CN102173721B - Refuse burning fly ash solidification agent and solidification method of refuse burning fly ash - Google Patents

Refuse burning fly ash solidification agent and solidification method of refuse burning fly ash Download PDF

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Publication number
CN102173721B
CN102173721B CN2011100324736A CN201110032473A CN102173721B CN 102173721 B CN102173721 B CN 102173721B CN 2011100324736 A CN2011100324736 A CN 2011100324736A CN 201110032473 A CN201110032473 A CN 201110032473A CN 102173721 B CN102173721 B CN 102173721B
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CN
China
Prior art keywords
incineration
refuse flyash
fly ash
refuse burning
solidification
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CN2011100324736A
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Chinese (zh)
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CN102173721A (en
Inventor
孙家瑛
姜英波
陈伟
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浙江大学宁波理工学院
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Priority to CN2011100324736A priority Critical patent/CN102173721B/en
Publication of CN102173721A publication Critical patent/CN102173721A/en
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Publication of CN102173721B publication Critical patent/CN102173721B/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use 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
    • C04B18/02Agglomerated materials, e.g. artificial aggregates
    • C04B18/021Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02Macromolecular compounds
    • C04B26/26Bituminous materials, e.g. tar, pitch
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a refuse burning fly ash solidification agent comprising the following components in percentage by weight: 35%-60% of slag micropowder, 35%-50% of sodium silicate and 5%-20% of sodium fluosilicate. The invention also discloses a solidification method of refuse burning fly ash, comprising the following steps of: weighing the solidification agent in a formula proportion; mixing and solidifying with the refuse burning fly ash to obtain a refuse burning fly ash solidification body; grinding the refuse burning fly ash solidification body into powder; weighing 10%-100% of refuse burning fly ash solidification body powder in the terms of the mass percent of bituminous mixture fillers, and adding to a bituminous mixture to equivalently substitute limestone powder in the bituminous mixture so that the refuse burning fly ash is secondarily solidified in the bituminous mixture. The invention has the advantages of reducing the leaching toxicity of heavy metals contained in the refuse burning fly ash so that the heavy metals have long-time stability, thereby effectively preventing the secondary pollution of an environment.

Description

The consolidation method of incineration of refuse flyash solidifying agent and incineration of refuse flyash
Technical field
The present invention relates to the consolidation method of a kind of incineration of refuse flyash solidifying agent and incineration of refuse flyash.
Background technology
Incineration treatment of garbage is one of main method that solves domestic waste, burns heavy metals such as the easy Pb that leaches of the flying dust enrichment that produces, Cr, Cd, Cu, Zn, Hg, also contains hypertoxic organism such as Dioxins, belongs to danger wastes.Handle effectively as untimely, will cause very big influence, cause the pollution of water body and soil, and the serious harm mankind's is healthy environment.
At present, Application and Development mainly contains security landfill method, solidification and stabilization and wet chemical treatment method in the method for making fly-ash from incineration harmless and stabilization treatment both at home and abroad.The solidification treatment domestic method comprises fusion technology, cement solidification, chemical agent stabilization and bituminization etc.Melting and solidification need be warmed to a large amount of materials more than the fusing point, no matter is to adopt electric power or other fuel, and the energy and the expense that need all are quite high; Though the cement solidification flying dust is simple, less investment, because of this treatment process makes the cured body increase-volume of flying dust big, bring difficulty for the final landfill of flying dust, and the diafiltration of heavy metal is difficult to avoid after long-time, causes second environmental pollution; Some can stablize the heavy metal in the flying dust effectively during medicament stabilizing treatment Hazardous wastes, and what effect what have does not but have; Simple bituminization can not guarantee the permanent stability of heavy metal.Flying dust wet chemical treatment method has in the acid extraction of adding and the flue gas with carbonation method etc.; This technology running cost is lower; Recyclable heavy metal and salt; But also exist simultaneously the drawback that need handle soluble salt and draining, only be used for generally that heavy metal concentration is higher, under the situation that is necessary to reclaim, so there be limited evidence currently of application.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of prior art, provide a kind of heavy metal that reduces in the flying dust to leach toxicity, make heavy metal have permanent stability, effectively avoid incineration of refuse flyash solidifying agent second environmental pollution.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of incineration of refuse flyash solidifying agent, this solidifying agent is made up of each component of following weight percent: slag micropowder 35%~60%, water glass 35%~50%, Sodium Silicofluoride 98min 5%~20%.
Preferred as further, solidifying agent of the present invention is made up of each component of following weight percent: slag micropowder 45%~50%, water glass 40%~50%, Sodium Silicofluoride 98min 5%~15%.
As most preferably, solidifying agent of the present invention is made up of each component of following weight percent: slag micropowder 45%, water glass 43%, Sodium Silicofluoride 98min 12%.
The above-mentioned slag micropowder of the present invention is not less than 70% slag micropowder for the total content of silicon-dioxide and aluminium sesquioxide wherein, reaches 95 scoriaceous technical requirements, like S95 type slag micropowder.
The above-mentioned water glass of the present invention is 51 ° of degree Beaume (20 ℃) (° B é), density 1.540g/cm 3, the water glass of modulus 2.32.Establishing criteria is: industrial metasilicate GB/T 4209-2008.
Above-mentioned composition material need not special processing, and sale of finished goods is all arranged on the market.
Another technical problem that the present invention will solve is, a kind of consolidation method of incineration of refuse flyash is provided, and concrete steps are:
(1) for the first time fixed: take by weighing the solidifying agent of claim 1 formula rate, mix fixedly with incineration of refuse flyash, wherein solidifying agent is that 35%~65% weight percent, incineration of refuse flyash are 35%~65% weight percent; Solidifying agent and incineration of refuse flyash are cured 27~29 days then, obtain the incineration of refuse flyash induration;
(2) for the second time fixed: that the incineration of refuse flyash induration of step (1) gained is worn into powder; Take by weighing incineration of refuse flyash induration powder in asphalt packing quality per-cent 10%~100%; Add the asphalt moderate to and substitute the limestone powder in the asphalt, make incineration of refuse flyash in asphalt, obtain secondary consolidation.
Curing of the present invention was preferably 28 days for natural curing (the conventional natural curing method of industry) 27~29 days in 27~29 days.
Above-mentioned asphalt is the conventional known asphalt of industry; Filler in the asphalt also is the conventional filler that uses of industry, and the limestone powder in the asphalt adopts with 10%~100% of asphalt filler weight and substituted by incineration of refuse flyash induration of the present invention.
Advantage of the present invention and beneficial effect:
1. solidifying agent of the present invention carries out consolidation process to flying ash, and the heavy metal that reduces in the flying ash leaches toxicity, makes heavy metal have chronicity stability, avoids second environmental pollution; Utilize the incineration of refuse flyash induration after fixed to prepare asphalt simultaneously; Reach purpose, and adopt the pavement performance and the endurance quality of the asphalt of incineration of refuse flyash induration preparation all to be superior to plain asphalt compound with proportioning to the incineration of refuse flyash secondary consolidation.Through fixed, and recycling to incineration of refuse flyash, flying dust is turned waste into wealth, realized the net effect of incineration of refuse flyash minimizing, resource utilization.
2. technical scheme of the present invention is at first to adopt slag micropowder, water glass, Sodium Silicofluoride 98min that incineration of refuse flyash is carried out the fixed incineration of refuse flyash induration that obtains, and adopts incineration of refuse flyash induration preparation asphalt to realize the purpose to the incineration of refuse flyash secondary consolidation then; Use the 28 days intensity of induration that obtains behind the fixed flying ash of solidifying agent of the present invention greater than more than the 40MPa; It is following that induration leaches toxicity index: Cu<0.5mg/L; Pb<1.0mg/L; Zn<2.0mg/L; Cr<1.5mg/L; Cd<0.1mg/L; Hg<0.05mg/L; As<0.5mg/L; Ni<1.0mg/L; Dioxins concentration is lower than 3ugTEQ/kg.Can reach the harmless treatment target fully; Asphalt after the pitch secondary consolidation adopts flying dust induration preparation asphalt can make its anti-rut performance improve 30%, and anti-water enchroachment (invasion) evil performance improves about 10%, and performance obviously is superior to the plain asphalt compound with proportioning.
3. the present invention proposes the concept of compatibility of pitch and incineration of refuse flyash induration first; The consistency evaluation index of initiative pitch and incineration of refuse flyash induration; And announcement consistency mechanism; Provide fundamental basis for heavy metal in can permanently effective fixed flying dust, adopt the asphalt physical and mechanical property and the pavement performance of the preparation of flying dust induration to be superior in addition with proportioning plain asphalt compound.
Embodiment
Come the present invention is described further below in conjunction with embodiment, but the present invention not only is confined to following examples.
Embodiment 1
Solidifying agent: slag micropowder 45%, water glass 45%, Sodium Silicofluoride 98min 10%; Get solidifying agent 40wt% then and mix, and maintenance formed incineration of refuse flyash induration (accomplishing a secondary consolidation of incineration of refuse flyash) in 28 days with the weight ratio of incineration of refuse flyash 60wt%; The incineration of refuse flyash induration is pulverized; Adopt above-mentioned incineration of refuse flyash induration powder in limestone powder preparation asphalt in 40% equivalent substitution (the incineration of refuse flyash induration powder that promptly adds how many grams just substitutes the limestone powder that what restrain in the pitch) asphalt of asphalt packing quality per-cent again, make incineration of refuse flyash in pitch, obtain secondary consolidation.
The technical indicator of incineration of refuse flyash induration asphalt: residual stability is 90%, dynamic stability/(inferior .mm -1) 4366.
Embodiment 2
Solidifying agent: slag micropowder 50%, water glass 35%, Sodium Silicofluoride 98min 15%; Getting solidifying agent 60wt% then mixes with the weight ratio of incineration of refuse flyash 40wt%; And maintenance formation in 28 days incineration of refuse flyash induration, adopt above-mentioned incineration of refuse flyash induration in limestone powder preparation asphalt in the 80% equivalent substitution asphalt of asphalt packing quality per-cent again.
The technical indicator of incineration of refuse flyash induration asphalt: residual stability is 88%, dynamic stability/(inferior .mm -1) 3455.
Embodiment 3
Solidifying agent: slag micropowder 45%, water glass 43%, Sodium Silicofluoride 98min 12%; Getting solidifying agent 50wt% then mixes with the weight ratio of incineration of refuse flyash 500wt%; And maintenance formation in 28 days incineration of refuse flyash induration, adopt above-mentioned incineration of refuse flyash induration in limestone powder preparation asphalt in the asphalt packing quality per-cent 60% equivalent substitution asphalt again.
The technical indicator of incineration of refuse flyash induration asphalt: residual stability is 93%, dynamic stability/(inferior .mm -1) 5011.

Claims (6)

1. the consolidation method of an incineration of refuse flyash, it is characterized in that: concrete steps are:
(1) for the first time fixed: take by weighing solidifying agent: this solidifying agent contains each component of following weight percent: slag micropowder 35% ~ 60%, water glass 35% ~ 50%, Sodium Silicofluoride 98min 5% ~ 20%; Mix fixedly with incineration of refuse flyash, wherein solidifying agent is that 35% ~ 65% weight percent, incineration of refuse flyash are 35% ~ 65% weight percent; Solidifying agent and incineration of refuse flyash are cured 27 ~ 29 days then, obtain the incineration of refuse flyash induration;
(2) for the second time fixed: that the incineration of refuse flyash induration of step (1) gained is worn into powder; Take by weighing incineration of refuse flyash induration powder in asphalt packing quality per-cent 10% ~ 100%; Add the asphalt moderate to and substitute the limestone powder in the asphalt, make incineration of refuse flyash in asphalt, obtain secondary consolidation.
2. the consolidation method of incineration of refuse flyash according to claim 1 is characterized in that: described curing was natural curing 27 ~ 29 days in 27 ~ 29 days.
3. the consolidation method of incineration of refuse flyash according to claim 1, it is characterized in that: this solidifying agent contains each component of following weight percent: slag micropowder 45% ~ 50%, water glass 40% ~ 50%, Sodium Silicofluoride 98min 5% ~ 15%.
4. the consolidation method of incineration of refuse flyash according to claim 3, it is characterized in that: this solidifying agent contains each component of following weight percent: slag micropowder 45%, water glass 43%, Sodium Silicofluoride 98min 12%.
5. the consolidation method of incineration of refuse flyash according to claim 1, it is characterized in that: described slag micropowder is that the total content of silicon-dioxide and aluminium sesquioxide is not less than 70% slag micropowder.
6. the consolidation method of incineration of refuse flyash according to claim 1, it is characterized in that: described water glass is 51 ° of B é of degree Beaume, density 1.540g/cm 3, the water glass of modulus 2.32.
CN2011100324736A 2011-01-25 2011-01-25 Refuse burning fly ash solidification agent and solidification method of refuse burning fly ash CN102173721B (en)

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CN102659335B (en) * 2012-04-11 2013-08-07 浙江大学宁波理工学院 Asphalt mixture anti-rut agent and preparation method thereof
CN103241969A (en) * 2013-05-24 2013-08-14 南京工程学院 Method for treating waste incineration fly ash
TW201609222A (en) * 2014-06-04 2016-03-16 首威公司 Stabilization of sodic fly ash using a water-soluble source of silicate and a material containing calcium and/or magnesium
CN105693123B (en) * 2016-03-10 2018-04-10 重庆三峰环境产业集团有限公司 The method and its clean applications in bituminous paving that domestic garbage incineration flyash is granulated altogether with cement, silicon ash, flyash
CN105623286B (en) * 2016-03-10 2017-11-07 重庆三峰环境产业集团有限公司 The method and its clean applications in road surface of macromolecule resin material encapsulating domestic garbage incineration flyash
CN105964652B (en) * 2016-05-10 2019-06-07 苏州大学 A kind of solidification and stabilization processing method for incineration of refuse flyash
CN106396592B (en) * 2016-08-30 2019-06-28 北科蕴宏环保科技(北京)有限公司 A kind of preparation method of the mine cemented filling material of resource utilization hazardous waste containing cadmium
CN106431027A (en) * 2016-08-30 2017-02-22 北京玉锦资源与环境技术研究院(有限合伙) Mining cemented filling for co-treating nickel-containing dangerous wastes, and preparation method of cemented filling
CN106348711A (en) * 2016-08-30 2017-01-25 北京玉锦资源与环境技术研究院(有限合伙) Cementing filling material for co-processing mercury-containing dangerous wastes of mine and preparation method of cementing filling material
CN106348714A (en) * 2016-08-30 2017-01-25 北京玉锦资源与环境技术研究院(有限合伙) Cementing filling material for co-processing zinc-containing dangerous waste of mine and preparation method of cementing filling material
CN106348712A (en) * 2016-08-30 2017-01-25 北京玉锦资源与环境技术研究院(有限合伙) Cementing filling material for co-processing lead-containing dangerous wastes of mine and preparation method of cementing filling material
CN108275966B (en) * 2017-12-18 2020-11-03 启迪桑德环境资源股份有限公司 Method for manufacturing refractory brick by using household garbage incineration fly ash

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CN1530181A (en) * 2003-03-17 2004-09-22 上海静安市政工程有限公司 Processing method for house refuse
CN101684038A (en) * 2008-09-28 2010-03-31 要明伦 Curing agent and construction method of weak soil

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CN101684038A (en) * 2008-09-28 2010-03-31 要明伦 Curing agent and construction method of weak soil

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