CN104003637A - Method of preparing building material products by carbonating municipal waste incineration ash - Google Patents
Method of preparing building material products by carbonating municipal waste incineration ash Download PDFInfo
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- CN104003637A CN104003637A CN201410235920.1A CN201410235920A CN104003637A CN 104003637 A CN104003637 A CN 104003637A CN 201410235920 A CN201410235920 A CN 201410235920A CN 104003637 A CN104003637 A CN 104003637A
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- carbonating
- incineration ash
- waste incineration
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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
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Abstract
The invention belongs to the technical field of hazardous waste curing process and building materials and discloses a method of preparing building material products by carbonating municipal waste incineration ash. The method comprises the following steps: uniformly stirring municipal waste incineration ash and water; compressing size and shape controllable building material prefabricated blanks; and then, carbonating the blanks to obtain the building material products. The municipal waste incineration ash is bottom residues and/or fly ash, the water accounts of 3-30% of the municipal waste incineration ash. The carbonating treatment condition is as follows: the gas pressure is greater than 1bar, the CO2 concentration is not less than 15%, the carbonating treatment temperature is 15-150 DEG C, and the treatment time is not shorter than 0.5 hour. According to the method provided by the invention, dissolution of heavy metals such as Pb, Cr, Cd, Cu and Ni in the municipal waste incineration ash can be reduced, so that the environmental pollution is reduced. The industrial waste steel slag is utilized to absorb CO2, the greenhouse effect is alleviated, and the building material products which meet the industrial standard can be prepared, so that the method achieves multiple purposes by one thing.
Description
Technical field
The invention belongs to danger wastes solidification treatment and building material technical field, particularly a kind of carbonating city garbage burning ash is prepared the method for plastics products for building.
Background technology
Along with the development of urbanization process and human substance life horizontal's raising, the quantity of domestic waste also sharply increases.Domestic waste has become problem demanding prompt solution, and at present, the treatment process of domestic waste mainly contains sanitary landfill method, biological treatment, burning method etc.Burning method is with its unique advantage, as little in burned floor space, and the volume after burning can reduce up to 90%, can also sterilize simultaneously, decomposes some organism and has obtained development rapidly.But rubbish can produce two class solid residues in the process of burning: bottom ash and flying dust, contain a large amount of CO in tail gas
2(volume fraction is about 12%).In bottom ash, comprise slag, metal, vitreum and some incombustible organism etc., normal conditions are landfills or continue to use as material of construction after several weeks of weathering.In flying dust, contain a large amount of lime, () ， dioxin, the soluble salt such as cadmium, lead, zinc, chlorion etc. directly carry out can causing serious harm to soil, environment, human health after the stripping of landfill objectionable constituent heavy metal.
Patent CN201110032473.6 has proposed to utilize slag micropowder, water glass, and Sodium Silicofluorides etc. are as solidifying agent consolidating heavy metal, then incinerator ash is turned round and look to the clean grinds of carrying, and add secondary consolidation heavy metal cycle 27-29 days in asphalt to.Patent CN201310049944.3 mixes incineration of refuse flyash with the incineration of refuse flyash solidifying agent and the water that contain light calcined magnesia, then liquid-solid mixture is cured, and curing cycle is for being 3-7 days.The incinerator ash metallurgy sintering treatment fixing agent treatment cycle that patent CN200910103371.1 relates to is 3-7 days.Gained cured body is carried out landfill by the method that above-mentioned patent relates to, and can not realize the recycling of incinerator ash, and complex treatment process treatment cycle is longer.The incinerator ash that patent CN201210062261.7 is 85%-98% by mass percent and the metakaolin of 2-15% evenly mix, adding solid addition is the alkaline solution that material gross weight 1%-10%, water cement ratio are 0.2-0.45, continue stirring, moulding, microwave exposure 1-5 minute, then sprinkles water maintenance 3-5 days to finished product after natural curing 2-3 days.Patent CN201310018538.0 provides a kind of preparation method of the composite light brick that utilizes urban household garbage incineration residue manufacture, mix to adding cement, pearlstone, additive and filler in burning city domestic garbage bottom ash, the mass percent of this mixture is: burning city domestic garbage bottom ash 60-80%, cement 5-10%, pearlstone 5-10%, additive 2.1-5%, filler 2-20%.To state mixture and add water and stir, be added to block forming system, then separate and finished product palletizing system is made finished product composite light brick through steam hydrothermal curing system, plate.Complicated process of preparation.
The high alkalinity of bottom ash and flying dust is given their good carbonating performances, and carbonating is processed dust can improve its physics, and the characteristics such as chemistry, especially can improve the wherein stability of heavy metal, reduce stripping.Adopt carbonation process treating refuse burning ash can reduce Pb on the one hand, Cr, the stripping of the heavy metals such as Cd, is conducive to the second stage employ of incinerator ash; On the other hand can fixation of C O
2alleviate the Greenhouse effect that it causes, also can prepare the building material made that meets industry standard simultaneously.Therefore the present invention proposes one simple to operate, economy, environmental protection, effectively city garbage burning ash treatment technology.
Summary of the invention
In order to address the above problem, the invention provides a kind of method that carbonating city garbage burning ash is prepared plastics products for building.
The invention provides a kind of carbonating city garbage burning ash and prepare the method for plastics products for building, concrete technical scheme is as follows:
City garbage burning ash is stirred with water, be pressed into the controlled material of construction preform blank of size and shape, then it is carried out to carbonating processing, obtain plastics products for building.
Described city garbage burning ash is end slag and/or flying dust.
Described water accounts for the 3%-30% of city garbage burning ash quality.
Described compression moulding pressure is 2-30MPa.
The treatment condition of carbonating: gaseous tension is greater than 1bar, CO
2concentration in reaction system is not less than 15%, and carbonating treatment temp is to process and be not less than 0.5 hour at 15-150 DEG C.
The quality of described slag accounts for the 5%-90% of city garbage burning ash and slag total mass.
The CO using in described carbonating treating processes
2derive from industrial tail gas.
The invention has the beneficial effects as follows: be wrapped in incinerator ash particle surface by forming calcium carbonate crystal, and filling pore makes carbonating product after treatment finer and close, the present invention can reduce Pb in city garbage burning ash, Cr, Cd, Cu, the stripping of the heavy metals such as Ni, reduce the pollution to environment, utilize trade waste slag, absorb CO
2, alleviate Greenhouse effect, can prepare the building material made that meets industry standard simultaneously, achieve many things at one stroke.The technical process of the present invention's application is simple, and cost is low, can utilize city garbage burning ash simultaneously, slag, greenhouse gases CO
2, environmental protection.
Embodiment
To further illustrate the specific embodiment of the present invention by technical scheme below.
Embodiment 1
Choose domestic garbage incineration flyash slag in mass ratio 8:2 evenly mix, add appropriate water (water-solid ratio 0.20), under 10MPa pressure, be pressed into the brick of 240mm × 120mm × 55mm, in carbonation reaction still, react CO in reactor 3 hours
2concentration is 99.5%.Carbonating rate of body weight gain, goods ultimate compression strength and (HJ/T299-2007) carry out leaching toxicity test by " solid waste Leaching leaching method sulfuric acid nitrate method ", adopt the heavy metal content in atom spectrophotometry leach liquor, the results are shown in Table 1.
Embodiment 2
Choose domestic garbage incineration flyash and slag in mass ratio 7:3 evenly mix, add appropriate water (water-solid ratio 0.18), under 8MPa pressure, be pressed into the brick of 240mm × 120mm × 55mm, in carbonation reaction still, react CO in reactor 6 hours
2concentration is 50%.Carbonating rate of body weight gain, goods ultimate compression strength and (HJ/T299-2007) carry out leaching toxicity test by " solid waste Leaching leaching method sulfuric acid nitrate method ", adopt the heavy metal content in atom spectrophotometry leach liquor, the results are shown in Table 1.
Embodiment 3
The slag of choosing domestic garbage incineration flyash and Dalian special steel company limited in mass ratio 6:4 evenly mixes, add appropriate water (water-solid ratio 0.16), under 8MPa pressure, be pressed into the brick of 240mm × 120mm × 55mm, in carbonation reaction still, react CO in reactor 8 hours
2concentration is 25%.Carbonating rate of body weight gain, goods ultimate compression strength and (HJ/T299-2007) carry out leaching toxicity test by " solid waste Leaching leaching method sulfuric acid nitrate method ", adopt the heavy metal content in atom spectrophotometry leach liquor, the results are shown in Table 1.
Embodiment 4
Choose at the bottom of consumer waste incineration slag and slag in mass ratio 6:4 evenly mix, add appropriate water (water-solid ratio 0.15), under 8MPa pressure, be pressed into the brick of 240mm × 120mm × 55mm, in carbonation reaction still, react CO in reactor 15 hours
2concentration is 25%.Carbonating rate of body weight gain, goods ultimate compression strength and (HJ/T299-2007) carry out leaching toxicity test by " solid waste Leaching leaching method sulfuric acid nitrate method ", adopt the heavy metal content in atom spectrophotometry leach liquor, the results are shown in Table 1.
Embodiment 5
Choose at the bottom of consumer waste incineration slag and slag in mass ratio 4:6 evenly mix, add appropriate water (water-solid ratio 0.05), under 8MPa pressure, be pressed into the brick of 240mm × 120mm × 55mm, in carbonation reaction still, react CO in reactor 6 hours
2concentration is 10%.Carbonating rate of body weight gain, goods ultimate compression strength and (HJ/T299-2007) carry out leaching toxicity test by " solid waste Leaching leaching method sulfuric acid nitrate method ", adopt the heavy metal content in atom spectrophotometry leach liquor, the results are shown in Table 1.
Embodiment 6
Choose at the bottom of consumer waste incineration slag and slag in mass ratio 2:8 evenly mix, add appropriate water (water-solid ratio 0.15), under 15MPa pressure, be pressed into the brick of 240mm × 120mm × 55mm, in carbonation reaction still, react CO in reactor 2 hours
2concentration is 50%.Carbonating rate of body weight gain, goods ultimate compression strength and (HJ/T299-2007) carry out leaching toxicity test by " solid waste Leaching leaching method sulfuric acid nitrate method ", adopt the heavy metal content in atom spectrophotometry leach liquor, the results are shown in Table 1.
Embodiment 7
Choose slag at the bottom of consumer waste incineration, flying dust and slag in mass ratio 2:2:6 evenly mix, and add appropriate water (water-solid ratio 0.15), are pressed into the brick of 240mm × 120mm × 55mm under 8MPa pressure, in carbonation reaction still, react CO in reactor 12 hours
2concentration is 25%.Carbonating rate of body weight gain, goods ultimate compression strength and (HJ/T299-2007) carry out leaching toxicity test by " solid waste Leaching leaching method sulfuric acid nitrate method ", adopt the heavy metal content in atom spectrophotometry leach liquor, the results are shown in Table 1.
Table 1 city garbage burning ash is processed heavy metal concentration statistics in the leach liquor of front and back
| Sample | Rate of body weight gain (%) | Ultimate compression strength (MPa) | Pb(mg/L) | Cr(mg/L) | Cd(mg/L) | Cu(mg/L) | Ni(mg/L) |
| Flying ash | ------ | ------ | 14.2 | 0.42 | 0.43 | 0.06 | 0.04 |
| End slag | ------ | ------ | 1.33 | 0.21 | 0.05 | 2.03 | 0.64 |
| Embodiment 1 | 5.6 | 12.8 | 1.12 | 0.09 | 0.10 | 0.03 | 0.02 |
| Embodiment 2 | 6.2 | 15.8 | 0.93 | 0.08 | 0.08 | 0.02 | 0.02 |
| Embodiment 3 | 6.0 | 18.6 | 0.98 | 0.08 | 0.09 | 0.03 | 0.03 |
| Embodiment 4 | 7.5 | 25.6 | 0.56 | 0.07 | 0.03 | 1.02 | 0.08 |
| Embodiment 5 | 7.2 | 24.3 | 0.62 | 0.05 | 0.03 | 1.04 | 0.09 |
| Embodiment 6 | 9.5 | 30.6 | 0.28 | 0.03 | 0.01 | 0.76 | 0.06 |
| Embodiment 7 | 8.5 | 26.8 | 1.02 | 0.06 | 0.04 | 0.08 | 0.04 |
Claims (5)
1. a carbonating city garbage burning ash is prepared the method for plastics products for building, it is characterized in that, city garbage burning ash is stirred with water, be pressed into the controlled material of construction preform blank of size and shape, then it is carried out to carbonating processing, obtain plastics products for building;
Described city garbage burning ash is end slag and/or flying dust;
Described water is the 3%-30% of city garbage burning ash quality;
The treatment condition of carbonating: be greater than 1bar, CO at gaseous tension
2concentration in reaction system be not less than 15% and carbonating treatment temp be at 15-150 DEG C process be not less than 0.5 hour.
2. method according to claim 1, is characterized in that, prepares in plastics products for building and also comprises that slag, its add-on are the 5%-90% of city garbage burning ash and slag total mass.
3. method according to claim 1 and 2, is characterized in that, the pressure of described compression moulding is 2-30MPa.
4. method according to claim 1 and 2, is characterized in that, described CO
2derive from industrial tail gas.
5. method according to claim 3, is characterized in that, described CO
2derive from industrial tail gas.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI631091B (en) * | 2017-03-03 | 2018-08-01 | 蔣本基 | A method of modifying alkaline solid wastes as green construction materials |
| CN108794282A (en) * | 2018-06-13 | 2018-11-13 | 大连理工大学 | A kind of efficiency slow release shaped steel slag aggregate processing method based on carbonating maintenance |
| CN111606612A (en) * | 2020-06-14 | 2020-09-01 | 东北林业大学 | Alkali-activated cementitious materials and methods of use thereof |
| JP2021155270A (en) * | 2020-03-27 | 2021-10-07 | 株式会社フジタ | Manufacturing method of construction material |
| CN114007997A (en) * | 2019-06-26 | 2022-02-01 | 奥比斯产品公司 | Method for producing carbonate-bonded compacted articles |
| CN114453402A (en) * | 2022-01-23 | 2022-05-10 | 浙江大学 | Method for efficient carbonation and harmless disposal of waste incineration fly ash |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI631091B (en) * | 2017-03-03 | 2018-08-01 | 蔣本基 | A method of modifying alkaline solid wastes as green construction materials |
| CN108794282A (en) * | 2018-06-13 | 2018-11-13 | 大连理工大学 | A kind of efficiency slow release shaped steel slag aggregate processing method based on carbonating maintenance |
| CN114007997A (en) * | 2019-06-26 | 2022-02-01 | 奥比斯产品公司 | Method for producing carbonate-bonded compacted articles |
| JP2021155270A (en) * | 2020-03-27 | 2021-10-07 | 株式会社フジタ | Manufacturing method of construction material |
| CN111606612A (en) * | 2020-06-14 | 2020-09-01 | 东北林业大学 | Alkali-activated cementitious materials and methods of use thereof |
| CN111606612B (en) * | 2020-06-14 | 2022-04-22 | 东北林业大学 | Alkali-activated cementitious materials and methods of use thereof |
| CN114453402A (en) * | 2022-01-23 | 2022-05-10 | 浙江大学 | Method for efficient carbonation and harmless disposal of waste incineration fly ash |
| CN114453402B (en) * | 2022-01-23 | 2023-03-14 | 浙江大学 | Method for efficient carbonation and harmless disposal of waste incineration fly ash |
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Application publication date: 20140827 |