Tus nqi ntawm seem ntawm txhuas: Tom qab yaj tag, nws tuaj yeem rov ua dua tshiab ob peb zaug los ua cov khoom siv rov ua hmoov txhuas, uas tuaj yeem siv los tsim cov tshuab kev lag luam thiab cov khoom lag luam qog. Qhov txiaj ntsig ntawm ib puag ncig thiab cov peev txheej yog: kev siv tshuaj txhuas dua tshiab tuaj yeem txuag tau 95% ntawm cov khoom siv uas xav tau rau aluminium tshiab. Cov ntawv txhuam cov hlau txhuam yog siv los ua kom ntsev cov hlau thiab cov hlau oxide liab. Siv hlau yog siv hauv kev txiav txim siab steel. Tom qab cov khawb tooj liab yog rov txhuam dua, nws tuaj yeem pov rau hauv qhov chaw ntawm kev siv tshuab ua khoom noj thiab lwm yam.
Rov qab siv cov hlau pov tseg tuaj yeem txhawb txoj kev loj hlob ntawm kev lag luam ncig. Nws tuaj yeem txo qis qhov kev thov loj hlob rau cov khoom siv pob zeb hauv kev txhim kho hauv kev sib raug zoo thiab kev txhim kho, txo qis cov thee, hluav taws xob thiab lwm yam kev siv hluav taws xob hauv cov txheej txheem ntau lawm, txo cov pa phem ib puag ncig, thiab siv zog ua kom muaj kev tiv thaiv ib puag ncig ntawm lub zej zog.
