Aluminium sulfate(tseem hu ua alum lossis bauxite) feem ntau yog siv los ua precipitant rau sizing.Nws cov tshuaj lom neeg tseem ceeb yog txhuas sulfate nrog 14 ~ 18 siv lead ua dej, thiab cov ntsiab lus Al2O3 yog 14 ~ 15%.Aluminium sulfate yog ib qho yooj yim rau yaj, thiab nws cov tshuaj yog acidic thiab corrosive.Cov impurities muaj nyob rau hauv bauxite yuav tsum tsis txhob ntau dhau, tshwj xeeb tshaj yog hlau ntsev yuav tsum tsis txhob siab dhau heev lawm, txwv tsis pub nws yuav chemically reacts nrog rosin pos hniav thiab dyes, cuam tshuam cov xim ntawm daim ntawv.
Tus qauv zoo ntawm sizing bauxite yog: cov ntsiab lus ntawm alumina yog ntau tshaj 15.7%, cov ntsiab lus ntawm hlau oxide yog tsawg dua 0.7%, cov ntsiab lus ntawm cov dej insoluble teeb meem yog tsawg dua 0.3%, thiab nws tsis muaj dawb sulfuric acid.
Bauxite plays lub luag haujlwm tseem ceeb hauv papermaking, ua ntej ntawm tag nrho nws yog qhov xav tau ntawm sizing, thiab nws kuj ua tau raws li lwm cov kev cai ntawm papermaking.Cov tshuaj bauxite yog acidic, thiab ntxiv ntau lossis tsawg dua bauxite yuav cuam tshuam ncaj qha rau pH tus nqi ntawm slurry ntawm lub vas.Txawm hais tias tam sim no papermaking hloov mus rau nruab nrab lossis alkaline, lub luag haujlwm ntawm alumina hauv papermaking tseem tsis tuaj yeem tsis quav ntsej.
Cov kev tshawb fawb pom tau hais tias tswj covδ muaj peev xwm los ntawm kev kho tus nqi pH hauv online tuaj yeem txhim kho cov kua dej thiab khaws cia hauv online slurry, thiab tuaj yeem siv talcum hmoov zoo los tswj cov teeb meem resin.Tsim nyog nce tus nqi ntawm bauxite kom txo tau tus nqi pH ntawm slurry kuj tuaj yeem txo qhov adhesion ntawm cov ntaub so ntswg thiab txo qhov kawg-breakage los ntawm cov xovxwm ntawv plaub hau lo rau cov menyuam.Nws feem ntau qhia tau hais tias ib zaug muaj ntau cov ntaub plaub hauv cov xovxwm, tus nqi ntawm alumina tuaj yeem nce ntxiv kom tsim nyog.Txawm li cas los xij, tus nqi ntawm bauxite yuav tsum tau tswj kom zoo.Yog tias tus nqi ntau dhau, nws yuav tsis tsuas yog ua rau cov khoom pov tseg, tab sis kuj ua rau daim ntawv nkig.Thiab ua rau corrosion ntawm daim ntawv tshuab qhov chaw thiab poob ntawm hlau thiab muaj kev xav.Yog li ntawd, tus nqi ntawm alumina feem ntau yog tswj los ntawm kev tswj tus nqi pH ntawm 4.7 thiab 5.5.
Alumina dissolution txoj kev muaj xws li kub dissolution txoj kev thiab txias dissolution txoj kev.Cov qub yog txhawm rau txhawm rau tawg ntawm alumina los ntawm cua sov;tom kawg yog kom ceev qhov diffusion thiab dissolution ntawm alumina hauv aqueous tov los ntawm kev ncig.Piv nrog rau txoj kev kub melting, txoj kev sib cais muaj qhov zoo ntawm kev txuag chav thiab kev txhim kho lub cev ib puag ncig, thiab yog txoj kev sib cais zoo dua.
Post lub sij hawm: Jun-26-2023