CN115010395A - Grinding aid for increasing cement yield and method for increasing cement yield - Google Patents
Grinding aid for increasing cement yield and method for increasing cement yield Download PDFInfo
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- CN115010395A CN115010395A CN202210707916.5A CN202210707916A CN115010395A CN 115010395 A CN115010395 A CN 115010395A CN 202210707916 A CN202210707916 A CN 202210707916A CN 115010395 A CN115010395 A CN 115010395A
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- 238000000227 grinding Methods 0.000 title claims abstract description 176
- 239000004568 cement Substances 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 19
- -1 alcohol amine compound Chemical class 0.000 claims abstract description 69
- 235000013379 molasses Nutrition 0.000 claims abstract description 68
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 61
- 150000001875 compounds Chemical class 0.000 claims abstract description 60
- 238000002156 mixing Methods 0.000 claims abstract description 40
- 229920005862 polyol Polymers 0.000 claims abstract description 31
- 238000003756 stirring Methods 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 15
- 238000005303 weighing Methods 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 34
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 15
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 15
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 15
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims description 10
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 10
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 6
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- 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 claims description 5
- 239000001110 calcium chloride Substances 0.000 claims description 5
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 5
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- 239000004317 sodium nitrate Substances 0.000 claims description 5
- 235000010344 sodium nitrate Nutrition 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 150000005846 sugar alcohols Polymers 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 3
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N propylene glycol Substances CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 235000010265 sodium sulphite Nutrition 0.000 claims description 3
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 description 3
- 229940043276 diisopropanolamine Drugs 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012496 blank sample Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000003921 particle size analysis Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000008719 thickening 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
- C04B7/421—Inorganic materials
- C04B7/425—Acids or salts thereof
-
- 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
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
- C04B7/428—Organic materials
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/52—Grinding aids; Additives added during grinding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses a grinding aid for improving cement yield and a method for improving cement yield, wherein the grinding aid is prepared from the following raw materials in parts by weight: 10-80 parts of alcohol amine compound, 10-50 parts of polyol compound, 5-20 parts of inorganic salt compound and 5-20 parts of molasses; the preparation process of the grinding aid comprises the following steps: weighing the alcohol amine compound, the polyol compound, the inorganic salt compound and the molasses according to the parts by weight, then uniformly mixing and stirring the molasses and the inorganic salt compound, and then sequentially adding the alcohol amine compound and the polyol compound into the mixture for mixing and stirring; and discloses a method for improving the cement yield, in the cement grinding production, a finished grinding aid is mixed into a cement grinding head of a ball mill through a centrifugal pump, then the flow of the grinding aid is adjusted according to 0.02-0.1% of the cement production, and the grinding aid and a cement raw material are fed into the ball mill together for grinding to obtain a cement finished product. The invention can optimize the cement particle grading, effectively reduce the phenomenon of superfine powder over-grinding and improve the grinding efficiency.
Description
Technical Field
The invention relates to the technical field of cement production, in particular to a grinding aid for increasing cement yield and a method for increasing cement yield.
Background
In order to reduce carbon dioxide emission, measures of 'electricity and coal limitation' are taken to a certain degree all over the country, under the current resource shortage environment, how to improve the machine hour yield of cement on the premise of not increasing energy consumption, create greater profits for enterprises and become the development trend of the cement industry in the future, and at present, the method for improving the yield of cement is mainly technically improved from the aspect of production technology, and comprises the steps of replacing a larger mill, improving the load of the mill, controlling the specific surface area of milled cement and the like. The cement yield is improved by optimizing the production process and replacing production equipment, the required cost is high, and certain potential safety hazards are brought. In view of the addition of additives, grinding aids can be added in the cement powder production process to reduce the phenomenon of over-grinding of fine powder, so that the cement yield is improved, the particle grading is optimized, the grinding efficiency is improved, and the power consumption of a grinding machine is reduced.
Disclosure of Invention
The invention aims to provide a grinding aid for improving cement yield and a method for improving cement yield. In order to achieve the above object, the present invention adopts the following technical effects:
according to one aspect of the invention, the grinding aid for improving the cement yield is prepared from the following raw materials in parts by weight: 10-80 parts of alcohol amine compound, 10-50 parts of polyol compound, 5-20 parts of inorganic salt compound and 5-20 parts of molasses; the preparation process of the grinding aid comprises the following steps: weighing the alcohol amine compound, the polyol compound, the inorganic salt compound and the molasses according to the parts by weight, then uniformly mixing and stirring the molasses and the inorganic salt compound, sequentially adding the alcohol amine compound and the polyol compound into the mixture, mixing and stirring for 1-3 h, standing for 1-2 h, and then putting into a grinding aid finished product tank for storage to obtain a grinding aid finished product.
Further preferably in the above scheme, the alcohol amine compound comprises one or more of diethanolamine, triethanolamine, diethanol monoisopropanolamine, monoethanoldiisopropanolamine, triisopropanolamine and polyalcohol amine; the polyol compound comprises one or more of ethylene glycol, diethylene glycol, 2-propylene glycol, glycerol and pentaerythritol; the inorganic salt compound comprises one or more of sodium chloride, calcium chloride, aluminum chloride, sodium sulfate, aluminum sulfate, sodium sulfite, sodium nitrate, calcium nitrate and sodium thiocyanate.
The above aspect is further preferred, wherein the brix of the molasses is greater than 80%.
In a further preferred embodiment of the above process, the mixing of molasses with inorganic salt compound comprises the following steps: weighing molasses and part of inorganic salt compounds according to a ratio of 2-4: 1, uniformly mixing water with the weight of 1-2 times of that of the molasses and part of the inorganic salt compounds to obtain inorganic salt compound mixed liquor, taking the molasses and carrying out centrifugal filtration, then taking hydrogen peroxide with the volume of 0.2-0.3 times of that of the molasses and mixing the hydrogen peroxide with the filtered molasses, then adding the mixture into the inorganic salt compound mixed liquor for mixing and stirring, and then storing for 30-60 min.
The proposal is further preferable that the inorganic salt compound is added into the inorganic salt compound mixed solution and mixed and stirred for more than 30min at the temperature of 10-20 ℃, wherein the stirring speed is not less than 2000 rps.
The scheme is further preferable, 0.2-0.3 time of hydrogen peroxide by volume is mixed with the molasses and then placed into a high-pressure reaction kettle with the pressure of 0.05MPa to 0.08MPa to fully react at the temperature of 60-75 ℃, and the concentration of the hydrogen peroxide is 25-30%.
According to another aspect of the invention, the invention provides a method for improving cement yield by using a grinding aid of improving cement yield, in the cement grinding production, a finished grinding aid is doped into a cement grinding head of a ball mill by a centrifugal pump, then the flow of the grinding aid is adjusted according to 0.02-0.1% of the cement yield, and the grinding aid and a cement raw material are fed into the ball mill together for grinding to obtain a cement finished product.
Preferably, the grinding aid and the cement raw material are put into a ball mill together for grinding into powder with a Brinell ratio of 320- 2 Per kg of fine powder.
Further preferably, the grinding temperature is not more than 120 ℃.
In summary, the invention adopts the above technical scheme, and the invention has the following technical effects:
the invention mainly utilizes the hydroxyl on the surface of the alcohol amine to be adsorbed on cement particles, reduces the electrostatic adsorption among the cement particles, and prevents the over-grinding phenomenon of the cement, thereby achieving the effect of grinding aid. Because the alcamine grinding aid is influenced by steric hindrance of a molecular structure, a lot of space is still left and cannot be completely utilized after the alcamine grinding aid is adsorbed on the surface of cement particles, although the alcohol amine is added in the traditional cement production, the production is improved to a certain degree, the in-grinding flow velocity is too high due to the addition of more alcohol amine, the appearance of the cement particles is influenced, and the flushing is caused if the grinding aid containing too much alcohol amine is added in front of a roller press, so that the cement production and the cement quality are not facilitated; the polyhydric alcohol is a large class of alcohol containing two or more hydroxyl groups in the molecule, can be easily adsorbed on the surface of cement particles, and the small molecular polyhydric alcohol is used for filling the space after the alcohol amine adsorbs the cement, so that the grindability of the cement can be further improved, and the yield of the cement is improved;
according to the invention, the yield-increasing grinding aid is added in the cement grinding process, so that the phenomenon of over-grinding of fine powder can be effectively reduced, and meanwhile, fine powder particles are preferentially selected in the grinding process, so that the grinding efficiency can be improved, thereby improving the cement yield, and improving the uniformity coefficient of cement, which indicates that the yield-increasing grinding aid can optimize the grading of cement particles.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to preferred embodiments. However, it should be noted that the numerous details set forth in the description are merely intended to provide a thorough understanding of one or more aspects of the present invention, even though such aspects of the invention may be practiced without these specific details.
The first embodiment is as follows: according to the grinding aid for improving the cement yield, the grinding aid is prepared from the following raw materials in parts by weight: 80 parts of alcohol amine compound, 10 parts of polyol compound, 5 parts of inorganic salt compound and 5 parts of molasses, wherein the brix of the molasses is 87%; the preparation process of the grinding aid comprises the following steps: weighing an alcohol amine compound, a polyol compound, an inorganic salt compound and molasses according to parts by weight, then uniformly mixing and stirring the molasses and the inorganic salt compound, sequentially adding the alcohol amine compound and the polyol compound into the mixture, mixing and stirring for 1h, standing for 1h, and then putting into a grinding aid finished product tank for storage for 3 days to obtain a grinding aid finished product, wherein the alcohol amine compound is one of diethanolamine, triethanolamine, diethanol monoisopropanolamine and monoethanol diisopropanolamine; the polyol compound comprises one of ethylene glycol, diethylene glycol and glycerol; the inorganic salt compound is one of sodium chloride, calcium chloride, aluminum sulfate, sodium nitrate and calcium nitrate.
In an embodiment of the invention, mixing molasses with an inorganic salt compound comprises the steps of: weighing molasses and part of inorganic salt compound according to the weight ratio of 2:1, uniformly mixing water with the weight of 1 time of that of the molasses and part of the inorganic salt compound to obtain inorganic salt compound mixed liquor, taking the molasses and carrying out centrifugal filtration, taking hydrogen peroxide with the volume of 0.2 time of that of the molasses and mixing the hydrogen peroxide with the filtered molasses, putting the mixture into a high-pressure reaction kettle with the pressure of 0.05MPa, carrying out full reaction at the temperature of 60, taking out the mixture, adding the mixture into the inorganic salt compound mixed liquor, mixing and stirring the mixture for 30min at the temperature of 10 ℃, and then storing the mixture for 30 min; wherein the stirring speed is not less than 2000rps, and the concentration of the hydrogen peroxide is 25%.
Example two: according to the grinding aid for improving the cement yield, the grinding aid is prepared from the following raw materials in parts by weight: 10 parts of alcohol amine compound, 50 parts of polyol compound, 20 parts of inorganic salt compound and 20 parts of molasses, wherein the brix of the molasses is 82%; the preparation process of the grinding aid comprises the following steps: weighing an alcohol amine compound, a polyol compound, an inorganic salt compound and molasses according to parts by weight, then uniformly mixing and stirring the molasses and the inorganic salt compound, sequentially adding the alcohol amine compound and the polyol compound into the mixture, mixing and stirring for 3 hours, standing for 2 hours, and then putting into a grinding aid finished product tank for storage for 15 days to obtain a grinding aid finished product, wherein the alcohol amine compound is one of diethanolamine, triethanolamine, diethanol monoisopropanolamine and monoethanol diisopropanolamine; the polyol compound comprises one of ethylene glycol, diethylene glycol and glycerol; the inorganic salt compound is one of sodium chloride, calcium chloride, aluminum sulfate, sodium nitrate and calcium nitrate.
In an embodiment of the invention, mixing molasses with an inorganic salt compound comprises the following steps: weighing molasses and part of inorganic salt compound according to a mass ratio of 4:1, uniformly mixing water 2 times the weight of the molasses with part of the inorganic salt compound to obtain inorganic salt compound mixed liquor, taking the molasses and carrying out centrifugal filtration, taking hydrogen peroxide 0.3 times the volume of the molasses and mixing the hydrogen peroxide with the filtered molasses, then putting the mixture into a 0.08MPa high-pressure reaction kettle, carrying out full reaction at a temperature of 75 ℃, taking out the mixture, adding the mixture into the inorganic salt compound mixed liquor, mixing and stirring the mixture for 30min at a temperature of 20 ℃, and then storing the mixture for 60 min; wherein the stirring speed is not less than 2000rps, and the concentration of the hydrogen peroxide is 30%.
Example three: according to the grinding aid for improving the cement yield, the grinding aid is prepared from the following raw materials in parts by weight: 60 parts of alcohol amine compound, 30 parts of polyol compound, 15 parts of inorganic salt compound and 12 parts of molasses, wherein the brix of the molasses is 85%; the preparation process of the grinding aid comprises the following steps: weighing an alcohol amine compound, a polyol compound, an inorganic salt compound and molasses according to parts by weight, then uniformly mixing and stirring the molasses and the inorganic salt compound, sequentially adding the alcohol amine compound and the polyol compound into the mixture, mixing and stirring for 2 hours, standing for 1.5 hours, and then putting into a grinding aid finished product tank for storage for 7 days to obtain a grinding aid finished product, wherein the alcohol amine compound is one of diethanolamine, triethanolamine, diethanol monoisopropanolamine and monoethanol diisopropanolamine; the polyol compound comprises one of ethylene glycol, diethylene glycol and glycerol; the inorganic salt compound is one of sodium chloride, calcium chloride, aluminum sulfate, sodium nitrate and calcium nitrate.
In an embodiment of the invention, mixing molasses with an inorganic salt compound comprises the steps of: weighing molasses and part of inorganic salt compound according to the mass ratio of 3:1, uniformly mixing water with the weight of 1.5 times of that of the molasses with the part of the inorganic salt compound to obtain inorganic salt compound mixed liquor, taking the molasses and carrying out centrifugal filtration, taking hydrogen peroxide with the volume of 0.25 time of that of the molasses and mixing the hydrogen peroxide with the filtered molasses, then putting the mixture into a high-pressure reaction kettle with the pressure of 0.06MPa, carrying out full reaction at the temperature of 65-70 ℃, taking out the mixture, adding the mixture into the inorganic salt compound mixed liquor, mixing and stirring the mixture for 30min at the temperature of 15 ℃, and then storing the mixture for 45 min; wherein the stirring speed is not less than 2000rps, and the concentration of the hydrogen peroxide is 27%; after the molasses is centrifugally filtered, impurities in the molasses can be reduced, the viscosity of mineral aggregate is reduced, and the dispersion of particles is promoted, so that the flowability of an inorganic salt compound is improved, the viscosity of the molasses on inorganic combination is reduced, a radical energy group in molasses dispersion liquid is better modified, the dispersion of the molasses is improved, the adsorption of inorganic salt particles is facilitated, the fineness and the specific surface area of cement can be obviously reduced, and the machine-hour yield of a cement mill is effectively improved.
Example four: according to the grinding aid for improving the cement yield, the grinding aid is prepared from the following raw materials in parts by weight: 70 parts of alcohol amine compound, 50 parts of polyol compound, 20 parts of inorganic salt compound and 16 parts of molasses, wherein the brix of the molasses is 85%; the preparation process of the grinding aid comprises the following steps: weighing an alcohol amine compound, a polyol compound, an inorganic salt compound and molasses according to parts by weight, then uniformly mixing and stirring the molasses and the inorganic salt compound, then storing for 50min, wherein the stirring speed is not less than 1200rps, then sequentially adding the alcohol amine compound and the polyol compound into the mixture, mixing and stirring for 1.5h, wherein the stirring speed is not less than 2000rps, standing for 1.5h, and then placing into a grinding aid finished product tank for storing for 8 days to obtain a grinding aid finished product, wherein the alcohol amine compound is polymeric alcohol amine; the polyol compound is pentaerythritol; the inorganic salt compound is sodium sulfate or sodium thiocyanate.
Example five: according to the grinding aid for improving the cement yield, the grinding aid is prepared from the following raw materials in parts by weight: 50 parts of alcohol amine compound, 40 parts of polyol compound, 18 parts of inorganic salt compound and 10 parts of molasses, wherein the brix of the molasses is 82%; the preparation process of the grinding aid comprises the following steps: weighing an alcohol amine compound, a polyol compound, an inorganic salt compound and molasses according to parts by weight, then uniformly mixing and stirring the molasses and the inorganic salt compound, then storing for 40min, wherein the stirring speed is not less than 1000rps, then sequentially adding the alcohol amine compound and the polyol compound into the mixture, mixing and stirring for 2h, wherein the stirring speed is not less than 2000rps, standing for 1.5h, and then placing into a grinding aid finished product tank for storing for 5 days to obtain a grinding aid finished product, wherein the alcohol amine compound is triisopropanolamine; the polyol compound is 2-propylene glycol; the inorganic salt compound is aluminum chloride or sodium sulfite.
Example six: in the embodiment of the invention, the method for improving the cement yield of the grinding aid prepared by the invention mainly comprises the following steps of doping a finished grinding aid product into a cement grinding head of a ball mill through a centrifugal pump in the cement grinding production, then adjusting the flow of the grinding aid according to 0.02% of the cement yield, and feeding the grinding aid and a cement raw material into the ball mill together for grinding into a grinding aid with a Brinell's ratio of 362m 2 The grinding aid is the grinding aid prepared in example 1, and the grinding temperature is not more than 110 ℃, so that a cement finished product is obtained. Compared with the traditional grinding aid added into cement for grinding, the grinding aid has better effect of improving yield, can not cause the problems of over-high flow speed in the grinding mill, material flushing and the like, and can not increase the energy consumptionThe machine-hour yield of cement is improved, and a larger profit value is created for enterprises.
Example seven: in the embodiment of the invention, the method for improving the cement yield of the grinding aid prepared by the invention mainly comprises the following steps of doping a finished grinding aid product into a cement grinding head of a ball mill through a centrifugal pump in the cement grinding production, then adjusting the flow of the grinding aid according to 0.1% of the cement yield, and feeding the grinding aid and a cement raw material into the ball mill together for grinding into a powder with a Brinell's ratio of 380m 2 The grinding aid is the grinding aid prepared in example 2, and the grinding temperature is not more than 100 ℃, so that a cement finished product is obtained.
Example eight: in the embodiment of the invention, the method for improving the cement yield by using the grinding aid for improving the cement yield mainly comprises the following steps of doping a finished grinding aid into a cement grinding head of a ball mill by using a centrifugal pump in the cement grinding production, then adjusting the flow of the grinding aid according to 0.05% of the cement yield, and feeding the grinding aid and a cement raw material into the ball mill together for grinding into powder with a Brinell's ratio table of 351m 2 And/kg of fine powder, wherein the grinding aid prepared in the third embodiment or the fourth embodiment is used as the grinding aid, and the grinding temperature is not more than 120 ℃, so that a cement finished product is obtained.
Example nine: in the embodiment of the invention, the method for improving the cement yield by using the grinding aid for improving the cement yield mainly comprises the following steps of doping a finished grinding aid into a cement grinding head of a ball mill by using a centrifugal pump in the cement grinding production, then adjusting the flow of the grinding aid according to 0.02% of the cement yield, and feeding the grinding aid and a cement raw material into the ball mill together for grinding into the grinding aid with the Brinell ratio of 320m 2 And/kg of fine powder, wherein the grinding aid prepared in the fifth embodiment is used as the grinding aid, and the grinding temperature is not more than 110 ℃, so that a cement finished product is obtained.
Example ten: in the embodiment of the invention, the grinding aid for improving the cement yield prepared by the invention is used for improving the cement yieldThe method mainly comprises the following steps of mixing a finished grinding aid product into a cement grinding head of a ball mill by a centrifugal pump in the cement grinding production, then adjusting the flow of the grinding aid according to 0.07 percent of the production capacity of cement, and feeding the grinding aid and a cement raw material into the ball mill together for grinding into powder with a Brinell ratio table of 370m 2 The grinding aid is the grinding aid prepared in the fourth or fifth embodiment, the grinding temperature is 120 ℃, and a cement finished product is obtained
The invention utilizes a small-grinding experiment to simulate the actual production of cement, clinker, gypsum, coal gangue, coal-fired furnace slag and fly ash of the company H are added into a small-sized ball mill according to the proportion of P.O cement actually produced to prepare 5kg of cement sample, and the grinding time is controlled so that the Bosch ratio is 320-380m 2 In the time of/kg, the mixing amount of the grinding aid is 0.02 to 0.1 percent; carrying out complete physical examination analysis on different milled cement samples, and comparing the change of the cement residue after being mixed with different grinding aids and having a sieve size of 45 mu m to judge the effect of the grinding aids on improving the grinding efficiency of the cement, thereby judging the yield improvement effect in the actual production, as shown in Table 1; when company H carries out an industrial large grinding test for 16H, a phi 4200mm x 13000mm type ball mill is adopted to verify the yield improvement effect of the grinding aid, as shown in Table 2, and the effect of the grinding aid is analyzed by comparing the particle size distribution of cement samples before and after the grinding aid is doped by carrying out a laser particle size analysis test on the cement samples before and after the large grinding test, as shown in Table 3.
Table 1: quality data of small grinding experiment of yield-increasing type grinding aid
Table 2: grinding aid large grinding experiment for increasing yield of company H
Table 3: effect of yield-enhancing grinding aid on cement particle size distribution
As can be seen from Table 1, in a small grinding experiment, after the yield-increasing grinding aid is doped, the screen residue of 45 micrometers is reduced by about 4.8 percent compared with that of a blank sample, and is reduced by about 1.4 percent compared with that of a grinding aid, the compressive strength is obviously improved in 3d and 28d, and the difference of other quality data is small; in Table 2, the yield of the large grinding production test bed carried out by the company H is improved by 11t/H compared with that of the grinding aid, and the power consumption is not greatly different. Compared with quality data such as standard thickening, setting time and the like, the quality data is not changed much, which shows that the cement quality is not affected badly after the yield-increasing grinding aid is doped, and the 3d compressive strength and the 28d compressive strength are both improved. As can be seen from Table 3, the fine powder is reduced after the yield-improved grinding aid is doped, the average particles of cement distributed at 3-32 mu m are increased, and the uniformity coefficient is improved, which shows that the yield-improved grinding aid can optimize the gradation of cement particles.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (9)
1. The grinding aid for improving the cement yield is characterized in that: the grinding aid is prepared from the following raw materials in parts by weight: 10-80 parts of alcohol amine compound, 10-50 parts of polyol compound, 5-20 parts of inorganic salt compound and 5-20 parts of molasses; the preparation process of the grinding aid comprises the following steps: weighing the alcohol amine compound, the polyol compound, the inorganic salt compound and the molasses according to the parts by weight, then uniformly mixing and stirring the molasses and the inorganic salt compound, sequentially adding the alcohol amine compound and the polyol compound into the mixture, mixing and stirring for 1-3 h, standing for 1-2 h, and then putting into a grinding aid finished product tank for storage to obtain a grinding aid finished product.
2. The grinding aid for improving cement yield according to claim 1, wherein the grinding aid is characterized in that: the alcohol amine compound comprises one or more of diethanolamine, triethanolamine, diethanol monoisopropanolamine, monoethanoldiisopropanolamine, triisopropanolamine and polyalcohol amine; the polyol compound comprises one or more of ethylene glycol, diethylene glycol, 2-propylene glycol, glycerol and pentaerythritol; the inorganic salt compound comprises one or more of sodium chloride, calcium chloride, aluminum chloride, sodium sulfate, aluminum sulfate, sodium sulfite, sodium nitrate, calcium nitrate and sodium thiocyanate.
3. The grinding aid for improving cement yield according to claim 1, wherein the grinding aid is characterized in that: the brix of the molasses is greater than 80%.
4. The grinding aid for improving cement yield according to claim 1, wherein the grinding aid is characterized in that: the mixing of molasses with inorganic salt compound comprises the following steps: weighing molasses and part of inorganic salt compounds according to a ratio of 2-4: 1, uniformly mixing water with the weight of 1-2 times of that of the molasses and part of the inorganic salt compounds to obtain inorganic salt compound mixed liquor, taking the molasses and carrying out centrifugal filtration, then taking hydrogen peroxide with the volume of 0.2-0.3 times of that of the molasses and mixing the hydrogen peroxide with the filtered molasses, then adding the mixture into the inorganic salt compound mixed liquor for mixing and stirring, and then storing for 30-60 min.
5. The grinding aid for improving cement yield according to claim 4, wherein the grinding aid is characterized in that: adding into the inorganic salt compound mixed solution, mixing and stirring for more than 30min at the temperature of 10-20 ℃, wherein the stirring speed is not less than 2000 rps.
6. The grinding aid for improving cement yield according to claim 4, wherein the grinding aid is characterized in that: mixing 0.2-0.3 times of hydrogen peroxide by volume with molasses, putting the mixture into a high-pressure reaction kettle with the pressure of 0.05MPa to 0.08MPa, and fully reacting at the temperature of 60-75 ℃, wherein the concentration of the hydrogen peroxide is 25-30%.
7. A method for increasing the yield of cement by using the grinding aid for increasing the yield of cement as claimed in any one of claims 1 to 6, wherein the grinding aid comprises the following components in percentage by weight: in the cement grinding production, a finished grinding aid is mixed into a cement grinding head of a ball mill through a centrifugal pump, then the flow of the grinding aid is adjusted according to 0.02-0.1% of the production capacity of cement, and the grinding aid and a cement raw material are fed into the ball mill together for grinding to obtain a cement finished product.
8. A method of increasing cement production according to claim 7, wherein: grinding aid and cement raw material are put into a ball mill together for grinding into powder with Brinell ratio of 320- 2 Per kg of fine powder.
9. A method for increasing cement production according to claim 7 or 8, characterized in that: the grinding temperature is not more than 120 ℃.
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| CN116459650A (en) * | 2023-04-20 | 2023-07-21 | 北京工业大学 | Integrated system and process for capturing and utilizing flue gas carbon of cement kiln |
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| CN102503232A (en) * | 2011-10-19 | 2012-06-20 | 沈阳建筑大学 | Environment-friendly, high-efficient and composite liquid cement grinding aid and preparation method thereof |
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| CN102503232A (en) * | 2011-10-19 | 2012-06-20 | 沈阳建筑大学 | Environment-friendly, high-efficient and composite liquid cement grinding aid and preparation method thereof |
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