Bauxite vs Aluminium
Txawm peb paub txog txhuas, peb tsis paub ntau txog qhov twg los. Yog li, lo lus bauxite yog qhov tsis paub rau peb. Hauv qab no yog cov lus piav qhia txog txhuas thiab bauxite, lawv txoj kev sib raug zoo thiab qhov sib txawv.
Aluminium
Aluminium los yog Al yog ib lub caij nyob rau hauv pawg 3 thiab lub sij hawm 3, uas muaj cov atomic tooj ntawm 13. Cov electron configuration ntawm Al yog 1s2 2s 2 2p6 3s2 3p1 Al yog ib qho nyiaj dawb dawb, thiab nws yog cov hlau ntau tshaj plaws nyob rau hauv lub ntiaj teb crust. Al tsis soluble hauv dej ntawm chav tsev kub. Atomic hnyav ntawm Al yog hais txog 27 g mol-1, thiab nws yog lub teeb yuag, tsis tshua muaj ntom (tab sis ntom dua dej) thiab cov hlau ruaj khov. Nws yog ib tug zoo hluav taws xob conductor. Al tsis yooj yim ignite. Al yog qhia ob qho tib si hlau thiab tsis yog xim hlau; Yog li ntawd, nws yog amphoteric. Raws li ib tug hlau, nws reacts nrog acids tso hydrogen gas ib daim ntawv lub +3 them hlau ion. Raws li tsis yog-hlau, nws reacts nrog kub alkali daws thiab tsim aluminate ions. Txij li thaum Al yog heev reactive nyob rau hauv nws daim ntawv dawb, ib txwm nws tshwm sim nyob rau hauv minerals. Lub ntsiab Al uas muaj cov ntxhia yog bauxite. Loj bauxite ores nyob rau hauv Australia, Brazil, Jamaica thiab Guinea. Nws tseem nyob hauv cov zaub mov xws li cryolite, beryl, garnet thiab lwm yam khoom siv tsheb, rau cov khoom siv tsheb, khoom siv qis thiab tiv taus corrosion. Ntshiab aluminium yog mos thiab tsis muaj zog siv nws, tab sis nws yog tov nrog lwm yam xws li hlau los yog silicon (hauv me me) kom muaj zog thiab hardness.
Bauxite
Aluminium yog qhov muaj zog heev, yog li nws tshwm sim hauv oxides lossis hydroxide daim ntawv, feem ntau ntawm lub sijhawm. Bauxite yog ib hom pob zeb sedimentary, uas yog cov ntxhia pob zeb ntawm txhuas. Nws feem ntau muaj txhuas hydroxide, Al (OH)3thiab txhuas oxide (nws yog ib qho sib xyaw ntawm gibbsite, boehmite thiab diaspore). Tsis tas li ntawd, muaj cov hlau oxides, hydroxides thiab lwm yam khoom siv sib xyaw hauv nws ib yam nkaus. Nws muaj xim dawb, grey, liab thiab daj xim sib xyaw. Cov mineral yog translucent. Feem ntau, cov bauxite deposits yog nyob rau hauv tropical thiab subtropical cheeb tsam thiab nyob rau hauv cov teb chaws Europe. Feem ntau ntawm cov bauxite yog mined los ntawm cov mines nto, uas muaj cov pam loj hom deposits. Ib txhia yog tsim los ntawm underground excavations. Tsis zoo li qee cov hlau ore, bauxite feem ntau nyob rau hauv cov xwm txheej zoo, yog li ntawd, yuav tsum tau ua tsawg dua los ntxuav nws. Cov bauxite no ces hloov mus rau alumina los ntawm cov txheej txheem tshuaj. Txhuas tuaj yeem sib cais los ntawm alumina los ntawm kev siv electrolysis (Hall process). Bauxite yog siv los ua abrasive, rau cement, tshuaj, pleev thiab lwm yam khoom.
Qhov txawv ntawm Aluminium thiab Bauxite yog dab tsi?
• Txhuas yog ib yam khoom; bauxite yog ib qho sib xyaw ntawm aluminium compounds thiab ob peb lwm cov tebchaw.
• Bauxite yog cov pob zeb tseem ceeb ntawm txhuas. Nws yog qhov zoo tshaj plaws yooj yim thiab siv tau zoo rau kev siv txhuas txhuas los ntawm bauxite dua li ntawm lwm yam txhuas uas muaj cov ntxhia.
• Bauxite tshwm sim ib txwm muaj, tab sis ntshiab Al tsis tshua tshwm sim.
• Txhuas yog silvery dawb xim whereas bauxite yog yellowish, reddish xim av.
