Chromium Resources ntawm Ferrochromium

Qhov ntau ntawm chromium nyob rau hauv lub ntiaj teb crust yog 0.035 feem pua, tab sis qhov tshwm sim chromium ore muaj chromium siab. Cov khoom siv chromite nyob ze-sab qaum teb-sab qab teb folds nyob rau hauv lub ntiaj teb account rau ntau tshaj 95 feem pua ​​​​ntawm lub ntiaj teb no tag nrho, thiab cov khoom siv chromium hauv Precambrian fold siv khiav los ntawm sab hnub tuaj Africa account rau 94 feem pua ​​​​ntawm lub ntiaj teb tag nrho. Ural Walisi fold siv yog kwv yees li 2 feem pua ​​​​, thiab Alpine fold siv nyiaj li 2 feem pua ​​​​ntawm lub ntiaj teb tag nrho. Lub metallogenic geological tej yam kev mob ntawm chrome ore nyob rau hauv Tuam Tshoj yog tsis zoo tagnrho, thiab sab qaum teb-sab qab teb chromite siv tsis tau pom nyob rau hauv lub Cambrian geological cheeb tsam. Lub chromite deposits nyob rau hauv Tibet-Yunnan yog nyob rau hauv lub Alpine fold siv; cov chromite deposits nyob rau hauv Xinjiang-Gansu, Qinghai-Inner Mongolia yog nyob rau hauv lub Hercynian ze-EW-trend fold siv; tsis muaj leej twg muaj cov xwm txheej rau kev tsim ntawm super-loj deposits. Lub ntsiab chromium-bearing ntxhia ntawm cov nqi lag luam yog chromium spinel, feem ntau yuam kev hu ua chromite. Qhov tseem ceeb tshaj plaws chrome spinel minerals yog 3: magnesium chromite (Mg, Fe) Cr2O4, nyuaj chrome spinel (Mg, Fe) (Cr, Al) 2O4 thiab txhuas chromite Fe (Cr, Al) 2O4.

The largest user of chrome ore is the ferroalloy industry, which accounts for about 80% of the total output of chrome ore. In the chrome ore market, it is called metallurgical grade chrome ore. High-quality metallurgical grade chrome ore requires Cr2O3>48%, S<0.1%,><0.1%, cr2o3:="" feo="">3, to produce ferrochromium containing Cr>70 feem pua. Vim qhov txo qis chrome-nplua nuj ore, cov ore nrog qis ferrochrome piv yog qhov ntau dua. Lawv tsuas yog siv tau los ua cov nqi ferrochromium.