Ferrocrome (FECR) yog ib qho alloy ntawm hlau thiab chromium siv feem ntau hauv cov hlau ua, tshwj xeeb tshaj yog rau cov hlau stainless. Ferrochrome cov txheej txheem koom nrog smelting chromite ore (fecr₂o₄) nyob rau hauv lub tshuab cua sov siab. Muaj ntau txoj hauv kev rau kev tsim ferrrochrome, tab sis feem ntau yog tusSubmerged Arc Rauv (Saf) Txuj Ci.
Ntawm no yog ib qib zuj zus ntawm-kauj ruam piav qhia:
1. Raw Khoom Npaj
Chromite Ore (Fecr₂o₄):Lub ntsiab ntawm chromium.
Txo cov neeg sawv cev: Feem ntau, coke lossis thee yog siv los txo chromite.
Fluxes: Limestone, dolomite, lossis quartz tuaj yeem ntxiv rau tshem tawm impurities.
2. Melting txheej txheem (Immersion arc rauv txoj kev)
Cov ntaub ntawv nyoos yog sib xyaw thiab pub rau hauv aSubmerged arc rauv (Saf).
High-voltage hluav taws xob muab cov hluav taws xob sivCov Khoom Siv Roj Carbon Electrodes.
Kev kub siab (1, 500-1, 800 degree lossis 2, {}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}, 270 degree f) melts cov ntaub ntawv.
Txo cov tshuaj tiv thaiv: Fecr2o 4+4 C} C}}} co carbon los ntawm cov pa roj oxygen nrog cov chromium thiab hlau.
3. Ferrochrome sib cais
Molten FerrioRome yog cov hnyav thiab tog rau hauv qab ntawm lub cub tawg.
Impurities (slag) ntab mus rau sab saum toj thiab raug tshem tawm.
Ua kua ferriachrome yog hliv tawm ntawm cov cua sov thiab nchuav rau hauv kev tso ua lossis granulated.
4. Refining (yog tias tsim nyog)
Nyob ntawm cov ntsiab lus carbon, ferrroidrome tuaj yeem yog qhov ua kom zoo ntxiv.
High carbon ferriachrome (HC FECR):Ncaj qha siv hauv steelmaking.
Cov pa roj carbon ferriorome (LC FECR):Tsim los ntawm kev ua kom tiav HC FECRlos ntawm converter txoj kevlossisLub tshuab nqus tsev ua kom huv.
5. Kev Ua Zaum Kawg
Lub hardened ferrroidrome yog crushed thiab crushed raws li kev lag luam yuav tsum tau ua.
Nws yog muab rau cov hlau manufacturers rau kev tsim cov hlau stainless.