CN113185174A - Steel slag activity excitant, active steel slag powder and application thereof - Google Patents
Steel slag activity excitant, active steel slag powder and application thereof Download PDFInfo
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- CN113185174A CN113185174A CN202110393416.4A CN202110393416A CN113185174A CN 113185174 A CN113185174 A CN 113185174A CN 202110393416 A CN202110393416 A CN 202110393416A CN 113185174 A CN113185174 A CN 113185174A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 149
- 239000010959 steel Substances 0.000 title claims abstract description 149
- 239000002893 slag Substances 0.000 title claims abstract description 147
- 230000000694 effects Effects 0.000 title claims abstract description 44
- 239000000843 powder Substances 0.000 title claims abstract description 44
- 239000010802 sludge Substances 0.000 claims abstract description 26
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 238000000227 grinding Methods 0.000 claims abstract description 14
- 239000003054 catalyst Substances 0.000 claims abstract description 12
- 229910052747 lanthanoid Inorganic materials 0.000 claims abstract description 12
- 150000002602 lanthanoids Chemical class 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 9
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 229910000027 potassium carbonate Inorganic materials 0.000 claims abstract description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 6
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 4
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims abstract description 4
- 150000008041 alkali metal carbonates Chemical class 0.000 claims abstract description 4
- -1 alkali metal chlorate Chemical class 0.000 claims abstract description 4
- XTEGARKTQYYJKE-UHFFFAOYSA-M chlorate Inorganic materials [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 239000012190 activator Substances 0.000 claims description 5
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical group [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 claims description 5
- VQEHIYWBGOJJDM-UHFFFAOYSA-H lanthanum(3+);trisulfate Chemical compound [La+3].[La+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O VQEHIYWBGOJJDM-UHFFFAOYSA-H 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 11
- 239000005995 Aluminium silicate Substances 0.000 abstract description 7
- 235000012211 aluminium silicate Nutrition 0.000 abstract description 7
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 abstract description 7
- 229910021578 Iron(III) chloride Inorganic materials 0.000 abstract description 6
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 230000005284 excitation Effects 0.000 description 15
- 239000000126 substance Substances 0.000 description 12
- 239000013543 active substance Substances 0.000 description 6
- 230000036571 hydration Effects 0.000 description 6
- 238000006703 hydration reaction Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000000197 pyrolysis Methods 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000003334 potential effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 210000004127 vitreous body Anatomy 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a steel slag activity excitant, active steel slag powder and application thereof. The steel slag activity excitant comprises kaolin, diatomite, dried sludge, alkali metal carbonate, alkali metal chlorate, N-acyl sodium carbamate and FeCl3And a lanthanide catalyst; the alkali metal carbonate is Na2CO3Or K2CO3(ii) a The alkali metal chlorate is KClO3Or NaClO3(ii) a Mixing the components uniformly, and grinding to 200-400 m2And/kg, obtaining the steel slag activity excitant. Spraying a steel slag active excitant into the fluid steel slag discharged from the boiler, uniformly mixing, cooling, and grinding to obtain active steel slag powder. The excitant of the invention can improve the grindability of the steel slag, greatly improve the activity of the steel slag, realize the resource utilization of the sludge and reduce the environmental pollution.
Description
Technical Field
The invention relates to the field of building materials, in particular to a steel slag active exciting agent, active steel slag powder and application thereof.
Background
The steel slag is solid waste generated in the steel making process, the production capacity of the steel slag reaches 8% -15% of the steel yield, and particularly, the production capacity of the steel slag is rapidly increased along with the continuous development of the steel industry at present. Therefore, the problem of treatment and resource utilization of steel slag is also more and more emphasized. However, the current situation of the actual comprehensive utilization of steel slag in China is not optimistic, and particularly, the utilization rate of the steel slag of the converter is only 10-20%. The steel slag produced by domestic iron and steel enterprises can not be treated in time, so that a large amount of steel slag occupies land and pollutes the environment. However, the steel slag is not an unusable solid waste, contains a large amount of available components such as slag steel, calcium oxide, iron and magnesium oxide, and has potential activity. The steel slag is recycled from the 80 th of the last century in China, and can be used as a sintering ore raw material, a roadbed, a backfill material, a water machine raw material and the like after exploration, wherein the production of cement by using the steel slag is one of the most important ways for the comprehensive utilization of the steel slag, and because the consumption of the cement is high, if the large amount and high-efficiency utilization of the steel slag in the cement can be realized, the environmental problem caused by the steel slag is necessarily greatly relieved. However, the current research shows that the steel slag has the problems of low activity, slow hydration and the like, and the strength of the cement is rapidly reduced and the volume stability is deteriorated along with the increase of the mixing amount of the steel slag in the cement, so that the further use of the steel slag is limited. In order to further realize the large-scale application of the steel slag, the activity of the steel slag needs to be stimulated to improve the existing problems.
At present, the excitation mode of the activity of the steel slag mainly comprises mechanical excitation, chemical excitation and thermal excitation. The mechanical excitation is mainly characterized in that dislocation and defects of steel slag mineral lattices occur through mechanical destruction modes such as crushing, friction and the like, steel slag particles are promoted to generate free radicals or ions, and the surface activity of steel slag powder is enhanced to achieve the purpose of surface modification. The chemical excitation mainly utilizes various corrosive substances such as acid, alkali, salt and the like to realize the excitation of the activity of the steel slag. The acid excitation is mainly to promote the balance to move towards the dissolving-out direction of alkaline substances and promote the generation of hydration products by neutralizing the alkalinity in the steel slag through acidic substances; the alkali excitation is mainly to increase the pH value and promote the alkaline substances to diffuse into the steel slag and decompose the original integral structure, so that the high-activity substances enter the solution and the hydrolysis of the steel slag vitreous body is accelerated; the sulfate excitation is mainly used for accelerating the generation rate of a steel slag hydration product, namely ettringite, and improving the hydration process of the steel slag hydration product. The thermal excitation is mainly to crack silicon-oxygen bonds forming a network structure of the steel slag after the steel slag is autoclaved at high temperature, so that the disintegration is accelerated, and the hydration is promoted.
On the whole, the excitation means of the steel slag can achieve the purpose of exciting the activity of the steel slag, but the activity of the steel slag is improved to a limited extent due to the low activity and low content of potential active substances of the steel slag, and the steel slag is not fully activated compared with the material components of the steel slag. Therefore, to fully activate the activity of the steel slag, the content of potential active substances of the steel slag needs to be increased, and the existing treatment process of the steel slag cannot meet the requirement. Therefore, the invention provides a new technical means for exciting the activity of the steel slag from the process flow of the steel slag treatment according to the existing production and technical conditions.
Disclosure of Invention
In order to overcome the problems of low content of potential active substances of the steel slag, low activity, low utilization rate and the like, the invention aims to provide a steel slag activity excitant and a use method thereof.
In order to achieve the aim, the invention provides a steel slag activity excitant, which comprises the following components in parts by mass:
the alkali metal carbonate is Na2CO3Or K2CO3；
The alkali metal chlorate is KClO3Or NaClO3；
Mixing the components uniformly, and grinding to 200-400 m2And/kg, obtaining the steel slag activity excitant.
The lanthanide catalyst is selected from one or two of lanthanum nitrate and lanthanum sulfate which are mixed in any proportion.
The dried sludge is sludge powder or particles with the water content not higher than 5% obtained after the sludge is dried.
The invention provides active steel slag powder, which is prepared by mixing the steel slag active excitant with steel slag, wherein the steel slag is fluid steel slag which is discharged from a boiler and is not quenched; the steel slag active excitant accounts for 8 to 12 percent of the total weight of the steel slag.
The preparation method of the active steel slag powder comprises the following steps: spraying an active excitant occupying the steel slag into the fluid steel slag discharged from the boiler, uniformly mixing, cooling, and grinding to obtain the active steel slag powder.
The specific surface area of the ground active steel slag powder is 400-550m2/kg。
The invention also provides an application method of the active steel slag powder, the active steel slag powder is used as a cement admixture and is ground together with cement clinker when in use, and the using amount of the active steel slag powder is less than 30 percent of the total mass of the cement.
The invention has the beneficial effects that:
the exciting agent is added into the fluidized steel slag taken out of the boiler, the high-temperature condition of the fluidized steel slag can be utilized, the quick reaction of the exciting agent and the steel slag is promoted, the activity of the steel slag is greatly improved, the obtained active steel slag powder meets the performance requirement of the cement admixture, the resource utilization mode of large-scale, high utilization rate and high added value of the steel slag is realized, and the resource waste is avoided.
Wherein, the kaolin can realize crystal form change under the activation condition, and the activity of the kaolin is improved and simultaneously the change is realizedThe calcium-silicon ratio of the steel slag improves the activity of the steel slag. The diatomite can realize self carbon consumption at high temperature, promote the generation of active silicon dioxide, and react with Na2CO3Or K2CO3Under the synergistic reaction effect, the system alkalinity is increased and improved, and the generation of active substances and the excitation of the activity of the steel slag are promoted. The pyrolysis of the sludge powder can increase the porosity of the steel slag and promote the carbon consumption, and under the action of N-acyl sodium acetal, the porosity of the steel slag is further improved, the density of the steel slag is reduced, and the grindability of the steel slag is improved; the sludge after pyrolysis can provide a large amount of silicon-aluminum active substances for the steel slag to promote activity excitation; the addition of the sludge powder not only improves the activity and the grindability of the steel slag, but also realizes the resource utilization of the sludge waste. KClO3Or FeCl3And the synergistic effect of the lanthanide catalyst can effectively improve the pyrolysis degree of the sludge and the carbon consumption of the diatomite, and play a role in catalyzing an activator and promoting the generation of active substances.
The synergistic effect of the components in the steel slag active exciting agent can ensure that the active steel slag powder of the steel slag after the exciting agent is added can realize the following effects: 1) the activation of the activity between each component and the steel slag increases the porosity of the steel slag, improves the grindability of the steel slag and greatly improves the activity of the steel slag; 2) realizes the resource utilization of the sludge and reduces the environmental pollution.
Detailed Description
In order to better understand the present invention, the following embodiments are further described, but it should not be understood that the present invention is only applicable to the following examples, and those skilled in the art can make some insubstantial changes and modifications to the present invention based on the above disclosure, and still fall within the scope of the present invention.
Comparative example 1
The steel slag is not subjected to activity excitation and is ground to the particle size of 400m2/kg。
Example 1
The steel slag activity excitant is prepared by uniformly mixing the following substances in parts by mass: 15 parts of kaolin, 30 parts of diatomite, 10 parts of dried sludge and 15 parts of Na2CO33 parts of KClO30.5 part of N-acyl sodium semicarbazide and 1 part of FeCl31 part of a lanthanide catalyst;
mixing the above components uniformly, grinding to obtain powder with specific surface area of 200m2Per kg, obtaining the steel slag activity excitant;
the lanthanide catalyst is lanthanum nitrate;
the dried sludge is dried sludge particles with the water content of 5 percent.
Spraying 8% of exciting agent into the fluid steel slag discharged from the boiler, uniformly mixing, cooling, and grinding to obtain active steel slag powder; the specific surface area of the ground active steel slag powder is 400m2/kg。
Example 2
The steel slag activity excitant is prepared by uniformly mixing the following substances in parts by mass: 25 parts of kaolin, 20 parts of diatomite, 20 parts of dried sludge and 10 parts of K2CO37 parts of NaClO30.1 part of N-acyl sodium semicarbazide and 2 parts of FeCl30.2 part of a lanthanide catalyst;
mixing the components uniformly, grinding to obtain powder with specific surface area of 400m2Per kg, obtaining the steel slag activity excitant;
the lanthanide series catalyst is lanthanum sulfate;
the dried sludge is absolutely dry sludge particles with the water content of 0 percent.
Spraying 10% of exciting agent into the fluid steel slag discharged from the boiler, uniformly mixing, cooling, and grinding to obtain active steel slag powder; the specific surface area of the ground active steel slag powder is 440m2/kg。
Example 3
The steel slag activity excitant is prepared by uniformly mixing the following substances in parts by mass: 20 parts of kaolin, 25 parts of diatomite, 15 parts of dried sludge and 12 parts of Na2CO35 parts of KClO30.3 part of N-acyl sodium semicarbazide and 1.5 parts of FeCl30.6 part of a lanthanide catalyst;
mixing the above components uniformly, grinding to obtain powder with specific surface area of 325m2Kg, to obtain steelA slag activity excitant;
the lanthanide catalyst is prepared by mixing lanthanum nitrate and lanthanum sulfate in a mass ratio of 1: 1;
the dried sludge is dried sludge powder with the water content of 0.4 percent.
Spraying 12% of exciting agent into the fluid steel slag discharged from the boiler, uniformly mixing, cooling, and grinding to obtain active steel slag powder; the specific surface area of the ground active steel slag powder is 550m2/kg。
Example 4
The steel slag activity excitant is prepared by uniformly mixing the following substances in parts by mass: 25 parts of kaolin, 25 parts of diatomite, 15 parts of dried sludge and 15 parts of K2CO34 parts of KClO30.3 part of N-acyl sodium semicarbazide and 1.5 parts of FeCl30.5 part of a lanthanide catalyst;
mixing the components uniformly, grinding to obtain powder with a specific surface area of 368m2Per kg, obtaining the steel slag activity excitant;
the lanthanide catalyst is prepared by mixing lanthanum nitrate and lanthanum sulfate in a mass ratio of 1: 2;
the sludge powder is dried sludge powder with the water content of 2.3 percent.
Spraying 10% of exciting agent into the fluid steel slag discharged from the boiler, uniformly mixing, cooling, and grinding to obtain active steel slag powder; the specific surface area of the ground active steel slag powder is 487m2/kg。
Performance testing
The steel slag activity in each example and the comparative example is compared according to the method of the cement mortar 28d compressive strength ratio test in GB/T12957-2005, the doping amount of the active steel slag powder is specified in the standard GB/T12957-2005, and the active steel slag powder and the dihydrate gypsum are mixed according to the mass ratio of 90: 10, mixing uniformly, wherein the total mixing amount is 30 percent of the mass of the cement.
The experiment adopts landscape 42.5 ordinary portland cement, the production area: shandong cement works. The chemical composition is shown in Table 1.
TABLE 1 main chemical composition/% of P.O42.5 cement
| Composition of | SiO2 | Al2O3 | Fe2O3 | Ca0 | MgO | Na2O | K2O | SO3 |
| W％ | 20.87 | 6.7 | 3.86 | 58.32 | 4.23 | 0.07 | 0.61 | 2.42 |
The compressive strength and PAI values for each set of samples 28d were tested as specified in relation to GB/T12957-2005 and are shown in Table 2:
TABLE 2 reactive PAI values of the steel slags of the different examples
As can be seen from Table 2, compared with comparative example 1, the strength of the cement mortar doped with activated steel slag powder is greatly improved, and the activity of the steel slag is greatly improved as can be seen from the PAI value, which indicates that the activator can effectively improve the activity of the steel slag.
Claims (6)
1. The steel slag active exciting agent is characterized by comprising the following components in parts by mass:
the alkali metal carbonate is Na2CO3Or K2CO3；
The alkali metal chlorate is KClO3Or NaClO3；
Mixing the components uniformly, and grinding to 200-400 m2And/kg, obtaining the steel slag activity excitant.
2. The steel slag activator according to claim 1, wherein the lanthanide catalyst is selected from lanthanum nitrate and lanthanum sulfate, or a mixture of the two in any ratio.
3. The steel slag activation excitant according to claim 1, wherein the dried sludge is sludge powder or particles with a water content of not more than 5% obtained after drying treatment of sludge.
4. An activated steel slag powder comprising the steel slag activator according to any one of claims 1 to 3, wherein the steel slag activator is mixed with steel slag, and the steel slag is a boiler discharge non-quenched fluid steel slag; the steel slag active excitant accounts for 8 to 12 percent of the total weight of the steel slag.
5. The method for preparing the active steel slag powder according to claim 4, which comprises the following steps: spraying a steel slag active excitant into the fluid steel slag discharged from the boiler, uniformly mixing, cooling, and grinding to obtain active steel slag powder;
the specific surface area of the ground active steel slag powder is 400-550m2/kg。
6. The method for using the active steel slag powder as claimed in claim 4, wherein the active steel slag powder is used as a cement admixture and ground together with cement clinker, and the amount of the active steel slag powder is less than 30% of the total mass of the cement.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953076A (en) * | 2021-09-03 | 2022-01-21 | 福建省建筑科学研究院有限责任公司 | Method for improving grinding efficiency and activity of nickel alloy refining slag of AOD furnace |
| CN114031365A (en) * | 2021-11-30 | 2022-02-11 | 大连理工大学 | Method for improving stability of steel slag and regulating and controlling performance of steel slag building material product based on acid-base excitation |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1108109A1 (en) * | 1983-04-22 | 1984-08-15 | Центральный научно-исследовательский институт материалов и технологии тяжелого и транспортного машиностроения | Method of melting vanadium-containing steels |
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| CN113953076A (en) * | 2021-09-03 | 2022-01-21 | 福建省建筑科学研究院有限责任公司 | Method for improving grinding efficiency and activity of nickel alloy refining slag of AOD furnace |
| CN113953076B (en) * | 2021-09-03 | 2022-10-28 | 福建省建筑科学研究院有限责任公司 | Method for improving grinding efficiency and activity of nickel alloy refining slag of AOD furnace |
| CN114031365A (en) * | 2021-11-30 | 2022-02-11 | 大连理工大学 | Method for improving stability of steel slag and regulating and controlling performance of steel slag building material product based on acid-base excitation |
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