1. Dab tsi yog Silicon Carbide rau Steelmaking?
Hauv qhov tseem ceeb, nws yog kev lag luam - qib silicon carbide tau hais ua ntej, tab sis nrog cov kev cai nruj dua raws li cov txheej txheem steelmaking:
High Purity: Txawm hais tias tsis yog ntshiab li qib abrasive, SiC cov ntsiab lus ntawm silicon carbide siv rau steelmaking feem ntau yuav tsum nyob nruab nrab ntawm 85% mus rau 95% lossis siab dua. Tsis tshua muaj purity thiab siab impurity yuav cuam tshuam rau qhov zoo ntawm cov hlau molten.
Daim Ntawv Qhia Tshwj Xeeb: Nws yog feem ntau ua tiav rau hauv cov khoom sib xws lossis cov granules rau kev thauj mus los yooj yim, khaws cia, thiab meej ntxiv rau hauv cov hlau molten.
Lub hom phiaj meej: Nws tsim thiab npaj siv yog tshwj xeeb heev: los pab cov txheej txheem steelmaking.
2. Nws Ua Haujlwm Li Cas hauv Steelmaking? (Core Functions)
Silicon carbide plays lub luag haujlwm ntau yam hauv steelmaking, nrog nws cov haujlwm tseem ceeb raws li hauv qab no:
1. Muaj txiaj ntsig Deoxidizer
Qhov no yog nws lub luag haujlwm tseem ceeb.
Lub hauv paus ntsiab lus: Thaum lub sij hawm steelmaking txheej txheem (tshwj xeeb tshaj yog nyob rau hauv lub refining theem tom qab tapping los ntawm ib tug hluav taws xob Arc rauv los yog Converter), cov hlau molten muaj ib tug tseem ceeb npaum li cas ntawm cov pa oxygen, uas ua rau cov hlau zoo heev. Ob leeg silicon thiab carbon nyob rau hauv silicon carbide (SiC) muaj peev xwm los khi nrog oxygen.
Tshuaj Reactions:
SiC + 2[O] → SiO₂ + [C]
2C + [O] → CO₂↑
Cov nyhuv: Lawv zoo tshem tawm cov pa oxygen los ntawm cov hlau molten, tsim silicon dioxide (SiO₂) uas nkag mus rau hauv slag, thiab cov pa roj carbon dioxide uas raug tshem tawm. Nws cov nyhuv deoxidizing yog zoo dua thiab meej dua li siv ferrosilicon lossis coke ib leeg.
2. Carburizer
Lub hauv paus ntsiab lus: Thaum lub sij hawm deoxidation txheej txheem, silicon carbide kuj tso carbon rau hauv cov hlau molten.
Cov nyhuv: Nws tso cai rau kev hloov pauv ntawm cov ntsiab lus carbon hauv cov hlau molten kom ua tau raws li qhov yuav tsum tau ua ntawm lub hom phiaj steel qib. Qhov no yog qhov tseem ceeb rau kev tswj lub zog thiab hardness ntawm cov hlau.
3. Cua sov / Kub Raising Agent
Lub hauv paus ntsiab lus: Thaum silicon carbide reacts nrog oxygen nyob rau hauv lub molten hlau los yog oxygen tshuab mus rau hauv lub cub tawg, nws tso tawm ib tug loj npaum li cas ntawm tshav kub.
Cov nyhuv: Qhov no pab tswj los yog nce qhov kub ntawm cov hlau molten thaum lub sij hawm refining txheej txheem, txo tshav kub poob, thiab xyuas kom meej qhov kev vam meej ntawm cov txheej txheem smelting.
4. Alloying nyhuv
Lub hauv paus ntsiab lus: Tom qab silicon carbide decomposes, nws cov khoom silicon tseem nyob hauv cov hlau molten.
Cov nyhuv: Qhov no silicon ua raws li cov khoom siv alloying, ua kom lub zog, hardness, thiab elastic txwv ntawm cov hlau.
5. Purifying Molten Steel thiab txhim kho Fluidity
Lub hauv paus ntsiab lus: Cov tshuaj tiv thaiv deoxidation muaj zog txo cov oxide inclusions hauv cov hlau molten, ua kom huv.
Cov nyhuv: Qhov no tsis yog tsuas yog txhim kho cov khoom siv ntawm cov hlau (xws li qaug zog, toughness) tab sis kuj txhim khu lub fluidity ntawm cov hlau molten, ua kom yooj yim casting thiab txo qhov tsis xws luag.
3. Vim li cas thiaj xaiv Silicon Carbide rau Steelmaking? (Qhov zoo)
Muab piv rau ib txwm ib txwm siv - lub hom phiaj deoxidizers (xws li ferrosilicon) thiab carburizers (xws li coke), silicon carbide muaj txiaj ntsig zoo:
Cov txiaj ntsig zoo: Nws ua tiav ntau yam cuam tshuam -deoxidation, carburization, cua sov, thiab alloying-ib txhij nrog ib qho khoom, ua kom yooj yim cov txheej txheem ua haujlwm thiab kev tswj cov khoom.
Kev ua haujlwm siab thiab ua tau zoo: Cov khoom deoxidation yooj yim rau ntab thiab tshem tawm, ua rau cov hlau huv huv thiab cov khoom siv hlau zoo dua.
Kev Ua Haujlwm Zoo Kev Lag Luam: Txawm hais tias nws cov nqi tsev yuav siab dua coke, nws cov txiaj ntsig zoo thiab kev ua tau zoo ua rau txo qis tag nrho cov nqi tsim khoom.
Environmental Friendliness: Qee cov khoom siv tshuaj tiv thaiv yog gaseous, txo qhov tsim cov khoom pov tseg.
4. Nyob rau hauv qhov tseem ceeb Steelmaking txheej txheem yog nws feem ntau siv?
Silicon carbide rau steelmaking feem ntau yog siv hauv cov txheej txheem hauv qab no:
Hluav taws xob Arc Rauv (EAF) Steelmaking: Ua haujlwm ua cov khoom deoxidizing thiab alloying thaum lub sij hawm txo.
Secondary Refining (piv txwv li, Ladle rauv - LF): Qhov no yog ib qho kev kho mob tseem ceeb tom qab tapping thiab ua ntej casting. Ntxiv silicon carbide ntawm no kom sib sib zog nqus deoxidation thiab muaj pes tsawg leeg zoo -tuning yog ib qho ntawm nws cov kev siv feem ntau.
Hloov Steelmaking: Ntxiv thaum lub sij hawm tapping txheej txheem rau ua ntej -deoxidation thiab alloying.
Cam khwb cia hlau Melting: Kuj feem ntau siv los ua ntej- kho cov hlau molten thaum tsim cov hlau zoo - zoo cam khwb cia hlau, txhim kho graphite morphology, thiab tiv thaiv "chij" (dawb hlau tsim).
Cov ntsiab lus
Silicon carbide rau steelmaking yog siab -kev ua tau zoo metallurgical additive tshwj xeeb tsim rau kev lag luam hlau thiab hlau. Leveraging nws cov khoom tshwj xeeb tshuaj, nws ib txhij plays lub luag hauj lwm tseem ceeb hauv deoxidation, carburization, cua sov, thiab alloying thaum lub sij hawm steelmaking txheej txheem. Nws zoo txhim kho cov hlau zoo, ua kom yooj yim cov txheej txheem ntws, thiab txo cov nqi tsim khoom, ua rau nws yog ib qho khoom siv tsis tseem ceeb hauv cov hlau niaj hnub metallurgy.
