CN113650160A - Method and device for preparing concrete building material by adding carbon dioxide in stirring process - Google Patents
Method and device for preparing concrete building material by adding carbon dioxide in stirring process Download PDFInfo
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- CN113650160A CN113650160A CN202110992740.8A CN202110992740A CN113650160A CN 113650160 A CN113650160 A CN 113650160A CN 202110992740 A CN202110992740 A CN 202110992740A CN 113650160 A CN113650160 A CN 113650160A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 78
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 78
- 238000003756 stirring Methods 0.000 title claims abstract description 64
- 239000004566 building material Substances 0.000 title claims abstract description 58
- 239000004567 concrete Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000002156 mixing Methods 0.000 claims abstract description 22
- 238000002360 preparation method Methods 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000007711 solidification Methods 0.000 claims abstract description 4
- 230000008023 solidification Effects 0.000 claims abstract description 4
- 239000012258 stirred mixture Substances 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000004568 cement Substances 0.000 abstract description 30
- 239000000463 material Substances 0.000 abstract description 7
- 230000007774 longterm Effects 0.000 abstract description 3
- 229920000876 geopolymer Polymers 0.000 abstract description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 9
- 238000003763 carbonization Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 238000002386 leaching Methods 0.000 description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 229910052712 strontium Inorganic materials 0.000 description 4
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 4
- 229910052792 caesium Inorganic materials 0.000 description 3
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000003487 anti-permeability effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/003—Methods for mixing
- B28C5/006—Methods for mixing involving mechanical aspects
-
- 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
-
- 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
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
- B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
-
- 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
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/0404—Proportioning
- B28C7/0418—Proportioning control systems therefor
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Automation & Control Theory (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention provides a method and a device for preparing a concrete building material by adding carbon dioxide in stirring, wherein the preparation method comprises the following steps: step S1, preparing the raw materials of the concrete building material according to the mixture ratio; step S2, stirring the raw materials in a mixing container, and introducing carbon dioxide in the stirring process to obtain a mixture; and step S3, injecting the stirred mixture into a mold, demolding after solidification, and then curing to obtain a concrete building material finished product. By adopting the technical scheme of the invention, the cement-based building material is prepared by adding carbon dioxide in the stirring process, the materials are fully contacted with the carbon dioxide, the whole is uniformly carbonized, no performance layering exists, and the mechanical property and long-term durability of the hardened cement-based building material are improved; the acid-base environment in the hardened cement-based building material is not influenced; and the method has low process requirement, small control difficulty, low economic cost and good benefit, and is suitable for preparing novel geopolymer green building materials.
Description
Technical Field
The invention belongs to the technical field of building material preparation, and particularly relates to a method and a device for preparing a concrete building material by adding carbon dioxide in stirring.
Background
The carbonization of the cement-based construction material is considered as a durability problem for a long time because the pH value of the material is reduced and the passive film on the surface of the steel bar is further damaged. However, the positive effect of carbonization on improving the performance of cement-based building materials is not negligible, such as: reduce porosity, improve pore structure, strengthen mechanical property, improve anti-permeability performance and the like, and arouse extensive attention and research. In order to fully utilize the positive effect of carbonization and improve the carbonization treatment efficiency, related scholars generally adopt high temperature and high pressure to accelerate the carbonization treatment of the cement-based building materials, and certain effects are achieved. However, the method has the disadvantages of harsh technological conditions and low carbonization efficiency of internal materials, and only achieves the surface treatment effect finally. In general, the existing technology for improving the performance of cement-based building materials by carbonization has the following problems:
1. changing the acid-base environment inside the cement-based building material to further induce other durability problems;
2. the reaction is from outside to inside, the carbonization efficiency of the internal material is low, and the performance layering phenomenon of the internal material and the external material is serious;
3. the process conditions are harsher, and negative effects can be caused if the control is not good, such as: cracks are generated, the strength is reduced, the anti-permeability performance is increased, and the like, so that the popularization is difficult.
Disclosure of Invention
In order to solve the technical problems, the invention discloses a method and a device for preparing a concrete building material by adding carbon dioxide during stirring, wherein the carbon dioxide is added during the stirring process to prepare the cement-based building material, so that the integral carbonization efficiency of the cement-based building material is improved, the process difficulty is reduced, the mechanical property and the long-term durability of the hardened cement-based building material are comprehensively improved, and a green building material concept is advocated.
In contrast, the technical scheme adopted by the invention is as follows:
a preparation method of a concrete building material added with carbon dioxide during stirring comprises the following steps:
step S1, preparing the raw materials of the concrete building material according to the mixture ratio;
step S2, stirring the raw materials in a mixing container, and introducing carbon dioxide in the stirring process to obtain a mixture;
and step S3, injecting the stirred mixture into a mold, demolding after solidification, and then curing to obtain a concrete building material finished product.
By adopting the technical scheme, the raw materials of the cement-based building material before pouring are treated by adopting carbon dioxide, namely, the carbon dioxide is added in the stirring process, the carbon dioxide is fully contacted and reacted with the cement-based building material to generate nano-scale calcium carbonate which is attached to the surface of mineral components, the generated nano-calcium carbonate has high stability (the decomposition temperature is 500-800 ℃), can stably exist in the subsequent hardening process and is filled into the pores among the cement particles of the building material, so that the structure is more compact, the continuity of the microstructure is better, and the mechanical strength and the durability of the cement-based building material are improved.
In a further improvement of the present invention, in step S2, the mixing container is a closed container, and the pressure of introducing carbon dioxide is 0.1 to 0.6 MPa.
As a further improvement of the present invention, the total amount of carbon dioxide is controlled according to the reaction conditions, mainly by two aspects: (1) flow control: pumping carbon dioxide until the accumulated flow reaches a set value, and stopping pumping; (2) pressure control: and pumping carbon dioxide to make the pressure in the reaction kettle reach a set value, and stopping pumping.
As a further improvement of the invention, in the step S2, the treatment time is 25-35min by introducing carbon dioxide.
As a further improvement of the invention, in step S2, the raw materials are stirred in a mixing container for 60-120S at a stirring speed of 30r/min, so that the concrete materials are fully mixed as soon as possible; then carbon dioxide is introduced into the reactor to stir for 30min in the stirring process, the stirring speed is 3-4r/min, and the sufficient carbon dioxide treatment time is ensured. Furthermore, the water in the raw materials is added in batches, so that the phenomenon that the workability of concrete is reduced or segregation is caused due to overlong stirring time is avoided.
The invention also discloses a device for preparing the concrete building material added with the carbon dioxide during stirring, namely the preparation device adopted by the method for preparing the concrete building material added with the carbon dioxide during stirring comprises a mixing container, a carbon dioxide storage container and a flow control unit, wherein the mixing container is provided with a stirring mechanism and an air inlet, an air outlet and the air inlet of the carbon dioxide storage container are connected through a pipeline, and the pipeline is provided with the flow control unit.
As a further improvement of the invention, the flow control unit comprises a flow meter and an electromagnetic valve which are connected in series on the pipeline.
As a further improvement of the present invention, the mixing container is a closed container.
As a further improvement of the invention, the gas outlet of the carbon dioxide storage container is provided with a pressure reducing valve.
As a further improvement of the invention, the stirring mechanism comprises a combined screw-ribbon and screw stirring paddle.
As a further improvement of the invention, the ribbon and screw combined stirring paddle comprises a screw positioned in the middle, a first ribbon and a second ribbon, wherein the first ribbon and the second ribbon rise spirally and are positioned on the outer side of the screw, the first ribbon is connected with the screw, and the first ribbon is positioned between the screw and the second ribbon. By adopting the technical scheme, the cement-based building material rises along the spiral surface of the first spiral belt at the center and falls along the spiral surface of the second spiral belt at the edge to form axial up-and-down circulation so as to be fully contacted with carbon dioxide gas.
As a further improvement of the invention, the spiral directions of the first spiral belt and the second spiral belt form an included angle of 45-135 degrees.
Compared with the prior art, the invention has the beneficial effects that:
according to the technical scheme, the carbon dioxide is added in the stirring process to prepare the cement-based building material, the raw materials are fully contacted with the carbon dioxide in the stirring process, the whole body is uniformly carbonized, the problem of performance layering does not exist, and the mechanical property and the long-term durability of the hardened cement-based building material are improved; the acid-base environment in the hardened cement-based building material is not influenced; and the method has low process requirement, small control difficulty, low economic cost and good benefit, and is suitable for preparing novel geopolymer green building materials. In addition, the greenhouse gas carbon dioxide is fully utilized and converted into solid for storage, so that green building materials are developed.
Drawings
FIG. 1 is a schematic structural view of a concrete building material production apparatus to which carbon dioxide is added during stirring according to an embodiment of the present invention.
FIG. 2 is a schematic view showing the configuration of a stirring paddle in a mixing vessel of the concrete building material production apparatus to which carbon dioxide is added during stirring according to the embodiment of the present invention.
FIG. 3 is a schematic representation of the reaction of carbon dioxide with a cement-based building material in an embodiment of the present invention.
Fig. 4 is an analysis diagram of the leaching result of strontium Sr element at different temperatures in the embodiment of the invention.
FIG. 5 is a graph showing the results of the cesium Cs leaching at different temperatures in the example of the present invention.
FIG. 6 is a graph showing the result of leaching lead and Pb from the solidified body of fly ash cement at different ratios in the example of the present invention.
The reference numerals include:
1-mixing container, 2-carbon dioxide storage container, 3-flowmeter, 4-electromagnetic valve, 5-stirring mechanism, 6-screw, 7-first helical band, 8-second helical band and 9-nano calcium carbonate.
Detailed Description
Preferred embodiments of the present invention are described in further detail below.
A preparation method of a concrete building material added with carbon dioxide during stirring comprises the following steps:
step S1, preparing the raw materials of the concrete building material according to the mixture ratio;
step S2, stirring the raw materials in a mixing container, and introducing carbon dioxide in the stirring process to obtain a mixture;
and step S3, injecting the stirred mixture into a mold, demolding after solidification, and then curing to obtain a concrete building material finished product.
In step S2, the mixing container is a closed container, and the pressure of introducing carbon dioxide is 0.1-0.6 MPa.
For the preparation method, a preparation device shown in fig. 1 is adopted, the preparation device comprises a mixing container 1, a carbon dioxide storage container 2 and a flow control unit, the mixing container 1 is provided with a stirring mechanism 5 and an air inlet, an air outlet and the air inlet of the carbon dioxide storage container 2 are connected through a pipeline, and the pipeline is provided with the flow control unit. The flow control unit comprises a flow meter 3 and an electromagnetic valve 4 which are connected in series on a pipeline. And a pressure reducing valve is arranged at the air outlet of the carbon dioxide storage container 2. The carbon dioxide storage vessel 2 is a high-pressure carbon dioxide storage tank.
According to the embodiment, carbon dioxide is introduced into stirring to prepare a cement-based building material, the stirring gas environment is high-concentration carbon dioxide, the pressure range is 0.1-0.6 MPa, the temperature is normal temperature, a carbon dioxide high-pressure storage tank is a carbon dioxide gas source of a system, and can be equipped with a pressure reducing valve for use, so that the partial pressure of gas in the system is controlled; the flow control unit can be used for monitoring and controlling the addition amount of carbon dioxide and comprises a flowmeter 3 and an electromagnetic valve 4; the closed stirring unit provides a closed carbon dioxide stirring environment for the cement-based building material. The stirred vessel can control the addition of carbon dioxide by both pressure and flow. Pressure control, namely controlling the partial pressure of carbon dioxide gas in the closed stirring unit: the dynamic balance of the air pressure in the stirring unit is realized by adjusting a pressure reducing valve of the carbon dioxide high-pressure storage tank; flow control, i.e. control of the total amount of carbon dioxide added to the closed stirring unit: the flow meter 3 monitors the carbon dioxide cumulative flow rate, and when the target value is reached, the electromagnetic valve 4 is closed.
As shown in fig. 2, the stirring mechanism 5 is a combined stirring paddle of a ribbon and a screw. Spiral shell area + screw rod combination formula stirring rake is including the screw rod 6, first spiral shell area 7 and the second spiral shell area 8 that are located the middle part, first spiral shell area 7 and second spiral shell area 8 are spiral shell's the outside that is located screw rod 6 that rises, first spiral shell area 7 is connected with screw rod 6, first spiral shell area 7 is located between screw rod 6 and the second spiral shell area 8. By adopting the technical scheme, the cement-based building material rises along the spiral surface of the first spiral strip 7 at the center and falls along the spiral surface of the second spiral strip 8 at the edge to form axial up-and-down circulation so as to be fully contacted with carbon dioxide gas. Further, the spiral directions of the first spiral belt 7 and the second spiral belt 8 form an included angle of 45-135 degrees.
In this example, carbon dioxide is fully contacted and reacted with the cement-based building material to generate nano-scale calcium carbonate 9 attached to the surface of the mineral component, and the schematic diagram is shown in fig. 3. The generated nano-scale calcium carbonate 9 has high stability (the decomposition temperature is 500-800 ℃), stably exists in the subsequent hardening process, and is filled in the pores among the cement particles of the building material, so that the structure is more compact, the continuity of the microstructure is better, and the mechanical strength and the durability of the cement-based building material are improved.
Next, the influence of carbon dioxide added during the mixing on the compressive strength of the concrete sample will be described by the present example and comparative example. A1-A3 are samples with different concrete mixing ratios, wherein A4 is the same mixing ratio as A1 in the embodiment, and only carbon dioxide is introduced during the stirring process. The strength test results of the concrete test blocks are shown in table 1, and it can be seen that, by adopting the technical scheme of the embodiment of the invention, after carbon dioxide is introduced during stirring, the compressive strength of the C30 concrete is improved by about 33%, which is equivalent to that of the C40 concrete and only differs by about 3%.
TABLE 1 concrete test block compression Strength test results
The following comparative durability test was carried out by the following specific method: adding compounds containing the elements of the nuclear elements (strontium Sr, cesium Cs) and fly ash admixtures into the cement blocks respectively. The method of the embodiment is adopted to introduce carbon dioxide in the stirring process for treatment, and the leaching amount of harmful elements in the cement solidified body before and after introduction of the carbon dioxide is measured for the obtained concrete finished product according to the test method of GB/T7023-. The leaching rate test results of part of harmful elements are shown in fig. 4-6, and it can be seen that the leaching rate of strontium, cesium and lead elements in the cement solidified body can be greatly reduced by adopting the technical scheme of introducing carbon dioxide during stirring, and particularly for the strontium and lead elements, the introduction of two during stirring is greatly improved.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A preparation method of a concrete building material added with carbon dioxide in stirring is characterized by comprising the following steps:
step S1, preparing the raw materials of the concrete building material according to the mixture ratio;
step S2, stirring the raw materials in a mixing container, and introducing carbon dioxide in the stirring process to obtain a mixture;
and step S3, injecting the stirred mixture into a mold, demolding after solidification, and then curing to obtain a concrete building material finished product.
2. The method for producing a concrete building material to which carbon dioxide is added while stirring according to claim 1, characterized in that: in step S2, the mixing container is a closed container, and the pressure of introducing carbon dioxide is 0.1-0.6 MPa.
3. The method for producing a concrete building material to which carbon dioxide is added while stirring according to claim 1, characterized in that: in step S2, carbon dioxide is introduced for treatment for 25-35 min.
4. The method for producing a concrete building material to which carbon dioxide is added while stirring according to claim 3, characterized in that: in step S2, the raw materials are stirred in a mixing container for 60 to 120S at a stirring speed of 30 r/min; then introducing carbon dioxide in the stirring process, and stirring for 30min at the stirring speed of 3-4 r/min; water was added in batches.
5. The apparatus according to any one of claims 1 to 4, used in the method for producing a concrete structure by adding carbon dioxide while stirring, characterized in that: the device comprises a mixing container, a carbon dioxide storage container and a flow control unit, wherein the mixing container is provided with a stirring mechanism and an air inlet, the air outlet and the air inlet of the carbon dioxide storage container are connected through a pipeline, and the pipeline is provided with the flow control unit.
6. A concrete building material preparation apparatus according to claim 5, wherein the carbon dioxide is added to the mixture, the apparatus comprising: the flow control unit comprises a flowmeter and an electromagnetic valve which are connected in series on a pipeline.
7. A concrete building material preparation apparatus according to claim 5, wherein the carbon dioxide is added to the mixture, the apparatus comprising: the mixing container is a closed container.
8. A concrete building material preparation apparatus according to claim 5, wherein the carbon dioxide is added to the mixture, the apparatus comprising: and a pressure reducing valve is arranged at the air outlet of the carbon dioxide storage container.
9. A concrete building material preparation apparatus according to claim 5, wherein the carbon dioxide is added to the mixture, the apparatus comprising: the stirring mechanism comprises a ribbon and screw combined stirring paddle.
10. A concrete building material preparation apparatus according to claim 9, wherein the carbon dioxide is added to the mixture, and the apparatus comprises: spiral shell area + screw rod combination formula stirring rake is including screw rod, first spiral shell area and the second spiral shell area that is located the middle part, first spiral shell area and second spiral shell area are the outside that the spiral shell ascended to be located the screw rod, first spiral shell area is connected with the screw rod, first spiral shell area is located between screw rod and the second spiral shell area.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114179223A (en) * | 2021-12-15 | 2022-03-15 | 中国矿业大学 | Stirring and maintaining integrated device for storing carbon dioxide by using cement-based material |
| CN114956735A (en) * | 2022-06-15 | 2022-08-30 | 防城港智汇双碳产业研究院 | Machine-made sand pumping concrete for sealing carbon dioxide and preparation method thereof |
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| CN111908939A (en) * | 2020-06-23 | 2020-11-10 | 上海暖丰保温材料有限公司 | Aerated concrete block and preparation method thereof |
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| CN114179223A (en) * | 2021-12-15 | 2022-03-15 | 中国矿业大学 | Stirring and maintaining integrated device for storing carbon dioxide by using cement-based material |
| CN114179223B (en) * | 2021-12-15 | 2022-08-19 | 中国矿业大学 | Stirring and maintaining integrated device for storing carbon dioxide by using cement-based material |
| CN114956735A (en) * | 2022-06-15 | 2022-08-30 | 防城港智汇双碳产业研究院 | Machine-made sand pumping concrete for sealing carbon dioxide and preparation method thereof |
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