CN114349426A - Phase-change modified lead-zinc slag wheel guard belt repairing material and preparation method thereof - Google Patents
Phase-change modified lead-zinc slag wheel guard belt repairing material and preparation method thereof Download PDFInfo
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- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical class [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 239000002893 slag Substances 0.000 title claims abstract description 72
- 239000000463 material Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 42
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 39
- 230000008859 change Effects 0.000 claims abstract description 28
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 20
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 20
- 230000004048 modification Effects 0.000 claims abstract description 20
- 238000012986 modification Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 239000002131 composite material Substances 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 14
- 230000000996 additive effect Effects 0.000 claims abstract description 13
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 13
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 12
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 10
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000008439 repair process Effects 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 16
- 239000004568 cement Substances 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 12
- 239000004576 sand Substances 0.000 claims description 11
- 239000011325 microbead Substances 0.000 claims description 10
- 239000002518 antifoaming agent Substances 0.000 claims description 9
- 238000000498 ball milling Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 2
- 230000009477 glass transition Effects 0.000 claims description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 229910020218 Pb—Zn Inorganic materials 0.000 claims 1
- 238000003837 high-temperature calcination Methods 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 5
- 239000000378 calcium silicate Substances 0.000 abstract description 4
- 229910052918 calcium silicate Inorganic materials 0.000 abstract description 4
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 229910052604 silicate mineral Inorganic materials 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 abstract 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract 1
- 239000000920 calcium hydroxide Substances 0.000 abstract 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract 1
- 238000005336 cracking Methods 0.000 abstract 1
- 238000006703 hydration reaction Methods 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 238000002156 mixing Methods 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 239000002956 ash Substances 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000004816 latex Substances 0.000 description 3
- 229920000126 latex Polymers 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910000004 White lead Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 description 1
- 229940105847 calamine Drugs 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910002026 crystalline silica Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910052864 hemimorphite Inorganic materials 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 229910003480 inorganic solid Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical compound [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
- CPYIZQLXMGRKSW-UHFFFAOYSA-N zinc;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Fe+3].[Fe+3].[Zn+2] CPYIZQLXMGRKSW-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a wheel-protecting belt repairing material based on phase change modified lead-zinc slag and a preparation method thereof, wherein 0.5-10.0 wt% of Na is doped into 80-150-mesh lead-zinc slag2CO3Powder is subjected to phase change modification at the temperature of 650-900 ℃, silicon dioxide in lead-zinc slag is modified from crystalline state to amorphous state, so that the silicon dioxide has excellent reaction activity and can be subjected to hydration reaction with calcium hydroxide, and part of ultrafine silicate minerals in the lead-zinc slag as microaggregate have better binding performance with calcium silicate hydrate, so that the strength of the wheel guard band repairing material can be greatly improved; meanwhile, the defect of insufficient silicon dioxide content in lead-zinc slag is made up by doping a certain amount of silica fume, so thatThe content of hydrated calcium silicate is improved, the physical and chemical properties of the modified lead-zinc slag wheel guard belt product are optimized, and the later strength and durability of the product are guaranteed; the viscosity of the slurry of the product after water is added is adjusted by adding hydroxypropyl methyl cellulose ether (HPMC), so that the bonding strength and the construction workability of the repair material are improved; the toughening fibers are doped, so that the toughness of the wheel guard belt repairing material is improved, and cracking is prevented; the high-efficiency multifunctional composite additive is used for improving the workability and the pore structure of slurry formed by adding water into a product, and improving the comprehensive mechanical property and long-term durability of the formed repair material.
Description
Technical Field
The invention belongs to the field of resource utilization of high-performance engineering composite materials and inorganic solid wastes, is suitable for comprehensive utilization of lead-zinc slag, and is a method for preparing a novel composite material for wheel guard belt repair engineering by modifying high-performance phase change of the lead-zinc slag with low active silicon dioxide content and high density.
Background
Lead-zinc slag is the powdery waste slag discharged after lead-zinc ore dressing and smelting, and the annual discharged tailing slag amount of a common medium-scale lead-zinc ore plant is about 10-30 ten thousand tons. The discharge amount of lead-zinc tailings is large, and the conventional piling mode of a storage yard needs to occupy a large amount of land and causes pollution to rivers, lakes and ecological environments to a certain extent. Therefore, comprehensive utilization of lead-zinc tailing slag is imperative.
Lead-zinc ore has more than 150 varieties in nature, but the main mining values are galena (PbS) and white lead ore (PbCO)3) There are also more than 50 zinc ores, however, the most common are sphalerite (ZnS), calamine (ZnCO)3). The lead-zinc ore formation cause is complex, and the difference between the types of the lead-zinc ore and the associated ore is large due to different growth environments. The difference of the components of tailings and slag generated by lead-zinc ores under different geological conditions and in different regions is large. At present, lead-zinc tailings are mainly used as a mineralizer to produce cement clinker, so that the formation temperature of clinker minerals can be effectively reduced, the reaction process of tricalcium silicate is accelerated, energy is effectively saved, consumption is reduced, and the production cost is reduced. According toThe lead-zinc tailings are rich in calcium oxide, iron oxide and other components, and the lead-zinc tailings and the slag are used for replacing part of raw materials to produce cement, so that the deficiency of the iron content of the clay is supplemented, and the using amount of the calcium raw materials can be saved.
The lead-zinc tailings and the slag are rich in silicon dioxide, so that the lead-zinc tailings and the slag have a prospect of being used for preparing silicate products, the lead-zinc tailings and the slag with the silicon dioxide content of less than 35% are subjected to phase change modification and activation, and the application of the novel road wheel-protecting belt repairing material is not reported at present.
Disclosure of Invention
The invention provides a novel road wheel guard belt repair engineering composite material and a preparation method thereof aiming at silicon dioxide and silicate minerals contained in lead-zinc tailing slag.
The technical scheme of the invention comprises the following main parts:
1) lead-zinc slag phase change modification
Lead-zinc slag contains abundant silica, but the silica is mostly in a crystalline state, lacks necessary activity, and is difficult to produce volcanic ash reaction and effect. The technical means adopted by the patent is phase change modification, namely, Na with a certain mass proportion is doped into lead-zinc slag2CO3The powder is subjected to high-temperature phase change modification, so that the inactive silica crystals in the lead-zinc slag are changed from a crystalline state to an active amorphous state, the active amorphous silica in the lead-zinc slag after the phase change modification is hydrated with cement, and part of superfine silicate minerals in the lead-zinc slag have better binding capacity with hydrated calcium silicate as microaggregate, so that the mechanical strength and the durability of the novel wheel guard band repairing material are improved.
The temperature of the high temperature phase change modification is an important process parameter. The lead-zinc slag is ball-milled to particles with the particle size of 80-150 meshes, so that the uniformity of phase change modification can be improved, and the temperature of high-temperature modification can be reduced to a certain extent. Adding Na with the particle size of 100-180 meshes2CO3The powder can effectively reduce the melting point and the phase transition temperature of the lead-zinc slag, therebyThe phase change modification process of the lead-zinc slag is greatly simplified, and the energy consumption is effectively reduced. The study showed that the addition of Na2CO3The phase transition temperature of the lead-zinc slag can be reduced to 650-900 ℃ after the powder is pulverized, and the temperature range is selected as the calcination modification temperature. A large number of experiments show that: na (Na)2CO3The amount of powder added is generally determined depending on the mineral phase of the lead-zinc slag and the relative contents of the respective chemical elements, and generally varies within a range of 0.5wt% to 10.0 wt%.
The time of the high-temperature phase change process is also an important parameter, and experiments show that: if the time is less than 2 hours, the degree of phase change modification is low, the content of active amorphous silicon dioxide is low, and the effect of the volcanic ash effect is influenced; when the time is longer than 4 hours, a certain sintering phenomenon may occur, and the amorphous phase transition activation effect of the crystalline silica may also be affected. Thus, based on a number of experimental results, the time for the phase change modification process was finally determined to be 2-4 hours. After the phase change modification is finished and the temperature is cooled to room temperature, the mixture is ball-milled to 160-200 meshes.
2) High-efficiency multifunctional composite additive
The additive is an important component for preparing the high-performance lead-zinc slag wheel guard strip material, can adjust the construction workability, and can greatly improve the mechanical property and the physical and chemical properties of the high-performance lead-zinc slag wheel guard strip material. The high-efficiency multifunctional composite additive prepared by the invention has comprehensive functions of reducing water, controlling workability, improving cohesiveness, strength, durability and the like. The high-efficiency polycarboxylic acid or modified polycarboxylic acid is selected as the water reducing agent, and the mechanical strength of the wheel guard belt material is improved by reducing the mixing water consumption. The wheel guard belt material does not need to have large fluidity in the construction process, the fluidity of the wheel guard belt is designed and controlled by compounding and adding hydroxypropyl methyl cellulose ether (HPMC), when the viscosity of the wheel guard belt is less than 100,000 Pa.S, the fluidity is large, the phenomena of hanging and even flowing and the like are easy to occur, and a stable protective layer is difficult to form on the surface of the wheel guard belt; when the viscosity is more than 250,000 mPa.S, the construction operation difficulty is increased, the surface is difficult to flatten, and the compactness and the later strength of the protective layer after construction are seriously influenced. Ethylene vinyl acetate copolymer (VAC/E) with good dispersion function is used as a dispersing agent, so that the dispersibility of each component and the uniformity of the wheel guard belt repairing material are improved. Meanwhile, a certain amount of defoaming agent is added to improve the pore structure and improve the mechanical property of the repair material. Through multiple experiments, the composition of the high-efficiency multifunctional composite additive is determined, and the high-efficiency multifunctional composite additive is compounded by 80-100 parts of polycarboxylic acid water reducing agent or modified polycarboxylic acid water reducing agent, 60-80 parts of hydroxypropyl methyl cellulose ether (HPMC), 20-40 parts of ethylene vinyl acetate copolymer (VAC/E) and 10-20 parts of defoaming agent.
3) Toughening and crack resistance
In order to improve the toughness and the crack resistance of the wheel guard belt material, 0-2 parts of toughening fiber is added. The toughening fiber is preferably non-metallic inorganic fiber or organic fiber, such as one or more of PVA fiber, PE fiber, basalt fiber, carbon fiber, polypropylene fiber, etc.
4) Late strength
By adding 3-6 parts of silica fume with the grain size range of 0.1-0.3 mu m and the purity of more than 90 percent, the defect of insufficient content of amorphous silica in the phase-change modified lead-zinc slag is overcome, the content of calcium silicate hydrate in cement can be improved, and the later-stage mechanical property and the physical and chemical properties of the repair material are further improved. Meanwhile, the addition of the fly ash micro-bead powder can improve the workability of construction operation and can also improve the later strength of the material to a certain extent.
A volcanic ash activity test is carried out on the phase-change modified lead-zinc slag, and the activity index of the modified lead-zinc tailings is represented by the ratio of the compressive strength of the cement mortar 28 d doped with 30% of the phase-change modified lead-zinc slag to the compressive strength of the silicate cement mortar 28 d by adopting a compressive strength ratio method. If the ratio is more than 0.62, the smelted lead-zinc tailings are considered to have pozzolanic gelling activity, because the compression strength ratio of the inactive ground quartz powder is 0.62.
TABLE 128 days intensity ratio
It can be seen from table 1 that the ratio of the compressive strength of the cement mortar 28 d to the compressive strength of the portland cement mortar 28 d of the smelted lead-zinc tailings is 0.90-0.62, and the smelted lead-zinc tailings have good pozzolanic gelling activity.
The technical scheme for realizing the aim of the invention comprises the following specific steps:
firstly, ball-milling lead-zinc slag until the granularity ranges from 80 meshes to 150 meshes;
secondly, adding a certain mass part of Na into the ball-milled lead-zinc slag2CO3Powder and fully stirring to form a uniform mixture;
thirdly, adding the mixture powder into a high-temperature furnace for phase change modification for 2-4 hours, then slowly cooling to room temperature and performing ball milling to form phase change modified lead-zinc slag powder;
and fourthly, weighing the raw materials according to the mass part ratio, 70-80 parts of cement, 3-6 parts of silica fume, 0.5-3 parts of bead powder, 50-65 parts of sand, 30-45 parts of phase change modified lead-zinc slag powder, 0-2 parts of toughening fiber and 0.48-0.68 part of multifunctional composite additive.
The fifth step: sequentially adding silica fume, cement, micro-bead powder, sand, phase-change modified lead-zinc slag powder, toughening fibers and a high-efficiency multifunctional composite additive into a stirring pot, and stirring for 4-8 minutes to form a modified lead-zinc slag wheel guard belt repairing material;
and a sixth step: and carrying out damp-proof sealing packaging on the modified lead-zinc slag wheel guard belt repairing material.
Drawings
FIG. 1 is a process flow chart for preparing the phase-change modified lead-zinc slag wheel-protecting belt repairing material, and the main processes comprise ball milling and Na treatment of lead-zinc slag2CO3High-temperature phase change modification of the mixture of the powder and the lead-zinc slag, compounding of multifunctional additives, uniform stirring and compounding of semi-finished products, sealing and packaging and the like.
Detailed Description
The following specifically describes embodiments of the present invention.
As shown in fig. 1:
firstly, ball-milling lead-zinc slag until the granularity ranges from 80 meshes to 150 meshes;
secondly, adding a certain mass part of Na into the ball-milled lead-zinc slag2CO3The powder is prepared by mixing the raw materials,and fully stirring to form a uniform mixture;
thirdly, adding the mixture powder into a high-temperature furnace for phase change modification for 2-4 hours, then slowly cooling to room temperature and performing ball milling to form phase change modified lead-zinc slag powder;
and fourthly, weighing the raw materials according to the mass part ratio, 70-80 parts of cement, 3-6 parts of silica fume, 0.5-3 parts of bead powder, 50-65 parts of sand, 30-45 parts of phase change modified lead-zinc slag powder, 0-2 parts of toughening fiber and 0.48-0.68 part of multifunctional composite additive.
The fifth step: sequentially adding silica fume, cement, micro-bead powder, sand, phase-change modified lead-zinc slag powder, toughening fibers and a high-efficiency multifunctional composite additive into a stirring pot, and stirring for 4-8 minutes to form a modified lead-zinc slag wheel guard belt repairing material;
and a sixth step: and carrying out damp-proof sealing packaging on the modified lead-zinc slag wheel guard belt repairing material.
The cement in each step is 425 or 525 Portland cement; the range of the diameter of the sand grains is 0.25-0.35 mm; the silica fume is silicon dioxide (SiO)2) The content is more than 90 percent, and the grain diameter is 0.1-0.3 μm.
The multifunctional composite admixture consists of polycarboxylic acid or modified polycarboxylic acid water reducing agent, hydroxypropyl methyl cellulose ether (HPMC) with the viscosity range of 100,000 and 250,000 mPa.S, ethylene vinyl acetate copolymer (VAC/E) with the glass transition temperature (Tg) not lower than-7 ℃, defoaming agent and the like. The high-efficiency additive comprises 80-100 parts of polycarboxylic acid water reducing agent or modified polycarboxylic acid water reducing agent, 60-80 parts of hydroxypropyl methyl cellulose ether (HPMC), 20-40 parts of ethylene vinyl acetate copolymer (VAC/E) and 10-20 parts of defoaming agent.
In the following examples, lead-zinc tailings from Fujian were used and the chemical composition analysis is shown in Table 2.
TABLE 2 chemical composition analysis of lead-zinc tailings after smelting
Example 1: with reference to fig. 1, the mix proportions are shown in table 3.
Table 3 example 1 mix proportions
The first step is as follows: 0.5 kg of silica fume, 0.5 kg of microbead powder, 5.5 kg of cement, 1 kg of 800 ℃ high-temperature phase change modified lead-zinc slag powder, 0.01 kg of dispersible latex powder, 0.02 kg of defoaming agent, 0.040 kg of water reducing agent, 0.025 kg of hydroxypropyl methyl cellulose ether (HPMC), 0.05 kg of polypropylene fiber and 5 kg of sand are sequentially added into a stirring pot and stirred for 1-2 minutes.
The second step is that: adding 1.75 kg of mixing water, stirring for 3-5 minutes, and pouring a test piece.
Example 2: the mix proportions are shown in Table 4 in conjunction with FIG. 1
Table 4 example 2 mix proportions
The first step is as follows: 0.5 kg of silica fume, 0.5 kg of microbead powder, 7 kg of cement, 1 kg of smelted lead-zinc tailing powder, 0.01 kg of dispersible latex powder, 0.02 kg of defoaming agent, 0.035 kg of water reducing agent, 0.025 kg of hydroxypropyl methyl cellulose ether (HPMC), 0.05 kg of polypropylene fiber and 5 kg of machine-made sand are sequentially added into a stirring pot and stirred for 1-2 minutes.
The second step is that: adding 1.75 kg of mixing water, stirring for 3-5 minutes, and pouring a test piece.
Example 3: the mix proportions are shown in Table 5 in conjunction with FIG. 1.
Table 5 example 3 mix proportions
The first step is as follows: 0.5 kg of silica fume, 0.5 kg of microbead powder, 7.5 kg of cement, 1 kg of smelted lead-zinc tailing powder, 0.01 kg of dispersible latex powder, 0.02 kg of defoaming agent, 0.035 kg of water reducing agent, 0.025 kg of hydroxypropyl methyl cellulose ether (HPMC), 0.05 kg of polypropylene fiber and 5 kg of machine-made sand are sequentially added into a stirring pot and stirred for 1-2 minutes.
The second step is that: adding 1.75 kg of mixing water, stirring for 3-5 minutes, and pouring a test piece.
The compressive strength and tensile bond strength of the tire belt repairing material prepared in the above embodiment are shown in table 6.
TABLE 6 compressive strength and tensile bond strength of the wheel-protecting belt repairing material made from lead-zinc tailings
Claims (8)
1. A modified lead-zinc slag wheel guard belt repairing material and a preparation method thereof are characterized by comprising the following steps:
firstly, ball-milling lead-zinc slag until the granularity ranges from 80 meshes to 150 meshes;
secondly, adding a certain mass part of Na into the ball-milled lead-zinc slag2CO3Powder and fully stirring to form a uniform mixture;
thirdly, adding the mixture powder into a high-temperature furnace for phase change modification for 2-4 hours, then slowly cooling to room temperature and performing ball milling to form phase change modified lead-zinc slag powder;
fourthly, weighing raw materials according to the mass part ratio, wherein the raw materials comprise 70-80 parts of cement, 3-6 parts of silica fume, 0.5-3 parts of micro-bead powder, 50-65 parts of sand, 30-45 parts of phase change modified lead-zinc slag powder, 0-2 parts of toughening fiber and 0.48-0.68 part of multifunctional composite additive;
the fifth step: sequentially adding silica fume, cement, micro-bead powder, sand, phase-change modified lead-zinc slag powder, toughening fibers and a high-efficiency multifunctional composite additive into a stirring pot, and stirring for 4-8 minutes to form a modified lead-zinc slag wheel guard belt repairing material;
and a sixth step: and carrying out damp-proof sealing packaging on the modified lead-zinc slag wheel guard belt repairing material.
2. The modified lead-zinc slag wheel-protecting belt repairing material as claimed in claim 1, wherein Na with a particle size of 100-180 meshes is uniformly added into the lead-zinc slag2CO3And (3) powder, and performing high-temperature calcination phase change modification on the mixture.
3. The modified lead-zinc slag wheel guard belt repairing material and the preparation method thereof as claimed in claims 1 and 2, wherein Na is2CO3The mass addition amount of the powder is 0.5wt% -10.0 wt%.
4. The modified lead-zinc slag wheel guard belt repairing material and the preparation method thereof as claimed in claims 1-4, wherein the lead-zinc slag and Na2CO3The phase change modification temperature of the powder mixture is 650-900 ℃.
5. The modified lead-zinc slag wheel guard strip repair material and the preparation method thereof as claimed in claims 1-5, wherein the phase-change modified lead-zinc slag mixture is cooled to room temperature and then ball-milled to a fineness of 160-200 mesh.
6. The modified Pb-Zn slag tyre-protecting repair material as claimed in claims 1-6, wherein the cement is 425 or 525 Portland cement, the sand has a particle size in the range of 0.25-0.35mm and a fineness modulus in the range of 1.0-2.0, the micro-bead powder is fly ash micro-beads, and the silica fume is Silica (SiO) with a particle size in the range of 0.1-0.3 μm2) And the purity is not less than 90%.
7. The modified lead-zinc slag wheel guard belt repairing material and the preparation method thereof as claimed in claims 1-7, wherein the high efficiency admixture is composed of polycarboxylic acid or modified polycarboxylic acid water reducing agent, hydroxypropyl methyl cellulose ether (HPMC) with viscosity range of 100,000 and 250,000 mPa.S, ethylene vinyl acetate copolymer (VAC/E) with glass transition temperature (Tg) not lower than-7 ℃, defoaming agent and the like.
8. The modified lead-zinc slag tire protective belt repair material and the preparation method thereof as claimed in claims 1 and 7, wherein the high efficiency admixture comprises 80-100 parts of polycarboxylic acid water reducer or modified polycarboxylic acid water reducer, 60-80 parts of hydroxypropyl methyl cellulose ether (HPMC), 20-40 parts of ethylene vinyl acetate copolymer (VAC/E) and 10-20 parts of defoaming agent.
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