CN108314366A - A method of utilizing domestic garbage incineration flyash and furnace slag brick making - Google Patents
A method of utilizing domestic garbage incineration flyash and furnace slag brick making Download PDFInfo
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- CN108314366A CN108314366A CN201810209824.8A CN201810209824A CN108314366A CN 108314366 A CN108314366 A CN 108314366A CN 201810209824 A CN201810209824 A CN 201810209824A CN 108314366 A CN108314366 A CN 108314366A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/006—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mineral polymers, e.g. geopolymers of the Davidovits type
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The invention discloses a kind of methods using domestic garbage incineration flyash and furnace slag brick making.This method comprises the following steps：(1) CaO in flying dust is cured；(2) sulfur-containing compound and cement is added in material after curing, stirring homogeneous carries out heavy metal stabilization；(3) material after heavy metal stabilization is conserved, obtains fly-ash heavy metal firming body；(4) fly-ash heavy metal firming body is crushed, obtains flying dust powder；(5) CaO in clinker is cured；(6) material after curing is dried, obtains furnace clinker；(7) furnace clinker is crushed, obtains clinker powder；(8) combination ash flies powder, clinker powder, flyash, NaOH and water, obtains mortar；(9) mortar conserved, be molded, obtain brick.The present invention makes building materials using native coagel and hydrated calcium silicate, carries out recycling to flying dust and clinker, improves brick body mechanical performance, the heavy metal in flying dust obtains multistage solidification and stabilization.
Description
Technical field
The present invention relates to a kind of method using domestic garbage incineration flyash and furnace slag brick making, belong to hazardous waste with it is general
Industrial waste building resourceization utilizes technical field.
Background technology
Domestic garbage incineration flyash (hereinafter referred to as flying dust) refers to using system in flue gas purification system and recuperation of heat (as saved
Hot device, waste heat boiler etc.) in collect obtained by residue.
Due to the volatilization and migration of heavy metal in burning process, make to be enriched plurality of heavy metal in flying dust, as Hg, Pb, Cd,
Cu, Cr, Zn, Ni etc..In existing literature report, in China's flying dust, Zn reaches as high as 17000mg/kg, and Cu is reached as high as
12000mg/kg, Pb reach as high as 30000mg/kg, and Cd reaches as high as 5000mg/kg, and Cr reaches as high as 3500mg/kg, and Ni is most
High reachable 1500mg/kg.Heavy metal once would become hard to excrete into human body, and enrichment to a certain extent, can directly injure people
Nervous system, digestive system, reproductive system, immune system and the bone of body cause human body enzymatic activity to reduce, language and movement hinder
Hinder, is hepatorenal damage, bone-loss, carcinogenic, teratogenesis, mutagenesis, neurasthenia, anaemia, even dead.Flying dust was early in quilt in 2008
It is included in《National Hazard waste register》, and still appear in version in 2016《National Hazard waste register》, it is solid to belong to hazardous industry
Body waste.
In recent years, China's domestic garbage burning electricity generation is rapidly developed.Ended for the end of the year 2015, the built life rubbish in the whole nation
Rubbish incineration plant 219, year handle 80,000,000 tons of quantity of refuse.Incineration technology develop while, also bring often be close on 5000000 tons fly
Ash, accounting for China, all kinds of hazardous wastes generate nearly the 12% of total amount every year.
Flying dust, the process problem of this hazardous industry solid waste are one of environmental problems at present urgently.Currently, flying
The main processing ways of this grey hazardous industry solid waste are filled after solidification and stabilization.Although version in 2016《State
Family's Hazardous Waste List》Household refuse landfill sites are entered to the flying dust after stabilisation and implement exemption management, but are enclosed in rubbish
Under the present situation in city, landfill is makeshift.In China, the main whereabouts of general industrial solid waste is to be recycled, by
In Industrial Solid Waste rich in elements such as Si, Al, Ca, so building materials production industry is the maximum consumption of Industrial Solid Waste and utilizes industry.
According to the statistics of China environmental protection industry association, 2013, the tailing in China 43%, 68% gangue, 93% flyash, absolutely
Most iron steel smelting slag is all used for production of construction materials, builds the road etc..And flying dust this hazardous industry solid waste is main
Element is also Si, Al, Fe, Mg, Ca, K, Na and Cl, SiO2、A12O3、CaO、Fe2O3、Na2O、K2O generally existings in flying dust,
SiO2Content 6.35-35.5%, A12O3Content 0.92-13.7%, Fe2O3Content 0.63-10.5%, CaO content 16.6-
45.4%, MgO, Na2O、K2O respectively accounts for 1%-5%.Such element composition, necessary object is provided for the building resource of flying dust
Matter basis.Flying dust, using recycling is carried out, is main research and the application direction in future by building materials.
Currently, the approach that flying dust carries out recycling by building materialsization mainly has production cement, makes concrete, system
Brick, roadbed paving, construction dykes and dams etc., although approach is more, the building materials produced using flying dust, the overwhelming majority is silicate
Class building materials, when particularly for brickmaking recycling, it is the building materials brick product mainly formed, mechanicalness that product, which is mostly with calcium silicate crystals,
Can be slightly worse with environment friendly, the stabilisation solidification effect of especially heavy metal is to be improved, limits flying dust recycling brick
Use scope also limits market and the development of flying dust recycling brick.
Invention content
The object of the present invention is to provide a kind of method using domestic garbage incineration flyash and furnace slag brick making, this method cooperations
Building materials are made using the gel of native coagel and the different crystalline phase properties of two kinds of hydrated calcium silicate, to this hazardous waste of flying dust and stove
This solid waste of slag has carried out recycling, improves brick body mechanical performance, and the heavy metal in flying dust is also cured
It stabilizes.
The first purpose of the invention is to provide a kind of methods using domestic garbage incineration flyash and furnace slag brick making, including
Following steps：
(1) CaO in flying dust is cured；
(2) sulfur-containing compound and cement are added in the material after curing described in step (1), stirring homogeneous carries out a huge sum of money
The stabilisation of category；
(3) material after heavy metal stabilization described in step (2) is conserved, obtains the heavy metals immobilization of flying dust
Body；
(4) the heavy metals immobilization body of flying dust described in step (3) is crushed, obtains flying dust powder；
(5) CaO in clinker is cured；
(6) material after curing described in step (5) is dried, obtains furnace clinker；
(7) furnace clinker described in step (6) is crushed, obtains clinker powder；
(8) flying dust powder described in mixing step (4), clinker powder, flyash, NaOH and water described in step (7), obtain
To mortar；
(9) mortar conserved, be molded, obtain building material brick.
Above-mentioned preparation method, in step (1), the step of curing, is as follows：Flying dust is mixed with water, obtains flying dust slurry
Liquid；Homogeneous is stirred to the flying dust slurries, completes the curing of CaO in the flying dust.
The quality of the water can be the 50%~70% of the flying dust quality, concretely 70%.
The temperature of the stirring homogeneous can be 15~30 DEG C, and concretely 25 DEG C, the time can be 2~3d, concretely 2d.
The curing converts a large amount of existing CaO in the flying dust to Ca (OH)2, it is therefore intended that avoid excessive free state
CaO generates internal stress in building materials, influences intensity.
Above-mentioned preparation method, in step (2), the sulfur-containing compound can be inorganic sulphide or organic sulfur compound；Institute
It can be Na to state inorganic sulphide2S；
The quality of the sulfur-containing compound can be the 2%~3% of the flying dust dry ash quality, concretely 3%.
The quality of the cement is the 3%~5% of the flying dust dry ash quality, concretely 3%.
The cement can be 52.5# cement.
The temperature of the stirring homogeneous can be 20~25 DEG C, concretely 23~25 DEG C, 25 DEG C, 23 DEG C or 24 DEG C；Time
Can be 15min~30min, concretely 15min.
The Na2S can discharge S2-Precipitate the heavy metal in flying dust, while the NaOH of the quality such as generation.There are two make by NaOH
With first, precipitation of heavy metals, second is that can activate Si the and Al metasable state material in flying dust the dissolution of Si-Al occurs and polymerize again
Geo -polymerization.The effect of the cement is the Ca (OH) for activating flying dust curing to generate2With the metasable state object with pozzolanic
Matter waits for that maintenance develops into hydrated calcium silicate gel.
Above-mentioned preparation method, in step (3), the condition of the maintenance can be as follows：Temperature be 20~25 DEG C (such as 25 DEG C,
20 DEG C), relative humidity ＞ 90% (such as 95%~98%, 95%, 98% or 96%).
The time of the maintenance can be 2~3d, concretely 2d.
The mechanical strength of the heavy metals immobilization body of the flying dust can be 3~5MPa.
The maintenance makes native coagel and hydrated calcium silicate constantly develop, and generates mechanical strength, and complete to heavy metal
First time solidification and stabilization.
Above-mentioned preparation method, in step (4), the broken mesh number is less than 16 mesh (grain size ＜ 1mm).
Above-mentioned preparation method, in step (5), the step of curing, is as follows：Clinker is mixed with water, obtains clinker slurry
Liquid；Homogeneous is stirred to the clinker slurries, completes the curing of CaO in the clinker.
The quality of the water can be the 50%~70% of the clinker quality, concretely 70%；
The temperature of the stirring can be 15~30 DEG C, concretely 25 DEG C；Time can be 1~2d, concretely 1d.
The curing can eliminate excessive free state CaO in clinker.
Above-mentioned preparation method, in step (6), the drying can be to be spontaneously dried in ventilated environment.
Above-mentioned preparation method, in step (7), the broken mesh number may be less than 32 mesh (grain size ＜ 0.5mm).
Above-mentioned preparation method, it is the flying dust powder, the clinker powder, the flyash, described in step (8)
The mass ratio of NaOH and the water can be 5:10:(3~5):(0.5~2):10, concretely 5:10:(3~5):(1~2):
10、5:10:(3~5):(1.5~2):10、5:10:(3~5):(1~1.5):10、5:10:3:1:10、5:10:5:1.5:10、
5:10:5:2:10、5:10:5:1.5:10、5:10:3:1.5:10 or 5:10:5:2:10.The flyash can be III grade or more
The flyash of (I grade, II grade and III grade).The flyash is rich in metasable state Si, Al element, can be improved Si in mixed material,
The content of Al elements.The NaOH can activate the metasable state material in mixed mortar, activate geo -polymerization, generate native coagel.
Above-mentioned preparation method, in step (9), the condition of the maintenance can be as follows：Temperature is 60~75 DEG C (such as 65~70
DEG C, 70~75 DEG C, 60 DEG C, 65 DEG C, 70 DEG C or 75 DEG C), relative humidity ＜ 30% (such as 20%~25%, 20%, 22%, 23%
Or 25%).
The maintenance can be first to conserve 3d under the described conditions, mold, then conserve 4d under the described conditions；
Mechanical strength >=10MPa of the brick, such as 11MPa, 13MPa, 10MPa, 12MPa.
In the maintenance processes, under the activation of NaOH, Si, Al element dissolve out and in Na ions metasable state material in slurry
Bridge linking effect under occur polymerisation, form the network-like polymer gel of Si-Al-O long-chains, form native coagel.Soil is poly-
Gel relies on its non-crystal package action, completes second of solidification and stabilization to heavy metal, meanwhile, generate mechanical strength.
Second object of the present invention is to provide the building material brick that above-mentioned preparation method is prepared.
Third object of the present invention is to provide above-mentioned building material bricks following 1) -4) at least one of in application：
1) municipal works are built；
2) it is laid with pavement road surface；
3) it is laid with curb；
4) flower bed or flower stand are laid with.
The preparation-obtained building material brick of the present invention, is directly utilized domestic garbage incineration flyash and clinker, realizes material
Recycle, energy-saving, this method can become the end collaboration technique of MSW Incineration Plant, industrial in consumption
Value is created while waste.It is worth noting that the building material brick prepared by the present invention, is gathered by hydrated calcium silicate gel and soil
What the gel of the different crystalline phase properties of two kinds of gel collectively formed, the building materials brick product phase with single silicate sturcture in the prior art
Than, there is better acid-resisting, more stable calorifics and mechanical characteristic, and more environment friendly, it is steady to the solidification of heavy metal
Surely it is more excellent to change effect, the use scope of flying dust building material brick can be extended, bring the environment and economic benefit of bigger.
The present invention has the advantages that：
(1) broad spectrum activity.This kind can be directed to different regions, no using the brick-making technology of domestic garbage incineration flyash and clinker
Domestic garbage incineration flyash with the type of furnace carries out recycling.
(2) simple for process.This kind relies primarily on temperature control, adds using the brick-making technology of domestic garbage incineration flyash and clinker
Equipment and the common raw material such as material, stirring, broken, other are simple flow, reliable without particular/special requirement.
(3) heavy metals immobilization stabilization effect is good.It, can be right according to the processing step and parameter setting in this technology method
Heavy metal in flying dust carries out multistage solidification and stabilization, works well.
(4) environmental benefit is good.According to the processing step in this technology method, safe having been dissolved using building materials means is flown
This grey hazardous waste, solves problem of environmental pollution.
(6) social and economic benefits and good.This kind is realized simultaneously using the brick-making technology of domestic garbage incineration flyash and clinker
To the solidification and stabilization of heavy metal in flying dust, recycling is utilized to the building materials of flying dust and clinker, and to recycling building material machinery
The promotion of performance.Building materials can be used for being laid with pavement road surface, build flower bed and flower stand, be laid with the municipal works such as curb, will generate
Good society and economic benefit.
A kind of method using domestic garbage incineration flyash and furnace slag brick making of the invention, process, device simple, principle
Simply, can be safe and efficient using different regions, the domestic garbage incineration flyash and dregs of incinerator of the different type of furnaces, it realizes simultaneously
To the solidification and stabilization of heavy metal in flying dust, recycling is utilized to the building materials of flying dust and clinker, and to recycling building materials machine
The promotion of tool performance.
Description of the drawings
Fig. 1 is the flow chart that the present invention utilizes domestic garbage incineration flyash and furnace slag brick making.
Specific implementation mode
Experimental method used in following embodiments is conventional method unless otherwise specified.
The materials, reagents and the like used in the following examples is commercially available unless otherwise specified.
Embodiment 1 utilizes domestic garbage incineration flyash and furnace slag brick making
Flying dust sample and g of slag sample content of beary metal and leaching in Daxing District garbage burning factory, flying dust sample
Output is shown in Table 1.Leaching method reference《Solid waste Leaching leaching method horizontal vibration method》(HJ557-2010), limit value mark
Quasi- reference《Water environment quality standard》(GB3838-2002) V class water body standard in.As shown in Table 1, Pb leaching contents are serious
It is exceeded.
Go in a big way content of beary metal and leaching content in certain garbage burning factory flying dust in 1 Beijing of table
Domestic garbage incineration flyash and furnace slag brick making are utilized according to flow chart shown in Fig. 1, is as follows：
(1) flying dust cures：
Flying dust is mixed with water, amount of water is the 70% of flying dust quality, and slurries obtained stir homogeneous at 25 DEG C of room temperature
2d is cured.
(2) heavy metal stabilization：
The Na of flying dust quality (dry ash) 3% is added in flying dust slurries after curing in step (1)2S's and 3%52.5#
Cement stirs homogeneous 15min, carries out the stabilisation of heavy metal under the conditions of 25 DEG C of room temperature.
(3) maintenance development：
Material after heavy metal stabilization in step (2) is conserved 2 under conditions of 25 DEG C, 95%RH (relative humidity)
It, obtains the heavy metals immobilization body of flying dust.Heavy metals immobilization body compression strength is 3.1MPa, 4.2MPa, 3.4MPa.
(4) firming body is broken：
The heavy metals immobilization body of flying dust in step (3) is crushed under 16 mesh sieve (grain size ＜ 1mm), flying dust powder is obtained.
(5) clinker cures：
Clinker is mixed with water, amount of water is the 70% of clinker quality, and slurries obtained are in 25 DEG C of stirring homogeneous 1d of room temperature
It is cured.
(6) it spontaneously dries：
Clinker slurries after curing in step (5) are spontaneously dried in ventilated environment, obtain furnace clinker.
(7) cake broke：
Furnace clinker in step (6) is crushed, it is broken to reach under 32 mesh sieve (grain size ＜ 0.5mm), it is broken to obtain clinker
Particle.
(8) mortar processed is mixed：
Flying dust broken material, clinker broken material, flyash, NaOH together water mixing are made and make mortar.Wherein, using I grade of powder
Coal ash.Mixed material mass ratio is flying dust broken material：Clinker broken material：Flyash：NaOH：Water=5:10:3:1:10.Fully
Stirring, is placed in mold.
(9) it conserves：
By mortar be placed in 65 DEG C, 20%RH (relative humidity) conserve 3 days after mold, brick is supported in this context again after die sinking
Shield 4 days conserves 7 days altogether.
(10) molding uses：
Brick through maintenance in 7 days can reach 11.0MPa, 15.1MPa, 12.5MPa.Leaching of Heavy Metals amount meets III class water body
Quality requirement (table 2).Building materials are for being laid with pavement road surface.
Go in a big way Leaching of Heavy Metals amount in flying dust recycling brick product in 2 Beijing of table
Embodiment 2 utilizes domestic garbage incineration flyash and furnace slag brick making
Flying dust sample and g of slag sample content of beary metal and leaching in Xingtai garbage burning factory, flying dust sample
Amount is shown in Table 3.Leaching method reference《Solid waste Leaching leaching method horizontal vibration method》(HJ557-2010), standard limit
Reference《Water environment quality standard》(GB3838-2002) V class water body standard in.As shown in Table 3, Pb, Zn leaching content are serious
It is exceeded.
Content of beary metal and leaching content in 3 Xingtai garbage burning factory flying dust of table
Domestic garbage incineration flyash and furnace slag brick making are utilized according to flow chart shown in Fig. 1, is as follows：
(1) flying dust cures：
Flying dust is mixed with water, amount of water is the 70% of flying dust quality, and slurries obtained stir homogeneous at 25 DEG C of room temperature
2d is cured.
(2) heavy metal stabilization：
The Na of flying dust quality (dry ash) 3% is added in flying dust slurries after curing in step (1)2S's and 3%52.5#
Cement stirs homogeneous 15min, carries out the stabilisation of heavy metal under the conditions of 23 DEG C of room temperature.
(3) maintenance development：
Material after heavy metal stabilization in step (2) is conserved 2 under conditions of 25 DEG C, 98%RH (relative humidity)
It, obtains the heavy metals immobilization body of flying dust.Heavy metals immobilization body compression strength reaches 3.2MPa, 3.5MPa, 4.1MPa.
(4) solidification is broken：
The heavy metals immobilization body of flying dust in step (3) is crushed under 16 mesh sieve (grain size ＜ 1mm), flying dust powder is obtained.
(5) clinker cures：
Clinker is mixed with water, amount of water is the 70% of clinker quality, and slurries obtained stir homogeneous at 25 DEG C of room temperature
1d is cured.
(6) it spontaneously dries：
Clinker slurries after curing in step (5) are spontaneously dried in ventilated environment, obtain furnace clinker.
(7) cake broke：
Furnace clinker in step (6) is crushed, it is broken to reach under 32 mesh sieve (grain size ＜ 0.5mm).
(8) mortar processed is mixed：
Flying dust broken material, clinker broken material, flyash, NaOH together water mixing are made and make mortar.Wherein, using II grade of powder
Coal ash.Mixed material mass ratio is flying dust broken material：Clinker broken material：Flyash：NaOH：Water=5:10:5:1.5:10.It fills
Divide stirring, is placed in mold.
(9) it conserves：
By mortar be placed in 70 DEG C, 20%RH (relative humidity) conserve 3 days after mold, brick is supported in this context again after die sinking
Shield 4 days conserves 7 days altogether.
(10) molding uses：
Brick through maintenance in 7 days can reach 12.1MPa, 11.0MPa, 11.7MPa.Leaching of Heavy Metals amount meets III class water body
Quality requirement (table 4).Building materials are for being laid with pavement road surface.
Leaching of Heavy Metals amount in 4 Xingtai flying dust recycling brick product of table
Embodiment 3 utilizes domestic garbage incineration flyash and furnace slag brick making
Flying dust sample and g of slag sample content of beary metal and leaching in Linchu, shantung garbage burning factory, flying dust sample
Amount is shown in Table 5.Leaching method reference《Solid waste Leaching leaching method horizontal vibration method》(HJ557-2010), standard limit
Reference《Water environment quality standard》(GB3838-2002) V class water body standard in.As shown in Table 5, Pb, Cr leaching content are super
Mark.
Content of beary metal and leaching content in 5 Linchu, shantung garbage burning factory flying dust of table
Domestic garbage incineration flyash and furnace slag brick making are utilized according to flow chart shown in Fig. 1, is as follows：
(1) flying dust cures：
Flying dust is mixed with water, amount of water is the 70% of flying dust quality, and slurries obtained stir homogeneous at 25 DEG C of room temperature
2d is cured.
(2) heavy metal stabilization：
The Na of flying dust quality (dry ash) 3% is added in flying dust slurries after curing in step (1)2S's and 3%52.5#
Cement stirs homogeneous 15min, carries out the stabilisation of heavy metal under the conditions of 24 DEG C of room temperature.
(3) maintenance development：
Material after step (2) heavy metal stabilization is conserved 2 days under conditions of 20 DEG C, 96%RH (relative humidity),
Obtain the heavy metals immobilization body of flying dust.Heavy metals immobilization body compression strength reaches 4.5MPa, 4.0MPa, 4.2MPa.
(4) solidification is broken：
The heavy metals immobilization body of flying dust in step (3) is crushed under 16 mesh sieve (grain size ＜ 1mm), flying dust powder is obtained.
(5) clinker cures：
Clinker is mixed with water, amount of water is the 70% of clinker quality, and slurries obtained stir homogeneous at 25 DEG C of room temperature
1d is cured.
(6) it spontaneously dries：
Clinker slurries after curing in step (5) are spontaneously dried in ventilated environment, obtain furnace clinker.
(7) cake broke：
Furnace clinker in step (6) is crushed, it is broken to reach under 32 mesh sieve (grain size ＜ 0.5mm).
(8) mortar processed is mixed：
Flying dust broken material, clinker broken material, flyash, NaOH together water mixing are made and make mortar.Wherein, using I grade of powder
Coal ash.Mixed material mass ratio is flying dust broken material：Clinker broken material：Flyash：NaOH：Water=5:10:5:2:10.Fully
Stirring, is placed in mold.
(9) it conserves：
By mortar be placed in 75 DEG C, 22%RH (relative humidity) conserve 3 days after mold, brick is supported in this context again after die sinking
Shield 4 days conserves 7 days altogether.
(10) molding uses：
Brick through maintenance in 7 days can reach 13.1MPa, 13.0MPa, 13.4MPa.Leaching of Heavy Metals amount meets III class water body
Quality requirement (table 6).Building materials are for building flower bed and flower stand.
Leaching of Heavy Metals amount in 6 Linchu, shantung flying dust recycling brick product of table
Embodiment 4 utilizes domestic garbage incineration flyash and furnace slag brick making
Flying dust sample and g of slag sample content of beary metal and leaching in Jilin Dehui garbage burning factory, flying dust sample
Amount is shown in Table 7.Leaching method reference《Solid waste Leaching leaching method horizontal vibration method》(HJ557-2010), standard limit
Reference《Water environment quality standard》(GB3838-2002) V class water body standard in.As shown in Table 7, Pb, Zn, Cd leaching content
It is exceeded.
Content of beary metal and leaching content in 7 Jilin Dehui garbage burning factory flying dust of table
Domestic garbage incineration flyash and furnace slag brick making are utilized according to flow chart shown in Fig. 1, is as follows：
(1) flying dust cures：
Flying dust is mixed with water, amount of water is the 70% of flying dust quality, and slurries obtained stir homogeneous at 25 DEG C of room temperature
2d is cured.
(2) heavy metal stabilization：
The Na of flying dust quality (dry ash) 3% is added in flying dust slurries after curing in step (1)2S's and 3%52.5#
Cement stirs homogeneous 15min, carries out the stabilisation of heavy metal under the conditions of 25 DEG C of room temperature.
(3) maintenance development：
Material after heavy metal stabilization in step (2) is conserved 2 under conditions of 25 DEG C, 98%RH (relative humidity)
It, obtains the heavy metals immobilization body of flying dust.Heavy metals immobilization body compression strength reaches 3.0MPa, 3.2MPa, 3.6Mpa.
(4) solidification is broken：
The heavy metals immobilization body of flying dust in step (3) is crushed under 16 mesh sieve (grain size ＜ 1mm), it is broken to obtain flying dust
Material.
(5) clinker cures：
Clinker is mixed with water, amount of water is the 70% of clinker quality, and slurries obtained stir homogeneous at 25 DEG C of room temperature
1d is cured.
(6) it spontaneously dries：
Step (5) clinker slurries after curing are spontaneously dried in ventilated environment, obtain furnace clinker.
(7) cake broke：
Furnace clinker in step (6) is crushed, it is broken to reach under 32 mesh sieve (grain size ＜ 0.5mm).
(8) mortar processed is mixed：
Flying dust broken material, clinker broken material, flyash, NaOH together water mixing are made and make mortar.Wherein, using I grade of powder
Coal ash.Mixed material mass ratio is flying dust broken material：Clinker broken material：Flyash：NaOH：Water=5:10:5:1.5:10.It fills
Divide stirring, is placed in mold.
(9) it conserves：
By mortar be placed in 65 DEG C, 23%RH (relative humidity) conserve 3 days after mold, brick is supported in this context again after die sinking
Shield 4 days conserves 7 days altogether.
(10) molding uses：
Brick through maintenance in 7 days can reach 11.0MPa, 11.2MPa, 11.5MPa.Leaching of Heavy Metals amount meets III class water body
Quality requirement (table 8).Building materials are for being laid with curb.
Leaching of Heavy Metals amount in 8 Jilin Dehui flying dust recycling brick product of table
Embodiment 5 utilizes domestic garbage incineration flyash and furnace slag brick making
Flying dust sample and g of slag sample content of beary metal and leaching in Chongqing Kaixian garbage burning factory, flying dust sample
Amount is shown in Table 9.Leaching method reference《Solid waste Leaching leaching method horizontal vibration method》(HJ557-2010), standard limit
Reference《Water environment quality standard》(GB3838-2002) V class water body standard in.As shown in Table 9, Pb, Zn, Cd, Cr are leached
It measures exceeded.
Content of beary metal and leaching content in 9 Chongqing Kaixian garbage burning factory flying dust of table
Domestic garbage incineration flyash and furnace slag brick making are utilized according to flow chart shown in Fig. 1, is as follows：
(1) flying dust cures：
Flying dust is mixed with water, amount of water is the 70% of flying dust quality, and slurries obtained stir homogeneous at 25 DEG C of room temperature
2d is cured.
(2) heavy metal stabilization：
The Na of flying dust quality (dry ash) 3% is added in flying dust slurries after curing into step (1)2S's and 3%52.5#
Cement stirs homogeneous 15min, carries out the stabilisation of heavy metal under the conditions of 25 DEG C of room temperature.
(3) maintenance development：
Material after heavy metal stabilization in step (2) is conserved 2 under conditions of 25 DEG C, 98%RH (relative humidity)
It, obtains the heavy metals immobilization body of flying dust.Heavy metals immobilization body compression strength reaches 3.6MPa, 3.1MPa, 3.9MPa.
(4) firming body is broken：
The heavy metals immobilization body of flying dust in step (3) is crushed under 16 mesh sieve (grain size ＜ 1mm), flying dust powder is obtained.
(5) clinker cures：
Clinker is mixed with water, amount of water is the 70% of clinker quality, and slurries obtained stir homogeneous at 25 DEG C of room temperature
1d is cured.
(6) it spontaneously dries：
Step (5) clinker slurries after curing are spontaneously dried in ventilated environment, obtain caking caking.
(7) cake broke：
Furnace clinker in step (6) is crushed, it is broken to reach under 32 mesh sieve (grain size ＜ 0.5mm).
(8) mortar processed is mixed：
Flying dust broken material, clinker broken material, flyash, NaOH together water mixing are made and make mortar.Wherein, using II grade of powder
Coal ash.Mixed material mass ratio is flying dust broken material：Clinker broken material：Flyash：NaOH：Water=5:10:3:1.5:10.It fills
Divide stirring, is placed in mold.
(9) it conserves：
By mortar be placed in 75 DEG C, 25%RH (relative humidity) conserve 3 days after mold, brick is supported in this context again after die sinking
Shield 4 days conserves 7 days altogether.
(10) molding uses：
Brick through maintenance in 7 days can reach 10.1MPa, 11.3MPa, 10.6MPa.Leaching of Heavy Metals amount meets III class water body
Quality requirement (table 10).Building materials are for being laid with pavement road surface.
Leaching of Heavy Metals amount in 10 Chongqing Kaixian flying dust recycling brick product of table
Embodiment 6 utilizes domestic garbage incineration flyash and furnace slag brick making
Flying dust sample and g of slag sample content of beary metal and leaching in Shandong Dezhou garbage burning factory, flying dust sample
Amount is shown in Table 11.Leaching method reference《Solid waste Leaching leaching method horizontal vibration method》(HJ557-2010), limit value mark
Quasi- reference《Water environment quality standard》(GB3838-2002) V class water body standard in.As shown in Table 11, Pb, Zn, Cd are leached
It measures exceeded.
Content of beary metal and leaching content in 11 Shandong Dezhou garbage burning factory flying dust of table
Domestic garbage incineration flyash and furnace slag brick making are utilized according to flow chart shown in Fig. 1, is as follows：
(1) flying dust cures：
Flying dust is mixed with water, amount of water is the 70% of flying dust quality, and slurries obtained stir homogeneous at 25 DEG C of room temperature
2d is cured.
(2) heavy metal stabilization：
The Na of flying dust quality (dry ash) 3% is added in flying dust slurries after curing in step (1)2S's and 3%52.5#
Cement stirs homogeneous 15min, carries out the stabilisation of heavy metal under the conditions of 25 DEG C of room temperature.
(3) maintenance development：
Material after heavy metal stabilization in step (2) is conserved 2 under conditions of 25 DEG C, 98%RH (relative humidity)
It, obtains the heavy metals immobilization body of flying dust.Heavy metals immobilization body compression strength reaches 4.5MPa, 4.0MPa, 4.1MPa.
(4) firming body is broken：
The heavy metals immobilization body of flying dust in step (3) is crushed under 16 mesh sieve (grain size ＜ 1mm).
(5) clinker cures：
Clinker is mixed with water, amount of water is the 70% of clinker quality, and slurries obtained stir homogeneous at 25 DEG C of room temperature
1d is cured.
(6) it spontaneously dries：
Step (5) clinker slurries after curing are spontaneously dried in ventilated environment, obtain furnace clinker.
(7) cake broke：
Furnace clinker in step (6) is crushed, it is broken to reach under 32 mesh sieve (grain size ＜ 0.5mm).
(8) mortar processed is mixed：
Flying dust broken material, clinker broken material, flyash, NaOH together water mixing are made and make mortar.Wherein, using II grade of powder
Coal ash.Mixed material mass ratio is flying dust broken material：Clinker broken material：Flyash：NaOH：Water=5:10:5:2:10.Fully
Stirring, is placed in mold.
(9) it conserves：
By mortar be placed in 60 DEG C, 25%RH (relative humidity) conserve 3 days after mold, brick is supported in this context again after die sinking
Shield 4 days conserves 7 days altogether.
(10) molding uses：
Brick through maintenance in 7 days can reach 12.1MPa, 12.3MPa, 12.6MPa.Leaching of Heavy Metals amount meets III class water body
Quality requirement (table 12).Building materials are for being laid with pavement road surface.
Leaching of Heavy Metals amount in 12 Shandong Dezhou flying dust recycling brick product of table
Claims (10)
1. a kind of method using domestic garbage incineration flyash and furnace slag brick making includes the following steps：
(1) CaO in flying dust is cured；
(2) sulfur-containing compound and cement are added in the material after curing described in step (1), stirring homogeneous carries out heavy metal
It stabilizes；
(3) material after heavy metal stabilization described in step (2) is conserved, obtains the heavy metals immobilization body of flying dust；
(4) the heavy metals immobilization body of flying dust described in step (3) is crushed, obtains flying dust powder；
(5) CaO in clinker is cured；
(6) material after curing described in step (5) is dried, obtains furnace clinker；
(7) furnace clinker described in step (6) is crushed, obtains clinker powder；
(8) ash described in mixing step (4) flies clinker powder, flyash, NaOH and water described in powder, step (7), obtains sand
Slurry；
(9) mortar conserved, be molded, obtain brick.
2. according to the method described in claim 1, it is characterized in that：In step (1), the step of curing, is as follows：By flying dust
It is mixed with water, obtains flying dust slurries；Homogeneous is stirred to the flying dust slurries, completes the curing of CaO in the flying dust；
The quality of the water is the 50%~70% of the flying dust quality；
The temperature of the stirring homogeneous is 15~30 DEG C, and the time is 2~3d.
3. method according to claim 1 or 2, it is characterised in that：In step (2), the sulfur-containing compound is inorganic sulfur
Compound or organic sulfur compound；
The inorganic sulphide is Na2S；
The quality of the sulfur-containing compound is the 2%~3% of the flying dust dry ash quality；The quality of the cement is the flying dust
The 3%~5% of dry ash quality；
The temperature of the stirring homogeneous is 20~25 DEG C, and the time is 15min~30min.
4. method according to any one of claim 1-3, it is characterised in that：In step (3), the condition of the maintenance is such as
Under：Temperature is 20~25 DEG C, relative humidity ＞ 90%；The time of the maintenance is 2~3d；
The mechanical strength of the heavy metals immobilization body of the flying dust is 3~5MPa；
In step (4), the broken mesh number is less than 16 mesh.
5. according to the described method of any one of claim 1-4, it is characterised in that：In step (5), the step of the curing such as
Under：Clinker is mixed with water, obtains clinker slurries；Homogeneous is stirred to the clinker slurries, completes CaO in the clinker
Curing；
The quality of the water is the 50%~70% of the clinker quality；
The temperature of the stirring is 15~30 DEG C, and the time is 1~2d.
6. method according to any one of claims 1-5, it is characterised in that：In step (6), the drying is to divulge information
It is spontaneously dried in environment；
In step (7), the broken mesh number is less than 32 mesh.
7. according to the method described in any one of claim 1-6, it is characterised in that：In step (8), the flying dust powder, institute
The mass ratio for stating clinker powder, the flyash, the NaOH and the water is 5:10:(3~5):(0.5~2):10.
8. according to the described method of any one of claim 1-7, it is characterised in that：In step (9), the condition of the maintenance is such as
Under：Temperature is 60~75 DEG C, relative humidity ＜ 30%；The time of the maintenance is first to conserve 3d under the described conditions, is molded, then
4d is conserved under the described conditions；
Mechanical strength >=10MPa of the brick.
9. the building material brick that the method described in any one of claim 1-8 is prepared.
10. building material brick described in claim 9 is following 1) -4) at least one of in application：
1) municipal works are built；
2) it is laid with pavement road surface；
3) it is laid with curb；
4) flower bed or flower stand are laid with.
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Cited By (4)
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| CN112458290A (en) * | 2020-11-06 | 2021-03-09 | 金川集团股份有限公司 | Harmless treatment method for solid waste of nickel-containing iron slag |
| CN112456919A (en) * | 2020-12-15 | 2021-03-09 | 上海康恒环境股份有限公司 | Method for making bricks by mixing fly ash and slag |
| CN113213798A (en) * | 2021-06-10 | 2021-08-06 | 北京机械力化学研究院有限公司 | Waste incineration residue recycling system, fly ash bottom slag brick making and method thereof |
| CN113548842A (en) * | 2021-08-03 | 2021-10-26 | 光大环保技术研究院（深圳）有限公司 | Method for preparing baking-free brick by using ash |
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| CN112458290A (en) * | 2020-11-06 | 2021-03-09 | 金川集团股份有限公司 | Harmless treatment method for solid waste of nickel-containing iron slag |
| CN112456919A (en) * | 2020-12-15 | 2021-03-09 | 上海康恒环境股份有限公司 | Method for making bricks by mixing fly ash and slag |
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