Momwe mungasankhire hydroxypropyl methylcellulose pamatope a pulasitala?

Mtengo wa pH wazinthu za gypsum ndi acidic kapena ndale. Tsopano pali mitundu iwiri ya kalasi yomangahydroxypropyl methylcellulosePamsika: cellulose wosungunuka pang'onopang'ono ndi cellulose nthawi yomweyo (S). Instant cellulose siyoyenera machitidwe a gypsum. Zogulitsa, zosungunulira zimakhala zochepa kwambiri pansi pa acidic kapena ndale, ndipo hydroxypropyl methylcellulose yosungunuka pang'onopang'ono imatha kusungunuka muzinthu za gypsum, koma ma cellulose omwe amasungunuka pang'onopang'ono ali ndi vuto lalikulu, n'zosavuta kuti agglomerate (pamene gypsum Pambuyo matope akugwedezeka pakhoma kwa kanthawi kochepa, kuti awoneke pamwamba pa madontho ochepa). Pakali pano, mu mankhwala a gypsum, makamaka mu matope a gypsum opopera pamakina, pamafunika kuti mapadi a cellulose akhoza kumwazikana ndi kusungunuka mu nthawi yochepa kwambiri, zomwe zimafuna kuti tizichita kafukufuku wozama pa ndondomeko yopanga mapadi a cellulose ether. mankhwala pamwamba (osati otchedwa kuwonjezera zina zina mu wamba kalasi mapadi efa), kuti azolowere dongosolo gypsum matope. Hydroxypropyl methylcellulose ether yokhala ndi chithandizo chakuya pamtunda imatha kukhala ndi nthawi yokhazikika yosungunuka komanso zinthu zabwino zamakina mumatope a gypsum, ndipo zimatha kusintha kwambiri kusanja ndi kutsiriza kwa matope.

Makina opopera matope a gypsum nthawi zambiri amagwiritsa ntchito hydroxypropyl methylcellulose ether yotsika kwambiri pakati pa 20,000 ndi 75,000, ndipo kuchuluka kwake kumakhala 0.2% mpaka 0.4%. Nthawi yoyika makina opopera matope a gypsum imayendetsedwa pafupifupi ola limodzi. Timagwiritsa ntchito gypsum matope zokolola nkhawa, pulasitiki mamasukidwe akayendedwe, thixotropy, rheology ndi kusasinthasintha slurry kuweruza ntchito gypsum matope mankhwala.

Timaganizira khalidwe kulamulira desulfurization gypsum gwero calcining ndondomeko, fillers (simenti, fine aggregate, heavy kashiamu ufa) ndi admixtures (angagwiritsidwe ntchito kumwazikana latex ufa, hydroxypropyl methyl cellulose efa, kukod perlite, gypsum retarder) Kusankha lonse mankhwala chilinganizo mtengo mtengo.

Hydroxypropyl methyl cellulose etherchifukwa matope a gypsum amakhala oyeretsedwa kwambiri komanso amatha kugwira ntchito bwino, ndipo amayamikiridwa kwambiri ndi makasitomala amtundu wa gypsum.