Cov thawj cov khoom siv raw rau ferriochrome ntau lawm yogChromite Ore (Fecr₂o₄).
Lwm cov ntaub ntawv tseem ceeb suav nrog:
1. Chromite Ore (Fecr₂o₄)
Lub hauv paus tseem ceeb ntawm chromium, pom nyob rau hauv cov teb chaws zoo li South Africa, Is Nrias teb, Kazakhstan, thiab Qaib ntxhw.
Feem ntau muaj40-50% CR₂O₃ (chromium oxide).
2. Txo cov neeg sawv cev(Siv los rho cov chromium thiab hlau los ntawm chromite)
Coek(Cov pa roj carbon)
Thee(qee zaum siv nyob rau hauv qhov chaw coke)
Thee(hauv qee cov roj carbon ferriochrome ntau lawm)
3. Fluxing tus neeg sawv cev(Pab tshem tawm impurities thiab daim ntawv slag)
Limestone (CaCo₃)- tshem tawm cov leej txiv leej thiab ruaj khov swb
Dolomite (camg (co₃) ₂)- pab hauv kev sib dhos
Quartz (siio₂)- Tswj Silicon Cov Ntsiab Lus
4. Zog Zog
Fai fab: Ferrroidrome yog tsim nyob rau hauvSubmerged Arc Furnaces (Saf)Siv high-fais fab hluav taws xob arcs.
