CN109095799A - A kind of method that gangue coating modification prepares ecological aggregate - Google Patents
A kind of method that gangue coating modification prepares ecological aggregate Download PDFInfo
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- CN109095799A CN109095799A CN201810935085.0A CN201810935085A CN109095799A CN 109095799 A CN109095799 A CN 109095799A CN 201810935085 A CN201810935085 A CN 201810935085A CN 109095799 A CN109095799 A CN 109095799A
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- gangue
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1077—Cements, e.g. waterglass
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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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
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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
- C04B7/00—Hydraulic cements
- C04B7/32—Aluminous cements
- C04B7/323—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
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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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
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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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
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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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- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention provides a kind of method that gangue coating modification prepares ecological aggregate, carries out surface cladding, solidification to coal rhabdolith using solid waste base high-activity gelled material.The fast hard performance characteristics of high-activity gelled material Early strength quick-setting of the application based on solid waste base, coating modification is carried out to blocky gangue, a kind of gangue ecology aggregate is made, to reach and the comparable physical property of common stone, replace stone in the application market of various building materials fields, realizes a kind of extensive resource utilization new way of gangue.Step is simple and convenient to operate, is practical.
Description
Technical field
The invention belongs to the preparation field of New Building Materials, in particular to a kind of gangue coating modification prepares ecological bone
The method of material.
Background technique
Gangue is the solid waste discharged during coal mining process and coal washing, be one kind in coalification course with coal seam companion
A kind of lower, harder than the coal black and gray rock of raw phosphorus content.Including digging gangue, the mining process during tunnelling
In the spoil that is produced in top plate and bottom plate and interlayer and that chooses during coal washing wash spoil.Its main component is Al2O3、
SiO2, in addition also contain Fe in varying numbers2O3、CaO、MgO、Na2O、K2O、P2O5、SO3With carbon and micro rare element (gallium,
Vanadium, titanium, cobalt).
Gangue is the maximum industrial waste of China's discharge amount, accounts for about a quarter of China's industrial solid wastes.It is related
The material of department is shown, about 3,600,000,000 tons of gangue of the whole nation accumulative stockpiling over the years, larger hillock about 2600, is taken up an area
1.2 ten thousand hectares.With the development and the increasing of environmental protection work dynamics of China's modernization, the hair of clean coal technology
The raising of exhibition and mining mechanization level, the discharge amounts such as gangue, coal slime will also increase.
In recent years, with the rapid growth of coal production, 80,000,000 tons or so of gangue is increased newly every year.A large amount of bastard coal
Stone is thrown aside, and tract is not only taken up, and wastes large amount of land resources, and the sulfide evolution or leaching in gangue can also be dirty
Dye atmosphere, soil and water body, life and health to the mankind cause huge security risk.In addition, hillock can also spontaneous combustion hair
It lights a fire calamity, or in rainy season avalanche, silts river up and cause major disaster etc., for example table mountain coal on May 16th, 2005 occurs
Spontaneous combus tion of waste heap avalanche event causes 18 outside 100 meters resident rooms to be damaged in various degree, and for personnel by pile things on, 8 people are unfortunate in room
Wrecked, 6 people are severely injured, during speedily carrying out rescue work, because burst heavy rain causes hillock to erupt again, and cause live more than 40 people that speedily carry out rescue work
Member is burnt in various degree.A large amount of generations of coal gangue hill not only endanger ecological environment, more constitute to the life of the mankind and health
Harm.Therefore the research for needing to reinforce the basis such as component, structure and characteristic of gangue aspect, according to the characteristic and reality of gangue
Border needs, and develops new utilization ways, accelerates the comprehensive utilization paces of gangue.Gangue is applied to pavement material, Ke Yishi
Existing the innoxious of solid waste, minimizing and recycling, have significant economic benefit, social benefit and environmental benefit, have
Prospect and important meaning well.
Currently, the comprehensive utilization ratio of China's gangue is 75% or so, due to its huge yield and volume of cargo in storage, every year
It is urgently handled there are also a large amount of coal gangue hill.China has much for the research of gangue, is built using gangue as manufacture
The raw material of material, not only simple process, and dosage is big can be all of being the main path that gangue utilizes.Including coal
Making brick from coal deads, it is coal gangue modified to produce spoil brick hollow brick, and fuel is not needed using making coal gangue brick, realize brickmaking
Without clay, the effect baked bricks without fuel.Achieve good environment and economic benefit, but due to environmental issue, at present state
Family has forbidden the production of fired brick, and non-burning brick gangue is development trend.There are also manufacturing cement by using gangue, concrete.Ceramics etc.
Research and application, in addition there are also research gangues to make adsorbent etc. at present.
The development and utilization of natural gravel are restricted at present, in terms of current lime stone conditions of demand both at home and abroad, entirely
The every annual requirement in the world is about 1,200,000,000 tons or so, but 80% is general applications.Fat lime is because resource is few, low output, and market lacks
Mouth is larger.In recent years, Asian-Pacific area various countries, every year will be from Chinese import lime stone 1,100,000 because of its domestic limestone resource deficiency
Ton or so.According to scholarly forecast, to the demand of fat lime stone, the country will with annual 300000 tons, the Asian-Pacific area will be with annual 35
Ten thousand tons of speed increases.
The price of stone is also to be in a higher level at present, more than 100 yuan/ton.And it is coal gangue modified after do
Aggregate can achieve the comparable performance requirement of stone and low in cost, if using gangue as a kind of aggregate apply building,
The various fields such as building materials, road construction.Gangue is set to turn waste into wealth, present stone is expensive to ask then not only can solve
Topic, can also solve the problems, such as gangue bring ecological pollution.The attached of gangue can be reapplied to realize, greatly improve coal
The comprehensive utilization ratio of spoil, hews out a kind of new way that gangue utilizes on a large scale, can more replace the huge need of part stone
Market is asked, good economy and environmental benefit can be brought for enterprise and society.Meet China to promote a conservation culture, development green
The new demand of circular economy.
Summary of the invention
In order to overcome above-mentioned deficiency, the present invention provides a kind of high-activity gelled material of solid waste base, is based on its Early strength quick-setting
Fast hard performance characteristics carry out coating modification to blocky gangue and a kind of gangue ecology aggregate are made, to reach and common stone
The comparable physical property of son, replaces stone in the application market of various building materials fields, realizes a kind of extensive recycling of gangue
Utilize new way.
To achieve the goals above, the present invention adopts the following technical scheme:
The purpose of the present invention one is to provide a kind of method that gangue coating modification prepares ecological aggregate, comprising:
Using solid waste base high-activity gelled material to coal rhabdolith carry out surface cladding, solidification to get.
Preferably, the solid waste base high-activity gelled material is arranged in pairs or groups the iron-based solid waste of other sial and calcium sulphate-based by gangue
A kind of hydraulic cementing materials obtained by the calcining of solid waste cooperative compensating, it is specific the preparation method is as follows:
1) first the gangue of bulk is crushed, partial size is then greater than 25mm and screens out lower than 5mm gangue, left
Partial size 5-25mm gangue is spare；
2) grind the gangue coordinated desulfurization gypsum greater than 25mm and less than 5mm tailed over, aluminium ash, electroslag stone process,
It is calcined after mixing to get solid waste base high-activity gelled material.
The gangue, desulfurized gypsum, aluminium ash, carbide slag ratio be (mass percent) 20%:20%:30%:
30%.
In the preparation method of the cementitious material, calcination temperature is 1250 DEG C, time 2h.
Preferably, the particle size of the gangue is 5-25mm.
Preferably, the mass ratio of the solid waste base high-activity gelled material and gangue is 1-2:8~9.
Preferably, the ratio of mud is between 0.28-0.32.
Preferably, the solid waste base high-activity gelled material crosses 0.08mm square hole screen.
Preferably, the cladding is using using collar plate shape pelletizer；Disk rotation under motor drive drives coal gangue block
Rotation, rotation while, spray water, and then spray solid waste based cementitious material powder again to gangue surface wettability；Until gangue table
Bread covers the shell of one layer of even compact.
There is provided the ecological aggregates of any above-mentioned method preparation for the purpose of the present invention two.
Application of the purpose of the present invention three there is provided above-mentioned ecological aggregate in building, building materials, road construction.
Beneficial effects of the present invention
1) present invention can prepare a kind of bastard coal ground mass ecology aggregate, the following city that stone can be replaced to do aggregate on a large scale
?.
2) production cost can be greatly reduced compared with current stone does aggregate expense in the present invention.
3) use intensity and durability of gangue can be improved in the present invention.
4) gangue aggregate prepared by the present invention reaches and the comparable physical property of ordinary gravel.
5) present invention makes gangue do aggregate stabilisation, innoxious and recycling to a greater degree.
6) gangue ecology aggregate prepared by the present invention is at low cost, intensity is high, stability is high, crush values are low, durable
Property excellent equal places.Wide market.Through detecting, the gangue aggregate of preparation be averaged crush values be 8.6% < 10%.Meet
The requirement of national sector standard " JGJ52-2006 " index of correlation；Water absorption rate 1.8% < 2.0%.Meet national standard " GB/
T14685-2011 " index of correlation requirement.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is process flow chart of the invention.
Fig. 2,3 are the gangue of the cladding processing of embodiment 1, gangue (partial size 5-25mm) the directly work with uncoated processing
Aggregate and common stone (partial size 5-25mm) make the concrete strength result of aggregate.
Fig. 4,5 be the gangue of the cladding processing of embodiment 2, directly do with the gangue (partial size 5-25mm) of uncoated processing
Aggregate and common stone (partial size 5-25mm) do the concrete strength result of aggregate.
Fig. 6,7 be the gangue of the cladding processing of embodiment 3, directly do with the gangue (partial size 5-25mm) of uncoated processing
Aggregate and common stone (partial size 5-25mm) do the concrete strength result of aggregate.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Gangue is as a kind of trade waste, the feature with high-strength light, can be used as by simple crushing, screening
Gather materials concrete batching.Aggregate with bastard coal masonry concrete is the reasonable approach using gangue, utilizes gangue compared with other
Method it is more abundant, thoroughly, and its economic benefit is also significant.By the property of hoof choosing treated gangue and rubble
Matter has many similarities, due to gangue complicated component, since gangue contains SiO2、Al2O3Amount is high, belongs to active constituent, long
Phase and water, Ca (OH)2Alkali-aggregate reaction easily occurs with contacts such as air, gangue powder phenomenon-tion occurs, reduces gangue intensity.
Meanwhile short texture after gangue dusting, porosity increase, and lead to that structure water absorption is excessive, causes durability bad.Therefore,
Gangue directly can not do aggregate production concrete instead of stone at present, and being primarily due to it can cause quality to be asked as aggregate
Topic especially limits its application in terms of durability, so the present invention is by a kind of homemade solid waste base high-activity gelled material
To the processing of coal rhabdolith surface cladding, so as to improve the structure of the interfacial transition zone between gangue aggregate and slurry, in gangue
The shell that a kind of hard and compact is formed between aggregate and slurry prevents the moisture of slurry and air from entering hair inside gangue aggregate
Biochemical reaction prevents gangue aggregate dusting, to improve structural strength and durability.
Firstly, gangue cladding process speed it is fast, it is high-efficient, be evenly coated.Secondly solid waste based cementitious material used is coated
Hardening is fast, and intensity is high, and aggregate intensity greatly improves after cladding.The specific method is as follows:
Firstly, being generally more than 50mm or more by the blocky gangue partial size that coal mining factory obtains.It needs to be broken into through crusher
The blocky-shaped particle of 5-25mm granule size, then with the screening plant of standard the bulk or powder greater than 25mm and lower than 5mm
End screening is fallen.The gangue for the gradation that meets the requirements after screening claims a certain amount to put in the disk of granulating disc a kind of to allow it with circle
Disc spins roll (speed frequency conversion is adjustable), sprinkle water while rotating, and it is solid that quantitative self-control is sprayed after gangue surface wettability
Useless based active material powder, sprinkles water while spraying powder, takes out after gangue surface uniformly coats one layer of active material
Room temperature dries to obtain a kind of gangue ecology aggregate.(homemade solid waste based active material is iron-based solid by gangue other sial of arranging in pairs or groups
A kind of hydraulic cementing materials obtained by the calcining of useless and calcium sulphate-based solid waste cooperative compensating.)
Object of the present invention is to handle gangue to obtain a kind of new property ecology aggregate.Obtain it greatly in the field of building materials
Scale money cyclisation utilizes.
Heretofore described gangue is the nonflammable gangue of coal mining factory discharge.
Heretofore described gangue particle size 5-25mm.
Heretofore described solid waste based cementitious material is self-control production, and cost is less than 300 yuan/ton
It is that gangue is arranged in pairs or groups other several solid waste cooperative compensatings that heretofore described solid waste based cementitious material, which prepares raw material,
Low-firing forms.It is specific the preparation method is as follows:
1) first the gangue of bulk is crushed, partial size is then greater than 25mm and screens out lower than 5mm gangue, left
Partial size 5-25mm gangue is spare；
2) grind the gangue coordinated desulfurization gypsum greater than 25mm and less than 5mm tailed over, aluminium ash, electroslag stone process,
It is calcined after mixing to get solid waste base high-activity gelled material.
The gangue, desulfurized gypsum, aluminium ash, carbide slag ratio be (mass percent) 20%:20%:30%:
30%.
In the preparation method of the cementitious material, calcination temperature is 1250 DEG C, time 2h.
The specific surface area of the solid waste based cementitious material is 400~450kg/m2。
Using the control of 0.08mm square hole screen percentage of sieve residue below 3%.
Preferably, in terms of mass parts, solid waste based cementitious material dosage is in 10%-20% and blocky gangue ratio in 1:9-
2:8。
It is further preferred that water consumption and the cementitious material ratio of mud are between 0.28-0.32.
It is further preferred that the coating equipment uses a kind of collar plate shape pelletizer.Disk rotates band under motor drive
Dynamic coal gangue block rotation, rotation while, spray water, and then spray solid waste based cementitious material powder again to gangue surface.Until coal
Spoil surface coats the shell of one layer of even compact.
This method simple process, equipment are reliable, safe and scientific, it can be achieved that the attached energy recycling of gangue, opens up a kind of bastard coal
Stone further increases gangue utilization rate to realize the extensive resource utilization of Coal Gangue Resource using new way.To
Huge environmental benefit, economic benefit and social benefit can be generated.
Below with reference to specific embodiment, the present invention is described further.
In following embodiment, (self-control) solid waste based active material powder is prepared with the following method:
1) first the gangue of bulk is crushed, partial size is then greater than 25mm and screens out lower than 5mm gangue, left
Partial size 5-25mm gangue is spare；
2) grind the gangue coordinated desulfurization gypsum greater than 25mm and less than 5mm tailed over, aluminium ash, electroslag stone process,
Calcine after mixing to get.
The gangue, desulfurized gypsum, aluminium ash, carbide slag ratio be (mass percent) 20%:20%:30%:
30%.
In the preparation method of the cementitious material, calcination temperature is 1250 DEG C, time 2h.
3) above-mentioned aluminium sulfate cementitious material is crossed into 0.08mm square hole screen to get solid waste based active material powder.
Embodiment 1:
It is prepared using above-mentioned processing step, design parameter, calculated result and detection are as follows: with each material quality
Meter, 1:9:0.28 configuration weighs in proportion for solid waste based active material powder, partial size 5-25mm gangue, tap water.It will claim first
Measured bulk gangue, which is placed in pelletizer disk, allows it to roll with disc rotary.Then it injects in water sprager and weighs in proportion
Gauge water spray the solid waste based cementitious material powder that weighs in proportion after gangue surface wettability.Powder one is sprayed on one side
Side watering.Naturally dry is taken out after water is sprayed, and the gangue ecology aggregate that surface is evenly coated is made.Gained gangue
Aggregate product particle diameter 5-25mm, bulk density 1.28kg/m3, apparent density 2830kg/m3, meet index of correlation, through common
It is 12.6% < 20% that Sand for Concrete, stone quality and test method standard (JGJ52-2006), which measure average crush values,.Meet state
Family's mark construction GB/T14685-2011 intensity index requirement.The gangue ecology aggregate of preparation configures concrete by label C30
(cementitious material used in configuration concrete is homemade solid waste based cementitious material, has the characteristics that early-strong-fast-hard, therefore 3 days pressure resistances
Spend higher), and aggregate is directly done with the gangue (partial size 5-25mm) of uncoated processing and common stone (partial size 5-25mm) is done
Aggregate compares, and concrete strength result is as shown in Figure 2 and Figure 3.The result shows that than untreated after the processing of gangue surface cladding
Gangue does 3 days intensity of aggregate and is higher by 4.4MPa.And stable long-term strength growth reaches 35.3MPa, meets design grade requirement,
It is almost consistent that intensity is compared with the common stone concrete of same label.It is not in that later period gangue directly does aggregate later strength
The phenomenon that decline.
Embodiment 2:
It is prepared using above-mentioned processing step, design parameter, calculated result and detection are as follows: with each material quality
Meter, 1:8.5:0.29 configuration weighs in proportion for solid waste based active material powder, partial size 5-25mm gangue, tap water.First will
Load weighted bulk gangue, which is placed in pelletizer disk, allows it to roll with disc rotary.Then it injects in water sprager and claims in proportion
The gauge water taken sprays the solid waste based cementitious material powder weighed in proportion after gangue surface wettability.Powder is sprayed on one side
It sprinkles water on one side.Naturally dry is taken out after water is sprayed, and the gangue ecology aggregate that surface is evenly coated is made.Gained bastard coal
Stone aggregate product particle diameter 5-25mm, bulk density 1.30kg/m3, apparent density 2880kg/m3, meet index of correlation.Through general
It is 9.6% < 10% that logical Sand for Concrete, stone quality and test method standard (JGJ52-2006), which measure the intensity crush values that be averaged,.
Meet national sector standard index request.The gangue ecology aggregate of preparation is by label C30 configuration concrete (configuration concrete institute
With cementitious material be homemade solid waste based cementitious material, have the characteristics that early-strong-fast-hard, therefore 3 days compression strength is higher), and with not
The gangue (partial size 5-25mm) of cladding processing directly does aggregate and common stone (partial size 5-25mm) does aggregate and compares, coagulation
Native intensity results are as shown in Figure 4, Figure 5.The result shows that doing aggregate 3 days than untreated gangue after the processing of gangue surface cladding
Intensity is higher by 4.6MPa, and stable long-term strength increases up to 35.5MPa, meets design grade requirement, compares the common stone of same label
Sub- concrete strength is almost consistent.It is not in the phenomenon that later period gangue directly does the decline of aggregate later strength.
Embodiment 3:
It is prepared using above-mentioned processing step, design parameter, calculated result and detection are as follows: with each material quality
Meter, 1:8:0.3 configuration weighs in proportion for solid waste based active material powder, partial size 5-25mm gangue, tap water.It will weigh first
Good blocky gangue, which is placed in pelletizer disk, allows it to roll with disc rotary.Then it is injected in water sprager weighed in proportion
Gauge water sprays the solid waste based cementitious material powder weighed in proportion after gangue surface wettability.. while spraying powder
Watering.Naturally dry is taken out after water is sprayed, and the gangue ecology aggregate that surface is evenly coated is made.Gained gangue bone
Expect product particle diameter 5-25mm, bulk density 1.33kg/m3, apparent density 2920kg/m3, meet index of correlation.Commonly mixed
It is 8.6% < 10% that solidifying soil sand, stone quality and test method standard (JGJ52-2006), which measure average crush values,.Meet country
Professional standard index request.The gangue ecology aggregate of preparation is by label C30 configuration concrete (the configuration concrete material used that is gelled
Material be homemade solid waste based cementitious material, have the characteristics that early-strong-fast-hard, therefore 3 days compression strength is higher), and with uncoated processing
Gangue (partial size 5-25mm) directly do aggregate and common stone (partial size 5-25mm) does aggregate and compares, concrete strength knot
Fruit is as shown in Figure 6, Figure 7.It is higher by the result shows that doing 3 days intensity of aggregate than untreated gangue after the processing of gangue surface cladding
4.2MPa.And stable long-term strength growth reaches 35.7MPa, meets design grade requirement, with the common stone concrete of same label
It compares intensity and has and slightly increase.It is not in the phenomenon that later period gangue directly does the decline of aggregate later strength.
Finally it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not limited to this hair
It is bright, although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still
It can modify to technical solution documented by previous embodiment, or part is equivalently replaced.It is all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not to the scope of the present invention
Limitation, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not required to
Make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of method that gangue coating modification prepares ecological aggregate characterized by comprising
Using solid waste base high-activity gelled material to coal rhabdolith carry out surface cladding, solidification to get；
The solid waste base high-activity gelled material is prepared with the following method:
1) first the gangue of bulk is crushed, partial size is then greater than 25mm and screens out lower than 5mm gangue；
2) will screen out come be greater than 25mm and gangue coordinated desulfurization gypsum less than 5mm, aluminium ash, electroslag stone by grinding,
It is calcined after mixing to get solid waste base high-activity gelled material；
The gangue, desulfurized gypsum, aluminium ash, carbide slag mass ratio be 2~3:2~3:3~4:3~4；
In the preparation method of the cementitious material, calcination temperature is 1250~1300 DEG C, and the time is 1.8~2h.
2. the method as described in claim 1, which is characterized in that the calcination temperature 1250 of the solid waste base high-activity gelled material
DEG C, time 2h.
3. the method as described in claim 1, which is characterized in that in the solid waste base high-activity gelled material, gangue, desulfurization
Gypsum, aluminium ash, carbide slag mass percent be 20%:20%:30%:30%, with the total weight of raw material.
4. the method as described in claim 1, which is characterized in that the particle size of the gangue is 5-25mm.
5. the method as described in claim 1, which is characterized in that the quality of the solid waste base high-activity gelled material and gangue
Than for 1-2:8~9.
6. the method as described in claim 1, which is characterized in that the ratio of mud is between 0.28-0.32.
7. the method as described in claim 1, which is characterized in that the solid waste based cementitious material crosses 0.08mm square hole screen.
8. the method as described in claim 1, which is characterized in that the cladding is using using collar plate shape pelletizer；Disk is in electricity
Machine drives lower rotation to drive coal gangue block rotation, and rotation while sprays water, and then sprays solid waste base again to gangue surface wettability
Cementitious material powder；Until gangue surface coats the shell of one layer of even compact.
9. the ecological aggregate of the described in any item method preparations of claim 1-8.
10. application of the ecology aggregate as claimed in claim 9 in building, building materials, road construction.
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