Nrog rau kev nce qib zoo rau cov hlau cam khwb cia, kev siv aluminium rau deoxidation ntawm qee cov qib siab castings tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua. Yog li ntawd, kev siv aluminium thiab calcium composite deoxidation tau txais kev saib xyuas ntau.
Nyob rau hauv qhov kawg deoxidation, kev sib xyaw ntawm txhuas thiab calcium tuaj yeem tsis tsuas yog txo cov pa oxygen hauv cov hlau, tab sis kuj txhim kho cov khoom tsis yog hlau.
Vim tias qhov ntom ntawm calcium tsuas yog 1/5 ntawm cov hlau, qhov kub ntawm qhov taw tes yog 1492â, uas yog qis dua qhov kub ntawm cov hlau molten, thiab nws cov dej num muaj zog heev, yog li nws tsis yooj yim rau kev tswj xyuas nws thaum siv. hauv steelmaking. Qhov kev txwv no tau txwv qhov nrov thiab siv cov calcium hauv cam khwb cia hlau.
Hauv 20 xyoo dhau los, kev nkag siab ntawm lub luag haujlwm ntawm calcium hauv cov hlau tau tob zuj zus, thiab cov txheej txheem thov tau maj mam loj hlob. Tam sim no, nws tau siv dav.
