Aluminum sulfate(wanda kuma aka sani da alum ko bauxite) yawanci ana amfani dashi azaman hazo don girman girman.Babban sinadaran abun da ke ciki shine aluminum sulfate tare da ruwa 14 ~ 18 crystal, kuma abun ciki na Al2O3 shine 14 ~ 15%.Aluminum sulfate yana da sauƙin narkewa, kuma maganin sa shine acidic da lalata.Najasa da ke cikin bauxite bai kamata ya yi yawa ba, musamman ma gishirin ƙarfe bai kamata ya yi yawa ba, in ba haka ba zai yi maganin sinadarai da rosin gum da rini, yana shafar launin takarda.
Ma'aunin ingancin sizing bauxite shine: abun ciki na alumina ya fi 15.7%, abun ciki na baƙin ƙarfe oxide ƙasa da 0.7%, abun ciki na ruwa maras narkewa kasa da 0.3%, kuma ba ya ƙunshi free sulfuric acid.
Bauxite yana taka muhimmiyar rawa wajen yin takarda, da farko shi ne buƙatar girman girman, kuma ya dace da sauran bukatun yin takarda.Maganin bauxite acidic ne, kuma ƙara ƙarin ko žasa bauxite zai shafi ƙimar pH kai tsaye na slurry akan gidan yanar gizo.Kodayake yin takarda yanzu yana canzawa zuwa tsaka-tsaki ko alkaline, har yanzu ba za a iya watsi da rawar alumina a cikin yin takarda ba.
Nazarin ya nuna cewa sarrafa daδ yuwuwar ta hanyar daidaita ƙimar pH na kan layi na iya inganta ingantaccen magudanar ruwa da riƙewar slurry na kan layi, kuma yana iya yin amfani da talcum foda yadda yakamata don sarrafa shingen guduro.Daidaita yawan adadin bauxite don rage ƙimar pH na slurry kuma zai iya rage mannewar ɓangaren litattafan almara da kuma rage ƙarshen ƙarshen lalacewa ta hanyar gashin takarda mai mannewa ga abin nadi.Yawancin lokaci yana nuna cewa da zarar akwai ulun takarda da yawa a cikin latsawa, ana iya ƙara adadin alumina daidai.Koyaya, yakamata a sarrafa adadin bauxite da kyau.Idan adadin ya yi yawa, ba kawai zai haifar da sharar gida ba, har ma ya sa takarda ta lalace.Kuma kai ga lalata sassan injin takarda da asarar waya da ji.Sabili da haka, ana sarrafa adadin alumina gaba ɗaya ta hanyar sarrafa ƙimar pH tsakanin 4.7 da 5.5.
Hanyoyin narkar da alumina sun haɗa da hanyar rushewar zafi da kuma hanyar rushewar sanyi.Na farko shine don hanzarta rushewar alumina ta hanyar dumama;na karshen shine don hanzarta yadawa da rushewar alumina a cikin maganin ruwa ta hanyar wurare dabam dabam.Idan aka kwatanta da hanyar narkewa mai zafi, hanyar rushewar tana da fa'idodin ceton tururi da inganta yanayin jiki, kuma shine mafi kyawun hanyar rushewa.
Lokacin aikawa: Juni-26-2023