CN116285897A - Long-acting snow-melting agent based on modified zeolite slow-release matrix and preparation method thereof - Google Patents
Long-acting snow-melting agent based on modified zeolite slow-release matrix and preparation method thereof Download PDFInfo
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- 238000002844 melting Methods 0.000 title claims abstract description 119
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical class O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 72
- 239000011159 matrix material Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 230000008018 melting Effects 0.000 claims abstract description 55
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 32
- 239000010457 zeolite Substances 0.000 claims abstract description 32
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002893 slag Substances 0.000 claims abstract description 23
- 239000012190 activator Substances 0.000 claims abstract description 13
- 230000004048 modification Effects 0.000 claims abstract description 7
- 238000012986 modification Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 35
- 239000000243 solution Substances 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 21
- 238000005260 corrosion Methods 0.000 claims description 18
- 230000007797 corrosion Effects 0.000 claims description 18
- 230000005764 inhibitory process Effects 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 17
- 239000007787 solid Substances 0.000 claims description 16
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 235000019353 potassium silicate Nutrition 0.000 claims description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 239000001110 calcium chloride Substances 0.000 claims description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 6
- 239000011780 sodium chloride Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 5
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 239000012047 saturated solution Substances 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 239000001488 sodium phosphate Substances 0.000 claims description 5
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 5
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 5
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 4
- 239000000176 sodium gluconate Substances 0.000 claims description 4
- 235000012207 sodium gluconate Nutrition 0.000 claims description 4
- 229940005574 sodium gluconate Drugs 0.000 claims description 4
- 239000003112 inhibitor Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 abstract description 13
- 239000003513 alkali Substances 0.000 abstract description 6
- 238000003860 storage Methods 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 239000010426 asphalt Substances 0.000 abstract description 2
- 230000005284 excitation Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
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- 239000012153 distilled water Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000000967 suction filtration Methods 0.000 description 3
- 238000003828 vacuum filtration Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
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- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- -1 hydrochloric acid modified zeolite Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000005413 snowmelt Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/18—Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
- C09K3/185—Thawing materials
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
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- Combustion & Propulsion (AREA)
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- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Abstract
The invention provides a long-acting snow-melting agent based on a modified zeolite slow-release matrix and a preparation method thereof, wherein the long-acting snow-melting agent comprises the following components in percentage by mass: modified zeolite snow melting slow release carrier: alkali-activator solution: pore-forming agent: water = 100: 50-150: 10-20: 1 to 5:0 to 10; the preparation method comprises the steps of high-temperature compound modification of zeolite hydrochloric acid, preparation of modified zeolite snow-melting slow release carrier, and slag alkali-activated porous coating solidification treatment. After the modified zeolite is subjected to hydrochloric acid and high-temperature composite treatment, non-structural substances in the internal pore canal are dissolved, the volume of the pore canal is increased, the resistance of the pore canal is reduced, the modified zeolite has better adsorption and loading capacity of snow melting components, and simultaneously, the snow melting carrier is solidified by utilizing an alkali excitation mode, so that the stability of releasing the snow melting components is further improved, and the modified zeolite has important practical significance for the long-acting snow melting function of the salt-storage asphalt pavement.
Description
Technical Field
The invention belongs to the field of road engineering, and in particular relates to a long-acting snow-melting agent based on a modified zeolite slow-release matrix and a preparation method thereof.
Background
In northern China and China, snow fall exists in winter, in northeast China, inner Mongolia and other areas, snow fall is large, air temperature is low, snow is difficult to melt, and snow on roads is easy to form a firm ice layer after vehicles repeatedly roll; in areas such as Hubei and Hunan, the environmental humidity is high, the snow is melted on the road surface in winter and then is directly frozen to form a thin ice layer, the adhesion coefficient of road surface driving is reduced, and after the traffic volume is increased in the early morning, traffic accidents are easy to occur, so that great inconvenience is caused to road transportation, production and life.
Aiming at the road traffic problem caused by snowfall and icing, the method of scattering ice salt or mechanically removing snow after snowfall is generally adopted to carry out passive snow melting at present, so that a large amount of manpower and material resources are consumed, and the influence on vehicle traffic in the snowfall and snow removing process cannot be avoided, so that the road active snow melting technology capable of inhibiting ice and snow in the snowfall process is an important development direction of road snow melting in the future. At present, researchers propose active snow melting technology for melting snow and ice on a road surface in an energy conversion mode, such as pre-buried conductive carbon fiber heating deicing, heat pipe laying deicing and other technical ideas, and better deicing effect can be really realized by inhibiting ice and snow on the road surface through energy conversion heating, but the mode has high construction cost, high maintenance cost and high energy consumption, has applicability only on part of important and special demand road sections, and is difficult to apply on a large scale; meanwhile, researchers also put forward to mix a snow-melting agent taking calcium chloride and sodium chloride as main components into a pavement material to form a salt-storage pavement, ice is continuously separated out by salt to lower the freezing point, and the purpose of active snow melting is achieved. However, the existing salt-storage type pavement material has the problems of limited salt accumulation and over-high dissolution speed, so that the salt-storage type pavement has good snow melting and ice inhibiting effects in the first 1-2 snowfall periods, and the later snow melting effects gradually decline, and therefore, how to realize long-acting slow release of the snow melting agent in the salt-storage type pavement is a technical bottleneck which needs to be broken through in the existing pavement active snow melting technology.
The invention breaks through the slow release method for wrapping the snow-melting agent carrier, provides a technical thought for modifying the natural zeolite pore structure, improves the pore structure characteristics of the zeolite carrier, increases pore space, improves pore connectivity and reduces pore load resistance, realizes that the zeolite carrier with unit mass can contain more snow-melting components, and prepares and forms the special road snow-melting agent with long-acting slow release characteristics.
Disclosure of Invention
Aiming at the problem of insufficient working long-acting performance of the snow-melting agent, the invention provides a long-acting snow-melting agent based on a modified zeolite slow-release matrix and a preparation method thereof.
The technical scheme adopted for solving the technical problems is as follows: a long-acting snow-melting agent based on modified zeolite slow-release matrix and a preparation method thereof, wherein the long-acting snow-melting agent comprises the following components in percentage by mass: modified zeolite snow melting slow release carrier: alkali-activator solution: pore-forming agent: water = 100: 50-150: 10-20: 1 to 5:0 to 10.
Further, the slag powder is obtained by grinding granulated blast furnace slag, and the specific surface area is 400m 2 /kg-600m 2 /kg。
Further, the particle size of the modified zeolite snow melting slow release carrier is less than or equal to 1.18mm; the modified zeolite snow-melting slow release carrier comprises the following components in percentage by mass: snow melting component: corrosion inhibition component = 100: 30-70: 2 to 9.
Further, the modified zeolite is obtained by modifying natural zeolite in a hydrochloric acid and high temperature compounding mode.
Further, the snow melting component comprises calcium chloride, sodium chloride and magnesium chloride according to the mass ratio of 2-3: 1: 1.
Further, the corrosion inhibition inhibitor is one or a mixture of two of sodium phosphate and sodium gluconate.
Further, the alkali-activator solution is water glass, and the modulus M=1-2 of the water glass.
Further, the pore-forming agent is aluminum powder.
The invention also provides a long-acting snow-melting agent based on the modified zeolite slow-release matrix and a preparation method thereof, comprising the following steps:
1) Modification treatment of natural zeolite
Preparing hydrochloric acid solution with pH value of 2-3, fully soaking natural zeolite therein, stirring in a stirrer at a stirring speed of 180-240 r/min for 5-6 min, filtering to obtain acid modified solid after stirring is completed, sending the solid obtained after filtering into a baking oven, and drying at a high temperature of 150-170 ℃ for 25-30 min to obtain modified zeolite;
2) Preparation of modified zeolite snow-melting slow-release carrier
Dissolving the snow melting component and the corrosion inhibition component in water to form a saturated solution, adding modified zeolite, ultrasonically stirring for 8-12 h, standing for 20-30 h, filtering, drying and grinding the mixed solution to obtain a modified zeolite snow melting slow release carrier;
3) Preparation of long-acting snow-melting agent
Mixing slag powder and modified zeolite snow-melting slow-release carrier, and placing the mixture into a disc granulator for stirring to form uniformly dispersed powder; sequentially adding pore-forming agent, water and alkali-activator solution, stirring and molding to obtain 1-2mm particles, and naturally curing the particles for more than 28 days to obtain the long-acting snow-melting agent.
The beneficial effects of the invention are as follows:
(1) After the natural zeolite is modified by hydrochloric acid, the pore size distribution and pore volume of the zeolite are obviously improved, the volumes of micropores, mesopores and macropores of the zeolite are increased, the zeolite modified by hydrochloric acid is modified at high temperature, water in crystals can be removed, the internal space is increased, and the capacity of the zeolite serving as a slow-release matrix for the snow melting component is greatly improved; meanwhile, the hydrochloric acid modified zeolite does not change the slit type pore canal type, so that the release rate of the zeolite serving as a slow release matrix for the snow melting component is not influenced while the porosity of the zeolite is increased. Compared with natural zeolite, the modified zeolite treated by acid is used as a carrier of the snow melting component, the modified zeolite has lower internal pore canal resistance, larger space and better pore canal connectivity, and the zeolite carrier with unit mass can contain more snow melting components, so that the long-acting performance of the snow melting agent is realized.
(2) According to the invention, a slag alkali excitation mode is adopted to wrap and solidify a modified zeolite snow melting slow release carrier, a snow melting agent is prepared into particles with the particle size of 1-2mm, the snow melting agent is added into a salt storage type asphalt pavement in a mode of replacing machine-made sand with an equal volume, the problem that the traditional powder snow melting agent is lost due to the action of moisture after being added in a mode of replacing mineral powder is avoided, and meanwhile, a snow melting component exudation channel formed by a pore-forming agent is effectively utilized, so that the slow release effect of the snow melting agent is further improved.
In conclusion, the invention combines a plurality of modes, effectively improves the containing amount of the slow-release matrix material to the snow-melting component, controls the release speed of the snow-melting component, and realizes the long-acting performance of the snow-melting agent on the premise of ensuring the working efficiency of the snow-melting component.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1:
a long-acting snow-melting agent based on a modified zeolite slow-release matrix comprises the following raw materials in parts by mass: modified zeolite snow melting slow release carrier: alkali-activator solution: pore-forming agent: water = 100:100:10:2:5.
the slag powder is obtained by grinding granulated blast furnace slag, and has a specific surface area of 450m 2 /kg。
The modified zeolite snow-melting slow release carrier has the particle size less than or equal to 1.18mm and comprises modified zeolite, a snow-melting component and a corrosion inhibition component according to the mass ratio of 100:40:5, preparing the product.
The modified zeolite is obtained by modifying natural zeolite in a hydrochloric acid and high temperature compounding mode, and the snow melting component comprises calcium chloride, sodium chloride and magnesium chloride according to a mass ratio of 2:1: the corrosion inhibition component is sodium phosphate. The alkali-activator solution is water glass, and the modulus M=1.8 of the water glass. The pore-forming agent is aluminum powder.
The preparation of the long-acting snow-melting agent based on the modified zeolite slow-release matrix comprises the following steps:
1) Modification treatment of natural zeolite
Preparing a sufficient amount of hydrochloric acid solution with pH=3, fully soaking natural zeolite therein, stirring in a stirrer at a stirring speed of 200r/min for 6min, performing vacuum filtration after stirring to obtain acid modified solid, placing the solid obtained after filtration in an oven, and drying at a high temperature of 150 ℃ for 30min to obtain modified zeolite.
2) Preparation of modified zeolite snow-melting slow-release carrier
The modified zeolite, the snow melting component and the corrosion inhibition component are respectively weighed according to the mass ratio, the snow melting component and the corrosion inhibition component are mixed and then dissolved in distilled water to form a saturated solution, the modified zeolite is added, the ultrasonic stirring is carried out for 10 hours, the mixture is left for 20 hours after the stirring is finished, the solid precipitate is obtained through suction filtration of the mixed solution after the standing, finally, the solid precipitate obtained through filtration is placed in an oven and is fully dried at 70 ℃, and the modified zeolite snow melting slow release carrier is obtained through grinding after the drying.
3) Slag alkali-activated porous coating solidification treatment
Weighing slag powder, modified zeolite snow-melting slow release carrier, alkali-exciting agent solution, pore-forming agent and water according to the mass ratio; mixing slag powder and modified zeolite snow-melting slow-release carrier, and placing the mixture into a disc granulator for stirring to form uniformly dispersed powder; sequentially and slowly adding the pore-forming agent, water and alkali-exciting agent solution, stirring and forming to obtain particles with the diameter of 1-2mm, and naturally curing the particles for 28 days to obtain the long-acting snow-melting agent.
Example 2:
a long-acting snow-melting agent based on a modified zeolite slow-release matrix comprises the following raw materials in parts by mass: modified zeolite snow melting slow release carrier: alkali-activator solution: pore-forming agent: water = 100:50:15:5:2.
the slag powder is obtained by grinding granulated blast furnace slag, and has a specific surface area of 450m 2 /kg。
The modified zeolite snow-melting slow release carrier has the particle size less than or equal to 1.18mm and comprises modified zeolite, a snow-melting component and a corrosion inhibition component according to the mass ratio of 100:50: 7.
The modified zeolite is obtained by modifying natural zeolite in a hydrochloric acid and high temperature compounding mode, and the snow melting component comprises calcium chloride, sodium chloride and magnesium chloride according to the mass ratio of 3:1: the corrosion inhibition component is prepared by mixing sodium phosphate and sodium gluconate according to a mass ratio of 1:1.
The alkali-activator solution is water glass, and the modulus M=1.8 of the water glass. The pore-forming agent is aluminum powder.
The preparation of the long-acting snow-melting agent based on the modified zeolite slow-release matrix comprises the following steps:
1) Modification treatment of natural zeolite
Preparing a sufficient amount of hydrochloric acid solution with pH=3, fully soaking natural zeolite therein, stirring in a stirrer at a stirring speed of 240r/min for 5min, performing vacuum filtration after stirring to obtain acid modified solid, placing the solid obtained after filtration in an oven, and drying at 160 ℃ for 25min to obtain modified zeolite.
2) Preparation of modified zeolite snow-melting slow-release carrier
The modified zeolite, the snow melting component and the corrosion inhibition component are respectively weighed according to the mass ratio, the snow melting component and the corrosion inhibition component are mixed and then dissolved in distilled water to form a saturated solution, the modified zeolite is added, the ultrasonic stirring is carried out for 8 hours, the mixture is left stand for 25 hours after the stirring is finished, the solid precipitate is obtained through suction filtration of the mixed solution after the standing, finally, the solid precipitate obtained through filtration is placed in an oven and is fully dried at 70 ℃, and the modified zeolite snow melting slow release carrier is obtained through grinding after the drying.
3) Slag alkali-activated porous coating solidification treatment
Weighing slag powder, modified zeolite snow-melting slow release carrier, alkali-exciting agent solution, pore-forming agent and water according to the mass ratio; mixing slag powder and modified zeolite snow-melting slow-release carrier, and placing the mixture into a disc granulator for stirring to form uniformly dispersed powder; sequentially and slowly adding the pore-forming agent, water and alkali-exciting agent solution, stirring and forming to obtain particles with the diameter of 1-2mm, and naturally curing the particles for 28 days to obtain the long-acting snow-melting agent.
Example 3:
a long-acting snow-melting agent based on a modified zeolite slow-release matrix comprises the following raw materials in parts by mass: modified zeolite snow melting slow release carrier: alkali-activator solution: pore-forming agent: water = 100:150:20:5:8.
the slag powder is obtained by grinding granulated blast furnace slag, and has a specific surface area of 500m 2 /kg。
The modified zeolite snow-melting slow release carrier has the particle size less than or equal to 1.18mm and comprises modified zeolite, a snow-melting component and a corrosion inhibition component according to the mass ratio of 100:70: 8.
The modified zeolite is obtained by modifying natural zeolite in a hydrochloric acid and high temperature compounding mode, and the snow melting component comprises calcium chloride, sodium chloride and magnesium chloride according to a mass ratio of 2:1: the corrosion inhibition component is prepared by mixing sodium phosphate and sodium gluconate according to a mass ratio of 3:1.
The alkali-activator solution is water glass, and the modulus M=1.8 of the water glass. The pore-forming agent is aluminum powder.
The preparation of the long-acting snow-melting agent based on the modified zeolite slow-release matrix comprises the following steps:
1) Modification treatment of natural zeolite
Preparing a sufficient amount of hydrochloric acid solution with pH=3, fully soaking natural zeolite therein, stirring in a stirrer at a stirring speed of 180r/min for 6min, performing vacuum filtration after stirring to obtain acid modified solid, placing the solid obtained after filtration in an oven, and drying at a high temperature of 150 ℃ for 30min to obtain modified zeolite.
2) Preparation of modified zeolite snow-melting slow-release carrier
The modified zeolite, the snow melting component and the corrosion inhibition component are respectively weighed according to the mass ratio, the snow melting component and the corrosion inhibition component are mixed and then dissolved in distilled water to form a saturated solution, the modified zeolite is added, the ultrasonic stirring is carried out for 12 hours, the mixture is left for 30 hours after the stirring is finished, the solid precipitate is obtained through suction filtration of the mixed solution after the standing, finally, the solid precipitate obtained through filtration is placed in an oven and is fully dried at 70 ℃, and the modified zeolite snow melting slow release carrier is obtained through grinding after the drying.
3) Slag alkali-activated porous coating solidification treatment
Weighing slag powder, modified zeolite snow-melting slow release carrier, alkali-exciting agent solution, pore-forming agent and water according to the mass ratio; mixing slag powder and modified zeolite snow-melting slow-release carrier, and placing the mixture into a disc granulator for stirring to form uniformly dispersed powder; sequentially and slowly adding the pore-forming agent, water and alkali-exciting agent solution, stirring and forming to obtain particles with the diameter of 1-2mm, and naturally curing the particles for 28 days to obtain the long-acting snow-melting agent.
Comparative example:
the comparative example uses natural zeolite as a slow release carrier, the natural zeolite is not modified, the zeolite loaded with the snow melt agent is not coated and cured, and other raw materials have the same composition and treatment method as in example 1.
The long-acting snow-melting agents prepared in the examples 1, 2 and 3 and the long-acting snow-melting agent prepared in the comparative example with the same mass are respectively placed in distilled water with the same volume, the system is placed in the environment of 0 ℃ for standing, and the chloride ion concentration of the solutions of 1h, 2h, 3h, 6h, 12h and 24h is respectively measured, and a stirring rod is used for slightly stirring before each measurement.
TABLE 1 concentration of chloride ions in the solutions of the systems after various times
The results show that the chloride ion concentration increasing rate in the examples is slightly lower than that in the comparative examples, and the peak concentration is obviously higher than that in the comparative examples, so that the modified zeolite is adopted as a slow release carrier, and the snow melting effect and long-term performance of the snow melting agent can be better improved on the basis of the natural zeolite.
The technical scheme of the invention is explained in the technical scheme, the protection scope of the invention cannot be limited by the technical scheme, and any changes and modifications to the technical scheme according to the technical substance of the invention belong to the protection scope of the technical scheme of the invention.
Claims (9)
1. A long-acting snow-melting agent based on a modified zeolite slow-release matrix is characterized in that: the slag powder comprises the following components in percentage by mass: modified zeolite snow melting slow release carrier: alkali-activator solution: pore-forming agent: water = 100: 50-150: 10-20: 1 to 5:0 to 10.
2. A long-acting snow-melting agent based on a modified zeolite slow-release matrix as claimed in claim 1, wherein: the specific surface area of the slag powder is 400m 2 /kg-600m 2 /kg。
3. A long-acting snow-melting agent based on a modified zeolite slow-release matrix as claimed in claim 1, wherein: the particle size of the modified zeolite snow melting slow release carrier is less than or equal to 1.18mm; the modified zeolite snow-melting slow release carrier comprises the following components in percentage by mass: snow melting component: corrosion inhibition component = 100: 30-70: 2 to 9.
4. A long-acting snow-melting agent based on a modified zeolite slow-release matrix as claimed in claim 1, wherein: the modified zeolite is obtained by modifying natural zeolite in a hydrochloric acid and high temperature compounding mode.
5. A long-acting snow-melting agent based on a modified zeolite slow-release matrix as claimed in claim 1, wherein: the snow melting component comprises calcium chloride, sodium chloride and magnesium chloride according to the mass ratio of 2-3: 1: 1.
6. A long-acting snow-melting agent based on a modified zeolite slow-release matrix as claimed in claim 1, wherein: the corrosion inhibition inhibitor is one or a mixture of two of sodium phosphate and sodium gluconate.
7. A long-acting snow-melting agent based on a modified zeolite slow-release matrix as claimed in claim 1, wherein: the alkali-activator solution is water glass, and the modulus M=1-2 of the water glass.
8. A long-acting snow-melting agent based on a modified zeolite slow-release matrix as claimed in claim 1, wherein: the pore-forming agent is aluminum powder.
9. A method for preparing the modified zeolite slow release matrix-based long-acting snow-melting agent according to any one of claims 1 to 8, which is characterized in that:
the method comprises the following steps:
1) Modification treatment of natural zeolite
Preparing hydrochloric acid solution with pH value of 2-3, fully soaking natural zeolite therein, stirring in a stirrer at a stirring speed of 180-240 r/min for 5-6 min, filtering to obtain acid modified solid after stirring is completed, sending the solid obtained after filtering into a baking oven, and drying at a high temperature of 150-170 ℃ for 25-30 min to obtain modified zeolite;
2) Preparation of modified zeolite snow-melting slow-release carrier
Dissolving the snow melting component and the corrosion inhibition component in water to form a saturated solution, adding modified zeolite, ultrasonically stirring for 8-12 h, standing for 20-30 h, filtering, drying and grinding the mixed solution to obtain a modified zeolite snow melting slow release carrier;
3) Preparation of long-acting snow-melting agent
Mixing slag powder and modified zeolite snow-melting slow-release carrier, and placing the mixture into a disc granulator for stirring to form uniformly dispersed powder; sequentially adding pore-forming agent, water and alkali-activator solution, stirring and molding to obtain 1-2mm particles, and naturally curing the particles for more than 28 days to obtain the long-acting snow-melting agent.
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