CN115872712A - Dry-process-molded A-grade inorganic magnesium fireproof plate, preparation method and calender equipment - Google Patents
Dry-process-molded A-grade inorganic magnesium fireproof plate, preparation method and calender equipment Download PDFInfo
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- CN115872712A CN115872712A CN202211504074.XA CN202211504074A CN115872712A CN 115872712 A CN115872712 A CN 115872712A CN 202211504074 A CN202211504074 A CN 202211504074A CN 115872712 A CN115872712 A CN 115872712A
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 237
- 239000011777 magnesium Substances 0.000 title claims abstract description 237
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 237
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 245
- 239000004744 fabric Substances 0.000 claims abstract description 195
- 239000000835 fiber Substances 0.000 claims abstract description 138
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 11
- 239000000701 coagulant Substances 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims description 379
- 229940091250 magnesium supplement Drugs 0.000 claims description 230
- 239000002585 base Substances 0.000 claims description 51
- 238000003825 pressing Methods 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 25
- 239000000853 adhesive Substances 0.000 claims description 22
- 230000001070 adhesive effect Effects 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 22
- 238000003490 calendering Methods 0.000 claims description 19
- 239000004094 surface-active agent Substances 0.000 claims description 17
- 239000003513 alkali Substances 0.000 claims description 15
- 229920003023 plastic Polymers 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 12
- 239000013590 bulk material Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000002344 surface layer Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 7
- 239000000839 emulsion Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 3
- 239000010424 alunite Substances 0.000 claims description 3
- 229910052934 alunite Inorganic materials 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000004898 kneading Methods 0.000 claims description 3
- 229940050906 magnesium chloride hexahydrate Drugs 0.000 claims description 3
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical group O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 claims description 3
- WRUGWIBCXHJTDG-UHFFFAOYSA-L magnesium sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Mg+2].[O-]S([O-])(=O)=O WRUGWIBCXHJTDG-UHFFFAOYSA-L 0.000 claims description 3
- 229940061634 magnesium sulfate heptahydrate Drugs 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
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- 239000011118 polyvinyl acetate Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
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- 150000003505 terpenes Chemical class 0.000 claims description 3
- 235000007586 terpenes Nutrition 0.000 claims description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 3
- KPZTWMNLAFDTGF-UHFFFAOYSA-D trialuminum;potassium;hexahydroxide;disulfate Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O KPZTWMNLAFDTGF-UHFFFAOYSA-D 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 description 22
- 230000008569 process Effects 0.000 description 15
- 230000000754 repressing effect Effects 0.000 description 14
- 239000000203 mixture Substances 0.000 description 9
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 8
- 230000006872 improvement Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 229960002337 magnesium chloride Drugs 0.000 description 4
- 229910001629 magnesium chloride Inorganic materials 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
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- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
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- 241000196324 Embryophyta Species 0.000 description 1
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- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
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- 239000011398 Portland cement Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- HIGRAKVNKLCVCA-UHFFFAOYSA-N alumine Chemical compound C1=CC=[Al]C=C1 HIGRAKVNKLCVCA-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 235000010338 boric acid Nutrition 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
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- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000004079 fireproofing Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 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 1
- 239000004571 lime Substances 0.000 description 1
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- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
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- 229920000728 polyester Polymers 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 235000011083 sodium citrates Nutrition 0.000 description 1
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- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
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Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a dry-method-formed A-grade inorganic magnesium fireproof plate, a preparation method and calender equipment, wherein the inorganic magnesium fireproof plate comprises an inorganic magnesium base material layer, a base fiber grid cloth layer, an inorganic magnesium middle material layer, a surface fiber grid cloth layer and an inorganic magnesium fabric layer which are sequentially formed, the inorganic magnesium fireproof plate mainly comprises inorganic active magnesium oxide, a coagulant and an auxiliary inorganic gel material, and the product has inorganic environmental protection, high strength, deformation resistance, low water content and achieves A-grade fireproof performance.
Description
Technical Field
The invention relates to the field of artificial fireproof decorative plates, in particular to a dry-method-formed A-grade inorganic magnesium fireproof plate, a preparation method and calender equipment.
Background
At present, in building decoration, in order to guarantee life safety of people and reduce property loss in sudden fire, the requirement on the fire resistance grade of building decoration materials is continuously improved, so fire-proof plates, in particular A-grade inorganic magnesium fire-proof plates with higher fire resistance are frequently used.
The existing A-grade inorganic magnesium fireproof plate adopts a wet pulp flow forming process, and in order to meet the requirement that when the magnesium fireproof plate is prepared by the forming process, a large amount of material is used for mixing water to prepare a flowing magnesium dilute slurry, so that the forming process requirement can be met.
The wet pulp flow forming process needs to use a large amount of material mixing water to form a flowing magnesium thin slurry, the formed magnesium fireproof plate has extremely high water content and is easy to deform, and in order to ensure the qualified factory water content of the magnesium fireproof plate, a longer natural maintenance period is required and the water content of the product is corrected by adopting drying equipment, so that the production efficiency of the product is reduced, the production cost is increased, a large amount of heat energy is consumed, and the requirements of the national policy of vigorously advocating energy conservation and emission reduction are not met.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a dry-forming A-grade inorganic magnesium fireproof plate, a preparation method and calender equipment.
The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of a dry-method-formed A-grade inorganic magnesium fireproof plate comprises the following preparation steps:
1) After the aqueous adhesive, the aqueous tackifier, the surfactant and the retarder are measured according to the weight percentage, putting the aqueous adhesive, the aqueous tackifier, the surfactant and the retarder into a reaction kettle, heating the aqueous adhesive, the aqueous tackifier, the surfactant and the retarder to 85-95 ℃, stirring the aqueous adhesive, the aqueous tackifier, the surfactant and the retarder to react for 40-50 minutes, adding the coagulant which is measured according to the weight percentage, continuously stirring the aqueous adhesive and the retarder to react for 15-25 minutes, cooling the aqueous adhesive, the aqueous tackifier, the surfactant and the retarder to 25-35 ℃ after the stirring is finished, and discharging the aqueous adhesive;
2) Pouring the material prepared in the step 1) into a kneader, pouring light-burned magnesia powder, alumine powder, an expanding agent, an alkaline regulator, functional short fibers and light filler into the kneader after being measured according to the weight percentage, kneading the materials together for 10 to 15 minutes to form a plastic non-stick dry mud bulk material for later use;
3) Placing the prepared plastic non-sticky dry sludge bulk material into a bottom material layer forming calender unit, calendering to obtain an inorganic magnesium bottom material layer skin with the thickness of 0.5-6MM after passing through a roller of the bottom material layer forming calender unit, and paving the inorganic magnesium bottom material layer skin on a template which moves synchronously below the inorganic magnesium bottom material layer to form the inorganic magnesium bottom material layer;
4) Moving the template in the step 3) forward to the lower part of a bottom fiber grid cloth frame, and laying a layer of fiber grid cloth on the inorganic magnesium substrate layer to form a bottom fiber grid cloth layer;
5) Moving the template in the step 4) forward to the position below an inorganic magnesium intermediate material layer forming calender unit, putting the prepared plastic non-sticky dry mud bulk material into the intermediate material layer forming calender unit, calendering to form an inorganic magnesium intermediate material layer skin with the thickness of 1-50MM after passing through a roller of the intermediate material layer forming calender unit, and flatly paving the inorganic magnesium intermediate material layer on a bottom fiber mesh fabric layer below to form the inorganic magnesium intermediate material layer;
6) Moving the template in the step 5) forward to the lower part of a surface layer fiber grid cloth frame, and laying a layer of fiber grid cloth on the inorganic magnesium intermediate material layer to form the surface layer fiber grid cloth layer;
7) Moving the template in the step 6) forward to the lower part of a fabric layer forming calender unit, putting the prepared plastic non-sticky dry mud bulk material into the fabric layer forming calender unit, calendering to obtain an inorganic magnesium fabric layer skin with the thickness of 0.5-6MM after passing through a roller of the fabric layer forming calender unit, and flatly paving the inorganic magnesium fabric layer skin on a fiber mesh cloth layer of a lower layer to form the inorganic magnesium fabric layer.
As a further improvement of the invention: further comprising: 8) And (3) conveying the processed and molded inorganic magnesium fireproof plate consisting of the inorganic magnesium base material layer, the bottom fiber gridding cloth layer, the inorganic magnesium middle material layer, the surface fiber gridding cloth layer and the inorganic magnesium fabric layer to a curing frame, curing and curing for 4-8 hours at normal temperature, demolding, and curing for 5-7 days at normal temperature of 25-27 ℃.
The invention also provides calender equipment for preparing the dry-method formed A-grade inorganic magnesium fireproof plate, which comprises the following steps: the device comprises a main frame, a bottom material layer forming calender unit, a middle material layer forming calender unit, a fabric layer forming calender unit, a bottom fiber mesh cloth rack, a fabric layer fiber mesh cloth rack, a conveying belt and a driving motor, wherein the conveying belt is used for conveying a template and a material layer paved on the template, the driving motor is used for providing power for the bottom material layer forming calender unit, the middle material layer forming calender unit, the fabric layer forming calender unit and the conveying belt, the bottom fiber mesh cloth rack is arranged between the bottom material layer forming calender unit and the middle material layer forming calender unit, and the fabric layer fiber mesh cloth rack is arranged between the middle material layer forming calender unit and the fabric layer forming calender unit;
the structure of bed material layer shaping calender unit, well bed material layer shaping calender unit and precoat shaping calender unit is the same, all includes hopper, supplementary pay-off belt, first coarse pressure cylinder, the coarse pressure cylinder of second, first coining cylinder and second coining cylinder, supplementary pay-off belt is all installed to the both sides of hopper, supplementary pay-off belt's lower extreme and first coarse pressure cylinder butt, first coarse pressure cylinder, the coarse pressure cylinder of second, first coining cylinder and second coining cylinder are installed in proper order to the equal top-down in below both sides of hopper, all leave extrusion space and direction of rotation between the coarse pressure cylinder of the second of the first coarse pressure cylinder of both sides, the first coining cylinder of both sides and the second coining cylinder of both sides in opposite directions.
As a further improvement of the invention: first rough pressing cylinder, second rough pressing cylinder, first coining cylinder and second coining cylinder homogeneous end are connected with drive gear, and first rough pressing cylinder, second rough pressing cylinder, first coining cylinder and second coining cylinder are equipped with excessive gear between two liang in proper order, excessive gear is connected with the drive gear meshing, and the one end of the second coining cylinder that is at the lower extreme still is equipped with drive gear, drive gear passes through the chain and is connected with the transmission gear box, and the transmission gear box is connected with driving motor.
As a further improvement of the invention: the other ends of the first rough pressing roller, the second rough pressing roller, the first coining roller and the second coining roller are connected with auxiliary gears, the auxiliary gears are in meshed connection with driven gears, and the auxiliary gears at the same height are in meshed connection with the driven gears.
As a further improvement of the invention: bottom fibre net cloth holder and surface course fibre net cloth holder structure are the same, all include main shaft and guiding axle, the cover is equipped with fibre net cloth between main shaft and the guiding axle, and fibre net cloth slope sets up.
The invention also provides a dry-method-formed A-grade inorganic magnesium fireproof plate, which comprises an inorganic magnesium base material layer, a base fiber gridding cloth layer, an inorganic magnesium middle material layer, a surface fiber gridding cloth layer and an inorganic magnesium fabric layer in sequence, wherein the inorganic magnesium base material layer comprises:
the inorganic magnesium base material layer, the inorganic magnesium middle material layer and the inorganic magnesium surface material layer are all composed of the following materials by weight percent:
the bottom layer fiber gridding cloth layer and the surface layer fiber gridding cloth layer are both medium-alkali or alkali-free fiber gridding cloth.
As a further improvement of the invention: the light-burned magnesia powder is calcined at 780-820 ℃, the activity is 60-64%, the magnesium content is 80-85%, and the fineness mesh number of the product is 170-240 meshes.
As a further improvement of the invention: the aqueous adhesive may be one of vinyl acetate, polyvinyl acetate, acrylic acid, polyvinyl alcohol, polyurethane, epoxy resin, silicone, and rubber.
As a further improvement of the invention: the water-based tackifier is water-based rosin resin emulsion or water-based terpene emulsion.
As a further improvement of the invention: the coagulant is magnesium chloride hexahydrate or magnesium sulfate heptahydrate.
Compared with the prior art, the invention has the beneficial effects that:
the product of the invention adopts a dry method production forming process, all inorganic magnesium material layers are plastic non-sticky dry mud bulk materials, the whole forming process has no problem of polluting forming equipment and a template due to the adhesion of production materials, and the forming equipment is clean and does not need to be cleaned in the product forming process and after the forming is finished. The problems that in the wet pulp flow method production forming process, a large amount of clear water is used for randomly cleaning magnesium slurry pollutants adhered to equipment and a template in operation and cleaning production equipment after production is finished are solved, and therefore a large amount of polluted water and various chemical building material waste containing magnesium and the like cannot be directly discharged are solved, and the problems of environmental pollution harm and environmental protection treatment caused by the pollution are solved.
The product is formed by adopting a dry forming process and rolling by adopting forming calender equipment, and no excessive mixing water is needed in the preparation process of the product material. The product of the invention meets the requirement that the active magnesium oxide and the bauxite powder generate hydration reaction and are hardened under the action of the coagulant by the water-based adhesive, the water-based tackifier and the coagulant material with a small amount of water. The produced product can reach the qualified water content and deformation resistance after a short natural curing period. The water content of the product is not required to be corrected by a longer maintenance period or drying equipment, so that the production efficiency is improved, the production cost is reduced, a large amount of heat energy is saved, and the contribution to energy conservation and emission reduction advocated by the nation is made.
Drawings
Fig. 1 is a schematic structural view of a fire retardant panel in accordance with the present invention.
FIG. 2 is a schematic structural view of the calender apparatus of the present invention before molding.
FIG. 3 is a schematic view of the structure of the calender apparatus of the present invention after it is formed.
FIG. 4 is a schematic view of the forming calender unit of the present invention.
Detailed Description
To solve the technical problems in the prior art, the present invention will be further described with reference to the following description and embodiments in conjunction with the accompanying drawings:
the invention discloses a preparation method of a dry-method formed A-grade inorganic magnesium fireproof plate, which comprises the following preparation steps:
1) Weighing the water-based adhesive, the water-based tackifier, the surfactant and the retarder according to weight percentage, putting the materials into a reaction kettle with heating and stirring functions, starting stirring, heating to 85-95 ℃, stirring for reaction for 40-50 minutes, adding the coagulant weighed according to weight percentage, continuously stirring for reaction for 15-25 minutes, cooling to 25-35 ℃ after stirring, and discharging;
2) Pouring the material prepared in the step 1) into a kneader, pouring the light-burned magnesia powder, the alunite powder, the expanding agent, the alkaline regulator, the functional short fiber and the light filler into the kneader after being measured according to the weight percentage, kneading the materials together for 10 to 15 minutes to form a plastic non-stick dry mud bulk material for later use;
3) Placing the prepared plastic non-sticky dry sludge bulk material into a bottom material layer forming calender unit, calendering to obtain an inorganic magnesium bottom material layer skin with the thickness of 0.5-6MM after passing through a roller of the bottom material layer forming calender unit, and paving the inorganic magnesium bottom material layer skin on a template which moves synchronously below the inorganic magnesium bottom material layer skin to form an inorganic magnesium bottom material layer 1;
4) Moving the inorganic magnesium base material layer 1 formed on the template forwards to the lower part of a bottom fiber grid cloth frame, laying a layer of fiber grid cloth on the inorganic magnesium base material layer 1, and forming a bottom fiber grid cloth layer 2;
5) Moving the inorganic magnesium base material layer 1 and the bottom fiber mesh fabric layer 2 formed on the middle template in the step 4) forwards to the position below an inorganic magnesium middle material layer forming calender unit, putting the prepared plastic non-sticky dry mud bulk material into the middle material layer forming calender unit, calendering to form an inorganic magnesium middle material layer skin with the thickness of 1-50MM after passing through a roller of the middle material layer forming calender unit, and paving the inorganic magnesium middle material layer skin on the bottom fiber mesh fabric layer 2 to form an inorganic magnesium middle material layer 3;
6) The inorganic magnesium base material layer 1, the base fiber gridding cloth layer 2 and the inorganic magnesium intermediate material layer 3 which are formed on the template are moved forwards to the lower part of the surface fiber gridding cloth frame, and a layer of fiber gridding cloth is laid on the inorganic magnesium intermediate material layer 3 to form a surface fiber gridding cloth layer 4;
7) The inorganic magnesium base material layer 1, the base fiber gridding cloth layer 2, the inorganic magnesium middle material layer 3 and the surface fiber gridding cloth layer 4 which are formed by being laid on a template are moved forwards to the lower part of a surface material layer forming calender set, the prepared plastic non-sticky dry mud dough-shaped material is put into the surface material layer forming calender set, an inorganic magnesium surface material skin with the thickness of 0.5-6MM is calendered after passing through a roller of the surface material layer forming calender set, and is laid on the lower surface fiber gridding cloth layer 4 to form the inorganic magnesium surface material layer 5;
8) And (2) conveying the formed inorganic magnesium fireproof plate comprising the inorganic magnesium base material layer 1, the base fiber gridding cloth layer 2, the inorganic magnesium middle material layer 3, the surface fiber gridding cloth layer 4 and the inorganic magnesium surface material layer 5 to a maintenance frame, curing and curing for 4-8 hours at the normal temperature of 25-27 ℃, demoulding, curing for 5-7 days at the natural normal temperature of 25-27 ℃, and trimming at four sides and sanding with constant thickness on the plane.
As shown in fig. 2 to fig. 4, based on the same inventive concept, the present invention further provides a forming calender apparatus for preparing a dry-forming a-stage inorganic magnesium fireproof plate, which includes a main frame 20, a bottom material layer forming calender unit 1, a middle material layer forming calender unit 2, a fabric layer forming calender unit 3, a bottom fiber mesh cloth frame 4, a fabric layer fiber mesh cloth frame 5, a conveyor belt 17 and a driving motor 9, wherein the conveyor belt 17 is used for transporting a template and a material layer flatly laid on the template, the driving motor 9 is used for providing power for the bottom material layer forming calender unit 1, the middle material layer forming calender unit 2, the fabric layer forming calender unit 3 and the conveyor belt 17, and the main frame 20 is used for providing a fixed support apparatus.
The base material layer forming calender unit 1, the middle material layer forming calender unit 2 and the fabric layer forming calender unit 3 have the same structure and are collectively called forming calender units, and each forming calender unit comprises a hopper 101, an auxiliary feeding belt 102, a first rough pressing roller 103, a second rough pressing roller 104, a first fine pressing roller 105 and a second fine pressing roller 106, wherein the auxiliary feeding belt 102 is installed on two sides of the hopper 101, the lower end of the auxiliary feeding belt 102 is abutted to the first rough pressing roller 103, the first rough pressing roller 104, the first fine pressing roller 105 and the second fine pressing roller 106 are sequentially installed on two sides below the hopper 101 from top to bottom, extrusion spaces are reserved between the first rough pressing rollers 103 on two sides, the second rough pressing rollers 104 on two sides, the first fine pressing rollers 105 on two sides and the second fine pressing rollers 106 on two sides, and the rotation directions are opposite.
It should be noted that, according to the actual requirement of dry-forming a-grade inorganic magnesium fire-proof plate, the number of the first rough-pressing roller 103, the second rough-pressing roller 104, the first coining roller 105 and the second coining roller 106 is increased or decreased, and the arrangement of the first rough-pressing roller 103 or the first coining roller 105 is exemplarily decreased/increased.
The pressing spaces between the first rough-pressing rollers 103 on both sides, the second rough-pressing rollers 104 on both sides, the first finishing rollers 105 on both sides, and the second finishing rollers 106 on both sides decrease in order.
Preferably, one end of each of the first rough pressing roller 103, the second rough pressing roller 104, the first coining roller 105 and the second coining roller 106 is connected with a transmission gear 13, a transition gear 14 is arranged between each two of the first rough pressing roller 103, the second rough pressing roller 104, the first coining roller 105 and the second coining roller 106 in sequence, the transition gear 14 is meshed with the transmission gear 13, a driving gear 15 is further arranged at one end of the second coining roller 106 at the lower end, the driving gear 15 is connected with the first transmission gear box 10 through a chain, and the first transmission gear box 10 is connected with the driving motor 9.
More preferably, the other ends of the first rough pressing roller 103, the second rough pressing roller 104, the first coining roller 105 and the second coining roller 106 are connected with an auxiliary gear 21, the auxiliary gear 21 is engaged and connected with a driven gear 22, and the auxiliary gears 21 at the same height are engaged and connected through the driven gear 22.
The bottom layer fiber grid cloth rack 4 is arranged between the bottom material layer forming calender unit 1 and the middle material layer forming calender unit 2, and the surface layer fiber grid cloth rack 5 is arranged between the middle material layer forming calender unit 2 and the surface material layer forming calender unit 3.
Preferably, bottom fibre net cloth holder 4 and surface course fibre net cloth holder 5 structure are the same, all include main shaft 41 and guiding axle 42, the cover is equipped with fibre net cloth between main shaft 41 and the guiding axle 42, and the direction of rotation of main shaft 41 and guiding axle 42 is the same, and guiding axle 42 is close to conveyor belt 17, and the fibre net cloth layer slope setting on main shaft 41 and the guiding axle 42 is located to the cover, is convenient for fibre net cloth layer tile on the bed of material.
Preferably, a backing material layer repressing roller 6 is arranged between the backing material layer mesh cloth frame 4 and the middle material layer forming calender unit 2, a middle material layer repressing roller 7 is arranged between the surface layer mesh cloth frame 5 and the surface material layer forming calender unit 3, and a surface material layer repressing roller 8 is further arranged at the rear end of the surface material layer forming calender unit 3.
More preferably, the thickness adjusting devices 61 are mounted on the bottom material layer repressing roller 6, the middle material layer repressing roller 7 and the surface material layer repressing roller 8, and are used for adjusting the height of each repressing roller according to the material layer thickness on the template to carry out repressing.
The driving motor 9 is also used for providing power for the bottom material layer repressing roller 6, the middle material layer repressing roller 7 and the surface material layer repressing roller 8.
One end of the conveying belt 17 is provided with a driven roller 18, the other end of the conveying belt is provided with a driving roller 19, and the middle part of the conveying belt is also provided with a plurality of unpowered support rollers 16.
The position of the conveying belt 17, which is opposite to the bottom material layer repressing roller 6, the middle material layer repressing roller 7 and the fabric layer repressing roller 8, is also provided with a driving roller 19, one end of the driving roller 19 is connected with a driving gear 191, the driving gear 191 is connected with a second transmission gear box 11 through a chain, and the second transmission gear box 11 is connected with a driving motor 9.
More preferably, one end of the backing material layer double-pressing roller 6, the middle material layer double-pressing roller 7 and the fabric layer double-pressing roller 8 is connected with a double-pressing gear 62, the double-pressing gear 62 is connected with a first gear 63 in a meshing manner, one end of the driving roller 19 is also connected with a pressing gear 192, the pressing gear 192 is connected with a second gear 193 in a meshing manner, and the first gear 63 is connected with the second gear 193 in a meshing manner.
As shown in fig. 2, based on the same inventive concept, the invention further provides a dry-formed a-grade inorganic magnesium fireproof board, which is prepared by the preparation method of the dry-formed a-grade inorganic magnesium fireproof board and the forming calender equipment, and comprises an inorganic magnesium base material layer 1, a bottom fiber mesh fabric layer 2, an inorganic magnesium middle material layer 3, a surface fiber mesh fabric layer 4 and an inorganic magnesium fabric layer 5, wherein the inorganic magnesium base material layer 1, the bottom fiber mesh fabric layer 2, the inorganic magnesium middle material layer 3, the surface fiber mesh fabric layer 4 and the inorganic magnesium fabric layer 5 are sequentially formed, and the dry-formed a-grade inorganic magnesium fireproof board comprises:
the inorganic magnesium base material layer 1, the inorganic magnesium middle material layer 3 and the inorganic magnesium fabric layer 5 are the same in material composition and comprise the following materials in percentage by weight:
the bottom fiber gridding cloth layer 2 and the surface fiber gridding cloth layer 4 are made of the same material and are medium-alkali or alkali-free fiber gridding cloth with the same specification.
Preferably, the aqueous adhesive can be water-soluble adhesives such as vinyl acetate, polyvinyl acetate, acrylic acid, polyvinyl alcohol, polyurethane, epoxy resin, organic silicon, rubber and the like.
Preferably, the aqueous tackifier is a substance capable of enhancing the viscosity and cohesion of the aqueous adhesive, such as an aqueous rosin resin emulsion and an aqueous terpene emulsion.
Preferably, the surfactant is an anionic surfactant, a cationic surfactant, a nonionic surfactant, an amphoteric surfactant, a complex surfactant, or the like, such as a carboxylate surfactant, a sulfonate surfactant, a sulfate surfactant, a phosphate, or the like, which can change the surface tension of the material system.
Preferably, the retarder is one of organic and inorganic substances such as sodium gluconate, citric acid, sodium citrate, sodium tripolyphosphate, borax, boric acid and organic amine, and can delay or delay the reaction of the magnesium slurry and prolong the early-stage curing time, so that the requirement of substances capable of adjusting the production operation time is met.
Preferably, the coagulant is magnesium chloride hexahydrate, magnesium sulfate heptahydrate or the like which reacts with activated magnesium oxide to harden the same.
Preferably, the light-burned magnesia powder is prepared by high-temperature calcination at 780-820 ℃, has activity of 60-64%, magnesium content of 80-85% and product fineness of 170-240 meshes, and is active magnesia powder.
More preferably, the active magnesium oxide powder is special building material powder which is calcined at high temperature of about 800 ℃, has activity of 60-64%, magnesium content of 80-85% and fineness of about 200 meshes.
Preferably, the bauxite powder is an alumina-containing substance which is ground after being calcined at high temperature and can enhance the fire endurance and stability of the inorganic cementing material.
Preferably, the expanding agent is gypsum, and can be common building gypsum powder, dihydrate gypsum powder, phosphogypsum powder, desulfurized gypsum powder and the like, and can compensate product curing and later-stage drying shrinkage and maintain the physical dimension stability of the product.
Preferably, the alkaline regulator is ordinary portland cement or lime, and can increase the alkalinity of a product system and promote further hydration reaction of inorganic materials.
Preferably, the functional short fiber is polypropylene, polyester, polyvinyl alcohol short fiber and the like which can be melted and carbonized into an air pore network when the fire-resistant product is exposed to high temperature, so as to form a water vapor channel, reduce internal stress and prevent the product from bursting, thereby enhancing the fire resistance of the product.
Preferably, the light filler is bamboo, wood fiber powder, rice hull powder or other plant fiber powder, expanded perlite powder, polystyrene (EPS) foaming particles and the like.
The product of the invention adopts the aqueous adhesive and the composite aqueous tackifier, utilizes the surfactant to adjust the surface tension of the mixed material, generates the elastic gel material with high cohesive force, elastic modulus and plasticity and non-sticky material surface by reaction, and utilizes the elastic gel material to completely cover the active magnesium oxide, the coagulant, the alunite powder, the expanding agent, the alkaline regulator, the functional short fiber and the light filler to form the dry sludge bulk material with plasticity and non-stickiness. And forming the A-grade inorganic magnesium fireproof plate by a dry forming process.
Example 1
The dry-method-formed A-grade inorganic magnesium fireproof plate is prepared by adopting the preparation method and the forming calender equipment and comprises an inorganic magnesium base material layer 1, a bottom fiber gridding cloth layer 2, an inorganic magnesium middle material layer 3, a surface fiber gridding cloth layer 4 and an inorganic magnesium surface material layer 5 which are sequentially formed, wherein:
the inorganic magnesium base material layer 1, the inorganic magnesium middle material layer 3 and the inorganic magnesium fabric layer 5 are the same in composition and comprise the following materials in percentage by weight:
the bottom fiber mesh cloth layer 2 and the surface fiber mesh cloth layer 4 are made of the same material and are medium alkali fiber mesh cloth with the same specification.
The specific preparation steps are different from the steps 1) to 8) in that:
in step 1) described in this embodiment: starting the stirrer, heating to 90 ℃, 93 ℃ or 87 ℃, keeping the temperature, stirring for reacting for 45 minutes, adding 5) component materials, continuously stirring for reacting for 20 minutes, cooling to 30 ℃ after the reaction is finished, and discharging;
in step 3) described in this embodiment: after passing through a roller of a base material layer forming calender unit, calendering to form an inorganic magnesium base material layer skin with the thickness of 1MM, and paving the inorganic magnesium base material layer skin on a template which can synchronously move below the inorganic magnesium base material layer skin to form the inorganic magnesium base material layer 1;
in step 4) described in this embodiment: laying a layer of medium-alkali fiber gridding cloth on the inorganic magnesium base material layer 1 to form a base fiber gridding cloth layer 2;
in step 5) described in this embodiment: after passing through a roller of a middle material layer forming calender unit, calendering to obtain an inorganic magnesium middle material layer skin with the thickness of 8MM, and paving the inorganic magnesium middle material layer skin on the lower bottom fiber mesh cloth layer 2 to form an inorganic magnesium middle material layer 3;
in step 6) described in this embodiment: laying a layer of medium alkali fiber gridding cloth on the inorganic magnesium medium material layer 3 to form a surface layer fiber gridding cloth layer 4;
in step 7) of this embodiment: after passing through a roller of a fabric layer forming calender set, an inorganic magnesium fabric layer skin with the thickness of 1MM is calendered and is paved on the fiber mesh cloth layer 4 of the lower layer to form the inorganic magnesium fabric layer 5.
Comparative example 1
Comparative example 1 provides a wet-pulp inorganic magnesium fire protection panel and a process for forming the same, with example 1 as a control. Like this embodiment 1, the product structure composition also comprises an inorganic magnesium primer layer, a bottom glass fiber cloth layer, an inorganic magnesium middle material layer, a surface glass fiber cloth layer, and an inorganic magnesium fabric layer, and forms the wet pulp slurry process inorganic magnesium fire-proof board, wherein the inorganic magnesium primer layer, the inorganic magnesium middle material layer, and the inorganic magnesium fabric layer have the same composition, and are realized by comprising the following materials in percentage by weight:
the bottom fiber gridding cloth layer and the surface fiber gridding cloth layer are made of the same material and are medium-alkali or alkali-free fiber gridding cloth with the same specification.
The preparation method comprises the following specific steps:
the raw materials 1) and 4) are weighed according to the weight ratio and then put into a container to be mixed to form a magnesium chloride aqueous solution, the magnesium chloride aqueous solution and the rest raw material components 2), 3), 5) and 6) are sequentially added into a high-speed dispersion stirrer, the stirrer is started to disperse at high speed for 3-5 minutes and then uniformly mixed to form the inorganic magnesium base material layer thin slurry for later use. The preparation process of the inorganic magnesium middle material layer thin slurry and the inorganic magnesium fabric layer thin slurry is the same as that of the inorganic magnesium bottom material 1, and the prepared inorganic magnesium bottom material is ready for use.
And (2) paving a template on a leveling and rolling conveying line of wet pulp flow forming equipment, paving the prepared inorganic magnesium base material layer 1 thin slurry on the template, paving a layer of inorganic magnesium base material layer with the thickness of 1mm after passing through a base material layer thickness-adjustable roller, and synchronously paving a layer of medium alkali fiber mesh cloth on the inorganic magnesium base material layer to form the base fiber mesh cloth layer. And paving the prepared inorganic magnesium middle material layer thin slurry on the formed bottom fiber gridding cloth layer, paving a layer of inorganic magnesium thin slurry with the thickness of 8mm after passing through a middle material layer thickness-adjustable roller, forming the inorganic magnesium middle material layer, and synchronously paving a layer of middle alkali fiber gridding cloth on the inorganic magnesium middle material layer to form the surface fiber gridding cloth layer. The inorganic magnesium-based fireproof plate is characterized in that the prepared inorganic magnesium-based fabric layer thin slurry is paved on the formed middle layer fiber grid cloth layer, a layer of 1 mm-thick inorganic magnesium-based thin slurry is paved after a thickness-adjustable roller of the fabric layer, the inorganic magnesium-based fabric layer is shaped, the inorganic magnesium-based fireproof plate formed by the inorganic magnesium-based base material layer, the base layer fiber grid cloth layer, the inorganic magnesium-based middle material layer, the surface layer fiber grid cloth layer and the inorganic magnesium-based fabric layer is machined and molded and is conveyed to a curing frame, the inorganic magnesium-based fireproof plate is cured and cured at normal temperature for 8-12 hours and then is demoulded, and after natural normal temperature curing for 15-30 days, the inorganic magnesium-based fireproof plate is subjected to four-side cutting and plane fixed-thickness sanding to obtain the wet pulp flow method inorganic magnesium-based fireproof plate.
Example 2
The dry-method-formed A-grade inorganic magnesium fireproof plate is prepared by adopting the preparation method and the forming calender equipment and comprises an inorganic magnesium base material layer 1, a bottom fiber gridding cloth layer 2, an inorganic magnesium middle material layer 3, a surface fiber gridding cloth layer 4 and an inorganic magnesium surface material layer 5 which are sequentially formed, wherein:
the inorganic magnesium base material layer 1, the inorganic magnesium middle material layer 3 and the inorganic magnesium fabric layer 5 are the same in composition and comprise the following materials in percentage by weight:
the bottom fiber mesh cloth layer 2 and the surface fiber mesh cloth layer 4 are made of the same material and are medium alkali fiber mesh cloth with the same specification.
The specific preparation steps differ from example 1 in that:
in step 3) described in this embodiment: after passing through a roller of a primer layer forming calender unit, calendering to form an inorganic magnesium primer layer skin with the thickness of 1.5MM, and paving the inorganic magnesium primer layer skin on a template which can synchronously move below the inorganic magnesium primer layer skin to form the inorganic magnesium primer layer 1;
in step 5) described in this embodiment: after passing through a roller of a middle material layer forming calender unit, calendering to obtain an inorganic magnesium middle material layer skin with the thickness of 12MM, and paving the inorganic magnesium middle material layer skin on the lower bottom fiber mesh cloth layer 2 to form an inorganic magnesium middle material layer 3;
in step 7) of this embodiment: after passing through a roller of a fabric layer forming calender set, an inorganic magnesium fabric layer skin with the thickness of 1.5MM is calendered and is paved on the lower fiber gridding cloth layer 4 to form the inorganic magnesium fabric layer 5.
Example 3
The dry-method-formed A-grade inorganic magnesium fireproof plate is prepared by adopting the preparation method and the forming calender equipment and comprises an inorganic magnesium base material layer 1, a bottom fiber gridding cloth layer 2, an inorganic magnesium middle material layer 3, a surface fiber gridding cloth layer 4 and an inorganic magnesium surface material layer 5 which are sequentially formed, wherein:
the inorganic magnesium base material layer 1, the inorganic magnesium middle material layer 3 and the inorganic magnesium fabric layer 5 are the same in composition and comprise the following materials in percentage by weight:
the bottom fiber mesh cloth layer 2 and the surface fiber mesh cloth layer 4 are made of the same material and are medium alkali fiber mesh cloth with the same specification.
The specific preparation steps differ from those of example 1):
in step 5) described in this embodiment: after passing through a roller of a middle material layer forming calender set, an inorganic magnesium middle material layer skin with the thickness of 6MM is calendered and is paved on a lower bottom fiber gridding cloth layer 2 to form the inorganic magnesium middle material layer 3.
Comparative example 2
Comparative example 2 example 3 was used as a control. The following are comparative example 2 inorganic magnesian fireproofing board by wet pulp flow method and the forming process thereof. The product structure composition is the same as the invention, and also comprises an inorganic magnesium base material layer, a bottom glass fiber cloth layer, an inorganic magnesium middle material layer, a surface glass fiber cloth layer and an inorganic magnesium fabric layer. The wet pulp flow method inorganic magnesium fireproof plate is formed, wherein the inorganic magnesium bottom stock layer, the inorganic magnesium middle material layer and the inorganic magnesium fabric layer are the same in material composition and are all formed by the following materials in percentage by weight:
the bottom fiber mesh cloth layer and the surface fiber mesh cloth layer are made of the same material and are medium-alkali or alkali-free fiber mesh cloth with the same specification.
Description of specific operation steps:
the raw materials 1) and 4) are weighed according to the weight ratio and put into a container to be mixed to form the magnesium chloride aqueous solution. Adding the magnesium chloride aqueous solution and the rest raw material components 2), 3), 5) and 6) into a high-speed dispersion stirrer in sequence, starting the stirrer to disperse at high speed for 3-5 minutes, and uniformly mixing to form the inorganic magnesium bottom material layer slurry for later use. The preparation process of the inorganic magnesium middle material layer thin slurry and the inorganic magnesium surface material layer thin slurry is the same as that of the inorganic magnesium bottom material thin slurry, and the prepared inorganic magnesium bottom material thin slurry is ready for use.
And (2) paving a template on a leveling and rolling conveying line of wet pulp flow forming equipment, paving the prepared inorganic magnesium base material layer thin slurry on the template, paving a layer of inorganic magnesium base material layer with the thickness of 1mm after passing through a base material layer thickness-adjustable roller, and synchronously paving a layer of medium alkali fiber mesh cloth on the inorganic magnesium base material layer to form the base fiber mesh cloth layer. And paving the prepared inorganic magnesium middle material layer thin slurry on the formed bottom fiber gridding cloth layer, paving a layer of inorganic magnesium thin slurry with the thickness of 6mm after passing through a middle material layer thickness-adjustable roller, forming the inorganic magnesium middle material layer, and synchronously paving a layer of middle alkali fiber gridding cloth on the inorganic magnesium middle material layer to form the surface fiber gridding cloth layer. The inorganic magnesian precoat thin slurry is well prepared, is spread on the formed middle layer fiber gridding cloth layer, and is subjected to thickness-adjustable roller through the precoat to form a layer of inorganic magnesian thin slurry with the thickness of 1mm, the inorganic magnesian precoat is shaped, the inorganic magnesian fireproof plate formed by the inorganic magnesian base material layer, the base layer fiber gridding cloth layer, the inorganic magnesian middle material layer, the surface layer fiber gridding cloth layer and the inorganic magnesian precoat is conveyed to a curing frame, is cured and cured at normal temperature for 8-12 hours and then is demoulded, and is naturally cured at normal temperature for 15-30 days, and then subjected to four-side edge cutting and plane fixed-thickness sanding to obtain the wet pulp flow method inorganic magnesian fireproof plate.
Example 4
The dry-method-formed A-grade inorganic magnesium fireproof plate is prepared by adopting the preparation method and the forming calender equipment and comprises an inorganic magnesium base material layer 1, a bottom fiber gridding cloth layer 2, an inorganic magnesium middle material layer 3, a surface fiber gridding cloth layer 4 and an inorganic magnesium surface material layer 5 which are sequentially formed, wherein:
the inorganic magnesium base material layer 1 and the inorganic magnesium fabric layer 5 have the same material composition, and are respectively composed of the following materials in percentage by weight:
the inorganic magnesium middle material layer 3 is composed of the following materials in percentage by weight:
the bottom fiber gridding cloth layer 2 and the surface fiber gridding cloth layer 4 are made of the same material and are medium-alkali fiber gridding cloth with the same specification.
The specific preparation steps differ from example 1 in that:
in step 3) described in this embodiment: after passing through a roller of a primer layer forming calender unit, calendering to obtain an inorganic magnesium primer layer skin with the thickness of 6MM, and paving the inorganic magnesium primer layer skin on a template which can synchronously move below the inorganic magnesium primer layer skin to form the inorganic magnesium primer layer 1;
in step 5) described in this embodiment: after passing through a roller of a middle material layer forming calender unit, calendering to obtain an inorganic magnesium middle material layer skin with the thickness of 38MM, and paving the inorganic magnesium middle material layer skin on the lower bottom fiber mesh fabric layer 2 to form an inorganic magnesium middle material layer 3;
in step 7) of this embodiment: after passing through a roller of a fabric layer forming calender set, an inorganic magnesium fabric layer skin with the thickness of 6MM is calendered and is paved on the fiber mesh cloth layer 4 of the lower layer to form the inorganic magnesium fabric layer 5.
The dry-formed grade a inorganic magnesium fire proof plate prepared in the above examples 1 to 5 and the wet pulp slurry-formed inorganic magnesium fire proof plate prepared in the comparative examples 1 and 2 were tested by the following standards according to different forming process modes, and the results obtained are as follows in table 1:
TABLE 1
As can be seen from table 1, according to the results of the relevant detection standards and the obtained relevant data, the inorganic magnesium fire-proof boards prepared in the embodiments 1 to 4 of the present invention satisfy the characteristics of inorganic environmental protection, high strength, deformation resistance, low moisture content, reaching a-level fire-proof performance and short natural curing period, while the inorganic magnesium fire-proof boards prepared in the comparative examples 1 and 2 by using the wet pulp flow forming process have the advantages that the natural curing time required for reaching the qualified moisture content is prolonged by 3 to 4 times, and the products are easy to deform.
The inorganic magnesium fireproof plate prepared by the invention has the advantages of short product maintenance period, stronger mechanical property and physical property, better low water content, deformation resistance and the like. Meanwhile, the environmental pollution harm and the environmental protection treatment problem caused by the traditional manufacturing process are avoided, a large amount of heat energy is saved, and the advantages of contributing to energy conservation and emission reduction advocated by the nation and the like are achieved.
The foregoing are merely exemplary embodiments of the present invention to enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A preparation method of a dry-method-formed A-grade inorganic magnesium fireproof plate is characterized by comprising the following preparation steps:
1) After the aqueous adhesive, the aqueous tackifier, the surfactant and the retarder are measured according to the weight percentage, putting the aqueous adhesive, the aqueous tackifier, the surfactant and the retarder into a reaction kettle, heating the aqueous adhesive, the aqueous tackifier, the surfactant and the retarder to 85-95 ℃, stirring the aqueous adhesive, the aqueous tackifier, the surfactant and the retarder to react for 40-50 minutes, adding the coagulant which is measured according to the weight percentage, continuously stirring the aqueous adhesive and the retarder to react for 15-25 minutes, cooling the aqueous adhesive, the aqueous tackifier, the surfactant and the retarder to 25-35 ℃ after the stirring is finished, and discharging the aqueous adhesive;
2) Pouring the material prepared in the step 1) into a kneader, pouring the light-burned magnesia powder, the alunite powder, the expanding agent, the alkaline regulator, the functional short fiber and the light filler into the kneader after being measured according to the weight percentage, kneading the materials together for 10 to 15 minutes to form a plastic non-stick dry mud bulk material for later use;
3) Placing the prepared plastic non-sticky dry sludge bulk material into a bottom material layer forming calender unit, calendering to obtain an inorganic magnesium bottom material layer skin with the thickness of 0.5-6MM after passing through a roller of the bottom material layer forming calender unit, and paving the inorganic magnesium bottom material layer skin on a template which moves synchronously below the inorganic magnesium bottom material layer to form the inorganic magnesium bottom material layer;
4) Moving the template in the step 3) forward to the lower part of a bottom fiber grid cloth frame, and laying a layer of fiber grid cloth on the inorganic magnesium substrate layer to form a bottom fiber grid cloth layer;
5) Moving the template in the step 4) forward to the position below an inorganic magnesium intermediate material layer forming calender unit, putting the prepared plastic non-sticky dry mud bulk material into the intermediate material layer forming calender unit, calendering to form an inorganic magnesium intermediate material layer skin with the thickness of 1-50MM after passing through a roller of the intermediate material layer forming calender unit, and flatly paving the inorganic magnesium intermediate material layer on a bottom fiber mesh fabric layer below to form the inorganic magnesium intermediate material layer;
6) Moving the template in the step 5) forward to the lower part of a surface layer fiber grid cloth frame, and laying a layer of fiber grid cloth on the inorganic magnesium middle material layer to form a surface layer fiber grid cloth layer;
7) Moving the template in the step 6) forward to the position below a fabric layer forming calender unit, putting the prepared plastic non-sticky dry mud bulk material into the fabric layer forming calender unit, calendering to obtain an inorganic magnesium fabric layer skin with the thickness of 0.5-6MM after passing through a roller of the fabric layer forming calender unit, and flatly paving the inorganic magnesium fabric layer skin on a fiber gridding cloth layer of a lower layer to form the inorganic magnesium fabric layer.
2. The method for manufacturing a dry-formed grade a inorganic magnesium fire shield according to claim 1, further comprising:
8) And (3) conveying the processed and molded inorganic magnesium fireproof plate consisting of the inorganic magnesium base material layer, the bottom fiber gridding cloth layer, the inorganic magnesium middle material layer, the surface fiber gridding cloth layer and the inorganic magnesium fabric layer to a curing frame, curing and curing for 4-8 hours at normal temperature, demolding, and curing for 5-7 days at normal temperature of 25-27 ℃.
3. A calender apparatus for producing a dry-formed grade A inorganic magnesium fire-proof board, comprising: the device comprises a main frame, a bottom material layer forming calender unit, a middle material layer forming calender unit, a fabric layer forming calender unit, a bottom fiber mesh cloth rack, a fabric layer fiber mesh cloth rack, a conveying belt and a driving motor, wherein the conveying belt is used for conveying a template and a material layer paved on the template, the driving motor is used for providing power for the bottom material layer forming calender unit, the middle material layer forming calender unit, the fabric layer forming calender unit and the conveying belt, the bottom fiber mesh cloth rack is arranged between the bottom material layer forming calender unit and the middle material layer forming calender unit, and the fabric layer fiber mesh cloth rack is arranged between the middle material layer forming calender unit and the fabric layer forming calender unit;
the structure of bed material layer shaping calender unit, well bed material layer shaping calender unit and precoat shaping calender unit is the same, all includes hopper, supplementary pay-off belt, first heavy pressure cylinder, second heavy pressure cylinder, first coining cylinder and second coining cylinder, supplementary pay-off belt is all installed to the both sides of hopper, the lower extreme and the first heavy pressure cylinder butt of supplementary pay-off belt, first heavy pressure cylinder, second heavy pressure cylinder, first coining cylinder and second coining cylinder are installed in proper order to the equal top-down in below both sides of hopper, all leave extrusion space and direction of rotation between the first heavy pressure cylinder of both sides, the second heavy pressure cylinder of both sides, the first coining cylinder of both sides and the second coining cylinder of both sides in opposite directions.
4. The calender equipment for preparing the grade A inorganic magnesium fireproof plate by the dry forming method according to claim 3, wherein the first rough pressing roller, the second rough pressing roller, the first fine pressing roller and the second fine pressing roller are connected with a transmission gear at one end, a transition gear is arranged between every two of the first rough pressing roller, the second rough pressing roller, the first fine pressing roller and the second fine pressing roller in sequence, the transition gear is meshed with the transmission gear, a driving gear is further arranged at one end of the second fine pressing roller at the lower end, the driving gear is connected with a transmission gear box through a chain, and the transmission gear box is connected with a driving motor.
5. The calender equipment for preparing the dry-forming A-grade inorganic magnesium fireproof plate according to claim 3, wherein the other ends of the first rough pressing roller, the second rough pressing roller, the first coining roller and the second coining roller are connected with auxiliary gears, the auxiliary gears are in meshed connection with driven gears, and the auxiliary gears at the same height are in meshed connection through the driven gears.
6. The calender equipment for preparing the dry-forming A-grade inorganic magnesium fireproof plate according to claim 3, wherein the bottom layer fiber mesh cloth frame and the surface layer fiber mesh cloth frame have the same structure and comprise a main shaft and a guide shaft, fiber mesh cloth is sleeved between the main shaft and the guide shaft, and the fiber mesh cloth is obliquely arranged.
7. The utility model provides a dry process shaping A level inorganic magnesium PLASTIC LAMINATED, its characterized in that, material layer, surface course fibre net cloth layer, inorganic magnesium precoat constitute in proper order in inorganic magnesium bed course, bottom fibre net cloth layer, the inorganic magnesium, wherein:
the inorganic magnesium base material layer, the inorganic magnesium middle material layer and the inorganic magnesium fabric layer are all composed of the following materials in percentage by weight:
the bottom layer fiber gridding cloth layer and the surface layer fiber gridding cloth layer are both medium-alkali or alkali-free fiber gridding cloth.
8. The dry-formed grade-A inorganic magnesium fire-proof plate according to claim 7, wherein the light-burned magnesia powder is calcined at 780-820 ℃, the activity is 60-64%, the magnesium content is 80-85%, and the fineness mesh number of the product is 170-240 meshes.
9. The dry-formed grade a inorganic magnesium fire shield according to claim 7, wherein the aqueous adhesive is one of vinyl acetate, polyvinyl acetate, acrylic acid, polyvinyl alcohol, polyurethane, epoxy resin, silicone, and rubber.
10. The dry-formed grade A inorganic magnesium fire proof plate according to claim 7, wherein the aqueous tackifier is an aqueous rosin resin emulsion or an aqueous terpene emulsion. The coagulant is magnesium chloride hexahydrate or magnesium sulfate heptahydrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211504074.XA CN115872712A (en) | 2022-11-29 | 2022-11-29 | Dry-process-molded A-grade inorganic magnesium fireproof plate, preparation method and calender equipment |
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| CN202211504074.XA CN115872712A (en) | 2022-11-29 | 2022-11-29 | Dry-process-molded A-grade inorganic magnesium fireproof plate, preparation method and calender equipment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2657897Y (en) * | 2003-10-17 | 2004-11-24 | 姚明起 | Compound forming device of light composite board |
| CN2707875Y (en) * | 2004-04-03 | 2005-07-06 | 付志洪 | Double-magnesium, fiberglass mesh and bamboo fiber composite board |
| CN108394058A (en) * | 2018-04-09 | 2018-08-14 | 佛山市广意永雄机械有限公司 | A kind of equipment of the wood plastic template in use for architecture of manufacture easy mold release |
| CN114012857A (en) * | 2021-10-15 | 2022-02-08 | 廊坊民丰木业有限公司 | Preparation method of high-performance magnesium-based inorganic flame-retardant shaving board |
-
2022
- 2022-11-29 CN CN202211504074.XA patent/CN115872712A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2657897Y (en) * | 2003-10-17 | 2004-11-24 | 姚明起 | Compound forming device of light composite board |
| CN2707875Y (en) * | 2004-04-03 | 2005-07-06 | 付志洪 | Double-magnesium, fiberglass mesh and bamboo fiber composite board |
| CN108394058A (en) * | 2018-04-09 | 2018-08-14 | 佛山市广意永雄机械有限公司 | A kind of equipment of the wood plastic template in use for architecture of manufacture easy mold release |
| CN114012857A (en) * | 2021-10-15 | 2022-02-08 | 廊坊民丰木业有限公司 | Preparation method of high-performance magnesium-based inorganic flame-retardant shaving board |
Non-Patent Citations (1)
| Title |
|---|
| 中国菱镁行业协会组编: ""镁质胶凝材料及制品技术"", vol. 1, 中国菱镁行业协会组编, pages: 186 - 144 * |
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