CN116283245A - Environment-friendly plastic for CFB furnace and preparation process thereof - Google Patents
Environment-friendly plastic for CFB furnace and preparation process thereof Download PDFInfo
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- CN116283245A CN116283245A CN202211676357.2A CN202211676357A CN116283245A CN 116283245 A CN116283245 A CN 116283245A CN 202211676357 A CN202211676357 A CN 202211676357A CN 116283245 A CN116283245 A CN 116283245A
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- plastic
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- alumina
- cellulose
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- 239000004033 plastic Substances 0.000 title claims abstract description 52
- 229920003023 plastic Polymers 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 68
- 239000002994 raw material Substances 0.000 claims abstract description 48
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 23
- 229920002678 cellulose Polymers 0.000 claims abstract description 15
- 239000001913 cellulose Substances 0.000 claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 13
- 239000010703 silicon Substances 0.000 claims abstract description 13
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003906 humectant Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 50
- 238000010276 construction Methods 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 230000002745 absorbent Effects 0.000 claims description 10
- 239000002250 absorbent Substances 0.000 claims description 10
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 8
- 230000009970 fire resistant effect Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229920000609 methyl cellulose Polymers 0.000 claims description 7
- 239000001923 methylcellulose Substances 0.000 claims description 7
- 235000010981 methylcellulose Nutrition 0.000 claims description 7
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 6
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 6
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 6
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 6
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 6
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 6
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 229910052849 andalusite Inorganic materials 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 4
- 229920002385 Sodium hyaluronate Polymers 0.000 claims description 4
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 229920006037 cross link polymer Polymers 0.000 claims description 4
- 239000010443 kyanite Substances 0.000 claims description 4
- 229910052850 kyanite Inorganic materials 0.000 claims description 4
- -1 liquid paraffin Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229940010747 sodium hyaluronate Drugs 0.000 claims description 4
- YWIVKILSMZOHHF-QJZPQSOGSA-N sodium;(2s,3s,4s,5r,6r)-6-[(2s,3r,4r,5s,6r)-3-acetamido-2-[(2s,3s,4r,5r,6r)-6-[(2r,3r,4r,5s,6r)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-2-carboxy-4,5-dihydroxyoxan-3-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-3,4,5-trihydroxyoxane-2- Chemical compound [Na+].CC(=O)N[C@H]1[C@H](O)O[C@H](CO)[C@@H](O)[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@H](O[C@H]2[C@@H]([C@@H](O[C@H]3[C@@H]([C@@H](O)[C@H](O)[C@H](O3)C(O)=O)O)[C@H](O)[C@@H](CO)O2)NC(C)=O)[C@@H](C(O)=O)O1 YWIVKILSMZOHHF-QJZPQSOGSA-N 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- 229920003043 Cellulose fiber Polymers 0.000 claims description 3
- 229920001661 Chitosan Polymers 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 229920005610 lignin Polymers 0.000 claims description 3
- 229940057995 liquid paraffin Drugs 0.000 claims description 3
- FLPJVCMIKUWSDR-UHFFFAOYSA-N 2-(4-formylphenoxy)acetamide Chemical compound NC(=O)COC1=CC=C(C=O)C=C1 FLPJVCMIKUWSDR-UHFFFAOYSA-N 0.000 claims description 2
- 239000004166 Lanolin Substances 0.000 claims description 2
- 229940070312 arachidyl propionate Drugs 0.000 claims description 2
- 229940074979 cetyl palmitate Drugs 0.000 claims description 2
- PXDJXZJSCPSGGI-UHFFFAOYSA-N hexadecanoic acid hexadecyl ester Natural products CCCCCCCCCCCCCCCCOC(=O)CCCCCCCCCCCCCCC PXDJXZJSCPSGGI-UHFFFAOYSA-N 0.000 claims description 2
- OPEHDFRKFVXKNP-UHFFFAOYSA-N icosyl propanoate Chemical compound CCCCCCCCCCCCCCCCCCCCOC(=O)CC OPEHDFRKFVXKNP-UHFFFAOYSA-N 0.000 claims description 2
- 229940039717 lanolin Drugs 0.000 claims description 2
- 235000019388 lanolin Nutrition 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000002480 mineral oil Substances 0.000 claims description 2
- 235000010446 mineral oil Nutrition 0.000 claims description 2
- 229940042472 mineral oil Drugs 0.000 claims description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 2
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 2
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 2
- FRHNXUKHAUWMOQ-UHFFFAOYSA-M sodium;16-methylheptadecanoate Chemical compound [Na+].CC(C)CCCCCCCCCCCCCCC([O-])=O FRHNXUKHAUWMOQ-UHFFFAOYSA-M 0.000 claims description 2
- 239000004264 Petrolatum Substances 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 229940066842 petrolatum Drugs 0.000 claims 1
- 235000019271 petrolatum Nutrition 0.000 claims 1
- 239000004615 ingredient Substances 0.000 abstract description 2
- 239000007767 bonding agent Substances 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 18
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 238000001354 calcination Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 229910001570 bauxite Inorganic materials 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- MKPXGEVFQSIKGE-UHFFFAOYSA-N [Mg].[Si] Chemical compound [Mg].[Si] MKPXGEVFQSIKGE-UHFFFAOYSA-N 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229940099259 vaseline Drugs 0.000 description 2
- 102000006335 Phosphate-Binding Proteins Human genes 0.000 description 1
- 108010058514 Phosphate-Binding Proteins Proteins 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- OJMOMXZKOWKUTA-UHFFFAOYSA-N aluminum;borate Chemical compound [Al+3].[O-]B([O-])[O-] OJMOMXZKOWKUTA-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229920006184 cellulose methylcellulose Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/636—Polysaccharides or derivatives thereof
- C04B35/6365—Cellulose or derivatives thereof
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to an environment-friendly fireproof plastic for a CFB furnace and a preparation process thereof, wherein the raw materials comprise the following ingredients in parts by weight: 60-80 parts of main body refractory raw materials; 2-20 parts of expansion refractory raw material fine powder; 2-8 parts of plastic raw material fine powder; 4-10 parts of functional auxiliary agent; 0.1 to 0.5 part of cellulose; 0.1 to 0.5 part of humectant; 10-15 parts of water. The functional auxiliary agent is a premix of silicon micropowder and complex aluminum magnesium sol powder, or a mixture of silicon micropowder and complex aluminum magnesium sol powder. The fireproof plastic overcomes the technical problems of hardening and poor high-temperature performance caused by the traditional bonding agent, and has good practical value.
Description
Technical Field
The invention belongs to the field of inorganic nonmetallic material subject refractory materials, and relates to CFB environment-friendly refractory plastic and a preparation process thereof.
Background
The CFB boiler combustion technology is a clean combustion technology accepted at home and abroad, and has the unique advantages of less pollutant emission, high combustion efficiency, large load regulation ratio, comprehensive utilization of ash and the like. The majority of the plastic materials of the CFB are plastic materials of an alumina system, the wear-resistant and fire-resistant plastic materials for the circulating fluidized bed boiler of China patent CN107556008A, the high-alumina and fire-resistant plastic materials of the CFB boiler with high strength of CN109422529A, the high-strength and wear-resistant plastic materials of the CFB boiler with in-situ aluminum borate whisker reinforced with the high-strength and fire-resistant plastic materials of the CFB boiler with high strength and fire-resistant materials of CN107954733A are disclosed as main components of bauxite or corundum with different alumina contents, and the binding agent is phosphoric acid or phosphate. The storage time is short because phosphoric acid or phosphate reacts with iron impurities in bauxite. The lower the bauxite grade in the plastics, the higher the impurity content and the shorter the shelf life. In addition, the cost is increased due to the need of on-site secondary stirring, and the stirring of the plastic can be influenced due to the difference of the proficiency of constructors, so that quality fluctuation is caused. Third, the process requires the introduction of large amounts of phosphate binders, which are relatively polluting, and phosphate binding plastics are now banned in many areas. Meanwhile, the patent adopts A, B material, namely, the mixture of alumina aggregate and powder is added with a proper amount of phosphoric acid binding agent, stirred, trapped and deironized, and then the mixture is filledThe wet material A is prepared by bagging, and the dry powder B is prepared by bagging and packaging the dry powder of the external additive such as the early strength agent, the plasticizer and the like. And delivering the A, B material to a construction site, pouring the A, B material into a stirrer for secondary stirring, and adding the phosphoric acid binding agent for uniform mixing to prepare the unshaped refractory material for ramming construction. Because the manufacturing procedures are more, the storage time of the wet material is influenced by too much proportion of the phosphoric acid binding agent added in the material trapped in one procedure for removing iron, and the iron removing effect is influenced by too little proportion of the phosphoric acid binding agent added, so that the quality of the plastic is difficult to have stable standard. Chinese CN107556005a discloses a high-strength wear-resistant plastics of chromite mullite silicon nitride for cyclone separator of CFB boiler, which has high strength, good wear-resistant property and low thermal conductivity, but nano alumina sol binder, beta Si 3 N 4 Raw materials such as beta Sialon and the like are high in price, and the product price is high, so that the customer acceptance is reduced.
Disclosure of Invention
In order to overcome the technical defects, the environment-friendly fireproof plastic for the CFB furnace and the preparation process thereof are characterized in that the raw materials comprise the following ingredients in parts by weight:
60-80 parts of main body refractory raw materials;
2-20 parts of expansion refractory raw material fine powder;
2-8 parts of plastic raw material fine powder;
4-10 parts of functional auxiliary agent;
0.1 to 0.5 part of cellulose;
0.1 to 0.5 part of humectant;
10-15 parts of water;
the main refractory raw materials comprise alumina coarse aggregate, alumina fine aggregate, high-alumina electroceramic aggregate and alumina fine powder, wherein the granularity of the alumina coarse aggregate is 5-2 mm, the granularity of the alumina fine aggregate is 1-0.25 mm, the high-alumina electroceramic aggregate is waste electroceramic reclaimed material with granularity of 1-0.25 mm, the granularity of the alumina fine powder is 0.088-0.044 mm, and the mass ratio range of the alumina fine powder is (3-5): (1-2): (1-2): (3-5), the preferred mass ratio range is 3: (1-2): (1-2): (3-5), more preferably in the mass ratio range of 3: (1-2): (1-2): 3, a further preferred range is 3:1:1:3.
the expansion refractory raw material fine powder is one or two of kyanite powder and andalusite powder, and the granularity is 0.044-0.010 mm;
the plastic raw material is one or two mixtures of clay and bentonite;
the functional auxiliary agent is a premix of silicon micropowder and complex aluminum magnesium sol powder, or a mixture of silicon micropowder, complex aluminum magnesium sol powder and complex aluminum magnesium sol powder, and the functional auxiliary agent is Al 2 O 3 ：MgO：SiO 2 The molar ratio of (2) satisfies 1:1: (2.4-2.6).
SiO in the silicon micropowder 2 Can be 94% or 96%, particle size D 90 ≤1μm，D 50 0.1-0.3 mu m;
the cellulose is one or more of organic cellulose, methyl Cellulose (MC), hydroxypropyl methyl cellulose (HPMC), hydroxyethyl cellulose (HEC), carboxymethyl cellulose (CMC), lignin fiber and cellulose fiber;
the humectant is prepared from the following components in percentage by mass: 1 and a moisture absorbent, wherein the sealing agent is one or more of Vaseline, liquid paraffin, lanolin, mineral oil, arachidyl propionate, cetyl palmitate and alkyl polymethylsiloxane, and the moisture absorbent is one or more of sodium hyaluronate crosslinked polymer, sodium isostearate, polyvinylpyrrolidone and chitosan.
The raw materials are strongly mixed and milled for 10 to 25 minutes until uniform, pressed into mud balls, sealed and packaged, and stored for standby.
The invention relates to an environment-friendly fireproof plastic for a CFB furnace and construction and maintenance of a preparation process thereof:
transporting the sealed packaged plastic to the site, and directly tamping the package; and naturally drying for 48-96 h after construction, baking for 48h at 120 ℃, and then slowly heating to the working temperature at a heating rate of less than or equal to 20 ℃/h to obtain the finished product.
The main component of the invention is alumina, the strength is high, the requirement of CFB on high wear-resistant working condition is met, and the price customer acceptance is high. The main component of the functional auxiliary agent isMgO、Al 2 O 3 、SiO 2 No other impurity components are introduced. The silica powder, the complex aluminum-magnesium sol powder or the complex silicon-magnesium sol powder is hydrated and then cemented at normal temperature, and a penetrating structure is formed after drying and embedded between particles and fine powder, so that the bonding strength of a plastic blank is improved, the cementing agent powder has the function of promoting sintering at high temperature, the sintering temperature is reduced, the sensitivity of the plastic to temperature is reduced, and the strength of the plastic provided by the invention at normal temperature, medium temperature and high temperature is relatively stable and can reach more than 80 MPa.
The conventional binding agent aluminum dihydrogen phosphate is not used in the invention, and because acid binding agents such as aluminum dihydrogen phosphate react with impurities such as Fe in alumina raw materials, the whole plastic can be hardened under severe conditions, so that the prepared plastic can not be used after being transported to a construction site. The premix adopted by the functional auxiliary agent has cementing performance under low temperature condition, ensures that hardening is not caused by reaction during configuration, forms eutectic phase in the range of 1200-1400 ℃ in the high-temperature baking process, promotes rapid densification of refractory materials, and further obtains excellent high-temperature slag resistance and anti-scouring performance.
The plastic product of the invention is characterized in that the raw materials are prepared into plastic wet mud balls in the factory configuration, and the quality is stable. The plastic disclosed by the invention is combined without phosphoric acid or phosphate, is environment-friendly, overcomes the contradiction between the impurity contents of phosphoric acid and bauxite, and overcomes the phosphoric acid addition standard required by stable plastic quality outside the quality guarantee period which is difficult to determine. The added humectant can prevent the damage of the sealed package caused by scratch injury during transportation, so that the plastic wet material is dried and deteriorated, and the retention period can be prolonged by 2-3 times to 12-18 months. The invention has the advantages of relatively low raw materials, high cost performance and high customer acceptance.
Detailed Description
Example 1
The environment-friendly fireproof plastic formula for the CFB furnace comprises the following raw materials in parts by weight:
60 parts of main body refractory raw materials, 20 parts of expansion refractory raw material fine powder, 8 parts of plastic raw material fine powder and 6 parts of functional auxiliary agents0.5 part of cellulose, 0.1 part of humectant and 15 parts of water; the main body refractory raw materials comprise alumina aggregate, high-alumina electroceramics aggregate and alumina fine powder, wherein the granularity of the alumina aggregate is 5-2 mm and 1-0.25 mm, the high-alumina electroceramics aggregate is waste electroceramics reclaimed material with granularity of 1-0.25 mm, the granularity of the alumina fine powder is 0.088-0.044 mm, and the mass ratio of the alumina fine powder to the alumina fine powder is 3:1:1:3, a step of; the expansion refractory raw material fine powder is one or two of kyanite powder and andalusite powder, and the granularity is 0.044-0.010 mm; the plastic raw material is clay; the functional auxiliary agent is a premix of silicon micropowder and complex aluminum magnesium sol powder, and Al2O3 in the functional auxiliary agent is as follows: mgO: the molar ratio of SiO2 satisfies 1:1:2.5; siO in the silicon micropowder 2 Can be 96% in content and D in particle size 90 ＝1μm，D 50 =0.3 μm; the cellulose is organic cellulose Methyl Cellulose (MC); the humectant is prepared from the following components in percentage by mass: 1 and a moisture absorbent, wherein the sealing agent is Vaseline, and the moisture absorbent is sodium hyaluronate crosslinked polymer. The raw materials are mixed and ground for 25min to be uniform, pressed into mud balls, sealed and packaged, and stored for standby. And (3) when the construction is carried out, the construction is carried out on site, the package is opened, the construction is directly rammed, the construction is finished, the construction is naturally dried for 48 hours, the construction is baked for 48 hours at 120 ℃, and then the temperature is slowly increased to the working temperature for service at the heating rate of 20 ℃/h. The strength of the embodiment 1 at normal temperature, medium temperature and high temperature is relatively stable and can reach more than 80 MPa. Table 1 shows the properties of example 1 after calcination at 1400℃for 3 h.
Example 2
The environment-friendly fireproof plastic formula for the CFB furnace comprises the following raw materials in parts by weight:
80 parts of main refractory raw materials, 2 parts of expansion refractory raw material fine powder, 2 parts of plastic raw material fine powder, 6 parts of functional auxiliary agents, 0.1 part of cellulose, 0.5 part of humectant and 10 parts of water;
the main body refractory raw materials comprise alumina aggregate, high-alumina electroceramics aggregate and alumina fine powder, wherein the granularity of the alumina aggregate is 5-2 mm and 1-0.25 mm, the high-alumina electroceramics aggregate is waste electroceramics reclaimed material with granularity of 1-0.25 mm, the granularity of the alumina fine powder is 0.088-0.044 mm, and the mass ratio of the alumina fine powder to the alumina fine powder is 3:1:1:3, a step of; the fine powder of the expansion refractory raw material is blue crystalOne or two of stone powder and andalusite powder, the granularity is 0.044-0.010 mm; the plastic raw material is bentonite; the functional auxiliary agent is a mixture of silicon micro powder and complex silicon magnesium sol powder, and Al is contained in the functional auxiliary agent 2 O 3 ：MgO：SiO 2 The molar ratio of (2) satisfies 1:1:2.6; siO in the silicon micropowder 2 Can be 94% or 96%, particle size D 90 ≤1μm，D 50 0.1-0.3 mu m; the cellulose is organic cellulose, methyl Cellulose (MC), hydroxypropyl methyl cellulose (HPMC), hydroxyethyl cellulose (HEC), carboxymethyl cellulose (CMC), lignin fiber and cellulose fiber mixture; the humectant is prepared from the following components in percentage by mass: 1 and a moisture absorbent, wherein the sealing agent is a mixture of alkyl polymethylsiloxane, and the moisture absorbent is a sodium hyaluronate crosslinked polymer. The raw materials are mixed and ground for 10min to be uniform, pressed into mud balls, sealed and packaged, and stored for standby. And (3) when the construction is carried out, the construction is carried out on site, the package is opened, the construction is directly rammed, the construction is finished, the construction is naturally dried for 96 hours, the construction is baked for 48 hours at 120 ℃, and then the temperature is slowly increased to the working temperature for service at the heating rate of 15 ℃/h. The strength of the embodiment 2 at normal temperature, medium temperature and high temperature is relatively stable and can reach more than 80 MPa. Table 1 shows the properties of example 2 after calcination at 1400℃for 3 h.
Example 3
The environment-friendly fireproof plastic formula for the CFB furnace comprises the following raw materials in parts by weight:
70 parts of main refractory raw materials, 12 parts of expansion refractory raw material fine powder, 5 parts of plastic raw material fine powder, 10 parts of functional auxiliary agents, 0.3 part of cellulose, 0.3 part of humectant and 13 parts of water;
the main body refractory raw materials comprise alumina aggregate, high-alumina electroceramics aggregate and alumina fine powder, wherein the granularity of the alumina aggregate is 5-2 mm and 1-0.25 mm, the high-alumina electroceramics aggregate is waste electroceramics reclaimed material with granularity of 1-0.25 mm, the granularity of the alumina fine powder is 0.088-0.044 mm, and the mass ratio of the alumina fine powder to the alumina fine powder is 3:1:1:3, a step of; the expansion refractory raw material fine powder is one or two of kyanite powder and andalusite powder, and the granularity is 0.044-0.010 mm; the plastic raw material is a mixture of clay and bentonite; the functional auxiliary agentIs a mixture of silicon micropowder and complex aluminum magnesium sol powder, and the functional auxiliary agent is Al 2 O 3 ：MgO：SiO 2 The molar ratio of (2) satisfies 1:1:2.4; siO in the silicon micropowder 2 Can be 94% or 96%, particle size D 90 ≤1μm，D 50 0.1-0.3 mu m; the cellulose is organic cellulose wood fiber; the humectant is prepared from the following components in percentage by mass: 1 and a moisture absorbent, wherein the sealing agent is liquid paraffin, and the moisture absorbent is chitosan. The raw materials are mixed and ground for 20min to be uniform, pressed into mud balls, sealed and packaged, and stored for standby. And (3) when the construction is carried out, the construction is carried out on site, the package is opened, the construction is directly rammed, the construction is finished, the construction is naturally dried for 72 hours, the construction is baked for 48 hours at 120 ℃, and then the temperature is slowly increased to the working temperature for service at the heating rate of 20 ℃/h. Example 3 is relatively stable in normal temperature, medium temperature and high temperature strength, and can reach more than 80 MPa. Table 1 shows the properties of example 3 after calcination at 1400℃for 3 h.
Comparative example 1:
the ratio of the silica powder to the complex aluminum-magnesium sol powder in the functional auxiliary agent in example 1 was adjusted to make Al in the functional auxiliary agent 2 O 3 ：MgO：SiO 2 The molar ratio of (2) satisfies 1:1:2; the rest proportion and the preparation process flow are unchanged, the compressive strength after 1400 ℃ x 3h calcination is 69MPa, other performances are shown in the following table, and the high-temperature comprehensive performance is deteriorated when the range of the auxiliary agent is deviated.
Comparative example 2:
the ratio of the silica powder to the complex aluminum-magnesium sol powder in the functional auxiliary agent in example 1 was adjusted to make Al in the functional auxiliary agent 2 O 3 ：MgO：SiO 2 The molar ratio of (2) satisfies 1:1:3, a step of; the rest proportion and the preparation process flow are unchanged, the compressive strength after 1400 ℃ x 3h calcination is 71MPa, other performances are shown in the following table, and the high-temperature comprehensive performance is deteriorated when the range of the auxiliary agent is deviated.
Comparative example 3:
the functional auxiliary agent in the example 1 is replaced by aluminum dihydrogen phosphate; the other proportion is unchanged, the materials are transported to the site during construction, the package is opened, the materials cannot be directly rammed due to hardening, mechanical crushing treatment is needed, the materials are naturally dried for 72 hours after construction, baked for 48 hours at 120 ℃, and then slowly heated to the working temperature at the heating rate of 20 ℃/hour for service. The performance after 1400 ℃ x 3h calcination is shown in the following table, and the deterioration of the high-temperature comprehensive performance can be seen.
Table 1 Table 1400 ℃ x 3h Performance List of examples 1-3 after firing
Claims (10)
1. The environment-friendly fireproof plastic for the CFB furnace is characterized by comprising the following raw materials in parts by weight:
60-80 parts of main body refractory raw materials;
2-20 parts of expansion refractory raw material fine powder;
2-8 parts of plastic raw material fine powder;
4-10 parts of functional auxiliary agent;
0.1 to 0.5 part of cellulose;
0.1 to 0.5 part of humectant;
10-15 parts of water;
the main refractory raw material consists of alumina coarse aggregate, alumina fine aggregate, high-alumina electroceramics aggregate and alumina fine powder, wherein the mass ratio range of the alumina coarse aggregate to the alumina fine aggregate is (3-5): (1-2): (1-2): (3-5);
the expansion refractory raw material fine powder is one or two of kyanite powder and andalusite powder, and the granularity is 0.044-0.010 mm;
the plastic raw material is one or two mixtures of clay and bentonite;
the functional auxiliary agent is a premix of silicon micropowder and complex aluminum magnesium sol powder, or a mixture of silicon micropowder and complex aluminum magnesium sol powder.
2. The refractory castable of claim 1, wherein said functional auxiliary comprises Al 2 O 3 ：MgO：SiO 2 The molar ratio of (2) satisfies 1:1: (2.4-2.6).
3. The refractory plastic of claim 2, wherein the fine silica powder comprises SiO 2 Can be 94% or 96%, particle size D 90 ≤1μm，D 50 0.1 to 0.3 mu m.
4. The refractory plastic according to claim 1, wherein the alumina coarse aggregate has a granularity of 5-2 mm, the alumina fine aggregate has a granularity of 1-0.25 mm, the high-aluminum electroceramic aggregate is a waste electroceramic reclaimed material with a granularity of 1-0.25 mm, and the alumina fine powder has a granularity of 0.088-0.044 mm.
5. The fire resistant plastic according to claim 1, wherein the cellulose is one or more of organic cellulose, methyl Cellulose (MC), hydroxypropyl methylcellulose (HPMC), hydroxyethyl cellulose (HEC), carboxymethyl cellulose (CMC), lignin fibers, cellulose fibers.
6. The refractory castable according to claim 1, wherein the humectant is in a mass ratio of 1:1 and a moisture absorbent mixture.
7. The fire resistant plastic according to claim 1, wherein the sealer is one or more of petrolatum, liquid paraffin, lanolin, mineral oil, arachidyl propionate, cetyl palmitate, alkyl polymethylsiloxane.
8. The fire resistant plastic according to claim 1, wherein the moisture absorbent is one or more of a sodium hyaluronate cross-linked polymer, sodium isostearate, polyvinylpyrrolidone, chitosan.
9. The preparation method of the environment-friendly fireproof plastic for the CFB furnace, which is characterized in that the raw materials are forcefully mixed and milled for 10-25 min until being uniform, are extruded into mud balls, sealed and packaged, and are stored for later use.
10. A method of construction and maintenance of an environmentally friendly fire resistant plastic for CFB furnaces as claimed in any one of claims 1 to 8, wherein the hermetically packaged plastic is transported to the site and the package is opened for direct ramming; and naturally drying for 48-96 h after construction, baking for 48h at 120 ℃, and then slowly heating to the working temperature at a heating rate of less than or equal to 20 ℃/h to obtain the finished product.
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