CN117229012A - Non-alkali excitation type steel slag cementing material and preparation method thereof - Google Patents
Non-alkali excitation type steel slag cementing material and preparation method thereof Download PDFInfo
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- CN117229012A CN117229012A CN202311492343.XA CN202311492343A CN117229012A CN 117229012 A CN117229012 A CN 117229012A CN 202311492343 A CN202311492343 A CN 202311492343A CN 117229012 A CN117229012 A CN 117229012A
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- steel slag
- ethylenediamine
- alkali
- tetraacetic acid
- cementing material
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- 239000002893 slag Substances 0.000 title claims abstract description 121
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 119
- 239000010959 steel Substances 0.000 title claims abstract description 119
- 239000003513 alkali Substances 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 title claims abstract description 25
- 230000005284 excitation Effects 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 claims description 37
- -1 ethylenediamine tetraacetic acid diester Chemical class 0.000 claims description 26
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 21
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical class NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 21
- 229960001484 edetic acid Drugs 0.000 claims description 20
- 239000002131 composite material Substances 0.000 claims description 18
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims description 17
- GMCBSXCBAPZBFF-UHFFFAOYSA-N 2-[2-[bis(2-ethoxy-2-oxoethyl)amino]ethyl-(carboxymethyl)amino]acetic acid Chemical compound CCOC(=O)CN(CC(=O)OCC)CCN(CC(O)=O)CC(O)=O GMCBSXCBAPZBFF-UHFFFAOYSA-N 0.000 claims description 13
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims description 13
- 229940120146 EDTMP Drugs 0.000 claims description 13
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims description 13
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 10
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 238000007873 sieving Methods 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 230000004913 activation Effects 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- ZNNZYHKDIALBAK-UHFFFAOYSA-M potassium thiocyanate Chemical compound [K+].[S-]C#N ZNNZYHKDIALBAK-UHFFFAOYSA-M 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 17
- 230000036571 hydration Effects 0.000 description 12
- 238000006703 hydration reaction Methods 0.000 description 12
- BYACHAOCSIPLCM-UHFFFAOYSA-N 2-[2-[bis(2-hydroxyethyl)amino]ethyl-(2-hydroxyethyl)amino]ethanol Chemical compound OCCN(CCO)CCN(CCO)CCO BYACHAOCSIPLCM-UHFFFAOYSA-N 0.000 description 11
- 229940029036 ethylenediamine tetraethanol Drugs 0.000 description 11
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- CJKRXEBLWJVYJD-UHFFFAOYSA-N N,N'-diethylethylenediamine Chemical compound CCNCCNCC CJKRXEBLWJVYJD-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 125000001664 diethylamino group Chemical class [H]C([H])([H])C([H])([H])N(*)C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- OPGYRRGJRBEUFK-UHFFFAOYSA-L disodium;diacetate Chemical compound [Na+].[Na+].CC([O-])=O.CC([O-])=O OPGYRRGJRBEUFK-UHFFFAOYSA-L 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 125000003916 ethylene diamine group Chemical group 0.000 description 1
- 229940071106 ethylenediaminetetraacetate Drugs 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of steel slag-based cementing materials, in particular to a non-alkali excitation type steel slag cementing material and a preparation method thereof.
Description
Technical Field
The invention relates to the technical field of steel slag-based cementing materials, in particular to a non-alkali excitation type steel slag cementing material and a preparation method thereof.
Background
Steel slag is a solid waste produced in the process of smelting steel, and the amount of steel slag is accumulated year by year along with the annual production of steel.
The recycling utilization rate of the steel slag is less than 40%, and a way for large-scale consumption of the steel slag is not available, so that a large amount of land resource waste and pollution are caused by the unutilized steel slag.
If the steel slag can be used for the cementing material, the utilization of the steel slag can be greatly promoted, the use of cement can be reduced, and the purposes of energy conservation and carbon reduction can be achieved.
The problem of low reactivity of steel slag makes it not fully usable as a good cementing material like cement, but can only be incorporated into cement as a mineral admixture, aggregate, etc.
The current research is also mostly added into cement in the proportion of 30%, which greatly restricts the utilization of steel slag.
In the aspect of strength excitation, alkali excitation is mainly adopted, such as sodium hydroxide, lime, water glass, carbide slag and the like, but the cost is high, the workability is not easy to control, the alkalinity of the prepared cementing material is high, the alkalinity of the prepared building material product is high, the quality problems of alkali return, white flowers and the like are easy to generate, in addition, the steel slag contains partial free calcium oxide, so that the hidden trouble of insufficient stability of the steel slag is caused, and the large-scale use of the steel slag is limited.
Aiming at the problems of active excitation and limited strength improvement of the steel slag, the invention provides a method for preparing a high-strength cementing material by using the steel slag in a non-alkali excitation and 100 percent, which has positive promotion effect on improving the application of the converter steel slag in the field of building materials.
Disclosure of Invention
In order to solve the problem that the activity of steel slag in the prior art depends on alkali excitation and the strength is improved to a limited extent, the invention provides a non-alkali excitation type steel slag cementing material and a preparation method thereof.
Specifically, the preparation method of the non-alkali excitation type steel slag cementing material comprises the following steps:
1) Grinding the steel slag and ethylenediamine derivative solution together, and sieving to obtain steel slag activated powder;
2) Mixing the steel slag activation powder with the composite solution of ethylenediamine tetraacetic acid, ethylenediamine tetraacetic acid diester, alcohol amine and inorganic salt to obtain the steel slag activation powder;
wherein the ethylenediamine derivative is a mixture of disodium ethylenediamine tetraacetate and ethylenediamine tetramethylene phosphonic acid;
the inorganic salt is CaCl 2 At least one of KSCN.
The main minerals in the steel slag comprise C 3 S、C 2 S、C 2 F and RO phases, wherein predominantly C provides gelling activity 3 S and C 2 S, firstly, ethylenediamine tetramethylene phosphonic acid and disodium ethylenediamine tetraacetate are added during grinding of steel slag, the steel slag structure is integrally acidized and complexed, the dissolution performance of various minerals in the steel slag is improved, the ethylenediamine tetramethylene phosphonic acid has more acidification effect on the steel slag, the disodium ethylenediamine tetraacetate is more complexed with metal ions in the steel slag, the dissolution balance of the disodium ethylenediamine tetraacetate in the solution is promoted to move rightwards, and the research shows that the combination of the ethylenediamine tetramethylene phosphonic acid and the disodium ethylenediamine tetraacetate can fully expose hydration sites of free calcium oxide, improve the self-excitation capability of the free calcium oxide, accelerate the hydration of the free calcium oxide, reduce the calcium oxide content after hardening of slurry and cooperatively achieve the purposes of improving the activity of the steel slag and promoting the dissolution of mineral phases.
Preferably, the steel slag of step 1) is converter steel slag.
Preferably, the effective content of the ethylenediamine derivative in the step 1) is 0.01-0.05% of the mass of the steel slag.
Preferably, the mass ratio of the disodium ethylenediamine tetraacetate to the ethylenediamine tetramethylene phosphonic acid in the step 1) is 1:0.5-2.
Preferably, the grain size of the steel slag activating powder in the step 1) is less than 75 mu m.
Preferably, the ethylene diamine tetraacetic acid diester of step 2) is diethyl ethylene diamine tetraacetate.
Preferably, the alcohol amine in the step 2) is at least one of triethanolamine, triisopropanolamine and diethanol monoisopropanolamine.
More preferably, the alcohol amine of step 2) is diethanol monoisopropanolamine, free ofThe machine salt is CaCl 2 。
Preferably, the total effective content of the ethylenediamine tetraacetic acid, the ethylenediamine tetraacetic acid diester, the alcohol amine and the inorganic salt in the step 2) is 0.01-0.1% of the mass of the steel slag active powder, and the mass ratio of the ethylenediamine tetraacetic acid diester to the alcohol amine to the inorganic salt is 1:0.5-2:0.5-2:0.5-2.
In addition, the invention adds the ethylenediamine tetraacetic acid diester, alcohol amine and inorganic salt compound solution during the hydration of the steel slag, so that the hydration balance of the steel slag can be controlled, the hydration rate of the steel slag can be accelerated, and the hydration degree can be increased.
The added alcohol amine can play a certain role in promoting the overall hydration, including early-stage and later-stage hydration, but the effect is not strong, on the basis, the early strength effect is supplemented by adding inorganic salts, the later strength effect is supplemented by adding ethylenediamine tetraacetic acid diester, and the problem of compatibility among various excitants can be solved by adding ethylenediamine tetraacetic acid; in addition, the invention adds ethylenediamine tetraacetic acid diester and alcohol amine to cooperate with each other, thus promoting the generation of gel hydration products in steel slag, and simultaneously, inorganic salts can supplement more metal ions to participate in forming hydration products besides the effect of supplementing early strength, and diethylamine derivatives attached to steel slag activated powder can enhance the excitation effect of alcohol amine and ethylenediamine tetraacetic acid diester, assist ethylenediamine tetraacetic acid to promote the compatibility of all raw materials, and improve the digestion degree of free calcium oxide and the uniform hydration of steel slag minerals.
In combination, the invention further combines the composite solution to increase the hydration of the steel slag on the basis of increasing the dissolution of the steel slag by pretreatment, thereby achieving the purpose of increasing the strength of the steel slag.
While various existing ways of exciting the strength of the waste residue have certain effect on strength improvement, the following defects are caused: poor volume stability and large shrinkage; alkali excitation is adopted, so that the risk of alkali-aggregate reaction is high; the problems of alkali precipitation and alkali efflorescence are prominent in the use process; the cost of the exciting agent is high.
The invention also relates to a non-alkali excitation type steel slag cementing material, and in particular relates to the non-alkali excitation type steel slag cementing material prepared by the preparation method.
According to the method for preparing the high-strength cementing material by using the steel slag through non-alkali excitation and 100%, the strength improving effect can be improved, the 3d mechanical strength of the pure steel slag slurry can be improved by 3.1-4.3 MPa, the 7d mechanical strength can be improved by 3.5-4.6 MPa, and the 28d mechanical strength can be improved by 5.0-6.3 MPa.
Detailed Description
In order to characterize the technical effect of the invention, the steel slag cementing material is prepared and used as 100% cementing material to prepare clean slurry and mortar, 75 mu m steel slag powder is used as a blank, the stability of the cementing material is tested by using the clean slurry through a Rasche's clamp method, and the mechanical properties of the mortar are detected according to GBT17671-2021 cement mortar strength test method (ISO method).
Wherein, the chemical composition of the steel slag is shown in table 1.
TABLE 1 chemical composition of steel slag (%)
Example 1
Grinding together the steel slag and ethylenediamine derivative solution with the effective mass of 0.01% of the steel slag, and sieving with a 75 μm sieve to obtain steel slag activated powder; the effective mass of the steel slag activated powder and the activated steel slag powder is 0.02 percent of ethylenediamine tetraethanol, ethylenediamine tetraacetic acid diethyl ester, diethanol monoisopropanolamine and CaCl 2 Mixing the composite solution to obtain the composite solution; wherein the ethylenediamine derivative is a mixture of disodium ethylenediamine tetraacetate and ethylenediamine tetramethylene phosphonic acid according to a mass ratio of 1:1, and comprises ethylenediamine tetraacetic acid, ethylenediamine tetraacetic acid diethyl ester, diethanol monoisopropanolamine and CaCl 2 The mass ratio is 1:1:1:1.
Example 2
Grinding together the steel slag and ethylenediamine derivative solution with the effective mass of 0.03% of the steel slag, and sieving with a 75 μm sieve to obtain steel slag activated powder; the effective mass of the steel slag activated powder and the activated steel slag powder is 0.06 percent of ethylenediamine tetraethanol, ethylenediamine tetraacetic acid diethyl ester, diethanol monoisopropanolamine and CaCl 2 Mixing the composite solution to obtain the composite solution; wherein the ethylenediamine derivative is ethylenediamine tetra (ethylenediamine tetra)Mixture of disodium acetate and ethylenediamine tetramethylene phosphonic acid according to mass ratio of 1:0.5, ethylenediamine tetraethanol, ethylenediamine tetraacetic acid diethyl ester, diethanol monoisopropanolamine and CaCl 2 The mass ratio is 1:2:1:1.
Example 3
Grinding together the steel slag and ethylenediamine derivative solution with the effective mass of 0.05% of the steel slag, and sieving with a 75 μm sieve to obtain steel slag activated powder; the effective mass of the steel slag activated powder and the activated steel slag powder is 0.1 percent of ethylenediamine tetraethanol, ethylenediamine tetraacetic acid diethyl ester, diethanol monoisopropanolamine and CaCl 2 Mixing the composite solution to obtain the composite solution; wherein the ethylenediamine derivative is a mixture of disodium ethylenediamine tetraacetate and ethylenediamine tetramethylene phosphonic acid according to a mass ratio of 1:2, and comprises ethylenediamine tetraacetic acid, ethylenediamine tetraacetic acid diethyl ester, diethanol monoisopropanolamine and CaCl 2 The mass ratio is 1:0.5:0.5:1.
Comparative example 1
Grinding together the steel slag and ethylenediamine derivative solution with the effective mass of 0.05% of the steel slag, and sieving with a 75 μm sieve to obtain steel slag activated powder; the effective mass of the steel slag activated powder and the activated steel slag powder is 0.1 percent of ethylenediamine tetraethanol, ethylenediamine tetraacetic acid diethyl ester, diethanol monoisopropanolamine and CaCl 2 Mixing the composite solution to obtain the composite solution; wherein the ethylenediamine derivative is disodium ethylenediamine tetraacetate, ethylenediamine tetraacetic acid diethyl ester, diethanol monoisopropanolamine and CaCl 2 The mass ratio is 1:0.5:0.5:1.
Comparative example 2
Grinding together the steel slag and ethylenediamine derivative solution with the effective mass of 0.05% of the steel slag, and sieving with a 75 μm sieve to obtain steel slag activated powder; the effective mass of the steel slag activated powder and the activated steel slag powder is 0.1 percent of ethylenediamine tetraethanol, ethylenediamine tetraacetic acid diethyl ester, diethanol monoisopropanolamine and CaCl 2 Mixing the composite solution to obtain the composite solution; wherein the ethylenediamine derivative is ethylenediamine tetramethylene phosphonic acid, ethylenediamine tetraethanol, ethylenediamine tetraacetic acid diethyl ester, diethanol monoisopropanolamine, caCl 2 The mass ratio is 1:0.5:0.5:1.
Comparative example 3
The steel slag and the triethanolamine with the effective mass of 0.05 percent of the steel slag are processedGrinding the amine solution together, and sieving with a 75 μm sieve to obtain steel slag activated powder; the effective mass of the steel slag activated powder and the activated steel slag powder is 0.1 percent of ethylenediamine tetraethanol, di-monoisopropanolamine and CaCl 2 Mixing the composite solution to obtain the composite solution; wherein the ethylene diamine tetraethanol, the diethanol monoisopropanolamine and CaCl 2 The mass ratio is 1:0.5:1.
Comparative example 4
Grinding together the steel slag and ethylenediamine derivative solution with the effective mass of 0.05% of the steel slag, and sieving with a 75 μm sieve to obtain steel slag activated powder; the effective mass of the steel slag activated powder and the activated steel slag powder is 0.1 percent of the ethylene diamine tetraacetic acid diethyl ester and CaCl 2 Mixing the composite solution to obtain the composite solution; wherein the ethylenediamine derivative is a mixture of disodium ethylenediamine tetraacetate and ethylenediamine tetramethylene phosphonic acid according to a mass ratio of 1:2, and comprises ethylenediamine tetraacetic acid diethyl ester and CaCl 2 The mass ratio is 1:2.
Comparative example 5
Grinding together the steel slag and ethylenediamine derivative solution with the effective mass of 0.05% of the steel slag, and sieving with a 75 μm sieve to obtain steel slag activated powder; mixing the steel slag activated powder with an ethylenediamine tetraethanol and diethanol monoisopropanolamine composite solution with the effective mass of 0.1% of the activated steel slag powder to obtain the steel slag activated powder; the ethylenediamine derivative is a mixture of disodium ethylenediamine tetraacetate and ethylenediamine tetramethylene phosphonic acid according to a mass ratio of 1:2, and the mass ratio of ethylenediamine tetraethanol to diethanol monoisopropanolamine is 1:0.5.
The results are shown in Table 2.
Table 2 results of detection of slag cement
The preparation method of the non-alkali excitation type steel slag cementing material has obvious effect of improving the strength of steel slag, the highest 3d and 7d lifting effects of 4.3MPa and 4.6Ma and 28d lifting effects of 6.3Ma are also good, and the method shows good application effect.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limited thereto; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features can be replaced with equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The preparation method of the non-alkali excitation type steel slag cementing material is characterized by comprising the following steps of:
1) Grinding the steel slag and ethylenediamine derivative solution together, and sieving to obtain steel slag activated powder;
2) Mixing the steel slag activation powder with the composite solution of ethylenediamine tetraacetic acid, ethylenediamine tetraacetic acid diester, alcohol amine and inorganic salt to obtain the steel slag activation powder;
wherein the ethylenediamine derivative is a mixture of disodium ethylenediamine tetraacetate and ethylenediamine tetramethylene phosphonic acid;
the inorganic salt is CaCl 2 At least one of KSCN.
2. The method for producing non-alkali activated steel slag cement according to claim 1, wherein the steel slag in step 1) is converter steel slag.
3. The method for preparing non-alkali excited steel slag cementing material according to claim 1, wherein the effective content of ethylenediamine derivative in the step 1) is 0.01-0.05% of the mass of steel slag.
4. The preparation method of the non-alkali excitation type steel slag cementing material according to claim 1, wherein the mass ratio of the disodium ethylenediamine tetraacetate to the ethylenediamine tetramethylene phosphonic acid in the step 1) is 1:0.5-2.
5. The method for preparing non-alkali excited steel slag cementing material according to claim 1, wherein the grain size of the steel slag activating powder in the step 1) is less than 75 μm.
6. The method for preparing non-alkali activated slag cement according to claim 1, wherein the ethylene diamine tetraacetic acid diester in step 2) is ethylene diamine tetraacetic acid diethyl ester.
7. The method for preparing non-alkali activated steel slag cement according to claim 1, wherein the alcohol amine in the step 2) is at least one of triethanolamine, triisopropanolamine and diethanol monoisopropanolamine.
8. The method for preparing non-alkali excited steel slag cementing material according to claim 7, wherein in the step 2), the alcohol amine is diethanol monoisopropanolamine, and the inorganic salt is CaCl 2 。
9. The preparation method of the non-alkali excitation type steel slag cementing material according to claim 1, wherein the total effective content of the ethylenediamine tetraacetic acid, the ethylenediamine tetraacetic acid diester, the alcohol amine and the inorganic salt in the step 2) is 0.01-0.1% of the mass of the steel slag active powder, and the mass ratio of the ethylenediamine tetraacetic acid diester, the alcohol amine and the inorganic salt is 1:0.5-2:0.5-2:0.5-2.
10. A non-alkali activated slag cement, characterized in that it is prepared by the preparation method according to any one of claims 1 to 9.
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