CN113416011A - Mineralized material used in cement grinding process - Google Patents
Mineralized material used in cement grinding process Download PDFInfo
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- CN113416011A CN113416011A CN202110876984.XA CN202110876984A CN113416011A CN 113416011 A CN113416011 A CN 113416011A CN 202110876984 A CN202110876984 A CN 202110876984A CN 113416011 A CN113416011 A CN 113416011A
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- Prior art keywords
- cement
- sodium
- mineralized material
- maleic anhydride
- dimer acid
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- 239000004568 cement Substances 0.000 title claims abstract description 301
- 238000000227 grinding Methods 0.000 title claims abstract description 95
- 239000000463 material Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 68
- 230000008569 process Effects 0.000 title claims abstract description 63
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 143
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 78
- 239000002245 particle Substances 0.000 claims abstract description 74
- -1 triethanolamine ester Chemical class 0.000 claims abstract description 60
- 239000002253 acid Substances 0.000 claims abstract description 57
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical class O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 57
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims abstract description 48
- 235000019345 sodium thiosulphate Nutrition 0.000 claims abstract description 48
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 42
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 42
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 42
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract description 39
- 239000010881 fly ash Substances 0.000 claims abstract description 33
- 239000000126 substance Substances 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims description 38
- 239000007788 liquid Substances 0.000 claims description 29
- 239000000843 powder Substances 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 17
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 claims description 7
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 6
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 4
- 229920005862 polyol Polymers 0.000 claims description 4
- 150000003077 polyols Chemical class 0.000 claims description 4
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 claims description 3
- XYXNTHIYBIDHGM-UHFFFAOYSA-N ammonium thiosulfate Chemical compound [NH4+].[NH4+].[O-]S([O-])(=O)=S XYXNTHIYBIDHGM-UHFFFAOYSA-N 0.000 claims description 3
- FGRVOLIFQGXPCT-UHFFFAOYSA-L dipotassium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane Chemical compound [K+].[K+].[O-]S([O-])(=O)=S FGRVOLIFQGXPCT-UHFFFAOYSA-L 0.000 claims description 3
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 claims description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 3
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 3
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 3
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 3
- BHZRJJOHZFYXTO-UHFFFAOYSA-L potassium sulfite Chemical compound [K+].[K+].[O-]S([O-])=O BHZRJJOHZFYXTO-UHFFFAOYSA-L 0.000 claims description 3
- 235000011151 potassium sulphates Nutrition 0.000 claims description 3
- 235000019252 potassium sulphite Nutrition 0.000 claims description 3
- 150000005846 sugar alcohols Polymers 0.000 claims description 3
- 230000036571 hydration Effects 0.000 abstract description 42
- 238000006703 hydration reaction Methods 0.000 abstract description 42
- 238000005260 corrosion Methods 0.000 abstract description 12
- 230000001681 protective effect Effects 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 10
- 230000002776 aggregation Effects 0.000 abstract description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 8
- 238000005054 agglomeration Methods 0.000 abstract description 8
- 229910052751 metal Inorganic materials 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 230000003647 oxidation Effects 0.000 abstract description 7
- 238000007254 oxidation reaction Methods 0.000 abstract description 7
- 238000001179 sorption measurement Methods 0.000 abstract description 7
- 239000002002 slurry Substances 0.000 abstract description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 abstract 1
- 239000000047 product Substances 0.000 description 21
- 229910000831 Steel Inorganic materials 0.000 description 20
- 230000000694 effects Effects 0.000 description 20
- 239000010959 steel Substances 0.000 description 20
- 239000013078 crystal Substances 0.000 description 16
- 230000001737 promoting effect Effects 0.000 description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 14
- 230000008901 benefit Effects 0.000 description 14
- 238000005242 forging Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000005484 gravity Effects 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 239000000378 calcium silicate Substances 0.000 description 7
- 229910052918 calcium silicate Inorganic materials 0.000 description 7
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 7
- 230000008719 thickening Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000654 additive Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 239000007791 liquid phase Substances 0.000 description 6
- 230000002688 persistence Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 238000009533 lab test Methods 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 235000010755 mineral Nutrition 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000012496 blank sample Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000005536 corrosion prevention Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000012047 saturated solution Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000011882 ultra-fine particle Substances 0.000 description 2
- 241000132023 Bellis perennis Species 0.000 description 1
- 241000282994 Cervidae Species 0.000 description 1
- 235000005633 Chrysanthemum balsamita Nutrition 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000002195 synergetic effect Effects 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/48—Clinker treatment
- C04B7/52—Grinding ; After-treatment of ground cement
Abstract
The invention is suitable for the technical field of cement grinding aids, and provides a mineralized material used in a cement grinding process, which comprises the following substances in percentage by mass: 2-5% of sodium sulfate, 4-7% of sodium thiosulfate, 0-3% of sodium sulfite, 1-3% of maleic anhydride dimer acid triethanolamine ester, 1-3% of ethylene glycol and 79-92% of fly ash. The invention promotes the early hydration of cement by determining proper substances and contents, greatly improves the early hydration rate of cement particles to improve the early strength and considers the hydration durability, promotes the later hydration of the cement by sodium thiosulfate, maleic anhydride dimer acid triethanolamine ester and glycol, increases the strength of cement slurry, can also wrap the surface of the cement particles to form a protective film to eliminate bonding and adsorption agglomeration, and can form an oxidation protective film on the surface of metal to retard the corrosion of reinforcing steel bars.
Description
Technical Field
The invention belongs to the technical field of cement grinding aids, and particularly relates to a mineralized material used in a cement grinding process.
Background
At present, the powder grinding aid used in the cement grinding process has the phenomena that only a large amount of inorganic salt is simply added and NaCl is added without limitation, so that chloride ions in cement exceed the standard, reinforcing steel bars in a concrete building are corroded, the durability of the concrete is seriously influenced, potential safety hazards are caused to the building, and the service life is shortened. The cement powder grinding aid with the chloride ions exceeding the standard does not have the outstanding effect of improving the output of a cement mill and the performance of cement in the cement grinding process, has limited early strength of improving the cement, improves the compressive strength within 3 days and does not exceed 2 MPa, and causes the later strength reduction and the performance of the cement to have a plurality of defects and deficiencies. The powder grinding aid in the market only contains inorganic salt components, has no grinding aid effect in the cement grinding process, and has the side effect of damaging the later compressive strength of the dehydrated mud. Therefore, it is highly desirable to invent a mineralized material used in the cement grinding process to improve these situations.
Disclosure of Invention
The invention provides a mineralized material used in a cement grinding process, and aims to solve the problems that in the prior art, a cement powder grinding aid exceeds the standard of chloride ions and is rusted to reinforcing steel bars, and the durability of concrete and the stability of a concrete building cannot be ensured.
The invention is realized by that, the mineralized material used in the cement grinding process at least comprises: sulfate, thiosulfate, maleic anhydride dimer acid triethanolamine ester, polyol and fly ash; the sulfate is selected from one or more of sodium sulfate, potassium sulfate and magnesium sulfate; the thiosulfate is selected from one or more of sodium thiosulfate, potassium thiosulfate and ammonium thiosulfate; the polyalcohol is one or more selected from ethylene glycol, 1, 4-butanediol, 1, 6-hexanediol and glycerol.
As a further aspect of the present invention, the mineralized material further comprises a sulfite selected from one or more of sodium sulfite, potassium sulfite, and ammonium sulfite.
As a further scheme of the invention, the mineralized material consists of the following substances in percentage by mass: 2-5% of sodium sulfate, 4-7% of sodium thiosulfate, 0-3% of sodium sulfite, 1-3% of maleic anhydride dimer acid triethanolamine ester, 1-3% of ethylene glycol and 79-92% of fly ash.
As a further scheme of the invention, the mineralized material consists of the following substances in percentage by mass: 3-4% of sodium sulfate, 5-6% of sodium thiosulfate, 1-2% of sodium sulfite, 1.5-2.5% of maleic anhydride dimer acid triethanolamine ester, 1.5-2.5% of ethylene glycol and 83-88% of fly ash.
As a further scheme of the invention, the mineralized material consists of the following substances in percentage by mass: 4% of sodium sulfate, 5% of sodium thiosulfate, 2% of sodium sulfite, 2% of maleic anhydride dimer acid triethanolamine ester, 2% of ethylene glycol and 85% of fly ash.
As a further aspect of the present invention, the mineralized material is a solid, the solid is in a powder shape, and the particle size of the powder is 45 microns, and the balance of the sieve is not more than 50%.
The invention provides a preparation method of mineralized materials used in a cement grinding process, which comprises the following steps:
(1) preparing raw materials of sodium sulfate, sodium thiosulfate, sodium sulfite, maleic anhydride dimer acid triethanolamine ester, ethylene glycol and fly ash;
(2) and (2) spraying the liquid raw materials in the step (1) on a mixer by using a liquid metering pump for metering, feeding the powder raw materials in a matched manner by using an automatic feeding system according to a proportion, wherein the feeding process comprises the following components in percentage by mass, 2-5% of sodium sulfate, 4-7% of sodium thiosulfate, 0-3% of sodium sulfite, 1-3% of maleic anhydride dimer acid triethanolamine ester, 1-3% of ethylene glycol and 79-92% of fly ash, and conveying the mixture to the mixer to be fully mixed with the liquid raw materials to obtain a cement mineralized material product.
As a further scheme of the invention, the addition amount of the mineralized material in the cement grinding process is 0.5 percent of the mass of the cement.
The technical principle of the invention is as follows: the invention provides a mineralized material used in the cement grinding process, wherein sodium sulfate, sodium thiosulfate, sodium sulfite, maleic anhydride dimer acid triethanolamine ester and ethylene glycol all have the effect of promoting early hydration of cement, the early hydration rate of cement particles can be greatly improved, calcium, aluminum, iron and silicon ions are separated out from the cement particles in a liquid phase, a cement liquid phase aqueous solution is promoted to form a saturated state in a short time, more C-S-H calcium silicate and C-H gel are formed, new, more stable and more hydrated crystals are separated out from the saturated solution, the crystals are continuously grown along with the passage of time, the crystals are bonded together to form a compact structure by virtue of various attractive forces, and the cement paste can obtain more early strength.
Meanwhile, the sodium thiosulfate, the maleic anhydride dimer acid triethanolamine ester and the ethylene glycol can be wrapped on the surfaces of cement particles in the cement grinding process to form a protective film, so that static electricity among the cement particles is shielded, bonding and adsorption agglomeration among the cement particles are eliminated, the phenomenon of ball pasting and forging caused by the fact that the cement particles are bonded on a steel ball, a steel forging grinding body and a mill lining plate is avoided, the breaking capacity of steel ball and steel forging is kept for a long time, the fineness of the cement particles is finer, and the fineness of the cement is thinned after the mineralized material is added because the fineness control of the cement is fixed in the cement production process, so that the machine-hour yield of the mill can be improved; the specific gravity of the cement is increased by 3-32 microns, so that the cement is more powerful in hydration of cement particles, more cement stones are formed, and the strength of the cement is improved. The three compounds not only have the function of promoting the early hydration of cement, but also have the function of promoting the later hydration of cement, have long persistence on the hydration of the cement, and then the hydration of the cement is continued, new crystals and hydrated calcium silicate gel are precipitated from the solution and are continuously filled in the space of the structure, and the strength of cement paste is continuously increased.
The maleic anhydride dimer acid triethanolamine ester also has the function of corrosion prevention, can form an oxidation protection film on the surface of metal, retards the corrosion of reinforcing steel bars, increases the durability of concrete, improves the stability of concrete buildings and prolongs the service life of the concrete buildings.
The invention has the technical effects that: compared with the cement powder grinding aid in the current market, the cement mineralized material product manufactured by the technical scheme of the invention has the following advantages and positive effects:
1. the invention has the advantages that the chloride ions do not exceed the standard and do not form danger to cement concrete, buildings and personnel. The invention does not add sodium chloride, the chloride ion is not beyond the standard, avoid a large amount of chloride ions from being brought into the cement, seriously affect the performance of the cement, cause the corrosion effect on the reinforcing steel bar, improve the durability and the safety of the concrete building, simultaneously, the invention adds maleic anhydride dimer acid triethanolamine ester, can form an oxidation protection film on the metal surface, retard the corrosion of the reinforcing steel bar, increase the durability of the concrete, improve the safety of the concrete building and prolong the service life of the concrete building.
2. The invention improves the machine hour output of the mill, increases the cement grinding efficiency and reduces the power consumption of cement grinding. The sodium thiosulfate, the maleic anhydride dimer acid triethanolamine ester and the ethylene glycol can be wrapped on the surfaces of cement particles in the cement grinding process to form a protective film, so that static electricity among the cement particles is shielded, bonding and adsorption agglomeration among the cement particles are eliminated, the crushing capacity of steel ball steel forging is kept for a long time, the fineness of the cement particles is finer, and the machine-hour yield of a grinding machine is improved. The industrial test proves that the cement mineralized material can improve the machine hour output of the cement mill by more than 20 percent and save the electric energy by about 7 kilowatt-hour/ton.
3. The invention can improve the compression strength of cement, improve the performance of cement, save the production cost of cement and improve the economic benefit and social benefit. The sodium sulfate, the sodium thiosulfate, the sodium sulfite, the maleic anhydride dimer acid triethanolamine ester and the ethylene glycol have the effect of promoting the early hydration of cement, and can greatly improve the early hydration rate of cement particles, and the three compounds of the sodium thiosulfate, the maleic anhydride dimer acid triethanolamine ester and the ethylene glycol have the effect of promoting the early hydration of the cement, promoting the later hydration of the cement, having long persistence on the hydration of the cement, and continuously increasing the strength of cement paste. After industrial tests and laboratory tests, the compressive strength of the cement mineralized material product produced by adopting the technical scheme is improved by about 8 MPa in 3 days and about 10 MPa in 28 days after the cement mineralized material product is applied to industrial production. The clinker consumption can be reduced by more than 10%, the mixed material is increased by more than 10%, the price difference between the clinker and the mixed material is about 200 yuan/ton, 200 yuan/ton 10% is 20 yuan/ton, the cost of the cement mineralized material is deducted, and the cement has the benefit of 10 yuan per ton. The use amount of coal can be reduced by using less 10 percent of cement clinker, and the use amount of coal can be reducedCO2、SO2、NOxAnd (4) discharging, and laying a foundation for binding and compacting for realizing the carbon peak reaching and carbon neutralization ambitious planning targets.
4. The invention improves and optimizes the cement performance, reduces the water demand for thickening the cement, and improves the compatibility of the cement, the concrete and the additive thereof. After the cement mineralized material product produced by the technical scheme of the invention is applied to industrial production, as the cement particle composition is more reasonable in the cement grinding process, although the integral fineness of the cement is reduced, the cement particle composition is in stepwise reasonable arrangement, the coarse and fine cement particles are optimized, and the water demand for the cement thickening is not increased, but is reduced. The reduction of the water requirement for the standard thickening of the cement improves the compatibility of the cement, the concrete and additives thereof, and improves and optimizes the cement performance.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In one embodiment of the present invention, there is provided a mineralized material for use in a cement grinding process, the mineralized material comprising at least: sulfate, thiosulfate, maleic anhydride dimer acid triethanolamine ester, polyol and fly ash; the sulfate is selected from one or more of sodium sulfate, potassium sulfate and magnesium sulfate; the thiosulfate is selected from one or more of sodium thiosulfate, potassium thiosulfate and ammonium thiosulfate; the polyalcohol is one or more selected from ethylene glycol, 1, 4-butanediol, 1, 6-hexanediol and glycerol.
As an embodiment of the present invention, the mineralized material further comprises a sulfite selected from one or more of sodium sulfite, potassium sulfite, and ammonium sulfite. The sodium sulfate, the sodium thiosulfate, the sodium sulfite and the fly ash in the mineralized material are all powder, maleic anhydride dimer acid triethanolamine ester and ethylene glycol are liquid, and maleic anhydride dimer acid triethanolamine ester is purchased in the market. The sulfite is sodium sulfite, the sulfate is sodium sulfate, the thiosulfate is sodium thiosulfate, the polyol is alcohol containing two or more hydroxyl groups in the molecule, the alcohol is generally soluble in water, has strong dissolving capacity for polar substances, has small volatility, has viscous liquid or crystalline solid, and increases viscosity, boiling point and the like along with the increase of molecular weight.
As an embodiment of the invention, the mineralized material consists of the following substances in percentage by mass: 2-5% of sodium sulfate, 4-7% of sodium thiosulfate, 0-3% of sodium sulfite, 1-3% of maleic anhydride dimer acid triethanolamine ester, 1-3% of ethylene glycol and 79-92% of fly ash. In the implementation process, the raw material content is determined through experiments, and the comprehensive performance is improved through the synergistic effect.
In the embodiment, the sodium sulfate, the sodium thiosulfate, the sodium sulfite, the maleic anhydride dimer acid triethanolamine ester and the ethylene glycol all have the effect of promoting the early hydration of cement, can greatly improve the early hydration rate of cement particles, precipitate calcium, aluminum, iron and silicon ions from the cement particles in a liquid phase, promote a liquid phase water solution of the cement to form a saturated state in a short time, form more C-S-H calcium silicate and C-H gel, precipitate new more stable hydrated crystals from the saturated solution, continuously grow up along with the time, adhere to each other by virtue of various attractive forces to form a compact structure, and obtain more early strength of the cement paste. The specific gravity of the cement is increased by 3-32 microns, so that the cement is more powerful in hydration of cement particles, more cement stones are formed, and the strength of the cement is increased. The three compounds not only have the function of promoting the early hydration of cement, but also can promote the later hydration of the cement, are different from sodium sulfate and sodium chloride, have short time for promoting the hydration of the cement and have long persistence for the hydration of the cement, then the hydration of the cement is continuously carried out, new crystals are separated from the solution and calcium silicate hydrate gel is continuously filled in the space of the structure, and the strength of cement paste is continuously increased. The invention improves the cement performance, although the integral fineness of the cement is reduced, the cement particle grading presents a stepwise reasonable collocation, the coarse and fine cement particles are optimized, the water requirement for the standard thickening of the cement is reduced, and the compatibility of the cement, the concrete and the admixture thereof is improved.
In the implementation process, the three compounds of sodium thiosulfate, maleic anhydride dimer acid triethanolamine ester and ethylene glycol can also be wrapped on the surfaces of cement particles in the cement grinding process to form a protective film, so that static electricity among the cement particles is shielded, bonding and adsorption agglomeration among the cement particles are eliminated, the phenomenon of ball pasting and forging caused by the fact that the cement particles are bonded on a steel ball, a steel forging grinding body and a mill lining plate is avoided, the crushing capacity of steel ball forging is kept for a long time, the fineness of the cement particles is finer, and the fineness of the cement is thinned after the cement is blended and mineralized because the fineness of the cement is controlled to be fixed in the cement production process, so that the machine-hour yield of the mill can be improved.
In addition, the maleic anhydride dimer acid triethanolamine ester has the function of corrosion prevention, can form an oxidation protection film on the metal surface, retards the corrosion of reinforcing steel bars, increases the durability of concrete, improves the stability of concrete buildings and prolongs the service life of the concrete buildings.
As an embodiment of the invention, the mineralized material consists of the following substances in percentage by mass: 3-4% of sodium sulfate, 5-6% of sodium thiosulfate, 1-2% of sodium sulfite, 1.5-2.5% of maleic anhydride dimer acid triethanolamine ester, 1.5-2.5% of ethylene glycol and 83-88% of fly ash by further processing raw materials
As an embodiment of the invention, the mineralized material consists of the following substances in percentage by mass: 4% of sodium sulfate, 5% of sodium thiosulfate, 2% of sodium sulfite, 2% of maleic anhydride dimer acid triethanolamine ester, 2% of ethylene glycol and 85% of fly ash.
In one embodiment of the invention, the mineralized material is solid, the solid is powder, the color is gray at about 50 degrees, and the particle size of the powder is 45 microns, and the balance of the powder on a sieve is not more than 50%.
As an embodiment of the present invention, the present invention provides a method for preparing a mineralized material used in a cement grinding process, comprising the steps of:
(1) preparing raw materials of sodium sulfate, sodium thiosulfate, sodium sulfite, maleic anhydride dimer acid triethanolamine ester, ethylene glycol and fly ash;
(2) and (2) spraying the liquid raw materials in the step (1) on a mixer by using a liquid metering pump for metering, feeding the powder raw materials in a matched manner by using an automatic feeding system according to a proportion, wherein the feeding process comprises the following components in percentage by mass, 2-5% of sodium sulfate, 4-7% of sodium thiosulfate, 0-3% of sodium sulfite, 1-3% of maleic anhydride dimer acid triethanolamine ester, 1-3% of ethylene glycol and 79-92% of fly ash, and conveying the mixture to the mixer to be fully mixed with the liquid raw materials to obtain a cement mineralized material product.
As an embodiment of the invention, the addition amount of the mineralized material in the cement grinding process is 0.5 percent of the mass of the cement.
In the process of implementing cement grinding, large cement particles are subjected to the action of steel balls, and the specific surface area is increased along with the continuous reduction of the particle size, so that various physical and chemical properties of the cement can be qualitatively changed. The particles are reduced and simultaneously are the mechanochemical process of energy conversion, initially, under the action of grinding ball impact, the cohesive force of clinker particles is overcome, so that the crystal structure of the particles is damaged, the crystallization degree of the crystals is reduced, the defects are increased, crystal lattice dislocation and temperature rise are caused, the apparent density and the real density are changed immediately, and the surface energy of the particles is increased along with the continuous increase of the specific surface area. In the initial stage, clinker particles are changed from large particles into small particles along with the continuous grinding time, and the number of the particles is increased, so that the clinker particles gradually have powder performance. In the middle stage, also called the aggregation stage, the reduction of clinker particles and the grinding time are no longer in a linear relation like the initial stage, and the grinding speed is gradually reduced. Along with the grinding, the rate of the clinker particles thinning and the specific surface area increasing is slower and slower, and a large amount of charges with opposite electric properties generated when the crystals break exist on the surfaces of the ultrafine cement particles, and the particles are aggregated and agglomerated by virtue of electrostatic attraction. The later stage, also called agglomeration stage, is characterized in that the phenomenon that cement fine particles are agglomerated by the action of electrostatic attraction is gradually obvious in the later stage, the fineness of the cement is not refined continuously along with the continuation of grinding time, but the cement is thickened, and at the moment, under the impact force of a grinding ball, the ultrafine particles possibly have the recrystallization effect of crystals. At this stage, the grinding balance phenomenon occurs in the grinding process, namely, the coarse particles are ground under the action of mechanical force on one hand, and the ultrafine particles are reunited under the action of electrostatic attraction and external force on the other hand. In production, the grinding balance seriously restricts the further grinding of cement, influences the machine-hour output of the ball mill and increases the unit production energy consumption. The grinding aid solves the problem that the chloride ions of the grinding aid exceed the standard by adding the mineralized materials in the grinding process, improves the grinding effect, improves the comprehensive performance, improves the average machine-hour yield, obviously improves the specific gravity of the 3-32 micron cement particles, improves the 3-day compressive strength and the 28-day compressive strength, and saves energy consumption.
The invention has the technical scheme that the inventor utilizes theoretical reasoning and argumentation, and a large amount of scientific experiments create a cement admixture which has no damage to cement and concrete and can improve and optimize the performance of the cement and the concrete, so that the fineness of cement particles is reduced, the specific gravity of the particles of 3-32 micrometers is obviously improved, and the gradation of the cement particles is more reasonably optimized in the cement grinding process, thereby greatly improving the machine hour output of a cement grinding machine and saving the power consumption; the specific gravity of cement particles of 3-32 microns is promoted to be increased, so that the mechanical property of the cement is obviously improved, and the 3-day compressive strength and the 28-day compressive strength of the cement are obviously improved. Compared with the standard cement without cement and mineral materials, the cement grinding machine has the advantages that the machine hour yield of the cement grinding machine is improved by more than 20 percent, the 45-micron screen residue of the cement is reduced by 50 percent, the 3-day compressive strength of the cement is improved by about 8 MPa, and the 28-day compressive strength of the cement is improved by about 10 MPa. The technical scheme creatively further improves and optimizes the cement performance, is a revolution and leap of cement additives, improves the economic benefit and brings good social benefit. According to the technical scheme, the maleic anhydride dimer acid triethanolamine ester is added, so that on the basis of improving the early and later strength of the cement, the maleic anhydride dimer acid triethanolamine ester also has an anti-corrosion effect, a protective oxide film is formed on the surface of metal, the corrosion of steel bars in the concrete is retarded, the durability of the concrete is improved, the durability of the concrete and the stability of a concrete building are ensured, and the problem that the conventional cement powder grinding aid causes the corrosion of the steel bars is solved.
The following detailed description of the preferred embodiments of the present invention is provided to illustrate and explain the present invention and to limit the present invention.
The following examples are specific experiments conducted by the inventors of the present invention in accordance with the preparation method and the use method of the present invention.
In the following examples, the main raw materials and main reagents are commercially available.
Example 1
In this embodiment, a mineralized material used in a cement grinding process is obtained by the following preparation method, which includes the following steps: (1) preparing raw materials of sodium sulfate, sodium thiosulfate, sodium sulfite, maleic anhydride dimer acid triethanolamine ester, ethylene glycol and fly ash; (2) and (2) spraying the liquid raw materials in the step (1) on a mixer by using a liquid metering pump for metering, feeding the powder raw materials in a matched manner by using an automatic feeding system according to a certain proportion, wherein the feeding process comprises the following components in percentage by mass, 2% of sodium sulfate, 7% of sodium thiosulfate, 1% of sodium sulfite, 3% of maleic anhydride dimer acid triethanolamine ester, 2% of ethylene glycol and 85% of fly ash, conveying the mixture to the mixer, and fully mixing the mixture and the liquid raw materials together to obtain a cement mineralized material product, wherein the adding amount is 0.5% of the mass of the cement in the cement grinding process.
Example 2
In this embodiment, a mineralized material used in a cement grinding process is obtained by the following preparation method, which includes the following steps: (1) preparing raw materials of sodium sulfate, sodium thiosulfate, sodium sulfite, maleic anhydride dimer acid triethanolamine ester, ethylene glycol and fly ash; (2) and (2) spraying the liquid raw materials in the step (1) on a mixer by using a liquid metering pump for metering, feeding the powder raw materials in a matched manner by using an automatic feeding system according to a certain proportion, wherein the feeding process comprises the following components in percentage by mass, 3% of sodium sulfate, 7% of sodium thiosulfate, 2% of sodium sulfite, 2% of maleic anhydride dimer acid triethanolamine ester, 2% of ethylene glycol and 84% of fly ash, conveying the mixture to the mixer, and fully mixing the mixture and the liquid raw materials together to obtain a cement mineralized material product, wherein the adding amount is 0.5% of the mass of the cement in the cement grinding process.
Example 3
In this embodiment, a mineralized material used in a cement grinding process is obtained by the following preparation method, which includes the following steps: (1) preparing raw materials of sodium sulfate, sodium thiosulfate, sodium sulfite, maleic anhydride dimer acid triethanolamine ester, ethylene glycol and fly ash; (2) and (2) spraying the liquid raw materials in the step (1) on a mixer by using a liquid metering pump for metering, feeding the powder raw materials in a matched manner by using an automatic feeding system according to a certain proportion, wherein the feeding process comprises the following components in percentage by mass, 4% of sodium sulfate, 5% of sodium thiosulfate, 2% of sodium sulfite, 2% of maleic anhydride dimer acid triethanolamine ester, 2% of ethylene glycol and 85% of fly ash, conveying the mixture to the mixer, and fully mixing the mixture and the liquid raw materials together to obtain a cement mineralized material product, wherein the adding amount is 0.5% of the mass of the cement in the cement grinding process.
Example 4
In this embodiment, a mineralized material used in a cement grinding process is obtained by the following preparation method, which includes the following steps: (1) preparing raw materials of sodium sulfate, sodium thiosulfate, maleic anhydride dimer acid triethanolamine ester, ethylene glycol and fly ash; (2) and (2) spraying the liquid raw materials in the step (1) on a mixer by using a liquid metering pump for metering, feeding the powder raw materials in a matched manner by using an automatic feeding system according to a certain proportion, wherein the feeding process comprises the following steps of preparing 2% of sodium sulfate, 4% of sodium thiosulfate, 1% of maleic anhydride dimer acid triethanolamine ester, 1% of ethylene glycol and 92% of fly ash by mass, conveying the mixture to the mixer, and fully mixing the mixture and the liquid raw materials together to obtain a cement mineralized material product, wherein the adding amount is 0.5% of the mass of the cement in the cement grinding process.
Example 5
In this embodiment, a mineralized material used in a cement grinding process is obtained by the following preparation method, which includes the following steps: (1) preparing raw materials of sodium sulfate, sodium thiosulfate, sodium sulfite, maleic anhydride dimer acid triethanolamine ester, ethylene glycol and fly ash; (2) and (2) spraying the liquid raw materials in the step (1) on a mixer by using a liquid metering pump for metering, feeding the powder raw materials in a matched manner by using an automatic feeding system according to a certain proportion, wherein the feeding process comprises the following components in percentage by mass, 5% of sodium sulfate, 7% of sodium thiosulfate, 3% of sodium sulfite, 3% of maleic anhydride dimer acid triethanolamine ester, 3% of ethylene glycol and 79% of fly ash, conveying the mixture to the mixer, and fully mixing the mixture and the liquid raw materials together to obtain a cement mineralized material product, wherein the adding amount is 0.5% of the mass of the cement in the cement grinding process.
The results of the tests conducted on the mineral aggregates of the above examples 1 to 5 are shown in the following table.
TABLE 1
Example 6
The cement mineral aggregate product produced by adopting the technical scheme of the embodiment 3 is subjected to industrial tests of cement mineral aggregates in Shanxi Daojingwang group cloud in 12, 15 and 12 months 2020, the hourly output of a P.O42.5 standard blank sample cement mill is 140 tons/h, and after 2-hour washing and grinding, the average hourly output reaches 168 tons/h and is increased by 20%, the 80-micron sieve fineness tested by a laboratory is reduced from 1.70% to 0.85%, the specific gravity of 3-32-micron cement particles is increased from 58% to 65%, chloride ions are increased by 0.008% in cement, the national standard requirements of cement grinding aid GB/T26-2011 are met, the 3-day compressive strength is increased by 8.3 MPa, and the 28-day compressive strength is increased by 10.1 MPa.
Example 7
The cement mineralized material product produced by adopting the technical scheme of the embodiment 1 is subjected to a cement mineralized material industrial test in 16 days at 3 months in 2021 by a company Limited in North Yuan deer flying cement of Mongolian Baotou, a P.O42.5 standard blank sample cement mill has a hourly output of 45 tons/hour, and after 2-hour washing and grinding, the average hourly output reaches 55 tons/hour and is increased by 22.2 percent, the 80-micron surplus fineness is reduced to 0.78 percent by 1.60 percent through laboratory test, the specific gravity of 3-32-micron cement particles is increased to 63 percent by 56 percent, chloride ions are added in the cement by 0.01 percent, the national standard requirement of a cement grinding aid GB/T26-2011 is met, the 3-day compressive strength is increased by 8.2 MPa, and the 28-day compressive strength is increased by 10.3 MPa.
Example 8
The cement mineralized material product produced by adopting the technical scheme of the embodiment 2 is subjected to a cement mineralized material industrial test at 13 days 4.13.4.2021 by Hongwei cement limited company in Daisy Dynasty, the hourly output of a P.O42.5 standard blank sample cement mill is 160 tons/hour, after 2-hour washing and grinding, the average hourly output reaches 195 tons/hour, is increased by 21.9 percent, 11.80 percent of 45-micron screen fineness is reduced to 5.90 percent through laboratory test, the specific gravity of 3-32-micron cement particles is increased to 65 percent from 54 percent, chloride ions are increased by 0.009 percent in cement, the national standard requirement of a cement grinding aid GB/T26-2011 is met, the 3-day compressive strength is increased by 8.3 MPa, and the 28-day compressive strength is increased by 10.2 MPa.
Through a plurality of tests and by combining with practical application conditions, the mineralized material comprises the following substances in percentage by mass: 4% of sodium sulfate, 5% of sodium thiosulfate, 2% of sodium sulfite, 2% of maleic anhydride dimer acid triethanolamine ester, 2% of ethylene glycol and 85% of fly ash are optimal schemes.
(1) A mineralized material used in a cement grinding process is composed of the following substances in percentage by mass: 2-5% of sodium sulfate, 4-7% of sodium thiosulfate, 0-3% of sodium sulfite, 1-3% of maleic anhydride dimer acid triethanolamine ester, 1-3% of ethylene glycol and 79-92% of fly ash, and is an additive directly applied to a grinding process in cement production. The sodium sulfate, the sodium thiosulfate, the sodium sulfite, the maleic anhydride dimer acid triethanolamine ester and the ethylene glycol have the effect of promoting the early hydration of the cement, so that the early hydration rate of cement particles can be greatly improved, and the early strength is improved; the sodium thiosulfate, the maleic anhydride dimer acid triethanolamine ester and the ethylene glycol can be wrapped on the surfaces of cement particles to form a protective film in the cement grinding process, so that static electricity among the cement particles is shielded, adhesion and adsorption agglomeration among the cement particles are eliminated, the later hydration effect of the cement can be promoted, the persistence of cement hydration is improved, new crystals and hydrated calcium silicate gel are precipitated from a solution and are continuously filled in a space of a structure along with the continuous progress of cement hydration, the strength of a cement slurry is continuously increased, the maleic anhydride dimer acid triethanolamine ester also has an anti-corrosion effect, an oxidation protective film can be formed on the surface of metal, steel bars are rusted, and the service life is prolonged.
(2) A preparation method of mineralized materials used in the cement grinding process is prepared from the following substances in percentage by mass: 2-5% of sodium sulfate, 4-7% of sodium thiosulfate, 0-3% of sodium sulfite, 1-3% of maleic anhydride dimer acid triethanolamine ester, 1-3% of ethylene glycol and 79-92% of fly ash, wherein the liquid raw materials are sprayed on a mixer by adopting a liquid metering pump for metering, and the powder raw materials are matched by an automatic feeding system according to the proportion and then are conveyed to the mixer to be fully mixed with the liquid raw materials, so that the cement mineralized material product is obtained. The product is in the form of gray powder. The adding amount is 0.5 percent of the mass of the cement in the cement grinding process. The cement mill yield per machine hour can be improved by more than 20 percent by using the invention, the cement screen residue of 45 microns is reduced by 50 percent, the compressive strength of the cement is improved by about 8 MPa in 3 days, and the compressive strength is improved by about 10 MPa in 28 days. By reasonably adding other substances, the invention improves the output per machine hour of the mill, obviously improves the early and later strength of the product, increases the cement grinding efficiency, reduces the power consumption of the cement grinding and avoids the danger of the chlorine ion superscript to the cement concrete and the buildings and personnel thereof.
The technical principle of the invention is as follows: the invention provides a mineralized material used in the cement grinding process, wherein sodium sulfate, sodium thiosulfate, sodium sulfite, maleic anhydride dimer acid triethanolamine ester and ethylene glycol all have the effect of promoting early hydration of cement, the early hydration rate of cement particles can be greatly improved, calcium, aluminum, iron and silicon ions are separated out from the cement particles in a liquid phase, a cement liquid phase aqueous solution is promoted to form a saturated state in a short time, more C-S-H calcium silicate and C-H gel are formed, new, more stable and more hydrated crystals are separated out from the saturated solution, the crystals are continuously grown along with the passage of time, the crystals are bonded together to form a compact structure by virtue of various attractive forces, and the cement paste can obtain more early strength.
Meanwhile, the sodium thiosulfate, the maleic anhydride dimer acid triethanolamine ester and the ethylene glycol can also wrap the surfaces of cement particles in the cement grinding process to form a protective film, so that static electricity among the cement particles is shielded, bonding and adsorption agglomeration among the cement particles are eliminated, the phenomenon of ball pasting and forging caused by the fact that the cement particles are bonded on a steel ball, a steel forging grinding body and a mill lining plate is avoided, the breaking capacity of steel ball and steel forging is kept for a long time, the fineness of the cement particles is finer, and the fineness of the cement is thinned after the cement is blended and mineralized because the fineness control of the cement is fixed in the cement production process, so that the machine-hour yield of the mill can be improved; the specific gravity of the cement is increased by 3-32 microns, so that the cement is more powerful in hydration of cement particles, more cement stones are formed, and the strength of the cement is improved. The three compounds not only have the function of promoting the early hydration of cement, but also can promote the later hydration of the cement, are different from sodium sulfate and sodium chloride, have short time for promoting the hydration of the cement and have long persistence for the hydration of the cement, then the hydration of the cement is continuously carried out, new crystals are separated from the solution and calcium silicate hydrate gel is continuously filled in the space of the structure, and the strength of cement paste is continuously increased.
The maleic anhydride dimer acid triethanolamine ester also has the function of corrosion prevention, can form an oxidation protection film on the surface of metal, retards the corrosion of reinforcing steel bars, increases the durability of concrete, improves the stability of concrete buildings and prolongs the service life of the concrete buildings.
The invention has the technical effects that: compared with the cement powder grinding aid in the current market, the cement mineralized material product manufactured by the technical scheme of the invention has the following advantages and positive effects:
1. the invention has the advantages that the chloride ions do not exceed the standard and do not form danger to cement concrete, buildings and personnel. The invention does not add NaCI, the chloride ion is not beyond the standard, avoid a large amount of chloride ions from being brought into the cement, seriously affect the performance of the cement, cause the corrosion effect on the steel bar, improve the durability and the safety of the concrete building, simultaneously, the maleic anhydride dimer acid triethanolamine ester is added in the invention, an oxidation protective film can be formed on the metal surface, the corrosion of the steel bar is retarded, the durability of the concrete is increased, the safety of the concrete building is improved, and the service life of the concrete building is prolonged.
2. The invention improves the machine hour output of the mill, increases the cement grinding efficiency and reduces the power consumption of cement grinding. The sodium sulfite, the maleic anhydride dimer acid triethanolamine ester and the ethylene glycol can also wrap the surfaces of cement particles to form a protective film in the cement grinding process, so that static electricity among the cement particles is shielded, bonding and adsorption agglomeration among the cement particles are eliminated, the crushing capacity of steel ball forging is kept for a long time, the fineness of the cement particles is finer, and the machine-hour yield of a grinding machine is improved. The industrial test proves that the cement mineralized material can improve the machine hour output of the cement mill by more than 20 percent and save the electric energy by about 7 kilowatt-hour/ton.
3. The invention can improve the compression strength of cement, improve the performance of cement, save the production cost of cement and improve the economic benefit and social benefit. The sodium sulfate, the sodium thiosulfate, the sodium sulfite, the maleic anhydride dimer acid triethanolamine ester and the ethylene glycol have the effect of promoting the early hydration of cement, and can greatly improve the early hydration rate of cement particles, and the three compounds of the sodium thiosulfate, the maleic anhydride dimer acid triethanolamine ester and the ethylene glycol have the effect of promoting the early hydration of the cement, promoting the later hydration of the cement, having long persistence on the hydration of the cement, and continuously increasing the strength of cement paste. After industrial tests and laboratory tests, the compressive strength of the cement mineralized material product produced by adopting the technical scheme is improved by about 8 MPa in 3 days and about 10 MPa in 28 days after the cement mineralized material product is applied to industrial production. Can reduce the clinker consumption by more than 10 percent and increase the mixed material by more than 10 percent, the price difference between the clinker and the mixed material is about 200 yuan/ton, 200 yuan/ton is 10 percent to 20 yuan/ton, and water is deductedThe cost of the sludge mineralization is low, and the cement per ton has the benefit of 10 yuan. The use amount of coal and CO can be reduced by using less 10 percent of cement clinker2、SO2、NOxAnd (4) discharging, and laying a foundation for binding and compacting for realizing the carbon peak reaching and carbon neutralization ambitious planning targets.
4. The invention improves and optimizes the cement performance, reduces the water demand for thickening the cement, and improves the compatibility of the cement, the concrete and the additive thereof. After the cement mineralized material product produced by the technical scheme of the invention is applied to industrial production, as the cement particle composition is more reasonable in the cement grinding process, although the integral fineness of the cement is reduced, the cement particle composition is in stepwise reasonable arrangement, the coarse and fine cement particles are optimized, and the water demand for the cement thickening is not increased, but is reduced. The reduction of the water requirement for the standard thickening of the cement improves the compatibility of the cement, the concrete and additives thereof, and improves and optimizes the cement performance.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A mineralized material for cement grinding process is characterized in that: the mineralized material at least comprises: sulfate, thiosulfate, maleic anhydride dimer acid triethanolamine ester, polyol and fly ash; the sulfate is selected from one or more of sodium sulfate, potassium sulfate and magnesium sulfate; the thiosulfate is selected from one or more of sodium thiosulfate, potassium thiosulfate and ammonium thiosulfate; the polyalcohol is one or more selected from ethylene glycol, 1, 4-butanediol, 1, 6-hexanediol and glycerol.
2. The mineralized material for cement grinding process according to claim 1, wherein: the mineralized material also comprises sulfite which is selected from one or more of sodium sulfite, potassium sulfite and ammonium sulfite.
3. A mineralized material for use in cement grinding processes according to claim 1 or 2, characterized in that: the mineralized material comprises the following substances in percentage by mass: 2-5% of sodium sulfate, 4-7% of sodium thiosulfate, 0-3% of sodium sulfite, 1-3% of maleic anhydride dimer acid triethanolamine ester, 1-3% of ethylene glycol and 79-92% of fly ash.
4. The mineralized material for cement grinding process according to claim 3, wherein: the mineralized material comprises the following substances in percentage by mass: 3-4% of sodium sulfate, 5-6% of sodium thiosulfate, 1-2% of sodium sulfite, 1.5-2.5% of maleic anhydride dimer acid triethanolamine ester, 1.5-2.5% of ethylene glycol and 83-88% of fly ash.
5. The mineralized material for cement grinding process according to claim 4, wherein: the mineralized material comprises the following substances in percentage by mass: 4% of sodium sulfate, 5% of sodium thiosulfate, 2% of sodium sulfite, 2% of maleic anhydride dimer acid triethanolamine ester, 2% of ethylene glycol and 85% of fly ash.
6. The mineralized material for cement grinding process according to claim 1, wherein: the mineralized material is solid, the solid is in a powder shape, and the balance of a sieve with 45-micron particle size of the powder is not more than 50%.
7. The method for preparing the mineralized material used in the cement grinding process according to claim 2, wherein the method comprises the following steps: the method comprises the following steps:
(1) preparing raw materials of sodium sulfate, sodium thiosulfate, sodium sulfite, maleic anhydride dimer acid triethanolamine ester, ethylene glycol and fly ash;
(2) and (2) spraying the liquid raw materials in the step (1) on a mixer by using a liquid metering pump for metering, feeding the powder raw materials in a matched manner by using an automatic feeding system according to a proportion, wherein the feeding process comprises the following components in percentage by mass, 2-5% of sodium sulfate, 4-7% of sodium thiosulfate, 0-3% of sodium sulfite, 1-3% of maleic anhydride dimer acid triethanolamine ester, 1-3% of ethylene glycol and 79-92% of fly ash, and conveying the mixture to the mixer to be fully mixed with the liquid raw materials to obtain a cement mineralized material product.
8. The mineralized material for use in a cement grinding process according to any one of claims 1 to 7, wherein: the addition amount of the mineralized materials in the cement grinding process is 0.5 percent of the mass of the cement.
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Inventor after: Guo Jianhua Inventor after: Li Naiyuan Inventor before: Guo Jianhua Inventor before: Li Ruan |
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Application publication date: 20210921 |