Npua hlau yog khoom ntawm smelting hlau ore (kuj ilmenite) nrog cov roj carbon ntau thiab reductant xws li coke, feem ntau nrog limestone ua flux. Charcoal thiab anthracite kuj siv los ua roj thiab txo qis. Npua hlau yog tsim los ntawm smelting los yog hlau ore nyob rau hauv blast furnaces los yog smelting ilmenite nyob rau hauv hluav taws xob furnaces.
npua hlau txhais li cas?
Npua hlau, tseem hu ua crude hlau, yog ib qho khoom nruab nrab ntawm kev lag luam hlau hauv kev tsim cov hlau uas tau los ntawm smelting hlau ore hauv qhov cub tawg. … Thaum cov hlau tau txias thiab tawv, cov ingots me me (cov "npua") tsuas yog tawg ntawm tus khiav ("sow"), li no lub npe "npua hlau".
npua hlau yog dab tsi thiab vim li cas nws thiaj hu ua?
npua hlau yog cov khoom nruab nrab ntawm smelting steel ore nrog coke thiab resin. … Thaum cov hlau tau txias thiab tawv, cov ingots me (cov npua) tau tawg los ntawm cov thinner runner (tus sow), li no lub npe npua hlau.
Dab tsi yog qhov txawv ntawm hlau thiab npua hlau?
Qhov txawv ntawm cov hlau cam khwb cia thiab npua hlau yog: (A) cam khwb cia hlau yog cov hlau ntshiab tshaj plaws thaum npua hlau tsis huv. (B) cam khwb cia hlau muaj cov ntsiab lus qis carbon (3%) piv rau npua hlau (4%) thiab yog ib qho nyuaj heev thiab nkig. … (D) Cam khwb cia hlau yog mos thiab malleable thaum npua hlau yog ib qho nyuaj thiab nkig.
Dab tsi yog npua hlau thiab nwssiv?
Npua hlau yog ib qho khoom siv ntawm cov hlau kub, tau los ntawm cov hlau ore los yog cov khoom siv rov ua dua tshiab, thiab nws tau ua tiav nrog lub qhov cub tawg lossis hluav taws xob arc rauv. Npua hlau yog siv ua raw khoom rau hlau uathiab feem ntau ntawm cov khoom no yog imported.
