Ferrochrome, kapenaferrochromium(FeCr) ndi mtundu wa ferroalloy, ndiko kuti, aloyi ya chromium ndi chitsulo, yomwe imakhala ndi 50 mpaka 70% chromium polemera.

Ferrochrome amapangidwa ndi magetsi arc carbothermic kuchepetsa chromite.Zambiri zapadziko lonse lapansi zimapangidwira ku South Africa, Kazakhstan ndi India, zomwe zili ndi ma chromite ambiri apanyumba.Zowonjezereka zimachokera ku Russia ndi China.Kupanga zitsulo, makamaka zitsulo zosapanga dzimbiri zomwe zili ndi chromium 10 mpaka 20%, ndizogula kwambiri komanso ntchito yaikulu ya ferrochrome.

Kugwiritsa ntchito

Zoposa 80% za dziko lapansiferrochromeamagwiritsidwa ntchito popanga zitsulo zosapanga dzimbiri.Mu 2006, 28 Mt yachitsulo chosapanga dzimbiri idapangidwa.Chitsulo chosapanga dzimbiri chimadalira chromium pamawonekedwe ake komanso kukana dzimbiri.Avereji ya chrome muzitsulo zosapanga dzimbiri ndi pafupifupi.18%.Amagwiritsidwanso ntchito kuwonjezera chromium ku carbon steel.FeCr yaku South Africa, yotchedwa "charge chrome" komanso yopangidwa kuchokera ku Cr yokhala ndi ore yokhala ndi mpweya wochepa, imagwiritsidwa ntchito kwambiri popanga zitsulo zosapanga dzimbiri.Kapenanso, mpweya wochuluka wa FeCr wopangidwa kuchokera ku miyala yamtengo wapatali yomwe imapezeka ku Kazakhstan (pakati pa malo ena) imagwiritsidwa ntchito kwambiri pa ntchito zaukadaulo monga zitsulo zaumisiri pomwe chiŵerengero cha Cr/Fe ndi zinthu zina zochepa (sulfure, phosphorous, titaniyamu ndi zina zotero). .. ndizofunikira ndipo kupanga zitsulo zomalizidwa kumachitika m'ng'anjo zazing'ono zamagetsi poyerekeza ndi ng'anjo zazikulu zophulika.

Kupanga

Kupanga ferrochrome kwenikweni ndi ntchito yochepetsera carbothermic yomwe ikuchitika pakutentha kwambiri.Chromium ore (an oxide of Cr ndi Fe) imachepetsedwa ndi malasha ndi coke kupanga aloyi ya iron-chromium.Kutentha kwa izi kumatha kubwera kuchokera kumitundu ingapo, koma nthawi zambiri kuchokera ku arc yamagetsi yomwe imapangidwa pakati pa nsonga za maelekitirodi pansi pa ng'anjo ndi ng'anjo ya ng'anjo.Arc iyi imapanga kutentha pafupifupi 2,800 °C (5,070 °F).Posungunuka, magetsi ochuluka amawotchedwa, zomwe zimapangitsa kupanga kukhala kodula kwambiri m'mayiko omwe mphamvu zamagetsi zimakhala zokwera mtengo.

Kugogoda kwa zinthu kuchokera ku ng'anjo kumachitika pang'onopang'ono.Pamene ng'anjo yosungunuka yokwanira yaunjikana, bowolo limabowoledwa ndipo zitsulo zosungunuka ndi slag zimathamangira mumphika kukhala kozizira kapena ladle.Ferrochrome imakhazikika m'magulu akuluakulu omwe amaphwanyidwa kuti agulitse kapena kukonzedwanso.

Ferrochrome nthawi zambiri imagawidwa ndi kuchuluka kwa kaboni ndi chrome yomwe ili nayo.Zambiri za FeCr zomwe zimapangidwa ndi "charge chrome" kuchokera ku South Africa, pomwe mpweya wochuluka ndi gawo lachiwiri lalikulu kwambiri ndikutsatiridwa ndi magawo ang'onoang'ono a carbon dioxide ndi ma carbon apakatikati.