CN116333791B - Grinding aid and nano hydrocarbon fuel nano crushing pre-process - Google Patents
Grinding aid and nano hydrocarbon fuel nano crushing pre-process Download PDFInfo
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- 238000000227 grinding Methods 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000008569 process Effects 0.000 title claims abstract description 40
- 239000000446 fuel Substances 0.000 title claims abstract description 32
- 239000004215 Carbon black (E152) Substances 0.000 title claims description 26
- 229930195733 hydrocarbon Natural products 0.000 title claims description 7
- 150000002430 hydrocarbons Chemical class 0.000 title claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000003245 coal Substances 0.000 claims abstract description 50
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 25
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000292 calcium oxide Substances 0.000 claims abstract description 22
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 22
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 18
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims description 57
- 239000003250 coal slurry Substances 0.000 claims description 25
- 238000010298 pulverizing process Methods 0.000 claims description 24
- 230000001804 emulsifying effect Effects 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000004945 emulsification Methods 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 2
- 239000001257 hydrogen Substances 0.000 abstract description 2
- 229910021392 nanocarbon Inorganic materials 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 18
- 239000002817 coal dust Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- 238000005054 agglomeration Methods 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005036 potential barrier Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007709 nanocrystallization Methods 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/326—Coal-water suspensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/06—Selection or use of additives to aid disintegrating
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention provides a grinding aid and a nano-carbon hydrogen fuel nano-crushing pre-process. The grinding aid comprises 15-40% of silicon dioxide, 10-30% of calcium oxide and 20-60% of sodium tripolyphosphate. Can solve the problem of low crushing efficiency of micro-nano pulverized coal in the prior art, and is suitable for the field of environmental protection fuels.
Description
Technical Field
The invention relates to the field of environment-friendly fuels, in particular to a grinding aid and a nano-carbon hydrogen fuel nano-crushing pre-process.
Background
The nano hydrocarbon fuel is a novel superfine particle fuel which is developed and prepared by processing coal by utilizing the industrial nano powder production technology and other matched processes. The combustion property is similar to that of coal water slurry, the specific surface area and the surface activity are relatively high, the combustion efficiency is high, the pollutant discharge amount is low, and the like, and the novel coal-based special fuel is high-efficiency and clean.
In the nanocrystallization crushing process, after the granularity of the pulverized coal particles is reduced to a micro-nano level, the mass of the particles is reduced and tends to be uniform, the original defects are reduced, the strength and the hardness are gradually increased, the energy required for further crushing is increased, and the crushing difficulty is gradually increased. Meanwhile, because the specific surface area and the surface energy are obviously increased, the tendency of mutual agglomeration of fine particles (secondary or tertiary particles are formed) is obviously enhanced, the viscosity of the slurry is obviously improved, and the fluidity of the slurry is obviously deteriorated. Crushing is carried out by using the traditional method, the crushing efficiency is obviously reduced, and the energy consumption of unit product is obviously improved.
The superfine pulverizing process is not only a simple physical process for reducing the particle size, but also involves the change of the physical and chemical properties of the pulverized coal particles caused by the mechanical superfine pulverizing effect. The prior art has more researches on the mechanochemical effect in the superfine grinding process, but the influence of the physicochemical property change of the coal particles on the grinding aid selection and the processing efficiency in the micro-nano grinding process is almost blank.
Disclosure of Invention
The invention mainly aims to provide a grinding aid and a nano hydrocarbon fuel nano grinding preposition process, which are used for solving the problem of low micro-nano pulverized coal grinding efficiency in the prior art.
In order to achieve the above object, according to a first aspect of the present invention, there is provided a grinding aid comprising silica, calcium oxide and sodium tripolyphosphate, in which the mass content of silica is 15% to 40%, the mass content of calcium oxide is 10% to 30%, and the mass content of sodium tripolyphosphate is 20% to 60%.
Further, in the grinding aid, the mass content of silicon dioxide is 35%, the mass content of calcium oxide is 15%, and the mass content of sodium tripolyphosphate is 50%.
Further, the D50 of the silicon dioxide is 40-500 nm; preferably, the calcium oxide has a D50 of 0.2-5 microns.
In order to achieve the above object, according to a second aspect of the present invention, there is provided a nano-pulverizing pre-process for nano-hydrocarbon fuel, comprising mixing with coal slurry using the above grinding aid to prepare a modified raw material for preparing nano-hydrocarbon fuel; the coal slurry is obtained by mixing pulverized coal particles after pre-crushing with water.
Further, the mass ratio of the grinding aid to the pulverized coal particles is 0.005-0.05:1.
Further, the mass ratio of grinding aid to pulverized coal particles is 0.012:1.
Further, the nanometer hydrocarbon fuel nanometer crushing pre-process is characterized by comprising the following steps: mixing the pre-crushed pulverized coal particles with water to obtain coal slurry; dispersing grinding aid into the coal slurry; wherein, the mass content of the coal powder particles in the coal slurry is 25% -60%, preferably 40%.
Further, dispersing the grinding aid in the coal slurry, and dispersing in a shearing and emulsifying mode.
Further, the time of shearing and emulsifying is 15-30 min; preferably, the power of the shearing emulsifying device is 0.5-5 kw; preferably, the rotational speed of the shear emulsification is 5000 to 15000 rpm.
Further, the grinding aid is added in a one-time manner.
By applying the technical scheme of the invention, molecules in the improved grinding aid containing silicon dioxide, calcium oxide and sodium tripolyphosphate can be adsorbed on pulverized coal particles, so that the rheological property of ore pulp and the surface electrical property of ore particles are regulated, hydroxyl groups, electrostatic effect and the like are reduced, the viscosity of the ore pulp is reduced, the grindability of materials is improved, the dispersion of the particles is promoted, the adhesion of the ore particles on grinding media and mill lining plates and the agglomeration among the particles are prevented, the flowability is improved, the fineness and the yield of products are improved, the crushing limit is increased, and the energy consumption of the products is reduced. When the particle is used, the surface of the charged coal particles can act with the grinding aid to form an electric potential barrier for preventing particles from gathering, so that the particle can be dispersed. Meanwhile, the hydration membrane separates coal particles, so that the resistance among the coal particles is reduced, and the viscosity reduction effect is achieved. The grinding aid can change the surface activity of powder, reduce the hydroxyl and electrostatic effects and obtain better grinding efficiency. Therefore, by using the grinding aid, better grinding efficiency can be obtained in grinding raw material coal dust, and micro-nano-level coal dust can be obtained in a shorter time.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The present application will be described in detail with reference to examples.
Term interpretation:
micro-nano pulverized coal: pulverized coal with D 50 of 0.2-1.0 μm.
As mentioned in the background art, with the existing pulverizing method, it is difficult to efficiently pulverize micro-nano pulverized coal particles, and the pulverizing time and cost are long. Therefore, the inventor tries to explore the influence of physicochemical property changes of coal particles in the micro-nano grinding process on grinding aid selection and processing efficiency, and develops the grinding aid capable of efficiently grinding micro-nano coal dust, so that a series of protection schemes are provided.
In a first exemplary embodiment of the present application, a grinding aid is provided that includes silica, calcium oxide, and sodium tripolyphosphate. In the grinding aid, the mass content of silicon dioxide is 15-40%, the mass content of calcium oxide is 10-30%, and the mass content of sodium tripolyphosphate is 20-60%.
In the pulverizing process of coal powder, the particle size of raw coal is reduced to form dynamic balance of pulverization and agglomeration, exposed functional groups of the particles after superfine pulverization are increased, and side chains are easily oxidized into hydrophilic functional groups such as hydroxyl groups, carbonyl groups and carboxyl groups, so that the hydrophobicity of the new surfaces of the particles is affected.
The molecules of the grinding aid can be adsorbed on pulverized coal particles, the rheological property of ore pulp and the surface electrical property of ore particles are regulated, hydroxyl groups, electrostatic effects and the like are reduced, the viscosity of the ore pulp is reduced, the grindability of materials is improved, the dispersion of the particles is promoted, the adhesion of the ore particles on grinding media and mill lining plates and the agglomeration among the particles are prevented, the flowability is improved, the fineness and the yield of products are improved, the crushing limit is improved, and the energy consumption of the products is reduced. When the particle is used, the surface of the charged coal particles can act with the grinding aid to form an electric potential barrier for preventing particles from gathering, so that the particle can be dispersed. Meanwhile, the hydration membrane separates coal particles, so that the resistance among the coal particles is reduced, and the viscosity reduction effect is achieved. Therefore, the grinding aid can change the surface activity of the powder, reduce the hydroxyl and electrostatic effects and obtain better grinding efficiency.
Among the above grinding aids, silica. The calcium oxide and the sodium tripolyphosphate are matched with each other, so that better capability of grinding the pulverized coal can be generated. The grinding aid formed by combining 15-40% of silicon dioxide, 10-30% of calcium oxide and 20-60% of sodium tripolyphosphate can obtain better capabilities of reducing the hydroxyl group, electrostatic adsorption force and the like of coal dust, and plays better grinding aid capability in actual grinding aid crushing, and the crushing efficiency is high.
In a preferred embodiment, in the grinding aid, the mass content of silica is 35%, the mass content of calcium oxide is 15%, and the mass content of sodium tripolyphosphate is 50%.
In a preferred embodiment, the D50 of the silica is 40-500 nm; preferably, the calcium oxide has a D50 of 0.2-5 microns.
The silicon dioxide is used as a grinding aid, a large amount of hydrophilic groups exist on the surface of the silicon dioxide, moisture can be absorbed to form a hydrophilic film, and the surface resistance is reduced by virtue of proton transfer, so that the antistatic effect is exerted. Can also promote pulverized coal to be crushed and refined, and provides a co-ground material with a high-porosity structure for rapid moisture permeation. The D 50 is silicon dioxide with the diameter of 40-500 nm, which is similar to the particle diameter of the micro-nano pulverized coal to be obtained, and the pulverizing effect is good.
In a second exemplary embodiment of the present application, a nano-hydrocarbon fuel nano-pulverizing pre-process is provided, and the grinding aid is mixed with coal slurry, that is, the grinding aid is dispersed into coal slurry to be nano-pulverized to prepare a modified raw material for preparing nano-hydrocarbon fuel, wherein the coal slurry is a coal slurry obtained by mixing pre-pulverized coal powder particles with water.
Preferably, the pulverized coal particles with the carbon content of 63% -65%, the alumina content of 13% -15%, the silica content of 8% -10%, the calcium oxide content of 1.2% -1.8% and the ferric oxide content of 1.0% -1.5% are more matched with the grinding aid, so that a proper modified raw material can be obtained, and the subsequent nanometer grinding has better grinding efficiency, so that ideal nanometer primary pulp (namely the coal slurry containing micro-nano-level pulverized coal) is obtained.
In a preferred embodiment, the mass ratio of grinding aid to pulverized coal particles is 0.005-0.05:1.
In a preferred embodiment, the mass ratio of grinding aid to pulverized coal particles is 0.012:1.
The mass ratio of the grinding aid to the pulverized coal particles (i.e. solid raw materials) in the nano-hydrocarbon fuel nano-pulverizing pre-process is kept in the range of 0.005-0.05:1. If the addition amount of the grinding aid is too large, not only waste and cost rise are caused, but also the grinding is inhibited; if the addition amount is too small, the surface activity degree of the powder is changed in an overall way, so that the promotion effect of the auxiliary agent on crushing is insufficient, and the crushing efficiency is low.
In a preferred embodiment, the nano-hydrocarbon fuel nano-comminution pre-process comprises: mixing the pre-crushed pulverized coal particles with water to obtain coal slurry; dispersing grinding aid into the coal slurry; wherein, the mass content of the coal powder particles in the coal slurry is 25% -60%, preferably 40%.
In the coal slurry, the solid content is 25% -60%, and the coal slurry has proper viscosity and good fluidity, and is beneficial to subsequent crushing.
In a preferred embodiment, the coal fines particles are dispersed in the slurry by shear emulsification.
In a preferred embodiment, the time of shear emulsification is 15 to 30 minutes; preferably, the power of the shearing emulsifying device is 0.5-5 kw; preferably, the rotational speed of the shear emulsification is 5000 to 15000 rpm.
The common grinding aid dispersing process comprises an emulsifying process, an ultrasonic process, a mechanical stirring process and the like, and aiming at the grinding aid used by the application, the process experiments are respectively carried out by utilizing the different grinding processes, and as the grinding aid contains silicon dioxide and calcium oxide, the granularity is nano-scale, the surface energy is larger, the coal dust is dispersed by utilizing a shearing and emulsifying method, and the grinding effect is optimal.
In a preferred embodiment, the grinding aid is added in a single addition.
The grinding aid is an inorganic grinding aid, and the phenomenon of easy agglomeration of the organic grinding aid caused by heat release of grinding and grinding in dispersing and subsequent grinding is avoided. Therefore, in the pre-process of nano-crushing the nano-hydrocarbon fuel, the grinding aid is added into the grinding system at one time and can play a role, and the operation is simple and easy to control and quantify.
The advantageous effects of the present application will be explained in further detail below in connection with specific examples.
Example 1
Grinding aid: the proportion of silicon dioxide is 35%, the proportion of calcium oxide is 15%, and the proportion of sodium tripolyphosphate is 50%.
The coal slurry is 10 kg, the solid content is 25%, the coal slurry is mixed in a shearing and emulsifying mode, the power of shearing and emulsifying equipment is 1 kilowatt, the rotating speed is 8000 revolutions per minute, the grinding aid is added into the coal slurry at one time, and the mass ratio of the grinding aid to the solid content is 0.012:1, so that the modified raw material for preparing the nano hydrocarbon fuel is prepared. The modified raw material is continuously stirred and crushed. The pulverized system was sampled at a fixed time point and the pulverized coal particle size was measured, and the data are shown in table 1.
Table 1 data of coal fines experiment after grinding aid addition
The processing time is the time when the modified raw material is subjected to nanometer crushing. In the process of nano-pulverizing, the pulverized coal D 50 reaches about 2 microns within 30 minutes, the median particle size reaches about 1.1 microns within 60 minutes, the D 50 reaches 0.93 microns within 90 minutes, and the D 50 reaches 0.89 microns within 120 minutes.
Example 2
The comminution process is the same as in example 1, except that the grinding aid: the proportion of silicon dioxide is 15%, the proportion of calcium oxide is 25%, and the proportion of sodium tripolyphosphate is 60%. The data are shown in table 2.
TABLE 2
Example 3
The comminution process is the same as in example 1, except that the grinding aid: the proportion of silicon dioxide is 40%, the proportion of calcium oxide is 30%, and the proportion of sodium tripolyphosphate is 30%. The data are shown in table 3.
TABLE 3 Table 3
Example 4
Grinding aid is the same as in example 1 except that the dispersing method is ultrasonic pulverization. The data are shown in table 4.
TABLE 4 Table 4
Example 5
Grinding aid is the same as in example 1 except that the dispersing method is mechanical stirring and pulverizing. The data are shown in table 5.
TABLE 5
Comparative example 1
The procedure is as in example 1, except that no grinding aid is added. The data are shown in table 6.
TABLE 6
Experimental data shows that coal powder D 50 drops rapidly from 14 microns to about 5 microns and then below 5 microns after 30 minutes in a 5 minute processing time, but the processing efficiency drops substantially in a subsequent time period, and coal powder D 50 drops only from 4.89 to 3.48 microns even if the processing time is extended to 3 hours. With the extension of the ultrafine grinding time, the particles are gradually in a dynamic balance state of grinding-agglomerating, and gradually approach the ultrafine grinding limit when the median particle size of the pulverized coal is below about 5 microns.
Comparative example 2
The comminution process is the same as in example 1, except that the grinding aid: the proportion of silicon dioxide is 50%, the proportion of calcium oxide is 5%, and the proportion of sodium tripolyphosphate is 45%. The data are shown in Table 7.
TABLE 7
Comparative example 3
The comminution process is the same as in example 1, except that the grinding aid: the proportion of silicon dioxide is 40%, and the proportion of sodium tripolyphosphate is 60%. The data are shown in table 8.
TABLE 8
Comparative example 4
The comminution process is the same as in example 1, except that the grinding aid: the proportion of calcium oxide is 30% and the proportion of sodium tripolyphosphate is 70%. The data are shown in table 9.
TABLE 9
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: compared with the grinding aid in the prior art, the grinding aid can crush the coal dust in a short time to obtain micro-nano-level coal dust, improve crushing efficiency, product fineness and product yield, improve crushing limit and reduce product energy consumption.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. The grinding aid for preparing the modified raw material of the nano hydrocarbon fuel is characterized by comprising 15-40% of silicon dioxide, 10-30% of calcium oxide and 20-60% of sodium tripolyphosphate;
the D50 of the silicon dioxide is 40-500 nm;
the D50 of the calcium oxide is 0.2-5 microns.
2. The grinding aid according to claim 1, wherein in the grinding aid, the mass content of the silica is 35%, the mass content of the calcium oxide is 15%, and the mass content of the sodium tripolyphosphate is 50%.
3. A nano-pulverizing pre-process of nano-hydrocarbon fuel, which is characterized in that the grinding aid of any one of claims 1 to 2 is used for mixing with coal slurry to prepare a modified raw material for preparing nano-hydrocarbon fuel;
The coal slurry is obtained by mixing pulverized coal particles after pre-crushing with water.
4. The nano-hydrocarbon fuel nano-crushing pre-process according to claim 3, wherein the mass ratio of the grinding aid to the pulverized coal particles is 0.005-0.05:1.
5. The nano-hydrocarbon fuel nano-pulverizing pre-process according to claim 4, wherein the mass ratio of the grinding aid to the pulverized coal particles is 0.012:1.
6. The nano-hydrocarbon fuel nano-pulverizing pre-process according to any one of claims 3 to 5, wherein the nano-hydrocarbon fuel nano-pulverizing pre-process comprises:
dispersing the grinding aid into the coal slurry;
Wherein the mass content of the coal powder particles in the coal slurry is 25% -60%.
7. The nano-hydrocarbon fuel nano-pulverizing pre-process according to claim 6, wherein the mass content of the pulverized coal particles in the coal slurry is 40%.
8. The nano-hydrocarbon fuel nano-pulverizing pre-process according to claim 6, wherein the grinding aid is dispersed in the coal slurry by a shearing and emulsifying method.
9. The nano-hydrocarbon fuel nano-pulverizing pre-process according to claim 8, wherein the time of shearing and emulsifying is 15-30 min.
10. The nano-hydrocarbon fuel nano-pulverizing pre-process according to claim 8, wherein the power of the shearing and emulsifying equipment is 0.5-5 kw.
11. The nano-hydrocarbon fuel nano-pulverizing pre-process according to claim 8, wherein the rotational speed of the shear emulsification is 5000-15000 rpm.
12. The nano-hydrocarbon fuel nano-pulverizing pre-process according to claim 9, wherein the grinding aid is added in a one-time manner.
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| CN104449569A (en) * | 2014-11-18 | 2015-03-25 | 桂林华越环保科技有限公司 | Mineral powder grinding aid |
| CN107032819A (en) * | 2017-04-17 | 2017-08-11 | 中国神华能源股份有限公司 | A kind of method that utilization white clay produces foamed ceramic fire-retardant heat-insulation material |
| EP3854484A3 (en) * | 2020-10-05 | 2021-08-18 | Kronos International, Inc. | Grinding aid for grinding titanium dioxide |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104785349A (en) * | 2015-04-29 | 2015-07-22 | 浙江冠旗纳米科技有限公司 | Efficient preparation method for nano-scale solid powder |
| CN111534342A (en) * | 2020-04-27 | 2020-08-14 | 深圳瑞科天启科技有限公司 | High-concentration coal water slurry and preparation method and application thereof |
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| CN116333791A (en) | 2023-06-27 |
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