CN118271053B - High-temperature-resistant and wear-resistant valve plate, preparation method and application thereof in high-temperature kiln - Google Patents
High-temperature-resistant and wear-resistant valve plate, preparation method and application thereof in high-temperature kiln Download PDFInfo
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- CN118271053B CN118271053B CN202410710792.5A CN202410710792A CN118271053B CN 118271053 B CN118271053 B CN 118271053B CN 202410710792 A CN202410710792 A CN 202410710792A CN 118271053 B CN118271053 B CN 118271053B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000010451 perlite Substances 0.000 claims abstract description 105
- 235000019362 perlite Nutrition 0.000 claims abstract description 105
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 89
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 89
- 239000002002 slurry Substances 0.000 claims abstract description 33
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 29
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims abstract description 29
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims abstract description 29
- 239000004576 sand Substances 0.000 claims abstract description 28
- 229920002522 Wood fibre Polymers 0.000 claims abstract description 27
- 239000002025 wood fiber Substances 0.000 claims abstract description 27
- 239000003365 glass fiber Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000003756 stirring Methods 0.000 claims description 114
- 239000000243 solution Substances 0.000 claims description 112
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 90
- 239000007864 aqueous solution Substances 0.000 claims description 88
- 239000008367 deionised water Substances 0.000 claims description 70
- 229910021641 deionized water Inorganic materials 0.000 claims description 70
- LCPUCXXYIYXLJY-UHFFFAOYSA-N 1,1,2,4,4,4-hexafluorobutyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(F)(F)C(F)CC(F)(F)F LCPUCXXYIYXLJY-UHFFFAOYSA-N 0.000 claims description 54
- 238000010438 heat treatment Methods 0.000 claims description 42
- 238000006243 chemical reaction Methods 0.000 claims description 40
- 238000001914 filtration Methods 0.000 claims description 39
- 238000001035 drying Methods 0.000 claims description 38
- INQDDHNZXOAFFD-UHFFFAOYSA-N 2-[2-(2-prop-2-enoyloxyethoxy)ethoxy]ethyl prop-2-enoate Chemical compound C=CC(=O)OCCOCCOCCOC(=O)C=C INQDDHNZXOAFFD-UHFFFAOYSA-N 0.000 claims description 35
- 238000005406 washing Methods 0.000 claims description 33
- 125000003342 alkenyl group Chemical group 0.000 claims description 30
- 238000001816 cooling Methods 0.000 claims description 27
- 239000003607 modifier Substances 0.000 claims description 26
- 239000003469 silicate cement Substances 0.000 claims description 23
- 238000002156 mixing Methods 0.000 claims description 22
- 239000002131 composite material Substances 0.000 claims description 21
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 20
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 20
- 239000003995 emulsifying agent Substances 0.000 claims description 20
- 239000000839 emulsion Substances 0.000 claims description 20
- ONJQDTZCDSESIW-UHFFFAOYSA-N polidocanol Chemical compound CCCCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO ONJQDTZCDSESIW-UHFFFAOYSA-N 0.000 claims description 20
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 20
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 18
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims description 18
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 18
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 18
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000003999 initiator Substances 0.000 claims description 6
- 230000002209 hydrophobic effect Effects 0.000 claims description 5
- 239000012670 alkaline solution Substances 0.000 claims description 2
- 239000004568 cement Substances 0.000 abstract description 17
- 239000002245 particle Substances 0.000 abstract description 17
- 238000005336 cracking Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000011398 Portland cement Substances 0.000 abstract description 4
- 230000036571 hydration Effects 0.000 abstract description 3
- 238000006703 hydration reaction Methods 0.000 abstract description 3
- 238000003763 carbonization Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 29
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 28
- 230000000052 comparative effect Effects 0.000 description 28
- 238000001291 vacuum drying Methods 0.000 description 23
- 239000011541 reaction mixture Substances 0.000 description 13
- 238000012360 testing method Methods 0.000 description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 239000005457 ice water Substances 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000004721 Polyphenylene oxide Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 4
- 229920000570 polyether Polymers 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 125000000542 sulfonic acid group Chemical group 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 206010015535 Euphoric mood Diseases 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000006136 alcoholysis reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000191 poly(N-vinyl pyrrolidone) Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- -1 wood fiber Chemical class 0.000 description 1
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
- 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
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
- C04B14/068—Specific natural sands, e.g. sea -, beach -, dune - or desert sand
-
- 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
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/14—Minerals of vulcanic origin
- C04B14/18—Perlite
- C04B14/185—Perlite expanded
-
- 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
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/30—Oxides other than silica
- C04B14/303—Alumina
-
- 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
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/32—Carbides; Nitrides; Borides ; Silicides
- C04B14/325—Nitrides
- C04B14/328—Silicon nitride
-
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/02—Cellulosic materials
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1033—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/165—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds containing polyether side chains
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
- C04B24/383—Cellulose or derivatives thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/005—Particular materials for seats or closure elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/002—Details of the installations, e.g. fume conduits or seals
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of valve plates, in particular to a high-temperature-resistant and wear-resistant valve plate, a preparation method and application thereof in a high-temperature kiln. The raw materials of the slurry for preparing the valve plate comprise modified polyvinyl alcohol, sodium carboxymethyl cellulose, portland cement, river sand, expanded perlite, wood fiber, glass fiber and inorganic wear-resistant material, and the modified polyvinyl alcohol can not only improve the bonding strength of the slurry and improve the mechanical strength and wear resistance of the valve plate, but also improve the dispersing effect of cement particles, promote the adequate hydration of cement particles in the slurry and further improve the mechanical strength and wear resistance of the valve plate; the modified polyvinyl alcohol, sodium carboxymethyl cellulose and wood fiber can generate gaps during high-temperature carbonization, can provide expansion space for the valve plate, prevent the valve plate from cracking during thermal expansion, and improve the high-temperature resistance of the valve plate.
Description
Technical Field
The invention relates to the technical field of valve plates, in particular to a high-temperature-resistant and wear-resistant valve plate, a preparation method and application thereof in a high-temperature kiln.
Background
In a flue gas conveying and waste heat recovery system of a high-temperature kiln, a flue gas valve is required to be arranged on a high-temperature flue gas pipeline so as to cut off or adjust the flow of flue gas according to process control requirements, a valve plate of the flue gas valve used in the prior art is firstly formed by using reinforcing steel bars to form a framework during manufacturing, and then cement or other castable materials are poured outside the reinforcing steel bars to form the flue gas conveying and waste heat recovery system. Because the service scene of the valve plate is a high-temperature kiln, the steel bars inside the valve plate expand with heat and contract with cold under the high-temperature environment, and the external cement is cracked after deformation, so that the service life of the valve plate is shortened. In addition, the harmful components containing chlorine and alkali in the flue gas and dust gas are used for scouring and wearing the valve plate, so that the valve plate gradually peels off, the air quantity balance is influenced, and the stability of the system is further influenced.
Chinese patent application CN102900892A discloses a tertiary air valve plate production method, firstly, heat-resistant steel pieces are transversely and longitudinally welded in a staggered mode to form a valve plate framework, then castable is put into a model provided with the framework to be wrapped, and finally, the model is cured and calcined to obtain the tertiary air valve plate, wherein the castable is corundum-mullite, although the castable has good wear resistance, the valve plate needs higher temperature to realize crystallization and calcination, the energy loss is high, and the valve plate is high in compactness due to crystallization and calcination, when the valve plate is applied to a high-temperature kiln, the valve plate is easy to expand and crack due to heating, and steel piece framework materials inside the valve plate expand and contract with heat in a high-temperature environment, external cement cracks are caused after deformation, and the high-temperature resistance of the valve plate is poor.
Chinese patent CN102079636B discloses a method for preparing a high-temperature wear-resistant valve plate special for tertiary air duct of cement rotary kiln, which uses heat-resistant steel bar to prepare a latticed valve plate structure, and is equipped with corresponding heat-resistant nails and hanging rings to prepare a required casting mold frame, the wear-resistant casting material composed of aggregate, fine powder and micro powder is added into the casting mold frame, then binder and composite additive are added, ramming and vibration molding are carried out, so that the casting mold frame and the casting material are tightly packed, the required high-temperature wear-resistant valve plate is prepared through solidification process, and the problem of thermal expansion and contraction of steel bar materials under high-temperature environment is also existed, the high-temperature resistance is to be improved, the binding force among aggregate, fine powder, micro powder and binder is weak, the surface structure of the valve plate is relatively loose, and the wear resistance is to be improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a high-temperature-resistant and wear-resistant valve plate and a preparation method thereof, which are used for solving the problems of poor wear resistance and high-temperature cracking of the valve plate in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
A preparation method of a high-temperature-resistant and wear-resistant valve plate comprises the following steps:
Adding polyvinyl alcohol into deionized water, heating and stirring, and cooling to room temperature to obtain a polyvinyl alcohol solution;
Adding 2-acrylamide-2-methylpropanesulfonic acid and triethylene glycol diacrylate into deionized water, stirring and mixing, and then dropwise adding an alkaline solution to adjust the pH value to 7.0-7.5 to obtain a modifier solution;
Mixing a polyvinyl alcohol solution with a modifier solution, stirring and heating, adding an initiator solution, reacting, separating, purifying and drying after the reaction is finished to obtain modified polyvinyl alcohol;
Adding modified polyvinyl alcohol and sodium carboxymethylcellulose into water, heating and stirring, cooling to room temperature, adding Portland cement, river sand, hydrophobic modified expanded perlite, wood fiber, glass fiber and inorganic wear-resistant material, mixing, and stirring to obtain slurry;
And thirdly, pouring the slurry into a mould, compacting, and solidifying to obtain the high-temperature-resistant and wear-resistant valve plate.
Preferably, in the first step, when the polyvinyl alcohol solution is prepared, the mass ratio of the polyvinyl alcohol to the deionized water is (1-3) 100, and the condition of heating and stirring is that the stirring is carried out for 1-2 hours at the temperature of 70-80 ℃ at the stirring speed of 100-200 r/min.
Preferably, in the first step, when the modifier solution is prepared, the mass ratio of the 2-acrylamide-2-methylpropanesulfonic acid, the triethylene glycol diacrylate and the deionized water is (2.1-2.2): (2.6-2.8): 100, and the stirring and mixing conditions are that stirring is carried out for 20-40min at a stirring speed of 300-500 r/min.
Preferably, the lye comprises sodium hydroxide solution.
Further, the sodium hydroxide solution comprises 1-2mol/L sodium hydroxide solution.
Preferably, in the first step, when the modified polyvinyl alcohol is prepared, the mass ratio of the polyvinyl alcohol solution to the modifier solution to the initiator solution is 100 (10-15) (0.5-1), the stirring and heating conditions are that the temperature is raised to 50-55 ℃ at the stirring speed of 100-200r/min, and the reaction conditions are that the reaction is carried out for 2-4 hours at the temperature of 75-95 ℃.
Preferably, the initiator solution comprises an aqueous potassium persulfate solution.
Further, the aqueous potassium persulfate solution comprises 0.05mol/L aqueous potassium persulfate solution.
Preferably, the separation and purification comprises adding acetone into the reaction mixture obtained after the reaction is finished for precipitation, filtering, taking a filtered residue, washing the filtered residue with acetone and ice water at 0 ℃ in sequence, and drying the washed filtered residue in a vacuum drying oven at 50 ℃ for 8-12 hours.
Preferably, in the second step, the mass ratio of the modified polyvinyl alcohol, sodium carboxymethyl cellulose, water, silicate cement, river sand, hydrophobic modified expanded perlite, wood fiber, glass fiber and inorganic wear-resistant material is (8-12): (5-10): (300-400): (350-450): (650-750): (60-100): (10-15): (8-12): (10-15).
Preferably, the hydrophobically modified expanded perlite in the second step is prepared by the following steps:
Adding gamma-methacryloxypropyl trimethoxy silane into an ethanol water solution, stirring, adding expanded perlite, reacting, filtering, washing and drying after the reaction is finished to obtain alkenyl modified expanded perlite;
Step (2), sodium dodecyl benzene sulfonate and AEO-9 (peregal O-9, fatty alcohol polyoxyethylene ether) are dissolved in deionized water to obtain a composite emulsifier solution, alkenyl modified expanded perlite is added into the composite emulsifier solution, the temperature is raised to a set temperature under stirring to obtain a mixed system, a first part of hexafluorobutyl methacrylate and a first part of potassium persulfate aqueous solution are simultaneously added into the mixed system in a dropwise manner, and after the dropwise addition is completed, the seed emulsion is obtained through reaction;
And simultaneously dropwise adding a second part of hexafluorobutyl methacrylate and a second part of potassium persulfate aqueous solution into the seed emulsion, continuing to react after the dropwise adding is finished, adding a third part of potassium persulfate aqueous solution after the reaction is finished, reacting again, cooling after the reaction is finished, filtering, washing and drying to obtain the hydrophobically modified expanded perlite.
Preferably, in the step (1), the mass ratio of the expanded perlite to the ethanol aqueous solution to the gamma-methacryloxypropyl trimethoxy silane is 50 (300-500): 10-20, and the reaction condition is that the reaction is carried out for 2-3 hours at the temperature of 60-70 ℃.
Further, the aqueous ethanol solution is a 95wt% aqueous ethanol solution.
Preferably, in the step (2), the mass ratio of the aqueous solution of the hexafluorobutyl methacrylate, the sodium dodecyl benzene sulfonate, the AEO-9, the deionized water, the alkenyl modified expanded perlite and the potassium persulfate is (100-150): (3-5): (3-5): (1000-2000): (150-250): (80-100); the temperature is set to be 80-85 ℃, the reaction condition is that the reaction is carried out for 10-20min at the set temperature, the reaction condition is that the reaction is carried out for 1.5-2.5h at the set temperature, and the reaction condition is that the reaction is carried out for 20-30min at the set temperature.
Preferably, the first part of hexafluorobutyl methacrylate accounts for 1/4-1/3 of the mass of hexafluorobutyl methacrylate, the second part of hexafluorobutyl methacrylate accounts for 2/3-3/4 of the mass of hexafluorobutyl methacrylate, the first part of potassium persulfate aqueous solution accounts for 1/15-2/15 of the mass of potassium persulfate aqueous solution, the second part of potassium persulfate aqueous solution accounts for 10/15-13/15 of the mass of potassium persulfate aqueous solution, and the third part of potassium persulfate aqueous solution accounts for 1/15-3/15 of the mass of potassium persulfate aqueous solution.
Further, the aqueous potassium persulfate solution includes 10wt% aqueous potassium persulfate solution.
Preferably, the inorganic wear-resistant material in the second step includes aluminum oxide and silicon nitride.
Further, the mass ratio of the aluminum oxide to the silicon nitride is 1:1.
Preferably, in the third step, the curing condition is that the material is cured for 20-30 hours at normal temperature, then sent into a drying room, heated to 160 ℃ at the speed of 35-40 ℃/h, kept for 2-4 hours, and finally heated to 350 ℃ at the speed of 35-40 ℃/h, and kept for 3-5 hours.
Compared with the prior art, the invention has the following beneficial effects:
The valve plate is prepared by casting, compaction and solidification of slurry; the raw materials for preparing the slurry comprise polyvinyl alcohol, sodium carboxymethyl cellulose, silicate cement, river sand, expanded perlite, wood fiber, glass fiber and inorganic wear-resistant materials, and the addition of the inorganic wear-resistant materials can effectively improve the wear resistance of the valve plate; the mechanical strength and the crack resistance of the valve plate can be effectively improved by adding wood fibers and glass fibers; the expanded perlite has the characteristics of light weight and heat insulation, and the addition of the expanded perlite can effectively improve the heat insulation performance of the valve plate and reduce the weight of the valve plate; the addition of polyvinyl alcohol and sodium carboxymethyl cellulose can improve the bonding strength of slurry, improve the bonding strength of silicate cement, river sand, expanded perlite and the like, and further improve the mechanical strength and wear resistance of the valve plate;
The polyvinyl alcohol is modified polyvinyl alcohol, under the action of an initiator, anionic polar group sulfonic acid groups and hydrophilic polyether side chains are introduced into a polyvinyl alcohol molecular chain, the anionic polar group sulfonic acid groups are adsorbed on the surfaces of cement particles, electrostatic repulsion can be provided, the cement particles are mutually dispersed, the hydrophilic polyether side chains can generate steric hindrance effect among the cement particles, the agglomeration resistance among the cement particles is increased, the dispersing effect of the cement particles can be improved by the anionic polar group sulfonic acid groups and the hydrophilic polyether side chains, the adequate hydration of the cement particles in slurry is promoted, and the mechanical strength, the crack resistance and the wear resistance of a valve plate are further improved;
When the valve plate is applied to a high-temperature environment, modified polyvinyl alcohol, sodium carboxymethyl cellulose and wood fibers are carbonized and decomposed to generate gaps, an expansion space can be provided for the valve plate, the phenomenon that the valve plate cracks due to thermal expansion in the high-temperature environment is prevented, the high-temperature resistance of the valve plate is further improved, and the service life of the valve plate is prolonged;
The expanded perlite is hydrophobically modified expanded perlite, and the introduced organic fluoride can improve the hydrophobicity of the expanded perlite, overcome the excessive water absorption of the expanded perlite caused by a loose and porous structure, and reduce the unit water consumption and the slurry curing time during slurry preparation.
Drawings
FIG. 1 is a flow chart of a preparation process of a high-temperature-resistant and wear-resistant valve plate in the invention;
FIG. 2 is a plot of the wear resistance test results of the high temperature and wear resistant valve plates made in examples 1-5 and comparative examples 1-3 of the present invention;
FIG. 3 is a plot of total split area test results per unit area for the high temperature resistant and wear resistant valve plates made in examples 1-5 and comparative examples 1-3 of the present invention when measuring high temperature resistance;
FIG. 4 is a line graph showing the maximum crack width test results of the high temperature resistant and abrasion resistant valve plates prepared in examples 1 to 5 and comparative examples 1 to 3 according to the present invention when the high temperature resistance is measured.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
Example 1
As shown in fig. 1, the embodiment discloses a preparation method of a high-temperature-resistant and wear-resistant valve plate, which comprises the following steps:
Adding polyvinyl alcohol into deionized water, wherein the mass ratio of the polyvinyl alcohol to the deionized water is 1:100, stirring for 2 hours at 70 ℃ at the stirring speed of 100r/min, and cooling to room temperature to obtain a polyvinyl alcohol solution;
Adding 2-acrylamide-2-methylpropanesulfonic acid and triethylene glycol diacrylate into deionized water, wherein the mass ratio of the 2-acrylamide-2-methylpropanesulfonic acid to the triethylene glycol diacrylate to the deionized water is 2.1:2.6:100, stirring for 40min at a stirring speed of 300r/min, and then dropwise adding 1mol/L sodium hydroxide solution to adjust the pH value to 7.0 to obtain a modifier solution;
Mixing a polyvinyl alcohol solution with a modifier solution, heating to 50 ℃ at a stirring speed of 100r/min, adding 0.05mol/L potassium persulfate aqueous solution, reacting for 4 hours at a temperature of 75 ℃ with a mass ratio of 100:10:0.5 of the polyvinyl alcohol solution to the modifier solution, adding acetone with a mass 2 times that of the reaction mixture into the obtained reaction mixture for precipitation, filtering, taking a filtered residue, washing the filtered residue with acetone for 3 times, washing the filtered residue with ice water for 3 times at a temperature of 0 ℃, and drying the washed filtered residue in a vacuum drying box at a temperature of 50 ℃ for 8 hours to obtain modified polyvinyl alcohol;
Adding modified polyvinyl alcohol and sodium carboxymethylcellulose into water, stirring for 2 hours at the temperature of 70 ℃ at the stirring speed of 100r/min, cooling to room temperature, adding silicate cement, river sand, hydrophobically modified expanded perlite, wood fiber, glass fiber, aluminum oxide and silicon nitride, mixing, and stirring for 2 hours at the stirring speed of 100r/min to obtain slurry;
Wherein the mass ratio of the modified polyvinyl alcohol to the sodium carboxymethyl cellulose to the water to the silicate cement to the river sand to the hydrophobically modified expanded perlite to the wood fiber to the glass fiber to the aluminum oxide to the silicon nitride is 8:5:300:350:650:60:10:8:5:5:5;
the hydrophobically modified expanded perlite is prepared by the following steps:
Adding gamma-methacryloxypropyl trimethoxy silane into a 95wt% ethanol water solution, stirring for 1h at a stirring speed of 300r/min, adding expanded perlite, wherein the mass ratio of the expanded perlite to the 95wt% ethanol water solution to the gamma-methacryloxypropyl trimethoxy silane is 50:300:10, reacting for 3h at 60 ℃, filtering after the reaction is finished, washing with deionized water, and drying in a 50 ℃ vacuum drying oven for 10h to obtain alkenyl modified expanded perlite;
Dissolving sodium dodecyl benzene sulfonate and AEO-9 in deionized water to obtain a composite emulsifier solution, adding alkenyl modified expanded perlite into the composite emulsifier solution, heating to 80 ℃ at the stirring speed of 300r/min to obtain a mixed system, simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 1/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 1/15 of the mass of potassium persulfate aqueous solution into the mixed system, wherein the dropwise adding speed is within 20min, and reacting for 20min at the temperature of 80 ℃ after the dropwise adding is completed to obtain seed emulsion;
Simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 3/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 13/15 of the mass of 10wt% of potassium persulfate aqueous solution into the seed emulsion, wherein the dropwise adding speed is within 2 hours, continuing to react for 2.5 hours at 80 ℃ after the dropwise adding is finished, adding 10wt% of potassium persulfate aqueous solution accounting for 1/15 of the mass of 10wt% of potassium persulfate aqueous solution, reacting for 30 minutes again at 80 ℃, cooling to room temperature after the reaction is finished, filtering, washing with deionized water, and drying in a vacuum drying oven at 50 ℃ for 10 hours to obtain the hydrophobically modified expanded perlite;
Wherein, the mass ratio of the hexafluorobutyl methacrylate to the sodium dodecyl benzene sulfonate to the AEO-9 to the deionized water to the alkenyl modified expanded perlite to the 10wt% potassium persulfate aqueous solution is 100:3:3:1000:150:80;
pouring the slurry into a mould, vibrating, curing for 20 hours at normal temperature, then sending into a drying room, heating to 160 ℃ at a speed of 35 ℃/h, keeping for 2 hours, and finally heating to 350 ℃ at a speed of 35 ℃/h, and keeping for 5 hours to obtain the high-temperature-resistant and wear-resistant valve plate.
Example 2
The embodiment discloses a preparation method of a high-temperature-resistant and wear-resistant valve plate, which comprises the following steps:
Adding polyvinyl alcohol into deionized water, wherein the mass ratio of the polyvinyl alcohol to the deionized water is 3:100, stirring for 1h at 80 ℃ at the stirring speed of 200r/min, and cooling to room temperature to obtain a polyvinyl alcohol solution;
Adding 2-acrylamide-2-methylpropanesulfonic acid and triethylene glycol diacrylate into deionized water, wherein the mass ratio of the 2-acrylamide-2-methylpropanesulfonic acid to the triethylene glycol diacrylate to the deionized water is 2.2:2.8:100, stirring for 20min at a stirring speed of 500r/min, and then dropwise adding 2mol/L sodium hydroxide solution to adjust the pH value to 7.5 to obtain a modifier solution;
Mixing a polyvinyl alcohol solution with a modifier solution, heating to 55 ℃ at a stirring speed of 200r/min, adding 0.05mol/L potassium persulfate aqueous solution, reacting at a temperature of 95 ℃ for 2 hours with a mass ratio of the polyvinyl alcohol solution to the modifier solution to 0.05mol/L potassium persulfate aqueous solution of 100:15:1, adding acetone with the mass of 2 times of the reaction mixture into the obtained reaction mixture for precipitation, filtering, taking a filtering residue, washing the filtering residue with acetone for 3 times, washing with ice water for 3 times at 0 ℃, and placing the washed filtering residue in a vacuum drying oven at 50 ℃ for 8 hours to obtain modified polyvinyl alcohol;
Adding modified polyvinyl alcohol and sodium carboxymethylcellulose into water, stirring for 1h at the temperature of 80 ℃ at the stirring speed of 200r/min, cooling to room temperature, adding silicate cement, river sand, hydrophobically modified expanded perlite, wood fiber, glass fiber, aluminum oxide and silicon nitride, mixing, and stirring for 1h at the stirring speed of 200r/min to obtain slurry;
Wherein the mass ratio of the modified polyvinyl alcohol to the sodium carboxymethyl cellulose to the water to the silicate cement to the river sand to the hydrophobically modified expanded perlite to the wood fiber to the glass fiber to the aluminum oxide to the silicon nitride is 12:10:400:450:750:100:15:12:7.5:7.5:7.5;
the hydrophobically modified expanded perlite is prepared by the following steps:
Adding gamma-methacryloxypropyl trimethoxy silane into a 95wt% ethanol water solution, stirring for 1h at a stirring speed of 300r/min, adding expanded perlite, wherein the mass ratio of the expanded perlite to the 95wt% ethanol water solution to the gamma-methacryloxypropyl trimethoxy silane is 50:500:20, reacting for 2h at 70 ℃, filtering after the reaction is finished, washing with deionized water, and drying in a 50 ℃ vacuum drying oven for 10h to obtain alkenyl modified expanded perlite;
Dissolving sodium dodecyl benzene sulfonate and AEO-9 in deionized water to obtain a composite emulsifier solution, adding alkenyl modified expanded perlite into the composite emulsifier solution, heating to 85 ℃ at the stirring speed of 300r/min to obtain a mixed system, simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 1/3 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 2/15 of the mass of potassium persulfate aqueous solution into the mixed system, wherein the dropwise adding speed is within 30min, and reacting for 10min at the temperature of 85 ℃ after the dropwise adding is completed to obtain seed emulsion;
simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 2/3 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 10/15 of the mass of potassium persulfate aqueous solution into the seed emulsion, wherein the dropwise adding speed is that the dropwise adding is completed within 2 hours, continuing to react for 1.5 hours at the temperature of 85 ℃ after the dropwise adding is completed, adding 10wt% of potassium persulfate aqueous solution accounting for 3/15 of the mass of 10wt% of potassium persulfate aqueous solution, reacting for 20 minutes again at the temperature of 85 ℃, cooling to room temperature after the reaction is completed, filtering, washing with deionized water, and drying in a vacuum drying oven at 50 ℃ for 10 hours to obtain the hydrophobically modified expanded perlite;
Wherein, the mass ratio of the hexafluorobutyl methacrylate to the sodium dodecyl benzene sulfonate to the AEO-9 to the deionized water to the alkenyl modified expanded perlite to the 10wt% potassium persulfate aqueous solution is 150:5:5:2000:250:100;
pouring the slurry into a mould, vibrating, curing for 30 hours at normal temperature, then sending into a drying room, heating to 160 ℃ at a speed of 40 ℃/h, keeping for 4 hours, and finally heating to 350 ℃ at a speed of 35 ℃/h, and keeping for 3 hours to obtain the high-temperature-resistant and wear-resistant valve plate.
Example 3
The embodiment discloses a preparation method of a high-temperature-resistant and wear-resistant valve plate, which comprises the following steps:
adding polyvinyl alcohol into deionized water, wherein the mass ratio of the polyvinyl alcohol to the deionized water is 1.5:100, stirring for 1.5h at the temperature of 75 ℃ at the stirring speed of 150r/min, and cooling to room temperature to obtain a polyvinyl alcohol solution;
Adding 2-acrylamide-2-methylpropanesulfonic acid and triethylene glycol diacrylate into deionized water, wherein the mass ratio of the 2-acrylamide-2-methylpropanesulfonic acid to the triethylene glycol diacrylate to the deionized water is 2.15:2.65:100, stirring for 30min at a stirring speed of 400r/min, and then dropwise adding 1.5mol/L sodium hydroxide solution to adjust the pH value to 7 to obtain a modifier solution;
Mixing a polyvinyl alcohol solution with a modifier solution, heating to 50 ℃ at a stirring speed of 150r/min, adding 0.05mol/L potassium persulfate aqueous solution, reacting at a temperature of 85 ℃ for 3 hours with a mass ratio of 100:11:0.6 of the polyvinyl alcohol solution, the modifier solution and the 0.05mol/L potassium persulfate aqueous solution, adding acetone with the mass 2 times of the reaction mixture into the obtained reaction mixture for precipitation, filtering, taking a filtering residue, washing the filtering residue with acetone for 3 times, washing with ice water for 3 times, and placing the washed filtering residue in a vacuum drying box at 50 ℃ for drying for 8 hours to obtain modified polyvinyl alcohol;
adding modified polyvinyl alcohol and sodium carboxymethylcellulose into water, stirring for 1.5 hours at the temperature of 80 ℃ at the stirring speed of 150r/min, cooling to room temperature, adding silicate cement, river sand, hydrophobically modified expanded perlite, wood fiber, glass fiber, aluminum oxide and silicon nitride, mixing, and stirring for 1.5 hours at the stirring speed of 150r/min to obtain slurry;
Wherein the mass ratio of the modified polyvinyl alcohol to the sodium carboxymethyl cellulose to the water to the silicate cement to the river sand to the hydrophobically modified expanded perlite to the wood fiber to the glass fiber to the aluminum oxide to the silicon nitride is 9:6:320:370:670:70:11:9:6:6;
the hydrophobically modified expanded perlite is prepared by the following steps:
Adding gamma-methacryloxypropyl trimethoxy silane into a 95wt% ethanol water solution, stirring for 1h at a stirring speed of 300r/min, adding expanded perlite, wherein the mass ratio of the expanded perlite to the 95wt% ethanol water solution to the gamma-methacryloxypropyl trimethoxy silane is 50:350:12, reacting for 2.5h at 65 ℃, filtering after the reaction is finished, washing with deionized water, and drying in a vacuum drying oven at 50 ℃ for 10h to obtain alkenyl modified expanded perlite;
Dissolving sodium dodecyl benzene sulfonate and AEO-9 in deionized water to obtain a composite emulsifier solution, adding alkenyl modified expanded perlite into the composite emulsifier solution, heating to 85 ℃ at the stirring speed of 300r/min to obtain a mixed system, simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 1/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 1.5/15 of the mass of potassium persulfate aqueous solution into the mixed system, wherein the dropwise adding speed is within 30min, and reacting for 10min at the temperature of 85 ℃ after the dropwise adding is completed to obtain seed emulsion;
Simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 3/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 11/15 of the mass of 10wt% of potassium persulfate aqueous solution into the seed emulsion, wherein the dropwise adding speed is within 2 hours, continuing to react for 1.5 hours at the temperature of 85 ℃ after the dropwise adding is finished, adding 10wt% of potassium persulfate aqueous solution accounting for 2.5/15 of the mass of 10wt% of potassium persulfate aqueous solution, reacting for 20 minutes again at the temperature of 85 ℃, cooling to room temperature after the reaction is finished, filtering, washing with deionized water, and drying in a vacuum drying oven at 50 ℃ for 10 hours to obtain the hydrophobically modified expanded perlite;
wherein, the mass ratio of the hexafluorobutyl methacrylate to the sodium dodecyl benzene sulfonate to the AEO-9 to the deionized water to the alkenyl modified expanded perlite to the 10wt% potassium persulfate aqueous solution is 110:3.5:3.5:1200:170:85;
Pouring the slurry into a mould, vibrating, curing for 25 hours at normal temperature, then sending into a drying room, heating to 160 ℃ at a speed of 40 ℃/h, keeping for 3 hours, and finally heating to 350 ℃ at a speed of 35 ℃/h, and keeping for 4 hours to obtain the high-temperature-resistant and wear-resistant valve plate.
Example 4
The embodiment discloses a preparation method of a high-temperature-resistant and wear-resistant valve plate, which comprises the following steps:
Adding polyvinyl alcohol into deionized water, wherein the mass ratio of the polyvinyl alcohol to the deionized water is 2:100, stirring for 1.5h at the temperature of 75 ℃ at the stirring speed of 150r/min, and cooling to room temperature to obtain a polyvinyl alcohol solution;
Adding 2-acrylamide-2-methylpropanesulfonic acid and triethylene glycol diacrylate into deionized water, wherein the mass ratio of the 2-acrylamide-2-methylpropanesulfonic acid to the triethylene glycol diacrylate to the deionized water is 2.15:2.7:100, stirring for 30min at a stirring speed of 400r/min, and then dropwise adding 1.5mol/L sodium hydroxide solution to adjust the pH value to 7 to obtain a modifier solution;
Mixing a polyvinyl alcohol solution with a modifier solution, heating to 50 ℃ at a stirring speed of 150r/min, adding 0.05mol/L potassium persulfate aqueous solution, reacting for 3 hours at a temperature of 85 ℃ with a mass ratio of the polyvinyl alcohol solution to the modifier solution to 0.05mol/L potassium persulfate aqueous solution of 100:12.5:0.75, adding acetone with a mass 2 times that of the reaction mixture into the obtained reaction mixture for precipitation, filtering, taking a filtering residue, washing the filtering residue with acetone for 3 times, washing with ice water for 3 times at a temperature of 0 ℃, and drying the washed filtering residue in a vacuum drying oven at a temperature of 50 ℃ for 8 hours to obtain modified polyvinyl alcohol;
adding modified polyvinyl alcohol and sodium carboxymethylcellulose into water, stirring for 1.5 hours at the temperature of 80 ℃ at the stirring speed of 150r/min, cooling to room temperature, adding silicate cement, river sand, hydrophobically modified expanded perlite, wood fiber, glass fiber, aluminum oxide and silicon nitride, mixing, and stirring for 1.5 hours at the stirring speed of 150r/min to obtain slurry;
Wherein the mass ratio of the modified polyvinyl alcohol to the sodium carboxymethyl cellulose to the water to the silicate cement to the river sand to the hydrophobically modified expanded perlite to the wood fiber to the glass fiber to the aluminum oxide to the silicon nitride is 10:7.5:350:400:700:80:12.5:10:6.5:6.5;
the hydrophobically modified expanded perlite is prepared by the following steps:
Adding gamma-methacryloxypropyl trimethoxy silane into a 95wt% ethanol water solution, stirring for 1h at a stirring speed of 300r/min, adding expanded perlite, wherein the mass ratio of the expanded perlite to the 95wt% ethanol water solution to the gamma-methacryloxypropyl trimethoxy silane is 50:400:15, reacting for 2.5h at 65 ℃, filtering after the reaction is finished, washing with deionized water, and drying in a vacuum drying oven at 50 ℃ for 10h to obtain alkenyl modified expanded perlite;
Dissolving sodium dodecyl benzene sulfonate and AEO-9 in deionized water to obtain a composite emulsifier solution, adding alkenyl modified expanded perlite into the composite emulsifier solution, heating to 85 ℃ at the stirring speed of 300r/min to obtain a mixed system, simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 1/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 1.5/15 of the mass of potassium persulfate aqueous solution into the mixed system, wherein the dropwise adding speed is within 30min, and reacting for 10min at the temperature of 85 ℃ after the dropwise adding is completed to obtain seed emulsion;
Simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 3/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 11/15 of the mass of 10wt% of potassium persulfate aqueous solution into the seed emulsion, wherein the dropwise adding speed is within 2 hours, continuing to react for 1.5 hours at the temperature of 85 ℃ after the dropwise adding is finished, adding 10wt% of potassium persulfate aqueous solution accounting for 2.5/15 of the mass of 10wt% of potassium persulfate aqueous solution, reacting for 20 minutes again at the temperature of 85 ℃, cooling to room temperature after the reaction is finished, filtering, washing with deionized water, and drying in a vacuum drying oven at 50 ℃ for 10 hours to obtain the hydrophobically modified expanded perlite;
Wherein the mass ratio of the hexafluorobutyl methacrylate to the sodium dodecyl benzene sulfonate to the AEO-9 to the deionized water to the alkenyl modified expanded perlite to the 10wt% potassium persulfate aqueous solution is 125:4:4:1500:200:90;
Pouring the slurry into a mould, vibrating, curing for 25 hours at normal temperature, then sending into a drying room, heating to 160 ℃ at a speed of 40 ℃/h, keeping for 3 hours, and finally heating to 350 ℃ at a speed of 35 ℃/h, and keeping for 4 hours to obtain the high-temperature-resistant and wear-resistant valve plate.
Example 5
The embodiment discloses a preparation method of a high-temperature-resistant and wear-resistant valve plate, which comprises the following steps:
Adding polyvinyl alcohol into deionized water, wherein the mass ratio of the polyvinyl alcohol to the deionized water is 2.5:100, stirring for 1.5h at the temperature of 75 ℃ at the stirring speed of 150r/min, and cooling to room temperature to obtain a polyvinyl alcohol solution;
adding 2-acrylamide-2-methylpropanesulfonic acid and triethylene glycol diacrylate into deionized water, wherein the mass ratio of the 2-acrylamide-2-methylpropanesulfonic acid to the triethylene glycol diacrylate to the deionized water is 2.15:2.75:100, stirring for 30min at a stirring speed of 400r/min, and then dropwise adding 1.5mol/L sodium hydroxide solution to adjust the pH value to 7 to obtain a modifier solution;
Mixing a polyvinyl alcohol solution with a modifier solution, heating to 50 ℃ at a stirring speed of 150r/min, adding 0.05mol/L potassium persulfate aqueous solution, reacting at a temperature of 85 ℃ for 3 hours with a mass ratio of 100:14:0.9 of the polyvinyl alcohol solution, the modifier solution and the 0.05mol/L potassium persulfate aqueous solution, adding acetone with the mass 2 times of the reaction mixture into the obtained reaction mixture for precipitation, filtering, taking a filtering residue, washing the filtering residue with acetone for 3 times, washing with ice water for 3 times, and placing the washed filtering residue in a vacuum drying box at 50 ℃ for drying for 8 hours to obtain modified polyvinyl alcohol;
adding modified polyvinyl alcohol and sodium carboxymethylcellulose into water, stirring for 1.5 hours at the temperature of 80 ℃ at the stirring speed of 150r/min, cooling to room temperature, adding silicate cement, river sand, hydrophobically modified expanded perlite, wood fiber, glass fiber, aluminum oxide and silicon nitride, mixing, and stirring for 1.5 hours at the stirring speed of 150r/min to obtain slurry;
Wherein the mass ratio of the modified polyvinyl alcohol to the sodium carboxymethyl cellulose to the water to the silicate cement to the river sand to the hydrophobically modified expanded perlite to the wood fiber to the glass fiber to the aluminum oxide to the silicon nitride is 11:9:380:420:730:90:14:11:7:7:7;
the hydrophobically modified expanded perlite is prepared by the following steps:
Adding gamma-methacryloxypropyl trimethoxy silane into a 95wt% ethanol water solution, stirring for 1h at a stirring speed of 300r/min, adding expanded perlite, wherein the mass ratio of the expanded perlite to the 95wt% ethanol water solution to the gamma-methacryloxypropyl trimethoxy silane is 50:450:18, reacting for 2.5h at 65 ℃, filtering after the reaction is finished, washing with deionized water, and drying in a vacuum drying oven at 50 ℃ for 10h to obtain alkenyl modified expanded perlite;
Dissolving sodium dodecyl benzene sulfonate and AEO-9 in deionized water to obtain a composite emulsifier solution, adding alkenyl modified expanded perlite into the composite emulsifier solution, heating to 85 ℃ at the stirring speed of 300r/min to obtain a mixed system, simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 1/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 1.5/15 of the mass of potassium persulfate aqueous solution into the mixed system, wherein the dropwise adding speed is within 30min, and reacting for 10min at the temperature of 85 ℃ after the dropwise adding is completed to obtain seed emulsion;
Simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 3/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 11/15 of the mass of 10wt% of potassium persulfate aqueous solution into the seed emulsion, wherein the dropwise adding speed is within 2 hours, continuing to react for 1.5 hours at the temperature of 85 ℃ after the dropwise adding is finished, adding 10wt% of potassium persulfate aqueous solution accounting for 2.5/15 of the mass of 10wt% of potassium persulfate aqueous solution, reacting for 20 minutes again at the temperature of 85 ℃, cooling to room temperature after the reaction is finished, filtering, washing with deionized water, and drying in a vacuum drying oven at 50 ℃ for 10 hours to obtain the hydrophobically modified expanded perlite;
wherein, the mass ratio of the hexafluorobutyl methacrylate to the sodium dodecyl benzene sulfonate to the AEO-9 to the deionized water to the alkenyl modified expanded perlite to the 10wt% potassium persulfate aqueous solution is 140:4.5:4.5:1800:230:95;
Pouring the slurry into a mould, vibrating, curing for 25 hours at normal temperature, then sending into a drying room, heating to 160 ℃ at a speed of 40 ℃/h, keeping for 3 hours, and finally heating to 350 ℃ at a speed of 35 ℃/h, and keeping for 4 hours to obtain the high-temperature-resistant and wear-resistant valve plate.
Comparative example 1
The comparative example discloses a preparation method of a high-temperature-resistant and wear-resistant valve plate, which comprises the following steps:
Adding polyvinyl alcohol into deionized water, wherein the mass ratio of the polyvinyl alcohol to the deionized water is 1:100, stirring for 2 hours at 70 ℃ at the stirring speed of 100r/min, and cooling to room temperature to obtain a polyvinyl alcohol solution;
Adding 2-acrylamide-2-methylpropanesulfonic acid and triethylene glycol diacrylate into deionized water, wherein the mass ratio of the 2-acrylamide-2-methylpropanesulfonic acid to the triethylene glycol diacrylate to the deionized water is 2.1:2.6:100, stirring for 40min at a stirring speed of 300r/min, and then dropwise adding 1mol/L sodium hydroxide solution to adjust the pH value to 7.0 to obtain a modifier solution;
Mixing a polyvinyl alcohol solution with a modifier solution, heating to 50 ℃ at a stirring speed of 100r/min, adding 0.05mol/L potassium persulfate aqueous solution, reacting for 4 hours at a temperature of 75 ℃ with a mass ratio of 100:10:0.5 of the polyvinyl alcohol solution to the modifier solution, adding acetone with a mass 2 times that of the reaction mixture into the obtained reaction mixture for precipitation, filtering, taking a filtered residue, washing the filtered residue with acetone for 3 times, washing the filtered residue with ice water for 3 times at a temperature of 0 ℃, and drying the washed filtered residue in a vacuum drying box at a temperature of 50 ℃ for 8 hours to obtain modified polyvinyl alcohol;
Adding modified polyvinyl alcohol and sodium carboxymethylcellulose into water, stirring for 2 hours at the temperature of 70 ℃ at the stirring speed of 100r/min, cooling to room temperature, adding silicate cement, river sand, hydrophobically modified expanded perlite, wood fiber and glass fiber, mixing, and stirring for 2 hours at the stirring speed of 100r/min to obtain slurry;
Wherein, the mass ratio of the modified polyvinyl alcohol to the sodium carboxymethyl cellulose to the water to the silicate cement to the river sand to the hydrophobically modified expanded perlite to the wood fiber to the glass fiber is 8:5:300:350:650:60:10:8;
the hydrophobically modified expanded perlite is prepared by the following steps:
Adding gamma-methacryloxypropyl trimethoxy silane into a 95wt% ethanol water solution, stirring for 1h at a stirring speed of 300r/min, adding expanded perlite, wherein the mass ratio of the expanded perlite to the 95wt% ethanol water solution to the gamma-methacryloxypropyl trimethoxy silane is 50:300:10, reacting for 3h at 60 ℃, filtering after the reaction is finished, washing with deionized water, and drying in a 50 ℃ vacuum drying oven for 10h to obtain alkenyl modified expanded perlite;
Dissolving sodium dodecyl benzene sulfonate and AEO-9 in deionized water to obtain a composite emulsifier solution, adding alkenyl modified expanded perlite into the composite emulsifier solution, heating to 80 ℃ at the stirring speed of 300r/min to obtain a mixed system, simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 1/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 1/15 of the mass of potassium persulfate aqueous solution into the mixed system, wherein the dropwise adding speed is within 20min, and reacting for 20min at the temperature of 80 ℃ after the dropwise adding is completed to obtain seed emulsion;
Simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 3/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 13/15 of the mass of 10wt% of potassium persulfate aqueous solution into the seed emulsion, wherein the dropwise adding speed is within 2 hours, continuing to react for 2.5 hours at 80 ℃ after the dropwise adding is finished, adding 10wt% of potassium persulfate aqueous solution accounting for 1/15 of the mass of 10wt% of potassium persulfate aqueous solution, reacting for 30 minutes again at 80 ℃, cooling to room temperature after the reaction is finished, filtering, washing with deionized water, and drying in a vacuum drying oven at 50 ℃ for 10 hours to obtain the hydrophobically modified expanded perlite;
Wherein, the mass ratio of the hexafluorobutyl methacrylate to the sodium dodecyl benzene sulfonate to the AEO-9 to the deionized water to the alkenyl modified expanded perlite to the 10wt% potassium persulfate aqueous solution is 100:3:3:1000:150:80;
pouring the slurry into a mould, vibrating, curing for 20 hours at normal temperature, then sending into a drying room, heating to 160 ℃ at a speed of 35 ℃/h, keeping for 2 hours, and finally heating to 350 ℃ at a speed of 35 ℃/h, and keeping for 5 hours to obtain the high-temperature-resistant and wear-resistant valve plate.
Comparative example 2
The comparative example discloses a preparation method of a high-temperature-resistant and wear-resistant valve plate, which comprises the following steps:
Adding polyvinyl alcohol and sodium carboxymethylcellulose into water, stirring for 2 hours at the temperature of 70 ℃ at the stirring speed of 100r/min, cooling to room temperature, adding silicate cement, river sand, hydrophobically modified expanded perlite, wood fiber and glass fiber, mixing, and stirring for 2 hours at the stirring speed of 100r/min to obtain slurry;
Wherein, the mass ratio of polyvinyl alcohol, sodium carboxymethyl cellulose, water, silicate cement, river sand, hydrophobically modified expanded perlite, wood fiber and glass fiber is 5.5:5:300:350:650:60:10:8;
the hydrophobically modified expanded perlite is prepared by the following steps:
Adding gamma-methacryloxypropyl trimethoxy silane into a 95wt% ethanol water solution, stirring for 1h at a stirring speed of 300r/min, adding expanded perlite, wherein the mass ratio of the expanded perlite to the 95wt% ethanol water solution to the gamma-methacryloxypropyl trimethoxy silane is 50:300:10, reacting for 3h at 60 ℃, filtering after the reaction is finished, washing with deionized water, and drying in a 50 ℃ vacuum drying oven for 10h to obtain alkenyl modified expanded perlite;
Dissolving sodium dodecyl benzene sulfonate and AEO-9 in deionized water to obtain a composite emulsifier solution, adding alkenyl modified expanded perlite into the composite emulsifier solution, heating to 80 ℃ at the stirring speed of 300r/min to obtain a mixed system, simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 1/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 1/15 of the mass of potassium persulfate aqueous solution into the mixed system, wherein the dropwise adding speed is within 20min, and reacting for 20min at the temperature of 80 ℃ after the dropwise adding is completed to obtain seed emulsion;
Simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 3/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 13/15 of the mass of 10wt% of potassium persulfate aqueous solution into the seed emulsion, wherein the dropwise adding speed is within 2 hours, continuing to react for 2.5 hours at 80 ℃ after the dropwise adding is finished, adding 10wt% of potassium persulfate aqueous solution accounting for 1/15 of the mass of 10wt% of potassium persulfate aqueous solution, reacting for 30 minutes again at 80 ℃, cooling to room temperature after the reaction is finished, filtering, washing with deionized water, and drying in a vacuum drying oven at 50 ℃ for 10 hours to obtain the hydrophobically modified expanded perlite;
Wherein, the mass ratio of the hexafluorobutyl methacrylate to the sodium dodecyl benzene sulfonate to the AEO-9 to the deionized water to the alkenyl modified expanded perlite to the 10wt% potassium persulfate aqueous solution is 100:3:3:1000:150:80;
Pouring the slurry into a mould, vibrating, curing for 20 hours at normal temperature, then sending into a drying room, heating to 160 ℃ at a speed of 35 ℃/h, keeping for 2 hours, and finally heating to 350 ℃ at a speed of 35 ℃/h, and keeping for 5 hours to obtain the high-temperature-resistant and wear-resistant valve plate.
Comparative example 3
The comparative example discloses a preparation method of a high-temperature-resistant and wear-resistant valve plate, which comprises the following steps:
Mixing water, portland cement, river sand, hydrophobically modified expanded perlite and glass fiber, and stirring at a stirring speed of 100r/min for 2 hours to obtain slurry;
Wherein the mass ratio of water to silicate cement to river sand to hydrophobically modified expanded perlite to glass fiber is 300:350:650:60:8;
the hydrophobically modified expanded perlite is prepared by the following steps:
Adding gamma-methacryloxypropyl trimethoxy silane into a 95wt% ethanol water solution, stirring for 1h at a stirring speed of 300r/min, adding expanded perlite, wherein the mass ratio of the expanded perlite to the 95wt% ethanol water solution to the gamma-methacryloxypropyl trimethoxy silane is 50:300:10, reacting for 3h at 60 ℃, filtering after the reaction is finished, washing with deionized water, and drying in a 50 ℃ vacuum drying oven for 10h to obtain alkenyl modified expanded perlite;
Dissolving sodium dodecyl benzene sulfonate and AEO-9 in deionized water to obtain a composite emulsifier solution, adding alkenyl modified expanded perlite into the composite emulsifier solution, heating to 80 ℃ at the stirring speed of 300r/min to obtain a mixed system, simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 1/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 1/15 of the mass of potassium persulfate aqueous solution into the mixed system, wherein the dropwise adding speed is within 20min, and reacting for 20min at the temperature of 80 ℃ after the dropwise adding is completed to obtain seed emulsion;
Simultaneously dropwise adding hexafluorobutyl methacrylate accounting for 3/4 of the mass of hexafluorobutyl methacrylate and 10wt% of potassium persulfate aqueous solution accounting for 13/15 of the mass of 10wt% of potassium persulfate aqueous solution into the seed emulsion, wherein the dropwise adding speed is within 2 hours, continuing to react for 2.5 hours at 80 ℃ after the dropwise adding is finished, adding 10wt% of potassium persulfate aqueous solution accounting for 1/15 of the mass of 10wt% of potassium persulfate aqueous solution, reacting for 30 minutes again at 80 ℃, cooling to room temperature after the reaction is finished, filtering, washing with deionized water, and drying in a vacuum drying oven at 50 ℃ for 10 hours to obtain the hydrophobically modified expanded perlite;
Wherein, the mass ratio of the hexafluorobutyl methacrylate to the sodium dodecyl benzene sulfonate to the AEO-9 to the deionized water to the alkenyl modified expanded perlite to the 10wt% potassium persulfate aqueous solution is 100:3:3:1000:150:80;
Pouring the slurry into a mould, vibrating, curing for 20 hours at normal temperature, then sending into a drying room, heating to 160 ℃ at a speed of 35 ℃/h, keeping for 2 hours, and finally heating to 350 ℃ at a speed of 35 ℃/h, and keeping for 5 hours to obtain the high-temperature-resistant and wear-resistant valve plate.
In the above examples and comparative examples, the polyvinyl alcohol was polyvinyl alcohol 1788 (polymerization degree 1700, alcoholysis degree 88%), and the manufacturer: an inner mongolian double-euphoria environmental protection material stock limited company; 2-acrylamide-2-methylpropanesulfonic acid was purchased from Guangdong Weng Jiang chemical Co., ltd., CAS number: 15214-89-8; triethylene glycol diacrylate was purchased from Guangdong Santa paint New Material Co., ltd., product number: l-61029 (TEGDA), CAS number: 1680-21-3; sodium carboxymethyl cellulose was purchased from Shanghai Wanzhen fine chemical Co., ltd., cat: 0001, content not less than 99.9%, CAS number: 9004-32-4; portland cement is purchased from Jiande conch Cement Limited liability company, model: p.c32.s; river sand is purchased from a mineral product processing factory in Lingshu county, and has the particle size: 10-20 meshes; expanded perlite is purchased from the company's sony perlite applications limited, xinyang city, particle size: 0.1-1.5 mesh; wood fiber was purchased from Lingshou prefecture long-pass building materials factory, cat No.: 067; the glass fiber is chopped glass fiber and is purchased from Hangzhou Gaokou composite material Co., ltd., model: EC, average length: 1cm; aluminum oxide is purchased from Guangzhou Beacon chemical technology Co., ltd., particle size: 800 mesh; silicon nitride is purchased from the NOT-FIG welding materials Co., ltd., product number: 842566, particle size: 300 mesh.
Test examples
Performance tests were performed on the valve plates produced in examples 1 to 5 and comparative examples 1 to 3:
(1) Abrasion resistance test:
The valve plates obtained in examples 1 to 5 and comparative examples 1 to 3 were cut into cylindrical test pieces having a diameter of 23mm and a height of 60mm, the test pieces were placed on a jig of a tester, a weight having a load of 4.1kg was applied to the test pieces, the test pieces were rubbed against the surfaces of the test pieces by an abrasive disk having a diameter of 52.5cm and rotated at a constant speed about a central axis at a speed of 32r/min (brown fused alumina having a particle diameter of 0.5 mm), and the abrasion values per unit area of the test pieces after 100 revolutions of the grinding were measured, and the measurement results were shown in Table 1:
TABLE 1
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Abrasion value (g/cm 2) | 0.0431 | 0.0319 | 0.0401 | 0.0397 | 0.0353 | 0.0564 | 0.0627 | 0.0894 |
As can be seen from Table 1, the valve plate prepared by the invention has good wear resistance. The addition of the inorganic wear-resistant materials of aluminum oxide and silicon nitride can effectively improve the wear resistance of the valve plate, the addition of the modified polyvinyl alcohol and sodium carboxymethyl cellulose can improve the bonding strength of slurry, improve the bonding strength of silicate cement, river sand, hydrophobic modified expanded perlite and the like, enhance the wear resistance of the valve plate, introduce anionic polar group sulfonic acid groups and hydrophilic polyether side chains on the modified polyvinyl alcohol molecular chain, improve the dispersing effect of cement particles, promote the hydration of cement particles in the slurry to be sufficient, and further improve the wear resistance of the valve plate. Compared with example 1, the wear resistance of the valve plate is reduced without adding inorganic wear-resistant materials such as aluminum oxide and silicon nitride in comparative example 1; compared with comparative example 1, in comparative example 2, inorganic wear-resistant materials such as aluminum oxide and silicon nitride are not added, polyvinyl alcohol is not subjected to modification treatment, the dispersing effect of cement particles is reduced, and the wear resistance of the valve plate is further reduced; compared with comparative example 2, the bonding strength of silicate cement, river sand, hydrophobically modified expanded perlite and the like in slurry is reduced and the wear resistance of the valve plate is the lowest without adding polyvinyl alcohol and sodium carboxymethyl cellulose in comparative example 3.
(2) High temperature resistance test: the valve plates prepared in examples 1 to 5 and comparative examples 1 to 3 were subjected to firing under simulated conditions at 1300 ℃ for 100 hours, and the high-temperature cracking conditions of the valve plates were measured, and the test results are shown in Table 2:
TABLE 2
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Total cleavage area per unit area (mm 2·m-2) | 138 | 117 | 132 | 127 | 121 | 139 | 151 | 183 |
| Maximum crack width (mm) | 0.24 | 0.18 | 0.23 | 0.21 | 0.19 | 0.24 | 0.31 | 0.45 |
As can be seen from Table 2, the valve plate prepared by the invention has good high-temperature cracking resistance. Due to the addition of organic compounds such as wood fiber, modified polyvinyl alcohol and sodium carboxymethyl cellulose, when the valve plate is applied to high-temperature environments such as a high-temperature kiln, the modified polyvinyl alcohol, sodium carboxymethyl cellulose and wood fiber can be carbonized to generate gaps, an expansion space can be provided for the valve plate, the phenomenon that the valve plate cracks when heated and expanded is prevented, and the high-temperature resistance of the valve plate is improved. Compared with the embodiment 1, the embodiment 1 has no inorganic wear-resistant materials of aluminum oxide and silicon nitride, and has little influence on the cracking condition of the valve plate in a high-temperature environment; compared with comparative example 1, the polyvinyl alcohol in comparative example 2 is not modified, the dispersing effect of cement particles is reduced, the bonding strength with river sand, hydrophobic modified expanded perlite and the like is reduced, and the cracking phenomenon is aggravated when the valve plate is heated and expanded; compared with comparative example 2, the comparative example 3 is free from adding polyvinyl alcohol, sodium carboxymethyl cellulose and wood fiber, cannot form a gap through carbonization at high temperature to provide an expansion space for the valve plate, and the bonding strength of silicate cement, river sand, hydrophobically modified expanded perlite and the like in slurry is further reduced, so that the cracking phenomenon is most obvious when the valve plate is heated and expanded.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The preparation method of the high-temperature-resistant and wear-resistant valve plate is characterized by comprising the following steps of:
Adding polyvinyl alcohol into deionized water, heating and stirring, and cooling to room temperature to obtain a polyvinyl alcohol solution;
Adding 2-acrylamide-2-methylpropanesulfonic acid and triethylene glycol diacrylate into deionized water, stirring and mixing, and then dropwise adding an alkaline solution to adjust the pH value to 7.0-7.5 to obtain a modifier solution;
Mixing a polyvinyl alcohol solution with a modifier solution, stirring and heating, adding an initiator solution, reacting, separating, purifying and drying after the reaction is finished to obtain modified polyvinyl alcohol;
Adding modified polyvinyl alcohol and sodium carboxymethylcellulose into deionized water, heating and stirring, cooling to room temperature, adding silicate cement, river sand, hydrophobic modified expanded perlite, wood fiber, glass fiber and inorganic wear-resistant material, mixing, and stirring to obtain slurry;
Wherein, the mass ratio of the modified polyvinyl alcohol to the sodium carboxymethyl cellulose to the deionized water to the silicate cement to the river sand to the hydrophobically modified expanded perlite to the wood fiber to the glass fiber to the inorganic wear-resistant material is (8-12), 5-10, 300-400, 350-450, 650-750, 60-100, 10-15, 8-12 and 10-15;
Inorganic wear-resistant materials include aluminum oxide and silicon nitride;
the hydrophobically modified expanded perlite is prepared by the following steps:
Adding gamma-methacryloxypropyl trimethoxy silane into an ethanol water solution, stirring, adding expanded perlite, reacting, filtering, washing and drying after the reaction is finished to obtain alkenyl modified expanded perlite;
Step (2), dissolving sodium dodecyl benzene sulfonate and AEO-9 in deionized water to obtain a composite emulsifier solution, adding alkenyl modified expanded perlite into the composite emulsifier solution, heating to a set temperature under stirring to obtain a mixed system, simultaneously dropwise adding a first part of hexafluorobutyl methacrylate and a first part of potassium persulfate aqueous solution into the mixed system, and reacting after the dropwise adding is finished to obtain seed emulsion;
simultaneously dripping a second part of hexafluorobutyl methacrylate and a second part of potassium persulfate aqueous solution into the seed emulsion, continuing to react after the dripping, adding a third part of potassium persulfate aqueous solution after the reaction is finished, reacting again, cooling after the reaction is finished, filtering, washing and drying to obtain the hydrophobically modified expanded perlite;
And thirdly, pouring the slurry into a mould, compacting, and solidifying to obtain the high-temperature-resistant and wear-resistant valve plate.
2. The method for preparing a high temperature and wear resistant valve plate according to claim 1, wherein in the first step, when the polyvinyl alcohol solution is prepared, the mass ratio of the polyvinyl alcohol to the deionized water is (1-3) 100, and the condition of heating and stirring is that stirring is carried out for 1-2 hours at 70-80 ℃ at a stirring speed of 100-200 r/min.
3. The method for preparing the high-temperature-resistant and wear-resistant valve plate according to claim 1, wherein in the first step, when the modifier solution is prepared, the mass ratio of the 2-acrylamide-2-methylpropanesulfonic acid, the triethylene glycol diacrylate and the deionized water is (2.1-2.2): (2.6-2.8): 100, and the stirring and mixing conditions are that stirring is carried out for 20-40min at a stirring speed of 300-500 r/min.
4. The method for preparing the high-temperature-resistant and wear-resistant valve plate according to claim 1, wherein in the first step, when the modified polyvinyl alcohol is prepared, the mass ratio of the polyvinyl alcohol solution, the modifier solution and the initiator solution is 100 (10-15) (0.5-1), the condition of stirring and heating is that the temperature is raised to 50-55 ℃ at the stirring speed of 100-200r/min, and the condition of reaction is that the temperature is 75-95 ℃ for 2-4h.
5. The method for preparing the high-temperature-resistant and wear-resistant valve plate according to claim 1, wherein in the step (1), the mass ratio of the expanded perlite to the ethanol aqueous solution to the gamma-methacryloxypropyl trimethoxysilane is 50 (300-500): 10-20), and the reaction condition is that the reaction is carried out for 2-3 hours at the temperature of 60-70 ℃;
In the step (2), the mass ratio of the aqueous solution of hexafluorobutyl methacrylate, sodium dodecyl benzene sulfonate, AEO-9, deionized water, alkenyl modified expanded perlite and potassium persulfate is (100-150): 3-5): 1000-2000): 150-250: 80-100; setting the temperature to be 80-85 ℃, reacting for 10-20min at the set temperature, continuing the reaction for 1.5-2.5h at the set temperature, and reacting for 20-30min at the set temperature again;
the first part of hexafluorobutyl methacrylate accounts for 1/4-1/3 of the mass of hexafluorobutyl methacrylate, the second part of hexafluorobutyl methacrylate accounts for 2/3-3/4 of the mass of hexafluorobutyl methacrylate, the first part of potassium persulfate aqueous solution accounts for 1/15-2/15 of the mass of potassium persulfate aqueous solution, the second part of potassium persulfate aqueous solution accounts for 10/15-13/15 of the mass of potassium persulfate aqueous solution, and the third part of potassium persulfate aqueous solution accounts for 1/15-3/15 of the mass of potassium persulfate aqueous solution.
6. The method for preparing the high-temperature-resistant and wear-resistant valve plate according to claim 1, wherein in the third step, the curing condition is that the material is cured for 20-30 hours at normal temperature, then sent into a drying room, heated to 160 ℃ at a speed of 35-40 ℃/h, kept for 2-4 hours, and finally heated to 350 ℃ at a speed of 35-40 ℃/h, and kept for 3-5 hours.
7. A high temperature resistant and wear resistant valve plate prepared by the method of preparing a high temperature resistant and wear resistant valve plate according to any one of claims 1-6.
8. Use of a high temperature resistant and wear resistant valve plate as claimed in claim 7 in a high temperature kiln.
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| CN108996948B (en) * | 2018-08-02 | 2021-01-26 | 江苏沃斯坦环保设备有限公司 | Preparation method of high-strength material for storage tank heat insulation |
| CN116789421A (en) * | 2023-08-28 | 2023-09-22 | 广东潮泰建设有限公司 | Waterproof thermal insulation mortar suitable for building inner wall and preparation method thereof |
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| CN115893940A (en) * | 2022-11-18 | 2023-04-04 | 浙江华滋奔腾建材有限公司 | High-crack-resistance concrete and construction method thereof |
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