Cov alumina hauv tsev feem ntau yog los ntawm Australia. Australian alumina imports account rau 67% ntawm cov khoom siv alumina hauv tsev, Indonesia suav txog 5%, thiab Is Nrias teb suav txog 2%. Tuam Tshoj tus alumina ntau lawm yuav tsum tau cia siab rau imports kom tau raws li domestic thov, thiab alumina imports deb tshaj exports.
Electrolytic aluminium ntau lawm txheej txheem
Nyob rau hauv 1886, American engineers invented lub cryolite-alumina molten ntsev electrolytic txhuas smelting txoj kev.
Cov txheej txheem ntawm electrolytic aluminium yog raws li nram no:
Thawj kauj ruam: electrolytic cell roasting (kom qhuav cov electrolytic cell mus rau 930 degree ~ 970 degree, feem ntau yuav siv sij hawm 4 mus rau 8 hnub)
Kauj Ruam 2: Ntxuav thiab debug cov electrolytic cell (kua lub cryolite hnyav los ua cov txhuas electrolytic yaj, ntxuav cov pa roj carbon residue, thiab kho qhov tseem ceeb ntawm cov electrolytic cell)
Kauj Ruam 3: Electrolytic Aluminium Smelting Production
Electrolytic aluminium smelting yog smelting txuas nrog siab zog noj thiab siab "carbon" emissions. Txhua tuj ntawm electrolytic txhuas yuav tsum tau smelt 13,500 kw.h ntawm ncaj qha tam sim no, accounting rau ntau tshaj 70% ntawm lub zog noj ntawm tag nrho cov txhuas kev lag luam. Cov txheej txheem smelting emits ntau cov pa roj carbon dioxide.
