CN108455884B - Preparation method of steel slag with phase change latent heat - Google Patents
Preparation method of steel slag with phase change latent heat Download PDFInfo
- Publication number
- CN108455884B CN108455884B CN201810300412.5A CN201810300412A CN108455884B CN 108455884 B CN108455884 B CN 108455884B CN 201810300412 A CN201810300412 A CN 201810300412A CN 108455884 B CN108455884 B CN 108455884B
- Authority
- CN
- China
- Prior art keywords
- steel slag
- latent heat
- phase change
- change latent
- polyvinyl alcohol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 158
- 239000010959 steel Substances 0.000 title claims abstract description 158
- 239000002893 slag Substances 0.000 title claims abstract description 157
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 83
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 40
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 40
- 238000002791 soaking Methods 0.000 claims description 33
- 239000007864 aqueous solution Substances 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 20
- BDKLKNJTMLIAFE-UHFFFAOYSA-N 2-(3-fluorophenyl)-1,3-oxazole-4-carbaldehyde Chemical compound FC1=CC=CC(C=2OC=C(C=O)N=2)=C1 BDKLKNJTMLIAFE-UHFFFAOYSA-N 0.000 claims description 18
- QHFQAJHNDKBRBO-UHFFFAOYSA-L calcium chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Ca+2] QHFQAJHNDKBRBO-UHFFFAOYSA-L 0.000 claims description 18
- 235000017281 sodium acetate Nutrition 0.000 claims description 18
- 229940087562 sodium acetate trihydrate Drugs 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 14
- 238000006136 alcoholysis reaction Methods 0.000 claims description 12
- 238000006116 polymerization reaction Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 6
- 239000004567 concrete Substances 0.000 abstract description 35
- 239000004576 sand Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 7
- 230000000630 rising effect Effects 0.000 description 5
- 238000005336 cracking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
- C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a preparation method of steel slag with phase change latent heat, which belongs to the technical field of steel slag application, wherein the steel slag with phase change latent heat is obtained by preparing phase change latent heat steel slag A and phase change latent heat steel slag B for later use and uniformly mixing the phase change latent heat steel slag A and the phase change latent heat steel slag B according to the weight ratio of 1: 1-3. The phase change latent heat steel slag prepared by the method can be used for replacing sand and broken stones in the process of preparing concrete. The phase-change latent heat steel slag is used in the preparation process of concrete, so that the central temperature of the concrete can be continuously influenced after the concrete is hardened, and cracks can not be generated due to the fact that the central temperature breaks through the limit; in addition, the preparation method of the steel slag with the phase change latent heat has simple process, is convenient for mechanized operation, and is suitable for popularization and use.
Description
Technical Field
The invention belongs to the technical field of steel slag application, and particularly relates to a preparation method of steel slag with phase change latent heat.
Background
The steel yield in 2016 is 11.38 hundred million tons, the world is the first in 21 continuous years, and the steel slag yield in 2016 is about 2 million tons according to the calculation that the steel slag yield is 15-20% of crude steel. At present, the utilization rate of steel slag in China is only about 10%, the steel slag is used as solid waste with low utilization rate, the stacking of the steel slag brings serious environmental problems, occupies a large area of land, and brings great pressure to the sustainable development of social economy and ecological environment.
Along with the development of national economy, the requirement of the building on durability is higher and higher, and for reinforced concrete, cracking is the main cause of greatly reducing the service life of a component. Among the various risks of concrete cracking, temperature cracking is a common and relatively difficult to control crack. Due to excessive grinding of the cementing material and pursuit of early strength, early hydration heat release of the concrete mixture is increased, and hydration heat release peaks appear in advance, which all have adverse effects on the control of the concrete temperature cracks.
The probability of temperature cracks can be effectively reduced by means of adding ice or freezing aggregate and the like, but the water consumption is strictly limited in concrete mixture, so that the total amount of the added ice is low, the requirement of the freezing aggregate on equipment is high, the two modes can only control the mold-entering temperature of the concrete, and the temperature change after the concrete is formed cannot be interfered.
The phase change latent heat material has been widely applied in the fields of military affairs, aviation and the like, but the chemical property of the phase change latent heat material has great influence on the performance of concrete, so the phase change latent heat material cannot be added into the concrete as a component of the concrete.
The steel slag particles with low comprehensive utilization rate have the characteristics of high strength and internal porosity, and are suitable to be used as carriers of phase change latent heat storage materials.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a preparation method of steel slag with phase change latent heat, which has simple process and is convenient for mechanized operation.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of steel slag with phase change latent heat comprises the following steps:
1) heating and liquefying calcium chloride hexahydrate, immersing steel slag particles with the particle size range of 2-5 mm in the liquefied calcium chloride hexahydrate, preserving heat, taking out, and cooling to room temperature for later use;
2) preparing an aqueous solution by using polyvinyl alcohol, soaking the steel slag particles cooled in the step 1) in the prepared aqueous solution of polyvinyl alcohol at normal temperature, taking out the steel slag particles after soaking, and drying the steel slag particles at normal temperature to prepare phase-change latent heat steel slag A for later use;
3) heating and liquefying sodium acetate trihydrate, then immersing steel slag particles with the particle size range of 2-5 mm in the liquefied sodium acetate trihydrate, keeping the temperature, taking out the steel slag particles, and cooling the steel slag particles to room temperature for later use;
4) preparing an aqueous solution by using polyvinyl alcohol, soaking the steel slag particles cooled in the step 3) in the prepared aqueous solution of polyvinyl alcohol at normal temperature, taking out the steel slag particles after soaking, and drying the steel slag particles at normal temperature to prepare phase change latent heat steel slag B for later use;
5) uniformly mixing the phase change latent heat steel slag A prepared in the step 2) and the phase change latent heat steel slag B prepared in the step 4) according to the weight ratio of 1:1-3 to obtain the steel slag with phase change latent heat.
In the step 1) and the step 3), the steel slag particles are steel slag particles with qualified stability after hot-disintegration treatment.
In the step 1), heating calcium chloride hexahydrate to 40 ℃ for liquefaction, keeping the temperature at 40 ℃ and keeping the time at 2 hours.
The mass concentration of the polyvinyl alcohol aqueous solution in the step 2) and the step 4) is 5%.
In the step 3), heating the sodium acetate trihydrate to 70 ℃ for liquefaction, wherein the heat preservation temperature is 70 ℃ and the time is 2 hours.
The polymerization degree of the polyvinyl alcohol in the step 2) and the step 4) is 1700, the alcoholysis degree of the polyvinyl alcohol is 88 percent, or the polymerization degree of the polyvinyl alcohol is 1700, and the alcoholysis degree of the polyvinyl alcohol is 92 percent.
In the step 2) and the step 4), the soaking time is 20-40 minutes.
The invention principle is as follows: the phase-change latent heat steel slag is used in the preparation process of concrete, when the internal temperature of the concrete rises to about 30 ℃, calcium chloride hexahydrate undergoes phase change and absorbs more heat, so that the temperature rising rate inside the concrete is greatly reduced, and when the internal temperature of the concrete rises to about 60 ℃, sodium acetate trihydrate also plays a role in effectively reducing the rate of temperature rising inside the concrete, therefore, the heating of the phase-change latent heat material can effectively reduce the temperature difference between the center and the surface of the concrete in the concrete temperature rising stage. In the cooling stage, the phase-change latent heat material can also delay the cooling speed of the concrete and reduce the temperature cracks of the concrete caused by thermal vibration; the central temperature of the concrete can be continuously influenced after the concrete is hardened, so that the concrete cannot break through the limit to generate cracks; the polyvinyl alcohol can form a layer of protective film to separate the steel slag and the calcium chloride hexahydrate from the concrete and separate the steel slag and the sodium acetate trihydrate from the concrete, thereby effectively protecting the phase change latent heat material.
Has the advantages that: compared with the prior art, the phase change latent heat steel slag prepared by the method can be used for replacing sand and broken stones in the process of preparing concrete. The phase-change latent heat steel slag is used in the preparation process of concrete, so that the central temperature of the concrete can be continuously influenced after the concrete is hardened, and cracks can not be generated due to the fact that the central temperature breaks through the limit; in addition, the preparation method of the steel slag with the phase change latent heat has simple process, is convenient for mechanized operation, and is suitable for popularization and use.
Detailed Description
The present invention will be further described with reference to the following embodiments.
A preparation method of steel slag with phase change latent heat comprises the following steps:
1) heating and liquefying calcium chloride hexahydrate, immersing steel slag particles with the particle size range of 2-5 mm in the liquefied calcium chloride hexahydrate, preserving heat, taking out, and cooling to room temperature for later use;
2) preparing an aqueous solution by using polyvinyl alcohol, soaking the steel slag particles cooled in the step 1) in the prepared aqueous solution of polyvinyl alcohol at normal temperature, taking out the steel slag particles after soaking, and drying the steel slag particles at normal temperature to prepare phase-change latent heat steel slag A for later use;
3) heating and liquefying sodium acetate trihydrate, then immersing steel slag particles with the particle size range of 2-5 mm in the liquefied sodium acetate trihydrate, keeping the temperature, taking out the steel slag particles, and cooling the steel slag particles to room temperature for later use;
4) preparing an aqueous solution by using polyvinyl alcohol, soaking the steel slag particles cooled in the step 3) in the prepared aqueous solution of polyvinyl alcohol at normal temperature, taking out the steel slag particles after soaking, and drying the steel slag particles at normal temperature to prepare phase change latent heat steel slag B for later use;
5) uniformly mixing the phase change latent heat steel slag A prepared in the step 2) and the phase change latent heat steel slag B prepared in the step 4) according to the weight ratio of 1:1-3 to obtain the steel slag with phase change latent heat.
In the step 1) and the step 3), the steel slag particles are steel slag particles with qualified stability after hot-disintegration treatment.
In the step 1), heating calcium chloride hexahydrate to 40 ℃ for liquefaction, keeping the temperature at 40 ℃ and keeping the time at 2 hours.
The mass concentration of the polyvinyl alcohol aqueous solution in the step 2) and the step 4) is 5%.
In the step 3), heating the sodium acetate trihydrate to 70 ℃ for liquefaction, wherein the heat preservation temperature is 70 ℃ and the time is 2 hours.
The polymerization degree of the polyvinyl alcohol in the step 2) and the step 4) is 1700, the alcoholysis degree of the polyvinyl alcohol is 88 percent, or the polymerization degree of the polyvinyl alcohol is 1700, and the alcoholysis degree of the polyvinyl alcohol is 92 percent.
In the step 2) and the step 4), the soaking time is 20-40 minutes.
Example 1
A preparation method of steel slag with phase change latent heat comprises the following steps:
1) heating calcium chloride hexahydrate to 40 ℃ for liquefaction, then immersing steel slag particles with the particle size range of 2-5 mm in the liquefied calcium chloride hexahydrate, keeping the temperature at 40 ℃ for soaking for 2 hours, taking out, and cooling to room temperature for later use;
2) preparing an aqueous solution with the mass concentration of 5% by using polyvinyl alcohol with the polymerization degree of 1700 and the alcoholysis degree of 88%, soaking the steel slag particles cooled in the step 1) in the prepared aqueous solution of the polyvinyl alcohol at normal temperature, taking out the steel slag particles after 20-40 minutes of soaking, and airing the steel slag particles at normal temperature to prepare phase-change latent heat steel slag A for later use;
3) heating sodium acetate trihydrate to 70 ℃ for liquefaction, then immersing steel slag particles with the particle size range of 2-5 mm in the liquefied sodium acetate trihydrate, keeping the temperature at 70 ℃ for soaking for 2 hours, taking out the steel slag particles, and cooling the steel slag particles to room temperature for later use;
4) preparing an aqueous solution with the mass concentration of 5% by using polyvinyl alcohol with the polymerization degree of 1700 and the alcoholysis degree of 88%, soaking the steel slag particles cooled in the step 3) in the prepared aqueous solution of polyvinyl alcohol at normal temperature, taking out the steel slag particles after 20-40 minutes of soaking, and airing the steel slag particles at normal temperature to prepare phase change latent heat steel slag B for later use;
5) uniformly mixing the phase change latent heat steel slag A prepared in the step 2) and the phase change latent heat steel slag B prepared in the step 4) according to the weight ratio of 1:1 to prepare the steel slag with phase change latent heat.
The steel slag particles in the step 1) and the step 3) are steel slag particles with qualified stability after hot-disintegration treatment.
Example 2
A preparation method of steel slag with phase change latent heat comprises the following steps:
1) heating calcium chloride hexahydrate to 40 ℃ for liquefaction, then immersing steel slag particles with the particle size range of 2-5 mm in the liquefied calcium chloride hexahydrate, keeping the temperature at 40 ℃ for soaking for 2 hours, taking out, and cooling to room temperature for later use;
2) preparing an aqueous solution with the mass concentration of 5% by using polyvinyl alcohol with the polymerization degree of 1700 and the alcoholysis degree of 92%, soaking the steel slag particles cooled in the step 1) in the prepared aqueous solution of polyvinyl alcohol at normal temperature, taking out the steel slag particles after soaking for 20-40 minutes, and airing the steel slag particles at normal temperature to prepare phase change latent heat steel slag A for later use;
3) heating sodium acetate trihydrate to 70 ℃ for liquefaction, then immersing steel slag particles with the particle size range of 2-5 mm in the liquefied sodium acetate trihydrate, keeping the temperature at 70 ℃ for soaking for 2 hours, taking out the steel slag particles, and cooling the steel slag particles to room temperature for later use;
4) preparing an aqueous solution with the mass concentration of 5% by using polyvinyl alcohol with the polymerization degree of 1700 and the alcoholysis degree of 92%, soaking the steel slag particles cooled in the step 3) in the prepared aqueous solution of polyvinyl alcohol at normal temperature, taking out the steel slag particles after 20-40 minutes of soaking, and airing the steel slag particles at normal temperature to prepare phase change latent heat steel slag B for later use;
5) uniformly mixing the phase change latent heat steel slag A prepared in the step 2) and the phase change latent heat steel slag B prepared in the step 4) according to the weight ratio of 1:2 to prepare the steel slag with phase change latent heat.
The steel slag particles in the step 1) and the step 3) are steel slag particles with qualified stability after hot-disintegration treatment.
Example 3
A preparation method of steel slag with phase change latent heat comprises the following steps:
1) heating calcium chloride hexahydrate to 40 ℃ for liquefaction, then immersing steel slag particles with the particle size of 3 mm in the liquefied calcium chloride hexahydrate, keeping the temperature at 40 ℃ for soaking for 2 hours, taking out, and cooling to room temperature for later use;
2) preparing an aqueous solution with the mass concentration of 5% by using polyvinyl alcohol with the polymerization degree of 1700 and the alcoholysis degree of 88%, soaking the steel slag particles cooled in the step 1) in the prepared aqueous solution of polyvinyl alcohol at normal temperature, taking out the steel slag particles after soaking for 30 minutes, and airing the steel slag particles at normal temperature to prepare phase change latent heat steel slag A for later use;
3) heating sodium acetate trihydrate to 70 ℃ for liquefaction, then immersing steel slag particles with the particle size of 3 mm in the liquefied sodium acetate trihydrate, keeping the temperature at 70 ℃ for soaking for 2 hours, taking out, and cooling to room temperature for later use;
4) preparing an aqueous solution with the mass concentration of 5% by using polyvinyl alcohol with the polymerization degree of 1700 and the alcoholysis degree of 88%, soaking the steel slag particles cooled in the step 3) in the prepared aqueous solution of polyvinyl alcohol at normal temperature, taking out the steel slag particles after soaking for 30 minutes, and airing the steel slag particles at normal temperature to prepare phase change latent heat steel slag B for later use;
5) uniformly mixing the phase change latent heat steel slag A prepared in the step 2) and the phase change latent heat steel slag B prepared in the step 4) according to the weight ratio of 1:2 to prepare the steel slag with phase change latent heat.
The steel slag particles in the step 1) and the step 3) are steel slag particles with qualified stability after hot-disintegration treatment.
The temperature control performance of the phase-change latent heat steel slag and the common steel slag is compared according to the following experimental method:
respectively filling the prepared phase-change latent heat steel slag aggregate and the ordinary steel slag aggregate into a cylindrical container, putting a metal sleeve in the process of filling the aggregate so as to put a probe of a temperature recorder (the probe is required to be put at the center of the container and has the same distance from the upper surface to the lower surface), measuring the internal temperature, putting the container into an oven for step heating after a sample is filled, testing the temperature of the phase-change latent heat steel slag aggregate and the ordinary steel slag aggregate, and calculating the maximum temperature difference between the two.
The experimental results of temperature difference of the phase change latent heat steel slag prepared by the above three examples are shown in table 1.
TABLE 1 maximum temperature difference of each stage of phase change latent heat steel slag prepared in examples 1-3
As can be seen from Table 1, under the same experimental conditions, the temperature of the steel slag aggregate with latent heat of phase change in the temperature rising stage is 3.1 ℃ lower than that of the common steel slag aggregate at the maximum, and the temperature of the steel slag aggregate with latent heat of phase change in the temperature lowering stage is 2.0 ℃ higher than that of the common steel slag aggregate at the maximum. In addition, the temperature monitoring process can also find that the common steel slag aggregate reaches the preset temperature firstly and the phase-change latent heat steel slag aggregate reaches the preset temperature later in the temperature rising process; in the process of temperature reduction, similar to the process of temperature rise, the temperature of the phase-change latent heat steel slag aggregate reaches the preset temperature after being compared with the ordinary steel slag aggregate. The synergistic heat absorption and release effect of the calcium chloride hexahydrate and the sodium acetate trihydrate phase-change material is demonstrated to slow down the temperature rise and fall rate of the phase-change latent heat steel slag aggregate, so that the phase-change latent heat steel slag aggregate prepared by the invention has an obvious heat storage effect, if the phase-change latent heat steel slag aggregate is applied to concrete instead of common steel slag aggregate, the central temperature peak value of the concrete can be smaller than expected, the temperature stress of the concrete is reduced, and the possibility of generating cracks in the concrete is reduced.
Claims (5)
1. A preparation method of steel slag with phase change latent heat is characterized by comprising the following steps: the method comprises the following steps:
1) heating and liquefying calcium chloride hexahydrate, immersing steel slag particles with the particle size range of 2-5 mm in the liquefied calcium chloride hexahydrate, preserving heat, taking out, and cooling to room temperature for later use; in the step 1), heating calcium chloride hexahydrate to 40 ℃ for liquefaction, keeping the temperature at 40 ℃ for 2 hours;
2) preparing an aqueous solution by using polyvinyl alcohol, soaking the steel slag particles cooled in the step 1) in the prepared aqueous solution of polyvinyl alcohol at normal temperature, taking out the steel slag particles after soaking, and drying the steel slag particles at normal temperature to prepare phase-change latent heat steel slag A for later use;
3) heating and liquefying sodium acetate trihydrate, then immersing steel slag particles with the particle size range of 2-5 mm in the liquefied sodium acetate trihydrate, keeping the temperature, taking out the steel slag particles, and cooling the steel slag particles to room temperature for later use; in the step 3), heating sodium acetate trihydrate to 70 ℃ for liquefaction, keeping the temperature at 70 ℃ and keeping the time for 2 hours;
4) preparing an aqueous solution by using polyvinyl alcohol, soaking the steel slag particles cooled in the step 3) in the prepared aqueous solution of polyvinyl alcohol at normal temperature, taking out the steel slag particles after soaking, and drying the steel slag particles at normal temperature to prepare phase change latent heat steel slag B for later use;
5) uniformly mixing the phase change latent heat steel slag A prepared in the step 2) and the phase change latent heat steel slag B prepared in the step 4) according to the weight ratio of 1:1-3 to obtain the steel slag with phase change latent heat.
2. The method for preparing steel slag with latent heat of phase change according to claim 1, wherein the method comprises the following steps: in the step 1), the steel slag particles are steel slag particles with qualified stability after hot-disintegration treatment.
3. The method for preparing steel slag with latent heat of phase change according to claim 1, wherein the method comprises the following steps: the mass concentration of the polyvinyl alcohol aqueous solution in the step 2) and the step 4) is 5%.
4. The method for preparing steel slag with latent heat of phase change according to claim 1, wherein the method comprises the following steps: the polymerization degree of the polyvinyl alcohol in the step 2) and the step 4) is 1700, the alcoholysis degree of the polyvinyl alcohol is 88 percent, or the polymerization degree of the polyvinyl alcohol is 1700, and the alcoholysis degree of the polyvinyl alcohol is 92 percent.
5. The method for preparing steel slag with latent heat of phase change according to claim 1, wherein the method comprises the following steps: in the step 2) and the step 4), the soaking time is 20-40 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810300412.5A CN108455884B (en) | 2018-04-04 | 2018-04-04 | Preparation method of steel slag with phase change latent heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810300412.5A CN108455884B (en) | 2018-04-04 | 2018-04-04 | Preparation method of steel slag with phase change latent heat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108455884A CN108455884A (en) | 2018-08-28 |
| CN108455884B true CN108455884B (en) | 2020-08-04 |
Family
ID=63235114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810300412.5A Active CN108455884B (en) | 2018-04-04 | 2018-04-04 | Preparation method of steel slag with phase change latent heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108455884B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113930220A (en) * | 2021-11-24 | 2022-01-14 | 华中科技大学 | Steel slag-based binary composite phase change material capable of melting snow and removing ice and preparation method thereof |
| CN113979672A (en) * | 2021-11-24 | 2022-01-28 | 华中科技大学 | Steel slag-based phase-change asphalt concrete capable of melting snow and removing ice and preparation method thereof |
| CN116535122A (en) * | 2023-05-12 | 2023-08-04 | 辽宁天宝华瑞建材有限公司 | Grinding and activating method for steel slag and steel slag grinding-assisting activating agent |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061403A (en) * | 2010-10-28 | 2011-05-18 | 华南理工大学 | Porous material matrix and composite phase-change heat storage material and preparation methods thereof |
| CN102765959B (en) * | 2011-05-05 | 2015-09-02 | 江海红 | A kind of Energy storage energy-efficient foam gypsum cement composite material and preparation method thereof |
| WO2013123428A1 (en) * | 2012-02-17 | 2013-08-22 | The Regents Of The University Of California | Compositions comprising phase change material and concrete and uses thereof |
| CN103509529B (en) * | 2013-09-29 | 2016-01-20 | 浙江工业大学 | A kind of Phase-change ceramic grain and preparation method thereof |
| CN104119838A (en) * | 2014-06-30 | 2014-10-29 | 济南大学 | Phase change energy storage element and preparation method thereof |
| CN104649632A (en) * | 2015-01-20 | 2015-05-27 | 建筑材料工业技术监督研究中心 | Phase-change energy-storage temperature-regulation foam concrete and preparation method thereof |
| CN106318330A (en) * | 2016-08-22 | 2017-01-11 | 中国科学院青海盐湖研究所 | Preparation method of phase-change energy storage material and phase-change energy storage material |
-
2018
- 2018-04-04 CN CN201810300412.5A patent/CN108455884B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108455884A (en) | 2018-08-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108455884B (en) | Preparation method of steel slag with phase change latent heat | |
| CN112062598B (en) | Solid waste prepared ultra-light ceramsite and preparation method thereof | |
| CN103553478A (en) | Insulation masonry mortar for aerated concrete self-insulation building blocks in severe cold area and production method of insulation masonry mortar | |
| CN111003981A (en) | High-strength anti-permeability anti-freezing concrete and preparation method thereof | |
| CN103497740B (en) | Antifreeze fluid by taking composite corrosion inhibitor as main raw material | |
| CN115043624B (en) | Corrosion-resistant mass concrete and preparation method thereof | |
| CN108529992A (en) | A kind of high-Miller-index surface and preparation method thereof | |
| CN102127453B (en) | Chemical sand fixing agent and preparation method thereof | |
| CN107117944B (en) | Tundish composite magnesium-calcium coating for clean steel and preparation method thereof | |
| CN109928665A (en) | A kind of concrete admixture | |
| CN103553699B (en) | Method for preparing foam heat-insulating material from barren coal gangue industrial waste | |
| CN113666685A (en) | Low-hydration-heat high-heat-conductivity radiation-proof concrete and preparation method thereof | |
| CN109593514B (en) | Asphalt sealant and preparation method thereof | |
| CN111517820A (en) | High-strength ceramsite containing sludge ash and preparation method thereof | |
| CN106007566A (en) | Antifreezing anti-cracking thermal insulation mortar containing rice hull powder and preparation method thereof | |
| CN104910891A (en) | Low-density ceramic fracturing propping agent and preparation method thereof | |
| CN115677377B (en) | Preparation method of tailing-based porous ceramic material | |
| Rong et al. | Strength and microscopic damage mechanism of yellow sandstone with holes under freezing and thawing | |
| Ma et al. | Performance of RAP in the system of cold inplace recycling of asphalt pavement | |
| CN110922078B (en) | Method for improving quality of recycled coarse aggregate by adopting sulfate erosion-freeze thawing cycle | |
| CN111410196B (en) | Porous SiC material, preparation method thereof and phase change energy storage material | |
| CN113337269A (en) | Energy-saving efficiency-improving preparation method of solid waste base sintering proppant | |
| CN113603419A (en) | Phase change energy storage mortar suitable for cold region engineering and preparation method thereof | |
| CN113354364A (en) | Method for manufacturing anti-freezing concrete | |
| CN113461353A (en) | Method for quickly separating recycled coarse aggregate mortar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |