CN115108784B - Low-cost thiourea slag carbonized brick and preparation method thereof - Google Patents
Low-cost thiourea slag carbonized brick and preparation method thereof Download PDFInfo
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- CN115108784B CN115108784B CN202210821745.9A CN202210821745A CN115108784B CN 115108784 B CN115108784 B CN 115108784B CN 202210821745 A CN202210821745 A CN 202210821745A CN 115108784 B CN115108784 B CN 115108784B
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- slag
- thiourea
- carbonized
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- brick
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- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 239000002893 slag Substances 0.000 title claims abstract description 113
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 239000011449 brick Substances 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 40
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000203 mixture Substances 0.000 claims abstract description 29
- 238000003763 carbonization Methods 0.000 claims abstract description 19
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 18
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000654 additive Substances 0.000 claims abstract description 11
- 230000000996 additive effect Effects 0.000 claims abstract description 11
- 150000001875 compounds Chemical class 0.000 claims abstract description 10
- 230000032683 aging Effects 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000010000 carbonizing Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 18
- 239000010881 fly ash Substances 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 16
- 239000004575 stone Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 5
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 4
- 229910002651 NO3 Inorganic materials 0.000 claims description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 4
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 3
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 3
- 229910021487 silica fume Inorganic materials 0.000 claims description 3
- FZVXUPLDQNBUQZ-UHFFFAOYSA-N [Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])([O-])O[Si]([O-])([O-])[O-] Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])([O-])O[Si]([O-])([O-])[O-] FZVXUPLDQNBUQZ-UHFFFAOYSA-N 0.000 claims description 2
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 claims description 2
- ARHMMDOXGIIARL-UHFFFAOYSA-N calcium;dihydroxy(dioxido)silane Chemical compound [Ca+2].O[Si](O)([O-])[O-] ARHMMDOXGIIARL-UHFFFAOYSA-N 0.000 claims description 2
- 238000000748 compression moulding Methods 0.000 claims description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 2
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 2
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 2
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 2
- 239000004973 liquid crystal related substance Substances 0.000 claims 2
- 239000011230 binding agent Substances 0.000 claims 1
- 238000013329 compounding Methods 0.000 claims 1
- 239000004615 ingredient Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 9
- 238000009776 industrial production Methods 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 239000011575 calcium Substances 0.000 description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000011469 building brick Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- MYFXBBAEXORJNB-UHFFFAOYSA-N calcium cyanamide Chemical compound [Ca+2].[N-]=C=[N-] MYFXBBAEXORJNB-UHFFFAOYSA-N 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000000887 hydrating effect Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000001741 organic sulfur group Chemical group 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002351 wastewater 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- 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
- C04B18/04—Waste materials; Refuse
- C04B18/0427—Dry materials
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
-
- 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
Abstract
The invention discloses a low-cost thiourea slag carbonized brick and a preparation method thereof. The preparation method comprises the following steps: according to the mass percentage, thiourea slag, carbonized cementing material, compound materials and aggregate are mixed to obtain a mixture; uniformly mixing the mixture with water or an additive solution to obtain a pressed brick wet material; and (3) ageing, press forming, carbonizing and airing the pressed brick wet material in sequence to obtain the low-cost thiourea slag carbonized brick. According to the invention, the thiourea slag is used as a main raw material to prepare the carbonized bricks, so that the problems of large occupied space and difficult treatment of solid waste of the thiourea slag are solved, resources are reasonably utilized, and waste materials are changed into valuable materials; meanwhile, carbon dioxide is captured, sealed and utilized by the carbonized bricks, so that the emission of the carbon dioxide is reduced; in addition, compared with other carbonized bricks, most of raw materials used in the carbonized bricks prepared by the invention are thiourea slag, so that the cost is obviously reduced on the basis of equivalent product performance, and industrial production is realized; simultaneously, the compression strength and the flexural strength are high, and the strength of MU10 can be achieved after carbonization maintenance.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a low-cost thiourea slag carbonized brick and a preparation method thereof.
Background
Thiourea is an organic sulfur-containing compound and can be used for preparing medicines, dyes and resins, but a large amount of thiourea slag is inevitably generated during thiourea production, and after the thiourea slag is piled up, a large amount of space is occupied, so that the production is influenced, and resources are wasted. The main components of the thiourea slag are other components such as calcium hydroxide, sulfur trioxide, silicon dioxide, ferric oxide and the like, wherein the content of the calcium hydroxide is 40% -90%. The thiourea slag is low in price, and if the thiourea slag can be reasonably utilized, waste is changed into valuable, so that the thiourea slag has great environmental protection and economic value.
The Chinese patent No. 102701777B discloses a method for manufacturing high-strength building bricks by using thiourea slag and fly ash, which comprises the following steps of: (0.2-1), uniformly mixing, pressing, drying, calcining at high temperature, wherein the calcining temperature is as high as 900-1300 ℃; the Chinese patent No. 102303884B relates to a method for producing calcium carbonate by using thiourea slag and analytic gas of a petroleum coking and hydrogen producing device as raw materials, which specifically comprises a large amount of calcium-containing thiourea slag and wastewater generated after thiourea is produced by using a lime nitrogen method, and the analytic gas generated by the petroleum coking and hydrogen producing device is matched, however, carbon dioxide is discharged during high-temperature activated carbon removal.
Therefore, the method for consuming the thiourea slag in a large amount has important significance for realizing the recycling of the thiourea slag, and is low in energy consumption, environment-friendly and capable of consuming the thiourea slag in a large amount.
Disclosure of Invention
The invention aims to overcome the technical defects, provides a low-cost thiourea slag carbonized brick and a preparation method thereof, and solves the technical problems of high energy consumption and environmental protection of a thiourea slag recycling method in the prior art.
In order to achieve the technical purpose, the first aspect of the invention provides a preparation method of a low-cost thiourea slag carbonized brick, which comprises the following steps:
according to the mass percentage, 10 to 70 percent of thiourea slag, 6 to 50 percent of carbonized cementing material, 15 to 25 percent of compound materials and 9 to 15 percent of aggregate are mixed to obtain a mixture;
uniformly mixing the mixture with water or an additive solution to obtain a pressed brick wet material;
aging the pressed brick wet material to obtain an aged pressed brick wet material;
pressing and molding the aged wet pressed brick material to obtain a molded blank;
and carbonizing the formed blank and airing to obtain the low-cost thiourea slag carbonized brick.
In the invention, thiourea slag accounts for 10-70% of the total mass of the mixture. For example, 10%, 20%, 30%, 40%, 50%, 60%, 70%, etc., and the present invention is not limited thereto, and those skilled in the art may select them according to actual circumstances. Those skilled in the art will understand that if the proportion of thiourea slag is too high, the strength of the carbonized brick will be reduced, and if the proportion of thiourea slag is too low, the utilization rate of thiourea slag will be not improved, and the invention can improve the utilization rate of thiourea slag and reduce the cost on the premise of reducing the strength of the carbonized brick by strictly controlling the types and the content of raw materials.
Preferably, the carbonized cementing material is at least one of gamma-dicalcium silicate, monocalcium silicate, steel slag and tricalcium disilicate.
Preferably, the mass ratio of thiourea slag to carbonized cementing material is 1: (0.08 to 5), for example, may be 1:0.08, 1:0.13, 1:0.2, 1:0.5, 1: 1. 1: 2. 1: 3. 1: 4. 1:5, the present invention is not limited thereto, and those skilled in the art can select according to actual circumstances.
Preferably, the compound is one or more of carbide slag, fly ash, slag, phosphorous slag, silica fume and kiln dust. The fly ash, the carbide slag, the phosphorous slag, the silica fume and the kiln dust have the function of perfecting the grading, reduce gaps among particles, discharge partial water in the gaps and increase free water, so that the fluidity of slurry is increased, the requirement on water consumption is reduced, the compactness of a mixture is increased, and meanwhile, the cement can be hydrated, and the partial strength is improved; the slag and slag play a role in filling or micro-aggregate, so that the compactness can be increased, the bleeding of an interface is reduced, the transition zone is densified by effective accumulation, the structure of a transition layer of a secondary central zone is improved, the impermeability is increased, and the deformation performance is reduced. In some preferred embodiments of the invention, the formulation is a mixture of carbide slag, fly ash, slag, and carbide slag + fly ash: the mass ratio of slag to slag was 1.5:1.
Preferably, the aggregate is stone nitrate.
Preferably, the amount of water is 10% to 25%, more preferably 15% of the total amount of the mixture.
Preferably, the additive solution is one or more of sodium bicarbonate solution, citric acid solution, sodium pyrophosphate solution and magnesium sulfate solution, the concentration of the additive solution is 5-15 wt%, and the dosage of the additive solution is 10-25% of the total amount of the mixture. In some embodiments of the invention, the additive solution is a sodium bicarbonate solution with a mass fraction of 5wt% in an amount of 15% of the total amount of the mix.
According to the invention, the wet material is aged, so that free calcium oxide in the wet material can be digested, but the aging time is not too long, the aging time is too long, the strength is not improved by carbonization process in the later period, and the strength of the product is obviously reduced. Preferably, the ageing time of the wet pressed brick material is 1-48 hours, preferably 12-36 hours, more preferably 24 hours.
Preferably, in the process of compression molding, the pressure is 2MPa to 15MPa, and the dwell time is 5s to 30s.
Preferably, in the carbonization process, the volume concentration of carbon dioxide in the carbonization gas is 3-100%, the carbonization pressure is 0-0.6 MPa, and the carbonization time is 10-72 h. The invention does not limit the source of the carbonized gas, and the person skilled in the art can select the carbonized gas according to the actual situation, for example, the carbonized gas can be tail gas of a thermal power plant, tail gas of a steel plant, tail gas of a cement plant, tail gas of a dicyandiamide preparation plant and petrochemical tail gas. In some embodiments of the invention, the carbon dioxide concentration in the carbonization gas is 60%, the carbon dioxide pressure is 0.4MPa, and the carbonization time is 24 hours.
The invention does not limit the airing time, and the person skilled in the art can adjust the airing time according to actual conditions. In some embodiments of the invention, the air drying time is 8 hours to 240 hours.
A second aspect of the present invention provides a low-cost thiourea slag carbonized tile obtained by the method of preparing the low-cost thiourea slag carbonized tile of the first aspect of the present invention.
The mechanism involved in the invention is as follows:
in the invention, stone nitrate is used as aggregate to play a supporting role, so that the influence on the compressive strength is large; the carbonized cementing material and the thiourea slag play a role in supporting and bonding after carbonization and hydration, and have influence on compressive strength and flexural strength; the compound material has the functions of grading, compacting and hydrating, and can increase the impermeability and the strength.
In the invention, after the formed blank is pressed, the water in the product is diffused into coarse holes, capillary holes and gel holes and is diffused to the inside, and calcium hydroxide in thiourea slag, silicon and aluminum materials in compound materials (such as fly ash and the like) and water are subjected to hydration reaction to produce hydrated calcium silicate or hydrated calcium aluminate, and the related reactions are as follows:
Ca(OH) 2 +SiO 2 +(n-1)H 2 O＝CaO·SiO 2 ·nH 2 O
Ca(OH) 2 +Al 2 O 3 +(n-1)H 2 O＝CaO·Al 2 O 3 ·nH 2 O
introducing industrial tail gas containing carbon dioxide, separating out alkaline metal cations in the product, determining the weight of the trapped and sealed carbon dioxide, diffusing the carbon dioxide to the surface, reacting the carbon dioxide with water to produce carbonic acid, and ionizing the carbonic acid into H + 、CO 3 2- Plasma and alkaline metal cations are subjected to carbonization reaction to form calcium carbonate, calcium silicate hydrate is used as a cementing material to connect and coagulate calcium carbonate crystal nuclei together, meanwhile, the compound material plays roles in grading and filling, and the additive can improve the carbonization degree of the carbonized brick, which is also the reason of high strength of the carbonized brick.
Ca(OH) 2 ＝Ca 2+ +2OH -
H 2 CO 3 ＝H + +HCO 3 -
HCO 3 - ＝H + +CO 3 2-
Ca 2+ +CO 3 2- ＝CaCO 3
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the thiourea slag is used as a main raw material to prepare the carbonized bricks, so that the problems of large occupied space and difficult treatment of solid waste of the thiourea slag are solved, resources are reasonably utilized, and waste materials are changed into valuable materials; meanwhile, carbon dioxide is captured, sealed and utilized by the carbonized bricks, so that the emission of the carbon dioxide is reduced; in addition, compared with other carbonized bricks, most of raw materials used in the carbonized bricks prepared by the invention are thiourea slag, so that the cost is obviously reduced on the basis of equivalent product performance, and industrial production is realized; simultaneously, the compression strength and the flexural strength are high, and the strength of MU10 can be achieved after carbonization maintenance.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
A preparation method of a low-cost thiourea slag carbonized brick comprises the following steps:
(1) Weighing 500kg of thiourea slag, 100kg of steel slag, 100kg of fly ash, 50kg of carbide slag, 50kg of slag and 150kg of stone nitrate, and putting into a stirrer to obtain a mixture;
(2) Spraying 150kg of sodium bicarbonate solution with the concentration of 5wt% to a stirring bin, starting a stirrer, and uniformly mixing the mixture and the solution to obtain a brick pressing wet material;
(3) Feeding the pressed brick wet material into a digestion warehouse for aging for 24 hours to obtain an aged pressed brick wet material;
(4) Pressing the aged wet pressed brick material into a blank body with 240 x 114 x 53mm under 7.2MPa, keeping the pressure for 5s, and orderly stacking the formed blank body on a trolley from a conveying belt;
(5) Pushing the trolley into a carbonization kettle, sealing a kettle door by using steam, introducing carbon dioxide industrial tail gas, wherein the carbon dioxide concentration is 60%, the carbon dioxide pressure is 0.4MPa, the carbonization time is 24 hours, and airing the carbonized bricks to obtain the low-cost thiourea slag carbonized bricks.
Example 2
In comparison with example 1, only 300kg of thiourea slag, 300kg of steel slag, 100kg of fly ash, 50kg of carbide slag, 50kg of slag and 150kg of stone are weighed in step (1), and put into a stirrer to obtain a mixture.
Example 3
In comparison with example 1, in the step (1), 100kg of thiourea slag, 500kg of steel slag, 100kg of fly ash, 50kg of carbide slag, 50kg of slag and 150kg of stone are weighed and put into a stirrer to obtain a mixture.
Example 4
In comparison with example 1, in the step (1), 500kg of thiourea slag, 100kg of steel slag, 25kg of fly ash, 25kg of carbide slag, 100kg of slag and 150kg of stone are weighed and put into a stirrer to obtain a mixture.
Example 5
In comparison with example 1, in the step (1), 500kg of thiourea slag, 100kg of steel slag, 150kg of fly ash, 100kg of carbide slag and 150kg of stone are weighed and put into a stirrer to obtain a mixture.
Example 6
In comparison with example 1, in the step (1), 600kg of thiourea slag, 80kg of steel slag, 80kg of fly ash, 40kg of carbide slag, 40kg of slag and 120kg of stone are weighed and put into a stirrer to obtain a mixture.
Example 7
In comparison with example 1, in the step (1), 700kg of thiourea slag, 60kg of steel slag, 60kg of fly ash, 30kg of carbide slag, 30kg of slag and 90kg of stone are weighed and put into a stirrer to obtain a mixture.
Example 8
Compared with the embodiment 1, the method is only different in that 150kg of water is sprayed to a stirring bin in the step (2), a stirrer is started, and the mixture is uniformly mixed with the water to obtain the pressed brick wet material.
Comparative example 1
The difference from example 1 was that in step (1), 1000kg of thiourea slag was weighed and charged into a stirrer to obtain a mixture.
Comparative example 2
In comparison with example 1, the difference was that in step (1), 850kg of thiourea slag and 150kg of stone were weighed and put into a stirrer to obtain a mixture.
Comparative example 3
The difference from example 1 was that in step (1), 850kg of steel slag and 150kg of stone were weighed and put into a stirrer to obtain a mixture.
Comparative example 4
In comparison with example 1, in the step (1), 708kg of thiourea slag, 142kg of steel slag and 150kg of stone were weighed and put into a stirrer to obtain a mixture.
Comparative example 5
In comparison with example 1, in the step (1), 800kg of thiourea slag, 40kg of steel slag, 40kg of fly ash, 20kg of carbide slag, 20kg of slag and 60kg of stone are weighed and put into a stirrer to obtain a mixture.
Comparative example 6
The difference compared with example 1 is only that comparative example 6 was not aged, and the wet pressed brick material was directly pressed to be formed.
Comparative example 7
The difference compared with example 1 is that in the step (3), the wet pressed brick material is fed into a digestion warehouse to be aged for 72 hours, so that the wet pressed brick material after being aged is obtained.
The raw materials of examples 1 to 8 and comparative examples 1 to 7 described above are summarized in Table 1, and the test results are shown in Table 2.
TABLE 2
As can be seen from Table 1, the mechanical properties of the carbonized bricks prepared by the examples of the present invention are remarkably improved compared with the carbonized bricks of pure thiourea. Although thiourea slag has certain carbonization activity to prepare carbonized products, the activity is poor, and in the process of preparing carbonized bricks, the carbonized bricks have large volume, carbon dioxide is difficult to enter the inside of the carbonized bricks, so that the strength of the obtained carbonized bricks is obviously reduced. In order to further improve the strength of the carbonized bricks and enable the carbonized bricks to meet related requirements, the invention uses thiourea slag as a main material, adds carbonized cementing materials and various compound materials, the raw materials are mostly industrial solid waste, the cost of the thiourea slag is five times per ton, compared with the cost of other brick making raw materials, the cost of the carbonized bricks is reduced by more than ten times, the cost of each brick is reduced by 2-3 times while the high performance of the carbonized bricks is maintained. In addition, the reaction is carried out at normal temperature and normal pressure, the process is simple, high-temperature sintering is not needed, and the method is suitable for continuous industrial production; meanwhile, the process can absorb, capture and seal carbon dioxide in industrial tail gas, and is low-carbon and environment-friendly.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any other corresponding changes and modifications made in accordance with the technical idea of the present invention shall be included in the scope of the claims of the present invention.
Claims (7)
1. The preparation method of the low-cost thiourea slag carbonized brick is characterized by comprising the following steps of:
according to the mass percentage, mixing 30% -70% of thiourea slag, 6% -30% of carbonized cementing material, 15% -25% of compound materials and 9% -15% of aggregate to obtain a mixture;
uniformly mixing the mixture with water or an additive solution to obtain a pressed brick wet material;
aging the pressed brick wet material for 1-48 hours to obtain an aged pressed brick wet material;
pressing and molding the aged wet pressed brick material to obtain a molded blank;
carbonizing the molded blank and then airing to obtain a low-cost thiourea slag carbonized brick; wherein, the liquid crystal display device comprises a liquid crystal display device,
the compound ingredients are one or more of carbide slag, fly ash, slag, phosphorous slag, silica fume and kiln dust;
in the compression molding process, the pressure is 2-15 MPa, and the pressure maintaining time is 5-30 s;
in the carbonization process, the volume concentration of carbon dioxide in the carbonization gas is 3% -100%, the carbonization pressure is 0-0.6 MPa, and the carbonization time is 10-72 h.
2. The method for producing a low-cost thiourea slag carbonized brick as claimed in claim 1, wherein the carbonized binder is at least one of γ -dicalcium silicate, monocalcium silicate, steel slag, tricalcium disilicate.
3. The method for producing a low-cost thiourea slag carbonized tile as claimed in claim 1, wherein the aggregate is stone nitrate.
4. The method for preparing the low-cost thiourea slag carbonized brick according to claim 1, wherein the compounding is a mixture of carbide slag, fly ash, slag and slag, and carbide slag + fly ash: the mass ratio of slag to slag was 1.5:1.
5. The method for preparing the low-cost thiourea slag carbonized brick according to claim 1, wherein the amount of the water or the additive solution is 10% -25% of the total amount of the mixture.
6. The method for preparing the low-cost thiourea slag carbonized brick according to claim 1, wherein the additive solution is one or more of sodium bicarbonate solution, citric acid solution, sodium pyrophosphate solution and magnesium sulfate solution, and the concentration of the additive solution is 5-15 wt%.
7. A low-cost thiourea slag carbonized tile characterized by being obtained by the method for producing a low-cost thiourea slag carbonized tile as claimed in any one of claims 1 to 6.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701777A (en) * | 2012-05-29 | 2012-10-03 | 山东京博控股股份有限公司 | Method for preparing high strength structural brick |
| AU2018101200A4 (en) * | 2018-08-19 | 2018-09-20 | Rodricks, Peter Anil MR | Production of environmentally sustainable bricks & blocks and plaster for construction from coastal desert sands and fly ash |
| CN112408928A (en) * | 2020-10-12 | 2021-02-26 | 山东京博环保材料有限公司 | High-strength roadbed concrete and preparation method thereof |
| CN114163205A (en) * | 2021-12-02 | 2022-03-11 | 山东汉博昱洲新材料有限公司 | Steel slag-based carbonized material and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701777A (en) * | 2012-05-29 | 2012-10-03 | 山东京博控股股份有限公司 | Method for preparing high strength structural brick |
| AU2018101200A4 (en) * | 2018-08-19 | 2018-09-20 | Rodricks, Peter Anil MR | Production of environmentally sustainable bricks & blocks and plaster for construction from coastal desert sands and fly ash |
| CN112408928A (en) * | 2020-10-12 | 2021-02-26 | 山东京博环保材料有限公司 | High-strength roadbed concrete and preparation method thereof |
| CN114163205A (en) * | 2021-12-02 | 2022-03-11 | 山东汉博昱洲新材料有限公司 | Steel slag-based carbonized material and preparation method and application thereof |
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