Chromite ndi chinthu chofunikira kwambiri poyenga zitsulo zopangidwa ndi ferroalloy, chitsulo chosapanga dzimbiri ndi zitsulo zamtengo wapatali. Makampani opanga zitsulo amagwiritsa ntchito pafupifupi 60% ya chromium, yomwe imagwiritsidwa ntchito kwambiri popanga zitsulo zopangidwa ndi alloy, makamaka chitsulo chosapanga dzimbiri. Nthawi yomweyo, chromite imagwiritsidwanso ntchito kwambiri m'makampani opanga zinthu zotsutsana ndi chitsulo, makampani opanga mankhwala ndi makampani opanga kuwala.
Katundu wa miyala
Pali mitundu yoposa makumi asanu ya mchere wokhala ndi chromium yomwe imapezeka m'chilengedwe, koma mchere wokhawo wokhala ndi chromium womwe uli ndi phindu la mafakitale ndi chromite, womwe ndi spinel (MgO, Al2O3), magnesia chromite (MgO, Cr2O3), ndi magnetite. (FeO, Fe2O3) ndi mayankho ena olimba. Mwachidziwitso, njira ya mankhwala ya chromite ndi FeO, Cr2O3, yokhala ndi 68% Cr2O3, 32% FeO, maginito apakatikati, kuchuluka kwa 4.1 ~ 4.7g/cm3, kuuma kwa Mohs 5.5 ~ 6.5, ndipo mawonekedwe a pamwamba amayambira pakuda mpaka bulauni wakuda. Michere ya Gangue makamaka imaphatikizapo olivine, serpentine ndi pyroxene, nthawi zina imatsagana ndi zinthu zochepa za vanadium, nickel, cobalt ndi molybdenum.
Ukadaulo Wokonza
Zinthu za chromite ku China ndi zosauka, makamaka ku Tibet, Xinjiang, Inner Mongolia, Gansu ndi madera ena. Zinthu za chromite zakunja zimapezeka makamaka ku South Africa, Russia, Brazil, United States ndi mayiko ena. Chromite ili ndi mawonekedwe a high density, medium magnetism ndi coarse crystal tinthu. Kawirikawiri, imasankhidwa ndi kutsuka miyala, kugawa kwa maginito ofooka, kugawa kwa maginito amphamvu apakati, kugawa kwa mphamvu yokoka, kuyandama ndi njira zina.
Njira yotsukira
Ndi yoyenera miyala ya chromite yokhala ndi miyala yaiwisi yapamwamba kwambiri komanso matope osalala ngati dongo ngati zinyalala. Zinthu zoyenera zosakaniza za coarse zitha kusankhidwa mwa kutsuka mosavuta.
Kulekanitsa maginito
Chromite ili ndi mphamvu yapakati ya maginito ndipo imatha kulekanitsidwa ndi kulekanitsa kwamphamvu kwa maginito kouma kapena konyowa. Magnetite yogwirizana nayo poyamba imalekanitsidwa ndi maginito ofooka, kenako imalekanitsidwa ndi maginito ndi CXJ kapena CFLJ, separator ya maginito ya mbale, separator ya maginito yolunjika ya mphete yokwera kwambiri, ndi zina zotero. Zipangizozi zimachita zinthu zouma komanso zonyowa, ndipo zimatha kusankha zinthu zoyenera. Njira yolekanitsa maginito ili ndi ubwino wokhala ndi mphamvu yayikulu yokonza ndi zizindikiro zokhazikika.
Malo ogwiritsira ntchito chromite ku South Africa
Kusankha zinthu zolemera
Mphamvu yeniyeni ya chromite ndi 4.1 ~ 4.7g / cm3, ndipo mphamvu yeniyeni ya mchere wa gangue ndi iron silicate nthawi zambiri imakhala 2.7 ~ 3.2g / cm3. Pogwiritsa ntchito kusiyana kwa kuchulukana pakati pa mchere, spiral chute, jigging, shaking table, spiral beneficiation, makina angagwiritsidwe ntchito, ma centrifuges ndi zida zina zolemera zokonzera. Njirayi ndi yoyenera chromite yokhala ndi tinthu tating'onoting'ono ta kristalo, ndipo tinthu tating'onoting'ono timatayika mosavuta m'magawo.
Kuyandama
Chromite ingagwiritse ntchito mafuta osonkhanitsa asidi kapena amine kuti isankhe zinthu zoyenera pogwiritsa ntchito njira zowongoka ndi zosweka pansi pa pH yoyenera. Ndi yoyenera ma chromite odulidwa bwino komanso odulidwa bwino.
Kupindulitsa kwa mankhwala
Pa miyala ina ya chrome yomwe ndi yovuta kuikonza pogwiritsa ntchito njira zopangira zinthu, njira zopangira zinthuzi—njira yophatikizana ndi mankhwala kapena njira imodzi ya mankhwala imagwiritsidwa ntchito. Njira zopangira zinthuzi zikuphatikizapo: kuyeretsa zinthu mosankha, redox, kusiyanitsa fuse, kuyeretsa zinthu kuchokera ku sulfuric acid ndi chromic acid, kuchepetsa ndi kuyeretsa zinthu kuchokera ku sulfuric acid, ndi zina zotero.
Chitsanzo cha phindu
Gulu la Cr2O3 lomwe lili mu chromite tailing ku South Africa ndi 24.80%. Ndi chute re-selection tailings pamalopo. Kukula kwa chitsanzo ndi -40 mesh ndipo kukula kwa tinthu timeneti ndi kofanana. Chromite imapezeka mu tinthu tating'onoting'ono ndi matupi olumikizana ndi zinthu zina. Mineral yayikulu ya gangue Ndi olivine ndi pyroxene, yokhala ndi matope ochepa. Malinga ndi mtundu wa zitsanzo za miyala, njira yophikira imakhazikitsidwa ngati mphete yathyathyathya kapena yoyimirira yozungulira sitepe imodzi.
Chromite yopyapyala yomwe ili m'mbuyo mwa chute gravity learning yomwe ili pamalopo imagwiritsa ntchito njira yopatukana ya flat plate kapena vertical ring strong magnetic leating, yomwe ingasankhe zinthu zoyenera zosakanikirana. Michere yokhala ndi chromium yomwe ili mu magnetic tail ndi inclusions yopyapyala kapena mchere wina wosakhala wamtengo wapatali wokhala ndi chromium wapeza zizindikiro zabwino zopindulitsa.
Nthawi yotumizira: Okutobala-12-2021