Nyob rau hauv niaj hnub steelmaking, refractory kev ua tau zoo ncaj qha cuam tshuam rau lub cub tawg efficiency, phiaj xwm lub neej, thiab cov nqi khiav hauj lwm. Ntawm tag nrho cov txheej txheem refractory raw khoom,tuagburned magnesiaua lub luag haujlwm tseem ceeb hauv siab - qhov kub thiab tshuaj lom neeg ib puag ncig xws li hluav taws xob arc rauv (EAF) thiab cov pa hluav taws xob yooj yim (BOF).
Kab lus no piav qhia vim li cas DBM yog qhov tseem ceeb rau steelmaking refractories, nws piv nrog rau lwm cov ntaub ntawv magnesia, thiab vim li cas cov nroj tsuag steel nce siab purity magnesia nrog kev ua haujlwm ruaj khov.
Deadburned Magnesia yog dab tsi?
Tuag hlawv magnesia, tseem hu ua tuag hlawv magnesia, yog ib yam khoom siv magnesia uas tsim los ntawm calcining magnesite lossis magnesium hydroxide ntawm qhov kub siab heev, feem ntau siab dua 1700-2000 degree. This high-temperature sintering process results in a dense, chemically stable structure with very low reactivity.
DBM feem ntau hu ua sintered magnesia, qhov txawv ntawm nws los ntawm maj mam hlawv magnesia los yog caustic magnesia siv nyob rau hauv tshuaj industries.
Cov yam ntxwv tseem ceeb ntawm cov tuag hlawv magnesia muaj xws li:
Cov ntsiab lus siab MgO (feem ntau 90-97%)
Tsawg porosity thiab siab bulk ntom
Zoo heev tiv thaiv slag thiab alkali nres
High refractoriness thiab thermal stability
Cov khoom no ua rau DBM indispensable nyob rau hauv steelmaking refractory systems.
Vim li cas Steelmaking Yuav Tsum Tau Deadburned Magnesia
1. Kev khiav hauj lwm kub heev
Steelmaking furnaces ua haujlwm nyob rau hauv qee qhov hnyav tshaj plaws thermal mob hauv kev lag luam metallurgical. Hauv EAF thiab BOF daim ntawv thov, cov ntaub ntawv refractory tau raug kub siab tshaj 1600 degree, feem ntau nrog cov cua kub ceev thiab cua txias.
DBM tuav cov txheej txheem kev ncaj ncees ntawm cov kub no vim nws:
Siab melting point (~ 2800 degree)
Cov qauv siv lead ua ruaj khov tom qab siab -kub sintering
Tsawg shrinkage thaum siv
Piv nrog rau qis dua - qib magnesia, tuag hlawv magnesia muab kev ruaj ntseg zoo tshaj plaws nyob rau hauv lub sij hawm siab - qhov kub thiab txias.
2. Superior Slag Resistance nyob rau hauv Basic Environments
Steelmaking slags yog ib qho yooj yim heev thiab nplua nuj nyob rau hauv CaO, FeO, thiab lwm yam oxides txhoj puab heev. Cov khoom siv refractory yam tsis muaj tshuaj lom neeg txaus yuav raug kev xeb sai thiab nkag mus.
Tuag hlawv magnesia nthuav tawm zoo heev compatibility nrog yooj yim slags vim:
MgO reacts tsawg kawg nkaus nrog CaO- nplua nuj slags
Cov qauv ntom ntom sintered txo cov slag nkag
High purity magnesia minimizes qaug zog theem
Qhov no yog vim li cas DBM yog cov khoom siv tseem ceeb rau magnesia bricks, magnesia-carbon cib, thiab magnesia spinel refractories siv nyob rau hauv steel furnaces.
Deadburned Magnesia vs. Lwm hom Magnesia
Nkag siab qhov sib txawv ntawm qhov tuag hlawv magnesia thiab lwm yam khoom siv magnesia yog qhov tseem ceeb rau cov neeg yuav khoom refractory.
Tuag hlawv Magnesia vs. Lightly Burned Magnesia
Maj mam hlawv magnesia yog calcined ntawm qhov kub qis dua thiab tseem muaj zog heev. Thaum tsim nyog rau kev siv tshuaj lom neeg lossis ib puag ncig, nws tsis muaj qhov thermal thiab tshuaj lom neeg ruaj khov uas xav tau rau steelmaking refractories.
Hauv qhov sib piv, DBM yog sintered tag nrho, ua rau nws ruaj khov dua ntawm qhov kub thiab txias.
Tuag hlawv Magnesia vs. Fused Magnesia
Fused magnesia yog tsim los ntawm hluav taws xob arc melting thiab muaj siab purity thiab ceev heev. Txawm li cas los xij, tuag hlawv magnesia tseem siv dav vim:
Ntau tus nqi sib npaug -kev ua tau zoo
Stable grain qauv haum rau cib nias
Kev muab khoom zoo ib yam rau loj - ntim refractory ntau lawm
Rau ntau daim ntawv thov steelmaking, siab -purity DBM muab kev ua tau zoo txaus yam tsis muaj tus nqi siab dua ntawm fused magnesia.
Qhov tseem ceeb ntawm High Purity Magnesia hauv Steelmaking
Tsis yog txhua qhov tuagburned magnesia ua tau zoo ib yam.High purity magnesia, feem ntau nrog MgO cov ntsiab lus ntawm95–97%, yog nce nyiam los ntawm steel nroj tsuag.
Siab purity muab:
Txo cov impurity theem (SiO₂, CaO, Fe₂O₃)
Txhim kho kub lub zog thiab corrosion kuj
Zoo sib xws hauv refractory cib kev ua tau zoo
Nyob rau hauv BOF converters thiab EAF sidewalls, siab purity DBM pab ncaj qha mus rau hauv lub neej ntev thiab txo downtime.
Hom Steelmaking Applications ntawm Deadburned Magnesia
Tuag hlawv magnesia yog dav siv nyob rau hauv ntau yam steelmaking refractory Cheebtsam, xws li:
EAF ua haujlwm hauv ob sab phlu thiab kev nyab xeeb hauv ob sab phlu
BOF converter linings
Ladle slag kab
Tundish cuam tshuam thaj chaw
Refractory castables thiab phom sib tov
Nyob rau hauv cov ntaub ntawv no, tuag hlawv magnesia ua hauj lwm raws li ib tug thawj aggregate los yog tseem ceeb raw cov ntaub ntawv kom ntseeg tau tias tiv thaiv thermal shock, slag nres, thiab mechanical hnav.
Vim li cas Deadburned Magnesia tseem yog cov khoom siv raw khoom
Nrog rau kev lag luam steel thoob ntiaj teb mus rau kev tsim khoom ntau dua thiab kev sib tw ua kom ntev dua, qhov kev thov rau cov khoom siv raw khoom ruaj khov txuas ntxiv mus ntxiv. DBM tseem yog qhov kev xaiv zoo vim nws muaj:
Pov thawj kev ua tau zoo nyob rau hauv siab -kub steelmaking
Compatibility nrog niaj hnub refractory formulations
Cov khoom lag luam ruaj khov rau kev siv loj -scale kev lag luam
Raws li kev ua haujlwm ntawm lub tshuab ua kom sov ua rau xav tau ntau dua, lub luag haujlwm ntawm siab -DBM zoo dhau los ua qhov tseem ceeb dua.
Deadburned magnesia yog qhov tseem ceeb rau siab -kub refractory daim ntaub ntawv nyob rau hauv steelmaking vim hais tias nws muab lub thermal stability, slag tsis kam, thiab chemical durability yuav tsum tau nyob rau hauv EAF thiab BOF ib puag ncig. Piv nrog rau lwm cov ntaub ntawv magnesia, tuag hlawv magnesia thiab sintered magnesia muab qhov zoo tshaj plaws tshuav nyiaj li cas ntawm kev ua tau zoo thiab tus nqi, tshwj xeeb tshaj yog thaum tsim los ntawm high purity magnesia.
Rau cov neeg tsim khoom steel thiab cov chaw tsim hluav taws xob zoo ib yam, xaiv cov qib zoo ntawm DBMis yog qhov tseem ceeb hauv kev ua kom lub neej ntev, txo kev txij nkawm, thiab txhim kho tag nrho cov khoom siv hluav taws xob.
