Indlela yangemuva
Impushana yerabha ehlukanisekayo iyimpushana emhlophe eqinile ecutshungulwa ngokufafazwa nokomiswa kwe-latex ekhethekile. Isetshenziswa kakhulu njengesengezo esibalulekile "sodaka lwemiksi eyinkulungwane" kanye nezinye izithasiselo zodaka oluxubene ezomile zezinto zokwakha zobunjiniyela bodonga lwangaphandle. . I-latex powder ye-refractory evame ukusetshenziswa iyi-copolymer ye-vinyl acetate, okuyi-powder emhlophe engakwazi ukuslayida ngokukhululekile futhi ingahlakazeka kahle emanzini ukuze yakhe i-emulsion ezinzile ngokusebenza okufanayo njenge-latex yasekuqaleni. Njengesengezo esibalulekile emikhiqizweni yodaka oluxutshwe okomile, impushana ye-latex ehlakazeka kabusha idlala indima ebalulekile odakeni oluxutshwe usimende. Ingathuthukisa amandla esibopho nokuhlangana kwezinto. Thuthukisa amandla okugoba okunwebeka namandla okuguquguquka kwezinto. Thuthukisa ukumelana nokuncibilika kweqhwa kwento. Thuthukisa ukumelana nesimo sezulu, ukuqina, ukumelana nokugqoka kwezinto. Thuthukisa i-hydrophobicity yezinto futhi unciphise ukumuncwa kwamanzi. Thuthukisa ukusebenza futhi unciphise ukuncipha kwezinto. Ingavimbela ngempumelelo ukuqhekeka. (I) Thuthukisa amandla okubopha nokubumbana
Emikhiqizweni yodaka lukasimende owomile, kudingekile kakhulu ukwengeza impushana yerabha ehlakazeka kabusha. Kusobala kakhulu ukuthuthukisa amandla okubopha nokuhlangana kwezinto. Lokhu kubangelwa ukungena kwezinhlayiya ze-polymer kuma-pores kanye nama-capillaries we-matrix ye-cement, kanye nomphumela wamandla amahle ahlangene ngemva kokufakwa kwe-hydration ne-cement. Ngenxa yokunamathela okuhle kakhulu kwe-polymer resin ngokwayo, ingathuthukisa ukunamathela kwemikhiqizo yodaka lukasimende kuma-substrates, ikakhulukazi ukuhlangana kwezibophezelo ze-inorganic ezifana usimende kuma-substrates e-organic njengokhuni, i-fiber, i-PWC, ne-PS. Ukwenziwa ngcono kokusebenza kabi kunomphumela osobala kakhulu.
Ukugoba okuthuthukisiwe nokumelana nokuqina
Kuhlaka lwamathambo oluqinile olwakhiwe ngemva kokuba udaka lukasimende lufakwe amanzi, ifilimu ye-polymer iyanwebeka futhi iqinile, futhi yenza njengehlangano ehambayo phakathi kwezinhlayiya zodaka lukasimende, ezingamelana nemithwalo ephezulu yokuguquguquka futhi inciphise ukucindezeleka. Ukumelana nokugoba okuthuthukisiwe
Thuthukisa ukumelana nomthelela
I-latex powder ehlakazeka kabusha iyinhlaka ye-thermoplastic. Ifilimu ethambile embozwe phezu kwezinhlayiya zodaka ingakwazi ukumunca umthelela wamandla angaphandle futhi iphumule ngaphandle kokuphuka, ngaleyo ndlela ithuthukise ukumelana komthelela wodaka.
Thuthukisa i-hydrophobicity futhi unciphise ukumuncwa kwamanzi
Ukwengeza i-latex powder ehlakazeka kabusha kungathuthukisa i-microstructure yodaka lukasimende. I-polymer yayo yakha inethiwekhi engenakuhlehliswa ngesikhathi senqubo ye-cement hydration, ivala i-capillary kujeli kasimende, ivimbele ukumuncwa kwamanzi, ivimbele ukungena kwamanzi, futhi ithuthukise ukungakwazi ukungena.
Thuthukisa ukumelana nokugqoka kanye nokuqina
Ukwengeza impushana yerabha ehlakazeka kabusha kungakhuphula ukuhlangana phakathi kwezinhlayiya zodaka lukasimende nefilimu ye-polymer. Ukuthuthukiswa kwamandla ahlangene ngokuhambisanayo kuthuthukisa ikhono lodaka ukuze limelane nengcindezi yokugunda, kunciphisa izinga lokuguga, kuthuthukisa ukumelana nokuguga, futhi kwandise impilo yesevisi yodaka.
Thuthukisa ukuzinza kweqhwa futhi uvimbele ngempumelelo ukuqhekeka kwempahla
Impushana ye-latex ehlakazeka kabusha, umphumela wepulasitiki we-resin yayo ye-thermoplastic unganqoba umonakalo odalwe ukwanda okushisayo kanye nokufinyela kwempahla yodaka lukasimende okubangelwa ukushintsha komehluko wokushisa. Ukunqoba ukushiyeka kodaka olulula lukasimende, njengokushwabana okukhulu okomile nokuqhekeka kalula, kungenza izinto eziguquguqukayo zibe lula, ngaleyo ndlela kuthuthukiswe ukuzinza kwesikhathi eside kwezinto. Kodwa-ke, kunezinkinga ezithile enqubweni yokukhiqiza i-latex powder ehlakazeka kabusha kubuciko bangaphambili, okuholela ekutheni izinhlayiya ze-latex azifani futhi zilungile ngokwanele, futhi i-agglomeration ijwayele ukwenzeka ngesikhathi sokukhiqiza, ukuthutha nokugcinwa. Ngaleyo ndlela ithinta umphumela wokusetshenziswa kwayo.
Le nqubo ingabonakala ngokusebenzisa izixazululo zobuchwepheshe ezilandelayo: inqubo yokukhiqiza kabusha i-latex powder ehlakazekile emuva, izinto ezilandelayo zakhiwe ngokuvumelana nephesenti lesisindo esinamathiselwe se-polymer emulsion 72-85%; i-colloid yokuzivikela 4-9%; i-ejenti yokukhulula i-11 -15%; izithasiselo ezisebenzayo 0-5%; ekhiqizwa yinqubo elandelayo
a, ukulungiswa kwe-colloid evikelayo: kuketela lokuphendula, i-colloid powder evikelayo yenani le-batching ayixutshwa namanzi futhi iyashisiswa ukuze iguqulwe ibe yiglue, futhi i-defoamer iyengezwa, ifudunyezwe futhi igcinwe ifudumele ukuze yakhe i-colloid ebonakalayo evikelayo. , ukuze i-viscosity ifinyelele ku-2500as, eqinile Okuqukethwe kufinyelela ku-19.5-20.5%.
b. Ukulungiswa kokuhlakazeka: faka i-colloid yokuvikela elungiselelwe kugedlela lokulungiselela, bese ufaka i-emulsion ye-polymer yenani le-batching, uhlanganise ngokulinganayo, bese wengeza i-defoamer bese wengeza amanzi ukulungisa i-viscosity ku-70-200Mas, futhi okuqukethwe okuqinile kufinyelela ku-39% - 42%, ukufudumala ku-50-55 °
C, ukusetshenziswa;
C, ukomiswa kwesifutho samafu: vula umbhoshongo wokomisa isifutho samafu, lapho izinga lokushisa lendawo yokuphakelayo ephezulu yombhoshongo wokomisa ifu lesifutho lishisiswe lifinyelela ku-140-150 DEG C, ukuhlakazwa okulungisiwe kulethwa endaweni yokuphakela. phezulu kombhoshongo wokumisa isifutho ngepompo yesikulufu. Embobeni yokuphakelayo, uketshezi oluhlakazekayo lwenziwa i-athomu lube amaconsi amancane anobubanzi beconsi obungama-microns angu-10-100 ngediski ye-atomization ye-centrifugal enesivinini esikhulu embobeni yokuphakelayo. Ngesikhathi esifanayo, ama-micro-droplets ashiswa ngokushesha nge-air-high-temperature, futhi ngesikhathi esifanayo, i-ejenti yokukhululwa yengezwa ekuphumeni komoya okuphezulu. , lapho amaconsi amancane eshiselwa ukuze akhiqize i-viscosity, i-ejenti yokukhulula inamathela kumaconsi amancane ngesikhathi, bese amanzi kumaconsi amancane ahwamuka ngokushesha ukuze ome ngokugeleza komoya okuphezulu ukuze kwakheke igesi- ingxube eqinile;
d, ukupholisa nokuhlukanisa: gcina izinga lokushisa lomoya we-spray drying tower ku-79°C-81°C, futhi ingxube eqinile yegesi ithunyelwa ngokushesha isuka endaweni yokukhipha umoya ngaphansi kombhoshongo wokomisa isifutho. , bese ingeniswe kusihlungi sesikhwama esikhulu ngemva kokupholisa. Impushana ekugelezeni komoya iyahlukaniswa futhi impushana ehlukanisiwe ihlukaniswa futhi ihlungwe ukuze kutholwe umkhiqizo oqediwe wempushana ye-latex ehlakazekile kabusha. Izifanekiso Eziqondile Faka inani elithile lamanzi ahlanzekile ngokulingana ne-reactor ehlanzekile, nyusa izinga lokushisa libe ngu-50°C, vula indlela enyakazayo, engeza i-colloid powder evikelayo ngokuvumelana no-25% yenani lamanzi angezwe ku-reactor, futhi inqubo yokwengeza kufanele ihambe kancane Yengeze ukuvimbela impushana ukuthi ingahlangani emanzini. Ungayengezi odongeni oluseceleni lwe-reactor. Ngemva kokuqedwa kokwengeza, engeza i-defoamer elingana no-1% yenani lonke. Kunconywa ukusebenzisa i-silicone-based defoamer. Vala imbobo yokuphakela bese ushisa kufika ku-95°C. Ifakwe ihora elingu-1, uketshezi oluku-reactor luzokwakhiwa lube ingcina ye-viscous ebonakalayo, ngaphandle kwezinhlayiya ezimhlophe, isampula, i-viscosity yokuhlola nokuqukethwe okuqinile, okudinga i-viscosity ukuthi ifinyelele cishe ku-2500as, nokuqukethwe okuqinile ukufinyelela ku-19.5-20.5%. Faka i-colloid eyisivikelo elungisiwe kugedlela lokuxuba, bese wengeza i-emulsion ye-polymer ngokulingana, hlanganisa i-colloid evikelayo ne-emulsion ngokulinganayo, bese wengeza i-defoamer ngendlela efanele, ngokuvamile elingana cishe no-0.1% yenani eliphelele, futhi i-defoamer kufanele isetshenziswe wena Emulsified abicah isibulala magciwane
I-ejenti enegwebu, bese wengeza amanzi ukuze ulungise i-viscosity ibe ngu-70-200pas, kanye nokuqukethwe okuqinile ku-39% -42%. Khulisa izinga lokushisa libe ngu-5055C. Ukuhlolwa kwesampula, kulungele ukusetshenziswa.
Amanzi emathonsi azomiswa ngokushesha ngokugeleza komoya okuphezulu, bese ingxube eqinile yegesi izokhishwa ngokushesha embhoshongweni wokomisa, igcine izinga lokushisa lomoya endaweni yokuphuma komoya ephansi yemishini yokomisa. 79 ° C -81 ° Co. Ingxube eqinile yegesi iholwa emshinini wokomisa Ngemva kokushiya, engeza umoya owomile ongu-5°C ongasekho ukuze uphole, futhi ukugeleza komoya okuqukethe impushana kungeniswa kusihlungi sesikhwama esikhulu, bese kuthi impushana ingene. ukugeleza komoya kuhlukaniswa ngezindlela ezimbili zokuhlukanisa isishingishane kanye nokuhlukaniswa kokuhlunga. , Impushana ehlukanisiwe ihlukaniswa futhi ihlungwe ukuze kutholwe iziqhingi ze-latex powder ezihlakazeka kabusha.
Thutha i-1,000 kg ye-dispersion liquid enokuqukethwe okuqinile okungama-42% embhoshongweni wokomisa ngengcindezi ethile, bese wengeza u-51 kg we-ejenti yokukhulula ngokwendlela engenhla ngesikhathi esifanayo, yome ngokufafaza futhi uhlukanise okuqinile negesi, futhi uthole. impushana ephumayo engu-461 kg enobunono obufanele.
Isikhathi sokuthumela: Feb-27-2023