CN116535122A - Grinding and activating method for steel slag and steel slag grinding-assisting activating agent - Google Patents
Grinding and activating method for steel slag and steel slag grinding-assisting activating agent Download PDFInfo
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- CN116535122A CN116535122A CN202310535582.2A CN202310535582A CN116535122A CN 116535122 A CN116535122 A CN 116535122A CN 202310535582 A CN202310535582 A CN 202310535582A CN 116535122 A CN116535122 A CN 116535122A
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- steel slag
- parts
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- phase change
- change material
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 130
- 239000010959 steel Substances 0.000 title claims abstract description 130
- 239000002893 slag Substances 0.000 title claims abstract description 127
- 238000000227 grinding Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000003213 activating effect Effects 0.000 title claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 title abstract description 6
- 239000012782 phase change material Substances 0.000 claims abstract description 55
- 239000000843 powder Substances 0.000 claims abstract description 48
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 44
- 239000012190 activator Substances 0.000 claims abstract description 41
- TZCPCKNHXULUIY-RGULYWFUSA-N 1,2-distearoyl-sn-glycero-3-phosphoserine Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@H](COP(O)(=O)OC[C@H](N)C(O)=O)OC(=O)CCCCCCCCCCCCCCCCC TZCPCKNHXULUIY-RGULYWFUSA-N 0.000 claims abstract description 40
- ZWZWYGMENQVNFU-UHFFFAOYSA-N Glycerophosphorylserin Natural products OC(=O)C(N)COP(O)(=O)OCC(O)CO ZWZWYGMENQVNFU-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 40
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 40
- 239000002245 particle Substances 0.000 claims abstract description 36
- 239000004005 microsphere Substances 0.000 claims abstract description 35
- 239000000839 emulsion Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims description 20
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 claims description 16
- 239000012188 paraffin wax Substances 0.000 claims description 13
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 12
- 229910002651 NO3 Inorganic materials 0.000 claims description 12
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 12
- 150000003839 salts Chemical class 0.000 claims description 10
- 239000005639 Lauric acid Substances 0.000 claims description 8
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 claims description 8
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 8
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 6
- 235000021314 Palmitic acid Nutrition 0.000 claims description 4
- 235000021355 Stearic acid Nutrition 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 4
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 claims description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 4
- 239000008117 stearic acid Substances 0.000 claims description 4
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 229960002089 ferrous chloride Drugs 0.000 claims description 3
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 235000019809 paraffin wax Nutrition 0.000 claims description 2
- 235000019271 petrolatum Nutrition 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 18
- 230000000052 comparative effect Effects 0.000 description 28
- -1 alcohol amines Chemical class 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 235000010755 mineral Nutrition 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 150000001412 amines Chemical class 0.000 description 4
- 239000011790 ferrous sulphate Substances 0.000 description 4
- 235000003891 ferrous sulphate Nutrition 0.000 description 4
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 150000005846 sugar alcohols Polymers 0.000 description 4
- MTCFGRXMJLQNBG-REOHCLBHSA-N (2S)-2-Amino-3-hydroxypropansäure Chemical compound OC[C@H](N)C(O)=O MTCFGRXMJLQNBG-REOHCLBHSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical group CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000013379 molasses Nutrition 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 229960001153 serine Drugs 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- PORPENFLTBBHSG-MGBGTMOVSA-N 1,2-dihexadecanoyl-sn-glycerol-3-phosphate Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP(O)(O)=O)OC(=O)CCCCCCCCCCCCCCC PORPENFLTBBHSG-MGBGTMOVSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- MTCFGRXMJLQNBG-UHFFFAOYSA-N Serine Natural products OCC(N)C(O)=O MTCFGRXMJLQNBG-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 125000002252 acyl group Chemical group 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000008052 alkyl sulfonates Chemical class 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 229940044172 calcium formate Drugs 0.000 description 1
- 235000019255 calcium formate Nutrition 0.000 description 1
- 239000004281 calcium formate Substances 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000004530 micro-emulsion Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000002077 nanosphere Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000008054 sulfonate salts Chemical class 0.000 description 1
- 230000009044 synergistic interaction Effects 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 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
- 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
- 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
- C04B20/023—Chemical treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a grinding and activating method of steel slag and a steel slag grinding-assisting activating agent, and relates to the technical field of steel slag grinding; the steel slag grinding-assisting activator comprises 15-30 parts of phase change material, 10-20 parts of phosphatidylserine, 10-15 parts of polyvinyl alcohol nano-microspheres, 5-10 parts of inorganic salt, 1-5 parts of redispersible emulsion powder and 100 parts of water; then adding inorganic salt, redispersible emulsion powder and water into the steel slag particles, and grinding for 5-10min; then adding phase change material, phosphatidylserine and polyvinyl alcohol nanometer microsphere, grinding for 10-15min to obtain steel slag micropowder. The invention shortens grinding time and simultaneously can obtain the steel slag micro powder with smaller particle size, larger specific surface area and stronger activity in a shorter time.
Description
Technical Field
The invention relates to the technical field of steel slag grinding, in particular to a grinding and activating method of steel slag and a steel slag grinding-assisting activating agent.
Background
The steel slag is the waste slag generated in the steel industry steelmaking process, the generated quantity can account for 8-15% of the coarse steel yield, the annual steel slag discharged by the metallurgical industry in China exceeds 1 hundred million tons, but the current utilization rate is only 22%, and compared with the national steel slag sent to Europe and America, the steel slag has larger difference. The accumulated steel slag not only pollutes the ecological environment, but also severely restricts the sustainable development of steel enterprises. Along with the high-speed development of the economy in China, the building material raw materials are gradually exhausted, so that the use of the steel slag in the field of cement-based building materials is an ideal way for exerting high added value of the steel slag in the long term.
The chemical components of the steel slag mainly comprise CaO and SiO 2 、FeO、Fe 2 O 3 、Al 2 O 3 Minerals such as MgO, etc. the CaO content is more than 30%, mainly C 2 S、C 3 The S and other mineral forms exist, and the mineral composition of the S and other mineral forms is similar to that of cement clinker; can be theoretically used as a concrete raw material for building and road and bridge engineering. However, since the steel slag undergoes a high-temperature calcination process in the steel smelting process, only amorphous glass-like substances have low activity, and the use effect is not particularly obvious. To fully exert the property of the steel slag micropowder, the steel slag micropowder must be ground to enough fineness to prepare the steel slag micropowder, i.e. the specific surface area is not less than 400m 2 /kg. However, the steel slag has the problems of poor grindability, high power consumption and the like, and the power consumption is about 2-3 times of that of the ground cement clinker, so that the utilization of the steel slag is restricted to a certain extent. Therefore, how to effectively improve the grinding efficiency of the steel slag micro powder is a hot spot problem for promoting the large-scale application of the steel slag micro powder at present.
The common method for improving the grinding efficiency of the steel slag and reducing the energy consumption is to add grinding aids during grinding. The main raw materials of the traditional grinding aid are amines, alcohols (such as ethylene glycol, glycerol and the like), alcohol amines (such as triethanolamine, triisopropanolamine and the like), lignin sulfonate salts, fatty acids and salts thereof, alkyl sulfonate salts and the like. In the prior art, for example, the active grinding aid for grinding steel slag by a vertical mill provided by Chinese patent No. 113135688B adopts molasses, triethylene glycol, aluminum sulfate and calcium formate as active excitation components, adopts alcohol amine, citric acid and the like as grinding aid components, so as to reduce the fluidity of the steel slag powder and improve the activity and specific surface area of the steel slag powder. For example, the superfine composite mineral admixture grinding aid provided by Chinese patent No. 113003981B adopts modified polyhydroxy alcohol amine, saccharides and inorganic salt as raw materials, the modified polyhydroxy alcohol amine is prepared by heating alcohol amine, acid anhydride and alcohol for reaction, and the chain length and the hydroxyl number of the modified polyhydroxy alcohol amine are utilized to reduce the agglomeration phenomenon of steel slag powder. For example, the liquid grinding aid provided by Chinese patent No. 108424011A, wherein the grinding aid component in the raw materials is polyether modified siloxane surfactant, the cosolvent is citric acid, the inorganic salt consists of sodium nitrite and sulfate, and the inorganic salt solubilizer is ethyl acetate; by utilizing polyether modified siloxane surfactant to adsorb on the surface of steel slag particles, the surface hardness and strength of the steel slag particles are changed, the cracks of the steel slag particles are increased, and recombination is prevented. Inorganic salts also prevent fracture face recombination. For example, the mineral admixture grinding aid excitant provided by Chinese patent application CN115321871A adopts modified compound polyalcohol amine, compound polyalcohol, sodium thiocyanate, polyacrylamide and molasses as raw materials; the modified compound polyalcohol amine is prepared from compound polyalcohol amine and sodium methylene dinaphthyl sulfonate. These grinding aids either have a long grinding time, or have limited maximum specific surface area and minimum particle size that can be achieved, or use excessive raw material costs.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a grinding and activating method of steel slag and a steel slag grinding-assisting activating agent, which are realized by the following technology.
A grinding and activating method of steel slag comprises the following steps:
s1, taking coarse-ground steel slag particles, and weighing a steel slag grinding-assisting activator according to the mixing amount of 0.1-0.3%;
the raw materials of the steel slag grinding-assisting activator comprise, by weight, 15-30 parts of phase change materials, 10-20 parts of phosphatidylserine, 10-15 parts of polyvinyl alcohol nano microspheres, 5-10 parts of inorganic salts, 1-5 parts of redispersible emulsion powder and 100 parts of water; the phase change material is at least one of stearic acid, palmitic acid, paraffin and lauric acid; the inorganic salt is ferric salt and/or ferrous salt with acidic pH value, such as at least one of ferric nitrate, ferrous nitrate, ferric chloride or ferrous chloride;
s2, adding inorganic salt, redispersible emulsion powder and water into the steel slag particles, and grinding for 5-10min; then adding phase change material, phosphatidylserine and polyvinyl alcohol nanometer microsphere, grinding for 10-15min; and finally, cooling to room temperature, and grinding again for 1-3min to obtain the steel slag micro powder.
The invention also provides a steel slag grinding-assisting activator, which comprises, by weight, 15-30 parts of a phase change material, 10-20 parts of phosphatidylserine, 10-15 parts of polyvinyl alcohol nano-microspheres, 5-10 parts of inorganic salt, 1-5 parts of redispersible emulsion powder and 100 parts of water; the phase change temperature of the phase change material is 40-65 ℃; the inorganic salt is ferric salt and/or ferrous salt with acidic pH value.
Preferably, the mass ratio of the phase change material to the phosphatidylserine to the polyvinyl alcohol nanoparticle is 2:1.5:1.
More preferably, the raw materials comprise, by weight, 24 parts of phase change materials, 18 parts of phosphatidylserine, 12 parts of polyvinyl alcohol nano-microspheres, 8 parts of inorganic salts, 3 parts of redispersible emulsion powder and 100 parts of water.
Preferably, the phase change material is at least one of stearic acid, palmitic acid, paraffin wax and lauric acid.
Preferably, the inorganic salt is at least one of ferric nitrate, ferrous nitrate, ferric chloride or ferrous chloride.
The steel slag grinding-assisting activator provided by the invention has the advantages that the inorganic salt, the redispersible emulsion powder and the water are firstly and uniformly mixed with the steel slag particles, the inorganic salt and the redispersible emulsion powder are used for increasing the viscosity of steel slag particle materials, and simultaneously, the roughness of the surfaces of the steel slag particles is continuously increased so as to accelerate the cracking of the steel slag particles and assist in liftingSubsequent deep grinding aid effect. The polyvinyl alcohol nanometer microsphere is that the molecular main chain contains a large amount of-CH 2 -CH (OH) -group high polymers with porous microspheroidal structure. After adding phase-change material, phosphatidylserine and polyvinyl alcohol nano-microsphere, with grinding, the environment temperature is gradually raised, the phase-change material is gradually changed from solid state to liquid state, based on good hydrophilicity and adsorptivity of polyvinyl alcohol nano-microsphere, the phase-change material, the polyvinyl alcohol nano-microsphere, the phosphatidylserine and the water added before form microemulsion, the polyvinyl alcohol nano-microsphere can adsorb the compounds such as phase-change material, phosphatidylserine and the like through intermolecular chemical bonds, crosslinking and porous structures, so that the surface of the compound is grafted with more and dense active groups, and the compound is grafted with SiO in steel slag powder 2 The isoacidic materials are combined through the electrovalence bonds, so that the phase change materials, the polyvinyl alcohol nanospheres, the phosphatidylserine and other grinding aid materials can be more uniformly attached to the surfaces and cracks of the steel slag particles, the possibility of re-agglomeration of the steel slag micro powder is prevented, and the grinding aid effect is improved. Phosphatidylserine is an acyl derivative used for describing phosphatidic acid, wherein the phosphoric acid part is esterified with serine (L-serine in general), has good hydrophilicity and lipophilicity, can be matched with other raw materials through hydrogen bond/coordination bond to form a staggered network structure, and plays a synergistic effect with the raw materials such as redispersible emulsion powder and the like to improve the viscosity of steel slag particles. Along with the mechanical stirring of the grinding equipment and the mutual friction collision of steel slag particles, the raw materials of the grinding aid also continuously permeate into cracks of the steel slag particles, so that the accelerated fragmentation of the steel slag particles is promoted; the surface of the broken steel slag particles can be adhered with new grinding aid raw materials, so that the steel slag particles are further promoted to be finally ground into steel slag micro powder with larger specific surface area and smaller particle size, the dispersibility of the ground steel slag micro powder is improved, and the re-agglomeration of the steel slag particles is avoided. In addition, in the finishing stage of grinding, as the ambient temperature gradually decreases, the phase change material gradually returns to a solid state again, and the phase change material, the polyvinyl alcohol nano microspheres and other raw materials remained in the steel slag cracks can cause stress concentration in the internal cracks of the steel slag, so that the steel slag can be crushed further finally.
In order to ensure the grinding-assisting effect, the traditional steel slag grinding aid always needs to maintain a higher ambient temperature (80-90 ℃) during grinding, and the grinding-assisting effect is influenced by too low or too high grinding temperature. This means a higher temperature control requirement for the grinding apparatus, which in turn increases the production costs. The steel slag grinding-assisting activator provided by the invention only needs to utilize friction heat generated during grinding, utilizes the phase change characteristic of a phase change material, and utilizes the synergistic cooperation of inorganic salt, redispersible emulsion powder, phosphatidylserine and polyvinyl alcohol nano microspheres, so that the viscosity of steel slag particle materials during grinding is ensured, the dispersibility of steel slag micro powder after grinding is ensured, and the cost is effectively saved.
Compared with the prior art, the invention has the following advantages: compared with the existing steel slag grinding aid and grinding technology, the invention further reduces the cost, shortens the grinding time by 20-30%, and can obtain the steel slag micro powder with smaller particle size, larger specific surface area and stronger activity in a shorter time by utilizing the synergistic interaction between the phase change material, phosphatidylserine, the polyvinyl alcohol nano microsphere, the inorganic salt and the redispersible emulsion powder; the specific surface area is up to 884.7 square meters per kg.
Detailed Description
The following description of the present invention will be made clearly and fully, and it is apparent that the embodiments described are only some, but not all, of the embodiments of the present invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present invention, are within the scope of the present invention.
In the steel slag grinding-assisted activator provided in the following examples and comparative examples, raw materials of polyvinyl alcohol nano-microspheres (with the particle size of about 0.5-0.8 μm) and phosphatidylserine are obtained by online purchase. The phosphatidylserine used may be naturally extracted or artificially synthesized, although it is a mixture containing many isomers. Numerous experimental and theoretical analyses have shown that the selection of the type of these isomers of phosphatidylserine has little effect on the performance of the grinding aid activators of the present invention. The phase-change material uses paraffin wax (phase-change temperature is 56-58 ℃) and lauric acid (phase-change temperature is 41-43 ℃), and the inorganic salt uses ferrous nitrate and ferrous sulfate, and the specific selection depends on the specific conditions of each example and comparative example. Redispersible emulsion powders are also commercially available products that are randomly purchased.
Example 1
The steel slag grinding-assisting activator provided by the embodiment comprises, by weight, 24 parts of phase change materials, 18 parts of phosphatidylserine, 12 parts of polyvinyl alcohol nano-microspheres, 8 parts of inorganic salts, 3 parts of redispersible emulsion powder and 100 parts of water; the phase change material is paraffin; the inorganic salt is ferrous nitrate.
The using method of the steel slag grinding-assisting activator provided by the embodiment is as follows:
s1, taking coarse-ground steel slag particles, and weighing a steel slag grinding-assisting activator according to the mixing amount of 0.2%;
s2, adding inorganic salt, redispersible emulsion powder and water into the steel slag particles, and grinding for 10min; then adding phase change material, phosphatidylserine and polyvinyl alcohol nanometer microsphere, grinding for 15min; and finally, cooling to room temperature, and grinding for 2min again to obtain the steel slag micro powder.
Example 2
The steel slag grinding-assisting activator provided by the embodiment comprises, by weight, 15 parts of a phase change material, 20 parts of phosphatidylserine, 10 parts of polyvinyl alcohol nano-microspheres, 10 parts of inorganic salt, 1 part of redispersible emulsion powder and 100 parts of water; lauric acid is selected as the phase change material; the inorganic salt is ferrous sulfate. The method of using the steel slag grinding-assisting activator of this example was the same as that of example 1.
Example 3
The steel slag grinding-assisting activator provided by the embodiment comprises, by weight, 30 parts of a phase change material, 10 parts of phosphatidylserine, 15 parts of polyvinyl alcohol nano-microspheres, 5 parts of inorganic salt, 5 parts of redispersible emulsion powder and 100 parts of water; lauric acid and paraffin are selected as phase change materials, and the mass ratio is 1:1; the inorganic salt is selected from ferrous sulfate and ferrous nitrate with a mass ratio of 1:1. The method of using the steel slag grinding-assisting activator of this example was the same as that of example 1.
Comparative example 1
The steel slag grinding-assisting activator provided by the comparative example comprises, by weight, 30 parts of a phase-change material, 5 parts of phosphatidylserine, 5 parts of polyvinyl alcohol nano-microspheres, 10 parts of inorganic salt, 5 parts of redispersible emulsion powder and 100 parts of water, wherein the phase-change material is paraffin, and the inorganic salt is ferrous nitrate. The method of using the steel slag grinding aid activator of this comparative example was the same as in example 1.
Comparative example 2
The steel slag grinding-assisting activator provided by the comparative example comprises, by weight, 15 parts of a phase-change material, 35 parts of phosphatidylserine, 20 parts of polyvinyl alcohol nano-microspheres, 10 parts of inorganic salt, 5 parts of redispersible emulsion powder and 100 parts of water, wherein the phase-change material is paraffin, and the inorganic salt is ferrous nitrate. The method of using the steel slag grinding aid activator of this comparative example was the same as in example 1.
Comparative example 3
The steel slag grinding-assisting activator provided by the comparative example comprises, by weight, 24 parts of a phase-change material, 30 parts of polyvinyl alcohol nano-microspheres, 8 parts of inorganic salt, 3 parts of redispersible emulsion powder and 100 parts of water, wherein the phase-change material is paraffin, and the inorganic salt is ferrous nitrate. The method of using the steel slag grinding aid activator of this comparative example was substantially the same as in example 1, except that phosphatidylserine was not added in step S2.
Comparative example 4
The steel slag grinding-assisting activator provided by the comparative example comprises, by weight, 24 parts of a phase-change material, 30 parts of phosphatidylserine, 8 parts of inorganic salt, 3 parts of redispersible emulsion powder and 100 parts of water, wherein the phase-change material is paraffin, and the inorganic salt is ferrous nitrate. The method of using the steel slag grinding-assisting activator of this comparative example was substantially the same as in example 1, except that no polyvinyl alcohol nanomicrospheres were added in step S2.
Comparative example 5
The steel slag grinding-assisting activator provided by the comparative example comprises, by weight, 18 parts of phosphatidylserine, 12 parts of polyvinyl alcohol nano-microspheres, 8 parts of inorganic salt, 3 parts of redispersible emulsion powder and 100 parts of water, wherein the inorganic salt is ferrous nitrate. The method of using the steel slag grinding aid activator of this comparative example was substantially the same as in example 1, except that no phase change material was added in step S2.
Comparative example 6
The steel slag grinding-assisting activator provided by the comparative example comprises, by weight, 24 parts of a phase-change material, 18 parts of phosphatidylserine, 12 parts of polyvinyl alcohol nano-microspheres, 3 parts of redispersible emulsion powder and 100 parts of water, wherein the phase-change material is paraffin. The method of using the steel slag grinding aid activator of this comparative example was substantially the same as in example 1, except that no inorganic salt was added in step S2.
Test example 1: grinding aid effect comparison of the Steel slag grinding aid activators of examples and comparative examples
The steel slag raw material samples used in the test are steel slag particles which are sold in the market and subjected to coarse grinding, and each steel slag raw material sample is 5kg; is detected to have the original fineness D 50 About 8.74 μm and a specific surface area of about 426 square meters per kg. The steel slag grinding aid activators of the above examples and comparative examples, respectively, were used for grinding in a ball mill. Meanwhile, the steel slag raw material sample without any grinding aid is subjected to ball milling and is used as a blank control. After finishing grinding, analyzing and detecting the fineness and specific surface area of the ground product; meanwhile, the repose angle of the initial product after grinding for 10min is also detected when grinding the various examples and comparative examples, wherein the inorganic salt, the redispersible emulsion powder and the water are added in the step S2; the specific results are shown in table 1 below.
TABLE 1 grinding aid Effect of Steel slag grinding aid activator
The test results show that the steel slag grinding-assisted activator prepared by the technical scheme of the invention can ensure that the fineness of the steel slag micro powder is as low as 5.02 mu m and the specific surface area is as high as 884.7 square meters/kg only by grinding for about 25 min. Compared with the traditional grinding, the powder method and the grinding-assisting activating agent provided by the invention can greatly shorten the time consumption, and simultaneously obviously improve the grinding effect, and the activity index of the ground steel slag micro powder is obviously improved.
As can be seen from comparative examples 1-3, the phase change material adopts lauric acid and/or paraffin, the inorganic salt adopts ferrous sulfate and/or ferrous nitrate, and the grinding-assisting performance of the steel slag grinding-assisting activator can be obviously improved.
As can be seen from comparative example 1, comparative example 1 and comparative example 2, the fineness D was determined by changing the amounts of the phase change material, phosphatidylserine, polyvinyl alcohol nanomicrospheres, inorganic salt and redispersible emulsion powder 50 The specific surface area and the angle of repose are all affected. The phase change material is too much, the phosphatidylserine and the polyvinyl alcohol nano microsphere are too little, the performance of the phosphatidylserine and the polyvinyl alcohol nano microsphere is limited, and the phosphatidylserine and the polyvinyl alcohol nano microsphere are possibly caused by that the ground steel slag powder is easier to be recombined and agglomerated. When the consumption of the phase-change material is too small and the consumption of the phosphatidylserine and the polyvinyl alcohol nano-microsphere is too large, the phosphatidylserine and the polyvinyl alcohol nano-microsphere can only act on the surface of the steel slag particles, and the phase-change material is difficult to penetrate into cracks of the steel slag particles due to the lack of the effect of the phase-change material, so that the further crushing effect of the phase-change material in the final stage of grinding is limited. These problems all lead to relatively high fineness values and relatively small specific surface areas.
As is clear from comparative examples 1 and 3 to 6, the fineness value is remarkably increased and the specific surface area is remarkably reduced in the absence of any one of the phase change material, phosphatidylserine or polyvinyl alcohol nanomicrospheres. When the inorganic salt is absent, the synergistic effect of the redispersible emulsion powder and the inorganic salt is also very limited, and the rising of the repose angle of the initial product after grinding for 10 minutes is not obvious, so that the subsequent grinding can be influenced. Through analysis, the penetration of other raw materials of the grinding aid activator into cracks of the steel slag particles is directly limited probably due to the lack of the phase change material; when phosphatidylserine or polyvinyl alcohol nano microspheres are absent, the stability of the ground particles is affected, so that the particles are easier to agglomerate again, the viscosity of steel slag materials is reduced, the fluidity is increased, and the grinding effect is indirectly affected; the inorganic salt affects the surface shape (repose angle) of the steel slag particles after the first grinding, and also affects the fluidity of the steel slag particles, thereby affecting the grinding effect during the subsequent second grinding.
The above detailed description describes in detail the practice of the invention, but the invention is not limited to the specific details of the above embodiments. Many simple modifications and variations of the technical solution of the present invention are possible within the scope of the claims and technical idea of the present invention, which simple modifications are all within the scope of the present invention.
Claims (6)
1. The grinding and activating method for the steel slag is characterized by comprising the following steps of:
s1, taking coarse-ground steel slag particles, and weighing a steel slag grinding-assisting activator according to the mixing amount of 0.1-0.3%;
the raw materials of the steel slag grinding-assisting activator comprise, by weight, 15-30 parts of phase change materials, 10-20 parts of phosphatidylserine, 10-15 parts of polyvinyl alcohol nano microspheres, 5-10 parts of inorganic salts, 1-5 parts of redispersible emulsion powder and 100 parts of water; the phase change material is at least one of stearic acid, palmitic acid, paraffin and lauric acid; the inorganic salt is ferric salt and/or ferrous salt with acidic pH value;
s2, adding inorganic salt, redispersible emulsion powder and water into the steel slag particles, and grinding for 5-10min; then adding phase change material, phosphatidylserine and polyvinyl alcohol nanometer microsphere, grinding for 10-15min; and finally, cooling to room temperature, and grinding again for 1-3min to obtain the steel slag micro powder.
2. The steel slag grinding-assisting activator is characterized by comprising, by weight, 15-30 parts of a phase change material, 10-20 parts of phosphatidylserine, 10-15 parts of polyvinyl alcohol nano-microspheres, 5-10 parts of inorganic salt, 1-5 parts of redispersible emulsion powder and 100 parts of water; the phase change temperature of the phase change material is 40-65 ℃; the inorganic salt is ferric salt and/or ferrous salt with acidic pH value.
3. The steel slag grinding-assisted activator according to claim 2, wherein the mass ratio of the phase change material to the phosphatidylserine to the polyvinyl alcohol nano-microspheres is 2:1.5:1.
4. The steel slag grinding-assisted activator according to claim 3, wherein the steel slag grinding-assisted activator comprises, by weight, 24 parts of a phase change material, 18 parts of phosphatidylserine, 12 parts of polyvinyl alcohol nano-microspheres, 8 parts of inorganic salt, 3 parts of redispersible emulsion powder and 100 parts of water.
5. The steel slag grinding aid activator of any one of claims 2-4, wherein the phase change material is at least one of stearic acid, palmitic acid, paraffin wax, lauric acid.
6. The steel slag grinding-assisted activator of any one of claims 2-4, wherein the inorganic salt is at least one of ferric nitrate, ferrous nitrate, ferric chloride, or ferrous chloride.
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