CN116040968B - Cement raw material liquid grinding aid and preparation method and application thereof - Google Patents
Cement raw material liquid grinding aid and preparation method and application thereof Download PDFInfo
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- 238000000227 grinding Methods 0.000 title claims abstract description 99
- 239000002994 raw material Substances 0.000 title claims abstract description 72
- 239000004568 cement Substances 0.000 title claims abstract description 49
- 239000007788 liquid Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000011593 sulfur Substances 0.000 claims abstract description 24
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 24
- 239000003245 coal Substances 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 239000002699 waste material Substances 0.000 claims abstract description 18
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 claims description 16
- 229910017569 La2(CO3)3 Inorganic materials 0.000 claims description 14
- NZPIUJUFIFZSPW-UHFFFAOYSA-H lanthanum carbonate Chemical compound [La+3].[La+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O NZPIUJUFIFZSPW-UHFFFAOYSA-H 0.000 claims description 14
- 229960001633 lanthanum carbonate Drugs 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 235000012054 meals Nutrition 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 claims description 8
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims description 8
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 8
- 229910001487 potassium perchlorate Inorganic materials 0.000 claims description 8
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 7
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 7
- 239000004202 carbamide Substances 0.000 claims description 7
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims description 5
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 5
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 5
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 5
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 5
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 5
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 5
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 4
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000000654 additive Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- -1 alcohol amine Chemical class 0.000 description 3
- 239000007910 chewable tablet Substances 0.000 description 3
- 229940068682 chewable tablet Drugs 0.000 description 3
- 239000011362 coarse particle Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 208000020832 chronic kidney disease Diseases 0.000 description 1
- 208000022831 chronic renal failure syndrome Diseases 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000001631 haemodialysis Methods 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000000322 hemodialysis Effects 0.000 description 1
- 201000005991 hyperphosphatemia Diseases 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052600 sulfate mineral Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- 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
Abstract
The invention relates to the technical field of cement production additives, in particular to a cement raw material liquid grinding aid which can adapt to a raw material roller press and a vertical mill, has the functions of grinding aid, coal saving and sulfur fixation and utilizes wastes.
Description
Technical Field
The invention relates to the technical field of cement production additives, in particular to a cement raw material liquid grinding aid and a preparation method and application thereof.
Background
The cement raw material is a material which is prepared by mixing lime raw material, clay raw material and a small amount of correction raw material (mineralizer, seed crystal and the like are added in some cases, coal is added in the vertical kiln production) according to a proportion, and grinding the materials to a certain fineness. The grinding efficiency can be improved to a certain extent and the grinding energy consumption can be reduced by doping a certain amount of grinding aid in the raw material grinding process. The grinding performance of raw materials is improved by mainly utilizing organic grinding aid on the market at present, the grinding aid is adsorbed on the surfaces of raw material particles based on the principle that the raw material grinding aid reduces the surface energy of particle cracks so as to accelerate crack propagation or foreign ions are introduced to neutralize valence bonds on the particle sections so as to avoid particle adhesion and aggregation, the grinding aid of the raw materials is improved, the grinding aid is single, and the grinding aid effect has a certain limitation. At present, in response to the call of national environmental protection and energy conservation, enterprises with higher energy consumption, such as cement factories, and the like, are urgently required to search new efficient, environmental protection and energy conservation type grinding-assisting products.
At present, a vertical mill or a roll mill system is mainly adopted for domestic raw material mill, and the two systems have strong destructive power to materials, but the particle shape of the materials is flat, the molecular diffusion is influenced, the combustibility of clinker is influenced, the sintering state in a kiln is poor, and finally the mineral formation and the energy consumption of the sintered clinker are influenced. The components used by the existing raw material grinding aid are the same as those used by the cement grinding aid, namely: alcohol amine substances such as triethanolamine, triisopropanolamine and their complexes, etc. The traditional raw material grinding aid has the defects of unsatisfactory grinding aid effect due to single component and inconsistent grinding mode with cement.
In terms of the selection mode of the mill, the raw mill is mainly a vertical mill, and the cement mill is mainly a ball mill. The components used by the existing raw material grinding aid are the same as those used by the cement grinding aid, namely: alcohol amine substances such as triethanolamine, triisopropanolamine and their complexes, etc. The alcohol amine substances have a certain grinding assisting effect because the two are different in grinding mode, but the grinding assisting effect is not ideal. For cement grinding, a grinding process of a roller press ball mill powder concentrator is generally adopted. The cement powder is ground and selected, fine and slight particles are collected along with the rising of air flow and then become a finished product, and coarse particles enter a ball mill to be continuously ground. In the presence of the grinding aid, the agglomerated particles in the ball mill are dispersed into small particles, and since the coarse particles remain in the ball mill for a longer period of time, the dispersed small particles are further ground in the ball mill to become particles having a smaller particle diameter. However, cement raw meal grinding is different from cement grinding; for grinding cement raw materials, a grinding process of a roller press/vertical mill powder concentrator is generally adopted. Under the condition that the grinding aid exists, the grinding aid and raw material powder particles are fully mixed under the cyclone action of a powder selecting machine, large particles formed by agglomeration can be directly dispersed into small particles to be taken away in the mixing process, and coarse particles which are not taken away can be further ground. That is, cement raw meal grinding has no step of continuing to grind small particles into smaller particles as compared to cement grinding. Therefore, grinding of the raw materials requires that the grinding aid has stronger electrostatic repulsive force to prevent the adhesion of fine raw material particles; there is also a need for stronger surfactants that reduce interfacial tension to improve the grinding efficiency of the raw meal.
Raw material components with grinding aid, coal saving and desulfurization effects are added into the raw material grinding aid, so that the raw material grinding aid is in a new development direction, the grindability of the raw material is improved through the synergistic promotion of various materials, the particle shape of the material is improved, and the sintering quality is improved; improving the easy burning property of clinker and reducing the energy consumption of burning. Wherein, part of raw materials have the coal-saving property at the same time, so that the coal consumption can be reduced, and the energy can be saved. One or more of the raw materials has the characteristics of desulfurization and sulfur fixation, and can reduce SO 2 Is arranged in the air.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a cement raw material liquid grinding aid which is different from a clinker grinding aid, can adapt to a raw material roller press and a vertical mill, has grinding aid, coal saving and sulfur fixation, and utilizes wastes.
In order to achieve the aim, the invention provides a cement raw material liquid grinding aid, which consists of the following components: waste liquid from lanthanum carbonate production, active component, grinding assisting component, coal saving component, sulfur fixing component and water.
Specifically, the composition comprises the following components: 10-15 parts of lanthanum carbonate production waste liquid, 10-15 parts of active components, 20-35 parts of grinding assisting components, 5-10 parts of coal saving components, 5-10 parts of sulfur fixing components and a proper amount of water. Preferably, the water is 30-150 parts, more preferably, the water is 50-90 parts.
La 2 (CO 3 ) 3 The chewable tablet is used for treating hyperphosphatemia of patients with chronic renal failure in hemodialysis or continuous ambulatory peritoneal dialysis, raw material medicaments are generally prepared from ionic rare earth ores, and a large amount of waste liquid containing lanthanum heavy metals is generated in the production process, so that the chewable tablet belongs to inorganic pollutants, and if the chewable tablet cannot be effectively treated, the damage to the environment and human health can be caused. The waste liquid produced in lanthanum carbonate production is used as industrial hazardous waste, is generally specially treated by a sewage treatment plant, and has high treatment cost. The research of the invention shows that the cement raw material liquid grinding aid prepared by properly adding the waste liquid from lanthanum carbonate production can change waste into valuable, and the waste liquid from lanthanum carbonate productionLanthanum ions contained in the liquid can prevent fine particles which are qualified in grinding from agglomerating, the mobility of a mill is improved, and trace element lanthanum can reduce the calcination temperature and liquid phase viscosity of clinker, so that the method plays a positive role in improving the combustibility of cement.
Preferably, the active component is at least one of sodium lignin sulfonate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate. The addition of the waste liquid from lanthanum carbonate production improves grindability and easy burn of raw materials, but also leads to easy delamination and difficult storage of grinding aids, and the adoption of the waste liquid from lanthanum carbonate production can influence the preheating effect of the raw materials in the suspension preheater.
Preferably, the active components are a mixture of sodium lignin sulfonate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate in the mass ratio of (0.5-1) (0.2-0.5).
Preferably, the grinding aid component is at least one of sodium pyrophosphate, triethanolamine, triisopropanolamine, aminoethanol and diethanol monoisopropanolamine.
More preferably, the grinding aid component is a mixture of sodium pyrophosphate, triethanolamine, triisopropanolamine and diethanol monoisopropanolamine with the mass ratio of (0.2-0.5): 1-1.5): 1.5-2.5.
Preferably, the coal-saving component is at least one of potassium perchlorate, barium nitrate, ferric chloride and industrial salt.
More preferably, the coal-saving component is a mixture of potassium perchlorate, barium nitrate, ferric chloride and industrial salt in the mass ratio of (0.5-1.5): 0.2-0.5): 0.5-1): 3. The potassium perchlorate and the barium nitrate are strong oxidants, can increase the concentration of oxygen in the combustion process, continuously decompose oxygen at different temperatures, can quickly and fully combust combustible substances in coal, and can reduce the sintering temperature of clinker, accelerate the formation of clinker minerals in the calcination process and indirectly reduce the consumption of coal.
Preferably, the sulfur-fixing component is at least one of sodium bicarbonate, potassium carbonate and urea.
More preferably, the sulfur-fixing component is a mixture of sodium bicarbonate, potassium carbonate and urea in the mass ratio of (0.5-1.5) to (0.5-1) to 1. While raw materials react in the preheater, the desulfurization component can react with flue gas containing sulfur dioxide to enable sulfur to be solidified and remain in raw material particles, and the sulfur-containing raw materials can be converted into clinker in the rotary kiln to generate sulfate minerals so that the sulfur is stably present in the clinker, and the emission of harmful gases is remarkably reduced.
The invention also relates to a preparation method of the cement raw material liquid grinding aid, which comprises the following steps:
1) Weighing the components according to the weight portions,
2) Adding the coal-saving component and the sulfur-fixing component into water, stirring until the components are completely dissolved to obtain a solution a,
3) Adding the lanthanum carbonate production waste liquid, the active component and the grinding aid component into the solution a, and stirring and mixing uniformly to obtain the product.
Preferably, the temperature of the water of step 2) is less than 35 ℃.
Furthermore, the invention also relates to application of the cement raw material liquid grinding aid in a cement raw material grinding process. Preferably, the mixing amount of the cement raw material liquid grinding aid is 0.03-0.1% of the total mass of the raw material.
Compared with the prior art, the invention has the following beneficial effects:
(1) In the raw material grinding process, qualified fine powder can be rapidly separated out under the action of waste liquid, active components and grinding assisting components in the production of lanthanum carbonate, and the grindability of materials is improved, so that the load of a raw material mill is reduced, the hourly yield of the raw material mill is greatly improved, and the unit power consumption of the mill is reduced.
(2) In the process of raw material preheating and decomposing, the combustibility of raw materials is improved under the action of coal-saving components and desulfurization components, the combustion conditions in the preheater and the rotary kiln are improved, the combustion efficiency of coal is obviously improved, the effects of energy conservation and emission reduction are achieved, the economic benefit of reducing the coal consumption is brought, and meanwhile, the emission of pollutant gases such as sulfur dioxide and the like is reduced, and the environmental pollution is reduced, so that the aims of grinding assistance, coal saving and desulfurization are simultaneously achieved.
Detailed Description
Grinding aids prepared by using the examples and comparative examples are tested on cement dry production lines, a roller press and a powder concentrator are adopted for grinding raw materials, the addition amount of the grinding aid is 0.06% of the total mass of the raw materials, and the grinding aids are used for grinding raw materials in a table (ton), fineness of the raw materials (80 mu m screen residue), coal consumption (ton) of cement for 1 day and sulfur content of flue gas (mg/m) 3 ) And (5) detecting.
Example 1
The liquid grinding aid for cement raw materials consists of the following components: 15 parts of lanthanum carbonate production waste liquid, 15 parts of active components, 25 parts of grinding assisting components, 8 parts of coal-saving components, 7 parts of sulfur fixing components and 80 parts of water, wherein the active components are sodium lignin sulfonate, the grinding assisting components are triethanolamine, the coal-saving components are a mixture of potassium perchlorate and barium nitrate in a ratio of 1:0.5, and the sulfur fixing components are urea. Through detection, when the raw material is ground into a table: 233 tons of raw meal fineness (80 μm screen residue): 19%, 1 day coal consumption of cement: 131 tons and 106mg/m sulfur content in flue gas 3 。
Example 2
The liquid grinding aid for cement raw materials consists of the following components: 15 parts of lanthanum carbonate production waste liquid, 15 parts of active components, 25 parts of grinding assisting components, 8 parts of coal-saving components, 7 parts of sulfur fixing components and 80 parts of water, wherein the active components are a mixture of sodium lignin sulfonate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate in a mass ratio of 0.7:0.2:0.3, the grinding assisting components are a mixture of sodium pyrophosphate, triethanolamine, triisopropanolamine and diethanol monoisopropanolamine in a mass ratio of 0.5:1:1.5:2, the coal-saving components are a mixture of potassium perchlorate, barium nitrate, ferric chloride and industrial salt in a mass ratio of 1:0.4:1:3, and the sulfur fixing components are a mixture of sodium bicarbonate, potassium carbonate and urea in a mass ratio of 1:1:1. Through detection, when the raw material is ground into a table: 237 tons of raw meal fineness (80 μm screen residue): 18%, 1 day coal consumption of cement: 127 tons and 85mg/m sulfur content of flue gas 3 。
Comparative example 1
The grinding aid consists of the following components: 30 parts of active component, 25 parts of grinding assisting component, 8 parts of coal saving component, 7 parts of sulfur fixing component and 80 parts of waterThe active component is sodium lignin sulfonate, the grinding aid component is triethanolamine, the coal-saving component is a mixture of potassium perchlorate and barium nitrate in a ratio of 1:0.5, and the sulfur fixing component is urea. Through detection, when the raw material is ground into a table: 206 tons of raw meal fineness (80 μm screen residue): 25% of coal consumption of cement for 1 day: 135 tons and 117mg/m sulfur content of flue gas 3 。
Comparative example 2
The liquid grinding aid for cement raw materials consists of the following components: 30 parts of lanthanum carbonate production waste liquid, 25 parts of grinding assisting component, 8 parts of coal saving component, 7 parts of sulfur fixing component and 80 parts of water, wherein the active component is sodium lignin sulfonate, the grinding assisting component is triethanolamine, the coal saving component is a mixture of potassium perchlorate and barium nitrate in a ratio of 1:0.5, and the sulfur fixing component is urea. Through detection, when the raw material is ground into a table: 212 tons of raw meal fineness (80 μm screen residue): 22% of coal consumption of cement for 1 day: 127 tons and 115mg/m sulfur content of flue gas 3 。
Blank examples
Cement was prepared under the same conditions without adding grinding aid. Through detection, when the raw material is ground into a table: 187 tons, fineness of raw meal (80 μm screen residue): 35% of coal consumption of cement for 1 day: 147 ton and 365mg/m sulfur content of fume 3 。
Compared with the liquid grinding aid without adding the grinding aid, the liquid grinding aid for cement raw materials can greatly change the grinding condition and reduce the fineness of raw materials, so that the per-time yield of the raw materials is improved, the raw materials are easy to burn due to the thinner fineness of the raw materials, the coal consumption in 1 day under the action of a coal-saving component can be greatly reduced, and the sulfur content of flue gas due to the addition of a sulfur-fixing component is also greatly reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limited thereto; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features can be replaced with equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The liquid grinding aid for the cement raw material is characterized by comprising the following components: 10-15 parts of lanthanum carbonate production waste liquid, 10-15 parts of active components, 20-35 parts of grinding assisting components, 5-10 parts of coal saving components, 5-10 parts of sulfur fixing components and 50-90 parts of water;
the active component is at least one of sodium lignin sulfonate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate.
2. The cement raw material liquid grinding aid according to claim 1, wherein the active components are a mixture of sodium lignin sulfonate, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate in a mass ratio of (0.5-1): 0.2-0.5.
3. The cement raw material liquid grinding aid of claim 1, wherein the grinding aid component is at least one of sodium pyrophosphate, triethanolamine, triisopropanolamine, aminoethanol, diethanol monoisopropanolamine.
4. The cement raw material liquid grinding aid according to claim 3, wherein the grinding aid component is a mixture of sodium pyrophosphate, triethanolamine, triisopropanolamine and diethanol monoisopropanolamine in a mass ratio of (0.2-0.5): 1-1.5): 1.5-2.5.
5. The cement raw material liquid grinding aid of claim 1, wherein the coal-saving component is at least one of potassium perchlorate, barium nitrate, ferric chloride, and industrial salts.
6. The cement raw material liquid grinding aid of claim 1, wherein the sulfur-fixing component is at least one of sodium bicarbonate, potassium carbonate, and urea.
7. The method for preparing a cement raw material liquid grinding aid according to any one of claims 1 to 6, comprising the steps of:
1) Weighing the components according to the weight portions,
2) Adding the coal-saving component and the sulfur-fixing component into water, stirring until the components are completely dissolved to obtain a solution a,
3) Adding the lanthanum carbonate production waste liquid, the active component and the grinding aid component into the solution a, and stirring and mixing uniformly to obtain the product.
8. Use of the cement raw meal liquid grinding aid according to any one of claims 1-6 in a cement raw meal grinding process.
9. The use according to claim 8, characterized in that the cement raw meal liquid grinding aid is incorporated in an amount of 0.03-0.1% of the total mass of raw meal.
Priority Applications (1)
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