CN116199525A - CO (carbon monoxide) 2 Preparation method for preparing calcium carbonate binder through activation - Google Patents
CO (carbon monoxide) 2 Preparation method for preparing calcium carbonate binder through activation Download PDFInfo
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- CN116199525A CN116199525A CN202211075338.4A CN202211075338A CN116199525A CN 116199525 A CN116199525 A CN 116199525A CN 202211075338 A CN202211075338 A CN 202211075338A CN 116199525 A CN116199525 A CN 116199525A
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- Prior art keywords
- calcium carbonate
- activation
- preparing
- carbonate binder
- curing
- Prior art date
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 56
- 239000011230 binding agent Substances 0.000 title claims abstract description 28
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 28
- 230000004913 activation Effects 0.000 title claims abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 title claims description 4
- 238000002360 preparation method Methods 0.000 title description 4
- 239000002893 slag Substances 0.000 claims abstract description 48
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000011777 magnesium Substances 0.000 claims abstract description 32
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 31
- 239000002904 solvent Substances 0.000 claims abstract description 21
- 238000003763 carbonization Methods 0.000 claims abstract description 18
- 239000008240 homogeneous mixture Substances 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 16
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001723 curing Methods 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 11
- 238000013008 moisture curing Methods 0.000 claims abstract description 9
- 150000001412 amines Chemical class 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 239000002002 slurry Substances 0.000 claims description 14
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical group NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 12
- 238000007873 sieving Methods 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000010220 ion permeability Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Images
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
- 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
-
- 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
- C04B30/00—Compositions for artificial stone, not containing binders
Abstract
The invention relates to a CO 2 A method for preparing a calcium carbonate binder by activation comprising the steps of: firstly, adding the screened magnesium slag powder and water into a mixer according to a set water slag ratio, uniformly mixing, and then adding an amine solvent for variable speed stirring to obtain a homogeneous mixture; pouring the homogenized mixture into a mold, preparing paste modules, performing moisture curing, demolding, and pre-drying all paste modules under natural conditions to obtain a blank module; and (3) placing the dried green body module into a carbonization device, and finally injecting carbon dioxide into the device for curing to obtain the required calcium carbonate binder. The CO proposed by the invention 2 The method for preparing the calcium carbonate binder by activation is a self-adaptive low-temperature method combining recycling and direct capturing, converting and storing of carbon dioxide, and is helpful for promoting sustainable resource conversion.
Description
Technical Field
The invention belongs to the field of comprehensive utilization of industrial waste residues, and in particular relates to a CO 2 A preparation method for preparing a calcium carbonate binder by activation.
Background
In the context of reducing carbon dioxide emissions and developing sustainable building materials in the traditional portland cement industry, there is increasing interest in developing low carbon emissions cementitious materials. Carbonate cements are typically produced by CO 2 And Ca/Mg-containing alkaline mineral, and is a carbonic acid activated cementing material. Natural carbonization of cement-based materials is generally believed to adversely affect the durability of the materials, however, it has been found in extensive research that portland cement or recycled aggregate employs CO 2 Curing can reduce the water absorption of concrete, improve the freeze thawing resistance and the chloride ion permeability.
Magnesium slag is an industrial solid waste, forms an alkaline suspension after moisture absorption, and has a stable performance form. Excessive stacking of magnesium slag in soil is easy to cause soil hardening and salinization, endangering crop growth and normal land utilization; the random unordered magnesium slag is accumulated into rivers and underground water, so that the pH value of the water can be changed, and the water resource safety is seriously affected. From the chemical composition, the magnesium slag is mainly composed of CaO and SiO 2 、Al 2 O 3 MgO and Fe 2 O 3 The composition has very high carbonatation activity and can be used as a raw material for preparing carbonate binders.
Disclosure of Invention
The invention aims to provide a CO 2 Preparation method for preparing calcium carbonate binder by activation to solve the problem of existing CO 2 The problems of trapping, utilizing, sealing and unreasonable utilization of magnesium slag.
In order to achieve the above purpose, the present application is implemented by the following technical schemes:
CO (carbon monoxide) 2 A method for preparing a calcium carbonate binder by activation, comprising the steps of:
1) Sieving large particles in industrial magnesium slag (sieving again after the sieved large particles are crushed by a crusher), adding the processed magnesium slag powder into a slurry mixer according to a set water slag ratio, adding an amine solvent into a container, stirring uniformly at a low speed, and stirring at a high speed to obtain a homogeneous mixture;
2) Casting the homogeneous mixture into a mould to prepare a paste module, carrying out moisture curing and demoulding, and pre-drying the paste module under natural conditions to obtain a blank module;
3) And (3) placing the pre-dried blank module in the step (2) into a carbonization chamber, and injecting carbon dioxide into the carbonization chamber for curing to obtain the calcium carbonate binder.
Further, in the step 1), a 150 mu m mesh screen is used for sieving out large particles in industrial magnesium slag, and the mass percentage of CaO in the treated magnesium slag powder is not less than 55 percent, and SiO is used for sieving out the large particles in the industrial magnesium slag 2 The mass percentage content of (2) is not less than 30%.
Further, in the step 1), the water slag ratio W/S is 0.25-0.4.
Further, in step 1), the amine solvent is a monoethanolamine solvent having a concentration of 10-30% wt, and the amine solvent is incorporated in an amount of 30-50% of the water content of the homogeneous mixture.
Further, in step 2), the time of moisture curing is 1-3d, and the pre-drying time is 24h.
Further, in step 3), the concentration of carbon dioxide is 99.9wt% and the pressure is 0.1 to 0.3Mpa.
Further, in the step 3), carbon dioxide is injected into the carbonization chamber for curing for 3-7d.
Compared with the prior art, the invention has the beneficial effects that:
1. the CO proposed by the invention 2 The method for preparing the calcium carbonate binder by activation is to combine and recycle CO 2 Directly captures and converts the carbon dioxide into the form of calcium carbonate, and has the function of permanently sealing the carbon dioxide and economic benefit.
2. The invention prepares the calcium carbonate binder by taking magnesium slag as a raw material, which is helpful for promoting sustainable resource conversion.
3. Magnesium slag in CO 2 And carbonizing under solidification to prepare the calcium carbonate binder with high compressive strength and rapid development.
Drawings
Fig. 1 is a graph of compressive strength of a calcium carbonate binder module.
Detailed Description
The following detailed description of the present invention is provided by way of example only, and is not to be construed as limiting the scope of the invention.
Example 1
Firstly, sieving large particles of magnesium slag by using a 150 mu m mesh screen; adding the treated magnesium slag powder into a slurry mixer at a water-slag ratio (W/S) of 0.25, adding a monoethanolamine solvent into the container, wherein the concentration is 10% by weight, the water-slag ratio (W/S) is unchanged, the content of the monoethanolamine solvent is 30% of the water content of the slurry, stirring at a low speed for 8min, and stirring at a high speed for 5min to obtain a homogeneous mixture; the fresh mixture was then cast into a mold to prepare a sample of cubic paste modules of dimensions 20 x 20 mm. After moisture curing for 1d, demolding the paste modules, and pre-drying all the paste modules for 24+2h under natural conditions to obtain a blank module. And (3) placing the dried green body module into a carbonization chamber, and injecting carbon dioxide with the concentration of 99.9wt% and the pressure of 0.1MPa into the carbonization chamber for curing for 1d to obtain the required calcium carbonate binder.
Example 2
Firstly, sieving large particles of magnesium slag by using a 150 mu m mesh screen; adding the treated magnesium slag powder into a slurry mixer at a water-slag ratio (W/S) of 0.3, adding a monoethanolamine solvent into the container, wherein the concentration is 20% wt, the water-slag ratio (W/S) is unchanged, the content of the monoethanolamine solvent is 40% of the water content of the slurry, stirring at a low speed for 8min, and stirring at a high speed for 5min to obtain a homogeneous mixture; the homogeneous mixture was then cast into a mold to prepare a sample of cubic paste modules having dimensions of 20 x 20 mm. After moisture curing for 2d, demolding the paste modules, and pre-drying all the paste modules for 24+2h under natural conditions to obtain a blank module. And (3) placing the dried green body module into a carbonization chamber, and injecting carbon dioxide with the concentration of 99.9wt% and the pressure of 0.2MPa into the carbonization chamber for curing for 3 days to obtain the required calcium carbonate binder.
Example 3
Firstly, sieving large particles of magnesium slag by using a 150 mu m mesh screen; adding the treated magnesium slag powder into a slurry mixer at a water-slag ratio (W/S) of 0.35, and adding a monoethanolamine solvent into the container, wherein the concentration is 30% wt, the water-slag ratio (W/S) is unchanged, and the content of the monoethanolamine solvent is 50% of the water content of the slurry. Stirring at low speed for 8min, and stirring at high speed for 5min to obtain homogeneous mixture; the homogeneous mixture was then cast into a mold to prepare a sample of cubic paste modules having dimensions of 20 x 20 mm. And after the wet curing for 3d, demolding the paste module, and pre-drying the paste module for 24+2h under natural conditions to obtain a blank module. And (3) placing the dried green body module into a carbonization chamber, and injecting carbon dioxide with the concentration of 99.9wt% and the pressure of 0.3MPa into the carbonization chamber for curing for 7d to obtain the required calcium carbonate binder.
Example 4
Firstly, sieving large particles of magnesium slag by using a 150 mu m mesh screen; adding the treated magnesium slag powder into a slurry mixer at a water-slag ratio (W/S) of 0.4, and adding a monoethanolamine solvent into the container, wherein the concentration is 30% by weight, the water-slag ratio (W/S) is unchanged, and the doping amount of the monoethanolamine solvent is 20% of the water content of the slurry. Stirring at low speed for 8min, and stirring at high speed for 5min to obtain homogeneous mixture; the homogeneous mixture was then cast into a mold to prepare a sample of cubic paste modules having dimensions of 20 x 20 mm. After moisture curing for 2d, demolding the paste modules, and pre-drying all the paste modules for 24+2h under natural conditions to obtain a blank module. And (3) placing the dried green body module into a carbonization chamber, and injecting carbon dioxide with the concentration of 99.9wt% and the pressure of 0.3MPa into the carbonization chamber for curing for 3 days to obtain the required calcium carbonate binder.
Example 5
Firstly, sieving large particles of magnesium slag by using a 150 mu m mesh screen; adding the treated magnesium slag powder into a slurry mixer at a water-slag ratio (W/S) of 0.35, and adding a monoethanolamine solvent into the container, wherein the concentration is 20% by weight, and the mixing amount of the water-slag ratio (W/S) constant solvent is 50% of the water content of the slurry. Stirring at low speed for 8min, and stirring at high speed for 5min to obtain homogeneous mixture; the homogeneous mixture was then cast into a mold to prepare a sample of cubic paste modules having dimensions of 20 x 20 mm. And after the wet curing for 3d, demolding the paste module, and pre-drying the paste module for 24+2h under natural conditions to obtain a blank module. And (3) placing the dried green body module into a carbonization chamber, and injecting carbon dioxide with the concentration of 99.9wt% and the pressure of 0.1MPa into the carbonization chamber for curing for 7d to obtain the required calcium carbonate binder.
Comparative example
Taking example 1 as an example, in each example, CO was used 2 The cubic block before curing was used as a comparative example. Firstly, sieving large particles of magnesium slag by using a 150 mu m mesh screen; adding the treated magnesium slag powder into a slurry mixer at a water-slag ratio (W/S) of 0.25, and adding a monoethanolamine solvent into the container, wherein the concentration is 10% wt, the water-slag ratio (W/S) is unchanged, and the content of the monoethanolamine solvent is 30% of the water content of the slurry. Stirring at low speed for 8min, and stirring at high speed for 5min to obtain homogeneous mixture; the homogeneous mixture was then cast into a mold to prepare a sample of cubic paste modules having dimensions of 20 x 20 mm. After moisture curing for 1d, demolding the paste modules, and pre-drying all the paste modules for 24+2h under natural conditions to obtain a comparison green body module.
The main components and contents of magnesium slag after being processed by a 150 μm mesh screen in each example are shown in Table 1 below:
table 1 main component and content of magnesium slag after treatment
| Composition of the components | CaO | SiO 2 | MgO | Al 2 O 3 | Fe 2 O 3 |
| Content (%) | 60.05 | 32.12 | 2.73 | 0.72 | 3.12 |
Table 2 shows the parameters and compressive strength of each example
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (7)
1. CO (carbon monoxide) 2 A method for preparing a calcium carbonate binder by activation, comprising the steps of:
1) Sieving large particles in industrial magnesium slag, adding the processed magnesium slag powder into a slurry mixer according to a set water-slag ratio, adding an amine solvent into a container, stirring uniformly at a low speed, and stirring at a high speed to obtain a homogeneous mixture;
2) Casting the homogeneous mixture into a mould to prepare a paste module, carrying out moisture curing and demoulding, and pre-drying the paste module under natural conditions to obtain a blank module;
3) And (3) placing the pre-dried blank module in the step (2) into a carbonization chamber, and injecting carbon dioxide into the carbonization chamber for curing to obtain the calcium carbonate binder.
2. The CO according to claim 1 2 The method for preparing the calcium carbonate binder by activation is characterized in that in the step 1), a 150 mu m mesh screen is used for sieving large particles in industrial magnesium slag, and the mass percentage of CaO in the treated magnesium slag powder is not less than 55 percent, and SiO is used for preparing the calcium carbonate binder by activation 2 The mass percentage content of (2) is not less than 30%.
3. The CO according to claim 1 2 The method for preparing the calcium carbonate binder by activation is characterized in that in the step 1), the water-slag ratio W/S is 0.25-0.4.
4. The CO according to claim 1 2 The method for preparing the calcium carbonate binder by activation is characterized in that in the step 1), the amine solvent is monoethanolamine solvent, the concentration is 10-30% wt, and the mixing amount of the amine solvent is 30-50% of the water content in the homogeneous mixture.
5. The CO according to claim 1 2 The method for preparing the calcium carbonate binder by activation is characterized in that in the step 2), the time of moisture curing is 1-3d, and the pre-drying time is 24h.
6. The CO according to claim 1 2 A process for preparing a calcium carbonate binder by activation, characterized in that in step 3) the concentration of carbon dioxide is 99.9 wt.% and the pressure is 0.1-0.3Mpa.
7. The CO according to claim 1 2 A method for preparing a calcium carbonate binder by activation is characterized in thatIn the step 3), carbon dioxide is injected into the carbonization chamber for curing for 3-7d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211075338.4A CN116199525A (en) | 2022-09-04 | 2022-09-04 | CO (carbon monoxide) 2 Preparation method for preparing calcium carbonate binder through activation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211075338.4A CN116199525A (en) | 2022-09-04 | 2022-09-04 | CO (carbon monoxide) 2 Preparation method for preparing calcium carbonate binder through activation |
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| CN116199525A true CN116199525A (en) | 2023-06-02 |
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| CN202211075338.4A Pending CN116199525A (en) | 2022-09-04 | 2022-09-04 | CO (carbon monoxide) 2 Preparation method for preparing calcium carbonate binder through activation |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1401605A (en) * | 2002-09-07 | 2003-03-12 | 朱广东 | Method for making brick with slag form smelting magnesium by Pidgeon process |
| CN109485360A (en) * | 2018-12-28 | 2019-03-19 | 西安交通大学 | A kind of building moulding material produced using magnesium-smelting silicothermic process waste residue as raw material and its method |
| CN113200764A (en) * | 2021-05-25 | 2021-08-03 | 陕西省建筑科学研究院有限公司 | Homogeneous carbonization preparation method of magnesium slag cementing material for silicothermic process magnesium smelting |
| US20210284576A1 (en) * | 2018-08-01 | 2021-09-16 | Universidade Da Beira Interior | Process for obtaining cao-mgo binders and construction products with reuse of subproducts and/or residues and absorption of carbon dioxide |
| CN114290511A (en) * | 2021-12-23 | 2022-04-08 | 湖南大学 | Method for enhancing carbon dioxide solid existence in cement-based material |
-
2022
- 2022-09-04 CN CN202211075338.4A patent/CN116199525A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1401605A (en) * | 2002-09-07 | 2003-03-12 | 朱广东 | Method for making brick with slag form smelting magnesium by Pidgeon process |
| US20210284576A1 (en) * | 2018-08-01 | 2021-09-16 | Universidade Da Beira Interior | Process for obtaining cao-mgo binders and construction products with reuse of subproducts and/or residues and absorption of carbon dioxide |
| CN109485360A (en) * | 2018-12-28 | 2019-03-19 | 西安交通大学 | A kind of building moulding material produced using magnesium-smelting silicothermic process waste residue as raw material and its method |
| CN113200764A (en) * | 2021-05-25 | 2021-08-03 | 陕西省建筑科学研究院有限公司 | Homogeneous carbonization preparation method of magnesium slag cementing material for silicothermic process magnesium smelting |
| CN114290511A (en) * | 2021-12-23 | 2022-04-08 | 湖南大学 | Method for enhancing carbon dioxide solid existence in cement-based material |
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