Yuav Ua Li Cas Tau Txais Aluminium Oxide
Koj puas tau xav li cas kom taualuminium oxide? Aluminium oxide, tseem hu ua alumina, yog cov khoom siv dawb crystalline feem ntau siv hauv kev tsim cov ceramics, iav, thiab ntau yam alloys. Hauv tsab xov xwm no, peb yuav mus dhau qee txoj hauv kev kom tau txais aluminium oxide.
Txoj Kev 1: Cov txheej txheem Bayer
Txoj kev lag luam tshaj plaws kom tau txais txhuas oxide yog txheej txheem Bayer. Cov txheej txheem no suav nrog kev sib cais cov bauxite ore, uas muaj txhuas oxide, nyob rau hauv ib qho kev daws ntawm sodium hydroxide nyob rau hauv siab kub thiab siab. Cov kev daws teeb meem yog lim, thiab aluminium hydroxide precipitated tawm yog calcined kom tau txais aluminium oxide. Cov txheej txheem Bayer yog kim thiab muaj kev cuam tshuam ib puag ncig, tab sis nws tseem siv dav vim nws cov txiaj ntsig thiab kev tsim khoom loj.
Txoj Kev 2: Electrolysis
Lwm txoj hauv kev kom tau txais aluminium oxide yog los ntawm electrolysis. Cov txheej txheem no suav nrog kev hla cov hluav taws xob tam sim no los ntawm kev sib xyaw molten ntawm aluminium oxide thiab cryolite (ib qho ntxhia uas txo qis qhov melting point ntawm aluminium oxide). Qhov tam sim no ua rau cov txhuas oxide dissociate rau txhuas hlau thiab cov pa oxygen. Tom qab ntawd cov hlau aluminium yog sau, tawm hauv qab aluminium oxide. Electrolysis yog lub zog siv zog, tab sis nws yog qhov tsim nyog rau kev tau txais high-purity aluminium oxide.
Txoj Kev 3: Nplaim Txhaum Pyrolysis
Ib txoj kev thib peb kom tau txaisaluminium oxideNws yog tsim los ntawm cov nplaim hluav taws xob pyrolysis. Cov txheej txheem no suav nrog kev txau cov kua ua kua ntawm aluminium precursors (xws li txhuas nitrate) rau hauv nplaim taws, qhov twg cov precursors vaporize thiab hnov mob los ua aluminium oxide hais. Tom qab ntawd cov khoom yog sau thiab purified. Nplaim tshuaj tsuag pyrolysis yog ib txoj hauv kev tshiab kom tau txais txhuas oxide, tab sis nws tau pom cov lus cog tseg rau kev tsim cov khoom zoo thiab cov khoom zoo heev. Hauv kev xaus, muaj ntau txoj hauv kev kom tau txais txhuas oxide, nrog rau cov txheej txheem Bayer, electrolysis, thiab nplaim hluav taws tsuag pyrolysis. Txhua txoj kev muaj nws qhov zoo thiab qhov tsis zoo, thiab qhov kev xaiv ntawm txoj kev yog nyob ntawm ntau yam, suav nrog tus nqi, nplai ntawm kev tsim khoom, thiab qhov xav tau purity.
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