Complexing functional material for reducing carbon emission of cement

Abstract

The invention discloses a complexing functional material for reducing cement carbon emission, and belongs to the technical field of low-carbon cementing materials, the complexing functional material for reducing cement carbon emission is composed of the following components: a calcium-iron complexing component, an aluminum complexing component, a complexing anion regulating component, a metal cation regulating component, a pH regulating component, a hydration regulating component and a solvent, the complexing functional material for reducing the carbon emission of the cement, provided by the invention, adopts environment-friendly and stable raw materials, ensures that each component achieves a better synergistic effect, and can meet the requirements of improving the performance of the cement and reducing the carbon emission when being added in a cement grinding or cement application process.

Description

Technical Field

[0001] The present invention belongs to the technical field of low-carbon cementitious materials, and particularly relates to a complexing functional material for reducing the carbon emissions of cement. Background Art

[0002] China is a major cement-producing country, with the annual cement production accounting for about half of the world's total cement production, and the annual carbon emissions being about 1 billion tons. Therefore, it is extremely urgent to reduce the carbon emissions of cement. Research shows that the carbon emissions during the clinker calcination process account for about 90% of the total carbon emissions in cement production. Therefore, reducing the clinker consumption is an important way to reduce carbon emissions in cement production. However, clinker is a key component determining the performance of cement. Therefore, how to ensure the performance of cement while reducing the proportion of clinker used is a major technical problem faced by cement enterprises.

[0003] Alkanolamine materials are currently a relatively common type of cement admixture in China, mainly including triethanolamine, triisopropanolamine, diethanolmonoisopropanolamine, etc. Alkanolamine materials improve the cement performance by promoting cement hydration, so as to reduce the clinker consumption and carbon emissions. However, at the same time, alkanolamine materials have problems such as inhibiting the precipitation formation of hydration products and limited carbon reduction effect. Relying solely on alkanolamine materials is no longer sufficient to meet the actual needs of current carbon emission reduction in cement. Therefore, developing a functional material with more excellent effects is of great significance for cement enterprises to reduce carbon emissions and production costs. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a complexing functional material for reducing the carbon emissions of cement. While achieving the purpose of reducing the clinker consumption and carbon emissions, the complexing functional material for reducing the carbon emissions of cement in the present invention does not have the problem of limited carbon reduction effect caused by inhibiting the precipitation formation of hydration products.

[0005] To achieve the above purpose, the present invention provides a complexing functional material for reducing the carbon emissions of cement, which is composed of the following components: calcium-iron complexing component, aluminum complexing component, complexing anion regulation component, metal cation regulation component, pH regulation component, hydration regulation component and solvent.

[0006] Further, based on the total weight of the cement, the complexing functional material for reducing the carbon emission of cement is composed of the following components by weight percentage: 0.010% - 0.020% of calcium-iron complexing component, 0.0010% - 0.0050% of aluminum complexing component, 0.00% - 0.080% of complexing anion regulating component, 0.00% - 0.060% of metal cation regulating component, 0.00% - 0.060% of pH regulating component, 0.00% - 0.010% of hydration regulating component, and 0.00% - 0.050% of solvent, wherein the complexing anion regulating component, metal cation regulating component, pH regulating component, hydration regulating component, and solvent are not simultaneously 0.00.

[0007] Furthermore, based on the total weight of the cement, the complexing functional material for reducing the carbon emission of cement is composed of the following components by weight percentage: 0.013% - 0.017% of calcium-iron complexing component, 0.0020% - 0.0030% of aluminum complexing component, 0.020% - 0.060% of complexing anion regulating component, 0.010% - 0.040% of metal cation regulating component, 0.010% - 0.020% of pH regulating component, 0.0030% - 0.0070% of hydration regulating component, and 0.010% - 0.025% of solvent.

[0008] The calcium-iron complexing component is selected from at least one of ethylenediaminetetraacetic acid, tetrahydroxyethylenediamine, and diethanolmonoisopropanolamine; and / or

[0009] The complexing anion regulating component is selected from at least one of sodium thiocyanate, calcium thiocyanate, and potassium thiocyanate; and / or

[0010] The metal cation regulating component is selected from at least one of sodium chloride, calcium chloride, and calcium nitrate; and / or

[0011] The pH regulating component is selected from at least one of sodium hydroxide, glycine, and N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid sodium salt; and / or

[0012] The hydration regulating component is selected from at least one of sucrose and hydroquinone.

[0013] Preferably, the calcium-iron complexing component is selected from at least one of ethylenediaminetetraacetic acid and diethanolmonoisopropanolamine; and / or

[0014] The complexing anion regulating component is sodium thiocyanate;

[0015] The pH regulating component is selected from at least one of glycine and N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid sodium salt.

[0016] Preferably, the hydration regulating component is composed of sucrose and hydroquinone in a weight ratio of 1:1.

[0017] Further, the aluminum complex component is a phosphonate complexing agent.

[0018] Exemplarily, the phosphonate complexing agent is selected from at least one of sodium ethylene diamine tetra (methylene phosphonate), sodium hydroxyethane diphosphonate, and sodium diethylenetriamine penta (methylene phosphonate).

[0019] Further, the solvent is glycerol.

[0020] The principle of the present invention is as follows: The complexing components (calcium-iron complexing component and aluminum complexing component) introduced in the complexing functional material for reducing cement carbon emissions of the present invention will form complexes with metal ions in the liquid phase during the cement hydration process, increasing the dissolution of mineral phases. However, whether the complexed metal ions can participate in the precipitation reaction is highly related to the stability of the complex, which can be characterized by the complexation equilibrium constant K 稳 and the precipitation equilibrium constant K 沉 . If K 沉 >K 稳 , then the reaction tends to proceed in the precipitation direction, and the complexed metal ions can participate in the formation of precipitation, which means that while the complexing component increases the dissolution of mineral phases, it also promotes the formation of precipitation, effectively improving the performance; but if K 稳 >K 沉 , then the complexed metal ions will remain in the complexed state and are not easily involved in the precipitation reaction, which means that the complexing component increases the dissolution of mineral phases by forming complexes, but inhibits the formation of precipitation, resulting in problems such as the mismatch between the solubilization effect of the complexing component and the formation of precipitation, and limited performance improvement. In the liquid phase environment, complexing anions, metal cations, and pH value can all affect the stability of the complex. The main reason is that metal cations will form complexes with the complexing component, and there is a competition mechanism. Complexing anions with complexing ability can complex with metal cations, and they will compete with the original complexing body of the complex for the central ion, resulting in dissociation. The change of the alkalinity of the liquid phase system will affect the degree of dissociation of the complex, thus affecting the stability of the complex. Therefore, in order to avoid the situation where the complexing component inhibits precipitation and effectively improve the performance of cement, the present invention synergistically intervenes in the liquid phase environment by means such as adding complexing anion regulating components, cation regulating components, pH regulating components, etc., and affects the stability of the formed complex and intervenes in the complexation equilibrium through the competitive effects of different components on the complex, so as to achieve the purpose of promoting the formation of precipitation while the complexing component increases the dissolution of mineral phases, and further improving the performance of cement.

[0021] The present invention also provides the application of the above-mentioned complexing functional material for reducing cement carbon emissions in reducing cement carbon emissions.

[0022] When the complexing functional material for reducing the carbon emissions of cement in the present invention is applied to reduce the carbon emissions of cement, the complexing functional material for reducing the carbon emissions of cement is added during the cement grinding or cement application process.

[0023] Compared with the prior art, the present invention has the following advantages and technical effects:

[0024] The complexing functional material for reducing the carbon emissions of cement provided by the present invention uses environmentally friendly and stable raw materials to ensure that each component achieves a better synergistic effect. Added during the cement grinding or cement application process, it can meet the requirements of improving cement performance and reducing carbon emissions. Calcium-iron complexing components with better complexing effects on Ca 2+ and Fe 3+ are respectively selected, and aluminum complexing components with outstanding complexing ability for Al 3+ are selected. Different complexing components cooperate to obtain a more excellent complexing effect, which has a positive promoting effect on the dissolution of cement clinker, gypsum and admixtures. On this basis, components such as complexing anion regulating components, metal cation regulating components, and pH regulating components are used to regulate the liquid phase environment. Among them, thiocyanate as the complexing anion regulating component and inorganic salts as the metal cation regulating component have a smaller dosage selected in the present invention compared with traditional cement early strength agents, which is more conducive to regulating the complexing equilibrium process. Therefore, adding the above liquid phase regulating components according to the preferred dosage can effectively intervene in the stability of the complex structure, affect the dissolution-complexation-precipitation equilibrium during hydration, making it beneficial to the dissolution of mineral phases and promoting the formation of key hydration products, and solving the problem that the solubilization effect of alkanolamine materials does not fully match the performance improvement and the performance improvement effect is limited. When the complexing functional material for reducing the carbon emissions of cement prepared by the present invention is added according to the dosage of the present invention, the carbon emissions of cement can be reduced by 11.7%-17.1%. Description of the Drawings

[0025] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 is the concentration of Fe 3+ in the liquid phase due to the complexing effect of the calcium-iron complexing component (diethanol monoisopropanolamine) and the intervention of the complexing anion regulating component (sodium thiocyanate) on the complexing effect of the calcium-iron complexing component (diethanol monoisopropanolamine);

[0027] Figure 2 is the thermogravimetric TG-DTG curve of the cement mortar due to the complexing effect of the calcium-iron complexing component (diethanol monoisopropanolamine) and the intervention of the complexing anion regulating component (sodium thiocyanate) on the complexing effect of the calcium-iron complexing component (diethanol monoisopropanolamine), where the age of the cement mortar specimen is three days;

[0028] Figure 3 The influence of the complexing effect of the calcium-iron complexing component (diethanolmonoisopropanolamine) and the intervention of the complexing anion regulating component (sodium thiocyanate) on the complexing effect of the calcium-iron complexing component (diethanolmonoisopropanolamine) on the strength of cement mortar at each age. Detailed implementation manners

[0029] Now, various exemplary implementation manners of the present invention will be described in detail. This detailed description should not be regarded as a limitation of the present invention, but should be understood as a more detailed description of certain aspects, characteristics and implementation manners of the present invention.

[0030] It should be understood that the terms described in the present invention are only for describing specific implementation manners and are not used to limit the present invention. Additionally, for the numerical ranges in the present invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each intermediate value within any stated value or stated range, as well as each smaller range between any other stated value or intermediate value within the stated range, is also included in the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0031] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. Although the present invention only describes preferred methods and materials, any methods and materials similar or equivalent to those described herein can also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials related to the documents. In case of conflict with any incorporated document, the content of this specification shall prevail.

[0032] Without departing from the scope or spirit of the present invention, various improvements and changes can be made to the specific implementation manners of the description of the present invention, which are obvious to those skilled in the art. Other implementation manners obtained from the description of the present invention are obvious to those skilled in the art. The description and examples of the present invention are only exemplary.

[0033] Regarding the terms "comprising", "including", "having", "containing", etc. used herein, they are all open-ended terms, meaning including but not limited to.

[0034] Unless otherwise specified, the room temperature in the present invention is uniformly calculated as 25 ± 2°C.

[0035] The term "clinker" refers to a material made by heating limestone (calcium carbonate) together with other materials (such as clay) to about 1450°C in a kiln in a process called calcination, whereby carbon dioxide molecules are released from calcium carbonate to form calcium oxide or quicklime, and then it is admixed with other materials already included in the mixture to form calcium silicate and other cementitious compounds.

[0036] In the following examples and comparative examples of the present invention, "slag" refers to granulated blast furnace slag, and "slag" refers to coal combustion slag.

[0037] An embodiment of the present invention provides a complexing functional material for reducing the carbon emission of cement, which is composed of the following components: calcium-iron complexing component, aluminum complexing component, complexing anion regulating component, metal cation regulating component, pH regulating component, hydration regulating component and solvent.

[0038] In some embodiments of the present invention, the complexing functional material for reducing the carbon emission of cement is composed of the following components by weight percentage based on the total weight of the cement: 0.010%-0.020% of calcium-iron complexing component, 0.0010%-0.0050% of aluminum complexing component, 0.00%-0.080% of complexing anion regulating component, 0.00%-0.060% of metal cation regulating component, 0.00%-0.060% of pH regulating component, 0.00%-0.010% of hydration regulating component and 0.00%-0.050% of solvent, wherein the complexing anion regulating component, metal cation regulating component, pH regulating component, hydration regulating component and solvent are not simultaneously 0.00. Preferably, the complexing functional material for reducing the carbon emission of cement is composed of the following components by weight percentage based on the total weight of the cement: 0.013%-0.017% of calcium-iron complexing component, 0.0020%-0.0030% of aluminum complexing component, 0.020%-0.060% of complexing anion regulating component, 0.010%-0.040% of metal cation regulating component, 0.010%-0.020% of pH regulating component, 0.0030%-0.0070% of hydration regulating component and 0.010%-0.025% of solvent.

[0039] In some embodiments of the present invention, the calcium-iron complexing component is selected from at least one of ethylenediaminetetraacetic acid, tetrahydroxyethylenediamine, and diethanolmonoisopropanolamine; the complexing anion regulating component is selected from at least one of sodium thiocyanate, calcium thiocyanate, and potassium thiocyanate; the metal cation regulating component is selected from at least one of sodium chloride, calcium chloride, and calcium nitrate; the pH regulating component is selected from at least one of sodium hydroxide, glycine, and N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid sodium salt; the hydration regulating component is selected from at least one of sucrose and hydroquinone. Preferably, the calcium-iron complexing component is selected from at least one of ethylenediaminetetraacetic acid and diethanolmonoisopropanolamine; the complexing anion regulating component is sodium thiocyanate; the pH regulating component is selected from at least one of glycine and N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid sodium salt; the hydration regulating component is composed of sucrose and hydroquinone in a weight ratio of 1:1; the aluminum complexing component is a phosphonate complexing agent, and the phosphonate complexing agent is selected from at least one of sodium ethylenediaminetetramethylenephosphonate, sodium hydroxyethylethylenediphosphonate, and sodium diethylenetriaminepentamethylenephosphonate; the solvent is glycerol. Taking the influence of diethanolmonoisopropanolamine and sodium thiocyanate on Fe 3+ in the liquid phase as an example to illustrate the action principle of the complexing component and the liquid phase regulating component. During the hydration process, the calcium-iron complexing component diethanolmonoisopropanolamine complexes with Fe 3+ in the liquid phase to form a complex, thereby further promoting the dissolution of the mineral phase, as shown in Equation (1). After introducing the complexing anion regulating component sodium thiocyanate, since the thiocyanate ion has a certain ability to complex iron, it will compete with the complex formed in Equation (1) for Fe 3+ , affecting the stability of the complex, so as to achieve the purpose of increasing the dissolution of the mineral phase, promoting the formation of key hydration products, and improving the performance of the cement-based composite material. The principle is shown in Equation (2).

[0040] nDEIPA + Fe 3+ → [nDEIPA-Fe] 3+ (1)

[0041] Fe 3+ + nSCN - = [Fe(SCN) n (3-n)+ (2)

[0042] The complexing components (calcium-iron complexing component and aluminum complexing component) introduced in the complexing functional material for reducing the cement carbon emission of the present invention will form complexes with metal ions in the liquid phase during the cement hydration process, increasing the dissolution of the mineral phase. However, whether the complexed metal ions can participate in the precipitation reaction is greatly related to the stability of the complex, which can be characterized by the complexation equilibrium constant K 稳 and the precipitation equilibrium constant K 沉 . If K 沉 >K 稳 ​, the reaction tends to proceed in the direction of precipitation. The complexed metal ions can participate in the formation of the precipitate, which means that while the complexing component increases the dissolution of the mineral phase, it also promotes the formation of the precipitate, effectively improving the performance. However, if K 稳 >K 沉 , the complexed metal ions will remain in the complexed state and are not easily involved in the precipitation reaction. This shows that the complexing component increases the dissolution of the mineral phase by forming complexes, but inhibits the formation of the precipitate, resulting in problems such as the mismatch between the solubilization effect of the complexing component and the formation of the precipitate, and limited performance improvement. In the liquid phase environment, complexing anions, metal cations, and pH value can all affect the stability of the complex. The main reason is that metal cations will form complexes with the complexing component, and there is a competition mechanism. Anions with complexing ability can complex with metal cations, and they will compete with the original complexing body of the complex for the central ion, resulting in dissociation. The change in the alkalinity of the liquid phase system will affect the degree of dissociation of the complex, thereby affecting the stability of the complex. Therefore, in order to avoid the situation where the complexing component inhibits precipitation and effectively improve the performance of cement, the present invention synergistically intervenes in the liquid phase environment by adding means such as complexing anion regulating components, cation regulating components, and pH regulating components, and uses the competitive effects of different components on the complex to affect the stability of the formed complex and intervene in the complexation equilibrium, so as to achieve the purpose of promoting the formation of the precipitate while the complexing component increases the dissolution of the mineral phase, and further improving the performance of cement.

[0043] The complex functional material for reducing cement carbon emissions prepared in the embodiments of the present invention can be used in reducing cement carbon emissions.

[0044] When the complex functional material for reducing cement carbon emissions prepared in the embodiments of the present invention is applied in reducing cement carbon emissions, the complex functional material for reducing cement carbon emissions is added during cement grinding or cement application.

[0045] In the following examples, those not specified in specific conditions are carried out according to conventional conditions or conditions recommended by the manufacturer. Reagents or instruments not specified in the manufacturer are all conventional products that can be obtained through commercial purchase.

[0046] It should be noted that the details not described in the embodiments of the present invention are all conventional operation means in the art and are not the focus of the present invention.

[0047] The technical solutions of the present invention are further described below through examples.

[0048] Example 1

[0049] In this embodiment, the mass ratio of cement raw materials is as follows: clinker 65%, gypsum 5%, slag 5%, furnace slag 10%, and limestone 15%. Based on the total weight of the cement, the complex functional material for reducing the carbon emission of cement in this embodiment is composed of the following components by weight percentage: tetra-hydroxyethylenediamine 0.015%, diethylenetriamine pentamethylenephosphonic acid 0.0025%, sodium thiocyanate 0.030%, sodium chloride 0.020%, glycine 0.012%, glycerol 0.015%, hydration regulation component 0.0070%, where the hydration regulation component is composed of sucrose and hydroquinone in a weight ratio of 1:1.

[0050] Example 2

[0051] In this embodiment, the mass ratio of cement raw materials is as follows: clinker 63%, gypsum 5%, slag 5%, furnace slag 12%, and limestone 15%. Based on the total weight of the cement, the complex functional material for reducing the carbon emission of cement in this embodiment is composed of the following components by weight percentage: ethylenediaminetetraacetic acid 0.015%, hydroxyethane diphosphonic acid sodium salt 0.0025%, sodium thiocyanate 0.030%, calcium nitrate 0.020%, N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid sodium salt 0.012%, glycerol 0.015%, hydration regulation component 0.0070%, where the hydration regulation component is composed of sucrose and hydroquinone in a weight ratio of 1:1.

[0052] Example 3

[0053] In this embodiment, the mass ratio of cement raw materials is as follows: clinker 61%, gypsum 5%, slag 5%, furnace slag 14%, and limestone 15%. Based on the total weight of the cement, the complex functional material for reducing the carbon emission of cement in this embodiment is composed of the following components by weight percentage: diethanol monoisopropanolamine 0.015%, ethylenediamine tetramethylenephosphonic acid sodium salt 0.0025%, sodium thiocyanate 0.030%, calcium chloride 0.020%, glycine 0.012%, glycerol 0.015%, hydration regulation component 0.0070%, where the hydration regulation component is composed of sucrose and hydroquinone in a weight ratio of 1:1.

[0054] Example 4

[0055] In this embodiment, the mass ratio of cement raw materials is as follows: clinker 65%, gypsum 5%, slag 5%, furnace slag 10%, and limestone 15%. Based on the total weight of the cement, the complexing functional material for reducing cement carbon emissions in this embodiment is composed of the following components by weight percentage: calcium-iron complexing component (0.020%), aluminum complexing component 0.0030%, calcium thiocyanate 0.030%, calcium chloride 0.020%, glycine 0.012%, glycerol 0.015%, hydroquinone 0.0050%. Among them, the calcium-iron complexing component is composed of ethylenediaminetetraacetic acid and diethanolmonoisopropanolamine in a weight ratio of 1:1, and the aluminum complexing component is composed of sodium diethylenetriaminepenta(methylene phosphonate) and sodium ethylenediaminetetra(methylene phosphonate) in a weight ratio of 1:1.

[0056] Example 5

[0057] In this embodiment, the mass ratio of cement raw materials is as follows: clinker 67%, gypsum 5%, slag 5%, furnace slag 8%, and limestone 15%. Based on the total weight of the cement, the complexing functional material for reducing cement carbon emissions in this embodiment is composed of the following components by weight percentage: calcium-iron complexing component (0.020%), aluminum complexing component 0.0030%, potassium thiocyanate 0.030%, calcium nitrate 0.020%, sodium hydroxide 0.020%, glycerol 0.015%, hydroquinone 0.0050%. Among them, the calcium-iron complexing component is composed of ethylenediaminetetraacetic acid and diethanolmonoisopropanolamine in a weight ratio of 1:1, and the aluminum complexing component is composed of sodium ethylenediaminetetra(methylene phosphonate), hydroxyethane diphosphonic acid, and sodium diethylenetriaminepenta(methylene phosphonate) in a weight ratio of 1:1.

[0058] Example 6

[0059] In this embodiment, the mass ratio of cement raw materials is as follows: clinker 64%, gypsum 5%, slag 5%, furnace slag 11%, and limestone 15%. Based on the total weight of the cement, the complexing functional material for reducing cement carbon emissions in this embodiment is composed of the following components by weight percentage: diethanolmonoisopropanolamine 0.015%, sodium ethylenediaminetetra(methylene phosphonate) 0.0025%, complexing anion regulation component 0.050%, glycine 0.010%, glycerol 0.015%, hydroquinone 0.0030%. Among them, the complexing anion regulation component is composed of sodium thiocyanate and potassium thiocyanate in a weight ratio of 1:1.

[0060] Example 7

[0061] In this embodiment, the mass ratio of cement raw materials is as follows: clinker 66%, gypsum 5%, slag 5%, furnace slag 9%, and limestone 15%. Based on the total weight of the cement, the complexing functional material for reducing cement carbon emissions in this embodiment is composed of the following components by weight percentage: diethanol monoisopropanolamine 0.010%, sodium ethylene diamine tetra(methylene phosphonate) 0.0010%, calcium thiocyanate 0.030%, calcium chloride 0.020%, glycine 0.012%, glycerol 0.015%, hydroquinone 0.0060%.

[0062] Example 8

[0063] In this embodiment, the mass ratio of cement raw materials is as follows: clinker 64%, gypsum 5%, slag 5%, furnace slag 11%, and limestone 15%. Based on the total weight of the cement, the complexing functional material for reducing cement carbon emissions in this embodiment is composed of the following components by weight percentage: diethanol monoisopropanolamine 0.013%, sodium hydroxyethane diphosphonate 0.0020%, metal cation regulation component 0.040%, glycine + N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid sodium salt 0.016%, glycerol 0.015%, hydration regulation component 0.0070%, wherein the metal cation regulation component is composed of calcium nitrate and sodium chloride in a weight ratio of 1:1, and the hydration regulation component is composed of sucrose and hydroquinone in a weight ratio of 1:1.

[0064] Example 9

[0065] In this embodiment, the mass ratio of cement raw materials is as follows: clinker 67%, gypsum 5%, slag 5%, furnace slag 8%, and limestone 15%. Based on the total weight of the cement, the complexing functional material for reducing cement carbon emissions in this embodiment is composed of the following components by weight percentage: diethanol monoisopropanolamine 0.017%, diethylenetriamine penta(methylene phosphonic acid) 0.0030%, pH regulation component 0.018%, glycerol 0.020%, hydration regulation component 0.0070%, wherein the pH regulation component is composed of sodium hydroxide, glycine, and N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid sodium salt in a weight ratio of 1:1, and the hydration regulation component is composed of sucrose and hydroquinone in a weight ratio of 1:1.

[0066] Example 10

[0067] In this embodiment, the mass ratio of cement raw materials is as follows: clinker 67%, gypsum 5%, slag 5%, furnace slag 8%, and limestone 15%. Based on the total weight of the cement, the complexing functional material for reducing the carbon emissions of cement in this embodiment is composed of the following components by weight percentage: diethanol monoisopropanolamine 0.020%, sodium ethylene diamine tetra (methylene phosphonate) 0.0050%, complexing anion regulation component 0.060%, glycerol 0.025%, hydration regulation component 0.0070%. The complexing anion regulation component is composed of sodium thiocyanate and calcium thiocyanate in a weight ratio of 1:1, and the hydration regulation component is composed of sucrose and hydroquinone in a weight ratio of 1:1.

[0068] The carbon emission reduction effects of the complexing functional materials for reducing the carbon emissions of cement in the above embodiments were tested, and a blank group without adding the complexing functional material was set. The mass ratio of cement raw materials in the blank group is as follows: clinker 80%, gypsum 5%, slag 5%, and limestone 10%. The main chemical composition of the clinker is shown in Table 1. After grinding, the performance of the cement was detected according to the cement mortar strength test method in GB / T 17671, and the obtained results are shown in Table 2, and the reduction of cement carbon emissions is shown in Table 3.

[0069] Table 1 Main chemical composition of cement clinker (wt%)

[0070] Component CaO <![CDATA[SiO 2 > <![CDATA[Al 2 O 3 > MgO <![CDATA[SO 3 > <![CDATA[Fe 2 O 3 > Loss on Ignition Proportion 65.72 23.51 5.95 1.56 0.47 3.39 0.23

[0071] Table 2 Performance test results

[0072]

[0073] It was found from Table 2 that adding the complexing functional material for reducing the carbon emissions of cement in the present invention can basically maintain the original performance of the cement while reducing the amount of clinker used. It was mentioned in the background technology that the carbon emissions during the clinker calcination process account for about 90% of the total carbon emissions in cement production. Therefore, through the corresponding clinker proportion in Table 2, the corresponding reduction in the amount of clinker used can be obtained, and then multiplied by the proportion of clinker carbon emissions in the total carbon emissions of cement production to estimate the reduction in cement carbon emissions of the complexing functional materials for reducing the carbon emissions of cement in each embodiment (i.e., Table 3). The reduction in cement carbon emissions is expressed by the reduction ratio of cement carbon emissions. Reduction ratio of cement carbon emissions (%) = reduction in clinker amount × proportion of clinker carbon emissions in total carbon emissions of cement production × 100%.

[0074] Table 3 Reduction in cement carbon emissions for each group

[0075] Group Reduce the Cement Carbon Emission Ratio Example 1 15％×90％＝13.5％ Example 2 17％×90％＝15.3％ Example 3 19％×90％＝17.1％ Example 4 15％×90％＝13.5％ Example 5 13％×90％＝11.7％ Example 6 16％×90％＝14.4％ Example 7 14％×90％＝12.6％ Example 8 16％×90％＝14.4％ Example 9 13％×90％＝11.7％ Example 10 13％×90％＝11.7％

[0076] It was found from Table 3 that using the complexing functional material of the present invention can reduce carbon emissions by 11.7% - 17.1%. Among them, Example 1 demonstrated the carbon reduction effect of the synergistic complexing effect of the calcium-iron complexing component (tetrahydroxyethylenediamine) and the aluminum complexing component (diethylenetriamine pentamethylenephosphonic acid) under the synergistic intervention of the complexing anion regulating component (sodium thiocyanate), the metal cation regulating component (calcium chloride), and the pH regulating component (glycine); Example 2 demonstrated the carbon reduction effect of the synergistic complexing effect of the calcium-iron complexing component (ethylenediaminetetraacetic acid) and the aluminum complexing component (sodium hydroxyethanediphosphonate) under the synergistic intervention of the complexing anion regulating component (sodium thiocyanate), the metal cation regulating component (calcium nitrate), and the pH regulating component (N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid); Example 3 demonstrated the carbon reduction effect of the synergistic complexing effect of the calcium-iron complexing component (diethanolmonoisopropanolamine) and the aluminum complexing component (sodium ethylenediaminetetramethylenephosphonate) under the synergistic intervention of the complexing anion regulating component (sodium thiocyanate), the metal cation regulating component (calcium chloride), and the pH regulating component (glycine); Example 4 demonstrated the carbon reduction effect of the synergistic complexing effect of various calcium-iron complexing components (ethylenediaminetetraacetic acid, diethanolmonoisopropanolamine) and various aluminum complexing components (sodium diethylenetriamine pentamethylenephosphonate, sodium ethylenediaminetetramethylenephosphonate) under the synergistic intervention of the complexing anion regulating component (sodium thiocyanate), the metal cation regulating component (calcium chloride), and the pH regulating component (glycine); Example 5 demonstrated the carbon reduction effect of the synergistic complexing effect of various calcium-iron complexing components (ethylenediaminetetraacetic acid, diethanolmonoisopropanolamine) and various aluminum complexing components (sodium ethylenediaminetetramethylenephosphonate, hydroxyethanediphosphonic acid, and sodium diethylenetriamine pentamethylenephosphonate) under the synergistic intervention of the complexing anion regulating component (potassium thiocyanate), the metal cation regulating component (calcium nitrate), and the pH regulating component (sodium hydroxide); Example 6 demonstrated the carbon reduction effect of the synergistic complexing effect of the calcium-iron complexing component (diethanolmonoisopropanolamine) and the aluminum complexing component (sodium ethylenediaminetetramethylenephosphonate) under the synergistic intervention of various complexing anion regulating components (sodium thiocyanate and potassium thiocyanate) and the pH regulating component (sodium hydroxide); Example 7 demonstrated the carbon reduction effect of the synergistic complexing effect of the calcium-iron complexing component (diethanolmonoisopropanolamine) and the aluminum complexing component (sodium ethylenediaminetetramethylenephosphonate) at a low dosage under the synergistic intervention of the complexing anion regulating component (calcium thiocyanate), the metal cation regulating component (calcium chloride), and the pH regulating component (glycine); Example 8 demonstrated the carbon reduction effect of the synergistic complexing effect of the calcium-iron complexing component (diethanolmonoisopropanolamine) and the aluminum complexing component (sodium hydroxyethanediphosphonate) at a relatively low dosage under the synergistic intervention of various metal cation regulating components (calcium nitrate and sodium chloride) and various pH regulating components (glycine and N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid);Example 9 demonstrated the carbon reduction effect of the synergistic complexation effect of a large dosage of calcium-iron complexing component (diethanolmonoisopropanolamine) and aluminum complexing component (diethylenetriamine pentamethylenephosphonic acid) under the intervention of various pH regulation components (sodium hydroxide, glycine, and N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid); Example 10 demonstrated the carbon reduction effect of the synergistic complexation effect of a large dosage of calcium-iron complexing component (diethanolmonoisopropanolamine) and aluminum complexing component (sodium ethylenediaminetetramethylenephosphonate) under the intervention of various complexing anion regulation components (sodium thiocyanate and calcium thiocyanate).

[0077] In the present invention, diethanolmonoisopropanolamine was used as the calcium-iron complexing component, sodium thiocyanate was used as the complexing anion regulation component, and the complexing effect of the calcium-iron complexing component and the intervention of the complexing anion regulation component on the complexing effect of the calcium-iron complexing component on Fe in the liquid phase were verified with diethanolmonoisopropanolamine as the calcium-iron complexing component. 3+ The specific process was as follows: Weigh 1 g of cement passing through a 200-mesh sieve (by mass percentage, including: 80% clinker, 5% gypsum, 5% slag, and 10% limestone, the same below), and pour it into a beaker containing 1000 mL of ultrapure water that is being stirred as the blank group; Weigh 1 g of cement passing through a 200-mesh sieve and pour it into a beaker containing 1000 mL of diethanolmonoisopropanolamine solution that is being stirred as experimental group one, where the concentration of the diethanolmonoisopropanolamine solution is 0.0004 g / mL; Weigh 1 g of cement passing through a 200-mesh sieve and pour it into a beaker containing 1000 mL of a mixed solution of diethanolmonoisopropanolamine and sodium thiocyanate that is being stirred as experimental group two, where the concentration of diethanolmonoisopropanolamine is 0.0004 g / mL and the concentration of sodium thiocyanate is 0.0018 g / mL. The results are shown in Figure 1 , and it can be seen that on the basis of the calcium-iron complexing component (diethanolmonoisopropanolamine), using the complexing anion regulation component (sodium thiocyanate) to intervene in the complexation can further promote the dissolution of the iron phase.

[0078] In the present invention, diethanolmonoisopropanolamine was used as the calcium-iron complexing component, sodium thiocyanate was used as the complexing anion regulation component, and the complexing effect of the calcium-iron complexing component and the intervention of the complexing anion regulation component on the complexing effect of the calcium-iron complexing component on the thermogravimetric TG-DTG curve of the cement paste specimen were verified with diethanolmonoisopropanolamine as the calcium-iron complexing component. The age of the cement paste specimen was three days. The specific method was as follows: The cement paste without adding any additional admixtures (prepared by mixing cement and water, with a water / cement mass ratio of 0.5) was used as the blank group; 0.015% (by mass fraction, the same below) of diethanolmonoisopropanolamine was added on the basis of the blank group as experimental group one; 0.015% of diethanolmonoisopropanolamine and 0.05% of sodium thiocyanate were added on the basis of the blank group as experimental group two. The results are shown in Figure 2, it can be seen that on the basis of the calcium-iron complexing component (diethanolmonoisopropanolamine), using the complexing anion regulating component (sodium thiocyanate) to intervene in the complexing can further promote the formation of hydration products.

[0079] In the present invention, diethanolmonoisopropanolamine is used as the calcium-iron complexing component, and sodium thiocyanate is used as the complexing anion regulating component. Using diethanolmonoisopropanolamine as the calcium-iron complexing component, the effects of the complexing action of the calcium-iron complexing component and the intervention of the complexing anion regulating component on the strength of cement mortar at each age are verified. The specific method is as follows: The cement mortar without adding any additional admixtures (prepared by mixing water, cement and standard sand, the water / cement mass ratio is 0.5, and the standard sand / cement mass ratio is 3) is used as the blank group; 0.015% (mass fraction, the same below) of diethanolmonoisopropanolamine is added on the basis of the blank group as experimental group one; 0.015% of diethanolmonoisopropanolamine and 0.05% of sodium thiocyanate are added on the basis of the blank group as experimental group two. The results are shown in Figure 3 , it can be seen that on the basis of the calcium-iron complexing component (diethanolmonoisopropanolamine), using the complexing anion regulating component (sodium thiocyanate) to intervene in the complexing can further improve the performance of cement mortar.

[0080] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A complex functional material for reducing cement carbon emissions, characterized in that: The invention is composed of the following components: a calcium-iron complex component, an aluminum complex component, a complex anion regulating component, a metal cation regulating component, a pH regulating component, a hydration regulating component and a solvent.

2. The complex functional material for reducing cement carbon emissions according to claim 1, characterized in that: The cement is composed of the following components in percentage by weight based on the total weight of the cement: 0.010%-0.020% of a calcium-iron complex component, 0.0010%-0.0050% of an aluminum complex component, 0.00%-0.080% of a complex anion regulating component, 0.00%-0.060% of a metal cation regulating component, 0.00%-0.060% of a pH regulating component, 0.00%-0.010% of a hydration regulating component and 0.00%-0.050% of a solvent, wherein the complex anion regulating component, the metal cation regulating component, the pH regulating component, the hydration regulating component and the solvent are not 0.00 at the same time.

3. The complex functional material for reducing cement carbon emission according to claim 2, characterized in that: Based on the total weight of the cement, the cement is composed of the following components in percentage by weight: 0.013%-0.017% calcium-iron complex component, 0.0020%-0.0030% aluminum complex component, 0.020%-0.060% complex anion regulating component, 0.010%-0.040% metal cation regulating component, 0.010%-0.020% pH regulating component, 0.0030%-0.0070% hydration regulating component and 0.010%-0.025% solvent.

4. The complex functional material for reducing cement carbon emission according to claim 3, characterized in that: The calcium-iron complex component is selected from at least one of ethylenediaminetetraacetic acid, tetrahydroxyethylenediamine and diethanol monoisopropanolamine; and / or The complex anion regulating component is selected from at least one of sodium thiocyanate, calcium thiocyanate and potassium thiocyanate; and / or The metal cation regulating component is selected from at least one of sodium chloride, calcium chloride and calcium nitrate; and / or The pH regulating component is selected from at least one of sodium hydroxide, glycine and sodium N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate; and / or The hydration regulating component is selected from at least one of sucrose and hydroquinone.

5. The complex functional material for reducing cement carbon emission according to claim 4, characterized in that: The calcium-iron complex component is selected from at least one of ethylenediaminetetraacetic acid and diethanol monoisopropanolamine; and / or The complex anion regulating component is sodium thiocyanate; The pH regulating component is selected from at least one of glycine and sodium N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate.

6. The complex functional material for reducing cement carbon emission according to claim 4, characterized in that: The hydration regulating component consists of sucrose and hydroquinone in a weight ratio of 1:

1.

7. The complex functional material for reducing cement carbon emission according to claim 3, characterized in that: The aluminum complexing component is a phosphonate complexing agent.

8. The complex functional material for reducing cement carbon emission according to claim 7, characterized in that: The phosphonate complexing agent is selected from at least one of sodium ethylenediaminetetramethylenephosphonate, sodium hydroxyethylidenediphosphonate and sodium diethylenetriaminepenta(methylenephosphonate).

9. The complex functional material for reducing cement carbon emission according to claim 3, characterized in that: The solvent is glycerol.

10. Use of the complex functional material for reducing cement carbon emission according to any one of claims 1 to 9 in reducing cement carbon emission.

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