Iimpawu zeLF furnace Refined Steel

I -1 LF Furnace Atmosphere
Isithando somlilo se-LF senza unyango olunyibilikisiweyo lokusulungekiswa kwentsimbi phantsi koxinzelelo oluqhelekileyo, kwaye isigqubuthelo somlilo esipholileyo samanzi sinokusebenza njengomsebenzi wokutywina wokwahlula umoya. Xa ishushu, i-electrode yegraphite isabela kunye ne-oxides efana ne-FeO kunye ne-MnO kwi-slag ukwenza i-CO gas, eyandisa ipropati yokunciphisa igesi yesithando somlilo. Ukongeza, i-electrode yegraphite iphinda isebenze neoksijini kwintsimbi ukwenza i-carbon-oxide, ngaloo ndlela ivumela i-LF. Umxholo we-oksijeni kwi-atmospheric yesithando somlilo uyancitshiswa ukuze kuqinisekiswe ukunciphisa okunamandla kwi-atmosphere yesithando somlilo. Intsimbi etyhidiweyo inokuphinda i-deoxidized, i-desulfurized kwaye isuswe yi-non-metallic inclusions phantsi kweemeko zokunciphisa ukuphucula umgangatho wentsimbi etyhidiweyo.
Ngokweemfuno ezahlukeneyo zamabakala entsimbi, i-agent yokunciphisa i-silicon carbide powder inokongezwa kwiziko kwiibhetshi ukugcina umoya onamandla wokunciphisa eziko, ukukhawulezisa isantya sokusulungekisa, kwaye kwangaxeshanye ukunciphisa i-electrode oxidation kunye nokunciphisa i-electrode. ukusetyenziswa.

2 Ukuvuthela kweArgon
1) Imisebenzi engundoqo yokuvuthela nge-argon yile:
a. I-Foaming, umphumo wokuhlamba umoya: ukunciphisa umxholo we- [H], [N] kwintsimbi etyhidiweyo, kunye nokususa ngakumbi i-oksijini kwintsimbi;
b. Impembelelo yokuvuselela: i-detachable [S], susa ukufakwa, ukufakwa kwe-slag, ukwenzela ukuba ukushisa kunye nokubunjwa kufana;
c. Ukukhuselwa: I-Argon igesi iphuma kwintsimbi etyhidiweyo kwaye igubungela ubuso bentsimbi etyhidiweyo ukuphepha i-oxidation yesibini yentsimbi etyhidiweyo;
I- Argon Stirring Mechanism
Ekubeni impembelelo ye-argon evuthela ukuphazamiseka kwinkqubo yokucoca i-metallurgical yeziko lokusulungekisa ichaphazela ngokuthe ngqo isiphumo sokusulungekiswa, umphumo wokucoca unxulumene nezinto ezifana noxinzelelo oluvuthela i-argon, izinga lokuhamba kwe-argon, ixesha lokucubungula, kunye nobukhulu be-bubble eveliswa.
Ngoko ke, ukukhetha inkqubo efanelekileyo yokuvuthela i-argon ayikwazi ukufezekisa umphumo olindelekileyo we-metallurgical, kodwa ivelise izibonelelo ezilungileyo zoqoqosho.

3 Ukufudumeza kwe-Arc ephantsi kwamanzi
I-furnace ye-LF isebenzisa umbane we-AC wamanqanaba amathathu, kwaye isebenzisa ii-arcs ezintathu ze-electrode ukufudumeza intsimbi etyhidiweyo. Xa ukufudumala, i-electrode ifakwe kwi-slag layer ngokusebenza kwe-arc ephantsi kwamanzi, i-arc inemitha encinci ye-thermal kwindonga yokugubungela, kwaye ubudala bepakethi buphuculwe, kunye nokusebenza kakuhle kwe-thermal yokufudumeza kuphezulu, kunye nesantya sokusetyenziswa kobushushu. iphezulu. Kulungile, ke ngoko, kuyafuneka ukuba kuqinisekiswe i-slag entle entywilayo.
I-electrode yegraphite isabela nge-oxide kwi-slag, kwaye ngenxa yoko, kungekhona nje i-oxide engazinzile kwi-slag iyancitshiswa, ipropati yokunciphisa i-slag iphuculwe, kwaye isivuno se-alloy siphuculwe. Esinye isiphumo kukuba ubuninzi begesi ye-CO iveliswa, okwandisa umoya wokunciphisa kwisithando somlilo kunye nokuphucula ngakumbi umgangatho wensimbi etyhidiweyo.
Isixa se-slag ye-arc slag edibeneyo ngokuqhelekileyo i-1 ukuya kwi-1.5% yensimbi etyhidiweyo, kunye nenkqubo ye-CaO-CaF2 okanye inkqubo ye-CaO-Al2O3 isetyenziswa ngokuqhelekileyo.
4 Intsalela emhlophe Ukusulungekiswa
I-LF smelting ye-smelting kukusebenza kwe-slag emhlophe, kunye ne-slag emhlophe inokunciphisa okunamandla. Esi sisiphumo somoya omhle wokunciphisa kunye ne-argon evuselela intsebenziswano kwisithando somlilo seLF. Ngokuqhelekileyo, i-slag yi-2 ukuya kwi-3% yexabiso lensimbi etyhidiweyo, edlula emhlophe. Ukusebenza kwe-slag kunciphisa i-oksijeni, isulfure kunye nokufakwa kwintsimbi.


Ixesha lokuposa: Mar-18-2022