, insulation 1h, after furnace cooling, cutting obtains incineration of refuse flyash base foamed ceramics.
The stripping index of the performance of prepared foamed ceramics and heavy metal ion is as shown in table 2 below:
The stripping concentration of the performance of table 2 foamed ceramics and heavy metal ion
Embodiment 3
Foamed ceramics starting material component and mass ratio: incineration of refuse flyash 31.2wt%, quartz sand 46.5wt%, additive 22.3wt% (comprising 54.26wt% aluminum oxide, 12.56wt% ferric oxide, 28.70wt% sodium carbonate, 4.48wt% silicon carbide).
By proportioning, in above-mentioned starting material, add the water that accounts for starting material total mass 40%, using aluminum oxide abrading-ball as grinding medium, ball milling 8h (abrading-ball on ball mill, starting material, the mass ratio of water is 2:1:0.4), the slurry that obtains mixing, slurry is placed in air dry oven and is dried, dry the temperature inside the box is 110 ℃, make powder blank, powder blank packed in the refractory-material dies that scribbles aluminum oxide and send in High Temperature Furnaces Heating Apparatus, body of heater is raised to 1160 ℃ according to the temperature rise rate of 4 ℃/min from room temperature, insulation 1h, after furnace cooling, cutting obtains incineration of refuse flyash base foamed ceramics.
The stripping index of the performance of prepared foamed ceramics and heavy metal ion is as shown in table 3 below:
The stripping concentration of the performance of table 3 foamed ceramics and heavy metal ion
Embodiment 4
Foamed ceramics starting material component and mass ratio: incineration of refuse flyash 59.1wt%, quartzy 34.5wt%, additive 6.4wt% (comprising 76.56wt% aluminum oxide, 23.44wt% silicon carbide).By proportioning, in above-mentioned starting material, add the water that accounts for starting material total mass 40%, using aluminum oxide abrading-ball as grinding medium, ball milling 8h (abrading-ball on ball mill, starting material, the mass ratio of water is 2:1:0.4), the slurry that obtains mixing, slurry is placed in air dry oven and is dried, dry the temperature inside the box is 105 ℃, make powder blank, powder blank packed in the refractory-material dies that scribbles aluminum oxide and send in High Temperature Furnaces Heating Apparatus, body of heater is raised to 1130 ℃ according to the temperature rise rate of 5 ℃/min from room temperature, insulation 1h, after furnace cooling, cutting obtains incineration of refuse flyash base foamed ceramics.
The stripping index of the performance of prepared foamed ceramics and heavy metal ion is as shown in table 4 below:
The stripping concentration of the performance of table 4 foamed ceramics and heavy metal ion
Functional and the heavy metal ion stripping concentration of incineration of refuse flyash base foamed ceramics provided by the invention, far below the limit value requirement of < < Hazardous wastes judging standard-leaching characteristic identification > > (GB5085.3-2007), has realized the resource utilization of flying dust effectively as seen from the above embodiment.
Claims (8)
1. an incineration of refuse flyash base foamed ceramics, the starting material that it is characterized in that preparing this foamed ceramics are comprised of the material component of following weight content: incineration of refuse flyash 10～59.1%, quartz sand 34.5～60%, additive 6.4～38%.
2. incineration of refuse flyash base foamed ceramics according to claim 1, it is characterized in that described additive comprises the material component of following weight content: aluminum oxide 47.10～76.56%, ferric oxide 0～26.45%, sodium carbonate 0～28.70%, whipping agent 2.07～23.44%, the weight sum of above material is 100%.
3. incineration of refuse flyash base foamed ceramics according to claim 2, is characterized in that described whipping agent is silicon carbide.
4. incineration of refuse flyash base foamed ceramics according to claim 1, is characterized in that the granularity of described each component of starting material is less than 200 orders.
5. according to the arbitrary described incineration of refuse flyash base foamed ceramics of claim 1-2, it is characterized in that described foamed ceramics unit weight≤225g/cm
3, ultimate compression strength>=0.74MPa, thermal conductivity≤0.083W/ (mk), water-intake rate≤2.67%.
6. a preparation method for incineration of refuse flyash base foamed ceramics, is characterized in that comprising the following steps:
(1) prepare powder blank: starting material and the water of preparing foamed ceramics are put into ball mill ball milling 6～10h, and the slip that obtains mixing, then dries slip, obtains powder blank; The weight proportion of preparing each component of starting material of foamed ceramics is: incineration of refuse flyash 10～59.1%, quartz sand 34.5～60%, additive 6.4～38%;
(2) sintering: step (1) gained powder blank is inserted in mould, and put into High Temperature Furnaces Heating Apparatus sintering, obtain foamed ceramics.
7. the preparation method of incineration of refuse flyash base foamed ceramics according to claim 6, is characterized in that the described ball milling of step (1) is to using aluminum oxide abrading-ball as grinding medium, and wherein the mass ratio of abrading-ball, starting material, water is 2～3:1:0.4.
8. the preparation method of incineration of refuse flyash base foamed ceramics according to claim 6, it is characterized in that sintering condition in the described High Temperature Furnaces Heating Apparatus of step (2) is that temperature rise rate with 4～6 ℃/min is raised to 1130～1200 ℃ from room temperature, insulation 1h, then furnace cooling.
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Cited By (9)
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|---|---|---|---|---|
| CN104496535A (en) * | 2015-01-04 | 2015-04-08 | 中南大学 | Foamed ceramic mainly prepared from silica sand tailing and fly ash and preparation method thereof |
| CN107434429A (en) * | 2017-08-25 | 2017-12-05 | 中国科学院城市环境研究所 | A kind of method and its equipment that foamed ceramics is prepared using pyrolyzing sludge residue |
| CN110683832A (en) * | 2019-10-28 | 2020-01-14 | 北京科技大学 | Foamed ceramic prepared from waste incineration fly ash and preparation method thereof |
| CN110937917A (en) * | 2019-12-31 | 2020-03-31 | 欧亚华都(宜兴)环保有限公司 | Wall material using fly ash as raw material and preparation method thereof |
| CN111004051A (en) * | 2019-12-31 | 2020-04-14 | 欧亚华都(宜兴)环保有限公司 | Method for sintering porous ceramic by doping waste incineration fly ash into waste ceramic |
| CN113402257A (en) * | 2021-06-21 | 2021-09-17 | 湖南国发控股有限公司 | Formula and method for producing foamed ceramic by taking waste incineration fly ash as main body |
| CN113548802A (en) * | 2020-04-24 | 2021-10-26 | 海安南京大学高新技术研究院 | Method for preparing foam glass ceramics by utilizing garbage fly ash |
| CN113617806A (en) * | 2021-08-20 | 2021-11-09 | 北科蕴宏环保科技(北京)有限公司 | Novel system and method for removing dioxin in waste incineration fly ash |
| CN116462529A (en) * | 2023-04-28 | 2023-07-21 | 南京工业大学 | Method for preparing silicon carbide film support body from active coke fly ash |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104496535A (en) * | 2015-01-04 | 2015-04-08 | 中南大学 | Foamed ceramic mainly prepared from silica sand tailing and fly ash and preparation method thereof |
| CN107434429A (en) * | 2017-08-25 | 2017-12-05 | 中国科学院城市环境研究所 | A kind of method and its equipment that foamed ceramics is prepared using pyrolyzing sludge residue |
| CN110683832A (en) * | 2019-10-28 | 2020-01-14 | 北京科技大学 | Foamed ceramic prepared from waste incineration fly ash and preparation method thereof |
| CN110937917A (en) * | 2019-12-31 | 2020-03-31 | 欧亚华都(宜兴)环保有限公司 | Wall material using fly ash as raw material and preparation method thereof |
| CN111004051A (en) * | 2019-12-31 | 2020-04-14 | 欧亚华都(宜兴)环保有限公司 | Method for sintering porous ceramic by doping waste incineration fly ash into waste ceramic |
| CN113548802A (en) * | 2020-04-24 | 2021-10-26 | 海安南京大学高新技术研究院 | Method for preparing foam glass ceramics by utilizing garbage fly ash |
| CN113548802B (en) * | 2020-04-24 | 2023-12-29 | 海安南京大学高新技术研究院 | Method for preparing foam glass ceramics by utilizing garbage fly ash |
| CN113402257A (en) * | 2021-06-21 | 2021-09-17 | 湖南国发控股有限公司 | Formula and method for producing foamed ceramic by taking waste incineration fly ash as main body |
| CN113617806A (en) * | 2021-08-20 | 2021-11-09 | 北科蕴宏环保科技(北京)有限公司 | Novel system and method for removing dioxin in waste incineration fly ash |
| CN116462529A (en) * | 2023-04-28 | 2023-07-21 | 南京工业大学 | Method for preparing silicon carbide film support body from active coke fly ash |
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| CN104108946B (en) | 2016-01-06 |
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Effective date of registration: 20171218 Address after: 046000 North First Ring Road No. 9, Changzhi City, Shanxi Patentee after: Changzhi martial arts and Engineering Technology Research Institute Address before: 430070 Hubei Province, Wuhan city Hongshan District Luoshi Road No. 122 Patentee before: Wuhan University of Technology |