Cov pa roj carbon ntauferrochromeyog ib qho ntawm feem ntau ferroalloys tsim thiab yuav luag tsuas yog siv nyob rau hauv zus tau tej cov stainless hlau thiab siab chromium steels.Kev tsim khoom siv feem ntau hauv cov teb chaws uas muaj cov khoom siv chromite ore ntau heev.Cov hluav taws xob pheej yig thiab cov reductants kuj tseem ua rau muaj txiaj ntsig ntawm cov pa roj carbon ferrochrome siab.Cov cuab yeej siv ntau tshaj plaws siv yog submerged arc smelting hauv AC furnaces, txawm hais tias qhib arc smelting hauv DC furnaces tau dhau los ua ntau dua.Txoj kev thev naus laus zis ntau dua uas suav nrog cov kauj ruam ua ntej tsuas yog siv ntawm qhov ntsuas tseem ceeb los ntawm ib tus neeg tsim khoom.Cov txheej txheem ntau lawm tau dhau los ua lub zog ntau dua thiab ua kom muaj zog los ntawm kev siv cov txheej txheem siab heev xws li prereduction, preheating, agglomeration ntawm ore, thiab CO gas utilization.Tsis ntev los no cov nroj tsuag tau teeb tsa pom muaj kev pheej hmoo ntawm kev ua qias tuaj ib puag ncig thiab kev noj qab haus huv.

Tshaj li 80% ntawm lub ntiaj teb ferrochrome tso zis yog siv nyob rau hauv zus tau tej cov stainless hlau.Stainless hlau yog nyob ntawm chromium rau nws cov tsos thiab nws tsis kam mus corrosion.Qhov nruab nrab chromium cov ntsiab lus hauv stainless hlau yog 18%.FeCr kuj tseem siv tau thaum nws xav tau ntxiv chromium rau carbon hlau.FeCr los ntawm South Africa lub npe hu ua "them chrome" thiab tsim los ntawm qib qis chrome ore feem ntau yog siv hauv stainless hlau ntau lawm.High-carbon FeCr ua los ntawm qib siab ore pom nyob rau hauv Kazakhstan (nrog rau lwm qhov chaw) feem ntau yog siv nyob rau hauv cov kev siv tshwj xeeb xws li engineering steels uas siab dua Cr rau Fe piv yog ib qho tseem ceeb.

Ferrochrome ntau lawm yog qhov tseem ceeb ntawm kev ua haujlwm kub-kub carbothermic.Chrome ore (ib qho oxide ntawm chromium thiab hlau) yog txo los ntawm coke (thiab thee) los tsim cov hlau-chromium-carbon alloy.Lub tshav kub rau cov txheej txheem yog muab los ntawm cov hluav taws xob arc tsim ntawm cov lus qhia ntawm cov electrodes nyob rau hauv qab ntawm lub cub tawg thiab lub cub tawg hearth nyob rau hauv loj heev cylindrical furnaces hu ua "submerged arc furnaces."Raws li lub npe implies peb carbon electrodes ntawm lub cub tawg yog submerged rau hauv ib lub txaj ntawm cov khoom tseem ceeb thiab ib co kua sib tov ua los ntawm cov khoom carbon (coke thiab / los yog thee), khoom oxide raw cov ntaub ntawv (ore thiab fluxes) thiab cov kua FeCr alloy thiab molten slag droplets uas tau tsim.Nyob rau hauv tus txheej txheem ntawm smelting, loj npaum li cas ntawm hluav taws xob noj.Tapping ntawm cov khoom los ntawm lub cub tawg yuav siv sij hawm qhov chaw intermittently.Thaum txaus smelted ferrochrome tau sau nyob rau hauv lub hearth ntawm lub cub tawg, lub kais dej yog drilled qhib thiab ib tug kwj ntawm molten hlau thiab slag ntws tawm ib tug trough mus rau hauv ib tug txias los yog ladle.Lub ferrochrome solidifies nyob rau hauv loj castings, uas yog crushed rau muag los yog ntxiv ua tiav.