CN115321971A - Method for preparing cordierite ceramic by using fly ash - Google Patents
Method for preparing cordierite ceramic by using fly ash Download PDFInfo
- Publication number
- CN115321971A CN115321971A CN202211124352.9A CN202211124352A CN115321971A CN 115321971 A CN115321971 A CN 115321971A CN 202211124352 A CN202211124352 A CN 202211124352A CN 115321971 A CN115321971 A CN 115321971A
- Authority
- CN
- China
- Prior art keywords
- fly ash
- cordierite ceramic
- raw material
- containing raw
- ceramic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052878 cordierite Inorganic materials 0.000 title claims abstract description 45
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000000919 ceramic Substances 0.000 title claims abstract description 42
- 239000010881 fly ash Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 238000005245 sintering Methods 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 235000015895 biscuits Nutrition 0.000 claims abstract description 10
- 239000002243 precursor Substances 0.000 claims abstract description 10
- 238000009694 cold isostatic pressing Methods 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011777 magnesium Substances 0.000 claims abstract description 8
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 8
- 239000010703 silicon Substances 0.000 claims abstract description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 239000013078 crystal Substances 0.000 claims abstract description 5
- 230000008859 change Effects 0.000 claims abstract description 4
- 239000011812 mixed powder Substances 0.000 claims abstract description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 239000000395 magnesium oxide Substances 0.000 claims description 7
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052700 potassium Inorganic materials 0.000 claims description 6
- 239000011591 potassium Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 239000000454 talc Substances 0.000 claims description 4
- 229910052623 talc Inorganic materials 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 claims description 2
- 239000006004 Quartz sand Substances 0.000 claims description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- 238000000498 ball milling Methods 0.000 claims description 2
- 229910001570 bauxite Inorganic materials 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 235000009566 rice Nutrition 0.000 claims description 2
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- 239000012071 phase Substances 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 238000002360 preparation method Methods 0.000 abstract description 4
- 239000007791 liquid phase Substances 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 18
- 239000000463 material Substances 0.000 description 13
- 239000000654 additive Substances 0.000 description 8
- BJZIJOLEWHWTJO-UHFFFAOYSA-H dipotassium;hexafluorozirconium(2-) Chemical compound [F-].[F-].[F-].[F-].[F-].[F-].[K+].[K+].[Zr+4] BJZIJOLEWHWTJO-UHFFFAOYSA-H 0.000 description 7
- 230000000996 additive effect Effects 0.000 description 5
- 229910052849 andalusite Inorganic materials 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000010348 incorporation Methods 0.000 description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 235000012222 talc Nutrition 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical group 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 2
- 238000010304 firing Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 238000009475 tablet pressing Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- 229910017625 MgSiO Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 229910006501 ZrSiO Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000416 bismuth oxide Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004100 electronic packaging Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- -1 magnesium aluminate Chemical class 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 229910052642 spodumene Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B35/16—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 silicates other than clay
- C04B35/18—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 silicates other than clay rich in aluminium oxide
- C04B35/195—Alkaline earth aluminosilicates, e.g. cordierite or anorthite
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
- C04B33/1352—Fuel ashes, e.g. fly ash
-
- 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
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
-
- 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-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
- 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
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/444—Halide containing anions, e.g. bromide, iodate, chlorite
- C04B2235/445—Fluoride containing anions, e.g. fluosilicate
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
-
- 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
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- 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
-
- 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
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention relates to a method for preparing cordierite ceramic by using fly ash, which is characterized in that a magnesium-containing raw material, a silicon-containing raw material and an aluminum-containing raw material are supplemented into the pretreated fly ash and are uniformly mixed to form precursor powder; mixing a compound which can simultaneously generate synergistic effects of phase change toughening, lattice distortion promotion of crystal form conversion, promotion of liquid phase sintering and the like into the precursor powder, and carrying out dry pressing and then cold isostatic pressing on the obtained mixed powder to obtain a ceramic biscuit with high strength, controllable shape and uniform microstructure; drying the biscuit, and sintering at 1100-1450 ℃ to obtain the cordierite ceramic. The invention has the beneficial effects that: the cordierite ceramic prepared by the invention has excellent thermal and mechanical properties, the compressive strength of the cordierite ceramic is up to 511MPa, and the thermal expansion coefficient is as low as 2.48 multiplied by 10 ‑6 The preparation cost is lower, and the method is suitable for honeycomb ceramic extrusion molding process.
Description
Technical Field
The invention relates to the field of solid waste recycling and ceramic heat storage material preparation, in particular to a method for preparing cordierite ceramic by using fly ash.
Background
As industry develops, electricity demand increases year by year, and coal fired power plants have accumulated billions of tons of fly ash waste over the years. The traditional treatment mode of the fly ash is low value-added fields such as land landfill, building material manufacturing, agricultural fertilizer manufacturing and the like. The cordierite ceramic consists of elements of Si, al, mg and O, and can be used as high-quality heat storage ceramic, refractory material, high-temperature structural ceramic, electronic packaging material, low-temperature heat radiation material and the like. Because the fly ash contains more components such as silicon, aluminum and the like, the conversion of the fly ash to cordierite can be realized theoretically through component blending, and the utilization rate and the additional value of the fly ash are improved, so that the preparation of cordierite, especially thermal storage honeycomb ceramic by using the fly ash has become a research hotspot in the field in recent years.
The firing temperature of pure cordierite is narrow, which is not beneficial to the artificial synthesis of high-performance cordierite materials, and in the prior art, sintering aids such as andalusite, spodumene, zirconia, bismuth oxide and the like are mainly introduced into the formula, so that the firing temperature of the materials is reduced, the phase conversion efficiency of the cordierite is improved, and low thermal expansion coefficient and good mechanical properties are obtained. However, the introduction amount of the additive is generally higher, which is not beneficial to the component blending of cordierite and also improves the material cost; in addition, the thermal and mechanical properties of the material are generally difficult to be improved comprehensively by adding the additive, and the improvement range is not high. The application of cordierite honeycomb ceramics is seriously affected by the existence of the above problems.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a method for preparing cordierite ceramic by using fly ash, which comprises the following steps:
s1, pretreating the fly ash, and uniformly mixing the fly ash with a magnesium-containing raw material, a silicon-containing raw material and an aluminum-containing raw material to form precursor powder;
s2, mixing an accelerant for phase change toughening, crystal form conversion and sintering into the precursor powder, wherein the accelerant comprises one or a mixture of potassium fluozirconate, lithium fluoaluminate, chromium fluoaluminate and potassium fluotantalate;
s3, obtaining a ceramic biscuit by the mixed powder obtained in the S2 through a forming method;
and S4, drying the ceramic biscuit and sintering at a certain temperature to obtain the cordierite ceramic.
Preferably, in S1, the pretreating the fly ash includes: 1-30wt% hydrochloric acid or nitric acid solution is adopted to react with the fly ash for 10-180min, and then ball milling and drying are carried out for 20-200 min.
Preferably, in S1, the magnesium-containing raw material is talc, magnesium oxide, magnesia, magnesium hydroxide, basic magnesium carbonate or recycled magnesia refractory; the silicon-containing raw materials are silicon oxide, wollastonite, rice hulls and quartz sand; the aluminum-containing raw material is aluminum oxide, aluminum hydroxide, bauxite and recycled aluminum refractory material.
Preferably, in S1, the precursor powder is prepared according to the cordierite theory, wherein the mass fraction of the fly ash is 10-80%, the mass fraction of the magnesium-containing raw material is 5-60%, the mass fraction of the aluminum-containing raw material is 0-50%, and the mass fraction of the silicon-containing raw material is 0-50%.
Preferably, the addition amount of the accelerator is 0.1-8.0% of the mass of the precursor powder.
Preferably, in S3, the molding method is dry pressing followed by cold isostatic pressing.
Preferably, in S3, the pressure for dry pressing is 10-30MPa, and the pressure for cold isostatic pressing is 100-300MPa.
Preferably, in S4, the sintering temperature is 1100-1450 ℃, the heating rate is 1-4 ℃/min, and the holding time is 1-6h.
The invention has the beneficial effects that:
(1) The material has good thermal and mechanical properties. The cordierite ceramic prepared by the invention adopts fly ash as a main raw material, the main crystal phase in the powder is a mullite phase, and the impurities are less after pretreatment, thereby being beneficial to generating a cordierite phase with higher purity in the high-temperature calcination process. In addition, potassium fluorozirconate, lithium fluoroaluminate, chromium fluoroaluminate and potassium fluorotantalate are used as additives, and the products after the additives are decomposed can promote the conversion to a beneficial crystalline phase; on the other hand, the hydrogen fluoride gas generated by decomposition can react with certain elements in the formula to generate a high-temperature liquid phase so as to promote mass transfer and sintering. The combined action of the mechanisms can obviously improve the density of the material, improve the compressive strength and reduce the thermal expansion coefficient.
(2) The raw materials and the process have low cost. The cordierite ceramic prepared by the invention has wide sintering temperature range, simple process, lower additive introduction amount and raw material cost saving.
Drawings
FIG. 1 is a flow chart of a method for producing cordierite ceramic from fly ash;
FIG. 2 is an X-ray diffraction spectrum of the samples of examples 1 to 3 and comparative examples 1 and 2;
FIG. 3 is a scanning electron micrograph of examples 1 to 3 and comparative examples 1 and 2.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to provide an understanding of the invention. It should be noted that, for a person skilled in the art, several modifications can be made to the invention without departing from the principle of the invention, and these modifications and modifications also fall within the protection scope of the claims of the present invention.
Example 1
A method for preparing cordierite ceramic by using fly ash comprises the following steps:
1) Pretreatment of raw materials: and (3) removing impurities from the fly ash by adopting a 20wt% hydrochloric acid solution, washing and drying, and grinding the obtained fly ash in a ball mill for 1h.
2) Material preparation and mixing: weighing and mixing 50wt% of fly ash, 33wt% of talcum, 15wt% of alumina and 2wt% of magnesium oxide, adding 0.5wt% of potassium fluozirconate into the obtained mixture, and operating for 20min by using a mixer to obtain a uniform mixture.
3) Blank forming: and pressing the powder mixture into blocks by a powder tablet press, and further improving the density of the biscuit by utilizing a cold isostatic pressing process, wherein the tablet pressing pressure is 20MPa, and the pressure used by the cold isostatic pressing is 200MPa.
4) And (3) high-temperature sintering: and (3) placing the biscuit subjected to dry pressing forming in a muffle furnace, heating to 1300 ℃ at the speed of 2 ℃/min, preserving heat for 2h, and sintering to obtain the cordierite ceramic material.
The test shows that the volume density of the cordierite ceramic is 2.03g/cm 3 Compressive strength of 511MPa, and average thermal expansion coefficient of 2.48X 10 at RT-800 deg.C -6 /° c, the comprehensive properties are good.
Example 2
The process of example 1 was repeated with the potassium fluorozirconate incorporation increased to 1 wt.%.
Example 3
The potassium fluorozirconate incorporation was increased to 1.5wt% and the process of example 1 was repeated.
Comparative example 1 case where no additive was added
The potassium fluorozirconate incorporation was reduced to 0wt% and the process of example 1 was repeated.
The volume density of the cordierite ceramic is 2.01g/cm 3 A compressive strength of 342MPa and a thermal expansion coefficient of 3.12X 10 -6 V. C. Comparing examples 1-3 with comparative example 1, the bulk densities of examples 1-3 are all increased over comparative example 1. Comparing the example 1 with the comparative example 1, the compressive strength of the example 1 is improved by 49.42 percent compared with the comparative example 1, the average thermal expansion coefficient at RT-800 ℃ is reduced by 20.51 percent, and the comprehensive performance of the material is obviously improved by adding the potassium fluorozirconate.
Comparative example 2 case where 20wt% andalusite additive was added
1) Pretreatment of raw materials: removing impurities from the fly ash through a hydrochloric acid solution, washing and drying to obtain fly ash, and grinding the fly ash in a ball mill for 1h.
2) Preparing materials and mixing: weighing and mixing 50wt% of the fly ash, 19wt% of talc, 7wt% of alumina, 4wt% of magnesium oxide and 20wt% of andalusite, and operating for 20min by using a mixer to obtain a uniform mixed material.
3) Blank forming: and pressing the powder mixture into blocks by a powder tablet press, and further improving the density of the biscuit by utilizing a cold isostatic pressing process, wherein the tablet pressing pressure is 20MPa, and the pressure used by the cold isostatic pressing is 200MPa.
4) And (3) high-temperature sintering: and (3) placing the biscuit subjected to dry pressing forming in a muffle furnace, heating to 1300 ℃ at the speed of 2 ℃/min, preserving heat for 2h, and sintering to obtain the cordierite ceramic material.
The volume density of the cordierite ceramic is 1.95g/cm 3 The average thermal expansion coefficient at RT-800 ℃ is 2.77 multiplied by 10 -6 V. C. The bulk density of the comparative example 2 is reduced compared with that of the examples 1-3, the average thermal expansion coefficient of the comparative example 2 at RT-800 ℃ is increased by 10.47 percent compared with that of the example 1, and the andalusite addition amount is high but the improvement on the thermal property is not obvious.
The cordierite ceramics obtained in examples 1 to 3 and comparative examples 1 and 2 were subjected to phase analysis, and the results are shown in FIG. 2. Comparative examples 1, 2 magnesium aluminate spinel phase (MgAl) in comparative examples 1-3 2 O 4 ) More aluminum oxide (Al) and less aluminum oxide 2 O 3 ) And mullite phase (Al) 6 Si 2 O 13 ) The comparative example phase is shown to be less efficient at converting to cordierite at this temperature; the presence of zircon (ZrSiO) in examples 1 to 3 4 ) And magnesium silicate (MgSiO) 3 ) Is favorable for improving the density and the mechanical property of the material.
The cordierite ceramics obtained in examples 1 to 3 and comparative examples 1 and 2 were observed by scanning electron microscope, and the results are shown in FIG. 3, in which FIGS. 3a to 3c correspond to the scanning results of examples 1 to 3, respectively, and FIGS. 3d and 3e correspond to the scanning results of comparative examples 1 and 2, respectively. The micro-morphology of the examples 1-3 is gradually densified along with the increase of the introduction amount of the potassium fluorozirconate, and the structure density is improved compared with that of the comparative examples 1 and 2, which is consistent with the measured volume density data rule; comparative examples 1 and 2, which have a reduced degree of crystalline phase growth direction order compared to examples 1-3, demonstrate that the introduction of potassium fluorozirconate promotes material densification and is beneficial to the directional growth of cordierite.
In summary, the invention provides a method for preparing cordierite ceramic by using fly ash, which is characterized in that one or more additives are introduced to promote the processes of phase change toughening, crystal transformation and sintering of cordierite ceramic. The prepared cordierite ceramic has high volume density, low thermal expansion coefficient, good mechanical property, wide sintering temperature range and low cost of raw materials and process.
Claims (8)
1. A method for preparing cordierite ceramic by using fly ash is characterized by comprising the following steps:
s1, pretreating fly ash, and uniformly mixing the fly ash with a magnesium-containing raw material, a silicon-containing raw material and an aluminum-containing raw material to form precursor powder;
s2, mixing an accelerant for phase change toughening, crystal form conversion and sintering into the precursor powder, wherein the accelerant comprises one or a mixture of potassium fluozirconate, lithium fluoaluminate, chromium fluoaluminate and potassium fluotantalate;
s3, obtaining a ceramic biscuit by the mixed powder obtained in the S2 through a forming method;
and S4, drying the ceramic biscuit and sintering at a certain temperature to obtain the cordierite ceramic.
2. The method for preparing cordierite ceramic from fly ash according to claim 1, wherein the pre-treating of fly ash in S1 comprises: hydrochloric acid or nitric acid solution with the concentration of 1-30wt% is adopted to react with the fly ash for 10-180min, and then ball milling and drying are carried out for 20-200 min.
3. The method for preparing cordierite ceramic by using fly ash according to claim 2, wherein in S1, the raw material containing magnesium is talc, magnesia, magnesium hydroxide, basic magnesium carbonate, recycled magnesia refractory; the silicon-containing raw materials are silicon oxide, wollastonite, rice hulls and quartz sand; the aluminum-containing raw materials are aluminum oxide, aluminum hydroxide, bauxite and recycled aluminum refractory materials.
4. The method for preparing cordierite ceramic from fly ash according to claim 3, wherein in S1, the precursor powder is prepared according to cordierite theory, wherein the mass fraction of the fly ash is 10-80%, the mass fraction of the magnesium-containing raw material is 5-60%, the mass fraction of the aluminum-containing raw material is 0-50%, and the mass fraction of the silicon-containing raw material is 0-50%.
5. The method for preparing cordierite ceramic from fly ash as claimed in claim 4, wherein the amount of the accelerator added in S2 is 0.1-8.0% by mass of the precursor powder.
6. The method for preparing cordierite ceramic from fly ash according to claim 5, wherein in S3, the forming method is dry pressing and then cold isostatic pressing.
7. The method for preparing cordierite ceramic from fly ash as claimed in claim 6, wherein in S3, the pressure for dry pressing is 10 to 30MPa, and the pressure for cold isostatic pressing is 100 to 300MPa.
8. The method for preparing cordierite ceramic from fly ash as claimed in claim 7, wherein in S4, the sintering temperature is 1100-1450 ℃, the heating rate is 1-4 ℃/min, and the holding time is 1-6h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211124352.9A CN115321971A (en) | 2022-09-14 | 2022-09-14 | Method for preparing cordierite ceramic by using fly ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211124352.9A CN115321971A (en) | 2022-09-14 | 2022-09-14 | Method for preparing cordierite ceramic by using fly ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115321971A true CN115321971A (en) | 2022-11-11 |
Family
ID=83929744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211124352.9A Pending CN115321971A (en) | 2022-09-14 | 2022-09-14 | Method for preparing cordierite ceramic by using fly ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115321971A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115784728A (en) * | 2022-11-25 | 2023-03-14 | 北京钢研新冶工程技术中心有限公司 | Cordierite ceramic and preparation method thereof |
| CN116120087A (en) * | 2022-12-16 | 2023-05-16 | 浙江天地环保科技股份有限公司 | Light foamed ceramic synthesized by using fly ash and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02235624A (en) * | 1989-03-08 | 1990-09-18 | Keiichi Yamamoto | Part of rubber foam |
| CN105198394A (en) * | 2015-09-30 | 2015-12-30 | 盐城工学院 | High-infrared-emitting-ability cordierite-spinel ceramic material and preparation method thereof |
| CN107434410A (en) * | 2017-08-28 | 2017-12-05 | 中国兵器工业第五二研究所烟台分所 | A kind of cordierite ceramic raw powder's production technology |
| CN111205074A (en) * | 2020-01-13 | 2020-05-29 | 山东晟世达科技有限公司 | Foamed ceramic containing cordierite framework and preparation method thereof |
-
2022
- 2022-09-14 CN CN202211124352.9A patent/CN115321971A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02235624A (en) * | 1989-03-08 | 1990-09-18 | Keiichi Yamamoto | Part of rubber foam |
| CN105198394A (en) * | 2015-09-30 | 2015-12-30 | 盐城工学院 | High-infrared-emitting-ability cordierite-spinel ceramic material and preparation method thereof |
| CN107434410A (en) * | 2017-08-28 | 2017-12-05 | 中国兵器工业第五二研究所烟台分所 | A kind of cordierite ceramic raw powder's production technology |
| CN111205074A (en) * | 2020-01-13 | 2020-05-29 | 山东晟世达科技有限公司 | Foamed ceramic containing cordierite framework and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李嘉怡 等: ""氟锆酸钾加入量对粉煤灰基堇青石陶瓷性能的影响"", 《耐火材料》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115784728A (en) * | 2022-11-25 | 2023-03-14 | 北京钢研新冶工程技术中心有限公司 | Cordierite ceramic and preparation method thereof |
| CN115784728B (en) * | 2022-11-25 | 2023-12-29 | 北京钢研新冶工程技术中心有限公司 | Cordierite ceramic and preparation method thereof |
| CN116120087A (en) * | 2022-12-16 | 2023-05-16 | 浙江天地环保科技股份有限公司 | Light foamed ceramic synthesized by using fly ash and preparation method thereof |
| CN116120087B (en) * | 2022-12-16 | 2024-04-12 | 浙江浙能科技环保集团股份有限公司 | Light foamed ceramic synthesized by using fly ash and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115321971A (en) | Method for preparing cordierite ceramic by using fly ash | |
| CN103601498B (en) | Preparation method of Ti3AlC2 ceramic powder | |
| CN101708989B (en) | Method for preparing aluminum nitride/boron nitride composite ceramic through combustion synthesis method | |
| CN111620679A (en) | Method for preparing high-purity mullite material by taking fused silica as silicon source | |
| CN111635222B (en) | Low-dielectric microwave dielectric ceramic material based on monoclinic phase and preparation method thereof | |
| CN103771841A (en) | Preparation method of corundum-mullite complex phase ceramic material | |
| CN112939607A (en) | High-thermal-conductivity aluminum nitride ceramic and preparation method thereof | |
| CN107522404A (en) | A kind of dental lithium aluminosilicate glass-ceramics and preparation method thereof | |
| CN107663092B (en) | Preparation method of AlN powder | |
| CN111196727B (en) | High-thermal-conductivity silicon nitride ceramic material and preparation method thereof | |
| CN113185301B (en) | Rapid preparation method of AlON transparent ceramic | |
| CN103951446B (en) | A kind of method utilizing ceramic polished waste residue and coal gangue to prepare β-SiAlON composite diphase material | |
| CN105036167A (en) | Calcium hexaluminate and preparation method thereof | |
| CN104844214A (en) | Densified high-strength zirconium carbide ceramic material, densified high-strength hafnium carbide ceramic material, and low temperature preparation methods of densified high-strength zirconium carbide ceramic material and densified high-strength hafnium carbide ceramic material | |
| CN111807834A (en) | Aluminum titanate ceramic for casting and preparation method thereof | |
| CN108484161B (en) | Aluminum titanate composite material and preparation method thereof | |
| CN115353372A (en) | Sagger for sintering lithium battery positive electrode material and preparation method thereof | |
| Shukur et al. | Preparation of cordierite ceramic from Iraqi raw materials | |
| CN103922752B (en) | Method for preparing beta-SiAlON multiphase material by using fly ash | |
| CN110128163B (en) | Method for preparing cordierite porous ceramic material by using waste catalyst | |
| CN115521156B (en) | Preparation method of ceramic sagger for lithium battery anode material | |
| CN114057504B (en) | Low-thermal-conductivity calcium zirconate material and preparation method thereof | |
| CN114644513B (en) | Preparation method of mullite infrared transparent ceramic | |
| CN114790107B (en) | SiO preparation at low temperature by using polycrystalline silicon cutting waste 2 -Si 3 N 4 Method for compounding ceramic | |
| Cao et al. | A study of synthesis of cordierite powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221111 |