Hluav taws xob arc rauv steelmaking yog raws lielectrodeslos tsim cov arcs, kom lub zog hluav taws xob tuaj yeem hloov pauv mus rau hauv lub zog hluav taws xob hauv lub arc, melting furnace load thiab tshem tawm impurities xws li sulfur thiab phosphorus, ntxiv cov khoom tsim nyog (xws li carbon, nickel, manganese, thiab lwm yam) rau smelt steel los yog alloy. nrog ntau yam khoom. Lub tshuab hluav taws xob hluav taws xob cua sov tuaj yeem tswj tau qhov kub thiab txias ntawm lub cub tawg thiab tsim cov pa roj cua kub tsawg. Lub tshav kub efficiency ntawm arc steelmaking rauv yog siab dua li ntawm lub converter.
Kev txhim kho thev naus laus zis muaj keeb kwm txog 100 xyoo hauv EAF steelmaking, txawm hais tias lwm txoj hauv kev ib txwm ntsib cov kev sib tw steelmaking thiab kev sib tw, tshwj xeeb tshaj yog cov kev ua haujlwm siab oxygen steelmaking, tab sis feem ntau ntawm cov hlau tsim ntawm EAF steelmaking nyob rau hauv lub ntiaj teb steel cov zis tseem nce xyoo. los ntawm xyoo. Nyob rau hauv thaum ntxov 1990s, steel tsim los ntawm EAF nyob rau hauv lub ntiaj teb no accounted rau 1/3 ntawm tag nrho cov hlau tso zis. Hauv qee lub tebchaws, EAF yog cov thev naus laus zis thev naus laus zis hauv qee lub tebchaws, thiab feem ntau ntawm cov hlau tsim los ntawm EAF smelting yog 70% siab dua li hauv Ltalis.
Xyoo 1980s, thoob plaws hauv EAF steel ntau lawm hauv kev nruam nruam, thiab maj mam tsim "kev txuag hluav taws xob ntawm cov khoom siv hluav taws xob preheating arc rauv smelting lub refining nruam nruam rolling, arc rauv yog tsuas yog siv rau cov khoom siv ceev ceev raws li raw khoom. cov khoom siv hlau ua. Txhawm rau txhawm rau kov yeej lub zog siab ultra siab AC arc rauv arc instability, peb-theem fais fab mov thiab tam sim no tsis txaus thiab muaj kev cuam tshuam loj heev ntawm daim phiaj hluav taws xob thiab kev tshawb fawb ntawm DC arc rauv, thiab muab tso rau hauv daim ntawv thov kev lag luam rau thawj xyoo pua.
Nyob rau hauv nruab nrab-1990s, DC arc rauv siv tsuas yog 1 lub hauv paus ntawm graphite electrode tau dav siv nyob rau hauv lub ntiaj teb no nyob rau hauv 90s (2 nrog ib co graphite electrode DC arc rauv).
Kev txo qis kev noj cov graphite electrodes yog qhov zoo tshaj plaws ntawm DC arc rauv, ua ntej xyoo 1970s, AC arc rauv ib tuj ntawm steel noj ntawm graphite electrode nyob rau hauv 5 ~ 8kg, graphite electrode nqi accounted rau 10% ntawm tag nrho cov nqi. ntawm cov hlau mus rau 15%, txawm tias tau siv ntau qhov kev ntsuas, kom cov graphite electrode noj tsawg dua 4 6kg, lossis cov nqi tsim khoom suav txog 7% 10%, kev siv lub zog siab thiab ultra siab zog steelmaking txoj kev, electrode yak txo. mus rau 2 ~ 3k.g / T steel, DC arc rauv uas siv tsuas yog 1 graphite electrode, graphite electrode noj yuav raug txo mus rau 1.5kg / T steel hauv qab.
Ob txoj kev xav thiab kev xyaum qhia tau hais tias ib qho kev noj ntawm graphite electrode tuaj yeem raug txo los ntawm 40% mus rau 60% piv nrog AC arc rauv.
Post lub sij hawm: May-06-2022