I-aluminium sulfate(eyaziwa nangokuthi i-alum noma i-bauxite) ivamise ukusetshenziswa njenge-precipitant yokulinganisa.Ukwakheka kwayo kwamakhemikhali okuyinhloko yi-aluminium sulfate enamanzi ayi-crystal ayi-14 ~ 18, futhi okuqukethwe kwe-Al2O3 yi-14 ~ 15%.I-Aluminium sulfate kulula ukuyincibilika, futhi isisombululo sayo sine-asidi futhi siyagqwala.Ukungcola okuqukethwe ku-bauxite akufanele kube kuningi, ikakhulukazi usawoti wensimbi akufanele ube phezulu kakhulu, ngaphandle kwalokho uzosabela ngamakhemikhali nge-rosin gum namadayi, okuthinta umbala wephepha.
Izinga lekhwalithi yokulinganisa i-bauxite yile: okuqukethwe kwe-alumina kungaphezu kuka-15.7%, okuqukethwe kwe-iron oxide kungaphansi kuka-0.7%, okuqukethwe kwamanzi okungancibiliki kungaphansi kuka-0.3%, futhi ayinayo i-asidi ye-sulfuric yamahhala.
I-Bauxite idlala indima enkulu ekwenzeni iphepha, okokuqala nje isidingo sokulinganisa, futhi ihlangabezana nezinye izidingo zokwenza iphepha.Isixazululo se-bauxite sine-acidic, futhi ukwengeza i-bauxite engaphezulu noma encane kuzothinta ngokuqondile inani le-pH le-slurry enetheni.Nakuba ukwenza iphepha manje sekushintshela ekungathathi hlangothi noma ku-alkaline, indima ye-alumina ekwenzeni iphepha namanje ayikwazi ukushaywa indiva.
Ucwaningo luye lwabonisa ukuthi ukulawulaδ amandla ngokulungisa inani le-pH le-inthanethi lingathuthukisa ngokuphumelelayo ukugeleza nokugcinwa kwe-slurry ye-intanethi, futhi ingasebenzisa ngempumelelo i-talcum powder ukulawula izithiyo ze-resin.Ukwandisa ngokufanelekile inani le-bauxite ukuze kuncishiswe inani le-pH le-slurry kunganciphisa ngokuphumelelayo ukunamathela kwe-pulp futhi kunciphise ukuphuka kokuphela okubangelwa izinwele zephepha lokucindezela ezinamathele ku-roller.Ngokuvamile kubonisa ukuthi uma sekunoboya obuningi bephepha emshinini wokunyathelisa, inani le-alumina lingakhuliswa ngendlela efanele.Nokho, inani le-bauxite kufanele lilawulwe ngendlela efanele.Uma inani likhulu kakhulu, ngeke libangele imfucuza kuphela, kodwa futhi lenze iphepha libe brittle.Futhi kuholela ekulimaleni kwezingxenye zomshini wephepha kanye nokulahleka kocingo nokuzwakala.Ngakho-ke, inani le-alumina ngokuvamile lilawulwa ngokulawula inani le-pH eliphakathi kuka-4.7 no-5.5.
Izindlela zokuchithwa kwe-alumina zifaka indlela yokushisa eshisayo kanye nendlela yokuchithwa okubandayo.Owokuqala uwukusheshisa ukuqedwa kwe-alumina ngokufudumeza;okokugcina ukusheshisa ukusakazeka nokuqedwa kwe-alumina kusisombululo esinamanzi ngokujikeleza.Uma kuqhathaniswa nendlela yokuncibilika okushisayo, indlela yokuncibilika inezinzuzo zokonga umusi kanye nokwenza ngcono indawo ezungezile, futhi iyindlela engcono yokuhlakaza.
Isikhathi sokuthumela: Jun-26-2023