CN117003523A - Fluorite tailing slag calcium silicate board and preparation method thereof - Google Patents
Fluorite tailing slag calcium silicate board and preparation method thereof Download PDFInfo
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- CN117003523A CN117003523A CN202310877178.3A CN202310877178A CN117003523A CN 117003523 A CN117003523 A CN 117003523A CN 202310877178 A CN202310877178 A CN 202310877178A CN 117003523 A CN117003523 A CN 117003523A
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- China
- Prior art keywords
- calcium silicate
- silicate board
- fluorite
- glass fiber
- tailing slag
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- 239000000378 calcium silicate Substances 0.000 title claims abstract description 68
- 229910052918 calcium silicate Inorganic materials 0.000 title claims abstract description 68
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 title claims abstract description 68
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 title claims abstract description 56
- 239000010436 fluorite Substances 0.000 title claims abstract description 55
- 239000002893 slag Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000003365 glass fiber Substances 0.000 claims abstract description 57
- 238000003756 stirring Methods 0.000 claims abstract description 22
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 16
- 239000006004 Quartz sand Substances 0.000 claims abstract description 15
- 239000004568 cement Substances 0.000 claims abstract description 15
- 239000011268 mixed slurry Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 5
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 17
- 235000010413 sodium alginate Nutrition 0.000 claims description 17
- 229940005550 sodium alginate Drugs 0.000 claims description 17
- 239000000661 sodium alginate Substances 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 239000007822 coupling agent Substances 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 13
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 4
- MTEZSDOQASFMDI-UHFFFAOYSA-N 1-trimethoxysilylpropan-1-ol Chemical compound CCC(O)[Si](OC)(OC)OC MTEZSDOQASFMDI-UHFFFAOYSA-N 0.000 claims description 2
- 238000004090 dissolution Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000835 fiber Substances 0.000 description 12
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 125000003700 epoxy group Chemical group 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 2
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-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
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/42—Glass
-
- 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
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/241—Paper, e.g. waste paper; Paper pulp
-
- 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
-
- 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of plates, and discloses a fluorite tailing slag calcium silicate plate and a preparation method thereof. The method comprises the steps of adding quartz sand, cement, fluorite tailing slag, paper pulp and glass fiber into water, stirring and mixing the components to form mixed slurry, and then sequentially carrying out shoveling and forming, pre-curing treatment, autoclaved curing and drying on the mixed slurry to obtain the calcium silicate board. According to the invention, the fluorite tailing slag is doped into the calcium silicate board in a large amount, so that the waste utilization of the fluorite tailing slag is realized, the production cost of the board is reduced, and compared with the traditional calcium silicate board, the heat preservation and heat insulation performance and mechanical strength of the calcium silicate board are improved.
Description
Technical Field
The invention relates to the technical field of plates, in particular to a fluorite tailing slag calcium silicate plate and a preparation method thereof.
Background
The fluorite is mainly calcium fluoride and is transparent rock with various colors such as white, red, blue, green, purple and the like. Most fluorite existing in nature is mixed with silicon oxide, calcium carbonate, ferric oxide and aluminum oxide. The melting point is 1230 ℃, has stronger fluxing action, and is a fluxing agent raw material in glaze. The chemical components of fluorite slag formed after fluorite mining and processing are 42.76% of silicon dioxide, 7.58% of aluminum oxide, 1.02% of ferric oxide, 38.97% of calcium oxide, 2.82% of magnesium oxide, 1.10% of potassium oxide, 0.44% of sodium oxide, 51.69% of phosphorus pentoxide, 0.2% of sulfur trioxide, 0.12% of titanium oxide, 2.00% of fluorine and 1.36% of burning loss. In view of chemical composition, the main composition of fluorite slag is calcium silicate, and for a long time, the comprehensive utilization of fluorite slag has been a worldwide problem, and although the comprehensive utilization of fluorite slag is studied in great numbers at home and abroad, most of the fluorite slag has not been realized in industry for various reasons in terms of technology and economy. The calcium silicate board can be used as a heat-insulating material or a decorative material. The calcium silicate board for heat preservation is mainly used for exterior wall cladding, exterior wall veneering and the like. The decorative calcium silicate board is mainly used for suspended ceilings, house partition walls, indoor floors and the like. With the continuous expansion of the market of heat-insulating decorative finished boards, the demand of calcium silicate boards is also increased.
Chinese patent publication No. CN104926236 discloses a low-density fiber reinforced calcium silicate fireproof board and a preparation method thereof, the method comprising: step 1, mixing plant fibers, cement and quartz stone for pulping, wherein the molar ratio of calcium to silicon is 0.80-0.82, and the mass of the plant fibers accounts for 8-12% of the total weight of the raw materials; step 2, forming a plate into a blank, and preparing a blank; step 3, pre-reaction: placing the blank in a reaction kettle, under the pressure of 1.2+/-0.1 Mpa in the reaction kettle, smoothly heating to 250 ℃ at the heating rate of 30 ℃/h from the steam entering the reaction kettle, and then keeping the temperature and the pressure for not less than 24 hours; step 4, autoclaved curing; and 5, demolding, drying and polishing edges to obtain the low-density fiber reinforced calcium silicate fireproof plate. Chinese patent publication No. CN115959867 discloses a preparation method of a modified oyster shell antibacterial calcium silicate board. Immersing a biomass waste oyster shell into a Cu (NO 3) 2.3H2O solution, filtering, and calcining the obtained solid to obtain CuO/CaO powder; adding water to hydrate the mixture to obtain CuO/Ca (OH) 2 powder; mixing the mixture with diatomite, adding fiber and ordinary Portland cement to obtain mixed powder, and then adding water to stir to obtain slurry; and (3) performing compression molding and autoclaved curing to obtain the modified oyster shell antibacterial calcium silicate board. The calcium silicate board prepared in the above patent documents has limited strength, and the mechanical strength of the calcium silicate board needs to be further improved.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a fluorite tailing slag calcium silicate board and a preparation method thereof. According to the invention, the fluorite tailing slag is doped in a large amount in the calcium silicate board, so that the waste utilization of the fluorite tailing slag is realized, the production cost of the board is reduced, and compared with the traditional calcium silicate board, the heat preservation and heat insulation performance and mechanical strength of the calcium silicate board are improved.
In order to achieve the above object, the present invention adopts the following technical scheme:
the fluorite tailing slag calcium silicate board comprises the following components in parts by weight:
35-45 parts of quartz sand
25-30 parts of cement
20-30 parts of fluorite tailing slag
4-8 parts of paper pulp.
The main components of the calcium silicate board in the prior art are cement, quartz sand, paper pulp and the like, and the fluorite tailing slag is doped in the calcium silicate board in a large amount, so that the waste utilization of the fluorite tailing slag is realized, the production cost of the board is reduced, and compared with the traditional calcium silicate board, the heat preservation and heat insulation performance and mechanical strength of the calcium silicate board are improved.
Preferably, the calcium silicate board further comprises glass fibers.
The strength enhancement of the calcium silicate boards in the prior art is generally achieved by adding a single pulp, but the strength enhancement of the calcium silicate boards is limited by the single addition of cotton pulp. According to the invention, cotton pulp fibers and glass fibers are mixed and added into the calcium silicate board, and the mechanical strength of the calcium silicate board is further improved under the synergistic effect of the cotton pulp fibers and the glass fibers.
Preferably, the mass ratio of the glass fiber to the paper pulp is 1:1-5.
Preferably, the glass fiber is modified, and the modification method comprises the following steps:
1) Adding gamma-glycidol ether oxypropyl trimethoxy silane into a mixed solution of ethanol and water, heating, stirring and dissolving to obtain a silane coupling agent solution, adding glass fiber into the silane coupling agent solution for reaction, separating and drying to obtain coupling agent modified glass fiber;
2) Adding sodium alginate into water, stirring for dissolution, adding sodium hydroxide catalyst, adding coupling agent to modify glass fiber for reaction, separating, and drying.
Experiments show that the common glass fiber is difficult to uniformly disperse when being added into a calcium silicate board component, and the glass fiber and paper pulp cannot form an interweaved three-dimensional network structure, the glass fiber is further modified, the surface of the glass fiber is grafted with epoxy groups through a silicic acid coupling agent, and then the epoxy groups react with hydroxyl groups on sodium alginate in a ring-opening way, so that the sodium alginate is grafted on the surface of the glass fiber, and COO is loaded on the surface of the glass fiber - Under the action of electrostatic repulsion, the glass fiber can be fully dispersed in the components, and simultaneously hydroxyl groups which do not participate in reaction on sodium alginate molecules and hydroxyl groups on the surface of paper pulp fibers form hydrogen bond acting force, and the hydroxyl groups are combined to form an interweaved three-dimensional network, so that the mechanical strength of the calcium silicate board is greatly further improved.
Preferably, the heating temperature in the step 1) is 40-60 ℃.
Preferably, the mass ratio of the reaction glass fiber to the silane coupling agent in the step 1) is 1:0.2-0.6.
Preferably, the reaction time in the step 1) is 3 to 5 hours.
Preferably, the mass ratio of the coupling agent modified glass fiber to the sodium alginate in the step 2) is less than 1:0.5.
When the mass ratio of the coupling agent modified glass fiber to the sodium alginate is greater than 1:0.5, the epoxy groups on the surface of the coupling agent modified glass fiber are excessive, the hydroxyl groups on the sodium alginate can fully react with the epoxy groups on the surface of the glass fiber, so that the surface of the finally obtained glass fiber lacks hydroxyl groups and cannot form hydrogen bond acting force with the hydroxyl groups on the pulp fiber, and the strength of the calcium silicate board is further improved. Therefore, the mass ratio of the coupling agent modified glass fiber to the sodium alginate is controlled to be less than 1:0.5.
Preferably, the reaction time in the step 3) is 30-60min.
The preparation method of the fluorite tailing slag calcium silicate board comprises the following steps:
1) Crushing fluorite tailing slag into particles, mixing with quartz sand and cement, adding water and stirring to form slurry;
2) Adding paper pulp or paper pulp and glass fiber or paper pulp and modified glass fiber into the slurry, and continuously and uniformly stirring to obtain mixed slurry;
3) And (3) sequentially carrying out shoveling and forming, pre-curing, autoclaved curing and drying on the mixed slurry to obtain the calcium silicate board.
The invention has the following beneficial effects:
1) According to the invention, the fluorite tailing slag is doped in a large amount in the calcium silicate board, so that the waste utilization of the fluorite tailing slag is realized, the production cost of the board is reduced, and compared with the traditional calcium silicate board, the heat preservation and heat insulation performance and mechanical strength of the calcium silicate board are improved;
2) According to the invention, cotton pulp fibers and glass fibers are mixed and added into the calcium silicate board, and the mechanical strength of the calcium silicate board is further improved under the synergistic effect of the cotton pulp fibers and the glass fibers;
3) The modified glass fiber can be fully dispersed in the components, and the modified glass fiber and the paper pulp fiber are combined to form an interweaved three-dimensional network, so that the mechanical strength of the calcium silicate board is greatly and further improved.
Detailed Description
The materials and equipment used in the specific examples of the present invention are commercially available or are commonly used in the art, and the methods in the examples are conventional in the art unless otherwise specified.
Example 1
The fluorite tailing slag calcium silicate board comprises the following components in parts by weight in dry weight:
44 parts of quartz sand
28 parts of cement
29 parts of fluorite tailing slag
7 parts of paper pulp.
The preparation method of the fluorite tailing slag calcium silicate board comprises the following steps:
1) Crushing fluorite tailing slag into particles, mixing with quartz sand and cement, adding water and stirring to form slurry;
2) Adding paper pulp into the slurry, and continuously and uniformly stirring to obtain mixed slurry;
3) The mixed slurry is sequentially subjected to shoveling and forming, pre-curing treatment, autoclaved curing and drying, wherein the pre-curing treatment temperature is 60 ℃, the time is 8 hours, and the pressure is 0.12MPa; the autoclaved curing temperature is 150 ℃, the time is 18h, and the pressure is 1.0MPa, so that the calcium silicate board is obtained.
Comparative example 1
Comparative example 1 is different from example 1 in that fluorite tailing slag is replaced with quartz sand.
Example 2
The fluorite tailing slag calcium silicate board comprises the following components in parts by weight in dry weight:
34 parts of quartz sand
26 parts of cement
25 parts of fluorite tailing slag
Pulp 5 parts
3 parts of glass fiber.
The preparation method of the fluorite tailing slag calcium silicate board comprises the following steps:
1) Crushing fluorite tailing slag into particles, mixing with quartz sand and cement, adding water and stirring to form slurry;
2) Adding paper pulp and glass fiber into the slurry, and continuously and uniformly stirring to obtain mixed slurry;
3) The mixed slurry is sequentially subjected to shoveling and forming, pre-curing treatment, autoclaved curing and drying, wherein the pre-curing treatment temperature is 60 ℃, the time is 9h, and the pressure is 0.13MPa; the autoclaved curing temperature is 155 ℃, the time is 20h, and the pressure is 1.2MPa, so that the calcium silicate board is obtained.
Example 3
The fluorite tailing slag calcium silicate board comprises the following components in parts by weight in dry weight:
45 parts of quartz sand
30 parts of cement
Fluorite tailing slag 30 parts
8 parts of paper pulp
8 parts of modified glass fiber.
The preparation method of the modified glass fiber comprises the following steps:
1) Adding gamma-glycidoxypropyl trimethoxy silane into a mixed solution of ethanol and water mixed according to a mass ratio of 5:1, heating to 60 ℃, stirring and dissolving to obtain a silane coupling agent solution, adding glass fiber into the silane coupling agent solution for reaction for 5 hours, wherein the mass ratio of the glass fiber to the silane coupling agent is 1:0.6; separating and drying to obtain the coupling agent modified glass fiber;
2) Adding sodium alginate into water, stirring and dissolving to prepare sodium alginate solution with the concentration of 0.5wt%, adding sodium hydroxide catalyst with the mass concentration of 0.1%, adding coupling agent modified glass fiber for reaction for 60min, separating and drying to obtain the sodium alginate.
The preparation method of the fluorite tailing slag calcium silicate board comprises the following steps:
1) Crushing fluorite tailing slag into particles, mixing with quartz sand and cement, adding water and stirring to form slurry;
2) Adding paper pulp and modified glass fiber into the slurry, and continuously and uniformly stirring to obtain mixed slurry;
3) The mixed slurry is sequentially subjected to shoveling and forming, pre-curing treatment, autoclaved curing and drying, wherein the pre-curing treatment temperature is 60 ℃, the time is 8 hours, and the pressure is 0.10MPa; the autoclaved curing temperature is 160 ℃, the time is 15h, and the pressure is 1.0MPa, so that the calcium silicate board is obtained.
Comparative example 2
Comparative example 2 differs from example 3 in that the mass ratio of the coupling agent modified glass fiber to sodium alginate in the preparation of the modified glass fiber is 1:0.4.
Example 4
The fluorite tailing slag calcium silicate board comprises the following components in parts by weight in dry weight:
35 parts of quartz sand
25 parts of cement
20 parts of fluorite tailing slag
Pulp 4 parts
0.8 parts of modified glass fiber.
The preparation method of the modified glass fiber comprises the following steps:
1) Adding gamma-glycidoxypropyl trimethoxy silane into a mixed solution of ethanol and water mixed according to a mass ratio of 5:1, heating to 40 ℃, stirring and dissolving to obtain a silane coupling agent solution, adding glass fiber into the silane coupling agent solution for reaction for 3 hours, wherein the mass ratio of the glass fiber to the silane coupling agent is 1:0.2; separating and drying to obtain the coupling agent modified glass fiber;
2) Adding sodium alginate into water, stirring and dissolving to prepare sodium alginate solution with the concentration of 0.5wt%, adding sodium hydroxide catalyst with the mass concentration of 0.1%, adding coupling agent modified glass fiber for reaction for 30min, separating and drying to obtain the sodium alginate.
The preparation method of the fluorite tailing slag calcium silicate board comprises the following steps:
1) Crushing fluorite tailing slag into particles, mixing with quartz sand and cement, adding water and stirring to form slurry;
2) Adding paper pulp and modified glass fiber into the slurry, and continuously and uniformly stirring to obtain mixed slurry;
3) The mixed slurry is sequentially subjected to shoveling and forming, pre-curing treatment, autoclaved curing and drying, wherein the pre-curing treatment temperature is 70 ℃, the time is 12 hours, and the pressure is 0.10MPa; the autoclaved curing temperature is 180 ℃, the time is 13h, and the pressure is 1.0MPa, so that the calcium silicate board is obtained.
Performance testing
The strength of the calcium silicate board is tested according to CB/T8040, the thermal conductivity is tested according to GB/T10294, and the test results are as follows:
the present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present invention will fall within the scope of the present invention without departing from the technical scope of the present invention.
Claims (10)
1. The fluorite tailing slag calcium silicate board is characterized by comprising the following components in parts by weight in dry weight:
35-45 parts of quartz sand
25-30 parts of cement
20-30 parts of fluorite tailing slag
4-8 parts of paper pulp.
2. The fluorite tailings calcium silicate board of claim 1 further comprising glass fibers.
3. The fluorite tailing slag calcium silicate board as claimed in claim 1, wherein the mass ratio of the glass fiber to the pulp is 1:1-5.
4. A fluorite tailing slag calcium silicate board as claimed in claim 3, wherein the glass fibre is modified by a method comprising the steps of:
adding gamma-glycidol ether oxypropyl trimethoxy silane into a mixed solution of ethanol and water, heating, stirring and dissolving to obtain a silane coupling agent solution, adding glass fiber into the silane coupling agent solution for reaction, separating and drying to obtain coupling agent modified glass fiber;
adding sodium alginate into water, stirring for dissolution, adding sodium hydroxide catalyst, adding coupling agent to modify glass fiber for reaction, separating, and drying.
5. The fluorite tailings calcium silicate board of claim 4, wherein the heating temperature in step 1) is 40-60 ℃.
6. The fluorite tailing slag calcium silicate board according to claim 4, wherein the mass ratio of the reaction glass fiber to the silane coupling agent in the step 1) is 1:0.2-0.6.
7. The fluorite tailings calcium silicate board of claim 4, wherein the reaction time in step 1) is 3-5 hours.
8. The fluorite tailing slag calcium silicate board according to claim 4, wherein the mass ratio of the coupling agent modified glass fiber to the sodium alginate in the step 2) is less than 1:0.5.
9. The fluorite tailings calcium silicate board of claim 4, wherein the reaction time in step 3) is 30-60min.
10. A method for preparing a fluorite tailing slag calcium silicate board according to any one of claims 1 to 9, comprising the steps of:
crushing fluorite tailing slag into particles, mixing with quartz sand and cement, adding water and stirring to form slurry;
adding paper pulp or paper pulp and glass fiber or paper pulp and modified glass fiber into the slurry, and continuously and uniformly stirring to obtain mixed slurry;
and (3) sequentially carrying out shoveling and forming, pre-curing, autoclaved curing and drying on the mixed slurry to obtain the calcium silicate board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310877178.3A CN117003523A (en) | 2023-07-18 | 2023-07-18 | Fluorite tailing slag calcium silicate board and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310877178.3A CN117003523A (en) | 2023-07-18 | 2023-07-18 | Fluorite tailing slag calcium silicate board and preparation method thereof |
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| Publication Number | Publication Date |
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| CN117003523A true CN117003523A (en) | 2023-11-07 |
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|---|---|---|---|
| CN202310877178.3A Pending CN117003523A (en) | 2023-07-18 | 2023-07-18 | Fluorite tailing slag calcium silicate board and preparation method thereof |
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| Country | Link |
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| CN (1) | CN117003523A (en) |
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2023
- 2023-07-18 CN CN202310877178.3A patent/CN117003523A/en active Pending
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