WO2022233039A1 - Method for preparing composite pigment filler for coating by using red mud - Google Patents
Method for preparing composite pigment filler for coating by using red mud Download PDFInfo
- Publication number
- WO2022233039A1 WO2022233039A1 PCT/CN2021/092167 CN2021092167W WO2022233039A1 WO 2022233039 A1 WO2022233039 A1 WO 2022233039A1 CN 2021092167 W CN2021092167 W CN 2021092167W WO 2022233039 A1 WO2022233039 A1 WO 2022233039A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- red mud
- ultrafine
- modification
- treatment
- modifier
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000000945 filler Substances 0.000 title claims abstract description 45
- 239000000049 pigment Substances 0.000 title claims abstract description 44
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 238000000576 coating method Methods 0.000 title claims abstract description 29
- 239000011248 coating agent Substances 0.000 title claims abstract description 15
- 230000004048 modification Effects 0.000 claims abstract description 29
- 238000012986 modification Methods 0.000 claims abstract description 29
- 239000003607 modifier Substances 0.000 claims abstract description 23
- 239000003513 alkali Substances 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000007385 chemical modification Methods 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 239000002270 dispersing agent Substances 0.000 claims abstract description 8
- 230000002378 acidificating effect Effects 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 4
- 238000004381 surface treatment Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 19
- 238000010298 pulverizing process Methods 0.000 claims description 19
- 239000003973 paint Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 8
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 8
- 239000007822 coupling agent Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000010009 beating Methods 0.000 claims description 6
- MOUPNEIJQCETIW-UHFFFAOYSA-N lead chromate Chemical compound [Pb+2].[O-][Cr]([O-])(=O)=O MOUPNEIJQCETIW-UHFFFAOYSA-N 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 239000004115 Sodium Silicate Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 claims description 4
- 239000006148 magnetic separator Substances 0.000 claims description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- 229910052712 strontium Inorganic materials 0.000 claims description 4
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 4
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 claims description 3
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 229920000388 Polyphosphate Polymers 0.000 claims description 2
- 239000004111 Potassium silicate Substances 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 claims description 2
- 229910052788 barium Inorganic materials 0.000 claims description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 2
- RFAFBXGYHBOUMV-UHFFFAOYSA-N calcium chromate Chemical compound [Ca+2].[O-][Cr]([O-])(=O)=O RFAFBXGYHBOUMV-UHFFFAOYSA-N 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- KDJOAYSYCXTQGG-UHFFFAOYSA-N disilicic acid Chemical compound O[Si](O)(O)O[Si](O)(O)O KDJOAYSYCXTQGG-UHFFFAOYSA-N 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- PMYUVOOOQDGQNW-UHFFFAOYSA-N hexasodium;trioxido(trioxidosilyloxy)silane Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[O-][Si]([O-])([O-])O[Si]([O-])([O-])[O-] PMYUVOOOQDGQNW-UHFFFAOYSA-N 0.000 claims description 2
- UCNNJGDEJXIUCC-UHFFFAOYSA-L hydroxy(oxo)iron;iron Chemical compound [Fe].O[Fe]=O.O[Fe]=O UCNNJGDEJXIUCC-UHFFFAOYSA-L 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- -1 phosphomolybdate Chemical compound 0.000 claims description 2
- 229920000768 polyamine Polymers 0.000 claims description 2
- 229920005646 polycarboxylate Polymers 0.000 claims description 2
- 229920000193 polymethacrylate Polymers 0.000 claims description 2
- 229920005862 polyol Polymers 0.000 claims description 2
- 150000003077 polyols Chemical class 0.000 claims description 2
- 239000001205 polyphosphate Substances 0.000 claims description 2
- 235000011176 polyphosphates Nutrition 0.000 claims description 2
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 2
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 2
- 150000002910 rare earth metals Chemical class 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 2
- 150000005846 sugar alcohols Polymers 0.000 claims description 2
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims description 2
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 2
- 235000013799 ultramarine blue Nutrition 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 2
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 claims description 2
- XAEWLETZEZXLHR-UHFFFAOYSA-N zinc;dioxido(dioxo)molybdenum Chemical compound [Zn+2].[O-][Mo]([O-])(=O)=O XAEWLETZEZXLHR-UHFFFAOYSA-N 0.000 claims description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 2
- 238000007885 magnetic separation Methods 0.000 claims 1
- 238000002407 reforming Methods 0.000 claims 1
- 238000004537 pulping Methods 0.000 abstract description 3
- 239000002318 adhesion promoter Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 229910021532 Calcite Inorganic materials 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229920000142 Sodium polycarboxylate Polymers 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 229910001648 diaspore Inorganic materials 0.000 description 1
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000011044 quartzite Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052665 sodalite Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/22—Compounds of iron
- C09C1/24—Oxides of iron
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
-
- 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
- C04B20/02—Treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/40—Compounds of aluminium
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- C—CHEMISTRY; METALLURGY
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
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- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
- C09C3/041—Grinding
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/08—Treatment with low-molecular-weight non-polymer organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/12—Treatment with organosilicon compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
Definitions
- the invention belongs to the field of green resource utilization of industrial solid waste, and in particular relates to a method for preparing composite pigments and fillers for coatings by utilizing red mud.
- Red mud is a by-product produced in the industrial production of alumina. It is dark red in color because it contains iron oxide. Its chemical composition includes Al 2 O 3 , CaO, Fe 2 O 3 , SiO 2 , Na 2 O and TiO 2 .
- the mineral composition includes calcite, hematite, magnetite, sodalite, kaolin, quartzite, diaspore, cannonite, etc. For every 1t of alumina produced, 1-2t of red mud is produced. According to statistics, the annual output of red mud in China is close to 70 million tons, and the total accumulation is as high as 500 million tons. Because red mud has the characteristics of strong alkalinity and high salinity, its comprehensive utilization rate is less than 5%. of destruction.
- red mud At present, the main application fields of red mud are building materials and agricultural fields with low added value, such as brick making, roadbed materials, thermal insulation materials, soil conditioners, etc., but in the extraction of valuable elements, waste gas treatment, porous materials and other high added value There are few successful cases of application in the field. Therefore, how to find ways to apply red mud with high added value and improve the comprehensive utilization rate of red mud has become a huge challenge for the alumina industry.
- Fillers and pigments account for about 20-60% of the paint quality. Paint is an important part of paint and plays an irreplaceable role in paint. Fillers and pigments are mostly derived from natural minerals, but with the development of the economy, natural resources and environmental protection have gradually attracted everyone's attention. The concept of "lucid waters and lush mountains are invaluable assets" has gradually been integrated into my country's economic development.
- the present invention provides a method for preparing composite pigments and fillers for coatings by utilizing red mud.
- a method for preparing composite pigments and fillers for coatings by utilizing red mud comprising performing solid alkali treatment, ultrafine processing, physical modification and chemical modification on red mud raw materials;
- the solid alkali treatment is to make red mud into slurry under the action of dispersant in the beating equipment, and then use an acidic neutralizer to prepare a 1-50% solution and add it to the beating equipment, stirring continuously. to the completion of the neutralization reaction;
- the ultra-fine processing steps include drying treatment and ultra-fine pulverization treatment, and the ultra-fine pulverization treatment is to use ultra-fine pulverizing equipment to pulverize the dried red mud;
- the step of physical modification includes mixing the physical modifier and the binding aid with the ultrafinely pulverized red mud to obtain composite pigments and fillers;
- the chemical modification step includes using modifying equipment to perform surface treatment on the composite pigment and filler with a modifier to obtain a modified composite pigment and filler.
- the production processes involved in the method of the present invention are all purely physical processes, and do not involve processes such as strong acid and alkali, high pressure, etc.
- the production process is safe, green, and environmentally friendly, without the discharge of three wastes, and is suitable for different types of red mud. Sex is higher.
- the composite pigment and filler produced by the method of the invention has uniform dispersion, good affinity with resin and excellent coloring effect, and can be widely used in the fields of paint, water paint and powder coating.
- the technical scheme of the invention not only solves the problems in the coating industry, but also truly realizes the green and high value-added utilization of red mud.
- FIG. 1 is a flow chart of a method for preparing composite pigments and fillers for coatings by using red mud according to an embodiment of the present invention.
- red mud has the characteristics of stable physical and chemical properties, high temperature resistance, acid and alkali corrosion resistance after being treated with alkali and high temperature during the formation process. Although the new red mud has strong alkalinity, it can be directly used in coatings after the alkalinity is weakened by appropriate treatment methods. Moreover, red mud contains a large amount of iron oxide (an important component of pigment iron red) and commonly used pigments and fillers such as quartz, calcite, and kaolinite, so red mud has the potential to produce composite pigments and fillers for coatings.
- iron oxide an important component of pigment iron red
- the method of the invention can prepare composite pigments and fillers (that is, the composite pigments and fillers have the functions of pigments and fillers at the same time) through a suitable production process, which not only solves the problems in the coating industry, but also realizes the improvement of red mud. Green high-value utilization.
- a method for preparing composite pigments and fillers for coatings by utilizing red mud is provided.
- the method mainly includes the following four steps: a solid alkali treatment step, an ultrafine processing step, and a physical modification. Steps and chemical modification steps Four processes:
- Solid alkali treatment uses acidic substances to neutralize the alkaline substances (mainly sodium hydroxide) in the red mud into insoluble salts, thereby reducing the pH value of the red mud.
- the alkali solidification process is to make red mud into a certain concentration slurry by beating equipment under the action of dispersant, and then add a certain amount of acid neutralizer to a solution of 1-50%, add it to the beating machine, and stir continuously. After a period of time, the neutralization reaction is completed.
- the ultrafine processing includes two processes of drying and ultrafine grinding.
- the drying is to select suitable drying equipment to dry the water content of the red mud after alkali solidification to less than 1%.
- the ultrafine pulverization is to use ultrafine pulverizing equipment to pulverize the dried red mud to a certain fineness.
- Chemical modification step use modification equipment, select appropriate modifier and dosage, and perform surface treatment on the material after physical modification under certain conditions to obtain modified composite pigments and fillers for water-based coatings, paints or powder coating.
- the purpose of performing the alkali-fixing treatment on the red mud is to reduce the alkali content in the red mud and adjust the pH value.
- the alkali solidification step is performed by the pulping equipment to bring the pH of the red mud below 9.
- the solid content of the red mud slurry is 30-80%, preferably 67%.
- the dispersant includes one or more of polyphosphate, sodium metasilicate, sodium disilicate, polycarboxylate, polymethacrylate, polyol, polyamine, polyether, and polysulfonate A combination of species, preferably sodium hexametaphosphate.
- the amount of the dispersant is 0-8% of the mass fraction of red mud, preferably 0.5%.
- the acidic neutralizing agent includes a combination of one or more of orthosilicic acid, disilicic acid and metasilicic acid, and the amount of the acidic neutralizing agent is 0-21% of the mass fraction of red mud.
- the ultra-fine processing step ultra-fine processing is performed on the alkali-solid red mud to obtain ultra-fine red mud powder
- the ultra-fine processing process includes two steps of drying and ultra-fine grinding.
- the step of drying the red mud is performed by a drying device, so that the water content of the red mud is less than 1%, and the drying device includes a fluidized bed dryer, a dispersing and drying pulverizer, a flash evaporation device, a filter press, Any one of centrifugal dryers, rotary dryers and drum dryers or any combination thereof, the temperature range of the drying step is 80-300°C, preferably 150°C.
- the dried red mud is ultra-finely pulverized to obtain ultra-fine red mud powder.
- the ultrafine pulverizing equipment includes any one or any combination of a ring roll mill, a mechanical mill, a ball mill, a jet mill, a steam mill, a hot air jet mill, a stirring mill and a sand mill.
- the step of magnetically separating the dried red mud is performed by a dry magnetic separator, and the range of the magnetic field strength of the dry magnetic separator is 0.02-2.0T.
- the particle size of the ultrafinely processed red mud particles is between 800-12500 mesh, preferably 8000 mesh or 10000 mesh.
- the purpose of physical modification of ultrafine red mud powder is to obtain composite pigments and fillers with controllable color, superior anticorrosion performance and stable coloration.
- the physical modification is done in a grinding chamber of an ultrafine pulverizing device.
- the physical modification is to feed the physical modifier, the bonding aid and the initially processed materials into the grinding chamber together for pulverization and mixing (for example, mixing uniformly);
- the physical modifier includes red red, strontium chrome yellow, Zinc chrome yellow, barium chrome yellow, calcium chrome yellow, phosphate, phosphomolybdate, aluminum dihydrogen tripolyphosphate, zinc molybdate, zinc borate, mica iron oxide, titanium dioxide, nano-zinc oxide, graphite, ultramarine blue, phthalate
- the physical modifier is 0%-30% of the mass fraction of red mud powder
- the adjuvant is sodium silicate, potassium
- the red mud powder is chemically modified to obtain the modified composite pigment and filler.
- the step of chemical modification is performed by a modification apparatus.
- the modification equipment includes any one or any combination of a three-roll modifier, a high-speed mixer and a tower modifier, and the modifier used in the surface modification is a silane coupling agent, an aluminate Any one of coupling agent, titanate coupling agent, rare earth coupling agent, fatty acid and its salt, polyalcohols, higher alcohols, or any combination thereof; the dosage of the modifier is red mud powder 0.01-25% (eg 10% or 15%) of the body mass; the temperature range for the surface modification is 50-300°C (eg 200°C).
- the coating is powder coating, water-based coating or paint.
- the water content of the red mud raw material of a factory in Yangquan, Shanxi province is 7%, and its main chemical composition is shown in Table 1.
- the processing techniques adopted are solid alkali, flash drying, ultrafine grinding, physical modification and chemical modification.
- the specific preparation process parameters are as follows: first, under the action of sodium polycarboxylate with a mass fraction of 0.3%, the red mud is beaten into a uniform slurry with a solid content of 70%, and then according to the red mud: orthosilicic acid is 98 : 2 ratio, add orthosilicic acid solution with a mass fraction of 2%, and stir continuously for 3h.
- the neutralized slurry was dried with a flash dryer to reduce the water content of the red mud to less than 1%.
- the inlet temperature of the flash dryer was set to 270°C and the outlet temperature was set to 100°C.
- the dried red mud, 1% strontium chrome yellow and 0.9% phthalocyanine blue are fed into the grinding chamber of the fluidized-bed jet mill, at a pressure of 0.85Mpa and a classifier speed of 1600rpm.
- Ultrafine pulverization and physical modification were carried out to obtain composite pigments and fillers A1; finally, a high-speed mixer was used for some of the materials after physical modification, and silane coupling agent (KH560) with a mass fraction of 1% was used as the modifier, at 120 Continuous stirring at °C for 15min, to obtain the modified composite pigment and filler A2, the particle size distribution of which is shown in Table 2.
- the raw material of red mud from a factory in Zibo, Shandong province has a fine particle size and a water content of 6.4%. Its main chemical composition is shown in Table 3.
- the processing technology adopted is solid alkali, flash drying, ultrafine pulverization, physical modification and chemical modification.
- the specific preparation process parameters are as follows: first, under the action of sodium tripolyphosphate with a mass fraction of 0.7%, the red mud is beaten into a uniform slurry with a solid content of 70%, and then according to the red mud: metasilicic acid is 97% : 3 ratio, add metasilicic acid solution with a mass fraction of 3%, and stir continuously for 3h.
- the slurry after solidification was first dried with a centrifugal dryer until the water content was within 5%. Then, the dried red mud, strontium chrome yellow with a mass fraction of 0.5% and phthalocyanine blue with a mass fraction of 0.7% are fed into the grinding chamber of the steam mill for ultra-fine grinding and physical modification.
- the temperature in the grinding chamber is 190°C
- the steam pressure is 1.4Mpa
- the steam temperature is 270°C.
- the modified composite pigment and filler B1 was prepared, and its particle size distribution is shown in Table 4.
- the composite pigment and filler prepared by the method of the present invention can play the dual role of pigment and filler, and can significantly improve the affinity and dispersibility with organic resins.
- the method of the present invention can not only reduce the production cost of the coating, but also can significantly improve the storage, corrosion resistance, weather resistance and other properties of the coating.
- the method of the invention has significant environmental protection significance and economic benefits, and has broad market prospects.
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Abstract
Embodiments of the present invention provide a method for preparing a composite pigment filler for a coating by using red mud. The method comprises: performing solid alkali treatment, ultra-fine processing, physical modification, and chemical modification on red mud raw materials. The solid alkali treatment is to prepare red mud into a slurry in a pulping apparatus under the action of a dispersing agent, then preparing the slurry into a solution of 1-50% by using an acidic neutralizing agent, and adding the solution into the pulping apparatus, and continuously stirring until the neutralization reaction is completed. The ultra-fine processing steps comprise drying treatment and ultrafine crushing treatment, and the ultrafine crushing treatment is performed by selecting a superfine crushing apparatus to crush dried red mud. The step of physical modification comprises: mixing a physical modifier and an adhesion promoter with the ultrafine crushed red mud to obtain a composite pigment filler. The step of chemical modification comprises performing surface treatment on the composite pigment filler with a modifier by using a modification apparatus to obtain a modified composite pigment filler.
Description
本发明属于工业固体废弃物绿色资源化利用领域，尤其涉及一种利用赤泥制备涂料用复合颜填料的方法。The invention belongs to the field of green resource utilization of industrial solid waste, and in particular relates to a method for preparing composite pigments and fillers for coatings by utilizing red mud.
赤泥是工业生产氧化铝过程中产生的副产物，因含有氧化铁颜色为暗红色，其化学成分包括Al
2O
3、CaO、Fe
2O
3、SiO
2、Na
2O和TiO
2，其矿物组成包括方解石、赤铁矿、磁铁矿、方钠石、高岭土、石英石、水铝石、钙霞石等。每生产1t氧化铝就会产生1-2t的赤泥，据统计中国赤泥的年产量接近7000万吨，总堆积量高达5亿吨。由于赤泥具有碱性强和盐分高的特征，导致其综合利用率不足5％，大量的赤泥露天堆放不仅占用大量土地，还会造成土壤、水体以及空气的污染，给自然环境带来巨大的破坏。目前，赤泥主要的应用领域是附加值较低的建材和农业领域，如制砖、路基材料、保温材料、土壤调理剂等，但在有价元素提取、废气处理、多孔材料等高附加值领域的应用鲜有成功案例。因此，如何寻找赤泥高附加值应用的途径，提高赤泥综合利用率，成为氧化铝产业面临的巨大挑战。
Red mud is a by-product produced in the industrial production of alumina. It is dark red in color because it contains iron oxide. Its chemical composition includes Al 2 O 3 , CaO, Fe 2 O 3 , SiO 2 , Na 2 O and TiO 2 . The mineral composition includes calcite, hematite, magnetite, sodalite, kaolin, quartzite, diaspore, cannonite, etc. For every 1t of alumina produced, 1-2t of red mud is produced. According to statistics, the annual output of red mud in China is close to 70 million tons, and the total accumulation is as high as 500 million tons. Because red mud has the characteristics of strong alkalinity and high salinity, its comprehensive utilization rate is less than 5%. of destruction. At present, the main application fields of red mud are building materials and agricultural fields with low added value, such as brick making, roadbed materials, thermal insulation materials, soil conditioners, etc., but in the extraction of valuable elements, waste gas treatment, porous materials and other high added value There are few successful cases of application in the field. Therefore, how to find ways to apply red mud with high added value and improve the comprehensive utilization rate of red mud has become a huge challenge for the alumina industry.
填料和颜料约占涂料质量的20-60％涂料是涂料重要的组成部分，在涂料中起到不可替代的作用。填料和颜料多来源于天然矿物，但随着经济的发展，自然资源和环境保护逐渐引起大家的关注，“绿水青山就是金山银山”的理念已经慢慢融入我国经济的发展。Fillers and pigments account for about 20-60% of the paint quality. Paint is an important part of paint and plays an irreplaceable role in paint. Fillers and pigments are mostly derived from natural minerals, but with the development of the economy, natural resources and environmental protection have gradually attracted everyone's attention. The concept of "lucid waters and lush mountains are invaluable assets" has gradually been integrated into my country's economic development.
如何节约和高附加值利用不可再生天然矿产资源和寻找替代品，已经成为摆在涂料行业面临的巨大难题。How to save and use non-renewable natural mineral resources with high added value and find alternatives has become a huge problem facing the coatings industry.
发明内容SUMMARY OF THE INVENTION
鉴于上述的现有赤泥综合利用方面和涂料颜填料存在的问题，本发明提供了一种利用赤泥制备涂料用复合颜填料的方法。In view of the above-mentioned problems of comprehensive utilization of existing red mud and paint pigments and fillers, the present invention provides a method for preparing composite pigments and fillers for coatings by utilizing red mud.
一种利用赤泥制备涂料用复合颜填料的方法，所述方法包括对赤泥原料进行固碱处理、超细加工处理、物理改性和化学改性；A method for preparing composite pigments and fillers for coatings by utilizing red mud, the method comprising performing solid alkali treatment, ultrafine processing, physical modification and chemical modification on red mud raw materials;
其中，所述固碱处理是在打浆设备中在分散剂的作用下，将赤泥制成浆料，然后用酸性中和剂配成1-50％的溶液并加入到打浆设备中，连续搅拌至中和反应完成；Among them, the solid alkali treatment is to make red mud into slurry under the action of dispersant in the beating equipment, and then use an acidic neutralizer to prepare a 1-50% solution and add it to the beating equipment, stirring continuously. to the completion of the neutralization reaction;
其中超细加工处理步骤包括干燥处理和超细粉碎处理，所述超细粉碎处理是选用超细粉碎设备将干燥后的赤泥粉碎；Wherein the ultra-fine processing steps include drying treatment and ultra-fine pulverization treatment, and the ultra-fine pulverization treatment is to use ultra-fine pulverizing equipment to pulverize the dried red mud;
所述物理改性的步骤包括将物理改性剂和粘合助剂与超细粉碎后的赤泥混合以得到复合颜填料；The step of physical modification includes mixing the physical modifier and the binding aid with the ultrafinely pulverized red mud to obtain composite pigments and fillers;
所述化学改性的步骤包括利用改性设备用改性剂对复合颜填料进行表面处理以得到改性复合颜填料。The chemical modification step includes using modifying equipment to perform surface treatment on the composite pigment and filler with a modifier to obtain a modified composite pigment and filler.
通过上述可知，本发明所述的方法所涉及的生产流程都为纯物理过程，不涉及强酸强碱、高压等过程，生产工艺安全、绿色、环保，无三废排放，对不同类型的赤泥适应性较高。由本发明所述方法生产的复合颜填料，分散均匀、与树脂亲和性好、着色效果优异，可广泛应用于油漆、水漆和粉末涂料领域。本发明的技术方案在解决了涂料行业难题的同时，真正实现对赤泥的绿色高附加值利用。It can be seen from the above that the production processes involved in the method of the present invention are all purely physical processes, and do not involve processes such as strong acid and alkali, high pressure, etc. The production process is safe, green, and environmentally friendly, without the discharge of three wastes, and is suitable for different types of red mud. Sex is higher. The composite pigment and filler produced by the method of the invention has uniform dispersion, good affinity with resin and excellent coloring effect, and can be widely used in the fields of paint, water paint and powder coating. The technical scheme of the invention not only solves the problems in the coating industry, but also truly realizes the green and high value-added utilization of red mud.
为了更清楚地说明本发明实施方式的技术方案，下面将将结合附图和详细实施方式对本发明进行详细说明，显而易见地，下面描述中的附图仅仅是本发明的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其它的附图。其中：In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, which are very important in the art. For those of ordinary skill, other drawings can also be obtained from these drawings without creative labor. in:
图1为根据本发明的一个实施例所述的利用赤泥制备涂料用复合颜填料的方法的流程图。FIG. 1 is a flow chart of a method for preparing composite pigments and fillers for coatings by using red mud according to an embodiment of the present invention.
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
经过长期的研究发现，赤泥在形成过程经过碱和高温的处理，具有物化性质稳定、耐高温、耐酸碱腐蚀等特点。虽然新生的赤泥碱性较强，但经过合适的处理手段，可以使碱性变弱而直接应用于涂料中。而且赤泥中含有大量的氧化铁(颜料铁红的重要组成部分)和石英、方解石、高岭石等常用颜料和填料，因此赤泥具备生产涂料用复合颜填料的潜力。After long-term research, it is found that red mud has the characteristics of stable physical and chemical properties, high temperature resistance, acid and alkali corrosion resistance after being treated with alkali and high temperature during the formation process. Although the new red mud has strong alkalinity, it can be directly used in coatings after the alkalinity is weakened by appropriate treatment methods. Moreover, red mud contains a large amount of iron oxide (an important component of pigment iron red) and commonly used pigments and fillers such as quartz, calcite, and kaolinite, so red mud has the potential to produce composite pigments and fillers for coatings.
本发明所述的方法能够针对赤泥的特性，通过合适的生产工艺制备出复合颜填料(即该复合颜填料同时具有颜料和填料的功能)，不仅解决涂料行业难题，也实现对赤泥的绿色高值化利用。According to the characteristics of red mud, the method of the invention can prepare composite pigments and fillers (that is, the composite pigments and fillers have the functions of pigments and fillers at the same time) through a suitable production process, which not only solves the problems in the coating industry, but also realizes the improvement of red mud. Green high-value utilization.
参见图1，根据本发明的实施例，提供了一种利用赤泥制备涂料用复合颜填料的方法，所述方法主要包括以下四个步骤：固碱处理步骤、超细加工步骤、物理改性步骤和化学改性 步骤四个过程：1, according to an embodiment of the present invention, a method for preparing composite pigments and fillers for coatings by utilizing red mud is provided. The method mainly includes the following four steps: a solid alkali treatment step, an ultrafine processing step, and a physical modification. Steps and chemical modification steps Four processes:
(1)固碱处理：所述固碱处理是利用酸性物质将赤泥内的碱性物质(以氢氧化钠为主)中和后变成不可溶性盐，降低赤泥的pH值。所述固碱过程是由打浆设备在分散剂的作用下，将赤泥制成一定浓度的浆料，然后再将一定量酸性中和剂配成1-50％的溶液加入打浆机，连续搅拌一段时间，至中和反应完成。(1) Solid alkali treatment: The solid alkali treatment uses acidic substances to neutralize the alkaline substances (mainly sodium hydroxide) in the red mud into insoluble salts, thereby reducing the pH value of the red mud. The alkali solidification process is to make red mud into a certain concentration slurry by beating equipment under the action of dispersant, and then add a certain amount of acid neutralizer to a solution of 1-50%, add it to the beating machine, and stir continuously. After a period of time, the neutralization reaction is completed.
(2)超细加工步骤：所述超细加工包括干燥和超细粉碎两个过程。所述干燥是选用合适的干燥设备将固碱后赤泥含水量干燥至1％以下。所述超细粉碎是选用超细粉碎设备将干燥后的赤泥粉碎至一定细度。(2) Ultrafine processing step: The ultrafine processing includes two processes of drying and ultrafine grinding. The drying is to select suitable drying equipment to dry the water content of the red mud after alkali solidification to less than 1%. The ultrafine pulverization is to use ultrafine pulverizing equipment to pulverize the dried red mud to a certain fineness.
(3)物理改性步骤：将一定量的物理改性剂，在少量的粘合助剂和机械力化学的作用下，与超细赤泥粉混合(例如混合均匀并紧密结合)得到复合颜填料，可用于水性涂料、油漆或粉末涂料。(3) Physical modification step: Mix a certain amount of physical modifier with ultra-fine red mud powder under the action of a small amount of bonding aid and mechanochemistry (for example, mix evenly and tightly combine) to obtain a composite pigment Filler for waterborne coatings, paints or powder coatings.
(4)化学改性步骤：利用改性设备，选择合适的改性剂及用量，在一定条件下对物理改性后物料进行表面处理，制得改性复合颜填料用于水性涂料、油漆或粉末涂料。(4) Chemical modification step: use modification equipment, select appropriate modifier and dosage, and perform surface treatment on the material after physical modification under certain conditions to obtain modified composite pigments and fillers for water-based coatings, paints or powder coating.
具体地，在固碱步骤中，对赤泥进行固碱处理的目的是降低赤泥中碱含量和调节pH值。在一个示例中，由打浆设备执行固碱步骤，使赤泥的pH值下降到9以下。所述赤泥浆料的固含量为30-80％，优选地67％。所述分散剂包括聚磷酸盐、偏硅酸钠、二硅酸钠、聚羧酸盐、聚甲基丙烯酸盐、多元醇、多元胺、聚醚、聚磺酸盐中的一种或更多种的组合，优选地六偏磷酸钠。所述分散剂的用量为赤泥质量分数的0-8％，优选地0.5％。所述酸性中和剂包括原硅酸、二硅酸和偏硅酸中的一种或更多种的组合，所述酸性中和剂的用量为赤泥质量分数的0-21％。Specifically, in the alkali-fixing step, the purpose of performing the alkali-fixing treatment on the red mud is to reduce the alkali content in the red mud and adjust the pH value. In one example, the alkali solidification step is performed by the pulping equipment to bring the pH of the red mud below 9. The solid content of the red mud slurry is 30-80%, preferably 67%. The dispersant includes one or more of polyphosphate, sodium metasilicate, sodium disilicate, polycarboxylate, polymethacrylate, polyol, polyamine, polyether, and polysulfonate A combination of species, preferably sodium hexametaphosphate. The amount of the dispersant is 0-8% of the mass fraction of red mud, preferably 0.5%. The acidic neutralizing agent includes a combination of one or more of orthosilicic acid, disilicic acid and metasilicic acid, and the amount of the acidic neutralizing agent is 0-21% of the mass fraction of red mud.
进一步地，在超细加工步骤中，对固碱的赤泥进行超细加工以得到超细赤泥粉末，所述超细加工过程包括干燥和超细粉碎两个步骤。由干燥设备执行所述干燥赤泥的步骤，以使得赤泥的含水量低于1％，所述干燥设备包括流化床式干燥机、打散干燥粉碎机、闪蒸设备、压滤机、离心式干燥机、回转干燥机和滚筒式干燥机中的任一种或它们的任意组合，所述干燥步骤的温度范围为80-300℃，优选地150℃。将干燥后的赤泥进行超细粉碎，得到超细赤泥粉。所述超细粉碎设备包括环辊磨、机械磨、球磨机、气流磨、蒸汽磨、热空气气流磨、搅拌磨和砂磨机中的任一种或它们的任意组合。Further, in the ultra-fine processing step, ultra-fine processing is performed on the alkali-solid red mud to obtain ultra-fine red mud powder, and the ultra-fine processing process includes two steps of drying and ultra-fine grinding. The step of drying the red mud is performed by a drying device, so that the water content of the red mud is less than 1%, and the drying device includes a fluidized bed dryer, a dispersing and drying pulverizer, a flash evaporation device, a filter press, Any one of centrifugal dryers, rotary dryers and drum dryers or any combination thereof, the temperature range of the drying step is 80-300°C, preferably 150°C. The dried red mud is ultra-finely pulverized to obtain ultra-fine red mud powder. The ultrafine pulverizing equipment includes any one or any combination of a ring roll mill, a mechanical mill, a ball mill, a jet mill, a steam mill, a hot air jet mill, a stirring mill and a sand mill.
优选地，由干法磁选机执行对干燥后的赤泥进行磁选的步骤，所述干法磁选机的磁场强度的范围为0.02-2.0T。所述超细加工后的赤泥的颗粒的粒度在800-12500目之间，优选地8000目或10000目。Preferably, the step of magnetically separating the dried red mud is performed by a dry magnetic separator, and the range of the magnetic field strength of the dry magnetic separator is 0.02-2.0T. The particle size of the ultrafinely processed red mud particles is between 800-12500 mesh, preferably 8000 mesh or 10000 mesh.
对超细赤泥粉进行物理改性的目的在于得到颜色可控、防腐性能优越、着色稳定的复合颜填料。在一个示例中，所述物理改性在超细粉碎设备的磨腔内完成。所述物理改性是将物理改性剂、粘合助剂和初加工后物料一起喂入磨腔内粉碎并混合(例如混合均匀)；所述物理改性剂包括红丹、锶铬黄、锌铬黄、钡铬黄、钙铬黄、磷酸盐、磷钼酸盐、三聚磷酸二氢铝、钼酸锌、硼酸锌、云母氧化铁、钛白粉、纳米氧化锌、石墨、群青、酞菁蓝、硫酸钡、铁红、铁黑、硫酸钡等物质中的任一种或更多种的混合物；所述物理改性剂为赤泥粉质量分数的0％-30％；所述粘合助剂为硅酸钠、硅酸钾、双硅烷偶联剂等；所述粘合助剂为赤泥粉质量分数的0％-5％。The purpose of physical modification of ultrafine red mud powder is to obtain composite pigments and fillers with controllable color, superior anticorrosion performance and stable coloration. In one example, the physical modification is done in a grinding chamber of an ultrafine pulverizing device. The physical modification is to feed the physical modifier, the bonding aid and the initially processed materials into the grinding chamber together for pulverization and mixing (for example, mixing uniformly); the physical modifier includes red red, strontium chrome yellow, Zinc chrome yellow, barium chrome yellow, calcium chrome yellow, phosphate, phosphomolybdate, aluminum dihydrogen tripolyphosphate, zinc molybdate, zinc borate, mica iron oxide, titanium dioxide, nano-zinc oxide, graphite, ultramarine blue, phthalate A mixture of any one or more of cyanine blue, barium sulfate, iron red, iron black, barium sulfate, etc.; the physical modifier is 0%-30% of the mass fraction of red mud powder; The adjuvant is sodium silicate, potassium silicate, disilane coupling agent, etc.; the adhering adjuvant is 0%-5% of the mass fraction of red mud powder.
在一个示例中，在物理改性赤泥步骤之后，对赤泥粉进行化学改性以得到改性复合颜填料。在一些实施例中，由改性设备执行所述化学改性的步骤。所述改性设备包括三辊改性机、高速搅拌机和塔式改性机中的任一种或它们的任意组合，所述表面改性使用的改性剂为硅烷偶联剂、铝酸酯偶联剂、钛酸酯偶联剂、稀土偶联剂、脂肪酸及其盐、聚醇类物质、高级醇类中的任一种或它们的任意组合；所述改性剂用量为赤泥粉体质量的0.01-25％(例如10％或15％)；所述表面改性的温度范围为50-300℃(例如200℃)。In one example, after the step of physically modifying the red mud, the red mud powder is chemically modified to obtain the modified composite pigment and filler. In some embodiments, the step of chemical modification is performed by a modification apparatus. The modification equipment includes any one or any combination of a three-roll modifier, a high-speed mixer and a tower modifier, and the modifier used in the surface modification is a silane coupling agent, an aluminate Any one of coupling agent, titanate coupling agent, rare earth coupling agent, fatty acid and its salt, polyalcohols, higher alcohols, or any combination thereof; the dosage of the modifier is red mud powder 0.01-25% (eg 10% or 15%) of the body mass; the temperature range for the surface modification is 50-300°C (eg 200°C).
综上可知，所述涂料为粉末涂料、水性涂料或油漆。To sum up, the coating is powder coating, water-based coating or paint.
以下提供了几个具体的实施例来详细说明本发明的方法的各个步骤，显然，本发明的技术方案不限于下述提供的实施例的限制。Several specific examples are provided below to describe in detail each step of the method of the present invention. Obviously, the technical solution of the present invention is not limited to the limitations of the examples provided below.
实施例1Example 1
山西省阳泉某厂赤泥原料含水量为7％其主要化学组成如表1所示。在本实施例中，采用的加工工艺为固碱、闪蒸干燥、超细粉碎、物理改性和化学改性。具体制备工艺参数如下：首先利用打浆机在质量分数为0.3％的聚羧酸钠的作用下，将赤泥打成固含量为70％的均匀浆料，然后按照赤泥：原硅酸为98:2的比例，加入质量分数为2％的原硅酸溶液，连续搅拌3h。将中和后的浆料用闪蒸干燥机进行干燥，将赤泥含水量降低到1％以内，闪蒸干燥机设备入口温度设定为270℃，出口温度设定为100℃。将干燥后的赤泥、质量分数为1％的锶铬黄和质量分数为0.9％的酞菁蓝一起喂入流化床式气流磨的磨腔内，在0.85Mpa压力和1600rpm的分级机转速下进行超细粉碎和物理改性，得到复合颜填料A1；最后对物理改性后的部分物料利用高速搅拌机，以质量分数为1％的硅烷偶联剂(KH560)为改性剂，在120℃下连续搅拌15min，制得改性后复合颜填料A2，其粒度分布如表2所示。The water content of the red mud raw material of a factory in Yangquan, Shanxi Province is 7%, and its main chemical composition is shown in Table 1. In this embodiment, the processing techniques adopted are solid alkali, flash drying, ultrafine grinding, physical modification and chemical modification. The specific preparation process parameters are as follows: first, under the action of sodium polycarboxylate with a mass fraction of 0.3%, the red mud is beaten into a uniform slurry with a solid content of 70%, and then according to the red mud: orthosilicic acid is 98 : 2 ratio, add orthosilicic acid solution with a mass fraction of 2%, and stir continuously for 3h. The neutralized slurry was dried with a flash dryer to reduce the water content of the red mud to less than 1%. The inlet temperature of the flash dryer was set to 270°C and the outlet temperature was set to 100°C. The dried red mud, 1% strontium chrome yellow and 0.9% phthalocyanine blue are fed into the grinding chamber of the fluidized-bed jet mill, at a pressure of 0.85Mpa and a classifier speed of 1600rpm. Ultrafine pulverization and physical modification were carried out to obtain composite pigments and fillers A1; finally, a high-speed mixer was used for some of the materials after physical modification, and silane coupling agent (KH560) with a mass fraction of 1% was used as the modifier, at 120 Continuous stirring at ℃ for 15min, to obtain the modified composite pigment and filler A2, the particle size distribution of which is shown in Table 2.
表1物料化学组成Table 1 Chemical composition of materials
表2不同填料粒度分布Table 2 Particle size distribution of different fillers
实施例2Example 2
山东省淄博某厂赤泥原料粒度较细，含水量为6.4％其主要化学组成如表3所示。在本实施例中，采用的加工工艺为固碱、闪蒸干燥、超细粉碎、物理改性和化学改性。具体制备工艺参数如下：首先利用打浆机在质量分数为0.7％的三聚磷酸钠的作用下，将赤泥打成固含量为70％的均匀浆料，然后按照赤泥：偏硅酸为97:3的比例，加入质量分数为3％的偏硅酸溶液，连续搅拌3h。将固碱后的浆料用首先用离心式干燥机，干燥至水含量为5％以内。然后将干燥后的赤泥、质量分数为0.5％的锶铬黄和质量分数为0.7％的酞菁蓝一起喂入蒸汽磨的磨腔内，进行超细粉碎和物理改性，其中蒸汽磨的磨腔内温度为190℃，蒸汽压力为1.4Mpa，蒸汽温度为270℃。制得改性后复合颜填料B1，其粒度分布如表4所示。最后，对物理改性后的物料，通过三辊改性机，在100℃下，以质量分数为0.7％的硅烷偶联剂(KH560)和质量分数为0.3％的硅烷偶联剂(KH540)为改性剂，完成化学改性制得改性复合颜填料B2，其粒度分布如表4所示。The raw material of red mud from a factory in Zibo, Shandong Province has a fine particle size and a water content of 6.4%. Its main chemical composition is shown in Table 3. In this embodiment, the processing technology adopted is solid alkali, flash drying, ultrafine pulverization, physical modification and chemical modification. The specific preparation process parameters are as follows: first, under the action of sodium tripolyphosphate with a mass fraction of 0.7%, the red mud is beaten into a uniform slurry with a solid content of 70%, and then according to the red mud: metasilicic acid is 97% : 3 ratio, add metasilicic acid solution with a mass fraction of 3%, and stir continuously for 3h. The slurry after solidification was first dried with a centrifugal dryer until the water content was within 5%. Then, the dried red mud, strontium chrome yellow with a mass fraction of 0.5% and phthalocyanine blue with a mass fraction of 0.7% are fed into the grinding chamber of the steam mill for ultra-fine grinding and physical modification. The temperature in the grinding chamber is 190℃, the steam pressure is 1.4Mpa, and the steam temperature is 270℃. The modified composite pigment and filler B1 was prepared, and its particle size distribution is shown in Table 4. Finally, the material after physical modification is passed through a three-roll modifier at 100 ° C, with a mass fraction of 0.7% silane coupling agent (KH560) and a mass fraction of 0.3% silane coupling agent (KH540) As a modifier, chemical modification was completed to obtain a modified composite pigment and filler B2, and its particle size distribution was shown in Table 4.
表3物料化学组成Table 3 Chemical composition of materials
表4不同填料粒度分布Table 4 Particle size distribution of different fillers
实施例3Example 3
利用实施例1和实施例2中制备的改性复合颜填料A2和B2，在灰色防腐油漆中与常用的颜填料体系(炭黑+钛白体+碳酸钙，对照例)进行对比实验，涂料配方和性能对比如表5所示：Using the modified composite pigments and fillers A2 and B2 prepared in Example 1 and Example 2, a comparison experiment was carried out in gray anti-corrosion paint with a commonly used pigment and filler system (carbon black + titanium dioxide + calcium carbonate, control example). The formula and performance comparison are shown in Table 5:
表5灰色防腐油漆配方、涂料制备工艺及性能对比Table 5 Gray anti-corrosion paint formulation, paint preparation process and performance comparison
实施例4Example 4
利用实施例1和实施例2中制备的复合颜填料A1和B2，在灰色防腐水性涂料中与常用的颜填料体系(炭黑+钛白体+碳酸钙，对照例)进行对比实验。涂料配方和性能对比如表6所示：Using the composite pigments and fillers A1 and B2 prepared in Example 1 and Example 2, a comparison experiment was carried out with the commonly used pigment and filler systems (carbon black + titanium dioxide + calcium carbonate, control example) in gray anti-corrosion waterborne coatings. Coating formulations and performance comparisons are shown in Table 6:
表6灰色防腐水性涂料配方、涂料制备工艺及性能对比Table 6 Gray anti-corrosion water-based paint formulation, paint preparation process and performance comparison
实施例5Example 5
利用实施例1和实施例2中制备的改性复合颜填料A2和B2，在灰色粉末涂料中与常用的颜填料体系(炭黑+钛白体+碳酸钙，对照例)进行对比实验，涂料配方和性能对比如表7所示：Using the modified composite pigments and fillers A2 and B2 prepared in Example 1 and Example 2, a comparison experiment was carried out with the commonly used pigment and filler systems (carbon black + titanium dioxide + calcium carbonate, control example) in gray powder coatings. The formula and performance comparison are shown in Table 7:
表7粉末涂料配方、涂料制备工艺及性能对比Table 7 Powder coating formulation, coating preparation process and performance comparison
通过上述的对比分析可以明显看出，通过本发明所述的方法制备的复合颜填料，能够起到颜料和填料的双重作用，而且能够显著提高与机树脂的亲和性和分散性。与常用的颜填料体系相比，本发明所述的方法不仅能够降低涂料生产成本，而且能够显著提高涂料的储存、防腐、耐候性等性能。本发明所述的方法具有显著的环保意义和经济效益，市场前景广阔。It can be clearly seen from the above comparative analysis that the composite pigment and filler prepared by the method of the present invention can play the dual role of pigment and filler, and can significantly improve the affinity and dispersibility with organic resins. Compared with the commonly used pigment and filler systems, the method of the present invention can not only reduce the production cost of the coating, but also can significantly improve the storage, corrosion resistance, weather resistance and other properties of the coating. The method of the invention has significant environmental protection significance and economic benefits, and has broad market prospects.
虽然本总体发明构思的一些实施例已被显示和说明，本领域普通技术人员将理解，在不背离本总体发明构思的原则和精神的情况下，可对这些实施例做出改变，本发明的范围以权利要求和它们的等同物限定。Although some embodiments of the present general inventive concept have been shown and described, those of ordinary skill in the art will understand that The scope is defined by the claims and their equivalents.
Claims (18)
- 一种利用赤泥制备涂料用复合颜填料的方法，所述方法包括对赤泥原料进行固碱处理、超细加工处理、物理改性和化学改性；A method for preparing composite pigments and fillers for coatings by utilizing red mud, the method comprising performing solid alkali treatment, ultrafine processing, physical modification and chemical modification on red mud raw materials;其中，所述固碱处理是在打浆设备中在分散剂的作用下，将赤泥制成浆料，然后用酸性中和剂配成1-50％的溶液并加入到打浆设备中，连续搅拌至中和反应完成；Among them, the solid alkali treatment is to make red mud into slurry under the action of dispersant in the beating equipment, and then use an acidic neutralizer to prepare a 1-50% solution and add it to the beating equipment, stirring continuously. to the completion of the neutralization reaction;其中超细加工处理步骤包括干燥处理和超细粉碎处理，所述干燥处理是干燥固碱处理后的赤泥，所述超细粉碎处理是选用超细粉碎设备将干燥后的赤泥粉碎；Wherein the ultra-fine processing steps include drying treatment and ultra-fine pulverization treatment, the drying treatment is to dry the red mud after solid alkali treatment, and the ultra-fine pulverization treatment is to use ultra-fine pulverizing equipment to pulverize the dried red mud;所述物理改性的步骤包括将物理改性剂和粘合助剂与超细粉碎后的赤泥混合以得到复合颜填料；The step of physical modification includes mixing the physical modifier and the binding aid with the ultrafinely pulverized red mud to obtain composite pigments and fillers;所述化学改性的步骤包括利用改性设备用改性剂对复合颜填料进行表面处理以得到改性复合颜填料。The chemical modification step includes using modifying equipment to perform surface treatment on the composite pigment and filler with a modifier to obtain a modified composite pigment and filler.
- 根据权利要求1所述的方法，其中，所述固碱处理后的赤泥的pH值降到9以下，赤泥的浆料的固含量为30-80％。The method according to claim 1, wherein the pH value of the red mud after the solid alkali treatment is reduced to below 9, and the solid content of the red mud slurry is 30-80%.
- 根据权利要求1或2所述的方法，其中，所述分散剂包括聚磷酸盐、偏硅酸钠、二硅酸钠、聚羧酸盐、聚甲基丙烯酸盐、多元醇、多元胺、聚醚、聚磺酸盐中的一种或更多种的组合，所述分散剂用量为赤泥质量分数的0-8％。The method according to claim 1 or 2, wherein the dispersing agent comprises polyphosphate, sodium metasilicate, sodium disilicate, polycarboxylate, polymethacrylate, polyol, polyamine, poly A combination of one or more of ether and polysulfonate, the amount of the dispersant is 0-8% of the mass fraction of red mud.
- 根据权利要求1-3中任一项所述的方法，其中，所述酸性中和剂包括原硅酸、二硅酸和偏硅酸中的一种或更多种的组合，所述酸性中和剂的用量为赤泥质量分数的0-21％。The method of any one of claims 1-3, wherein the acidic neutralizing agent comprises a combination of one or more of orthosilicic acid, disilicic acid, and metasilicic acid, the acid neutralizing The dosage of the blending agent is 0-21% of the mass fraction of red mud.
- 根据权利要求1-4中任一项所述的方法，其中，由干燥设备执行赤泥的干燥步骤以使得赤泥的含水量低于1％。The method according to any one of claims 1-4, wherein the drying step of the red mud is performed by a drying device such that the water content of the red mud is below 1%.
- 根据权利要求5所述的方法，其中，所述干燥设备包括流化床式干燥机、打散干燥粉碎机、闪蒸设备、压滤机、离心式干燥机、回转干燥机和滚筒式干燥机中的任一种或它们的任意组合，所述干燥步骤的温度范围为80-300℃。The method of claim 5, wherein the drying equipment comprises a fluidized bed dryer, a break-drying pulverizer, a flash evaporation device, a filter press, a centrifugal dryer, a rotary dryer, and a drum dryer Any one of them or any combination thereof, the temperature range of the drying step is 80-300°C.
- 根据权利要求1-6中任一项所述的方法，其中，所述超细粉碎处理包括利用超细粉 碎设备将干燥后的赤泥进行超细粉碎以得到超细赤泥粉。The method according to any one of claims 1-6, wherein the ultrafine pulverization process comprises ultrafine pulverization of the dried red mud by using an ultrafine pulverization device to obtain ultrafine red mud powder.
- 根据权利要求7所述的方法，其中，所述超细粉碎设备包括环辊磨、机械磨、球磨机、气流磨、蒸汽磨、热空气气流磨、搅拌磨和砂磨机中的任一种或它们的任意组合。The method according to claim 7, wherein the ultrafine pulverizing equipment comprises any one of a ring roll mill, a mechanical mill, a ball mill, a jet mill, a steam mill, a hot air jet mill, a stirring mill and a sand mill or any combination of them.
- 根据权利要求5所述的方法，其中，由干法磁选机执行对干燥后的赤泥进行磁选，所述干法磁选机的磁场强度的范围为0.02-2.0T，所述超细加工后的赤泥的颗粒的粒度在800-12500目之间。The method according to claim 5, wherein the magnetic separation of the dried red mud is performed by a dry magnetic separator, the magnetic field strength of the dry magnetic separator is in the range of 0.02-2.0T, the ultrafine The particle size of the processed red mud is between 800-12500 mesh.
- 根据权利要求1所述的方法，其中，所述物理改性在超细粉碎设备的磨腔内进行。The method of claim 1, wherein the physical modification is carried out in a grinding chamber of an ultrafine pulverizing device.
- 根据权利要求10所述的方法，其中，所述物理改性是将物理改性剂、粘合助剂和初加工后物料一起喂入磨腔内粉碎并混合。The method according to claim 10, wherein the physical modification is to feed the physical modifier, the bonding aid and the initially processed material into the grinding chamber together for pulverization and mixing.
- 根据权利要求11所述的方法，其中，所述物理改性剂包括红丹、锶铬黄、锌铬黄、钡铬黄、钙铬黄、磷酸盐、磷钼酸盐、三聚磷酸二氢铝、钼酸锌、硼酸锌、云母氧化铁、钛白粉、纳米氧化锌、石墨、群青、酞菁蓝、硫酸钡、铁红、铁黑、硫酸钡中的任一种或更多种的混合物；所述物理改性剂为赤泥粉质量分数的0％-30％。The method according to claim 11, wherein the physical modifier comprises red red, strontium chrome yellow, zinc chrome yellow, barium chrome yellow, calcium chrome yellow, phosphate, phosphomolybdate, dihydrogen tripolyphosphate A mixture of any one or more of aluminum, zinc molybdate, zinc borate, mica iron oxide, titanium dioxide, nano-zinc oxide, graphite, ultramarine blue, phthalocyanine blue, barium sulfate, iron red, iron black, barium sulfate ; The physical modifier is 0%-30% of the mass fraction of the red mud powder.
- 根据权利要求12所述的方法，其中，所述粘合助剂为硅酸钠、硅酸钾、双硅烷偶联剂；所述粘合助剂为赤泥粉质量分数的0％-5％。The method according to claim 12, wherein the adhesion assistant is sodium silicate, potassium silicate, and a bisilane coupling agent; and the adhesion assistant is 0%-5% of the mass fraction of red mud powder .
- 根据权利要求1所述的方法，其中，由改性设备执行所述化学改性的步骤。The method of claim 1, wherein the step of chemical modification is performed by a modification apparatus.
- 根据权利要求14所述的方法，其中，所述改性设备包括三辊改性机、高速搅拌机和塔式改性机中的任一种或它们的任意组合。The method of claim 14, wherein the reforming equipment comprises any one of a three-roll reformer, a high-speed mixer and a tower reformer or any combination thereof.
- 根据权利要求15所述的方法，其中，所述表面改性使用的改性剂为硅烷偶联剂、铝酸酯偶联剂、钛酸酯偶联剂、稀土偶联剂、脂肪酸及其盐、聚醇类物质、高级醇类中的任一种或它们的任意组合；所述改性剂用量为赤泥粉体质量的0.01-25％。The method according to claim 15, wherein the modifier used in the surface modification is a silane coupling agent, an aluminate coupling agent, a titanate coupling agent, a rare earth coupling agent, a fatty acid and a salt thereof , any one of polyalcohols, higher alcohols or any combination thereof; the dosage of the modifier is 0.01-25% of the mass of the red mud powder.
- 根据权利要求14-16中任一项所述的方法，其中，所述表面改性的温度范围为50-300℃。The method of any one of claims 14-16, wherein the temperature range of the surface modification is 50-300°C.
- 根据权利要求1-17中任一项所述的方法，其中，所述涂料为粉末涂料、水性涂料或油漆。The method according to any one of claims 1-17, wherein the coating is powder coating, water-based coating or paint.
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