Chromite ndi chinthu chofunikira pakusungunula ma ferroalloys, chitsulo chosapanga dzimbiri ndi ma aloyi amtengo wapatali. Makampani opanga zitsulo amagwiritsa ntchito pafupifupi 60% ya chromium, yomwe imagwiritsidwa ntchito makamaka popanga zitsulo za alloy, makamaka zitsulo zosapanga dzimbiri. Nthawi yomweyo, chromite imagwiritsidwanso ntchito kwambiri m'makampani opanga mankhwala, makampani opanga mankhwala komanso mafakitale opepuka.
Ore katundu
Pali mitundu yopitilira makumi asanu ya mchere wokhala ndi chromium yomwe imapezeka m'chilengedwe, koma mchere wokhawo wokhala ndi chromium wokhala ndi mtengo wamakampani ndi chromite, yomwe ndi spinel (MgO, Al2O3), magnesia chromite (MgO, Cr2O3), ndi magnetite. (FeO, Fe2O3) ndi njira zina zolimba. Mwachidziwitso, mankhwala a chromite ndi FeO, Cr2O3, okhala ndi 68% Cr2O3, 32% FeO, maginito apakatikati, kachulukidwe 4.1 ~ 4.7g/cm3, kuuma kwa Mohs 5.5 ~ 6.5, ndipo mawonekedwe a pamwamba amachokera kukuda mpaka bulauni. Mafuta a Gangue makamaka amaphatikizapo olivine, serpentine ndi pyroxene, nthawi zina amatsagana ndi zinthu zochepa za vanadium, nickel, cobalt ndi molybdenum.
Processing Technology
Zida za chromite zaku China ndizosauka, makamaka zimakhazikika ku Tibet, Xinjiang, Inner Mongolia, Gansu ndi zigawo zina. Zida za chromite zakunja zimagawidwa makamaka ku South Africa, Russia, Brazil, United States ndi mayiko ena. Chromite ali ndi makhalidwe a mkulu kachulukidwe, sing'anga maginito ndi coarse crystal particles. Nthawi zambiri, amasanjidwa ndi kutsuka kwa ore, kulekanitsa kofooka kwa maginito, kulekanitsa kwamphamvu kwa maginito, kulekanitsa mphamvu yokoka, kuyandama ndi njira zina.
Njira yochapira
Ndiwoyenera kupangira miyala ya chromite yokhala ndi miyala yamtengo wapatali yamtengo wapatali komanso makamaka matope abwino ngati dongo ngati zonyansa. Oyenerera coarse concentrate mankhwala akhoza kusankhidwa ndi kuchapa zosavuta.
Kupatukana kwa maginito
Chromite ili ndi maginito apakati ndipo imatha kulekanitsidwa ndi kulekanitsa kouma kapena konyowa kwamphamvu kwa maginito. The magnetite kugwirizana choyamba anasiyanitsidwa ndi ofooka maginito, ndiyeno magnetically anasiyanitsidwa ndi CXJ kapena CFLJ, mbale maginito olekanitsa, ofukula mphete mkulu gradient maginito olekanitsa, etc. zipangizo amachita youma ndi chonyowa beneficiation, ndipo akhoza kusankha oyenerera amaika maganizo mankhwala. Njira yolekanitsa maginito ili ndi ubwino wa mphamvu zazikulu zogwirira ntchito ndi zizindikiro zokhazikika.
Tsamba la South Africa chromite application
Kusanja kwambiri media
Mphamvu yokoka ya chromite ndi 4.1 ~ 4.7g / cm3, ndipo mphamvu yokoka ya minerals ya gangue ndi iron silicate nthawi zambiri imakhala 2.7 ~ 3.2g / cm3. Kutengerapo mwayi pakusiyana kwa kachulukidwe pakati pa mchere, spiral chute, jigging, tebulo logwedezeka, spiral beneficiation ingagwiritsidwe ntchito Makina, ma centrifuge ndi zida zina zolemetsa zosanja. Njirayi ndi yoyenera kwa chromite yokhala ndi tirigu wokulirapo wa kristalo, ndipo tinthu tating'onoting'ono timatayika mosavuta mumichira.
Kuyandama
Chromite imatha kugwiritsa ntchito mafuta acid kapena otolera amine kuti asankhe zowunikira zoyenerera kudzera munjira zovutirapo komanso zosesa pansi pa pH yoyenera. Ndiwoyenera kwa ma chromites opangidwa bwino komanso opangidwa bwino.
Chemical Beneficiation
Kwa ores ena a chrome omwe ndi ovuta kukonzedwa ndi njira zothandizira mawotchi, kupindula-mankhwala ophatikizika kapena njira imodzi yamankhwala imatengedwa. Njira zothandizira mankhwala zimaphatikizapo: kusankha leaching, redox, kupatukana kwa fuse, sulfuric acid ndi chromic acid leaching, kuchepetsa ndi sulfuric acid leaching, etc.
Chitsanzo cha Beneficiation
Gulu la Cr2O3 lomwe lili mumchira wina wa chromite ku South Africa ndi 24.80%. Ndi machuti osankhidwanso pamalo osankhidwa. Kukula kwachitsanzo ndi -40 mauna ndipo kukula kwa tinthu kumakhala kofanana. Chromite imapezeka mu tinthu tating'onoting'ono ndi matupi olumikizana ndi ma inclusions. Mchere waukulu wa gangue Ndi olivine ndi pyroxene, ndi matope ochepa chabe. Malinga ndi chikhalidwe cha zitsanzo ore, Beneficiation ndondomeko anakhazikitsidwa monga lathyathyathya kapena ofukula mphete sitepe imodzi roughing.
Chromite yowoneka bwino yomwe ili m'mizere yolekanitsa mphamvu yokoka ya chute yomwe ili pamalopo imatenga mbale yathyathyathya kapena mphete yoyima yamphamvu yolekanitsa maginito, yomwe imatha kusankha zinthu zokhazikika. Maminolo okhala ndi chromium mumchira wa maginito ndi ophatikizika bwino kapena mchere wina wopanda chromium wokhala ndi chromium wapeza zizindikiritso zabwino zopindula.
Nthawi yotumiza: Oct-12-2021