CN115353341A - Preparation method and application of novel raw material for pouring system - Google Patents
Preparation method and application of novel raw material for pouring system Download PDFInfo
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- CN115353341A CN115353341A CN202211152301.7A CN202211152301A CN115353341A CN 115353341 A CN115353341 A CN 115353341A CN 202211152301 A CN202211152301 A CN 202211152301A CN 115353341 A CN115353341 A CN 115353341A
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- 239000002994 raw material Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000002893 slag Substances 0.000 claims abstract description 63
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 15
- 239000004575 stone Substances 0.000 claims abstract description 15
- 239000011159 matrix material Substances 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 14
- 239000011259 mixed solution Substances 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 11
- 238000010000 carbonizing Methods 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000243 solution Substances 0.000 claims abstract description 7
- 239000002699 waste material Substances 0.000 claims abstract description 6
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 4
- 238000003763 carbonization Methods 0.000 claims description 22
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000007864 aqueous solution Substances 0.000 claims description 9
- 229910021487 silica fume Inorganic materials 0.000 claims description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 239000006004 Quartz sand Substances 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 4
- 238000001723 curing Methods 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical group [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 229910021534 tricalcium silicate Inorganic materials 0.000 claims description 3
- 235000019976 tricalcium silicate Nutrition 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 5
- 238000005034 decoration Methods 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000003623 enhancer Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- 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
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- 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
- C04B40/0254—Hardening in an enclosed space, e.g. in a flexible container
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a preparation method and application of a novel raw material for a pouring system, wherein the preparation method of the raw material comprises the following steps: the wetted waste steel slag is put in CO 2 Carbonizing treatment in a high-concentration pressurized environment; then mixing and stirring the raw materials and the filling material to obtain a mixed dry material; then mixing the water reducing agent and the reinforcing agent solution to obtain a mixed solution, and uniformly mixing the mixed solution and the mixed dry material to obtain slurry; and finally, treating the slurry in a plastic mold to obtain a casting product matrix, and placing the casting product matrix in a carbon dioxide environment again for secondary treatment to obtain a high-strength casting product. The novel raw material of the pouring system has higher strength, the product prepared by taking the carbonized steel slag as the raw material not only realizes the resource utilization of the steel slag, but also can absorb CO 2 In the stone field and road and other buildingsThe decoration industry has good development prospect.
Description
Technical Field
The invention belongs to the technical field of building materials and the technical field of comprehensive utilization of solid waste resources, and particularly relates to a preparation method and application of a novel raw material for a pouring system.
Background
The steel slag is waste slag generated in the metallurgical industry, the generation rate of the steel slag is 8% -15% of the yield of crude steel, and the worldwide discharge amount of the steel slag in 2012 is about 1.8 hundred million tons. The amount of steel slag produced in China is rapidly increasing with the rapid development of the steel industry. Therefore, the problems of treatment and resource utilization of the waste slag of the iron and steel enterprises are more and more emphasized.
The national development plan indicates that the comprehensive utilization rate of the steel slag is up to more than 86 percent, and zero emission is basically realized. However, the current situation of comprehensive utilization is far from the planning, and especially the utilization rate of converter steel slag called "poor cement clinker" is only 10% -20%. The steel slag produced by domestic iron and steel enterprises can not be treated in time, so that a large amount of steel slag occupies land and pollutes the environment. However, steel slag is not an unusable solid waste, which contains a large amount of usable components such as steel slag, calcium oxide, iron, and magnesium oxide. Therefore, in order to create economic and environmental benefits for steel enterprises, it is necessary and urgent to select a proper treatment process and a proper utilization approach to develop the recycling value of steel slag.
At present, a plurality of building products are prepared by using steel slag, wherein a part of the products have better effects, but the requirements on high-strength products are increased due to higher and higher performance indexes of the building decoration industry, and the stone is paid extensive attention by the unique advantages.
Disclosure of Invention
The invention aims to provide a preparation method and application of a novel raw material for a pouring system, which solves the problem of CO by using carbonized steel slag as a raw material 2 The problems of large discharge and steel slag pollution are solved, the problem of lack of natural stone resources in the building industry is also solved, and a pouring product with high strength is prepared.
In order to achieve the purpose, the application is realized through the following technical scheme:
a preparation method of a novel raw material for a pouring system comprises the following steps:
s1, wetting the waste steel slag in high-concentration CO 2 Carbonizing treatment in a pressurized environment;
s2, mixing and stirring the carbonized steel slag obtained in the step S1 with one or more of furnace slag, cement, quartz sand, silica fume and thiourea slag to obtain a dry mixed material;
s3, mixing the water reducing agent with the reinforcing agent solution to obtain a mixed solution, wherein the mixed solution and the mixed dry materials are mixed according to the weight ratio of 1:10-4:10, uniformly mixing and stirring to form pouring slurry;
s4, sealing, curing and molding the pouring slurry in a plastic mold, and finally demolding and drying to obtain a pouring product matrix;
and S5, placing the casting product matrix in a carbon dioxide environment for secondary carbonization treatment to obtain a high-strength casting product.
Further, the main mineral composition of the steel slag in step S1 is tricalcium silicate, dicalcium ferrite, RO or free lime.
Further, the wet condition in step S1 is a humidity of more than 80%.
Further, CO in step S1 2 The concentration is 50% -100%; the carbonization pressure is 0.1MPa to 0.6MPa; the carbonization time is 5min-30min.
Further, in the step S2, the mass ratio of the mixed dry materials is as follows: slag: cement: quartz sand: silica fume: thiourea residue = (50-90): (10-30): (5-10): (5-10): (2-5): (2-4).
Further, the enhancer in step S3 is MgSO 4 、KHCO 3 、KCl、NaHCO 3 And one or more of NaCl, wherein the mass ratio of the reinforcing agent to water is as follows: 1-30:30-100.
Further, the water reducing agent in the step S3 is a naphthalene-based high-efficiency water reducing agent, an aliphatic high-efficiency water reducing agent, an amino high-efficiency water reducing agent or a polycarboxylic acid high-performance water reducing agent, and the mass ratio of the water reducing agent to the reinforcing agent aqueous solution is 1-4.
Further, in the step S4, the sealing and maintaining time is 8-72 h; the drying time is 1h-72h; the drying temperature is 20-80 ℃.
Further, the carbonization pressure of the secondary carbonization in the step S5 is normal pressure; the carbonization time is 2h-48h; the carbonization concentration is 20-100%.
The high-strength pouring product prepared by the preparation method is at least applied to the concrete industry, the stone field, roads, the building industry or the decoration industry.
The invention has the beneficial effects that:
the utilization of the steel slag can reduce CO 2 The discharge can replace concrete raw materials such as cement, stone powder and the like, is widely used in the concrete industry, the stone field, the road and other building decoration industries, and has good development prospect.
The high-performance concrete prepared from the carbonized steel slag not only realizes the resource utilization of the steel slag, but also absorbs a large amount of CO 2 . The stone has high strength, simple technology and rich patterns, solves the problems of insufficient natural stone resources, low cracking strength of artificial stones and the like, and meets the demand of the market on the stone.
Drawings
FIG. 1 is a graph of the strength of cast products prepared in examples 1, 2 and 3 of the present invention.
Detailed Description
In the claims of this application, the reagents or materials used are commercially available unless otherwise specified.
Industrial waste steel slag with humidity of more than 80% and CO 2 Carbonizing treatment in a pressurized environment with the concentration of 50% -100%; the main mineral composition of the steel slag comprises tricalcium silicate, dicalcium ferrite, RO (oxides of magnesium, iron and manganese), free lime and the like; the carbonization time is 5min-30min.
Mixing and stirring the carbonized steel slag, the furnace slag, the thiourea slag, the stone fine sand and the glass sand to obtain a mixed dry material; the mass ratio of the mixed dry materials is as follows: slag: cement: quartz sand: silica fume: thiourea residue = (50-90): (10-30): (5-10): (5-10): (2-5): (2-4).
Mixing the water reducing agent and the reinforcing agent solution to obtain a mixed solution, and uniformly mixing and stirring the mixed solution and the mixed dry material to form pouring slurry; the reinforcing agent is MgSO 4 、KHCO 3 、KCl、NaHCO 3 And one or more of NaCl, wherein the mass ratio of the reinforcing agent to the water is as follows: 1-30:30-100 parts of; the water reducing agent comprises a naphthalene-based high-efficiency water reducing agent, an aliphatic high-efficiency water reducing agent, an amino high-efficiency water reducing agent, a polycarboxylic acid high-performance water reducing agent and the like, wherein the mass ratio of the water reducing agent to the reinforcing agent aqueous solution is (1); the dosage of the mixed solution is 10-40% of the raw materials.
Sealing, maintaining and molding the slurry in a plastic mold, and finally demolding and drying to obtain a pouring product matrix; the sealing and maintaining time is 8-72 h; the drying time is 1-72 h; the drying temperature is 20-80 ℃.
Placing the matrix in a carbon dioxide environment again for secondary carbonization treatment to obtain a high-strength pouring product; the carbonization pressure of the secondary carbonization is normal pressure; the carbonization time is 2h-48h; the carbonization concentration is 50% -100%.
The technical solutions of the present invention are described in detail below by way of examples with reference to the drawings, and the following examples are only exemplary, and can be used to explain and illustrate the technical solutions of the present invention, but not to be construed as limiting the technical solutions of the present invention.
Example 1
The embodiment provides a preparation method of a novel raw material of a pouring system, which comprises the following steps:
placing the steel slag in a place with the humidity of more than 80 percent and CO 2 Carbonizing for 10min in a reaction chamber with the concentration of 60% under the environment condition of the pressure of 0.3MPa to obtain the carbonized steel slag.
1230g of carbonized steel slag, 295g of slag, 157g of ordinary portland cement, 157g of quartz powder, 78g of silica fume and 50g of thiourea slag are stirred and mixed to obtain a dry mixed material.
10g of KCl was dissolved in 200g of water, and mixed and stirred to obtain an aqueous solution of an enhancer.
50g of a polycarboxylic acid water reducing agent was dissolved in 300g of an aqueous solution of a reinforcing agent to obtain a mixed solution.
And mixing the mixed liquid and the mixed dry material, and stirring for 15min to obtain pouring slurry.
Pouring the pouring slurry into a plastic mold of 10cm, curing for 12h under a sealed condition, and demolding and molding; drying at 40 ℃ for 24h until the water loss rate reaches 32%, and obtaining the pouring stone matrix.
Pouring the stone matrix in CO 2 Carbonizing at normal pressure for 36h in the environment to obtain a novel stone material which is named as 1-YL; the CO is 2 CO in the environment 2 The volume concentration of (b) is 60%.
Example 2
The embodiment provides a preparation method of a novel raw material of a pouring system, which comprises the following steps:
placing the steel slag with the humidity of more than 80 percent and CO 2 Carbonizing for 10min in a reaction chamber with the concentration of 60% under the environment condition of the pressure of 0.3MPa to obtain the carbonized steel slag.
1230g of carbonized steel slag, 295g of slag, 157g of ordinary portland cement, 157g of quartz powder, 78g of silica fume and 50g of thiourea slag are stirred and mixed to obtain a dry mixed material.
10g of KCl was dissolved in 200g of water, and mixed and stirred to obtain an aqueous solution of an enhancer.
50g of a polycarboxylic acid water reducing agent was dissolved in 300g of an aqueous solution of a reinforcing agent to obtain a mixed solution.
And mixing the mixed liquid and the mixed dry material, and stirring for 15min to obtain pouring slurry.
Pouring the pouring slurry into a plastic mold of 20cm to 3cm, curing for 12 hours under a sealed condition, and demolding and molding; and drying at 40 ℃ for 24h until the water loss rate reaches 32%, thus obtaining the pouring plate matrix.
Placing the cast plate matrix in CO 2 Carbonizing at normal pressure for 24 hours in the environment to obtain a novel plate, and naming the novel plate as 2-YL; CO 2 2 CO in the environment 2 The volume concentration of (c) is 60%.
Example 3
The embodiment provides a preparation method of a novel raw material of a pouring system, which comprises the following steps:
placing the steel slag with the humidity of more than 80 percent and CO 2 Carbonizing for 10min in a reaction chamber with the concentration of 60% under the environment condition of the pressure of 0.3MPa to obtain the carbonized steel slag.
1230g of carbonized steel slag, 295g of slag, 157g of ordinary portland cement, 157g of quartz powder, 78g of silica fume and 50g of thiourea slag are stirred and mixed to obtain a dry mixed material.
10g of KCl was dissolved in 200g of water, and mixed and stirred to obtain an aqueous solution of an enhancer.
50g of a polycarboxylic acid water reducing agent was dissolved in 300g of an aqueous solution of a reinforcing agent to obtain a mixed solution.
And mixing the mixed liquid and the mixed dry material, and stirring for 15min to obtain pouring slurry.
Pouring the pouring slurry into a round aggregate mold with the diameter of 2cm, maintaining for 12 hours under a sealed condition, and then demolding and molding; and drying at 40 ℃ for 16h to obtain an aggregate matrix, wherein the water loss rate reaches 32%.
Mixing the aggregate matrix with CO 2 Carbonizing for 24h under normal pressure in the environment to obtain a novel aggregate, and naming the novel aggregate as 3-YL; CO 2 2 CO in the environment 2 The volume concentration of (c) is 60%.
Correlation detection
Examples 1 to 3 were a casting stone, a casting slab, and a casting aggregate, each of which was prepared using a steel carbide slag as a main raw material. As can be seen from FIG. 1, the products obtained from the carbonized steel slag as a raw material have high strength because the steel slag is mixed with CO at a high concentration in a sufficiently humid environment 2 Pressure carbonization reaction is carried out to generate carbonic acid with certain strength in a short timeCalcium. In a pouring experiment, the carbonized steel slag is used as a main raw material, the internal reaction raw material is continuously hydrated to increase the strength through sealing maintenance, and continuously participates in a secondary carbonization reaction to absorb more CO 2 In addition, the completely carbonized part can play the role of support and porosity.
Other beneficial effects are as follows:
1) The novel raw material provided by the invention solves the problem of industrial CO 2 And (4) discharging a large amount of waste gas.
2) The novel raw materials provided by the invention effectively improve the utilization rate of the waste steel slag and solve the problem of environmental pollution.
3) The novel raw materials provided by the invention are cheap and easily available, and the operation is simple and convenient.
4) The pouring product prepared from the novel raw materials provided by the invention has high strength.
5) The carbonized steel slag can be applied to the building industry and has high application value and good development prospect.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A preparation method of a novel raw material for a pouring system is characterized by comprising the following steps:
s1, wetting the waste steel slag in high-concentration CO 2 Carbonizing treatment in a pressurized environment;
s2, mixing and stirring the carbonized steel slag obtained in the step S1 and one or more of furnace slag, cement, quartz sand, silica fume and thiourea slag to obtain a dry mixed material;
s3, mixing the water reducing agent with the reinforcing agent solution to obtain a mixed solution, and mixing the mixed solution with the mixed dry material according to the weight ratio of 1:10-4:10 evenly mixing and stirring to form pouring slurry;
s4, sealing, curing and molding the pouring slurry in a plastic mold, and finally demolding and drying to obtain a pouring product matrix;
and S5, placing the casting product matrix in a carbon dioxide environment for secondary carbonization treatment to obtain a high-strength casting product.
2. The method for preparing a novel raw material for a pouring system according to claim 1, wherein the steel slag in step S1 has a main mineral composition of tricalcium silicate, dicalcium ferrite, RO or free lime.
3. The method for preparing a novel raw material for a pouring system according to claim 1, wherein the humidity is greater than 80% in the step S1.
4. The method for preparing a novel raw material for a pouring system according to claim 1, wherein the CO in the step S1 2 The concentration is 50% -100%; the carbonization pressure is 0.1MPa to 0.6MPa; the carbonization time is 5min-30min.
5. The preparation method of the novel raw material for the pouring system according to claim 1, wherein the mass ratio of the mixed dry materials in the step S2 is steel carbide slag: slag: cement: quartz sand: silica fume: thiourea slag = (50-90): (10-30): (5-10): (5-10): (2-5): (2-4).
6. The method for preparing the novel raw material for the pouring system according to claim 1, wherein the reinforcing agent in the step S3 is MgSO 4 、KHCO 3 、KCl、NaHCO 3 And one or more of NaCl, wherein the mass ratio of the reinforcing agent to the water is as follows: 1-30:30-100.
7. The preparation method of the novel raw material for the pouring system according to claim 1, wherein the water reducing agent in the step S3 is a naphthalene-based high-efficiency water reducing agent, an aliphatic high-efficiency water reducing agent, an amino high-efficiency water reducing agent or a polycarboxylic acid high-performance water reducing agent, and the mass ratio of the water reducing agent to the reinforcing agent aqueous solution is 1-4.
8. The preparation method of the novel raw material for the pouring system according to claim 1, wherein in the step S4, the sealing and maintaining time is 8-72 h; the drying time is 1h-72h; the drying temperature is 20-80 ℃.
9. The method for preparing the novel raw material for the pouring system according to claim 1, wherein the carbonization pressure of the secondary carbonization in the step S5 is normal pressure; the carbonization time is 2h-48h; the carbonization concentration is 20-100%.
10. Use of a new raw material for casting systems, characterized in that the high-strength cast product prepared by the preparation method according to any one of claims 1 to 9 is applied at least in the concrete industry, stone field, road, building industry or finishing industry.
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| CN202211152301.7A CN115353341A (en) | 2022-09-21 | 2022-09-21 | Preparation method and application of novel raw material for pouring system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114180990A (en) * | 2021-12-16 | 2022-03-15 | 武汉理工大学 | Carbonization method and carbonization device for calcium silicate-containing mineral prefabricated part |
| CN114873971A (en) * | 2022-05-27 | 2022-08-09 | 山东汉博昱洲新材料有限公司 | Preparation method and application of industrialized pattern plate |
| CN114956729A (en) * | 2022-05-24 | 2022-08-30 | 山东汉博昱洲新材料有限公司 | Pouring type plate capable of degrading gaseous pollutants as well as preparation method and application of pouring type plate |
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| 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 |
| CN110282925A (en) * | 2019-06-25 | 2019-09-27 | 南京工业大学 | Artificial porous aggregate of a kind of carbonization steel slag and preparation method thereof |
| CN112266193A (en) * | 2020-10-15 | 2021-01-26 | 南京工业大学 | Artificial steel slag aggregate and preparation method and application thereof |
| CN114180990A (en) * | 2021-12-16 | 2022-03-15 | 武汉理工大学 | Carbonization method and carbonization device for calcium silicate-containing mineral prefabricated part |
| CN114956729A (en) * | 2022-05-24 | 2022-08-30 | 山东汉博昱洲新材料有限公司 | Pouring type plate capable of degrading gaseous pollutants as well as preparation method and application of pouring type plate |
| CN114873971A (en) * | 2022-05-27 | 2022-08-09 | 山东汉博昱洲新材料有限公司 | Preparation method and application of industrialized pattern plate |
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Application publication date: 20221118 |