CN110282925A - Artificial porous aggregate of a kind of carbonization steel slag and preparation method thereof - Google Patents
Artificial porous aggregate of a kind of carbonization steel slag and preparation method thereof Download PDFInfo
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- CN110282925A CN110282925A CN201910553298.1A CN201910553298A CN110282925A CN 110282925 A CN110282925 A CN 110282925A CN 201910553298 A CN201910553298 A CN 201910553298A CN 110282925 A CN110282925 A CN 110282925A
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- slag
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- 239000002893 slag Substances 0.000 title claims abstract description 196
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 162
- 239000010959 steel Substances 0.000 title claims abstract description 162
- 238000003763 carbonization Methods 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 40
- 238000009628 steelmaking Methods 0.000 claims abstract description 35
- 239000010881 fly ash Substances 0.000 claims abstract description 14
- 238000000227 grinding Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011398 Portland cement Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000011449 brick Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 8
- 239000006227 byproduct Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 210000000988 bone and bone Anatomy 0.000 claims description 4
- 239000000047 product Substances 0.000 claims description 2
- 239000004567 concrete Substances 0.000 abstract description 34
- 238000012423 maintenance Methods 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 239000001569 carbon dioxide Substances 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000001879 gelation Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000003895 organic fertilizer Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000004058 oil shale Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- C04B18/00—Use 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
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/0231—Carbon dioxide hardening
- C04B40/0236—Carbon dioxide post-treatment of already hardened material
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/0277—Hardening promoted by using additional water, e.g. by spraying water on the green concrete element
- C04B40/0281—Hardening in an atmosphere of increased relative humidity
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Artificial porous aggregate of a kind of carbonization steel slag and preparation method thereof, belongs to industrial residue utilization technical field.The preparation method is as follows: the preparation of steel-making slag powder: being crushed to steel slag block, obtained broken steel slag is put into grinding machine and is ground into steel-making slag powder；Steel slag ball aggregate processing: the mixing of at least one of steel-making slag powder, portland cement, brick powder and flyash is weighed, adds water balling-up, obtains spherical steel slag aggregate；Aggregate pretreatment: precuring is carried out to spherical steel slag aggregate；The carbonization of steel slag aggregate: the spherical steel slag aggregate after precuring being put into carbonization kettle and is carbonized, and obtains the carbonization artificial porous aggregate of steel slag.The advantages that artificial porous aggregate of carbonization steel slag prepared by the present invention has aggregate intensity height, and safety and stability, preparation process and equipment are simple, and easy to operate, production cost is low, high-efficient, low-carbon environment-friendly.Can meet the needs of concrete is to aggregate intensity while provide interior maintenance for concrete, reduce concrete self-shrinkage, improve frost resistance.
Description
Technical field
The invention belongs to industrial residue utilization technical fields, and in particular to a kind of artificial porous aggregate of carbonization steel slag and its system
Preparation Method.
Background technique
Steel slag is a kind of industry byproduct for generating in steelmaking process, but since the gelation activity of steel slag is low, free CaO and
Content of MgO is high, will lead to that it is poor as cementitious material stability, easily leads to concrete expansion and cracks etc., greatly limits steel slag
Volume in building materials application.In China, steel slag annual emissions are more than 100,000,000 tons, but because the whole utilization of steel slag is horizontal
Not high, a lot of steel slag is stored up, and wherein harmful metal elements can enter soil, pollutes arable soil resource, while steel slag is accumulated
Occupy arable land.Carbonization is used as novel steel slag processing means, can consume most free metal oxides in the preparation, more
The gelation activity for efficiently utilizing steel slag, solves steel slag stability bad hidden danger, the problem of gelling property difference.
In recent years, due to being built between the demand to concrete and its raw material and natural resources shortage on a large scale
Contradiction is more obvious.Natural sand stone aggregate resources are in short supply, are badly in need of finding new sandstone aggregate source.
Due to flourishing for steel industry, the yield of byproduct steel slag is high, and environmental quality is deeply hurt.?
There is a small amount of patent to propose resolving ideas for this problem.The patent application of Publication No. CN105294039A discloses one kind
Steel slag plant-growing concrete proposes that, using steel slag aggregate, steel slag composite powder and reinforcing agent prepare concrete for plant growth, the patent requirements steel
The content of slag raw material free calcium oxide is less than 2%, but the ingredient fluctuation of steel slag is big, it is difficult to ensure free calcium oxide in steel slag contains
Amount control is within 2%.The patent application of Publication No. CN103864326A discloses a kind of steel slag aggregate and preparation method thereof,
It cooperates using steel slag and cinder, lime, saltcake, and the mixture of drying is placed in 1260-1360 DEG C of environment and is calcined simultaneously
4h is kept the temperature, finally obtains the steel slag aggregate with gelation activity, crush index can achieve 12%, molding using this aggregate
Concrete can achieve the requirement of C30 concrete in the compression strength of 28d, which needs to calcine mixture at high temperature,
The aggregate for C30 concrete can be obtained, energy consumption is high, considers that aggregate dosage is big, economy is poor, it is difficult to large-scale industry
Change.The patent application of Publication No. CN108794282A discloses a kind of efficiency slow release fashioned iron slag aggregate based on carbonating maintenance
Preparation method, steel slag is specifically used to prepare efficiency slow release type aggregate.The patent application is using organic fertilizer as core, in fertilizer
Material is external to be wrapped steel-making slag powder and sprays water, and obtains including the steel slag ball of organic fertilizer by granulation, and final carbonization obtains finished aggregate,
After carbonization, the heavy metal of aggregate filters out mitigation, and the compression strength of aggregate can achieve 3.5-5.0MPa, it is difficult to meet conventional
The requirement of concrete and high-strength concrete to aggregate quality.The patent of Publication No. CN106746814A discloses a kind of steel slag
Aggregate processing method.Steel slag block is crushed and screens to obtain the steel block slag that partial size is 18-25mm by the invention, in certain condition
Lower carbonization, recycles paper sludge, lime, and the mixture that oil shale waste cooperates wraps up steel slag block, is placed in pressure again later
The CO of 4-6MPa2Under atmosphere, 40-60 DEG C of temperature, be carbonized in the environment of relative humidity 60-95% 20-50min, last aggregate
Crush index preferably can achieve 12.7%.Steel slag block size is big in the technology, it is difficult to which carbonization sufficiently, it is bad hidden to have stability
Suffer from, and process-intensive, CO2Pressure is high, needs to compress high pressure CO2, the high requirements on the equipment increases production cost.
Summary of the invention
The technical issues of solution: for steel slag aggregate intensity existing in the prior art is high, stability bad hidden danger, at
The problems such as this height, complex procedures, technical matters require height, are difficult to large-scale industrial production and promote and apply, the present invention provides
Artificial porous aggregate of a kind of carbonization steel slag and preparation method thereof has aggregate intensity height, safety and stability, preparation process and equipment letter
The advantages that single, easy to operate, production cost is low, high-efficient, low-carbon environment-friendly.
Technical solution: a kind of preparation method for the artificial porous aggregate of steel slag that is carbonized the described method comprises the following steps:
The preparation of step 1 steel-making slag powder: being crushed steel slag block, and obtained broken steel slag is put into grinding machine, ratio is milled to
Surface area is 100-280m2The steel-making slag powder of/g；
Step 2 steel slag ball aggregate processing: the steel-making slag powder of 30-100 mass parts, the silicate cement of 5-20 mass parts are weighed
The mixing of at least one of mud, the brick powder of 0-60 mass parts and flyash obtains spherical steel slag by the ratio of mud 0.19 plus water balling-up
Aggregate；
The pretreatment of step 3 aggregate: precuring is carried out to the spherical steel slag aggregate that step 2 obtains, keeps environment relatively wet
Degree is 40-98%, and temperature is 20-60 DEG C, conserves 0-7d；
The carbonization of step 4 steel slag aggregate: the spherical steel slag aggregate after precuring is put into carbonization kettle, being passed through concentration is
The CO of 5-100vt.%2, pressure 0.052-1MPa, control carbonization time is 0.5-72h, obtains carbonization steel slag manually porous bone
Material.
Preferably, steel slag block raw material is the byproduct steel slag in steelmaking process in the step 1.
Preferably, obtained broken steel slag is put into grinding machine in the step 1, being milled to specific surface area is 260m2/ g's
Steel-making slag powder.
Preferably, weighing 60 mass parts steel-making slag powders, 10 mass parts portland cements, 30 mass parts powder in the step 2
Coal ash mixing.
Preferably, keeping envionmental humidity in the step 3 is 80%, temperature is 20 DEG C, conserves 4d.
Preferably, being passed through the CO that concentration is 99.9vt.% in the step 42, pressure 0.4MPa, when control is carbonized
Between be 8h.
The artificial porous aggregate of carbonization steel slag of above method preparation.
The utility model has the advantages that 1) primary raw material of the invention used is steel slag, flyash, carbon dioxide etc., steel slag accumulation waste
Land resource, flyash, using limited in building materials, prevent it from being efficiently treated since gelling is poor.The present invention couple
Traditional industry is difficult to the solid waste digested and carries out resource utilization.Carbon dioxide is not easy after trapping as greenhouse gases
Storage, or high cost is needed to be handled, the present invention seals carbon dioxide in steel slag up for safekeeping to a certain extent, prevents
Carbon dioxide release aggravates the degree of greenhouse effects in air.
2) the invention belongs to porous aggregates, and the quality of concrete can be effectively reduced, and can provide after water suction for concrete
Interior maintenance action promotes the later strength of concrete, reduces concrete early stage volume contraction, specific visible Fig. 3.In addition, in day
Under the main trend of right aggregate resources shortage, it can be mitigated using the artificial porous aggregate substitution of carbonization steel slag of the present invention to natural
The dependence of sandstone aggregate.
3) steel slag aggregate of the invention has excellent water retention property, the self-constriction volume occur to concrete formation early stage
Deformation has significant reduction effect, prevents concrete early stage from cracking, and guarantees that cement can not during long-term aquation
It is disconnected that moisture is obtained from aggregate, the intensity of concrete is improved, highest can achieve 53.8MPa, can expire higher than prior art highest
The intensity requirement of the C30 of foot.
The present invention utilizes the active material in carbon dioxide and steel slag such as calcium oxide, hydrogen using carbonization technical treatment steel slag
The calcium-magnesium-containings mine such as calcium oxide, calcium silicates is equal to be reacted, and is consumed expansion component, is prepared high strength carbonizing steel slag aggregate.This hair
The alternative materials that bright carbonization steel slag aggregate can be used as natural aggregate prepare concrete material, and it is stable not only to can solve steel slag
The problem of property bad hidden danger and gelling property difference, can also provide interior maintenance, reduce the self-constriction of concrete.The steel slag that is carbonized is artificial
The pressure that current aggregate industry is faced can be effectively relieved in aggregate processing, promote resource circulation utilization, push green building material
Development.
Detailed description of the invention
Fig. 1 is the preparation flow figure of the present invention carbonization artificial porous aggregate of steel slag；
Fig. 2 is concrete crushing strength schematic diagram in embodiment 1-3 and comparative example 3；
Fig. 3 is that the self-constriction of aggregate in embodiment 1-3 and comparative example 3 deforms schematic diagram；
Fig. 4 is the microscopic appearance of the carbonization artificial porous aggregate of steel slag in embodiment 1；
Fig. 5 is the pictorial diagram of the carbonization artificial porous aggregate of steel slag in embodiment 1；
Fig. 6 is the carbonization artificial porous aggregate of steel slag aspect graph after pressure is steamed in embodiment 1；
Fig. 7 is the artificial porous aggregate of steel slag that the is not carbonized aspect graph after pressure is steamed in comparative example 1.
Specific embodiment
The invention will be further described in the following with reference to the drawings and specific embodiments.
Embodiment 1
It is a kind of be carbonized the artificial porous aggregate of steel slag preparation method the described method comprises the following steps referring to Fig. 1: to steel
Clinker is crushed, and obtained broken steel slag block is put into grinding machine, and wearing into specific surface area is 200m2The steel-making slag powder of/g, weighs 60
The steel-making slag powder of mass parts, 10 mass parts portland cements and the mixing of 30 mass parts flyash, with the quality ratio of mud 0.19 plus water at
Ball obtains spherical steel slag aggregate；Then to spherical steel slag bone obtained above under conditions of relative humidity 50%, 30 DEG C of temperature
Expect precuring 72h.After the completion of maintenance, will there is the spherical steel slag aggregate for the pre- structure that is carbonized to be put into carbonization kettle, be passed through
The carbon dioxide of 99.9vt.% concentration, be carbonized 8h under the pressure of 0.1MPa, obtains the carbonization artificial porous aggregate of steel slag, is denoted as
S1, and this aggregate formation of concrete is used, obtain carbonization steel slag aggregate concrete.The steel slag aggregate prepared in the present embodiment it is micro-
See shape appearance figure referring to fig. 4, for pictorial diagram referring to Fig. 5, S1 presses the aggregate appearance ginseng steamed and obtained in the environment of 216 DEG C, pressure 2MPa
See Fig. 6, it can be seen from the figure that carbonization steel slag aggregate is intact after over-voltage is steamed, is not crushed.
Embodiment 2
A kind of preparation method for the artificial porous aggregate of steel slag that is carbonized, the described method comprises the following steps: carrying out to steel slag block
It is broken, obtained broken steel slag is put into grinding machine, being milled to specific surface area is 260m2The steel-making slag powder of/g；Weigh 40 mass parts steel slags
Powder, 20 mass parts portland cements and the mixing of 40 mass parts flyash obtain spherical steel with the quality ratio of mud 0.19 plus water balling-up
Slag aggregate；Then to spherical steel slag aggregate precuring 48h obtained above under conditions of relative humidity 50%, 20 DEG C of temperature.
After the completion of maintenance, will there is the spherical steel slag aggregate for the pre- structure that is carbonized to be put into carbonization kettle, be passed through the dioxy of 100vt.% concentration
Change carbon, be carbonized 72h under the pressure of 0.1MPa, obtains the carbonization artificial porous aggregate of steel slag, is denoted as S3, and form using this aggregate
Concrete obtains carbonization steel slag aggregate concrete.
Embodiment 3
A kind of preparation method for the artificial porous aggregate of steel slag that is carbonized, the described method comprises the following steps: carrying out to steel slag block
It is broken, obtained broken steel slag is put into grinding machine, being milled to specific surface area is 260m2The steel-making slag powder of/g；Weigh 40 mass parts steel slags
Powder, 10 mass parts portland cements and the mixing of 50 mass parts flyash obtain spherical steel with the quality ratio of mud 0.19 plus water balling-up
Slag aggregate；Then under conditions of relative humidity 60%, 20 DEG C of temperature to spherical steel slag aggregate precuring obtained above for 24 hours.
After the completion of maintenance, will there is the spherical steel slag aggregate for the pre- structure that is carbonized to be put into carbonization kettle, be passed through the titanium dioxide of 40vt.% concentration
Carbon, be carbonized 4h under the pressure of 1MPa, obtains carbonization steel slag aggregate, is denoted as S6, and use this aggregate formation of concrete, obtains carbon
Change steel slag aggregate concrete.
Embodiment 4
A kind of preparation method for the artificial porous aggregate of steel slag that is carbonized, the described method comprises the following steps:
The preparation of step 1 steel-making slag powder: being crushed steel slag block, and obtained broken steel slag is put into grinding machine, ratio is milled to
Surface area is 100m2The steel-making slag powder of/g, wherein steel slag block raw material is the byproduct steel slag in steelmaking process.
Step 2 steel slag ball aggregate processing: the steel-making slag powder of 30 mass parts and the portland cement of 5 mass parts are weighed, is pressed
The ratio of mud 0.19 plus water balling-up, obtain spherical steel slag aggregate.
The carbonization of step 3 steel slag aggregate: spherical steel slag aggregate is put into carbonization kettle, and being passed through concentration is 5vt.%'s
CO2, pressure 0.052MPa, control carbonization time is 72h, obtains the carbonization artificial porous aggregate of steel slag.
Embodiment 5
A kind of preparation method for the artificial porous aggregate of steel slag that is carbonized, the described method comprises the following steps:
The preparation of step 1 steel-making slag powder: being crushed steel slag block, and obtained broken steel slag is put into grinding machine, ratio is milled to
Surface area is 280m2The steel-making slag powder of/g, wherein the steel slag block raw material is the byproduct steel slag in steelmaking process.
Step 2 steel slag ball aggregate processing: the steel-making slag powder of 100 mass parts, the portland cement of 20 mass parts, 60 are weighed
The brick powder and mixture of fly ash (mass ratio of brick powder and flyash is 1:1) of mass parts, by the ratio of mud 0.19 plus water balling-up, obtain
To spherical steel slag aggregate.
The pretreatment of step 3 aggregate: precuring is carried out to the spherical steel slag aggregate that step 2 obtains, keeps environment relatively wet
Degree is 98%, and temperature is 60 DEG C, conserves 7d.
The carbonization of step 4 steel slag aggregate: the spherical steel slag aggregate after precuring is put into carbonization kettle, being passed through concentration is
The CO of 100vt.%2, pressure 1MPa, control carbonization time is 0.5h, obtains the carbonization artificial porous aggregate of steel slag.
Embodiment 6
A kind of preparation method for the artificial porous aggregate of steel slag that is carbonized, the described method comprises the following steps:
The preparation of step 1 steel-making slag powder: being crushed steel slag block, and obtained broken steel slag is put into grinding machine, ratio is milled to
Surface area is 260m2The steel-making slag powder of/g, wherein steel slag block raw material is the byproduct steel slag in steelmaking process.
Step 2 steel slag ball aggregate processing: the steel-making slag powder of 60 mass parts, the portland cement of 10 mass parts, 30 are weighed
Mass parts flyash obtains spherical steel slag aggregate by the ratio of mud 0.19 plus water balling-up.
The pretreatment of step 3 aggregate: precuring is carried out to the spherical steel slag aggregate that step 2 obtains, keeps environment relatively wet
Degree is 80%, and temperature is 20 DEG C, conserves 4d.
The carbonization of step 4 steel slag aggregate: the spherical steel slag aggregate after precuring is put into carbonization kettle, being passed through concentration is
The CO of 99.9vt.%2, pressure 0.4MPa, control carbonization time is 8h, obtains the carbonization artificial porous aggregate of steel slag.
Comparative example 1
A kind of preparation method for the artificial porous aggregate of steel slag that is not carbonized, comprising the following steps: steel slag block is crushed, it will
Obtained broken steel slag is put into grinding machine, and being milled to specific surface area is 260m2The steel-making slag powder of/g；Weigh 40 mass parts steel-making slag powders, 20 matter
It measures part cement and the mixing of 40 mass parts flyash and spherical steel slag aggregate is obtained with the quality ratio of mud 0.19 plus water balling-up；Then exist
Relative humidity 50%, to spherical steel slag aggregate precuring 48h obtained above under conditions of 20 DEG C of temperature.Be not carbonized steel slag
Artificial porous aggregate, is denoted as C1, and pressure steams obtained aggregate appearance referring to Fig. 7, from figure in the environment of 216 DEG C, pressure 2MPa
In as can be seen that there is dusting or broken in the artificial porous aggregate of steel slag that is not carbonized, for percentage of damage up to 44%, comparison diagram 6 and Fig. 7 can
To find out the volume stability for using the carbonization technique in this patent that can promote steel slag aggregate, use steel slag aggregate safely.
Comparative example 2
A kind of carbonization nickel slag aggregate processing method, the described method comprises the following steps: by nickel clinker grinding to specific surface
Product is 200m2The powder of/g is in mass ratio nickel ground-slag: cement: brick powder=40:20:40 proportion balling-up obtains nickel slag ball；
Then 72h is conserved under conditions of relative humidity 50%, 30 DEG C of temperature.After the completion of maintenance, nickel slag ball is put into carbonization kettle, is led to
Enter the CO of 100vt.% concentration2, controlling pressure in kettle is 0.2MPa, and carbonization obtains carbonization nickel slag aggregate afterwards for 24 hours, is denoted as C2.
Comparative example 3
A kind of natural aggregate: natural aggregate is the limestone aggregate for being broken into 9.5-19mm, is denoted as NA.Use natural aggregate
Formation of concrete.
In embodiment 1-3 and this comparative example concrete crushing strength schematic diagram referring to fig. 2, it can be seen from the figure that this hair
The carbonization aggregate that bright embodiment 1-3 is obtained, which prepares concrete crushing strength, can meet the requirement of C40 concrete, and most
It can achieve 53.8MPa greatly.The self-constriction deformation schematic diagram of aggregate, can from figure referring to Fig. 3 in embodiment 1-3 and this comparative example
To find out, relative to natural aggregate, the steel slag aggregate that is carbonized can obviously reduce the early stage volume contraction of concrete.
Proportion such as the following table 1 of concrete in above-described embodiment 1-3 and comparative example 3, wherein aggregate selects embodiment 1-3 respectively
And aggregate prepared by comparative example 3.
The molding of 1 one cubic meter of concrete of table matches (kg)
The crush index of table 2 is measured according to the method in GB/T14685-2011 " for building cobble, rubble ".
The crush index (%) of 2 steel slag aggregate of table
Table 2 is the crush index of aggregate in embodiment 1-3 and comparative example 1-3, as can be seen from the table, after carbonization
Aggregate crush values reduce 11.66% relative to the steel slag aggregate that is not carbonized, according to standard GB/T14685-2011, embodiment 2
Aggregate can be used as I grade of aggregate and use.
Bulk density (the kg/m of 3 steel slag aggregate of table3)
The aggregate density that table 3 is embodiment 1-3 and comparative example 1 measures, passes through the aggregate of carbonization more as can be seen from the table
Encryption is real, and with the introducing of flyash, the bulk density of aggregate is reduced.
Claims (7)
1. a kind of preparation method for the artificial porous aggregate of steel slag that is carbonized, which is characterized in that the described method comprises the following steps:
The preparation of step 1 steel-making slag powder: being crushed steel slag block, and obtained broken steel slag is put into grinding machine, specific surface is milled to
Product is 100-280 m2The steel-making slag powder of/g；
Step 2 steel slag ball aggregate processing: weigh the steel-making slag powder of 30-100 mass parts, the portland cement of 5-20 mass parts,
The mixing of at least one of the brick powder of 0-60 mass parts and flyash obtains spherical steel slag bone by the ratio of mud 0.19 plus water balling-up
Material；
The pretreatment of step 3 aggregate: precuring is carried out to the spherical steel slag aggregate that step 2 obtains, holding envionmental humidity is
40-98%, temperature are 20-60 DEG C, conserve 0-7 d；
The carbonization of step 4 steel slag aggregate: the spherical steel slag aggregate after precuring is put into carbonization kettle, and being passed through concentration is 5-
The CO of 100 vt.%2, pressure is 0.052-1 MPa, and control carbonization time is 0.5-72 h, obtains carbonization steel slag manually porous bone
Material.
2. a kind of preparation method of artificial porous aggregate of steel slag that is carbonized according to claim 1, which is characterized in that the step
Steel slag block raw material is the byproduct steel slag in steelmaking process in rapid one.
3. a kind of preparation method of artificial porous aggregate of steel slag that is carbonized according to claim 1, which is characterized in that the step
Obtained broken steel slag is put into grinding machine in rapid one, being milled to specific surface area is 260 m2The steel-making slag powder of/g.
4. a kind of preparation method of artificial porous aggregate of steel slag that is carbonized according to claim 1, which is characterized in that the step
60 mass parts steel-making slag powders, 10 mass parts portland cements, the mixing of 30 mass parts flyash are weighed in rapid two.
5. a kind of preparation method of artificial porous aggregate of steel slag that is carbonized according to claim 1, which is characterized in that the step
It is 80% that envionmental humidity is kept in rapid three, and temperature is 20 DEG C, conserves 4 d.
6. a kind of preparation method of artificial porous aggregate of steel slag that is carbonized according to claim 1, which is characterized in that the step
The CO that concentration is 99.9 vt.% is passed through in rapid four2, pressure is 0.4 MPa, and control carbonization time is 8 h.
7. the artificial porous aggregate of carbonization steel slag of any method preparation of claim 1-6.
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| CN112266193A (en) * | 2020-10-15 | 2021-01-26 | 南京工业大学 | Artificial steel slag aggregate and preparation method and application thereof |
| CN112474050A (en) * | 2020-12-08 | 2021-03-12 | 李平 | Method for preparing concrete aggregate by utilizing smelting steel slag |
| CN112500011A (en) * | 2020-12-15 | 2021-03-16 | 上海建工建材科技集团股份有限公司 | Preparation method of steel carbide slag lightweight aggregate and concrete containing steel carbide slag lightweight aggregate |
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| CN115353341A (en) * | 2022-09-21 | 2022-11-18 | 山东京韵泰博新材料科技有限公司 | Preparation method and application of novel raw material for pouring system |
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| CN115448628B (en) * | 2022-09-23 | 2023-08-25 | 天津水泥工业设计研究院有限公司 | Carbonized porous steel slag aggregate and preparation method thereof |
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