Chromite yog ib yam khoom tseem ceeb rau kev smelting ferroalloys, stainless hlau thiab cov alloys muaj nqis. Kev lag luam metallurgical siv li ntawm 60% ntawm chromium, uas feem ntau yog siv los tsim cov hlau alloy, tshwj xeeb tshaj yog stainless hlau. Tib lub sijhawm, chromite kuj tseem siv dav hauv kev lag luam refractory, kev lag luam tshuaj lom neeg thiab kev lag luam lub teeb.
Cov khoom ntawm cov hlau
Muaj ntau tshaj li tsib caug hom chromium-muaj cov zaub mov pom muaj nyob rau hauv xwm, tab sis tsuas yog cov zaub mov muaj chromium-muaj nrog tus nqi lag luam yog chromite, uas yog spinel (MgO, Al2O3), magnesia chromite (MgO, Cr2O3), thiab magnetite. (FeO, Fe2O3) thiab lwm yam kev daws teeb meem khov. Hauv kev xav, cov mis tshuaj ntawm chromite yog FeO, Cr2O3, muaj 68% Cr2O3, 32% FeO, nruab nrab sib nqus, qhov ceev 4.1 ~ 4.7g / cm3, Mohs hardness 5.5 ~ 6.5, thiab qhov tsos ntawm qhov chaw yog los ntawm dub mus rau xim av tsaus. Gangue minerals feem ntau suav nrog olivine, serpentine thiab pyroxene, qee zaum nrog me me ntawm vanadium, nickel, cobalt thiab molybdenum pawg ntsiab lus.
Kev Siv Tshuab Ua Haujlwm
Tuam Tshoj cov peev txheej chromite tsis zoo, feem ntau nyob hauv Tibet, Xinjiang, Inner Mongolia, Gansu thiab lwm lub xeev. Cov peev txheej chromite txawv teb chaws feem ntau muab faib rau South Africa, Russia, Brazil, Tebchaws Meskas thiab lwm lub tebchaws. Chromite muaj cov yam ntxwv ntawm qhov ceev ceev, qhov nruab nrab magnetism thiab cov khoom siv lead ua loj. Feem ntau, nws raug txheeb xyuas los ntawm kev ntxuav ore, kev sib cais magnetic tsis muaj zog, qhov nruab nrab muaj zog magnetic sib cais, kev sib cais gravity, flotation thiab lwm yam txheej txheem.
Txoj kev ntxuav
Nws yog qhov tsim nyog rau cov hlau chromite uas muaj cov hlau nyoos zoo thiab feem ntau yog cov av nplaum zoo li av nplaum ua cov khoom tsis huv. Cov khoom siv sib xyaw ua ke uas tsim nyog tuaj yeem xaiv los ntawm kev ntxuav yooj yim.
Kev sib cais sib nqus
Chromite muaj cov khoom sib nqus nruab nrab thiab tuaj yeem sib cais los ntawm kev sib cais sib nqus qhuav lossis ntub. Cov hlau nplaum uas cuam tshuam yog thawj zaug sib cais los ntawm cov hlau nplaum tsis muaj zog, thiab tom qab ntawd sib cais los ntawm cov hlau nplaum CXJ lossis CFLJ, phaj sib cais sib nqus, lub nplhaib ntsug siab gradient sib nqus, thiab lwm yam. Cov khoom siv ua kom qhuav thiab ntub beneficiation, thiab tuaj yeem xaiv cov khoom tsim nyog. Txoj kev sib cais sib nqus muaj qhov zoo ntawm lub peev xwm ua tiav loj thiab cov cim qhia ruaj khov.
Qhov chaw thov chromite hauv South Africa
Kev cais cov xov xwm hnyav
Qhov hnyav tshwj xeeb ntawm chromite yog 4.1 ~ 4.7g / cm3, thiab qhov hnyav tshwj xeeb ntawm cov khoom siv gangue thiab hlau silicate feem ntau yog 2.7 ~ 3.2g / cm3. Siv qhov sib txawv ntawm qhov ceev ntawm cov khoom siv, cov chute kauv, jigging, co lub rooj, thiab cov khoom siv kauv tuaj yeem siv los cais cov khoom siv hnyav. Txoj kev no haum rau chromite nrog cov noob siv lead ua loj dua, thiab cov khoom me me yooj yim ploj mus rau hauv cov tailings.
Kev ntab dej
Chromite siv tau cov roj fatty acid lossis amine collectors los xaiv cov concentrates tsim nyog los ntawm kev roughing thiab sweeping cov txheej txheem nyob rau hauv cov xwm txheej pH tsim nyog. Nws yog qhov tsim nyog rau cov chromites zoo thiab cov nplua-grained.
Kev siv tshuaj lom neeg
Rau qee cov chrome ores uas nyuaj rau ua tiav los ntawm cov txheej txheem kho tshuab, cov txheej txheem kho tshuab - tshuaj lom neeg ua ke lossis ib txoj kev tshuaj lom neeg raug saws. Cov txheej txheem kho tshuab suav nrog: xaiv leaching, redox, fuse sib cais, sulfuric acid thiab chromic acid leaching, txo thiab sulfuric acid leaching, thiab lwm yam.
Piv txwv txog kev pab cuam
Qib ntawm Cr2O3 muaj nyob rau hauv ib qho chromite tailing hauv South Africa yog 24.80%. Nws yog ib qho kev xaiv cov tailings ntawm qhov chaw. Qhov loj me ntawm cov qauv yog -40 mesh thiab qhov loj me ntawm cov khoom me me yog sib xws. Cov chromite muaj nyob rau hauv cov khoom me me thiab cov khoom sib txuas thiab cov khoom suav nrog. Cov zaub mov tseem ceeb ntawm gangue Nws yog olivine thiab pyroxene, nrog rau me me ntawm cov av nkos zoo. Raws li qhov xwm txheej ntawm cov qauv ore, cov txheej txheem beneficiation yog tsim los ua lub nplhaib tiaj tus lossis ntsug ib kauj ruam roughing.
Cov chromite zoo uas muaj nyob rau hauv cov tailings ntawm qhov chaw chute gravity sib cais siv lub phaj tiaj tus lossis lub nplhaib ntsug muaj zog sib cais cov txheej txheem, uas tuaj yeem xaiv cov khoom tsim nyog concentrate. Cov zaub mov chromium-muaj nyob rau hauv lub magnetic tw yog cov khoom zoo-grained lossis lwm yam tsis muaj txiaj ntsig chromium-muaj cov zaub mov tau ua tiav cov cim qhia zoo.
Lub sijhawm tshaj tawm: Lub Kaum Hli-12-2021