1. Vim li cas argon roj siv los hloov cov roj nitrogen rau tshuab thiab nplawm?
Argon roj nyob rau hauv inert gases yog insoluble nyob rau hauv molten hlau thiab tsis hnov mob nrog ib yam khoom. Nws yog ib qho zoo tagnrho stirring gas thiab yog li ntawd dav siv. Nyob rau hauv cov nqe lus ntawm stirring, nitrogen yog tib yam li argon thiab yog pheej yig dua. Txawm li cas los xij, nitrogen tuaj yeem yaj hauv cov hlau molten ntawm qhov kub thiab txias, thiab nws cov nitrogen ntxiv nrog rau qhov kub thiab txias thiab ncua sij hawm ntawm nitrogen tshuab. Thaum qhov kub siab tshaj 1575 degree, nws tuaj yeem nce cov ntsiab lus nitrogen hauv cov hlau los ntawm 0.003%, cuam tshuam rau cov hlau zoo. Yog li ntawd, kev siv cov nitrogen raws li cov roj stirring yog txwv, thiab tsuas yog ib tug me me ntawm nitrogen-muaj steel qib siv tau nitrogen raws li ib tug stirring gas, thiab tseem muaj cov teeb meem ntawm unstable nitrogen ntxiv.
2. Dab tsi yog qhov tseem ceeb ntawm cov tshuaj tiv thaiv decarbonization rau cov txheej txheem steelmaking?
- Cov pa roj carbon nyob rau hauv cov hlau molten yog oxidized los ntawm decarburization cov tshuaj tiv thaiv rau ib qho kev qhia tshwj xeeb ze los yog sib npaug rau cov pa roj carbon monoxide nyob rau hauv cov hlau molten thaum lub sij hawm steelmaking.
- Lub circulating stirring nyhuv ntawm lub molten pas dej ua ke.
- Cov CO generated yog tsim nyog rau tshem tawm cov pa roj los ntawm cov hlau.
- Nws muaj txiaj ntsig zoo rau kev tshem tawm cov khoom tsis yog hlau hauv cov hlau.
- Muab cov khoom cua sov rau steelmaking cov tshuaj tiv thaiv.
- Muaj txiaj ntsig zoo rau cov tshuaj tiv thaiv ntawm slag thiab hlau thaum lub tshuab tshuab.
3. Vim li cas steelmaking yuav tsum tsim slag?
Ua kom zoo hlau, thawj kauj ruam yog ua kom zoo slag, thiab ua tiav ntawm yuav luag txhua txoj haujlwm steelmaking yog cuam tshuam nrog slag. Lub hom phiaj ntawm kev ua slag yog:
- Tshem tawm cov khoom tsis zoo P thiab S los ntawm cov hlau.
- Npog lub npoo ntawm cov hlau molten nrog steelmaking slag, tiv thaiv cov hlau molten los ntawm oxidation ntau dhau, nqus cov pa phem, tswj kev rwb thaiv tsev, thiab txo qhov kub hnyiab ntawm cov khoom muaj txiaj ntsig.
- Absorb floating impurities thiab tshuaj tiv thaiv cov khoom.
- Xyuas kom meej qhov kev vam meej ntawm cov pa roj carbon monoxide cov tshuaj tiv thaiv.
- Nws tuaj yeem txo qhov kev yaig ntawm lub tshuab hluav taws xob hauv ob sab phlu.