CN115626795A - Steel slag-based carbon-fixing building material - Google Patents

Steel slag-based carbon-fixing building material Download PDF

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Publication number
CN115626795A
CN115626795A CN202211075339.9A CN202211075339A CN115626795A CN 115626795 A CN115626795 A CN 115626795A CN 202211075339 A CN202211075339 A CN 202211075339A CN 115626795 A CN115626795 A CN 115626795A
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Prior art keywords
steel slag
parts
building material
based carbon
slag
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CN202211075339.9A
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CN115626795B (en
Inventor
崔东波
杨猜霞
张学雷
白君君
孙浩
张余鑫
王健
祁泽
穆广杰
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Shandong Jingyun Taibo Negative Carbon Technology Co ltd
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Shandong Jingyun Taibo New Material Technology Co ltd
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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
    • C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
    • 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
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08—Flue dust, i.e. fly ash
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Processing Of Solid Wastes (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to a steel slag-based carbon-fixing building material which comprises the following raw materials in parts by mass: steel slag: 70-80 parts; slag: 5-10 parts; 4-8 parts of fly ash; magnesia: 5-10 parts; 0.1-0.3 part of cross-linked polymer. The steel slag-based carbon-fixing building material prepared by the invention utilizes three typical industrial wastes of slag, fly ash and magnesia to replace part of steel slag, and alkaline oxides and amphoteric oxides in the components stimulate the steel slag and CO 2 The carbonation reaction of the carbon dioxide realizes the effective solidification of the carbon dioxide. In addition, the mineral carbonization curing of the steel slag-based carbon-fixing building material prepared by the invention has wide application prospect and can simultaneously realize large-scale CO 2 Efficient way of sequestration and low-cost production of building materials。

Description

Steel slag-based carbon-fixing building material
Technical Field
The invention belongs to the technical field of environment-friendly materials, and particularly relates to a steel slag-based carbon-fixing building material.
Background
Energy conversion has become a key political problem in many countries. The major key to the climate change challenge is to convert the energy system from high-carbon to low-carbon energy supply and decouple energy demand from economic growth. Because of the high production cost of cement, it is important to develop and utilize other materials which can replace cement, among which CO can be mixed with cement 2 Mineralized alkaline industrial waste materials such as steel slag and the like are increasingly regarded as auxiliary cementing materials of concrete, and steel slag carbonization and maintenance are one of the most promising technologies for treating solid waste and absorbing carbon in the steel industry.
Due to the variability of the steel slag material properties and the high content of free CaO, the carbonation level of steel slag is low and the strength of the carbonated product as a building material is not high. Therefore, the improvement of the carbonation degree of the steel slag is the key to realize the further value of the steel slag as a building material.
Disclosure of Invention
The invention aims to provide a steel slag-based carbon-fixing building material, which aims to solve the problems of low carbonation degree of steel slag, low strength of carbonated products as building materials and the like.
In order to achieve the purpose, the method is realized by the following technical scheme:
the steel slag-based carbon-fixing building material comprises the following raw materials in parts by weight: steel slag: 70-80 parts; slag: 5-10 parts; 4-8 parts of fly ash; magnesia: 5-10 parts; 0.1-0.3 part of cross-linked polymer; water: 12-15 parts.
Preferably, the steel slag is converter steel slag.
Preferably, the converter steel slag contains 40-60% of CaO and has a particle size of 0.05-0.1mm.
Preferably, siO is contained in the slag 2 45-55 percent of the total content of the components and 0.1-0.15mm of granularity.
Preferably, the magnesite is high-purity magnesite meeting HYT 248-2018 ocean Standard of the people's republic of China.
Preferably, the cross-linked polymer is a microporous carbon dioxide trapping agent TPE-CPOP.
Preferably, the carbon dioxide trapping agent TPE-CPOP takes tetraphenylethylene as a precursor, anhydrous 1,2-dichloroethane as a solvent and AlCl 3 Is a product activated by KOH after the reaction of the catalyst and cyanuric chloride.
Preferably, the concrete preparation method of the steel slag-based carbon-fixing building material comprises the following steps:
(1) Steel slag: 70-80 parts; slag: 5-10 parts; 4-8 parts of fly ash; magnesia: 5-10 parts; mixing uniformly to obtain a mixture;
(2) Adding water to the mixture of (1): stirring 12-15 parts for 10-15min to obtain an adhesive;
(3) And (3) adding 0.1-0.3 part of cross-linked polymer into the adhesive in the step (2), and stirring for 2-3min to obtain the steel slag-based carbon-fixing building material.
Compared with the prior art, the invention has the beneficial effects that:
1. the carbonization treatment of the steel slag can obviously reduce the content of free calcium oxide and the reaction heat of hydration in the steel slag.
2. The invention utilizes three typical industrial wastes of slag, fly ash and magnesia to replace partial steel slag to replace the mechanical property, porosity and CO of the porous cement-based material 2 The adsorption capacity has a favourable effect.
3. The present invention applies research to this process within the framework of carbon dioxide capture, utilization and storage (CCUS) technology to reduce the greenhouse gas emissions of fossil fuels at power plants, cement plants or steel manufacturing plants and other point sources.
Drawings
FIG. 1 is a graph showing the compressive strength measurements of examples 1 to 6 and comparative example 1.
Detailed Description
The technical solutions of the present application are described below by examples, and the following examples are only exemplary and can be used only for explaining and explaining the technical solutions of the present invention, but not construed as limiting the technical solutions of the present invention.
The invention refers to GB 175-2007 general Portland cement for a method for testing the strength of a product obtained by carbonizing a steel slag-based carbon-fixing building material. Before testing, the carbon-fixing building material slurry is poured into a concrete compression-resistant engineering plastic test mould with 100X 100mm, and after 24h of room-temperature curing, the mould is removed and placed in CO 2 And (4) carrying out carbonation treatment under the atmosphere, and then obtaining the test building block.
The reagents used in the present application are conventional except where explicitly indicated, and are commercially available.
Example 1
The concrete preparation method of the steel slag-based carbon-fixing building material comprises the following steps: uniformly mixing 70 parts of steel slag, 10 parts of furnace slag, 4 parts of fly ash and 10 parts of magnesia to obtain a mixture; and adding 12 parts of water into the mixture, and stirring for 10min to obtain the adhesive. And adding 0.1 part of cross-linked polymer into the adhesive, and stirring for 2min to obtain the steel slag-based carbon-fixing building material.
Example 2
The concrete preparation method of the steel slag-based carbon-fixing building material comprises the following steps: uniformly mixing 75 parts of steel slag, 10 parts of furnace slag, 6 parts of fly ash and 5 parts of magnesia to obtain a mixture; 13 parts of water is added into the mixture and stirred for 10min to obtain the adhesive. And adding 0.2 part of cross-linked polymer into the adhesive, and stirring for 2min to obtain the steel slag-based carbon-fixing building material.
Example 3
The concrete preparation method of the steel slag-based carbon-fixing building material comprises the following steps: steel slag: 80 parts of a mixture; slag: 5 parts of a mixture; 8 parts of fly ash; magnesia: 10 parts of (A); mixing uniformly to obtain a mixture; to the mixture was added water: and stirring 13 parts of the mixture for 10min to obtain the adhesive. And adding 0.2 part of cross-linked polymer into the adhesive, and stirring for 2min to obtain the steel slag-based carbon-fixing building material.
Example 4
The concrete preparation method of the steel slag-based carbon-fixing building material comprises the following steps: uniformly mixing 80 parts of steel slag, 10 parts of furnace slag, 8 parts of fly ash and 10 parts of magnesia to obtain a mixture; 15 parts of water is added into the mixture and stirred for 15min to obtain the adhesive. And adding 0.3 part of cross-linked polymer into the adhesive, and stirring for 3min to obtain the steel slag-based carbon-fixing building material.
Example 5
The concrete preparation method of the steel slag-based carbon-fixing building material comprises the following steps: uniformly mixing 80 parts of steel slag, 5 parts of furnace slag, 6 parts of fly ash and 6 parts of magnesia to obtain a mixture; 15 parts of water is added into the mixture and stirred for 15min to obtain the adhesive. And adding 0.3 part of cross-linked polymer into the adhesive, and stirring for 3min to obtain the steel slag-based carbon-fixing building material.
Example 6
The concrete preparation method of the steel slag-based carbon-fixing building material comprises the following steps: the preparation method comprises the following steps: uniformly mixing 80 parts of steel slag, 10 parts of furnace slag, 8 parts of fly ash and 10 parts of magnesia to obtain a mixture; 14 parts of water is added into the mixture and stirred for 15min to obtain the adhesive. And adding 0.1 part of cross-linked polymer into the adhesive, and stirring for 3min to obtain the steel slag-based carbon-fixing building material.
Comparative example 1
Adding 15 parts of water into 100 parts of steel slag according to the mass ratio, uniformly mixing, and stirring for 15min to obtain a blank steel slag test sample.
The compressive strength of the block obtained by carbonizing the steel slag-based carbon-fixing building material in each embodiment is detected, as shown in fig. 1. The detection results show that the compressive strength of the steel slag-based carbon-fixing building material is obviously improved compared with that of a blank group, and the steel slag-based carbon-fixing building material prepared by the invention has good carbon dioxide absorption and solidification capacity.
Example 4 the sample compressive strength is significantly higher than the other groups, indicating that magnesite increases the steel slag system and CO 2 The effective component of carbonation reaction and the cross-linked polymer improve the CO content of the sample 2 The capture capacity of the slag and the porous effect of the fly ash enable the carbonation reaction to be moreFully; multiple substances act together to promote carbonation reaction, and generated carbonic acid products are mutually staggered, so that the microstructure is more compact, and the compressive strength of a sample is effectively improved. The steel slag-based carbon-fixing building material prepared by the invention has a very wide application prospect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modifications and substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims (8)

1. The steel slag-based carbon-fixing building material is characterized by comprising the following raw materials in parts by mass: steel slag: 70-80 parts; slag: 5-10 parts; 4-8 parts of fly ash; magnesia: 5-10 parts; 0.1-0.3 part of cross-linked polymer; water: 12-15 parts.
2. The steel slag-based carbon-fixing building material of claim 1, wherein the steel slag is converter steel slag.
3. The steel slag-based carbon-fixing building material of claim 2, wherein the converter steel slag contains CaO in an amount of 40-60% and has a particle size of 0.05-0.1mm.
4. The steel slag-based carbon-fixing building material of claim 1, wherein SiO in the slag 2 45-55 percent of the total content of the components and 0.1-0.15mm of granularity.
5. The steel slag-based carbon-fixing building material according to claim 1, wherein the magnesite is high-purity magnesite meeting HYT 248-2018 ocean Standard of the people's republic of China.
6. The steel slag-based carbon-fixing building material of claim 1, wherein the cross-linked polymer is a microporous carbon dioxide trap (TPE-CPOP).
7. The steel slag-based carbon-fixing construction material of claim 6, wherein the carbon dioxide capturing agent TPE-CPOP is prepared by using tetraphenylethylene as a precursor, anhydrous 1,2-dichloroethane as a solvent and AlCl 3 Is a product activated by KOH after the reaction of the catalyst and cyanuric chloride.
8. The steel slag-based carbon-fixing building material of claim 1, wherein the steel slag-based carbon-fixing building material is prepared by the following specific steps:
(1) Steel slag: 70-80 parts; slag: 5-10 parts; 4-8 parts of fly ash; magnesia: 5-10 parts; mixing uniformly to obtain a mixture;
(2) Adding water to the mixture of (1): stirring 12-15 parts for 10-15min to obtain an adhesive;
(3) And (3) adding 0.1-0.3 part of cross-linked polymer into the adhesive in the step (2), and stirring for 2-3min to obtain the steel slag-based carbon-fixing building material.
CN202211075339.9A 2022-09-04 2022-09-04 Steel slag-based carbon-fixing building material Active CN115626795B (en)

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CN109053103A (en) * 2018-09-03 2018-12-21 嘉峪关市产品质量计量和特种设备检验检测中心 Steam pressure pseudo-classic architecture brick
CN110040732A (en) * 2019-05-05 2019-07-23 中国科学院上海高等研究院 A kind of alkali metals modified porous carbon materials and its preparation method and application
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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CN108473484A (en) * 2015-10-01 2018-08-31 赛诺米克斯公司 It can be used as the compound of TRPM8 conditioning agents
CN108017377A (en) * 2017-11-22 2018-05-11 海城利尔麦格西塔材料有限公司 A kind of magnesium carborundum zirconia block and its production method
CN109053103A (en) * 2018-09-03 2018-12-21 嘉峪关市产品质量计量和特种设备检验检测中心 Steam pressure pseudo-classic architecture brick
CN110040732A (en) * 2019-05-05 2019-07-23 中国科学院上海高等研究院 A kind of alkali metals modified porous carbon materials and its preparation method and application
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CN114804802A (en) * 2022-04-19 2022-07-29 中国大唐集团科技工程有限公司 Method for preparing carbonized brick by using industrial waste residues

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Address after: 256500 Beijing Bo Industrial Park 009, Boxing County Economic Development Zone, Binzhou City, Shandong Province

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