CN111995265A - Early-strength powder slag grinding aid and preparation method thereof - Google Patents
Early-strength powder slag grinding aid and preparation method thereof Download PDFInfo
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- 238000000227 grinding Methods 0.000 title claims abstract description 58
- 239000002893 slag Substances 0.000 title claims abstract description 53
- 239000000843 powder Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 33
- 230000023556 desulfurization Effects 0.000 claims abstract description 33
- 239000002956 ash Substances 0.000 claims abstract description 32
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 26
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000010881 fly ash Substances 0.000 claims abstract description 26
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000010440 gypsum Substances 0.000 claims abstract description 18
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000011259 mixed solution Substances 0.000 claims abstract description 13
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000001291 vacuum drying Methods 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000005303 weighing Methods 0.000 claims abstract description 6
- 239000011258 core-shell material Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 239000002910 solid waste Substances 0.000 claims description 6
- 239000004567 concrete Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 2
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 2
- 150000004683 dihydrates Chemical group 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 2
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 6
- 239000011707 mineral Substances 0.000 abstract description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000005329 float glass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910003480 inorganic solid Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- 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
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides an early strength powder slag grinding aid and a preparation method thereof, wherein the grinding aid is prepared from the following raw materials in parts by weight: 40-60 parts of desulfurization and denitrification ash, 3-8 parts of triethanolamine, 1-5 parts of triisopropanolamine, 15-25 parts of fly ash and 3-10 parts of gypsum. Weighing all raw materials according to the formula, adding organic reagents such as triethanolamine, triisopropanolamine and the like into quantitative absolute ethyl alcohol, and placing the mixture on a magnetic stirrer to stir for 10-30min at 700r/min to enable the mixture to be dissolved uniformly; b. adding powder materials such as desulfurized and denitrified ash, gypsum, fly ash and the like, and continuously stirring for 5-10 min to prepare a mixed solution; c. and (3) putting the mixed solution into a vacuum drying instrument for drying for 3-6h to obtain the early-strength powder slag grinding aid with the core-shell structure. The invention improves the grindability of the mineral powder and the activity index of the slag micro powder; the output of the mill is improved, and the power consumption is saved.
Description
Technical Field
The invention belongs to the field of blast furnace slag micro powder manufacturing, and particularly relates to an early-strength powder slag grinding aid and a preparation method thereof.
Background
The granulated blast furnace slag is waste slag produced in pig iron smelting in iron and steel works, and can fully exert the hydration reaction activity when the granulated blast furnace slag is ground to the specific surface area of over 400m2/kg, and the granulated blast furnace slag can be widely used as an admixture for cement concrete products. The slag is easy to grind and poor in grindability, and grinding aids are generally added in the actual production process to increase the specific surface area of ground slag, so that the aim of reducing energy consumption is fulfilled.
The content of sulfur oxides and nitrogen oxides in the flue gas discharged in the float glass generating process is high, and the flue gas can be discharged only by desulfurization and denitrification treatment. The spray drying method is a common flue gas desulfurization and denitration treatment technology, and can effectively reduce harmful components such as sulfur oxide, nitrogen oxide and the like in the flue gas. The desulfurization and denitrification process can produce byproduct desulfurization and denitrification ash, the granular powder mainly contains anhydrous sodium sulfate (shown in attached figures 1-2) and heavy metal elements such as lead and chromium, and the method mainly takes stockpiling as a main part at present if the heavy metal elements cause great harm to the environment due to improper disposal.
The main component of the desulfurization and denitrification ash is anhydrous sodium sulfate, the reaction activity of slag micro powder can be excited, and the desulfurization and denitrification ash is a potential additive product raw material for cement concrete. According to the invention, by combining the requirements of slag grinding aids, desulfurization and denitrification ash is taken as a main matrix, organic grinding aids such as triethanolamine, triisopropanolamine and the like are compounded, a novel organic-inorganic composite slag grinding aid preparation technology is developed, the grinding aid effect of the organic reagents and the activity excitation function of inorganic solid wastes are fully utilized, and a novel early-strength slag grinding aid preparation technology and an application method based on core-shell structure assembly design are developed.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to research a method for preparing an early strength type powder slag grinding aid by using desulfurization and denitrification ash with a large mixing amount, so that the grindability of mineral powder is improved, and the activity index of slag micropowder is improved; the output of the mill is improved, and the power consumption in unit time is saved.
The technical scheme adopted for solving the problems in the prior art is as follows:
the early-strength powder slag grinding aid is characterized by being prepared from the following raw materials in parts by weight: 40-60 parts of desulfurization and denitrification ash, 3-8 parts of triethanolamine, 1-5 parts of triisopropanolamine, 15-25 parts of fly ash and 3-10 parts of gypsum.
The desulfurization and denitrification ash is solid waste after desulfurization and denitrification treatment of flue gas, and comprises the following chemical components in percentage by weight: 40 to 50 percent of sodium oxide, 45 to 52 percent of sulfur trioxide, 0.1 to 0.4 percent of magnesium oxide, 0.3 to 0.7 percent of silicon dioxide, 0.5 to 1 percent of sodium chloride, 0.1 to 0.3 percent of chromium oxide and the balance of inevitable impurities.
The triethanolamine is of industrial grade, and the purity of the triethanolamine is more than 85 percent.
The triisopropanolamine is in industrial grade, and the purity of the triisopropanolamine is more than 95 percent.
The gypsum is dihydrate gypsum with the purity of more than 95 percent.
The fly ash is grade I or II fly ash meeting the requirements of national standard fly ash for cement and concrete (GB 1596-2005).
The preparation method of the early-strength powder slag grinding aid specifically comprises the following steps:
weighing all raw materials according to the formula, adding organic reagents such as triethanolamine, triisopropanolamine and the like into quantitative absolute ethyl alcohol, and placing the mixture on a magnetic stirrer to stir for 10-30min at 700r/min to enable the mixture to be dissolved uniformly.
And step two, adding powder materials such as desulfurized and denitrified ash, gypsum, fly ash and the like, and continuously stirring for 5-10 min to prepare a mixed solution.
And step three, placing the mixed solution into a vacuum drying instrument for drying for 3-6 hours to obtain the early strength powder slag grinding aid with the core-shell structure.
The absolute ethyl alcohol in the step one is industrial grade absolute ethyl alcohol with the purity of more than 99%.
The mass ratio of the total amount of the raw materials weighed according to the formula to the absolute ethyl alcohol in the first step is 1: 15-1: 30.
The invention takes desulfurization and denitrification ash, triethanolamine, triisopropanolamine, fly ash, gypsum and the like as raw materials, and the action and mechanism are as follows:
the raw material composition aspect is as follows: the main component of the desulfurization and denitrification ash is sodium sulfate, and the sulfate is a common mineral powder activity excitant. On one hand, the functional component sodium sulfate in the desulfurization and denitrification ash promotes slag hydration reaction to generate hydration reaction product ettringite, optimizes the pore structure of a hardened body, reduces the number of harmful macropores, improves the structural compactness, and improves the material strength and the slag activity index; on the other hand, the desulfurization and denitrification ash particles are small in particle size and large in specific surface area, and are beneficial to adsorption of organic reagents such as triethanolamine and triisopropanolamine. The fly ash is a spherical powder material, and can play a role in adsorbing an organic reagent, optimizing the particle grading of the powder grinding aid and improving the grinding aid grinding efficiency of the grinding aid in the grinding process. Inorganic materials such as gypsum and the like are used as auxiliary reagents, and the main function is to improve the physical and chemical stability of the grinding aid. Triethanolamine and triisopropanolamine in the grinding aid are organic reagents with good grinding aid effect, and the functions of the grinding aid are to modify surface charges of ground materials, prevent cracks from healing, agglomerate fine particles and improve grinding aid efficiency.
The preparation method of the grinding aid comprises the following steps: ethanol is used as a solvent to dissolve organic reagent components, then the organic reagent components and the inorganic powder material are compounded to form a mixed solution, and the powder material is formed by vacuum drying, which has the advantages that: on one hand, the organic reagent is adsorbed on the surface of the inorganic powder material to form a core-shell structure, so that the grinding aid efficiency is improved, and the solid waste functional component sodium sulfate is inhibited from escaping in equipment due to high temperature, and the slag activity enhancing effect of the inorganic powder material is improved; on the other hand, the ethanol reagent dried in vacuum can be recycled through industrial collection, so that the recycling is realized, and the environmental load and the production cost are reduced.
The invention has the following advantages:
1. the slag grinding aid is added into mineral powder for grinding, so that the yield is increased by over 30 percent;
2. the slag grinding aid can obviously improve the specific surface area of slag micropowder, and the specific surface area is increased by 24-36 m2Per kg, the residue of a sieve with the size of 45 mu m is reduced by 3 to 7 percent;
3. the slag grinding aid can obviously improve the activity index of slag micropowder and improve the grade of slag;
4. the main component of the product is the desulfurization and denitrification ash which is solid waste after desulfurization and denitrification of the flue gas of the glass furnace kiln, so that the solid waste is utilized as building materials, and the product has good popularization and application prospects;
5. the preparation method of the slag grinding aid is simple and easy to operate, and the prepared grinding aid is stable in performance.
Drawings
FIG. 1 shows the phase composition of desulfurized and denitrified ash;
FIG. 2 is a shape chart of desulfurized and denitrified ash.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments:
example 1:
1) weighing 40 parts of desulfurization and denitrification ash, 3 parts of triethanolamine, 5 parts of triisopropanolamine, 25 parts of fly ash and 10 parts of gypsum according to the following weight parts.
2) Sequentially adding triethanolamine and triisopropanolamine into quantitative absolute ethyl alcohol, and stirring for 30min at the speed of 700r/min on a magnetic stirrer. After being uniformly dispersed, inorganic powder materials (desulfurization and denitrification ash and fly ash) are added, and the mixture is continuously stirred for 10 min. And (3) placing the mixed solution into a vacuum drying instrument for drying for 6 hours to obtain the powder slag grinding aid.
Example 2:
1) weighing 45 parts of desulfurization and denitrification ash, 4 parts of triethanolamine, 4 parts of triisopropanolamine, 18 parts of fly ash and 9 parts of gypsum according to the following weight parts.
2) Sequentially adding triethanolamine and triisopropanolamine into quantitative absolute ethyl alcohol, and stirring for 20min at the speed of 700r/min on a magnetic stirrer. After being uniformly dispersed, inorganic powder materials (desulfurization and denitrification ash and fly ash) are added, and the mixture is continuously stirred for 8 min. And (4) placing the mixed solution into a vacuum drying instrument for drying for 4 hours to obtain the powder slag grinding aid.
Example 3:
1) weighing 50 parts of desulfurization and denitrification ash, 5 parts of triethanolamine, 3 parts of triisopropanolamine, 20 parts of fly ash and 6 parts of gypsum according to the following weight parts.
2) Sequentially adding triethanolamine and triisopropanolamine into quantitative absolute ethyl alcohol, and stirring for 15min at the speed of 700r/min on a magnetic stirrer. After being uniformly dispersed, inorganic powder materials (desulfurization and denitrification ash and fly ash) are added, and the mixture is continuously stirred for 10 min. And (3) placing the mixed solution into a vacuum drying instrument for drying for 5 hours to obtain the powder slag grinding aid.
Example 4:
1) 55 parts of desulfurization and denitrification ash, 6 parts of triethanolamine, 2 parts of triisopropanolamine, 23 parts of fly ash and 5 parts of gypsum are weighed according to the following weight parts.
2) Sequentially adding triethanolamine and triisopropanolamine into quantitative absolute ethyl alcohol, and stirring for 10min at the speed of 700r/min on a magnetic stirrer. After being uniformly dispersed, inorganic powder materials (desulfurization and denitrification ash and fly ash) are added, and the mixture is continuously stirred for 10 min. And (3) placing the mixed solution into a vacuum drying instrument for drying for 5 hours to obtain the powder slag grinding aid.
Example 5:
1) 60 parts of desulfurization and denitrification ash, 8 parts of triethanolamine, 1 part of triisopropanolamine, 25 parts of fly ash and 3 parts of gypsum are weighed according to the following weight parts.
2) Sequentially adding triethanolamine and triisopropanolamine into quantitative absolute ethyl alcohol, and stirring for 25min at the speed of 700r/min on a magnetic stirrer. After being uniformly dispersed, inorganic powder materials (desulfurization and denitrification ash and fly ash) are added, and the mixture is continuously stirred for 9 min. And (3) placing the mixed solution into a vacuum drying instrument for drying for 6 hours to obtain the powder slag grinding aid. .
Example 6:
1) 60 parts of desulfurization and denitrification ash, 6 parts of triethanolamine, 1 part of triisopropanolamine, 23 parts of fly ash and 3 parts of gypsum are weighed according to the following weight parts.
2) Sequentially adding triethanolamine and triisopropanolamine into quantitative absolute ethyl alcohol, and stirring for 25min at the speed of 700r/min on a magnetic stirrer. After being uniformly dispersed, inorganic powder materials (desulfurization and denitrification ash and fly ash) are added, and the mixture is continuously stirred for 5 min. And (3) placing the mixed solution into a vacuum drying instrument for drying for 3 hours to obtain the powder slag grinding aid.
The product of the above example and the blank slag (i.e., without any grinding aid incorporated) were used as materials for the following experiments. The product according to the above embodiment is mixed with slag in advance according to a certain mixing amount and then ground in a ball mill. 3kg of slag is ground each time, and the grinding time is set to be 60 min.
TABLE 1 Experimental data for grinding aid and no grinding aid
The above experiment was carried out strictly in accordance with the standards of "general portland cement" (national standard of the people's republic of China GB175-2007), "industry standard of cement grinding aid" and "granulated blast furnace slag powder for use in cement and concrete" (national standard of the people's republic of China GB/T18046-.
As can be seen from Table 1, the specific surface area is increased by 24-36 m when the grinding aid is added compared with that when the grinding aid is not added2The activity index of the mineral powder increases from S75 grade to S95 grade, thereby showing that the addition of the slag grinding aid can improve the activity and the specific surface area of the mineral powder.
The protective scope of the present invention is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present invention by those skilled in the art without departing from the scope and spirit of the present invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (9)
1. The early-strength powder slag grinding aid is characterized by being prepared from the following raw materials in parts by weight: 40-60 parts of desulfurization and denitrification ash, 3-8 parts of triethanolamine, 1-5 parts of triisopropanolamine, 15-25 parts of fly ash and 3-10 parts of gypsum.
2. The early strength powder slag grinding aid as claimed in claim 1, wherein: the desulfurization and denitrification ash is solid waste after desulfurization and denitrification treatment of flue gas, and comprises the following chemical components in percentage by weight: 40 to 50 percent of sodium oxide, 45 to 52 percent of sulfur trioxide, 0.1 to 0.4 percent of magnesium oxide, 0.3 to 0.7 percent of silicon dioxide, 0.5 to 1 percent of sodium chloride, 0.1 to 0.3 percent of chromium oxide and the balance of inevitable impurities.
3. The early strength powder slag grinding aid as claimed in claim 1, wherein: the triethanolamine is of industrial grade, and the purity of the triethanolamine is more than 85 percent.
4. The early strength powder slag grinding aid as claimed in claim 1, wherein: the triisopropanolamine is in industrial grade, and the purity of the triisopropanolamine is more than 95 percent.
5. The early strength powder slag grinding aid as claimed in claim 1, wherein: the gypsum is dihydrate gypsum with the purity of more than 95 percent.
6. The early strength powder slag grinding aid as claimed in claim 1, wherein: the fly ash is grade I or II fly ash which meets the regulation of national standard fly ash for cement and concrete.
7. The preparation method of the early strength powder slag grinding aid as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
weighing all raw materials according to the formula, adding organic reagents such as triethanolamine, triisopropanolamine and the like into quantitative absolute ethyl alcohol, and placing the mixture on a magnetic stirrer to stir for 10-30min at 700r/min to enable the mixture to be dissolved uniformly;
adding powder materials such as desulfurized and denitrified ash, gypsum, fly ash and the like, and continuously stirring for 5-10 min to prepare a mixed solution;
and step three, placing the mixed solution into a vacuum drying instrument for drying for 3-6 hours to obtain the early strength powder slag grinding aid with the core-shell structure.
8. The method for preparing the early strength powder slag grinding aid according to claim 7, wherein the absolute ethyl alcohol in the first step is industrial grade absolute ethyl alcohol with the purity of more than 99%.
9. The preparation method of the early strength powder slag grinding aid according to claim 7, wherein the mass ratio of the total amount of the raw materials weighed according to the formula to the absolute ethyl alcohol is 1: 15-1: 30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010802298.3A CN111995265A (en) | 2020-08-11 | 2020-08-11 | Early-strength powder slag grinding aid and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163162A (en) * | 2021-12-24 | 2022-03-11 | 常州坚鹏建材有限公司 | Mineral powder hardening grinding aid and grinding-aid process thereof |
| CN116217114A (en) * | 2023-01-17 | 2023-06-06 | 广州市建筑科学研究院集团有限公司 | Powder-liquid composite slag grinding aid and preparation method and application thereof |
-
2020
- 2020-08-11 CN CN202010802298.3A patent/CN111995265A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 陈伟等: "脱硫脱硝灰为基体制备早强型粉体矿渣助磨剂性能研究", 《硅酸盐通报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163162A (en) * | 2021-12-24 | 2022-03-11 | 常州坚鹏建材有限公司 | Mineral powder hardening grinding aid and grinding-aid process thereof |
| CN114163162B (en) * | 2021-12-24 | 2022-08-09 | 常州坚鹏建材有限公司 | Mineral powder hardening grinding aid and grinding-aid process thereof |
| CN116217114A (en) * | 2023-01-17 | 2023-06-06 | 广州市建筑科学研究院集团有限公司 | Powder-liquid composite slag grinding aid and preparation method and application thereof |
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