CN113896480A - Tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material and preparation method thereof - Google Patents
Tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material and preparation method thereof Download PDFInfo
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- CN113896480A CN113896480A CN202111316619.XA CN202111316619A CN113896480A CN 113896480 A CN113896480 A CN 113896480A CN 202111316619 A CN202111316619 A CN 202111316619A CN 113896480 A CN113896480 A CN 113896480A
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- China
- Prior art keywords
- cement
- steel slag
- slag powder
- tailing sand
- composite material
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Classifications
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- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- 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
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
Abstract
The invention relates to a tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material and a preparation method thereof, wherein the composite material comprises aggregate, cement and water, the mass ratio of the aggregate to the cement to the water is 2:1:0.55, 2.5:1:0.55 or 3:1:0.55, the aggregate comprises steel slag powder and tailing sand, and the mass ratio of the steel slag powder to the tailing sand is 0.4:1, 0.6:1 or 0.8: 1. The composite material has excellent heat-conducting property, and can recycle steel slag powder discarded by a steel plant and tailing sand discarded in mining, so that technical theoretical support is provided for the design of the high-heat-conducting composite material.
Description
Technical Field
The invention relates to the field of multifunctional building materials, in particular to a tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material and a preparation method thereof.
Background
At present, a large amount of tailing sand is generated by development and utilization of mineral resources, and China has few and few land resources directly utilized as a tailing pond and can only build the tailing pond to accumulate the tailing sand. Once the tailings pond breaks the dam, the life and property safety of nearby residents can be threatened to a great extent. In addition, steel plants generate a lot of waste steel slag in accordance with their normal operation, and it is very difficult to select a place for accumulating the waste steel slag. Because the tailing sand and the steel slag contain a large amount of metal components, how to utilize the two waste materials is a scientific problem to be solved urgently.
Many researchers have made many researches on recycling of the two materials, but few researches are made on the heat-conducting filler of the well wall of the middle-deep geothermal well. Firstly, preparing cement slurry by using cement, then preparing a tailing sand-steel slag powder aggregate mixture by using the tailing sand and the steel slag powder according to a certain proportion, then premixing the aggregate mixture, adding the cement slurry for uniform stirring, finally filling the mixture into a test mold for standard curing and forming to obtain the tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material, and providing technical theoretical support for the design of the high-thermal-conductivity composite material in actual engineering.
Disclosure of Invention
The technical problem to be solved is as follows: aiming at the defects in the prior art, the invention provides a tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material and a preparation method thereof, the composite material has excellent thermal conductivity, the composite material recycles the steel slag powder discarded by a steel mill and the tailing sand discarded in mining, and the result provides technical theoretical support for the design of the high-thermal-conductivity composite material.
The technical scheme is as follows: the tailing sand-steel slag powder-cement-based high-heat-conductivity composite material consists of aggregate, cement and water, wherein the mass ratio of the aggregate to the cement to the water is 2:1:0.55, 2.5:1:0.55 or 3:1:0.55, the aggregate consists of steel slag powder and tailing sand, and the mass ratio of the steel slag powder to the tailing sand is 0.4:1, 0.6:1 or 0.8: 1.
The steel slag powder is first-grade 200-mesh 300-mesh steel slag powder.
The cement is ordinary portland cement with the reference number of P.O 42.5.5.
The preparation method of the tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material comprises the following preparation steps:
(1) fully soaking the steel slag powder and the tailing sand with water to a saturated state, and then mixing and stirring uniformly to obtain aggregate;
(2) mixing water and cement, and uniformly stirring to obtain cement paste;
(3) mixing and stirring the aggregate and the cement paste uniformly to obtain a mixed material, placing the mixed material in a test mold, numbering and then placing the mixed material in a curing box;
(4) and demolding the mixed material after curing for 3 days, and continuously putting the mixed material into a curing box to the age of 28 days to obtain the tailing sand-steel slag powder-cement-based high-heat-conductivity composite material.
The stirring machine adopted for stirring is an M14-2 type cement stirring machine, the curing box is a SHBY-90B standard curing box, and the size of the test mould is phi 100mm multiplied by 50 mm.
The curing temperature is 20 +/-3 ℃, and the relative humidity is more than 90%.
Has the advantages that: the tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material and the preparation method thereof have the following beneficial effects:
1. the composite material has excellent heat-conducting property;
2. the invention firstly considers the recovery and utilization of the steel slag powder discarded by the steel plant and the tailing sand discarded in the mining process to prepare the high-heat-conductivity composite material, and consequently, the invention provides technical theoretical support for the design of the high-heat-conductivity composite material, saves the cost and protects the ecological environment.
Detailed Description
The tailings sand in the following examples was taken from the iron tailings sand of the Sedan Steel mining group, Midamask, Hainan, Liaoning province, and had a density of 1.6g/cm3The mineral composition is shown in table 1 below.
TABLE 1
The steel slag powder is first-grade 200-mesh 300-mesh steel slag powderThe density of the steel slag powder is 2.4g/cm3The mineral composition is shown in table 2 below.
TABLE 2
The cement is ordinary portland cement, reference P.O 42.5.5.
The preparation method of the tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material adopted in the following embodiment comprises the following preparation steps:
(1) fully soaking the steel slag powder and the tailing sand with water to a saturated state, and then mixing and stirring uniformly to obtain aggregate;
(2) mixing water and cement, and uniformly stirring to obtain cement paste;
(3) mixing and stirring the aggregate and the cement paste uniformly to obtain a mixed material, placing the mixed material in a test mold, numbering and then placing the mixed material in a curing box;
(4) demoulding the mixed material after three days of maintenance, and continuously putting the mixed material into a maintenance box to 28 days of age to obtain the tailing sand-steel slag powder-cement-based high-heat-conductivity composite material.
The stirrer used for stirring is an M14-2 type cement stirrer, the curing box is a SHBY-90B standard curing box, and the size of the test mould is phi 100mm multiplied by 50 mm; the curing temperature is 20 +/-3 ℃, and the relative humidity is more than 90%.
Example 1
The tests of example 1 were verified using aggregate, cement and water in a mass ratio of 2:1:0.55 and steel slag powder and tailings sand in mass ratios of 0.4:1, 0.6:1 and 0.8:1, respectively.
Weighing 488.95g of water, 889g of cement, 508g of steel slag powder and 1270g of tailing sand, wherein the number is 1;
weighing 488.95g of water, 889g of cement, 667g of steel slag powder and 1111g of tailing sand, and numbering 2;
weighing 488.95g of water, 889g of cement, 790g of steel slag powder and 988g of tailing sand, wherein the number is 3;
a set of control samples containing only cement was made, numbered 0.
The composite materials numbered 1, 2 and 3 were prepared by the above preparation methods, respectively, and the thermal conductivity of these composite materials and the control group numbered 0 were measured, and the test results are shown in table 3 below.
TABLE 3
| Test number | Aggregate cement | Slag powder, tailings sand | Thermal conductivity [ W/(m. K)] |
| 1 | 2:1 | 0.4:1 | 3.063 |
| 2 | 2:1 | 0.6:1 | 3.105 |
| 3 | 2:1 | 0.8:1 | 3.011 |
| 0 | 0:1 | 0:0 | 0.358 |
Example 2
The tests of example 2 were verified using aggregate, cement and water in a mass ratio of 2.5:1:0.55 and steel slag powder and tailings sand in mass ratios of 0.4:1, 0.6:1 and 0.8:1, respectively.
Weighing 419.1g of water, 762g of cement, 544g of steel slag powder and 1361g of tailing sand, wherein the number is 4;
weighing 419.1g of water, 762g of cement, 714g of steel slag powder and 1191g of tailing sand, and numbering 5;
419.1g of water, 762g of cement, 847g of steel slag powder and 1058g of tailing sand are weighed, and the serial number is 6.
The composite materials numbered 4, 5 and 6, which were prepared by the above preparation methods, respectively, were tested for thermal conductivity with the control group numbered 0, and the test results are shown in table 4 below.
TABLE 4
| Test number | Aggregate cement | Slag powder, tailings sand | Thermal conductivity [ W/(m. K)] |
| 4 | 2.5:1 | 0.4:1 | 3.088 |
| 5 | 2.5:1 | 0.6:1 | 3.124 |
| 6 | 2.5:1 | 0.8:1 | 3.025 |
| 0 | 0:1 | 0:0 | 0.358 |
Example 3
The tests of example 3 were verified using aggregates, cement and water in a mass ratio of 3:1:0.55 and steel slag powder and tailings sand in mass ratios of 0.4:1, 0.6:1 and 0.8:1, respectively.
Weighing 366.85g of water, 667g of cement, 571g of steel slag powder and 1429g of tailing sand, wherein the number is 7;
weighing 366.85g of water, 667g of cement, 750g of steel slag powder and 1250g of tailing sand, wherein the serial number is 8;
366.85g of water, 667g of cement, 889g of steel slag powder and 1111g of tailing sand are weighed, and the number is 9.
The composite materials numbered 7, 8 and 9, which were prepared by the above preparation methods, respectively, were tested for thermal conductivity with the control group numbered 0, and the test results are shown in table 5 below.
TABLE 5
| Test number | Aggregate cement | Slag powder, tailings sand | Thermal conductivity [ W/(m. K)] |
| 7 | 3:1 | 0.4:1 | 3.088 |
| 8 | 3:1 | 0.6:1 | 3.124 |
| 9 | 3:1 | 0.8:1 | 3.025 |
| 0 | 0:1 | 0:0 | 0.358 |
As can be seen from the results of examples 1-3 above and the results of the control group: according to the tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material, the thermal conductivity is improved by optimizing the raw material formula and the preparation method of the tailing sand and the steel slag powder.
Compared with a control group of single cement, the composite material prepared in the example 1 has the advantages that the thermal conductivity is respectively improved by 8.556 times, 8.673 times and 8.411 times; compared with a control group of single cement, the composite material prepared in the example 2 has thermal conductivity coefficient respectively improved by 8.626 times, 8.726 times and 8.450 times; the composite prepared in example 3 has improved thermal conductivity by 8.531 times, 8.654 times and 8.385 times, respectively, compared to the control group of single cement.
From this, it is understood that the composite material prepared at the mixing ratio of 2.5:1 aggregate to cement and 0.6:1 slag powder to tailing sand has the greatest improvement in thermal conductivity, and the thermal conductivity is improved 8.726 times as compared with the control group of single cement, so that the composite material prepared at this ratio is most preferable.
While the embodiments of the present invention have been described in detail, those skilled in the art will recognize that the embodiments of the present invention can be practiced without departing from the spirit and scope of the claims.
Claims (6)
1. A tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material is characterized in that: the composite material comprises aggregate, cement and water, wherein the mass ratio of the aggregate to the cement to the water is 2:1:0.55, 2.5:1:0.55 or 3:1:0.55, the aggregate comprises steel slag powder and tailing sand, and the mass ratio of the steel slag powder to the tailing sand is 0.4:1, 0.6:1 or 0.8: 1.
2. The tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material as claimed in claim 1, wherein: the steel slag powder is first-grade 200-mesh 300-mesh steel slag powder.
3. The tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material as claimed in claim 1, wherein: the cement is ordinary portland cement with the reference number of P.O 42.5.5.
4. The preparation method of the tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material as claimed in claim 1, is characterized by comprising the following preparation steps:
(1) fully soaking the steel slag powder and the tailing sand with water to a saturated state, and then mixing and stirring uniformly to obtain aggregate;
(2) mixing water and cement, and uniformly stirring to obtain cement paste;
(3) mixing and stirring the aggregate and the cement paste uniformly to obtain a mixed material, placing the mixed material in a test mold, numbering and then placing the mixed material in a curing box;
(4) and demolding the mixed material after curing for 3 days, and continuously putting the mixed material into a curing box to the age of 28 days to obtain the tailing sand-steel slag powder-cement-based high-heat-conductivity composite material.
5. The preparation method of the tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material as claimed in claim 4, is characterized in that: the stirring machine adopted for stirring is an M14-2 type cement stirring machine, the curing box is a SHBY-90B standard curing box, and the size of the test mould is phi 100mm multiplied by 50 mm.
6. The preparation method of the tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material as claimed in claim 4, is characterized in that: the curing temperature is 20 +/-3 ℃, and the relative humidity is more than 90%.
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| CN202111316619.XA CN113896480A (en) | 2021-11-08 | 2021-11-08 | Tailing sand-steel slag powder-cement-based high-thermal-conductivity composite material and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060288912A1 (en) * | 2002-12-24 | 2006-12-28 | Henghu Sun | Two-component wet cement, process and application thereof |
| CN103342481A (en) * | 2013-07-08 | 2013-10-09 | 武汉理工大学 | Mine filling cementing material slurry and preparation method thereof |
| CN107963850A (en) * | 2017-09-14 | 2018-04-27 | 杨智航 | A kind of cracking resistance high heat conduction mortar and its preparation method and application |
| CN111187045A (en) * | 2020-01-13 | 2020-05-22 | 安徽工业大学 | Mine underground filling mortar prepared from steel slag sand and mineral processing waste |
-
2021
- 2021-11-08 CN CN202111316619.XA patent/CN113896480A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060288912A1 (en) * | 2002-12-24 | 2006-12-28 | Henghu Sun | Two-component wet cement, process and application thereof |
| CN103342481A (en) * | 2013-07-08 | 2013-10-09 | 武汉理工大学 | Mine filling cementing material slurry and preparation method thereof |
| CN107963850A (en) * | 2017-09-14 | 2018-04-27 | 杨智航 | A kind of cracking resistance high heat conduction mortar and its preparation method and application |
| CN111187045A (en) * | 2020-01-13 | 2020-05-22 | 安徽工业大学 | Mine underground filling mortar prepared from steel slag sand and mineral processing waste |
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Application publication date: 20220107 |